XSol Diagnostic System

Interactive Test Sequence Navigator

Welcome to the XSol Diagnostic System

This system provides interactive diagnostic tests with proper sequence navigation based on the decoded .seq file logic.

Start Diagnostic Sequence

or choose a specific test below:

WORCESTER GREENSTAR COMPACT COMBI

GLOBALLY REPLACED

Next: &400, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

OBSERVATION BOILER SELF CHECK

ENSURE CENTRAL HEATING TURNED OFF
ENSURE APPLIANCE IS SET TO ECO MODE

Next: &38, ?411, ?2293, ?2307

OBSERVATION PUMP RUNS

ENSURE APPLIANCE IS SET TO ECO MODE
DHW TEMPERATURE CONTROL TO MAX

Next: &57, f436

OBSERVATION FAN RUNS

ENSURE APPLIANCE IS SET TO ECO MODE
DHW TEMPERATURE CONTROL TO MAX

Next: &176, f508

OBSERVATION BURNER IGNITION

ENSURE APPLIANCE IS SET TO ECO MODE
DHW TEMPERATURE CONTROL TO MAX

Next: &266, ?228, ?1481, ?2061, ?2119, ?2315

OBSERVATION CH DEMAND

Next: &303, f270

OPERATION DHW

DHW TEMPERATURE CONTROL TO MAX

Next: &635, ?278, ?281, ?306, ?364, ?379

OPERATION CH

CH TEMPERATURE CONTROL TO MAX

Next: &277, ?304, ?308, ?326, ?719

OBSERVATION PUMP OVERRUN

ENSURE BOILER IS SET TO ECO MODE

Next: &1844, ?775, ?780, ?3158

WORCESTER GREENSTAR COMPACT COMBI

Next: &523, !f401

FAULT CODES

Next: &nff, !f410

TYPE OF DIAGNOSTIC PROCEDURE

Next: &526, !f524

OBSERVATION DISPLAY ILLUMINATES

Next: &2953, f548

OPERATION PREHEAT

EXTERNAL AND INTERNA

Next: &342, ?3162, ?3171, ?3173

ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

BLANK

Next: &nff, ?1489, ?1491, ?1493, ?1515, ?1551, ?1573, ?1618, ?1703, ?1839, ?1866, ?1870, ?2657

FAULT CODE H11 324 325 359 808 810

Next: &nff, p879

FAULT CODE 210 E9

OUTSIDE MODEL

Next: &nff, p885

FAULT CODE 221 E9

OUTSIDE MODEL

Next: &nff, p923

FAULT CODE 231 FD

OUTSIDE MODEL

Next: &nff, f931

FAULT CODE 375 376 E4

Next: &nff, f1293

FAULT CODE 233 9U

OUTSIDE MODEL

Next: &nff, f942

FAULT CODE 240 241 286 D1 285 E9

OUTSIDE MODEL

Next: &nff, f1002

FAULT CODE 223 E2

Next: &nff, f993

FAULT CODE 264 C1

Next: &nff, f1008

FAULT CODE 239 242-256 258 259 262 263 267 272 279 280 328 F0 257 B7 269 EA

Next: &nff, f1015

FAULT CODE 228 F7

OUTSIDE MODEL

Next: &nff, f1019

FAULT CODE H13

Next: &nff, f1034

FAULT CODE 323 A8

OUTSIDE MODEL

Next: &nff, f1161

FAULT CODE 327

Next: &nff, f1042

FAULT CODE 306 FA

Next: &nff, f1046

FAULT CODE 229 EA 374 8C

Next: &nff, f2530

FAULT CODE 260 345 EF

OUTSIDE MODEL

Next: &nff, f1416

FAULT CODE 271

Next: &nff, f1443

FAULT CODE 278 F0

Next: &nff, f1268

FAULT CODE 380

Next: &nff, f1310

FURTHER INVESTIGATION FUSE PCB DUMMY

Next: &nff, f2388

FURTHER INVESTIGATION MAINS FUSE DUMMY

Next: &nff, f2407

INFORMATION BOILER SETUP PARAMETERS


1. ENTER

Next: &nff, !f1360

FAULT CODE 219 220 277 E9

OUTSIDE MODEL

Next: &nff, f1367

FAULT CODE 218 332 E5 222 E2 276 E9

OUTSIDE MODEL

Next: &nff, f1391

FAULT CODE 237 273 C4 274

Next: &nff, f1424

FAULT CODE 212

OUTSIDE MODEL

Next: &nff, f1434

FAULT CODE 373 8C

OUTSIDE MODEL

Next: &nff, f1462

INFORMATION BOILER TEST MODES


1. ENTER

Next: &nff, !f1488

INFORMATION SETUP PARAMETER LIST

OUTSIDE MODEL, NOT CURRENTLY USED.

Next: &nff, !f1529

FAULT CODE 800 CC

OUTSIDE MODEL

Next: &nff, f1708

COMBUSTION TEST MAX AND MINIMUM

Next: &nff, ?1846, ?1848

FAULT CODE 234 EA

OUTSIDE MODEL

Next: &nff, f2662

FAULT CODE 238 F0

OUTSIDE MODEL

Next: &nff, f2682

OBSERVATION SPARKING HEARD

REMOVE AIR INTAKE FR

Next: &nff, !f2690

INFORMATION USER DISPLAY

Next: &1, !f2954

FAULT CODE 258 356 EH

Next: &nff, f3148

FAULT CODE 1001 A21 1002 A22 1003 A23 1004 A24 1007 A27 1008 A28 1081-1084 3061-3064 3091-3094 A61-A64

BLANK

Next: &nff, f3234

LITE DIAGNOSTIC

DIAGNOSIS RELIES ON

Next: &nff, !f3243

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW SHOW

Next: &nff, !f3245

HEADER FOR QADAI SENSOR DHW

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3247

HEADER FOR QADAI SENSOR FLOW

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3251

HEADER FOR QADAI SENSOR RETURN

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3256

HEADER FOR QADAI SENSOR SAFETY

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3260

HEADER FOR QADAI SPARK GEN RESISTANCE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3264

HEADER FOR QADAI SPARK GEN VOLTAGE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3266

HEADER FOR QADAI PUMP RESISTANCE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3272

HEADER FOR QADAI PUMP VOLTAGE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3274

HEADER FOR QADAI FAN RESISTANCE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3276

HEADER FOR QADAI FAN VOLTAGE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3278

HEADER FOR QADAI DIVERTER VALVE VOLTAGE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3280

HEADER FOR QADAI GAS VALVE RESISTANCE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3282

HEADER FOR QADAI GAS VALVE VOLTAGE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3284

HEADER FOR QADAI FLOW TURBINE VOLTAGE

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3286

HEADER FOR QADAI SENSOR DHW INLET

INTENTIONALLY BLANK FOR QADAI

Next: &nff, f3437

HEADER FOR QADAI DIVERTER VALVE RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f3462

FAULT CODE 223 E2

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 240 241 286 D1 285 D9

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 264 C1

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 239 242-256 258 259 262 263 267 272 328 F0 257 B7

CONTROL BOX - SKIN MID

Next: End

FAULT CODE H13

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 306 FA

FLUE

Next: End

FAULT 306 FA

SYPHON - LCS

Next: End

FAULT CODE 306 FA PASSING

GAS VALVE

Next: End

FAULT CODE 306 FA NOT SHUTTING QUICKLY

GAS VALVE

Next: End

FAULT CODE 327

RESET SWITCH

Next: End

FAULT CODE 228 F7

HARNESS - LOW VOLTAGE

Next: End

FAULT 228 F7

SYPHON - LCS

Next: End

FAULT CODE 228 F7

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 323 A8 FW100 NOT FITTED

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 323 A8 FW100 FITTED

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 278 F0 RETURN SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 278 F0

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 278 F0

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 278 F0

SENSOR - TEMPERATURE (DHW)

Next: End

FAULT CODE 375 376 E4 SENSOR NOT FITTED

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 375 376 E4

SENSOR NTC - RIGHT ANGLED (DHW INLET SENSOR)

Next: End

FAULT CODE 380 SENSOR NOT FITTED

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 380

SENSOR NTC - RIGHT ANGLED (DHW INLET SENSOR)

Next: End

INFORMATION BOILER SETUP PARAMETERS

Z REDIRECT

Next: End

FAULT CODE 219 220 277 E9 WILL NOT RESET

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 219 220 227 E9 WILL NOT RESET

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 219 220 277 E9 INFORMATION BOILER OVERHEAT

Z REDIRECT

Next: End

FAULT CODE 219 220 277 E9

SYSTEM PRESSURE

Next: End

FAULT CODE 219 220 277 E9

PUMP

Next: End

FAULT CODE 219 220 277 E9

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9 WILL NOT RESET

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9 INFORMATION BOILER OVERHEAT

Z REDIRECT

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9

SYSTEM PRESSURE

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9

PUMP

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9 WILL NOT RESET

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 260

SYSTEM PRESSURE

Next: End

FAULT CODE 260 RUNNING SLOW

PUMP

Next: End

FAULT CODE 260

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 237 273 C4 274

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 212

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 212

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 212

PUMP

Next: End

FAULT CODE 212

SYSTEM PRESSURE

Next: End

FAULT CODE 271

SYSTEM PRESSURE

Next: End

FAULT CODE 271

PUMP

Next: End

FAULT CODE 271

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 271

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 373 8C

Z REDIRECT

Next: End

FAULT CODE 373 8C

SYSTEM PRESSURE

Next: End

FAULT CODE 373 8C

PUMP

Next: End

FAULT CODE 373 8C WILL NOT RESET

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 373 8C

SENSOR 18MM (FLOW)

Next: End

OBSERVATION BURNER IGNITION IGNITES BUT CUTS OUT

SENSOR 18MM (FLOW)

Next: End

OBSERVATION BURNER IGNITION IGNITES BUT CUTS OUT

SENSOR - NTC MAX (OVERHEAT)

Next: End

INFORMATION BOILER TEST MODES

Z REDIRECT

Next: End

DUMMY VOLTAGE SPARK GENERATOR AT PCB WITHOUT DISPLAY 1

Z REDIRECT

Next: End

DUMMY VOLTAGE SENSOR FLUE AT TEMP (NO DISPLAY) 2

Z REDIRECT

Next: End

DUMMY DIFFERENTIAL SENSOR FLOW AND SAFETY AND TEMP (NO DISPLAY) 2

Z REDIRECT

Next: End

DUMMY VOLTAGE RECTIFICATION CIRCUIT (NO DISPLAY) 2

Z REDIRECT

Next: End

INFORMATION SETUP PARAMETER LIST

Z REDIRECT

Next: End

DUMMY OBSERVATION SPARK GENERATOR OUTPUT (NO DISPLAY) 2

Z REDIRECT

Next: End

ALTERNATIVE TESTS VOLTAGE RECTIFICATION CIRCUIT (NO DISPLAY)

HARNESS - LOW VOLTAGE

Next: End

DUMMY OPERATION PREHEAT (NO DISPLAY) 2

Z REDIRECT

Next: End

DUMMY DIFFERENTIAL SENSOR FLOW AND SAFETY DHW ONLY (NO DISPLAY) 2

Z REDIRECT

Next: End

OPERATION DHW FLOW RATE NOT OBTAINABLE

ISOLATION VALVES

Next: End

OPERATION DHW DHW COOL RADS COOL

SENSOR - TEMPERATURE (DHW)

Next: End

DUMMY VOLTAGE DIVERTER VALVE AT PCB (DISTANT FUSE SPUR) 2

Z REDIRECT

Next: End

FAULT CODE 800 CC SENSOR NOT FITTED

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 800 CC SENSOR FITTED

CONTROL BOX - SKIN MID

Next: End

DUMMY OBSERVATION DIVERTER MOVEMENT (DISTANT FUSE SPUR) NO CH 2

Z REDIRECT

Next: End

COMBUSTION TEST

ELECTRODE

Next: End

FAULT CODE 278 F0

SENSOR NTC - RIGHT ANGLED (DHW INLET SENSOR)

