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 RI COMPACT

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

WORCESTER GREENSTAR RI COMPACT

Next: &3, !f2

TYPE OF DIAGNOSTIC PROCEDURE

Next: &5, !f4

OBSERVATION BOILER SELF CHECK

ENSURE NO DEMANDS

Next: &47, ?6, ?8, ?10, ?12, ?517, ?539

OBSERVATION FAN RUNS

ENSURE APPLIANCE IS COOL
TEMPERATURE CONTROL SET TO MAX

Next: &73, f57

OBSERVATION DEMAND LED ILLUMINATED

TEMPERATURE CONTROL SET TO MAX

Next: &939, f49

OBSERVATION BURNER IGNITION

TEMPERATURE CONTROL SET TO MAX

Next: &203, ?74, ?76, ?78, ?80, ?82

OPERATION CH

TEMPERATURE CONTROL TO MAX

Next: &262, ?204, ?215, ?243

OPERATION DHW

TEMPERATURE CONTROL SET TO MAX

Next: &267, ?263, ?265

OBSERVATION PUMP OVERRUN

TEMPERATURE CONTROL SET TO MAX

Next: &276, ?268, ?270

COMBUSTION TEST MAX AND MINIMUM

REFIT OUTER CASE IF IT HAS BEEN REMOVED

Next: &nff, ?277, ?279

FAULT CODE 2

OUTSIDE MODEL

Next: &nff, f324

FAULT CODE 6

OUTSIDE MODEL

Next: &nff, f468

FAULT CODE 11

OUTSIDE MODEL

Next: &nff, f487

FAULT CODE 12

OUTSIDE MODEL

Next: &nff, f493

FAULT CODE 13

OUTSIDE MODEL

Next: &nff, f499

FAULT CODE 15

OUTSIDE MODEL

Next: &nff, f503

FAULT CODE 14

OUTSIDE MODEL

Next: &nff, f512

OBSERVATION SPARKING HEARD

TEMPERATURE CONTROL

Next: &nff, !f574

FURTHER INVESTIGATION FUSE PCB DUMMY

OUTSIDE MODEL

Next: &nff, f576

FURTHER INVESTIGATION MAINS FUSE DUMMY

OUTSIDE MODEL

Next: &nff, f596

FAULT CODE 1 - DUMMY - GOES TO OBSERVATION BURNER IGNITION

OUTSIDE MODEL

Next: &nff, !f622

FAULT CODE 3

OUTSIDE MODEL

Next: &nff, f624

FAULT CODE 7

OUTSIDE MODEL

Next: &nff, f632

FAULT CODE 8 DUMMY - GO TO FAULT 14

OUTSIDE MODEL

Next: &nff, !f677

FAULT CODE 10

OUTSIDE MODEL

Next: &nff, f656

FAULT CODE 9

OUTSIDE MODEL

Next: &nff, f724

FAULT CODE 4 - DUMMY - GOES TO OBSERVATION BURNER IGNITION

OUTSIDE MODEL

Next: &nff, !f761

FAULT CODE 5

OUTSIDE MODEL

Next: &nff, f945

OBSERVATION PUMP RUNS

TEMPERATURE CONTROL SET TO MAX

Next: &37, f940

LITE DIAGNOSTIC

DIAGNOSIS RELIES ON

Next: &nff, !f1046

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW SHOW

Next: &nff, !f1048

HEADER FOR QADAI SENSOR SAFETY

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1050

HEADER FOR QADAI SENSOR FLOW

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1054

HEADER FOR QADAI FAN RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1058

HEADER FOR QADAI FAN VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1062

HEADER FOR QADAI SPARK GEN RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1066

HEADER FOR QADAI GAS VALVE RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1070

HEADER FOR QADAI SENSOR RETURN

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1074

HEADER FOR QADAI GAS VALVE VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1078

HEADER FOR QADAI PUMP VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1082

HEADER FOR QADAI SPARK GEN VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1086

DAMAGED OR RESTRICTED AFFECTING FLAME STABILITY

MIXING UNIT ASSEMBLY

Next: End

DAMAGED OR RESTRICTED AFFECTING OUTPUT

MIXING UNIT ASSEMBLY

Next: End

DAMAGED OR RESTRICTED AFFECTING IGNITION FAULT CODE

MIXING UNIT ASSEMBLY

Next: End

DAMAGED OR RESTRICTED CAUSING INTERMITTENT IGNITION FAULT

MIXING UNIT ASSEMBLY

Next: End

DAMAGED OR RESTRICTED CAUSING INTERMITTENT FLAME ESTABLISH

MIXING UNIT ASSEMBLY

Next: End

DAMAGED OR RESTRICTED CAUSING BAFFLING FAULT CODE

MIXING UNIT ASSEMBLY

Next: End

BLANK FOR LITE DIAGNOSTIC

Z REDIRECT

Next: End

BLANK FOR QADAI

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION BAFFLES OR NOISY

HOUSING - BURNER

Next: End

QADAI

SENSOR - NTC MAX (OVERHEAT)

Next: End

QADAI

SENSOR 18MM (FLOW)

Next: End

QADAI

FAN

Next: End

FAN VOLTAGE QADAI

PCB

Next: End

QADAI

TRANSFORMER - IGNITION

Next: End

OBSERVATION BURNER IGNITION BAFFLES PRESSURE OK

BURNER

Next: End

RESISTANCE INCORRECT QADAI

GAS VALVE

Next: End

QADAI

SENSOR 18MM (RETURN)

Next: End

GAS VALVE VOLTAGE QADAI

PCB

Next: End

PUMP VOLTAGE QADAI

PCB

Next: End

SPARK GEN VOLTAGE QADAI

PCB

Next: End

FAULT CODES F

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION NO SPARKING

GAS VALVE

Next: End

OBSERVATION BURNER IGNITION NO POWER TO SPARK GEN

PCB

Next: End

OBSERVATION BURNER IGNITION HARNESS TO SPARK GENERATOR NO SPARKING

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

OBSERVATION BURNER IGNITION IGNITION LEAD NO SPARKING

HARNESS ASSEMBLY - HIGH VOLTAGE

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

BURNER

Next: End

OBSERVATION BURNER IGNITION DOES NOT IGNITE

FLUEWAYS

Next: End

OBSERVATION BURNER IGNITION

PCB AND GAS VALVE

Next: End

OBSERVATION BURNER IGNITION TO GAS VALVE SPARK NO IGNITION

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

OBSERVATION BURNER IGNITION NO IGNITION

PIPE - SUCTION (AIR INTAKE)

