XSol Diagnostic System

POTTERTON SUPRIMA HE 70 AND 80 | PERFORMA SL HE 21 AND 24 | MAIN 24 HE

GLOBALLY REPLACED

Next: &269, *

FUNCTIONAL SEQUENCE (NULL)

NOT USED

Next: &277N, f274

FAULT CODE (NULL)

NOT USED

Next: &787, f278

FAN STOPS AND APS RETURNS TO REST (NULL)

NOT USED

Next: &nff, f848

AIR PRESSURE SWITCH AT REST (NULL)

NOT USED

Next: &nff, f862

CIRCULATION FAULT CODE (NULL)

NOT USED

Next: &nff, f866

OVER HEAT FAULT CODE (NULL)

NOT USED

Next: &nff, f886

THERMISTOR FAULT CODE TREE

INTENTIONALLY BLANK, HEADER FOR THERMISTOR AND CASTING THERMISTOR FAULT CODE

Next: &nff, f950

PCB FAULT CODE (NULL)

NOT USED

Next: &nff, f974

NO FAULT FOUND

Next: nff

PUMP RUNS ON DEMAND FOR HEATING

Next: &14, f29

FAN RUNS ON DEMAND FOR HEATING

Next: &61, f1204

BURNER LIGHTS AND ESTABLISHES

Next: &156, ?62, ?64, ?66

CENTRAL HEATING OPERATION

Next: &297, ?160, ?162, ?164

CASE OFF

Next: &271, !f270

DIAGNOSTIC OPTIONS

PLEASE SELECT FROM O

Next: &273N, !f272

PUMP OVER RUN

Next: &299, !f298

HOT WATER OPERATION

Next: &nff, !f300

POWER UP - RIGHT HAND GREEN LED LIT

CH TEMPERATURE CONTROL SET TO MAX

Next: &8, ?808, ?834

APS STUCK FAULT CODE

NOT USED

Next: &nff, f982

FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: &nff, f1245

FAULT CODE APS STUCK

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

FAULT CODE APS STUCK

KIT - FAN (MECHANICAL)

Next: End

FAULT CODE APS STUCK 2

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

FAULT CODE APS STUCK

SENSOR - TEMPERATURE - NTC

Next: End

FAULT CODE APS STUCK

SENSOR - TEMPERATURE - NTC

Next: End

FLOW THERMISTOR

SENSOR - TEMPERATURE - NTC

Next: End

CASTING THERMISTOR

SENSOR - TEMPERATURE - NTC

Next: End

CLEAN FAN3

KIT - FAN (MECHANICAL)

Next: End

FAN NOT RUNNING - BROKEN N

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

FAN DOES NOT RUN

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

FAN NOT RUNNING CALIBRATION

SENSOR - TEMPERATURE - NTC

Next: End

FAN NOT RUNNING CALIBRATION

SENSOR - TEMPERATURE - NTC

Next: End

FAULT CODE AIR PROVING

KIT - FAN AND FLUE ELBOW ASSEMBLY

Next: End

FUSE FURTHER INVESTIGATION 2

KIT - FAN AND FLUE ELBOW ASSEMBLY

Next: End

FUSE FURTHER INVESTIGATION

KIT - FAN (ELECTRICAL)

Next: End

FUSE FURTHER INVESTIGATION 2

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

FUSE FURTHER INVESTIGATION

KIT - GAS VALVE (ELECTRICAL)

Next: End

INTERNAL FUSE

FUSE - 3.15A - 250V - 20MM

Next: End

NO LIGHTS

FUSE SPUR

Next: End

NO LEDS

IGNITOR ASSEMBLY & HARNESS ASSEMBLY

Next: End

LED FLASHING

IGNITOR ASSEMBLY & HARNESS ASSEMBLY

Next: End

LED FLASHING

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

LED FLASHING SPARK GEN

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

BURNER DOES NOT IGNITE

TRAP ASSEMBLY / CONDENSATE PIPEWORK

Next: End

BURNER DOES NOT IGNITE

IGNITOR ASSEMBLY & HARNESS ASSEMBLY

Next: End

NO POWER TO SPARK GEN

PCB ASSEMBLY

Next: End

NO POWER TO SPARK GEN

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

NOT SPARKING

LEAD - IGNITION

Next: End

NOT RECTIFYING

INJECTOR

Next: End

NOT LIGHTING

KIT - 4 WAY HEAT EXCHANGER

Next: End

FAULT CODE AIR PROVING

KIT - 4 WAY HEAT EXCHANGER

Next: End

BOILER COOL

INJECTOR

Next: End

BAFFELING OUT

KIT - 4 WAY HEAT EXCHANGER

Next: End

BOILER COOL

SENSOR - TEMPERATURE - NTC

Next: End

CH OP - BOILER AND SYSTEM COLD

SENSOR - TEMPERATURE - NTC

Next: End

CH OP - BOILER HOT RADS COLD

Next: End

CH OP - BOILER HOT SYSTEM COLD - NO POWER TO PUMP

PCB ASSEMBLY

Next: End

UNABLE TO SET BURNER PRESSURE

KIT - GAS VALVE (MECHANICAL)