Next: End

DUMMY OBSERVATION DIVERTER MOVEMENT (DISTANT FUSE SPUR) POOR CH 2

Z REDIRECT

Next: End

OBSERVATION PUMP RUNS INSUFFICIENT FLOW

WATER SUPPLY (BELOW MINIMUM)

Next: End

OBSERVATION DIVERTER MOVEMENT OFF ONLY (DISTANT FUSE SPUR) 2

Z REDIRECT

Next: End

OPERATION DHW

WATER SUPPLY (INSUFFICIENT)

Next: End

OBSERVATION FAN RUNS NO RESPONSE TO DHW NO INLET SENSOR

CONTROL BOX - SKIN MID

Next: End

OPERATION DHW TOO COOL BOILER CUTS OUT

PLATE HEAT EXCHANGER

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT STUCK OPEN

VALVE - BY-PASS

Next: End

OBSERVATION FAN RUNS

SENSOR 18MM (FLOW)

Next: End

OBSERVATION BURNER IGNITION DOES NOT IGNITE

SYPHON - LCS

Next: End

OBSERVATION BURNER IGNITION NO IGNITION

FLUE

Next: End

OBSERVATION BURNER IGNITION DOES NOT IGNITE

VALVE - GAS - AIR (BEARING PLATE)

Next: End

OBSERVATION BURNER IGNITION

CONTROL BOX - SKIN MID AND GAS VALVE

Next: End

OBSERVATION BURNER IGNITION TO GAS VALVE SPARK NO IGNITION

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION BURNER IGNITION NO IGNITION

PIPE - SUCTION (AIR INTAKE)

Next: End

OBSERVATION BURNER IGNITION IGNITION LEAD

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION BURNER IGNITION SPARK BUT NO IGNITION

ELECTRODE

Next: End

OBSERVATION BURNER IGNITION NO SPARKING

GAS VALVE

Next: End

FAULT CODE 278 F0 NO INLET SENSOR

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION NO POWER TO SPARK GEN

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION HARNESS TO SPARK GENERATOR NO SPARKING

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION BURNER IGNITION DOES NOT ESTABLISH

FLUE

Next: End

OBSERVATION BURNER IGNITION DOES NOT ESTABLISH

VALVE - GAS - AIR (BEARING PLATE)

Next: End

OBSERVATION BURNER IGNITION DOES NOT ESTABLISH

PIPE - SUCTION (AIR INTAKE)

Next: End

OBSERVATION BURNER IGNITION NOT ESTABLISHING NO CURRENT SHORTED

ELECTRODE

Next: End

OBSERVATION BURNER IGNITION RECTIFICATION GROUND

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION BURNER IGNITION RECTIFICATION LEAD

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION BURNER IGNITION NOT ESTABLISHING NO CURRENT

ELECTRODE

Next: End

OBSERVATION BURNER IGNITION IGNITION LEAD NO SPARKING

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION BOILER SELF CHECK BOILER SELF CHECK

FROST PROTECTION

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION

SENSOR 18MM (FLOW)

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION

OPEN TAP OR LEAK

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION INTERNAL CONTROLS

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION

Next: End

OBSERVATION BOILER SELF CHECK PUMP RUNS AFTER SELF CHECK

FROST PROTECTION

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION PUMP ONLY

SENSOR 18MM (FLOW)

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION FROST THERMOSTAT

Next: End

OBSERVATION BURNER IGNITION BAFFLES

SYPHON - LCS

Next: End

OBSERVATION BURNER IGNITION BAFFLES

FLUE

Next: End

OBSERVATION BURNER IGNITION BAFFLES

VALVE - GAS - AIR (BEARING PLATE)

Next: End

OBSERVATION BURNER IGNITION BAFFLES

PIPE - SUCTION (AIR INTAKE)

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

HEAT EXCHANGER ASSEMBLY

Next: End

OPERATION CH INSUFFICIENT HEAT TEMP SETTINGS

BOILER SETUP PARAMETERS

Next: End

FURTHER INVESTIGATION FUSE PCB

PUMP

Next: End

FURTHER INVESTIGATION FUSE PCB

GAS VALVE

Next: End

FURTHER INVESTIGATION FUSE PCB

FAN

Next: End

FURTHER INVESTIGATION FUSE PCB

TRANSFORMER - IGNITION

Next: End

FURTHER INVESTIGATION FUSE

CONTROL BOX - SKIN MID

Next: End

FURTHER INVESTIGATION MAINS FUSE

PUMP

Next: End

FURTHER INVESTIGATION MAINS FUSE

GAS VALVE

Next: End

FURTHER INVESTIGATION MAINS FUSE

FAN

Next: End

FURTHER INVESTIGATION MAINS FUSE

TRANSFORMER - IGNITION

Next: End

FURTHER INVESTIGATION MAINS FUSE

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES FAULTY DISPLAY

CONTROL BOX - SKIN MID

Next: End

OPERATION CH INSUFFICIENT HEAT

BURNER

Next: End

OPERATION CH INSUFFICIENT HEAT

VALVE - GAS - AIR (BEARING PLATE)

Next: End

OPERATION CH INSUFFICENT HEAT

FLUE

Next: End

FAULT CODE 229 EA BAFFLES

SYPHON - LCS

Next: End

FAULT CODE 229 EA BAFFLES

FLUE

Next: End

FAULT CODE 229 EA BAFFLES

VALVE - GAS - AIR (BEARING PLATE)

Next: End

FAULT CODE 229 EA BAFFLES

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 229 EA AIR INTEGRITY BAFFLES

FLUE

Next: End

FAULT CODE 229 EA BAFFLES OR NOISY

HOUSING - BURNER

Next: End

FAULT CODE 229 EA DOES NOT ESTABLISH

FLUE

Next: End

FAULT CODE 229 EA DOES NOT ESTABLISH

VALVE - GAS - AIR (BEARING PLATE)

Next: End

FAULT CODE 229 EA DOES NOT ESTABLISH

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 229 EA NOT ESTABLISHING NO CURRENT SHORTED

ELECTRODE

Next: End

FAULT CODE 229 EA RECTIFICATION GROUND

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 229 EAN RECTIFICATION LEAD

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 229 EA NOT ESTABLISHING NO CURRENT

ELECTRODE

Next: End

FAULT CODE 229 EADOES NOT IGNITE

SYPHON - LCS

Next: End

FAULT CODE 229 EA NO IGNITION

FLUE

Next: End

FAULT CODE 229 EA DOES NOT IGNITE

VALVE - GAS - AIR (BEARING PLATE)

Next: End

FAULT CODE 229 EA

CONTROL BOX - SKIN MID AND GAS VALVE

Next: End

FAULT CODE 229 EA TO GAS VALVE SPARK NO IGNITION

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 229 EA NO IGNITION

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 229 EA IGNITION LEAD

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 229 EA SPARK BUT NO IGNITION

ELECTRODE

Next: End

FAULT CODE 229 EA IGNITES OK

FLUE

Next: End

FAULT CODE 229 EA IGNITES OK

VALVE - GAS - AIR (BEARING PLATE)

Next: End

FAULT CODE 229 EA IGNITES OK

INLET PRESSURE

Next: End

FAULT CODE 229 EA IGNITION OK

ELECTRODE

Next: End

DUMMY OBSERVATION DIFFERENTIAL SAFETY AND FLOW CH ONLY (NO DISPLAY) 2

Z REDIRECT

Next: End

FAULT CODE 234 EA

GAS VALVE

Next: End

FAULT CODE 238 F0 RESETS BUT FAULT REOCCURS

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 234 EA

Z REDIRECT

Next: End

OBSERVATION SPARKING HEARD

Z REDIRECT

Next: End

OBSERVATION FAN RUNS NO RESPONSE TO DHW

SENSOR NTC - RIGHT ANGLED (DHW INLET SENSOR)

Next: End

FAULT CODE 238 F0

WATER INGRESS

Next: End

FAULT CODE 238 F0 WILL NOT RESET

GAS VALVE

Next: End

FAULT CODE 260 345 EF

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 260 345 EF NO POWER TO PUMP

CONTROL BOX - SKIN MID

Next: End

OBSERVATION CH DEMAND NOT RESPONDING TO DEMAND

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 271 NO POWER TO PUMP

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 271

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION CH DEMAND NO POWER TO EXT CONTROLS

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 373 8C NO POWER TO PUMP

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 373 8C

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION BURNER IGNITION BAFFLES OR NOISY

HOUSING - BURNER

Next: End

OBSERVATION BURNER IGNITION BAFFLES PRESSURE OK

BURNER

Next: End

OPERATION DHW DHW COOL RADS COOL

PUMP

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9

HEAT EXCHANGER ASSEMBLY

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9

Next: End

FAULT CODE 219 220 277 E9

HEAT EXCHANGER ASSEMBLY

Next: End

FAULT CODE 219 220 277 E9

Next: End

FAULT CODE 373 8C

Next: End

FAULT CODE 373 8C

HEAT EXCHANGER ASSEMBLY

Next: End

FAULT CODE 271

HEAT EXCHANGER ASSEMBLY

Next: End

FAULT CODE 271

Next: End

INFORMATION USER DISPLAY

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES PUMP RUNS AFTER SELF CHECK

FROST PROTECTION

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION PUMP ONLY

SENSOR 18MM (FLOW)

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION FROST THERMOSTAT

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK

FROST PROTECTION

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION

SENSOR 18MM (FLOW)

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION

OPEN TAP OR LEAK

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION INTERNAL CONTROLS

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK SENSOR OVERHEAT

SENSOR - NTC MAX (OVERHEAT)

Next: End

OBSERVATION BOILER SELF CHECK NO DISPLAY

WATER INGRESS

Next: End

OBSERVATION DISPLAY ILLUMINATES - SELF CHECK

GAS VALVE

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK INCORRECT POWER FAN PULSING

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FAN PULSES

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK

CODE PLUG

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK CODE PLUG

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK NO POWER TO FAN

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FAN DOES NOT RUN

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK NO VOLTAGE TO PUMP

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION DISPLAY ILLUMINATES DISPLAY 1

Z REDIRECT

Next: End

OBSERVATION PUMP RUNS DHW ISOLATIONNO DISPLAY

ISOLATION VALVES

Next: End

OBSERVATION PUMP RUNS INSUFFICIENT FLOWNO DISPLAY

WATER SUPPLY (BELOW MINIMUM)

Next: End

OBSERVATION PUMP RUNS NO POWER TO DHW TURBINENO DISPLAY

CONTROL BOX - SKIN MID

Next: End

OBSERVATION PUMP RUNS DHW TURBINENO DISPLAY

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION FAN RUNS RETURN SENSORNO DISPLAY

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION FAN RUNSNO DISPLAY

SENSOR 18MM (FLOW)

Next: End

OBSERVATION FAN RUNS DHW SENSORNO DISPLAY

SENSOR - TEMPERATURE (DHW)

Next: End

OPERATION CH REACHES TEMP RADS DO NOT HEAT

SYSTEM PRESSURE

Next: End

OBSERVATION FAN RUNS NOT FIRING FOR DHWNO DISPLAY

SENSOR - NTC MAX (OVERHEAT)

Next: End

OBSERVATION FAN RUNSNO DISPLAY

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

OBSERVATION FAN RUNS NO RESPONSE TO DHW NO INLET SENSORNO DISPLAY

CONTROL BOX - SKIN MID

Next: End

OPERATION CH BOILER REACHES TEMP RADS DO NOT HEAT

ISOLATION VALVES

Next: End

OBSERVATION FAN RUNS NO RESPONSE TO DHWNO DISPLAY

SENSOR NTC - RIGHT ANGLED (DHW INLET SENSOR)