Next: End

OBSERVATION BOILER SELF CHECK INCORRECT POWER FAN PULSING

PCB

Next: End

OBSERVATION BURNER IGNITION IGNITION LEAD

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

OBSERVATION BURNER IGNITION SPARK BUT NO IGNITION

ELECTRODE

Next: End

OBSERVATION BURNER IGNITION IGNITES BUT CUTS OUT

SENSOR - NTC MAX (OVERHEAT)

Next: End

OBSERVATION BURNER IGNITION IGNITES BUT CUTS OUT

SENSOR 18MM (FLOW)

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

BURNER

Next: End

OBSERVATION BURNER IGNITION DOES NOT ESTABLISH

PIPE - SUCTION (AIR INTAKE)

Next: End

OBSERVATION BOILER SELF CHECK FAN PULSES

HARNESS ASSEMBLY - HIGH VOLTAGE

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

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

SYSTEM PRESSURE

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

PUMP

Next: End

OBSERVATION BOILER SELF CHECK

CODE PLUG

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

SYSTEM PRESSURE

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

PUMP

Next: End

OBSERVATION BOILER SELF CHECK CODE PLUG

HARNESS - LOW VOLTAGE

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

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 18MM (RETURN)

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

FLUEWAYS

Next: End

OPERATION CH INSUFFICIENT HEAT

INLET PRESSURE

Next: End

OBSERVATION BOILER SELF CHECK NO POWER TO FAN

PCB

Next: End

OPERATION CH INSUFFICENT HEAT

FLUE

Next: End

OPERATION CH INSUFFICIENT HEAT

VALVE - GAS-AIR (BEARING PLATE)

Next: End

OPERATION CH INSUFFICIENT HEAT

BURNER

Next: End

OBSERVATION BOILER SELF CHECK FAN DOES NOT RUN

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

COMBUSTION TEST

ELECTRODE

Next: End

COMBUSTION TEST

PIPE - SUCTION (AIR INTAKE)

Next: End

COMBUSTION TEST

SYPHON - LCS

Next: End

OBSERVATION DISPLAY ILLUMINATES BOILER SELF CHECK

FROST PROTECTION

Next: End

COMBUSTION TEST MAX AND MINIMUM

BURNER

Next: End

COMBUSTION TEST FAILED

FLUEWAYS

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 2 BAFFLES

SYPHON - LCS

Next: End

FAULT CODE 2 BAFFLES

FLUE

Next: End

FAULT CODE 2 BAFFLES

VALVE - GAS-AIR (BEARING PLATE)

Next: End

OBSERVATION BOILER SELF CHECK FROST PROTECTION

Next: End

FAULT CODE 2 BAFFLES

FLUEWAYS

Next: End

FAULT CODE 2 BAFFLES

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 2 AIR INTEGRITY BAFFLES

FLUE

Next: End

FAULT CODE 2 BAFFLES OR NOISY

HOUSING - BURNER

Next: End

FAULT CODE 2 DOES NOT ESTABLISH

FLUE

Next: End

FAULT CODE 2 DOES NOT ESTABLISH

VALVE - GAS-AIR (BEARING PLATE)

Next: End

FAULT CODE 2 DOES NOT ESTABLISH

BURNER

Next: End

FAULT CODE 2 DOES NOT ESTABLISH

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 2 NOT ESTABLISHING NO CURRENT SHORTED

ELECTRODE

Next: End

FAULT CODE 2 RECTIFICATION GROUND

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 2 RECTIFICATION LEAD

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 2 NOT ESTABLISHING NO CURRENT

ELECTRODE

Next: End

FAULT CODE 2 DOES NOT IGNITE

SYPHON - LCS

Next: End

FAULT CODE 2 NO IGNITION

FLUE

Next: End

FAULT CODE 2 DOES NOT IGNITE

VALVE - GAS-AIR (BEARING PLATE)

Next: End

FAULT CODE 2

BURNER

Next: End

FAULT CODE 2 DOES NOT IGNITE

FLUEWAYS

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

FAULT CODE 2

PCB AND GAS VALVE

Next: End

FAULT CODE 2 TO GAS VALVE SPARK NO IGNITION

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FAULT CODE 2 NO IGNITION

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 2 IGNITION LEAD

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FAULT CODE 2 SPARK BUT NO IGNITION

ELECTRODE

Next: End

FAULT CODE 2 IGNITES OK

FLUE

Next: End

FAULT CODE 2 IGNITES OK

VALVE - GAS-AIR (BEARING PLATE)

Next: End

FAULT CODE 2 IGNITES OK

INLET PRESSURE

Next: End

FAULT CODE 2 IGNITION OK

ELECTRODE

Next: End

FAULT CODE 2 IGNITES OK

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 2 IGNITES OK

SYPHON - LCS

Next: End

FAULT CODE 6

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 6

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 6

SENSOR 18MM (RETURN)

Next: End

FAULT CODE 11

CODE PLUG

Next: End

FAULT CODE 11

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 12

PCB

Next: End

FAULT CODE 12

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FAULT CODE 13

PCB

Next: End

FAULT CODE 14

PCB

Next: End

OBSERVATION BOILER SELF CHECK

SENSOR 18MM (FLOW)

Next: End

OBSERVATION BOILER SELF CHECK SENSOR OVERHEAT

SENSOR - NTC MAX (OVERHEAT)

Next: End

OBSERVATION BOILER SELF CHECK NO DISPLAY

WATER INGRESS

Next: End

OBSERVATION FAN RUNS NO POWER TO EXT CONTROLS

PCB

Next: End

OBSERVATION BOILER SELF CHECK

GAS VALVE

Next: End

FAULT CODE 15

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

OBSERVATION BOILER SELF CHECK LOW POWER

Next: End

OBSERVATION FAN RUNS FAULTY LED

PCB

Next: End

OBSERVATION BOILER SELF CHECK

FUSE (FUSED SPUR)

Next: End

OBSERVATION BOILER SELF CHECK

FUSE INTERNAL 5A

Next: End

OBSERVATION SPARKING HEARD

Z REDIRECT

Next: End

FURTHER INVESTIGATION FUSE

PCB

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 MAINS FUSE

PCB

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

OBSERVATION FAN RUNS

SENSOR 18MM (RETURN)

Next: End

FAULT CODE 1

Z REDIRECT

Next: End

FAULT CODE 3

WATER INGRESS

Next: End

OBSERVATION FAN RUNS

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 3

GAS VALVE

Next: End

FAULT CODE 7

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 7 WILL NOT RESET

PCB

Next: End

FAULT CODE 7

Z REDIRECT

Next: End

FAULT CODE 7

SYSTEM PRESSURE

Next: End

OBSERVATION FAN RUNS NOT FIRING FOR DHW

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 10

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 10 WILL NOT RESET

PCB

Next: End

FAULT CODE 10

Z REDIRECT

Next: End

FAULT CODE 10

SYSTEM PRESSURE

Next: End

FAULT CODE 8

Z REDIRECT

Next: End

FAULT CODE 15

CODE PLUG

Next: End

FAULT CODE 15 CODE PLUG

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION FAN RUNS

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

FAULT CODE 15

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 15

SENSOR 18MM (RETURN)

Next: End

FAULT CODE 15

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 9 WILL NOT RESET

PCB

Next: End

FAULT CODE 9

Z REDIRECT

Next: End

FAULT CODE 9

SYSTEM PRESSURE

Next: End

FAULT CODE 9

SENSOR 18MM (RETURN)

Next: End

FAULT CODE 4

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION NOT ESTABLISHING

SYPHON - LCS

Next: End

FAULT CODE 2 - BAFFLES

BURNER

Next: End

OBSERVATION BURNER IGNITION BAFFLES

SYPHON - LCS

Next: End

FAULT CODE 9 NO POWER TO PUMP

PCB

Next: End

FAULT CODE 9

PUMP WIRING

Next: End

FAULT CODE 9

PUMP

Next: End

FAULT CODE 9

Next: End

FAULT CODE 9

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 9

SENSOR 18MM (FLOW)

Next: End

OBSERVATION BURNER IGNITION BAFFLES

FLUE

Next: End

FAULT CODE 10 NO POWER TO PUMP

PCB

Next: End

FAULT CODE 10

PUMP WIRING

Next: End

FAULT CODE 10

PUMP

Next: End

FAULT CODE 10

Next: End

OBSERVATION BURNER IGNITION BAFFLES

VALVE - GAS-AIR (BEARING PLATE)

Next: End

FAULT CODE 10 WILL NOT RESET

SENSOR - NTC MAX (OVERHEAT)

Next: End

FAULT CODE 10

SENSOR 18MM (RETURN)

Next: End

FAULT CODE 7 NO POWER TO PUMP

PCB

Next: End

FAULT CODE 7

PUMP WIRING

Next: End

FAULT CODE 7

PUMP

Next: End

OBSERVATION BURNER IGNITION BAFFLES PRESSURE LOW

BURNER

Next: End

FAULT CODE 7

SENSOR 18MM (FLOW)

Next: End

FAULT CODE 7

SENSOR 18MM (RETURN)

Next: End

OBSERVATION PUMP RUNS

PCB

Next: End

OBSERVATION PUMP RUNS

PUMP WIRING

Next: End

OBSERVATION BURNER IGNITION BAFFLES

FLUEWAYS

Next: End

FAULT CODE 5 FAULTY SOLENOID

GAS VALVE

Next: End

OBSERVATION BURNER IGNITION BAFFLES

PIPE - SUCTION (AIR INTAKE)

Next: End

FAULT CODE 5

ELECTRODE

Next: End

FAULT CODE 306 FA

FLUE

Next: End

FAULT 306 FA

SYPHON - LCS

Next: End

FAULT CODE 5 PASSING

GAS VALVE

Next: End

CASUING GAS VALVE FAULT CODE

WATER INGRESS

Next: End

DAMAGED OR RESTRICTED AFFECTING FLAME ESTABLISH

MIXING UNIT ASSEMBLY

Next: End

DAMAGED OR RESTRICTED AFFECTING IGNITION

MIXING UNIT ASSEMBLY

Next: End

OBSERVATION BURNER IGNITION BURNER BAFFLES

NOZZLE (INJECTOR)

Next: End

OBSERVATION BURNER IGNITION BURNER BAFFLES

HOSE - GAS

Next: End

SENSOR SAFETY

RESULT AS EXPECTED

Next: End

SENSOR FLOW

RESULT AS EXPECTED

Next: End

FAN RESISTANCE

RESULT AS EXPECTED

Next: End

OBSERVATION BURNER IGNITION BAFFLES

GAS VALVE

Next: End

FAN VOLTAGE

RESULT AS EXPECTED

Next: End

SPARK GEN RESISTANCE

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE

RESULT AS EXPECTED

Next: End

SENSOR RETURN

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE

RESULT AS EXPECTED

Next: End

SPARK GEN VOLTAGE

RESULT AS EXPECTED

Next: End

FAULT CODES P

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION TO GAS VALVE NO SPARKING

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

OBSERVATION BURNER IGNITION NO SPARKING

TRANSFORMER - IGNITION

Next: End

OBSERVATION BURNER IGNITION NO SPARKING

ELECTRODE

Next: End

OBSERVATION BURNER IGNITION NO IGNITION

FAN

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

PCB

Next: End

OBSERVATION BURNER IGNITION

PCB AND HARNESS HIGH VOLTAGE

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 IGNITES BUT CUTS OUT

PCB

Next: End

OBSERVATION BOILER SELF CHECK FAN PULSES

FAN

Next: End

OBSERVATION BURNER IGNITION DOES NOT ESTABLISH

FLUEWAYS

Next: End

OBSERVATION BURNER IGNITION NO VOLTAGE TO RECTIFICATION CIRCUIT

PCB

Next: End

OBSERVATION BURNER IGNITION RECTIFICATION SHORTING

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION BURNER IGNITION NOT RECOGNISING RECIFICATION VOLTAGE

PCB

Next: End

OBSERVATION BURNER IGNITION NOT ESTABLISHING LOW VOLTAGE

PCB

Next: End

OPERATION CH UP TO TEMP RADS DO NOT HEAT

Next: End

OPERATION CH SHUTS DOWN BEFORE REACHING TEMP

PCB

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

LIMITER - TEMPERATURE (FLUE STAT)

Next: End

OPERATION CH INSUFFICIENT HEAT

FLUEWAYS

Next: End

OPERATION CH INSUFFICIENT HEAT

PCB

Next: End

OPERATION CH INSUFFICIENT HEAT

NOZZLE (INJECTOR)