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

FLUE

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

VALVE - GAS - AIR (BEARING PLATE)

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

BURNER

Next: End

OPERATION DHW TOO COOL STAYS LIT

SENSOR - TEMPERATURE (DHW)

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

SENSOR NTC - RIGHT ANGLED (RETURN SENSOR)

Next: End

OPERATION DHW TOO COOL RADS COOL

PLATE HEAT EXCHANGER

Next: End

FAULT CODE 258 356 EH

Next: End

FAULT CODE 258 356 EH

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK

SENSOR 18MM (FLOW)

Next: End

OPERATION PREHEAT

Next: End

OPERATION PREHEAT NOT RESPONDING TO DEMAND NO PROGRAMMER

CONTROL BOX - SKIN MID

Next: End

OPERATION PREHEAT NO RESPONDING TO DEMAND

CONTROL BOX - SKIN MID

Next: End

COMBUSTION TEST

PIPE - SUCTION (AIR INTAKE)

Next: End

COMBUSTION TEST

SYPHON - LCS

Next: End

COMBUSTION TEST MAX AND MINIMUM

BURNER

Next: End

COMBUSTION TEST MAX AND MINIMUM

HEAT EXCHANGER ASSEMBLY

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

Next: End

FAULT CODE 229 EA IGNITES OK

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 229 EA IGNITES OK

SYPHON - LCS

Next: End

FAULT CODE 1001 - 1008 - BATTERIES ETC

COMFORT CONTROLS

Next: End

FAULT CODE 1001 - 1008

CONTROL BOX - SKIN MID

Next: End

EXTERNAL MIXING DILUTING DHW TEMPERATURE

EXTERNAL MIXING

Next: End

BLANK FOR LITE DIAGNOSTIC

Z REDIRECT

Next: End

BLANK FOR QADAI

Z REDIRECT

Next: End

QADAI

SENSOR - TEMPERATURE (DHW)

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

HARNESS - LOW VOLTAGE

Next: End

QADAI

SENSOR 18MM (FLOW)

Next: End

QADAI

SENSOR NTC - RIGHT ANGLED (RETURN SENSOR)

Next: End

QADAI

SENSOR - NTC MAX (OVERHEAT)

Next: End

QADAI

TRANSFORMER - IGNITION

Next: End

SPARK GEN VOLTAGE QADAI

CONTROL BOX - SKIN MID

Next: End

QADAI PUMP RESISTANCE

PUMP

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

SYSTEM PRESSURE

Next: End

PUMP VOLTAGE QADAI

CONTROL BOX - SKIN MID

Next: End

FAN VOLTAGE QADAI

CONTROL BOX - SKIN MID

Next: End

QADAI

FAN

Next: End

DIVERTER VALVE VOLTAGE QADAI

CONTROL BOX - SKIN MID

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

PUMP

Next: End

RESISTANCE INCORRECT QADAI

GAS VALVE

Next: End

GAS VALVE VOLTAGE QADAI

CONTROL BOX - SKIN MID

Next: End

BURNER IGNITES BUT BAFFLES OUT OR NOISY

MIXING UNIT ASSEMBLY

Next: End

OBSERVATION BURNER IGNITION BAFFLES PRESSURE LOW

BURNER

Next: End

OBSERVATION BURNER IGNITION BAFFLES

FLUEWAYS

Next: End

SPARKING HEARD NO IGNITION

MIXING UNIT ASSEMBLY

Next: End

OBSERVATION BURNER IGNITION

BURNER

Next: End

OBSERVATION BURNER IGNITION DOES NOT IGNITE

FLUEWAYS

Next: End

IGNITES BUT DOES NOT ESTABLISH

MIXING UNIT ASSEMBLY

Next: End

OBSERVATION BURNER IGNITION DOES NOT ESTABLISH

BURNER

Next: End

SPARKING HEARD NO IGNITION FAULT CODE

MIXING UNIT ASSEMBLY

Next: End

FAULT CODE 229 EA

BURNER

Next: End

FAULT CODE 229 EA DOES NOT IGNITE

FLUEWAYS

Next: End

IGNITES BUT DOES NOT ESTABLISH FAULT CODE

MIXING UNIT ASSEMBLY

Next: End

FAULT CODE 229 EA DOES NOT ESTABLISH

BURNER

Next: End

IGNITES BUT BAFFLES OUT OR NOISY FAULT CODE

MIXING UNIT ASSEMBLY

Next: End

FAULT CODE 229 EA BAFFLES

FLUEWAYS

Next: End

QADAI

SENSOR NTC - RIGHT ANGLED (DHW INLET SENSOR)

Next: End

QADAI

SENSOR - FLOW (TURBINE)

Next: End

BOILER REMAINS LIT RADS ONLY WARM

MIXING UNIT ASSEMBLY

Next: End

FAULT CODE 229 EA 374 8C

MIXING UNIT ASSEMBLY

Next: End

DHW COOL RADS STAY COOL

MIXING UNIT ASSEMBLY

Next: End

QADAI

MOTOR - DIVERTER VALVE

Next: End

OPERATION DHW DHW COOL RADS HOT

CONTROL BOX - SKIN MID

Next: End

OPERATION DHW DHW COOL RADS HOT

HARNESS - LOW VOLTAGE

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

BOILER SETUP PARAMETERS

Next: End

OPERATION DHW TOO HOT

SENSOR - TEMPERATURE (DHW)

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT NO VOLTAGE TO DIVERTER

CONTROL BOX - SKIN MID

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

INLET PRESSURE

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

FAULT CODES

Z REDIRECT

Next: End

OBSERVATION FAN RUNS DHW SENSOR

SENSOR - TEMPERATURE (DHW)

Next: End

OBSERVATION FAN RUNS NOT FIRING FOR DHW

SENSOR - NTC MAX (OVERHEAT)

Next: End

OBSERVATION FAN RUNS

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE (FUSED SPUR)

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE INTERNAL 5A

Next: End

OBSERVATION DISPLAY ILLUMINATES ALL OFF

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BLANK DISPLAY

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION PUMP RUNS NO POWER TO DHW TURBINE

CONTROL BOX - SKIN MID

Next: End

OBSERVATION PUMP RUNS DHW TURBINE

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION FAN RUNS RETURN SENSOR

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION CH DEMAND NOT RESPONDING TO DEMAND NO PROGRAMMER

CONTROL BOX - SKIN MID

Next: End

OPERATION CH BOILER REACHES TEMP RADS DO NOT HEAT

PUMP

Next: End

OBSERVATION PUMP RUNS DHW ISOLATION

ISOLATION VALVES

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

SENSOR 18MM (FLOW)

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

SENSOR - NTC MAX (OVERHEAT)

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

SENSOR NTC - RIGHT ANGLED (RETURN SENSOR)

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP FLUE TEMP

FLUEWAYS

Next: End

OPERATION CH INSUFFICIENT HEAT OUTPUT SETTINGS

BOILER SETUP PARAMETERS

Next: End

OPERATION CH INSUFFICIENT HEAT

INLET PRESSURE

Next: End

OPERATION DHW DHW COOL RADS COLD

SYSTEM PRESSURE

Next: End

OPERATION DHW DHW RUNS HOT COLD

PUMP

Next: End

OBSERVATION PUMP OVERRUN

BOILER SETUP PARAMETERS

Next: End

OPERATION DHW INSUFFICENT HEAT NO VOLTAGE TO DIVERTER

CONTROL BOX - SKIN MID

Next: End

OPERATION DHW INSUFFICIENT HEAT

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE H11

SENSOR - TEMPERATURE (DHW)

Next: End

FAULT CODE 210 E9

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

FAULT CODE 221 E9

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 221 E9

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 233 9U

CODE PLUG

Next: End

OBSERVATION BOILER SELF CHECK NO VOLTAGE TO PUMP

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BOILER SELF CHECK

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 233 9U

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 231 FD

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 223 E2

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 240 241 286 D1 285 D9

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 240 241 286 D1 285 D9

SENSOR NTC - RIGHT ANGLED (RETURN SENSOR)

Next: End

FAULT CODE 264 C1

FAN

Next: End

FAULT CODE 239 242-256 258 259 262 263 267 272 328 F0 257 B7

Z REDIRECT

Next: End

FAULT CODE 228 F7

Z REDIRECT

Next: End

FAULT CODE H13

Z REDIRECT

Next: End

FAULT CODE 327

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 306 FA

CONTROL BOX - SKIN MID

Next: End

FAULT 228 F7

ELECTRODE

Next: End

FAULT CODE 323 A8

Next: End

FAULT CODE 278 F0

Z REDIRECT

Next: End

FAULT CODE 278 F0

SENSOR NTC - RIGHT ANGLED (RETURN SENSOR)

Next: End

FAULT CODE 278 F0 SAFETY SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 278 F0 FLOW SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 278 F0 DHW SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 375 376 E4 SENSOR NOT FITTED

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 375 376 F4

Z REDIRECT

Next: End

FAULT CODE 375 376 E4 SENSOR FITTED

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 375 376 E4 SENSOR FITTED

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 380

EXTERNAL HEAT SOURCE

Next: End

FAULT CODE 380 SENSOR FITTED

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 219 220 277 E9

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 260 STUCK IN FAULT CODE

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 237 273 C4 274

Z REDIRECT

Next: End

FAULT CODE 212

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION IGNITES BUT CUTS OUT

CONTROL BOX - SKIN MID

Next: End

DUMMY VOLTAGE SPARK GENERATOR AT PCB WITHOUT DISPLAY 2

Z REDIRECT

Next: End

DUMMY VOLTAGE SENSOR FLUE AT TEMP (NO DISPLAY) 1

Z REDIRECT

Next: End

DUMMY DIFFERENTIAL SENSOR FLOW AND SAFETY AND TEMP (NO DISPLAY) 1

Z REDIRECT

Next: End

DUMMY OBSERVATION SPARK GENERATOR OUTPUT (NO DISPLAY) 1

Z REDIRECT

Next: End

DUMMY VOLTAGE RECTIFICATION CIRCUIT (NO DISPLAY) 1

Z REDIRECT

Next: End

DUMMY OPERATION PREHEAT (NO DISPLAY) 1

Z REDIRECT

Next: End

DUMMY DIFFERENTIAL SENSOR FLOW AND SAFETY DHW ONLY (NO DISPLAY) 1

Z REDIRECT

Next: End

OPERATION DHW FLOW RATE NOT OBTAINABLE

PLATE HEAT EXCHANGER

Next: End

OPERATION DHW FLOW RATE NOT OBTAINABLE

SENSOR - FLOW (TURBINE)

Next: End

OPERATION DHW FLOW RATE NOT OBTAINABLE

FILTER - DCW

Next: End

OPERATION DHW FLOW RATE NOT OBTAINABLE

REGULATOR

Next: End

OPERATION DHW FLOW RATE NOT OBTAINABLE

BODY BRASS - SILENCER (NOZZLES)

Next: End

OPERATION DHW FLOW RATE NOT OBTAINABLE

ADAPTOR - FLOW - LIMITER

Next: End

DUMMY VOLTAGE DIVERTER VALVE AT PCB (DISTANT FUSE SPUR) 1

Z REDIRECT

Next: End

FAULT CODE 800 CC

Z REDIRECT

Next: End

FAULT CODE 800 CC

Next: End

DUMMY OBSERVATION DIVERTER MOVEMENT (DISTANT FUSE SPUR) NO CH 1

Z REDIRECT

Next: End

COMBUSTION TEST DROPS ON MINIMUM

GAS VALVE

Next: End

FAULT CODE 278 F0

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 278 F0 DHW INLET SENSOR

HARNESS - LOW VOLTAGE

Next: End

DUMMY OBSERVATION DIVERTER MOVEMENT (DISTANT FUSE SPUR) POOR CH 1

Z REDIRECT

Next: End

OBSERVATION DIVERTER MOVEMENT OFF ONLY (DISTANT FUSE SPUR) 1

Z REDIRECT

Next: End

OPERATION DHW DHW COOL RADS COLD LOW FAN SPEED

CONTROL BOX - SKIN MID

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

Next: End

OBSERVATION BURNER IGNITION NO IGNITION

INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITION NO IGNITION NO DROP

NOZZLE (INJECTOR)