Next: End

OBSERVATION BOILER SELF CHECK FAN DOES NOT RUN

FAN

Next: End

OPERATION CH INSUFFICIENT HEAT

HOSE - GAS

Next: End

OPERATION DHW DOES NOT RESPOND

Next: End

OPERATION DHW UNSATISFACTORY

Next: End

OBSERVATION PUMP OVERRUN CH

PCB

Next: End

OBSERVATION PUMP OVERRUN DOES NOT OVERRUN

PCB

Next: End

COMBUSTION TEST DROPS ON MINIMUM

GAS VALVE

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

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

OBSERVATION BOILER SELF CHECK FROST PROTECTION

PCB

Next: End

FAULT CODE 2 BURNER BAFFLES

NOZZLE (INJECTOR)

Next: End

FAULT CODE 2 IGNITION BURNER BAFFLES

HOSE - GAS

Next: End

FAULT CODE 2 BAFFLES

GAS VALVE

Next: End

FAULT CODE 2 DOES NOT ESTABLISH

FLUEWAYS

Next: End

FAULT CODE 2 NO VOLTAGE TO RECTIFICATION CIRCUIT

PCB

Next: End

FAULT CODE 2 RECTIFICATION SHORTING

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 2 NOT RECOGNISING RECIFICATION VOLTAGE

PCB

Next: End

FAULT CODE 2 NOT ESTABLISHING LOW VOLTAGE

PCB

Next: End

FAULT CODE 2 NO IGNITION

FAN

Next: End

FAULT CODE 2 NO IGNITION

INLET PRESSURE

Next: End

FAULT CODE 2 NO IGNITION NO DROP

NOZZLE (INJECTOR)

Next: End

FAULT CODE 2 NO IGNITION NO DROP

HOSE - GAS

Next: End

FAULT CODE 2 NO POWER TO GAS VALVE

PCB

Next: End

FAULT CODE 2

PCB AND HARNESS HIGH VOLTAGE

Next: End

FAULT CODE 2 NO PRESSURE DROP

GAS VALVE

Next: End

FAULT CODE 2 SPARKING NO IGNITION

NOZZLE (INJECTOR)

Next: End

FAULT CODE 2 NO IGNITION PRESSURE DROP

HOSE - GAS

Next: End

FAULT CODE 2 NO IGNITION

TRANSFORMER - IGNITION

Next: End

FAULT CODE 2 PRESSURE DROP SEEN

GAS VALVE

Next: End

FAULT CODE 2 IGNITES OK

FLUEWAYS

Next: End

FAULT CODE 2

NO FAULT FOUND

Next: End

FAULT CODE 2 IGNITES OK DROPS ON MINIMUM

GAS VALVE

Next: End

FAULT CODE 2 COMBUSTION TEST FAILED

FLUE

Next: End

FAULT CODE 2 COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL - CONDENSATE COLLECTOR

Next: End

FAULT CODE 2 COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL - FLUE

Next: End

FAULT CODE 2 COMBUSTION TEST FAILED AIR INTEGRITY FAILED

SEAL

Next: End

FAULT CODE 2 COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL - CONDENSATE COLLECTOR

Next: End

FAULT CODE 2 COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL - FLUE

Next: End

FAULT CODE 2 COMBUSTION TEST FAILED AIR INTEGRITY OK

SEAL

Next: End

FAULT CODE 2 IGNITES OK FAILS COMBUSTION

GAS VALVE

Next: End

FAULT CODE 2 IGNITES OK

NOZZLE (INJECTOR)

Next: End

FAULT CODE 2 IGNITES OK

HOSE - GAS

Next: End

FAULT CODE 6

Z REDIRECT

Next: End

FAULT CODE 6 FLOW SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 6 SAFETY SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 6

PCB

Next: End

FAULT CODE 6 RETURN SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 11

PCB

Next: End

FAULT CODE 12

FAN

Next: End

FAULT CODE 13

Z REDIRECT

Next: End

FAULT CODE 14

Z REDIRECT

Next: End

OBSERVATION FAN RUNS

Next: End

OBSERVATION BOILER SELF CHECK FLOW SENSOR

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION BOILER SELF CHECK SAFETY SENSOR

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION BOILER SELF CHECK STUCK IN FAULT

PCB

Next: End

OBSERVATION BOILER SELF CHECK FAN RUNS CONSTANT SPEED

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FAULT CODE 15 FAN DOES NOT RUN

PCB

Next: End

FAULT CODE 15 FLUE STAT

HARNESS - LOW VOLTAGE

Next: End

OBSERVATION FAN RUNS

Z REDIRECT

Next: End

OBSERVATION BOILER SELF CHECK FAN RUNS CONTINUALLY

PCB

Next: End

OBSERVATION BOILER SELF CHECK NO POWER

Next: End

OBSERVATION BOILER SELF CHECK MAINS FUSE

Z REDIRECT

Next: End

OBSERVATION BOILER SELF CHECK INTERNAL FUSE

Z REDIRECT

Next: End

FURTHER INVESTIGATION FUSE PCB PUMP

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE PCB GAS VALVE

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE PCB FAN

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FURTHER INVESTIGATION

FUSE INTERNAL 5A FURTHER INVESTIGATION

Next: End

FURTHER INVESTIGATION FUSE PCB SPARK GENERATOR

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FURTHER INVESTIGATION MAINS FUSE PUMP

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FURTHER INVESTIGATION MAINS FUSE GAS VALVE

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FURTHER INVESTIGATION MAINS FUSE FAN

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FURTHER INVESTIGATION

FUSE (FUSED SPUR) FURTHER INVESTIGATION

Next: End

FURTHER INVESTIGATION MAINS FUSE SPARK GENERATOR

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

OBSERVATION FAN RUNS RETURN SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 3 STUCK IN FAULT

PCB

Next: End

FAULT CODE 3

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

OBSERVATION FAN RUNS NO RESPONSE TO CH

PCB

Next: End

OBSERVATION FAN RUNS FLUE SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 15

PCB

Next: End

FAULT CODE 15 SAFETY SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 15 RETURN SENSOR

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 15 FLOW SENSOR

HARNESS - LOW VOLTAGE

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

OPERATION CH SHUTS DOWN BEFORE TEMP

FLOW AND RETURN CROSSED

Next: End

FAULT CODE 2 BAFFLES

FAN

Next: End

FAULT CODE 9 NOT RUNNING

PUMP

Next: End

FAULT CODE 9

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FAULT CODE 9

FLOW AND RETURN CROSSED

Next: End

FAULT CODE 9

PCB

Next: End

FAULT CODE 10 NOT RUNNING

PUMP

Next: End

FAULT CODE 10

PCB

Next: End

FAULT CODE 10

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FAULT CODE 10

FLOW AND RETURN CROSSED

Next: End

FAULT CODE 7 NOT RUNNING

PUMP

Next: End

FAULT CODE 7

PCB

Next: End

FAULT CODE 7

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FAULT CODE 7

FLOW AND RETURN CROSSED

Next: End

OBSERVATION BURNER IGNITION BAFFLES

FAN

Next: End

OBSERVATION PUMP RUNS

PUMP

Next: End

FAULT CODE 5

HARNESS ASSEMBLY - HIGH VOLTAGE

Next: End

FAULT CODE 5

HARNESS - LOW VOLTAGE

Next: End

FAULT CODE 5

PCB

Next: End

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p543

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p101

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p103

DEMAND LED ILLUMINATES AFTER SELF CHECK OR BOILER ATTEMPTS TO FIRE WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p28

NO PRESSURE DROP OBSERVED

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p135

PRESSURE DROPS BELOW 16.5MB

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p137

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p140

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p142

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p156

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p158

APPROX 90V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p182

VOLTAGE LESS THAN 30V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p184

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

CHARACTERISTIC TEST FROM OPERATION CH

Next: p205

BOILER SHUTS DOWN BEFORE REACHING TEMPERATURE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p216

BOILER REMAINS LIT BUT BOILER AND RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM OPERATION CH

Next: p245

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p259

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p261

BOILER DOES NOT RESPOND TO DHW DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: !p264

DHW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM OPERATION DHW

Next: !p266

PUMP OVERRUNS EXCESSIVELY

CHARACTERISTIC TEST FROM OBSERVATION PUMP OVERRUN

Next: !p269

PUMP OVERRUNS FOR LESS THAN 3 MINUTES OR DOES NOT OVERRUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP OVERRUN

Next: !p271

COMBUSTION TEST FAILED

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p278

BOILER DROPS OUT ON MINIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p280

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p287

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p289

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p291

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p299

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p301

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p303

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p306

GAS SUPPLY TUBE BLOCKED RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p308

SPARKING HEARD BUT NO IGNITION OR IGNITION INTERMITTENT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION FAULT CODE 2

Next: p327

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH OR ESTABLISHES INTERMITTENTLY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION FAULT CODE 2

Next: p329

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p331

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p347

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p349

APPROX 90V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p367

VOLTAGE LESS THAN 30V AC MEASURED

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p369

NO PRESSURE DROP OBSERVED

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p395

PRESSURE DROPS BELOW 16.5MB

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p397

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p400

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p402

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p416

GAS SUPPLY TUBE BLOCKED, RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p418

COMBUSTION TEST FAILED

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p436

BOILER DROPS OUT ON MINIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p438

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p445

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p447

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p449

LOWER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p457

UPPER CONDENSATE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p459

INNER FLUE SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p461

INJECTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION GAS SUPPLY TUBE

Next: !p464

GAS SUPPLY TUBE BLOCKED RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE SEALS

Next: !p466

FAN RUNS AT A CONSTANT SPEED FOR 2 MINUTES THEN STOPS

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p518

FAN RUNS AT A CONSTANT SPEED CONTINUALLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p540

FAULT CODE DISPLAYED (DEMAND LED FLASHING)

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1089

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p814

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p757

DIFFERENTIAL OK BUT RETURN HOTTER THAN FLOW

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p759

BURNER IGNITES SMOOTHLY AND SPARKING CEASES BUT BURNER CUTS OUT IMMEDIATELY AFTER

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p77

SPARKING HEARD BUT NO IGNITION

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p79

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

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p14

NO SPARKING HEARD

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p81

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p83

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p893

DIFFERENTIAL OK BUT RETURN HOTTER THAN FLOW

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p895

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p917

DIFFERENTIAL OK BUT RETURN HOTTER THAN FLOW

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p919

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p936

DIFFERENTIAL OK BUT RETURN HOTTER THAN FLOW

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW AND RETURN

Next: !p938

09/06/2023 08:40:26 2305_2_50_1 29/11/2023 12:52:17

09/08/2023 10:34:55

Next: End

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p1051, !f1052

RESISTANCE SENSOR FLOW

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

Next: !p1055, !f1056

RESISTANCE FAN FURTHER INVESTIGATION

DISCONNECT ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p1059, !f1060

VOLTAGE FAN SELF CHECK

{GAINPCBACS}

Next: !p1063, !f1064

RESISTANCE SPARK GENERATOR FURTHER INVESTIGATION

REMOVE AIR INTAKE
DISCONNECT CONNECTOR FROM SPARK GENERATOR

Next: !p1067, !f1068

RESISTANCE GAS VALVE

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p1071, !f1072

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: !p1075, !f1076

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
TEMPERATURE CONTROL SET TO MAX

Next: !p1079, !f1080

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p1083, !f1084

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}
TEMPERATURE CONTROL SET TO MAX

Next: !p1087, !f1088

RESISTANCE GAS VALVE

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p110, !f111

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}
TEMPERATURE CONTROL SET TO MAX