Next: End

OBSERVATION BURNER IGNITION NO IGNITION NO DROP

HOSE - GAS

Next: End

OBSERVATION BURNER IGNITION NO POWER TO GAS VALVE

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION

CONTROL BOX - SKIN MID AND HARNESS ASSEMBLY

Next: End

OBSERVATION BURNER IGNITION NO PRESSURE DROP

GAS VALVE

Next: End

OBSERVATION BURNER IGNITION SPARKING NO IGNITION

NOZZLE (INJECTOR)

Next: End

OBSERVATION BURNER IGNITION NO IGNITION PRESSURE DROP

HOSE - GAS

Next: End

OBSERVATION BURNER IGNITION NO IGNITION

TRANSFORMER - IGNITION

Next: End

OBSERVATION BURNER IGNITION PRESSURE DROP SEEN

GAS VALVE

Next: End

OBSERVATION BURNER IGNITION TO GAS VALVE NO SPARKING

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OPERATION CH INSUFFICIENT HEAT

CONTROL BOX - SKIN MID

Next: End

OPERATION DHW TOO HOT

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION NO SPARKING

TRANSFORMER - IGNITION

Next: End

OBSERVATION BURNER IGNITION NO SPARKING

ELECTRODE

Next: End

OBSERVATION BURNER IGNITION NO VOLTAGE TO RECTIFICATION CIRCUIT

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION RECTIFICATION SHORTING

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION BURNER IGNITION NOT RECOGNISING RECIFICATION VOLTAGE

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION NOT ESTABLISHING LOW VOLTAGE

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION

INTERNAL TIMER

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION PUMP RUNS

CONTROL BOX - SKIN MID

Next: End

OBSERVATION BURNER IGNITION BURNER BAFFLES

NOZZLE (INJECTOR)

Next: End

OBSERVATION BURNER IGNITION BURNER BAFFLES

HOSE - GAS

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP STUCK LOW TEMP

CONTROL BOX - SKIN MID

Next: End

FURTHER INVESTIGATION FUSE PCB PUMP

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FURTHER INVESTIGATION FUSE PCB GAS VALVE

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FURTHER INVESTIGATION FUSE PCB FAN

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FURTHER INVESTIGATION

FUSE INTERNAL 5A FURTHER INVESTIGATION

Next: End

FURTHER INVESTIGATION FUSE PCB SPARK GENERATOR

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FURTHER INVESTIGATION MAINS FUSE PUMP

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FURTHER INVESTIGATION MAINS FUSE GAS VALVE

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FURTHER INVESTIGATION MAINS FUSE FAN

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FURTHER INVESTIGATION

FUSE (FUSED SPUR) FURTHER INVESTIGATION

Next: End

FURTHER INVESTIGATION MAINS FUSE SPARK GENERATOR

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OPERATION CH INSUFFICIENT HEAT

FLUEWAYS

Next: End

FAULT CODE 229 EA BURNER BAFFLES

NOZZLE (INJECTOR)

Next: End

FAULT CODE 229 EA IGNITION BURNER BAFFLES

HOSE - GAS

Next: End

FAULT CODE 229 EA BAFFLES

GAS VALVE

Next: End

FAULT CODE 229 EA NO VOLTAGE TO RECTIFICATION CIRCUIT

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 229 EA RECTIFICATION SHORTING

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 229 EA NOT RECOGNISING RECIFICATION VOLTAGE

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 229 EA NOT ESTABLISHING LOW VOLTAGE

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 229 EA NO IGNITION

INLET PRESSURE

Next: End

FAULT CODE 229 EA NO IGNITION NO DROP

NOZZLE (INJECTOR)

Next: End

FAULT CODE 229 EA NO IGNITION NO DROP

HOSE - GAS

Next: End

FAULT CODE 229 EA NO POWER TO GAS VALVE

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 229 EA

CONTROL BOX - SKIN MID AND HARNESS ASSEMBLY

Next: End

FAULT CODE 229 EA NO PRESSURE DROP

GAS VALVE

Next: End

FAULT CODE 229 EA SPARKING NO IGNITION

NOZZLE (INJECTOR)

Next: End

FAULT CODE 229 EA NO IGNITION PRESSURE DROP

HOSE - GAS

Next: End

FAULT CODE 229 EA NO IGNITION

TRANSFORMER - IGNITION

Next: End

FAULT CODE 229 EA PRESSURE DROP SEEN

GAS VALVE

Next: End

FAULT CODE 299 EA IGNITES OK

FLUEWAYS

Next: End

FAULT CODE 229 EA

NO FAULT FOUND

Next: End

FAULT CODE 229 EA IGNITES OK DROPS ON MINIMUM

GAS VALVE

Next: End

DUMMY OBSERVATION DIFFERENTIAL SAFETY AND FLOW CH ONLY (NO DISPLAY) 1

Z REDIRECT

Next: End

FAULT CODE 234 EA

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 238 F0 RESETS BUT FAULT REOCCURS

GAS VALVE

Next: End

FAULT CODE 234 EA

CONTROL BOX - SKIN MID

Next: End

OBSERVATION FAN RUNS NO RESPONSE TO DHW WITH INLET SENSOR

CONTROL BOX - SKIN MID

Next: End

OBSERVATION FAN RUNS DHW INLET SENSOR

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION FAN RUNS

EXTERNAL HEAT SOURCE

Next: End

FAULT CODE 238 F0

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 238 F0 WILL NOT RESET

HARNESS ASSEMBLY - HV & IGNITION

Next: End

FAULT CODE 260 245 EF STUCK

PUMP

Next: End

OBSERVATION CH DEMAND

INTERNAL TIMER

Next: End

FAULT CODE 271 STUCK

PUMP

Next: End

OBSERVATION CH DEMAND

Next: End

FAULT CODE 373 8C EF STUCK

PUMP

Next: End

OBSERVATION BURNER IGNITION BAFFLES

GAS VALVE

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9

PLATE HEAT EXCHANGER

Next: End

FAULT CODE 218 332 E5 222 E2 267 E9 NOT SHUTTING DOWN

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 219 220 277 E9

PLATE HEAT EXCHANGER

Next: End

FAULT CODE 219 220 277 E9 NOT SHUTTING DOWN

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 373 8C

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 373 8C

PLATE HEAT EXCHANGER

Next: End

FAULT CODE 271

PLATE HEAT EXCHANGER

Next: End

FAULT CODE 271

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION PUMP RUNS

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION

INTERNAL TIMER

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FROST PROTECTION

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK SAFETY SENSOR

HARNESS - LOW VOLTAGE

Next: End

OPERATION CH

EXPANSION VESSEL

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK STUCK IN FAULT

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES SELF CHECK FAN RUNS CONSTANT SPEED

HARNESS ASSEMBLY - HV & IGNITION

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FAN PULSES

FAN

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FAN DOES NOT RUN

FAN

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK

PUMP

Next: End

OBSERVATION PUMP RUNS INSUFFICIENT FLOW RATENO DISPLAY

PLATE HEAT EXCHANGER

Next: End

OBSERVATION PUMP RUNS INSUFFICIENT FLOW RATENO DISPLAY

SENSOR - FLOW (TURBINE)

Next: End

OBSERVATION PUMP RUNSNO DISPLAY

FILTER - DCW

Next: End

OBSERVATION PUMP RUNSNO DISPLAY

REGULATOR

Next: End

OBSERVATION PUMP RUNSNO DISPLAY

BODY BRASS - SILENCER (NOZZLES)

Next: End

OBSERVATION PUMP RUNSNO DISPLAY

ADAPTOR - FLOW - LIMITER

Next: End

OBSERVATION PUMP RUNS IGNORING DEMANDNO DISPLAY

CONTROL BOX - SKIN MID

Next: End

OBSERVATION PUMP RUNS TURBINE FAULTYNO DISPLAY

SENSOR - FLOW (TURBINE)

Next: End

NO DISPLAY

CONTROL BOX - SKIN MID (NO DISPLAY)

Next: End

OBSERVATION FAN RUNSNO DISPLAY

SENSOR NTC - RIGHT ANGLED (RETURN SENSOR)

Next: End

OBSERVATION FAN RUNS FLUE SENSORNO DISPLAY

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION FAN RUNSNO DISPLAY

EXTERNAL HEAT SOURCE

Next: End

OBSERVATION FAN RUNS NO RESPONSE TO DHW WITH INLET SENSORNO DISPLAY

CONTROL BOX - SKIN MID

Next: End

OBSERVATION FAN RUNS DHW INLET SENSORNO DISPLAY

HARNESS - LOW VOLTAGE

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

FLUEWAYS

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

NOZZLE (INJECTOR)

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

HOSE - GAS

Next: End

FAULT CODE 258 356 EH

Z REDIRECT

Next: End

OBSERVATION PUMP OVERRUN DHW

CONTROL BOX - SKIN MID

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK FLOW SENSOR

HARNESS - LOW VOLTAGE

Next: End

OPERATION PREHEAT

INTERNAL TIMER

Next: End

OPERATION PREHEAT STUCK IN ECO

CONTROL BOX - SKIN MID

Next: End

OPERATION PREHEAT NOT FIRING WITH PREHEAT DISPLAYED

CONTROL BOX - SKIN MID

Next: End

COMBUSTION TEST MAXIMUM AND MINIMUM

FLUE

Next: End

COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL - CONDENSATE COLLECTOR

Next: End

COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL - FLUE

Next: End

COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL

Next: End

OPERATION CH REACHES TEMP RADS DO NOT HEAT

DIVERTER VALVE ASSEMBLY

Next: End

COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL - CONDENSATE COLLECTOR

Next: End

COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL - FLUE

Next: End

COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL

Next: End

COMBUSTION TEST

NOZZLE (INJECTOR)

Next: End

COMBUSTION TEST

HOSE - GAS

Next: End

COMBUSTION TEST FAILS COMBUSTION

GAS VALVE

Next: End

FAULT CODE 229 EA COMBUSTION TEST FAILED

FLUE

Next: End

FAULT CODE 229 EA COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL - CONDENSATE COLLECTOR

Next: End

FAULT CODE 229 EA COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL - FLUE

Next: End

FAULT CODE 229 EA COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL

Next: End

FAULT CODE 229 EA COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL - CONDENSATE COLLECTOR

Next: End

FAULT CODE 229 EA COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL - FLUE

Next: End

FAULT CODE 229 EA COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL

Next: End

FAULT CODE 229 EA IGNITES OK FAILS COMBUSTION

GAS VALVE

Next: End

FAULT CODE 229 EA IGNITES OK

NOZZLE (INJECTOR)