Next: p114, !f115

INSPECTION CONDENSATE PIPE

Next: p122, !f123

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: !p145, f146

RESISTANCE GAS VALVE

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p147, !f148

RESISTANCE IGNITION LEAD

DISCONNECT THE IGNIT

Next: !p161, !f162

INSPECTION FLUE

Next: p983, !f172

RESISTANCE RECTIFICATION ELECTRODE TO EARTH

DISCONNECT LEAD FROM RECTIFICATION ELECTRODE

Next: !p187, !f188

TEMPERATURE EXHAUST GAS

TEMPERATURE CONTROL

Next: !p241, !f242

INSPECTION FLUE

Next: p1008, !f251

INSPECTION FLUE SEALS

Next: !p285, ?286, ?288, ?290

OBSERVATION BURNER IGNITION FAULT CODE 2

TEMPERATURE CONTROL SET TO MAX

Next: p325, ?326, ?328, ?330

INSPECTION FLUE

Next: p1036, !f337

INSPECTION FLUE

Next: p1029, !f357

RESISTANCE RECTIFICATION ELECTRODE TO EARTH

DISCONNECT LEAD FROM RECTIFICATION ELECTRODE

Next: !p372, !f373

INSPECTION CONDENSATE PIPE

Next: p382, !f383

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: !p405, f406

RESISTANCE GAS VALVE

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p407, !f408

RESISTANCE IGNITION LEAD

DISCONNECT THE IGNIT

Next: !p421, !f422

INSPECTION FLUE

Next: p1015, !f428

INSPECTION FLUE SEALS

Next: !p443, ?444, ?446, ?448

OBSERVATION BOILER RESET FAULT 6

ENSURE APPLIANCE IS COOL
ENSURE NO DEMANDS

Next: !p469, f470

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p471, f472

RESISTANCE SENSOR FLOW

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

Next: !p473, !f474

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p477, !f478

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: !p483, !f484

INSPECTION CODE PLUG

{GAINPCBACS}

Next: p488, !f489

VOLTAGE CH DEMAND INTO BOILER

GAIN ACCESS TO LOWER PCB PANEL

Next: p50, f51

VOLTAGE FAN SELF CHECK

{GAINPCBACS}

Next: p494, !f495

OBSERVATION BOILER RESET FAULT 13

ENSURE NO DEMANDS

Next: !p500, !f501

OBSERVATION BOILER RESET FAULT 15

ENSURE NO DEMANDS

Next: p692, f678

VOLTAGE CH DEMAND OUT OF BOILER

{GAINPCBACS}

Next: !p52, !f53

OBSERVATION BOILER RESET FAULT 8 & 14

ENSURE BOILER IS COOL
ENSURE NO DEMANDS

Next: !p513, !f514

RESISTANCE SENSOR FLOW

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

Next: !p521, !f522

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p525, !f526

RESISTANCE GAS VALVE TO EARTH

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p531, !f532

RESISTANCE SENSOR FLUE

DISCONNECT WIRES FROM FLUE SENSOR

Next: !p538, !f537

RESISTANCE FUSE (MAINS FUSE)

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p554, f555

FURTHER INVESTIGATION MAINS FUSE

Next: !p556, !f557

FURTHER INVESTIGATION FUSE PCB

Next: !p569, !f570

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p58, f59

RESISTANCE MAINS IN FURTHER INVESTIGATION

GAIN ACCESS TO THE LOWER PANEL OF THE PCB

Next: p577, !f578

RESISTANCE PUMP FURTHER INVESTIGATION

GAIN ACCESS TO PUMP WIRING CONNECTIONS
DISCONNECT WIRES FROM THE PUMP OR REMOVE CONNECTOR

Next: !p581, !f582

RESISTANCE GAS VALVE FURTHER INVESTIGATION

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p585, !f586

RESISTANCE FAN FURTHER INVESTIGATION

DISCONNECT ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p589, !f590

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: !p615, !f617

RESISTANCE SPARK GENERATOR FURTHER INVESTIGATION

REMOVE AIR INTAKE
DISCONNECT CONNECTOR FROM SPARK GENERATOR

Next: !p593, !f594

RESISTANCE MAINS IN FURTHER INVESTIGATION

GAIN ACCESS TO THE LOWER PANEL OF THE PCB

Next: p597, !f598

RESISTANCE PUMP FURTHER INVESTIGATION

GAIN ACCESS TO PUMP WIRING CONNECTIONS
DISCONNECT WIRES FROM THE PUMP OR REMOVE CONNECTOR

Next: !p601, !f602

RESISTANCE GAS VALVE FURTHER INVESTIGATION

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p605, !f606

RESISTANCE FAN FURTHER INVESTIGATION

DISCONNECT ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p609, !f610

RESISTANCE SPARK GENERATOR FURTHER INVESTIGATION

REMOVE AIR INTAKE
DISCONNECT CONNECTOR FROM SPARK GENERATOR

Next: !p613, !f614

INSPECTION WATER INGRESS GAS VALVE AND PCB

Next: p625, !f626

RESISTANCE GAS VALVE FURTHER INVESTIGATION

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p629, !f630

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p633, !f634

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p657, !f658

RESISTANCE SENSOR FLUE

DISCONNECT WIRES FROM FLUE SENSOR

Next: !p68, !f69

RESISTANCE SENSOR SAFETY AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p701, f689

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: !p690, !f691

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: !p699, !f700

RESISTANCE SENSOR FLOW

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

Next: !p708, !f709

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: p725, !f743

INSPECTION FLUE

Next: p999, !f89

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p877, !f878

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p901, !f902

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p922, !f923

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p941, !f942

INSPECTION WATER INGRESS GAS VALVE AND PCB

Next: p963, !f980

RESISTANCE GAS VALVE FURTHER INVESTIGATION

DISCONNECT ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p966, !f967

RESISTANCE RECTIFICATION ELECTRODE TO EARTH

DISCONNECT LEAD FROM RECTIFICATION ELECTRODE

Next: !p970, !f971

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p250, !f1014

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p427, !f1019

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p384, !f1028

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p356, !f1035

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p336, !f1044

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p106, !f107

OBSERVATION DISCONNECT SPARK ELECTRODE LEAD

TEMPERATURE CONTROL

Next: p112, f113

FAULT CODES


Next: !p1090, !f1091

RESISTANCE IGNITION LEAD (OPEN CIRCUIT CHECK)

DISCONNECT THE IGNIT

Next: !p118, !f119

RESISTANCE HARNESS PCB TO SPARK GENERATOR

DISCONNECT PLUG FROM THE SPARK GENERATOR

Next: !p116, !f117

PRESSURE GAS INLET AND DROP

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT
TEMPERATURE CONTROL SET TO MAX

Next: p132, ?134, ?136

INSPECTION FLUE

Next: p990, !f125

INSPECTION FAN BEARING PLATE

Next: p126, !f127

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p128, !f129

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p130, !f131

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p151, !f152

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p138, ?139, ?141

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
TEMPERATURE CONTROL SET TO MAX

Next: p143, f144

VOLTAGE FAN SELF CHECK

{GAINPCBACS}

Next: p15, !f16

RESISTANCE HARNESS GAS VALVE

DISCONNECT THE PLUG FROM THE GAS VALVE

Next: !p149, !f150

RESISTANCE HARNESS FAN

DISCONNECT ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p17, !f18

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p153, ?155, ?157

OBSERVATION SPARK GENERATOR OUTPUT

REMOVE THE AIR INTAK

Next: p159, f160

INSPECTION ELECTRODE ASSEMBLY

SLIDE THE SPARK GENE

Next: !p163, !f164

RESISTANCE SENSOR FLOW

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

Next: !p167, !f168

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p177, !f178

INSPECTION FAN BEARING PLATE

Next: p173, !f174

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p175, !f176

VOLTAGE RECTIFICATION CIRCUIT

{GAINPCBACS}
ATTACH A CROCODILE CLIP TO THE RECTIFICATION LEAD
TEMPERATURE CONTROL TO MAX

Next: p179, ?181, ?183

RESISTANCE RECTIFICATION LEAD

{GAINPCBACS}
DISC

Next: p191, !f192

RESISTANCE HARNESS RECTIFICATION GROUND

DISCONNECT X7 FROM THE PCB
DISCONNECT / UNCLIP THE FLAME SENSE LEAD FROM THE SAFETY SENSOR

Next: !p189, !f190

RESISTANCE RECTIFICATION CIRCUIT TO EARTH

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: !p185, f186

INSPECTION CODE PLUG

{GAINPCBACS}

Next: p20, !f21

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p193, !f194

RESISTANCE HARNESS CODE PLUG

DISCONNECT THE CONNECTOR X3 (RIGHTMOST CONNECTOR) FROM THE PCB

Next: p22, !f23

INSPECTION SYSTEM FILLED AND VENTED

Next: p207, !f206

LIMPET TEST

Next: p210, !f208

INSPECTION EXTERNAL BYPASS

Next: !p212, !f219

INSPECTION SYSTEM FILLED AND VENTED

Next: p221, !f220

VOLTAGE FAN SELF CHECK

{GAINPCBACS}

Next: p24, !f25

LIMPET TEST

Next: p226, !f222

RESISTANCE SENSOR FLOW

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

Next: p224, !f237

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p225, !f238

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: p230, !f239

INSPECTION EXTERNAL BYPASS

Next: p223, !f236

TEMPERATURE DIFFERENTIAL FLOW AND RETURN

TEMPERATURE CONTROL

Next: p231, ?756, ?758

VOLTAGE SENSOR FLUE AT TEMPERATURE

TEMPERATURE CONTROL

Next: !p232, f235

RESISTANCE HARNESS FAN

DISCONNECT ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p26, !f27

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT
TEMPERATURE CONTROL SET TO MAX

Next: p246, !f247

PRESSURE FAN MAX RATE

ATTACH U-GAUGE TO FA

Next: p248, f249

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: !p256, ?258, ?260

INSPECTION FAN BEARING PLATE

Next: p252, !f253

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p254, !f255

INSPECTION AIR INLET INTEGRITY

REFIT COMBUSTION COV

Next: p283, f284

TEMPERATURE FLOW

REMOVE AIR INTAKE FROM APPLIANCE

Next: p29, !f30

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p281, !f282

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p292, !f293

RESISTANCE SENSOR FLOW

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

Next: p31, !f32

INSPECTION CONDENSATE PIPE

Next: p294, !f295

INSPECTION FLUE SEALS

Next: p296, ?298, ?300, ?302

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p304, ?305, ?307

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p309, !f310

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p311, !f313

VOLTAGE CH AND DHW DEMAND INTO BOARD (NO DEMAND)

GAIN ACCESS TO LOWER PCB PANEL
ENSURE CENTRAL HEATING AND DHW ARE TURNED OFF

Next: !p33, !f34

PRESSURE FAN MAX RATE

ATTACH U-GAUGE TO FA

Next: p425, f426

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p380, f381

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p354, f355

INSPECTION CONDENSATE PIPE

Next: p332, !f333

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p334, f335

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p342, !f343

INSPECTION FAN BEARING PLATE

Next: p338, !f339

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: p846, !f341

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p344, ?346, ?348

INSPECTION FLUE

Next: p350, !f351

INSPECTION HOUSING BURNER

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

Next: !p352, !f353

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p362, !f363

INSPECTION FAN BEARING PLATE

Next: p358, !f359

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p360, !f361

VOLTAGE RECTIFICATION CIRCUIT

{GAINPCBACS}
ATTACH A CROCODILE CLIP TO THE RECTIFICATION LEAD
TEMPERATURE CONTROL TO MAX

Next: p364, ?366, ?368

RESISTANCE RECTIFICATION LEAD

{GAINPCBACS}
DISC

Next: p376, !f377

RESISTANCE HARNESS RECTIFICATION GROUND

DISCONNECT X7 FROM THE PCB
DISCONNECT / UNCLIP THE FLAME SENSE LEAD FROM THE SAFETY SENSOR

Next: !p374, !f375

RESISTANCE RECTIFICATION CIRCUIT TO EARTH

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: !p370, f371

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p378, !f379

PRESSURE GAS INLET AND DROP

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT
TEMPERATURE CONTROL SET TO MAX

Next: p392, ?394, ?396

INSPECTION FLUE

Next: p1020, !f385

INSPECTION FAN BEARING PLATE

Next: p386, !f387

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p388, !f389

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p390, !f391

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p411, !f412

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p398, ?399, ?401

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
TEMPERATURE CONTROL SET TO MAX

Next: p403, f404

RESISTANCE HARNESS GAS VALVE

DISCONNECT THE PLUG FROM THE GAS VALVE

Next: !p409, !f410

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p413, ?415, ?417

OBSERVATION SPARK GENERATOR OUTPUT

REMOVE THE AIR INTAK

Next: p419, f420

INSPECTION ELECTRODE ASSEMBLY

SLIDE THE SPARK GENE

Next: !p423, !f424

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT
TEMPERATURE CONTROL SET TO MAX

Next: p431, !f432

INSPECTION FAN BEARING PLATE

Next: !p429, !f430

COMBUSTION TEST MAX AND MINIMUM

REFIT OUTER CASE IF IT HAS BEEN REMOVED

Next: !p433, ?435, ?437

INSPECTION AIR INLET INTEGRITY

REFIT COMBUSTION COV

Next: p441, f442

INSPECTION RECTIFICATION ELECTRODE

SLIDE THE SPARK GENE

Next: !p439, !f440

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p450, !f451

INSPECTION CONDENSATE PIPE

Next: p452, !f453

INSPECTION FLUE SEALS

Next: p454, ?456, ?458, ?460

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: !p462, ?463, ?465

RESISTANCE SENSOR SAFETY AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p475, f476

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: !p479, f480

RESISTANCE HARNESS CODE PLUG

DISCONNECT THE CONNECTOR X3 (RIGHTMOST CONNECTOR) FROM THE PCB

Next: !p490, !f491

RESISTANCE HARNESS FAN

DISCONNECT ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p496, !f497

INFORMATION FAULTY LED

TESTS SHOW THAT THE

Next: !p54, !f55

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p519, f520

RESISTANCE SENSOR SAFETY AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p523, f524