Next: End

FAULT CODE 229 EA IGNITES OK

HOSE - GAS

Next: End

FAULT CODE 1001 - 1008 STUCK FAULTY

COMFORT CONTROLS

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

MOTOR - DIVERTER VALVE

Next: End

OPERATION DHW TOO COOL BOILER STAYS LIT

CONTROL BOX - SKIN MID

Next: End

SENSOR DHW

RESULT AS EXPECTED

Next: End

SENSOR FLOW

RESULT AS EXPECTED

Next: End

SENSOR RETURN

RESULT AS EXPECTED

Next: End

SENSOR SAFETY

RESULT AS EXPECTED

Next: End

SPARK GEN RESISTANCE

RESULT AS EXPECTED

Next: End

SPARK GEN VOLTAGE

RESULT AS EXPECTED

Next: End

PUMP RESISTANCE

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE

RESULT AS EXPECTED

Next: End

FAN VOLTAGE

RESULT AS EXPECTED

Next: End

FAN RESISTANCE

RESULT AS EXPECTED

Next: End

DIVERTER VALVE VOLTAGE

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE

RESULT AS EXPECTED

Next: End

FLOW TURBINE VOLTAGE

RESULT AS EXPECTED

Next: End

OBSERVATION BURNER IGNITION BAFFLES

FAN

Next: End

OBSERVATION BURNER IGNITION NO IGNITION

FAN

Next: End

OBSERVATION BURNER IGNITION DOES NOT ESTABLISH

FLUEWAYS

Next: End

FAULT CODE 229 EA NO IGNITION

FAN

Next: End

FAULT CODE 229 EA DOES NOT ESTABLISH

FLUEWAYS

Next: End

FAULT CODE 229 EA BAFFLES

FAN

Next: End

SENSOR DHW INLET

RESULT AS EXPECTED

Next: End

DIVERTER VALVE RESISTANCE

RESULT AS EXPECTED

Next: End

OPERATION DHW DHW COOL RADS HOT

DIVERTER VALVE ASSEMBLY

Next: End

OPERATION DHW DHW COOL RADS HOT

MOTOR - DIVERTER VALVE

Next: End

OBSERVATION FAN RUNS FLUE SENSOR

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION DISPLAY ILLUMINATES

Next: End

OBSERVATION DISPLAY ILLUMINATES MAINS FUSE

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES INTERNAL FUSE

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES BLANK DISPLAY

SENSOR - FLOW (TURBINE)

Next: End

OBSERVATION PUMP RUNS INSUFFICIENT FLOW RATE

PLATE HEAT EXCHANGER

Next: End

OBSERVATION PUMP RUNS INSUFFICIENT FLOW RATE

SENSOR - FLOW (TURBINE)

Next: End

OBSERVATION PUMP RUNS

FILTER - DCW

Next: End

OBSERVATION PUMP RUNS

REGULATOR

Next: End

OBSERVATION PUMP RUNS

BODY BRASS - SILENCER (NOZZLES)

Next: End

OBSERVATION PUMP RUNS

ADAPTOR - FLOW - LIMITER

Next: End

OBSERVATION PUMP RUNS DOES NOT RECOGNISING DEMAND

CONTROL BOX - SKIN MID

Next: End

OBSERVATION PUMP RUNS IGNORING DEMAND

CONTROL BOX - SKIN MID

Next: End

OBSERVATION PUMP RUNS TURBINE FAULTY

SENSOR - FLOW (TURBINE)

Next: End

OBSERVATION FAN RUNS

SENSOR NTC - RIGHT ANGLED (RETURN SENSOR)

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

OPERATION CH INSUFFICIENT HEAT

NOZZLE (INJECTOR)

Next: End

OPERATION CH INSUFFICIENT HEAT

HOSE - GAS

Next: End

OBSERVATION PUMP OVERRUN CH

CONTROL BOX - SKIN MID

Next: End

OBSERVATION PUMP OVERRUN DOES NOT OVERRUN

CONTROL BOX - SKIN MID

Next: End

OPERATION DHW INSUFFICIENT HEAT

MOTOR - DIVERTER VALVE

Next: End

OPERATION DHW INSUFFICIENT HEAT

DIVERTER VALVE ASSEMBLY

Next: End

FAULT CODE H11

CONTROL BOX - SKIN MID

Next: End

FAULT CODE H11

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 210 E9

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 210 E9

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 210 E9

OVERHEAT - FLUE

Next: End

FAULT CODE 210 E9

FLUEWAYS

Next: End

FAULT 210 E9

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

FAULT CODE 221 E9

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 231 FD

Z REDIRECT

Next: End

OBSERVATION BOILER SELF CHECK

PUMP

Next: End

FAULT CODE 233 9U

CONTROL BOX - SKIN MID

Next: End

FAULT CODE 223 E2

CONTROL BOX - SKIN MID

Next: End

FAULT CODE D4 (STATUS 271) DISPLAYED SHORTLY AFTER IGNITION

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p1482

ALTERNATIVE TO VOLTAGE SPARK GENERATOR AT PCB

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1495

ALTERNATIVE TO OBSERVATION FAULT CODE AT SHUTDOWN

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1498

ALTERNATIVE TO TEMPERATURE DIFFERENTIAL SAFETY AND FLOW

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1510

ALTERNATIVE TO OBSERVATION RECTIFICATION CURRENT

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1516

ALTERNATIVE TO OBSERVATION SPARK GENERATOR OUTPUT

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1552

ALTERNATIVE TO OPERATION PREHEAT

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1574

ALTERNATIVE TO TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1619

FLOW SENSOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p1677

FILTER BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p1679

FLOW REGULATOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p1681

NOZZLES BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p1683

ADAPTOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p1685

ALTERNATIVE TO VOLTAGE DIVERTER VALVE AT PCB

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1704

ALTERNATIVE TO OBSERVATION DIVERTER MOVEMENT IN OP CH RADS DO NOT HEAT

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1840

COMBUSTION TEST FAILED

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p3175

BOILER DROPS OUT ON MINIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p1849

ALTERNATIVE TO OBSERVATION DIVERTER MOVEMENT

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1867

ALTERNATIVE TO OBSERVATION DIVERTER MOVEMENT IN OP CH INSUFF HEAT

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p1871

SPARKING HEARD BUT NO IGNITION

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p2063

NO PRESSURE DROP OBSERVED

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p2079

PRESSURE DROPS BELOW 16 5MB

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p2081

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2084

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2086

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2100

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2102

NO SPARKING HEARD

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p2120

APPROX 90V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p2186

VOLTAGE LESS THAN 30V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p2188

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p2172

BOILER ATTEMPTS TO FIRE AFTER SELF CHECK

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p2294

PUMP RUNS CONTINUOUSLY AFTER SELF CHECK

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p2308

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p2316

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2332

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2334

SPARKING HEARD BUT NO IGNITION OR IGNITION INTERMITTENT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION FAULT CODE 229

Next: p2533

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH OR ESTABLISHES INTERMITTENTLY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION FAULT CODE 229

Next: p2535

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p2537

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2553

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2555

APPROX 90V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p2573

VOLTAGE LESS THAN 30V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p2575

NO PRESSURE DROP OBSERVED

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p2601

PRESSURE DROPS BELOW 16 5MB

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p2603

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2606

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2608

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2622

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p2624

COMBUSTION TEST FAILED

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p3206

BOILER DROPS OUT ON MINIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p2644

ALTERNATIVE TO TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CHARACTERISTIC TEST FROM ALTERNATIVE TEST LIST USED IF DISPLAY NOT AVAILABLE

Next: p2658

FLOW RATE NOT OBTAINABLE

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1671

BOILER CUTS OUT OR HOT WATER RUNS HOT COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p740

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p3012

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK NO DISPLAY

Next: p3014

FAN PULSES 3 TIMES AT INCREASING SPEEDS THEN RUNS FOR 2 MINUTES

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK NO DISPLAY

Next: p3016

FAN RUNS AT A CONSTANT SPEED FOR 2 MINUTES

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK NO DISPLAY

Next: p3018

BOILER ATTEMPTS TO FIRE AFTER SELF CHECK

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p3020

PUMP RUNS CONTINUOUSLY AFTER SELF CHECK

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p3022

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CH

Next: !p305

DHW TOO COOL, RADIATORS HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p307

BOILER REACHES TEMPERATURE, RADIATORS DO NOT HEAT OR ONLY GET WARM

CHARACTERISTIC TEST FROM OPERATION CH

Next: p309

FLOW SENSOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p3084

FILTER BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p3086

FLOW REGULATOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p3088

NOZZLES BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p3090

ADAPTOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p3092

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p3139

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p3141

PUMP DOES NOT OVERRUN ON DHW

CHARACTERISTIC TEST FROM OBSERVATION PUMP OVERRUN

Next: !p3159

DIVERTER DOES NOT MOVE ON EITHER TEST

CHARACTERISTIC TEST FROM OBSERVATION DIVERTER MOTOR MOVEMENT

Next: p317

DISPLAY CHANGES TO ECO MODE WITH CLOCK SYMBOL

CHARACTERISTIC TEST FROM OPERATION PREHEAT

Next: p3164

APPLIANCE WILL NOT LEAVE ECO MODE

CHARACTERISTIC TEST FROM OPERATION PREHEAT

Next: !p3172

DISPLAY SHOWS PREHEAT BUT DOES NOT FIRE

CHARACTERISTIC TEST FROM OPERATION PREHEAT

Next: !p3174

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3180

DIVERTER ONLY MOVES WHEN REMOVED FROM HOUSING

CHARACTERISTIC TEST FROM OBSERVATION DIVERTER MOTOR MOVEMENT

Next: !p319

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3182

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3184

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3192

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3194

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3196

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p3199

GAS SUPPLY TUBE BLOCKED RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3201

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3211

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3213

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3215

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3223

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3225

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3227

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p3230

GAS SUPPLY TUBE BLOCKED RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p3232

BOILER SHUTS DOWN BEFORE REACHING TEMPERATURE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p327

DHW TOO COOL, RADS COOL, BOILER STAYS LIT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p390

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p380

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p951

DISPLAY SHOWS ZERO FLOW RATE

CHARACTERISTIC TEST FROM OBSERVATION DHW MIN FLOW RATE

Next: p596

DISPLAY SHOWS FLOW RATE LESS THAN 2 LITRES A MINTUE

CHARACTERISTIC TEST FROM OBSERVATION DHW MIN FLOW RATE

Next: p673

FLOW SENSOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p586

FILTER BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p588

FLOW REGULATOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p590

NOZZLES BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p592

ADAPTOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION FLOW COMPONENTS

Next: !p594

BOILER REMAINS LIT BUT BOILER AND RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM OPERATION CH

Next: p720

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p736

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p738

PUMP OVERRUNS EXCESSIVELY

CHARACTERISTIC TEST FROM OBSERVATION PUMP OVERRUN

Next: p777

PUMP OVERRUNS FOR LESS THAN 3 MINUTES ON CH OR DOES NOT OVERRUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP OVERRUN

Next: !p781

DIVERTER DOES NOT MOVE ON EITHER TEST

CHARACTERISTIC TEST FROM OBSERVATION DIVERTER MOTOR MOVEMENT

Next: p794

DIVERTER ONLY MOVES WHEN REMOVED FROM HOUSING

CHARACTERISTIC TEST FROM OBSERVATION DIVERTER MOTOR MOVEMENT

Next: !p800

FLUE TEMPERATURE REACHES APPROX 95°C OR HIGHER

CHARACTERISTIC TEST FROM TEMPERATURE EXHAUST GAS (FAULT CODE)

Next: !p895

RETURNS TO FAULT CODE, FLUE TEMPERATURE BELOW 95°C

CHARACTERISTIC TEST FROM TEMPERATURE EXHAUST GAS (FAULT CODE)