INSPECTION WATER INGRESS GAS VALVE AND PCB

Next: p527, !f528

RESISTANCE GAS VALVE AND HARNESS TO EARTH

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: !p529, f530

RESISTANCE SENSOR FLUE AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: !p535, f534

VOLTAGE MAINS POWER IN (FAN RUNNING)

GAIN ACCESS TO THE MAINS CONNECTORS ON THE PCB

Next: !p541, !f542

VOLTAGE MAINS POWER IN

GAIN ACCESS TO THE MAINS CONNECTORS ON THE PCB

Next: p558, f553

RESISTANCE FUSE (PCB)

REMOVE THE FUSE FROM ITS HOUSING

Next: p19, f568

RESISTANCE PUMP AND HARNESS FURTHER INVESTIGATION

{GAINPCBACS}
DISCONNECT PUMP CONNECTOR (MIDDLE PLUG) FROM THE PCB

Next: p579, f580

RESISTANCE GAS VALVE AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p583, f584

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p62, !f63

RESISTANCE FAN AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X10 FROM THE PCB

Next: p587, f588

RESISTANCE SPARK GENERATOR AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: !p591, f592

RESISTANCE PUMP AND HARNESS FURTHER INVESTIGATION

{GAINPCBACS}
DISCONNECT PUMP CONNECTOR (MIDDLE PLUG) FROM THE PCB

Next: p599, f600

RESISTANCE GAS VALVE AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p603, f604

RESISTANCE FAN AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X10 FROM THE PCB

Next: p607, f608

RESISTANCE SPARK GENERATOR AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: !p611, f612

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p64, !f65

RESISTANCE GAS VALVE AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: !p627, f628

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL
ENSURE NO DEMANDS

Next: p637, !f638

INFORMATION APPLIANCE OVERHEAT

DUE TO THE DESIGN OF

Next: p639, !f640

INSPECTION SYSTEM FILLED AND VENTED

Next: p920, !f642

RESISTANCE SENSOR FLUE AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: !p66, f67

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL
ENSURE NO DEMANDS

Next: p661, !f662

INFORMATION APPLIANCE OVERHEAT

DUE TO THE DESIGN OF

Next: p663, !f664

INSPECTION SYSTEM FILLED AND VENTED

Next: p899, !f666

INSPECTION CODE PLUG

{GAINPCBACS}

Next: p685, !f686

RESISTANCE HARNESS CODE PLUG

DISCONNECT THE CONNECTOR X3 (RIGHTMOST CONNECTOR) FROM THE PCB

Next: !p687, !f688

RESISTANCE SENSOR RETURN AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p533, f698

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p684, f707

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL
ENSURE NO DEMANDS

Next: p727, !f728

INFORMATION APPLIANCE OVERHEAT

DUE TO THE DESIGN OF

Next: p729, !f730

INSPECTION SYSTEM FILLED AND VENTED

Next: p875, !f732

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p169, f170

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p165, !f166

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p120, f121

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p108, f109

INSPECTION CONDENSATE PIPE

Next: p75, !f842

INSPECTION CONDENSATE PIPE

Next: p84, !f85

PRESSURE FAN LOCKOUT

1. ATTACH FGA

Next: p86, f87

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: !p847, !f848

INSPECTION AIR INTAKE FAN

REMOVE THE FAN AIR INTAKE FROM THE FAN

Next: p96, !f97

OBSERVATION PUMP RUNS

TEMPERATURE CONTROL SET TO MAX

Next: p881, f876

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO PUMP WIRING

Next: !p879, !f880

INSPECTION FAN BEARING PLATE

Next: p90, !f91

LIMPET TEST

Next: p882, !f883

INSPECTION EXTERNAL BYPASS

Next: p884, !f885

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p886, !f887

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p888, !f889

TEMPERATURE DIFFERENTIAL FLOW AND RETURN

TEMPERATURE CONTROL

Next: !p897, ?892, ?894

OBSERVATION PUMP RUNS

TEMPERATURE CONTROL SET TO MAX

Next: p905, f900

INSPECTION BURNER ASSEMBLY

REMOVE THE FAN HOOD ASSEMBLY

Next: p92, !f93

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO PUMP WIRING

Next: !p903, !f904

LIMPET TEST

Next: p906, !f907

INSPECTION EXTERNAL BYPASS

Next: p908, !f909

RESISTANCE SENSOR SAFETY

DISCONNECT WIRES FROM SAFETY SENSOR

Next: p910, !f911

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: p912, !f913

TEMPERATURE DIFFERENTIAL FLOW AND RETURN

TEMPERATURE CONTROL

Next: !p914, ?916, ?918

INSPECTION HEAT EXCHANGER FLUE WAYS

Next: !p94, !f95

OBSERVATION PUMP RUNS

TEMPERATURE CONTROL SET TO MAX

Next: p926, f921

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO PUMP WIRING

Next: !p924, !f925

LIMPET TEST

Next: p927, !f928

RESISTANCE SENSOR FLOW AND HARNESS

{GAINPCBACS}
DISCONNECT LOW VOLTAGE CONNECTOR X7 FROM THE PCB

Next: p929, !f930

RESISTANCE SENSOR RETURN

DISCONNECT WIRES FROM RETURN SENSOR

Next: p931, !f932

TEMPERATURE DIFFERENTIAL FLOW AND RETURN

TEMPERATURE CONTROL

Next: !p933, ?935, ?937

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO PUMP WIRING

Next: !p943, !f944

INSPECTION GAS SUPPLY TUBE

UNSCREW THE GAS SUPPLY TUBE FROM THE GAS VALVE

Next: p98, ?100, ?102

RESISTANCE GAS VALVE AND HARNESS FURTHER INVESTIGATION

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p964, f965

RESISTANCE RECTIFICATION CIRCUIT TO EARTH

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: p968, f969

INSPECTION FLUE

Next: p972, !f973

INSPECTION CONDENSATE PIPE

Next: p974, !f975

PRESSURE TIGHTNESS TEST

Next: !p982, !f977

INSPECTION HOUSING BURNER

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

Next: p104, !f105

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p171, !f989

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p124, !f998

INSPECTION MIXING UNIT ASSEMBLY

DISCONNECT THE FAN C

Next: p88, !f1007

System Information

  • Total Tests: 728
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control