Next: !p897

24/04/2023 10:56:28 2303_2_50_1 21/06/2023 13:18:01

27/04/2023 13:30:24

Next: End

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p1003, f1004

RESISTANCE HARNESS RETURN SENSOR

DISCONNECT PLUG FROM

Next: !p1005, !f1006

RESISTANCE HARNESS FAN

DISCONNECT FAN CONNECTOR FROM FAN

Next: !p1010, !f1009

OBSERVATION BOILER RESET INTERNAL ERROR

Next: !p1016, !f1017

OBSERVATION BOILER RESET FAULT 228 F7

Next: !p1020, f1056

INFORMATION SERVICE REMINDER

H13 IS THE CODE TO I

Next: !p1035, !f1036

INSPECTION RESET SWITCH

Next: !p1043, !f1055

INSPECTION FLUE

Next: p1047, !f1048

INSPECTION RECTIFICATION LEADS

{GAINPCBACS}
REMOVE BOILER CASING
DISCONNECT THE AIR INTAKE

Next: p1061, !f1058

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1163, !f1162

OBSERVATION BOILER RESET FAULT 278 F0

ENSURE APPLIANCE IS COOL

Next: !p1269, f1270

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p1271, f1274

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: !p1282, !f1283

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p1280, !f1281

RESISTANCE HARNESS RETURN SENSOR

DISCONNECT PLUG FROM

Next: !p1278, !f1279

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: !p1285, !f1286

RESISTANCE HARNESS DHW INLET SENSOR

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p1298, !f1289

OBSERVATION IS DHW INLET SENSOR FITTED

Next: p1299, f1300

OBSERVATION BOILER RESET 375 376 F4

ENSURE APPLIANCE IS COOL

Next: !p1304, f1287

RESISTANCE SENSOR DHW INLET

DISCONNECT PLUG FROM DHW INLET SENSOR

Next: !p1307, !f1308

OBSERVATION IS DHW INLET SENSOR FITTED

Next: p1314, !f1311

RESISTANCE SENSOR DHW INLET

DISCONNECT PLUG FROM DHW INLET SENSOR

Next: !p1318, !f1319

RESISTANCE SENSOR SAFETY AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p1368, f1369

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p1370, !f1371

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p1392, f1393

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: !p1394, !f1414

INSPECTION PRESSURE SYSTEM

Next: p2715, !f1418

OBSERVATION BOILER RESET FAULT 237 273 C4 274

Next: !p1425, !f1426

INSPECTION PRESSURE SYSTEM

Next: p1435, !f1442

INSPECTION PRESSURE SYSTEM

Next: p2726, !f1448

INFORMATION APPLIANCE OVERHEAT

DUE TO THE DESIGN OF

Next: p1463, !f1464

OBSERVATION BOILER RESET FAULT 800 CC

Next: !p1717, f1710

OBSERVATION IS OUTDOOR TEMPERATURE SENSOR FITTED

GAIN ACCESS TO LOWER PCB PANEL

Next: p1711, !f1718

RESISTANCE SENSOR DHW INLET

DISCONNECT PLUG FROM DHW INLET SENSOR

Next: !p1864, !f1865

INSPECTION CONDENSATE PIPE

Next: p2066, !f2067

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p2089, f2090

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p2091, !f2092

RESISTANCE IGNITION LEAD

DISCONNECT THE IGNIT

Next: !p2105, !f2106

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p2123, !f2124

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}

Next: p2165, !f2166

INSPECTION FLUE

Next: p3380, !f2176

RESISTANCE RECTIFICATION ELECTRODE TO EARTH

DISCONNECT LEAD FROM RECTIFICATION ELECTRODE

Next: !p2191, !f2192

OBSERVATION DISCONNECT CH LINK

REMOVE THE LINK BETWEEN L AND LR FOR CH
ENSURE CENTRAL HEATING TURNED OFF

Next: !p2303, !f2304

INSPECTION FLUE

Next: p3346, !f2322

RESISTANCE MAINS IN FURTHER INVESTIGATION

GAIN ACCESS TO THE LOWER PANEL OF THE PCB

Next: p2389, !f2406

RESISTANCE PUMP FURTHER INVESTIGATION

DISCONNECT CONNECTOR FROM PUMP

Next: !p2392, !f2393

RESISTANCE GAS VALVE FURTHER INVESTIGATION

DISCONNECT PLUG FROM GAS VALVE

Next: !p2396, !f2397

RESISTANCE FAN FURTHER INVESTIGATION

DISCONNECT CONNECTOR FROM FAN

Next: !p2400, !f2401

RESISTANCE SPARK GENERATOR FURTHER INVESTIGATION

DISCONNECT CONNECTOR FROM SPARK GENERATOR

Next: !p2404, !f2405

RESISTANCE MAINS IN FURTHER INVESTIGATION

GAIN ACCESS TO THE LOWER PANEL OF THE PCB

Next: p2408, !f2425

RESISTANCE PUMP FURTHER INVESTIGATION

DISCONNECT CONNECTOR FROM PUMP

Next: !p2411, !f2412

RESISTANCE GAS VALVE FURTHER INVESTIGATION

DISCONNECT PLUG FROM GAS VALVE

Next: !p2415, !f2416

RESISTANCE FAN FURTHER INVESTIGATION

DISCONNECT CONNECTOR FROM FAN

Next: !p2419, !f2420

RESISTANCE SPARK GENERATOR FURTHER INVESTIGATION

DISCONNECT CONNECTOR FROM SPARK GENERATOR

Next: !p2423, !f2424

INSPECTION FLUE

Next: p3442, !f2510

OBSERVATION BURNER IGNITION FAULT CODE 229

ENSURE APPLIANCE IS SET TO ECO MODE

Next: p2531, ?2532, ?2534, ?2536

INSPECTION FLUE

Next: p3423, !f2543

INSPECTION FLUE

Next: p3410, !f2563

RESISTANCE RECTIFICATION ELECTRODE TO EARTH

DISCONNECT LEAD FROM RECTIFICATION ELECTRODE

Next: !p2578, !f2579

INSPECTION CONDENSATE PIPE

Next: p2588, !f2589

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p2611, f2612

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p2613, !f2614

RESISTANCE IGNITION LEAD

DISCONNECT THE IGNIT

Next: !p2627, !f2628

INSPECTION FLUE

Next: p3449, !f2634

OBSERVATION BOILER RESET FAULT 234

Next: p2667, !f2687

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p2670, !f2671

OBSERVATION BOILER RESET FAULT 238 F0

Next: p2708, f2684

INSPECTION HARNESS GAS VALVE

Next: !p2685, !f2686

RESISTANCE SENSOR DHW INLET AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p2693, f2694

RESISTANCE SENSOR DHW INLET

DISCONNECT PLUG FROM DHW INLET SENSOR

Next: !p2695, !f2696

VOLTAGE CH DEMAND INTO BOILER

GAIN ACCESS TO LOWER PCB PANEL

Next: p646, f271

VOLTAGE CH DEMAND OUT OF BOILER

Next: !p275, !f276

RESISTANCE GAS VALVE TO EARTH

DISCONNECT PLUG FROM GAS VALVE

Next: !p2713, !f2714

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p2722, !f2725

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p2744, !f2745

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p2765, !f2766

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2840, !f2841

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2854, !f2855

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2865, !f2866

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2870, !f2871

OBSERVATION DISCONNECT CH LINK

REMOVE THE LINK BETWEEN L AND LR FOR CH
ENSURE CENTRAL HEATING TURNED OFF

Next: !p3037, !f3038

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: !p3160, !f3161

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p3047, !f3048

RESISTANCE GAS VALVE TO EARTH

DISCONNECT PLUG FROM GAS VALVE

Next: !p3053, !f3054

OBSERVATION DHW MIN FLOW RATE (NO DISPLAY)

Next: p3075, f3076

INSPECTION ISOLATION VALVE DHW

Next: p3077, !f3078

VOLTAGE FLOW TURBINE OUT OF BOILER

Next: p3095, !f3096

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p3101, f3102

RESISTANCE HARNESS RETURN SENSOR

DISCONNECT PLUG FROM

Next: !p3103, !f3104

RESISTANCE SENSOR FLUE

DISCONNECT WIRES FROM FLUE SENSOR

Next: !p3113, !f3114

RESISTANCE SENSOR DHW INLET AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p3119, f3120

RESISTANCE SENSOR DHW INLET

DISCONNECT PLUG FROM DHW INLET SENSOR

Next: !p3121, !f3122

INSPECTION FLUE

Next: p3454, !f3127

VOLTAGE MAINS POWER IN FAULT CODE

GAIN ACCESS TO THE LOWER PANEL OF THE PCB

Next: p3153, !f3145

INSPECTION FLUE SEALS

Next: !p3178, ?3179, ?3181, ?3183

INSPECTION FLUE SEALS

Next: !p3209, ?3210, ?3212, ?3214

INFORMATION COMFORT CONTROLS

Next: p3236, !f3235

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: !p3248, !f3249

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: !p3252, !f3254

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p3257, !f3258

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p3261, !f3262

RESISTANCE SPARK GENERATOR (QADAI)

DISCONNECT CONNECTOR FROM SPARK GENERATOR

Next: !p3267, !f3268

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}

Next: !p3269, !f3270

RESISTANCE PUMP (QADAI)

DISCONNECT CONNECTOR FROM PUMP

Next: !p3287, !f3288

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p3289, !f3290

RESISTANCE FAN (QADAI)

DISCONNECT CONNECTOR FROM FAN

Next: !p3293, !f3294

VOLTAGE FAN SELF CHECK

{GAINPCBACS}

Next: !p3291, !f3292

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}
DISCONNECT PLUG FROM DIVERTER VALVE AND MAKE SAFE

Next: !p3295, !f3296

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p3297, !f3301

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: !p3302, !f3303

VOLTAGE FLOW TURBINE INTO BOILER

{GAINPCBACS}

Next: !p3304, !f3441

RESISTANCE SENSOR DHW INLET

DISCONNECT PLUG FROM DHW INLET SENSOR

Next: !p3438, !f3439

RESISTANCE DIVERTER VALVE AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: !p3463, !f3464

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}
DISCONNECT PLUG FROM DIVERTER VALVE AND MAKE SAFE

Next: p360, !f361

OBSERVATION DHW MIN FLOW RATE

Next: !p595, ?579, ?581

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p2042, f603

RESISTANCE SENSOR FLUE

DISCONNECT WIRES FROM FLUE SENSOR

Next: !p521, !f522

OBSERVATION DOES APPLIANCE RUN SELF CHECK

REMOVE THE OUTER CASING

Next: p549, f550

VOLTAGE MAINS POWER IN

GAIN ACCESS TO THE LOWER PANEL OF THE PCB

Next: p551, f552

RESISTANCE FUSE (MAINS FUSE)

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p553, f554

FURTHER INVESTIGATION MAINS FUSE

Next: !p555, !f556

FURTHER INVESTIGATION FUSE PCB

Next: !p559, !f560

VOLTAGE FLOW TURBINE OUT OF BOILER

Next: p599, !f600

RESISTANCE HARNESS RETURN SENSOR

DISCONNECT PLUG FROM

Next: !p606, !f607

TEMPERATURE EXHAUST GAS

CH TEMPERATURE CONTR

Next: !p716, !f718

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: !p882, !f883

RESISTANCE SENSOR FLUE AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: !p888, f889

RESISTANCE SENSOR FLUE

DISCONNECT WIRES FROM FLUE SENSOR

Next: !p890, !f891

OBSERVATION BOILER RESET FAULT 231

Next: !p939, !f985

INSPECTION CODE PLUG

{GAINPCBACS}

Next: p943, !f944

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p994, f997

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: !p1000, !f1001

INSPECTION CONDENSATE PIPE

Next: p1049, !f1050

PRESSURE TIGHTNESS TEST

Next: p1052, !f1051

PRESSURE STANDING RETURN

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT

Next: !p1054, !f1053

OBSERVATION DISCONNECT RECTIFICATION LEADS

DISCONNECT THE RECTI

Next: p1063, !f1066

INSPECTION CONDENSATE PIPE

Next: !p1064, !f1065

DISCONNECT FW100 CONTROLS

DISCONNECT FW100 OR

Next: !p1164, !f1165

RESISTANCE SENSOR SAFETY AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p1272, f1275

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p1273, f1276

RESISTANCE SENSOR DHW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p2150, f1277

RESISTANCE SENSOR DHW INLET AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p1305, f1306

TEMPERATURE DHW INLET

ATTACH TEMPERATURE CLAMP TO DHW INLET PIPE

Next: !p1316, f1317

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL

Next: p1372, !f1373

INFORMATION APPLIANCE OVERHEAT

DUE TO THE DESIGN OF

Next: p1374, !f1375

INSPECTION PRESSURE SYSTEM

Next: p1376, !f1377

PUMP LIMPET TEST

Next: p1378, !f1379

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p2851, !f1381

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL

Next: p1396, !f1397

INFORMATION APPLIANCE OVERHEAT

DUE TO THE DESIGN OF

Next: p1398, !f1399

INSPECTION PRESSURE SYSTEM

Next: p1400, !f1401

PUMP LIMPET TEST

Next: p1402, !f1403

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p1404, !f1415

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW

DHW TEMPERATURE CONTROL TO MAX

Next: p2835, f2839

PUMP LIMPET TEST

Next: p1419, !f1420

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: !p1421, !f1422

PUMP LIMPET TEST

Next: p1436, !f1441

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p1437, !f1438

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p1439, !f1440

PUMP LIMPET TEST

Next: p1445, !f1449

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p1446, !f1450

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p2867, !f1451

INSPECTION PRESSURE SYSTEM

Next: p2748, !f1466

PUMP LIMPET TEST

Next: p1467, !f1468

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p1469, !f1470

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p1471, !f1472

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW

DHW TEMPERATURE CONTROL TO MAX

Next: p2861, f2862

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p1483, !f1486

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: !p1484, !f1485

VOLTAGE SPARK GENERATOR AT PCB (NO DISPLAY)

{GAINPCBACS}

Next: !p1497, !f1496

VOLTAGE SENSOR FLUE AT TEMP (NO DISPLAY)

<

Next: !p1503, !f1504

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW (NO DISPLAY)

<

Next: !p1513, !f1514

VOLTAGE RECTIFICATION CIRCUIT (NO DISPLAY)

{GAINPCBACS}

Next: p1559, !f1518

OBSERVATION SPARK GENERATOR OUTPUT (NO DISPLAY)

<

Next: !p1553, !f1554

RESISTANCE RECTIFICATION LEAD (NO DISPLAY)

{GAINPCBACS}

Next: !p1563, !f1561

OPERATION PREHEAT (NO DISPLAY)

<

Next: !p1575, !f1576

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW (NO DISPLAY)

<

Next: !p1670, !f1621

INSPECTION ISOLATION VALVE DHW

Next: p1890, !f1673

INSPECTION FLOW COMPONENTS

HOT WATER CIRCUIT ISOLATED AND DRAINED

Next: !p1674, ?1676, ?1678, ?1680, ?1682, ?1684

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: p1932, !f1695

VOLTAGE DIVERTER VALVE AT PCB (DISTANT FUSE SPUR)

{GAINPCBACS}
DISC

Next: !p1715, !f1716

DISCONNECT OUTDOOR SENSOR

DISCONNECT THE PLUG FOR THE OUTDOOR TEMPERATURE SENSOR (BLUE CONNECTOR) AND MAKE SAFE

Next: !p1719, !f1720

OBSERVATION DIVERTER MOVEMENT (DISTANT FUSE SPUR) NO CH

DISCONNECT THE CONNECTOR TO THE GAS VALVE AND MAKE SAFE

Next: !p1841, !f1842

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p1850, !f1851

RESISTANCE SENSOR DHW INLET AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p1863, f1862

OBSERVATION DIVERTER MOVEMENT OFF ONLY (DISTANT FUSE SPUR)

DISCONNECT THE CONNE

Next: !p1889, !f1888

OBSERVATION DIVERTER MOVEMENT (DISTANT FUSE SPUR) POOR CH

DISCONNECT THE CONNECTOR TO THE GAS VALVE AND MAKE SAFE

Next: !p1872, !f1873

OBSERVATION FLOW RATE INTO BOILER

Next: p583, !f1887

OBSERVATION FLOW RATE INTO BOILER

Next: p1672, !f1904

OBSERVATION IS DHW INLET SENSOR FITTED

Next: p1925, !f1924

TEMPERATURE DHW INLET

ATTACH TEMPERATURE CLAMP TO DHW INLET PIPE

Next: !p2697, f2692

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW

DHW TEMPERATURE CONTROL TO MAX

Next: !p1933, !f1934

TEMPERATURE INTEGRAL BYPASS

ATTACH TEMPERATURE PROBE TO CH FLOW PIPE

Next: !p2040, !f2041

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p509, !f2060

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p2064, f2065

PRESSURE GAS INLET AND DROP

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p2076, ?2078, ?2080

INSPECTION FLUE

Next: p3363, !f2069

INSPECTION FAN BEARING PLATE

Next: p3375, !f2071

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p2095, !f2096

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p2082, ?2083, ?2085

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p2087, f2088

RESISTANCE HARNESS GAS VALVE

DISCONNECT THE PLUG FROM THE GAS VALVE

Next: !p2093, !f2094

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p2097, ?2099, ?2101

OBSERVATION SPARK GENERATOR OUTPUT

REMOVE THE AIR INTAK

Next: p2103, f2104

INSPECTION ELECTRODE ASSEMBLY

SLIDE THE SPARK GENE

Next: !p2107, !f2108

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p2157, f2122

OBSERVATION IS DHW INLET SENSOR FITTED

Next: p1861, !f2156

OBSERVATION DISCONNECT SPARK ELECTRODE LEAD

REMOVE THE AIR INTAK

Next: p2169, f2164

RESISTANCE HARNESS PCB TO SPARK GENERATOR

DISCONNECT PLUG FROM THE SPARK GENERATOR

Next: !p2167, !f2168

RESISTANCE IGNITION LEAD (OPEN CIRCUIT CHECK)

DISCONNECT THE IGNIT

Next: !p2170, !f2199

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p2173, f2174

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p2181, !f2182

INSPECTION FAN BEARING PLATE

Next: p3390, !f2178

VOLTAGE RECTIFICATION CIRCUIT

{GAINPCBACS}
ATTACH A CROCODILE CLIP TO THE RECTIFICATION LEAD

Next: p2183, ?2185, ?2187

RESISTANCE RECTIFICATION LEAD

{GAINPCBACS}
DISC

Next: p2195, !f2196

RESISTANCE HARNESS RECTIFICATION GROUND

DISCONNECT X5 FROM THE PCB
DISCONNECT THE FLAME SENSE LEAD FROM THE SAFETY SENSOR

Next: !p2193, !f2194

RESISTANCE RECTIFICATION CIRCUIT TO EARTH

{GAINPCBACS}
DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p2189, f2190

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p2197, !f2198

TEMPERATURE FLOW (BOILER FIRING)

REMOVE AIR INTAKE FROM APPLIANCE

Next: p2295, !f2296

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p2297, !f2298

OBSERVATION DISCONNECT FLOW TURBINE (DEMAND CHECK)

DISCONNECT FLOW TURBINE FROM ITS INLINE CONNECTOR AND MAKE SAFE
ENSURE CENTRAL HEATING TURNED OFF

Next: p2299, !f2300

OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p2301, f2302

VOLTAGE CH DEMAND INTO BOARD (NO DEMAND)

GAIN ACCESS TO LOWER PCB PANEL
ENSURE CENTRAL HEATING TURNED OFF

Next: !p2305, !f2306

TEMPERATURE FLOW (PUMP RUNNING)

REMOVE AIR INTAKE FROM APPLIANCE

Next: p2309, !f2310

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p2311, !f2312

RESISTANCE FROST PROTECTION

GAIN ACCESS TO LOWER PCB PANEL

Next: !p2313, !f2314

INSPECTION CONDENSATE PIPE

Next: p2317, !f2318

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p2319, f2320

INSPECTION FLUE

Next: p2327, !f2328

INSPECTION FAN BEARING PLATE

Next: p3358, !f2324

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p2777, ?2331, ?2333

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2340, !f2341

INSPECTION CH TEMP SETTING

CH TEMPERATURE CONTROL KNOB SET TO MAX

Next: p731, !f2364

RESISTANCE PUMP AND HARNESS FURTHER INVESTIGATION

{GAINPCBACS}
DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p2390, f2391

RESISTANCE GAS VALVE AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p2394, f2395

RESISTANCE FAN AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X3 FROM THE PCB

Next: p2398, f2399

RESISTANCE SPARK GENERATOR AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X3 AND FROM THE PCB

Next: !p2402, f2403

RESISTANCE PUMP AND HARNESS FURTHER INVESTIGATION

{GAINPCBACS}
DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p2409, f2410

RESISTANCE GAS VALVE AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p2413, f2414

RESISTANCE FAN AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X3 FROM THE PCB

Next: p2417, f2418

RESISTANCE SPARK GENERATOR AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X3 AND FROM THE PCB

Next: !p2421, f2422

PRESSURE FAN MAX RATE

ATTACH FGA TO FAN PR

Next: p732, f2499

INSPECTION FAN BEARING PLATE

Next: p2501, !f2505

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p2502, !f2503

PRESSURE FAN MAX RATE

ATTACH FGA TO FAN PR

Next: p2631, f2632

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p2586, f2587

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p2560, f2561

INSPECTION CONDENSATE PIPE

Next: p2538, !f2539

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p2540, f2541

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p2548, !f2549

INSPECTION FAN BEARING PLATE

Next: p3433, !f2545

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p2550, ?2552, ?2554

INSPECTION FLUE

Next: p2556, !f2557

INSPECTION HOUSING BURNER

REMOVE THE BURNER HOUSING FROM THE BOILER ASSEMBLY
REMOVE THE SILENCER FROM THE BURNER HOUSING

Next: !p2558, !f2559

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p2568, !f2569

INSPECTION FAN BEARING PLATE

Next: p3420, !f2565

VOLTAGE RECTIFICATION CIRCUIT

{GAINPCBACS}
ATTACH A CROCODILE CLIP TO THE RECTIFICATION LEAD

Next: p2570, ?2572, ?2574

RESISTANCE RECTIFICATION LEAD

{GAINPCBACS}
DISC

Next: p2582, !f2583

RESISTANCE HARNESS RECTIFICATION GROUND

DISCONNECT X5 FROM THE PCB
DISCONNECT THE FLAME SENSE LEAD FROM THE SAFETY SENSOR

Next: !p2580, !f2581

RESISTANCE RECTIFICATION CIRCUIT TO EARTH

{GAINPCBACS}
DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p2576, f2577

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p2584, !f2585

PRESSURE GAS INLET AND DROP

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p2598, ?2600, ?2602

INSPECTION FLUE

Next: p3393, !f2591

INSPECTION FAN BEARING PLATE

Next: p3405, !f2593

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p2617, !f2618

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p2604, ?2605, ?2607

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p2609, f2610

RESISTANCE HARNESS GAS VALVE

DISCONNECT THE PLUG FROM THE GAS VALVE

Next: !p2615, !f2616

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p2619, ?2621, ?2623

OBSERVATION SPARK GENERATOR OUTPUT

REMOVE THE AIR INTAK

Next: p2625, f2626

INSPECTION ELECTRODE ASSEMBLY

SLIDE THE SPARK GENE

Next: !p2629, !f2630

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p2637, !f2638

INSPECTION FAN BEARING PLATE

Next: !p2635, !f2636

COMBUSTION TEST MAX AND MINIMUM

Next: !p2639, ?2641, ?2643

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p2645, !f2646

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH (NO DISPLAY)

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Next: !p2665, !f2660

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p2688, f2669

INSPECTION WATER INGRESS GAS VALVE AND PCB

Next: p2709, !f2710

RESISTANCE GAS VALVE AND HARNESS TO EARTH

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p2711, f2712

OBSERVATION PUMP RUNS (FAULT CODE)

Next: p1417, f2721

DISCONNECT INTERNAL CONTROLS CH

DISCONNECT THE INTEG

Next: !p273, !f274

RESISTANCE HARNESS PUMP

DISCONNECT THE PLUG FROM THE PUMP

Next: !p2723, !f2724

OBSERVATION PUMP RUNS (FAULT CODE)

Next: p1444, f2743

RESISTANCE HARNESS PUMP

DISCONNECT THE PLUG FROM THE PUMP

Next: !p2746, !f2747

OBSERVATION PUMP RUNS

ENSURE APPLIANCE IS SET TO ECO MODE
DHW TEMPERATURE CONTROL TO MAX

Next: p1465, f2764

RESISTANCE HARNESS PUMP

DISCONNECT THE PLUG FROM THE PUMP

Next: !p2767, !f2768

INSPECTION HOUSING BURNER

REMOVE THE BURNER HOUSING FROM THE BOILER ASSEMBLY
REMOVE THE SILENCER FROM THE BURNER HOUSING

Next: p2778, !f2779

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p2780, !f2781

PUMP LIMPET TEST

Next: p3123, !f2834

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2842, !f2843

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW

DHW TEMPERATURE CONTROL TO MAX

Next: p2852, f2853

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2856, !f2857

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2863, !f2864

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW

DHW TEMPERATURE CONTROL TO MAX

Next: p2868, f2869

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW CH

CH TEMPERATURE CONTROL TO MAX

Next: !p2872, !f2873

OBSERVATION BOILER SELF CHECK NO DISPLAY

ENSURE CENTRAL HEATING TURNED OFF

Next: p3010, ?3011, ?3013, ?3015, ?3017, ?3019, ?3021

INFORMATION SET BOILER TO ECO

BECAUSE IT IS NOT PO

Next: p3071, !f3072

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p3067, !f3068

INSPECTION CODE PLUG

{GAINPCBACS}

Next: p3059, !f3060

VOLTAGE FAN SELF CHECK

{GAINPCBACS}

Next: p3055, !f3056

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p3041, f3042

TEMPERATURE FLOW (BOILER FIRING)

REMOVE AIR INTAKE FROM APPLIANCE

Next: p3029, !f3030

TEMPERATURE FLOW (PUMP RUNNING)

REMOVE AIR INTAKE FROM APPLIANCE

Next: p3023, !f3024

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p3025, !f3026

RESISTANCE FROST PROTECTION

GAIN ACCESS TO LOWER PCB PANEL

Next: !p3027, !f3028

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p3031, !f3032

OBSERVATION DISCONNECT FLOW TURBINE (DEMAND CHECK)

DISCONNECT FLOW TURBINE FROM ITS INLINE CONNECTOR AND MAKE SAFE
ENSURE CENTRAL HEATING TURNED OFF

Next: p3033, !f3034

OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p3035, f3036

VOLTAGE CH DEMAND INTO BOARD (NO DEMAND)

GAIN ACCESS TO LOWER PCB PANEL
ENSURE CENTRAL HEATING TURNED OFF

Next: !p3039, !f3040

RESISTANCE SENSOR SAFETY AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p3045, f3046

INSPECTION WATER INGRESS GAS VALVE AND PCB

Next: p3049, !f3050

RESISTANCE GAS VALVE AND HARNESS TO EARTH

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p3051, f3052

RESISTANCE HARNESS FAN

DISCONNECT FAN CONNECTOR FROM FAN

Next: !p3057, !f3058

RESISTANCE HARNESS CODE PLUG

DISCONNECT THE CONNECTOR FROM THE CODE PLUG

Next: p3061, !f3062

VOLTAGE FAN SELF CHECK

{GAINPCBACS}

Next: p3063, !f3064

RESISTANCE HARNESS FAN

DISCONNECT FAN CONNECTOR FROM FAN

Next: !p3065, !f3066

RESISTANCE HARNESS PUMP

DISCONNECT THE PLUG FROM THE PUMP

Next: !p3069, !f3070

OBSERVATION DIVERTER MOTOR MOVEMENT (REMOVED)

REMOVE DIVERTER MOTOR FROM ITS HOUSING AND PLACE IN A SAFE LOCATION TO OBSERVE ITS MOVEMENT

Next: !p352, f359

OBSERVATION PUMP RUNS

ENSURE APPLIANCE IS SET TO ECO MODE
DHW TEMPERATURE CONTROL TO MAX

Next: p3073, f3074

OBSERVATION FAN RUNS

ENSURE APPLIANCE IS SET TO ECO MODE
DHW TEMPERATURE CONTROL TO MAX

Next: !p3099, f3100

VOLTAGE FLOW TURBINE INTO BOILER

{GAINPCBACS}

Next: !p3093, f3094

OBSERVATION FLOW RATE INTO BOILER

Next: p3079, !f3080

INSPECTION FLOW COMPONENTS

HOT WATER CIRCUIT ISOLATED AND DRAINED

Next: !p3081, ?3083, ?3085, ?3087, ?3089, ?3091

INSPECTION PRESSURE SYSTEM

Next: p656, !f311

RESISTANCE HARNESS FLOW TURBINE

DISCONNECT THE INLINE PLUG FROM THE FLOW SENSOR

Next: !p3097, !f3098

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p313, !f312

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p3105, !f3106

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: p3107, !f3108

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p3109, !f3110

RESISTANCE SENSOR FLUE AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: p3111, f3112

OBSERVATION IS DHW INLET SENSOR FITTED

Next: p3115, !f3116

TEMPERATURE DHW INLET

ATTACH TEMPERATURE CLAMP TO DHW INLET PIPE

Next: !p3117, f3118

PRESSURE FAN MAX RATE

ATTACH FGA TO FAN PR

Next: p3124, f3125

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: p3132, !f3133

INSPECTION FAN BEARING PLATE

Next: p3128, !f3129

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p3130, !f3131

OBSERVATION DIVERTER MOTOR MOVEMENT

Next: p315, ?316, ?318

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p3134, !f3135

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p3136, ?3138, ?3140

TEMPERATURE DIFFERENTIAL SAFETY AND FLOW DHW

DHW TEMPERATURE CONTROL TO MAX

Next: p3239, !f3143

INSPECTION EXTERNAL BYPASS

Next: p2039, !f321

OBSERVATION BOILER RESET FAULT 258 356

Next: !p3156, !f3157

VOLTAGE PREHEAT DEMAND INTO BOILER

GAIN ACCESS TO LOWER PCB PANEL
EXTERNAL CONTROLS (IF FITTED) CALLING FOR PREHEAT

Next: p3165, !f3166

OBSERVATION INTERNAL PROGRAMMER PREHEAT

Next: p3167, !f3168

DISCONNECT INTERNAL CONTROLS PREHEAT

DISCONNECT THE INTEG

Next: !p3169, !f3170

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}
DISCONNECT PLUG FROM DIVERTER VALVE AND MAKE SAFE

Next: p323, !f389

INSPECTION AIR INLET INTEGRITY

DHW TEMPERATURE CONT

Next: p3176, f3177

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p3185, !f3186

INSPECTION CONDENSATE PIPE

Next: p3187, !f3188

INSPECTION FLUE SEALS

Next: p3189, ?3191, ?3193, ?3195

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p3197, ?3198, ?3200

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p3202, !f3203

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p3204, !f3205

INSPECTION AIR INLET INTEGRITY

DHW TEMPERATURE CONT

Next: p3207, f3208

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p3216, !f3217

INSPECTION CONDENSATE PIPE

Next: p3218, !f3219

INSPECTION FLUE SEALS

Next: p3220, ?3222, ?3224, ?3226

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: !p3228, ?3229, ?3231

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT THE PLUG FROM THE DIVERTER MOTOR

Next: !p324, !f325

DISCONNECT COMFORT CONTROLS

{GAINPCBACS}
DISCONNECT PLUG MARKED "EMS" ON LEFT HAND SIDE OF BOILER WIRING AND MAKE SAFE

Next: !p3237, !f3238

TEMPERATURE DHW COMPARISON - EXTERNAL MIXING TEST

Next: !p3240, !f3241

INSPECTION PRESSURE SYSTEM

Next: p328, !f329

PUMP LIMPET TEST

Next: p366, !f330

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2321, !f3356

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p3359, !f3360

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p3361, !f3362

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2068, !f3374

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p3376, !f3377

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p3378, !f3379

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2175, !f3388

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p3391, !f3392

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2590, !f3403

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p3406, !f3407

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p3408, !f3409

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2562, !f3418

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p3421, !f3422

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2542, !f3431

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p3434, !f3435

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2500, !f3448

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p2633, !f3453

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p3126, !f3460

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT THE PLUG FROM THE DIVERTER MOTOR

Next: !p385, !f363

INSPECTION CH TEMP SETTING

CH TEMPERATURE CONTROL KNOB SET TO MAX

Next: p702, !f378

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: !p2141, !f382

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p2814, !f394

RESISTANCE SENSOR DHW

DISCONNECT WIRES FROM DHW SENSOR

Next: p513, !f514

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p517, !f518

RESISTANCE SENSOR FLUE AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: p1918, f520

INFORMATION BLANK DISPLAY

THE DISPLAY FOR THIS

Next: p3009, !f2489

RESISTANCE FUSE (PCB)

REMOVE THE FUSE FROM ITS HOUSING

Next: p557, f558

OBSERVATION DISCONNECT X5 AT PCB

{GAINPCBACS}
DISCONNECT CONNECTOR X5 AT THE PCB AND MAKE SAFE
(THIRD CONNECTOR FROM THE LEFT)

Next: p561, !f562

OBSERVATION DISCONNECT FLOW TURBINE

DISCONNECT FLOW TURB

Next: !p563, !f564

INSPECTION FLOW COMPONENTS

HOT WATER CIRCUIT ISOLATED AND DRAINED

Next: !p584, ?585, ?587, ?589, ?591, ?593

VOLTAGE FLOW TURBINE INTO BOILER

{GAINPCBACS}

Next: !p597, f598

RESISTANCE HARNESS FLOW TURBINE

DISCONNECT THE INLINE PLUG FROM THE FLOW SENSOR

Next: !p601, !f602

OBSERVATION INTERNAL PROGRAMMER CH

Next: p272, !f655

PUMP LIMPET TEST

Next: p310, !f672

INSPECTION ISOLATION VALVE DHW

Next: p1874, !f686

OBSERVATION FAULT CODE AT SHUTDOWN

CH TEMPERATURE CONTROL KNOB TO MAX

Next: p708, f715

RESISTANCE SENSOR FLOW

REMOVE THE AIR INTAKE FROM THE FAN
DISCONNECT WIRES FROM FLOW SENSOR

Next: p709, !f710

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p711, !f712

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p2339, !f713

INSPECTION CH OUTPUT SETTINGS

Next: p2342, !f730

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p782, !f733

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: !p2129, ?735, ?737

INSPECTION PRESSURE SYSTEM

Next: p741, !f742

PUMP LIMPET TEST

Next: p1693, !f744

INSPECTION PUMP SETTINGS

Next: !p778, !f779

OBSERVATION DIVERTER MOTOR MOVEMENT

Next: p2490, ?793, ?799

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}
DISCONNECT PLUG FROM DIVERTER VALVE AND MAKE SAFE

Next: p795, !f796

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT THE PLUG FROM THE DIVERTER MOTOR

Next: !p797, !f798

RESISTANCE SENSOR DHW AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p880, f881

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL

Next: p886, f887

TEMPERATURE EXHAUST GAS (FAULT CODE)

CH TEMPERATURE CONTR

Next: !p892, ?894, ?896

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p924, !f925

RESISTANCE SENSOR SAFETY AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p926, !f927

RESISTANCE HARNESS CODE PLUG

DISCONNECT THE CONNECTOR FROM THE CODE PLUG

Next: !p983, !f984

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p952, !f953

RESISTANCE HARNESS PUMP

DISCONNECT THE PLUG FROM THE PUMP

Next: !p954, !f955

System Information

  • Total Tests: 1167
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control