Next: End

CASE REMOVAL

NULL TESTS

Next: End

FOR TYPE DIAG PROCEDURE

NULL TESTS

Next: End

PASS FUNCTIONAL SEQUENCE

DUMMY

Next: End

FAIL FAULT CODE

DUMMY

Next: End

FAILING TO LIGHT

INJECTOR

Next: End

NO OUTPUT

KIT - GAS VALVE (MECHANICAL)

Next: End

PUMP NOT OVER RUNNING

PCB ASSEMBLY

Next: End

NO HOT WATER DEMAND

Next: End

NO POWER TO GAS VALVE

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

CH OP - SHUTS DOWN PREM

SENSOR - TEMPERATURE - NTC

Next: End

CASTING SENSOR - SHUTS DOWN PREM

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

NOT RESPONDING TO DEMAND

Next: End

NO POWER TO PUMP

EXTERNAL WIRING

Next: End

CH OP - SHUTS DOWN PREM

TRAP ASSEMBLY - CONDENSATE

Next: End

CH OP - SHUTS DOWN PREM

FLUE

Next: End

BAFFELING OUT

GAS SUPPLY

Next: End

CLEAN FAN1

KIT - FAN (MECHANICAL)

Next: End

BAFFLING OUT

SEAL -FLUE TUBE

Next: End

BAFFELING OUT

FLUE

Next: End

NOT SENSING FLAME

ELECTRODE - SPECIAL

Next: End

NOT SENSING FLAME

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

IGNITION PRESSURE LOW

GAS SUPPLY

Next: End

NO VOLTAGE TO PUMP

PCB ASSEMBLY

Next: End

BOILER HOT RADS COLD

EXTERNAL WIRING

Next: End

BURNER BAFFLES OUT

TRAP ASSEMBLY - CONDENSATE

Next: End

NO POWER TO PCB

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

NO LED

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

NO LED SPARK GEN

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

NO OUTPUT

KIT - GAS VALVE (ELECTRICAL)

Next: End

NO POWER TO GAS VALVE

PCB ASSEMBLY

Next: End

FAN STOPS

TRAP ASSEMBLY - CONDENSATE

Next: End

NOT RETURNING AFTER DEMAND

FLUE

Next: End

CLEAN FAN2

KIT - FAN (MECHANICAL)

Next: End

FAN NOT RUNNING

FAN VENTURI

Next: End

CH OP - CIRC FAULT - NO POWER TO PUMP

PCB ASSEMBLY

Next: End

CIRC FAULT - NO POWER TO PUMP

EXTERNAL WIRING

Next: End

CH OP - CIRC FAULT

Next: End

CIRC FAULT

SENSOR - TEMPERATURE - NTC

Next: End

CH OP - CIRC FAULT

SENSOR - TEMPERATURE - NTC

Next: End

CIRC FAULTRENAME

SENSOR - TEMPERATURE - NTC

Next: End

CH OP - CIRC FAULTRENAME

SENSOR - TEMPERATURE - NTC

Next: End

OL - OVERHEAT FAULT CODE

THERMOSTAT - OVERHEAT - THERMODISC

Next: End

OVER HEAT FAULT CODE - DIFF WRONG - NOT POWER TO PUMP

PCB ASSEMBLY

Next: End

OVER HEAT FAULT CODE - TEMP DIFF WRONG

EXTERNAL WIRING

Next: End

OVERHEAT FAULT CODE - DIFF TEMP WRONG

Next: End

OVER HEAT FAULT CODE - TEMP DIFF WRONG

SENSOR - TEMPERATURE - NTC

Next: End

OL - TEMP DIFF OK - OVERHEAT FAULT CODE

THERMOSTAT - OVERHEAT - THERMODISC

Next: End

OVER HEATING - TEMP DIFF WRONG

KIT - GAS VALVE (MECHANICAL)

Next: End

OVER HEAT FAULT CODE - NOISY- NOT POWER TO PUMP

PCB ASSEMBLY

Next: End

OVER HEAT FAULT CODE - BOILER NOISY

EXTERNAL WIRING

Next: End

OVERHEAT FAULT CODE

Next: End

OVER HEAT FAULT CODE

SENSOR - TEMPERATURE - NTC

Next: End

OL - BOILER NOISY - OVERHEAT FAULT CODE

THERMOSTAT - OVERHEAT - THERMODISC

Next: End

OVER HEATING - GAS PRESSURE TOO HIGH

KIT - GAS VALVE (MECHANICAL)

Next: End

OVERHEAT FAULT CODE

SENSOR - TEMPERATURE - NTC

Next: End

OVERHEAT FAULT CODE

SENSOR - TEMPERATURE - NTC

Next: End

FAULT CODE

SENSOR - TEMPERATURE - NTC

Next: End

FAULT CODE

SENSOR - TEMPERATURE - NTC

Next: End

NOT RESPONDING TO DEMANDRENAME

Next: End

NO VOLTAGE TO PUMPRENAME

PCB ASSEMBLY

Next: End

NO POWER TO PUMPRENAME

EXTERNAL WIRING

Next: End

CALIBRATION

SENSOR - TEMPERATURE - NTC

Next: End

CALIBRATION

SENSOR - TEMPERATURE - NTC

Next: End

PCB FAULT CODE

Next: End

PCB FAULT CODE

KIT - GAS VALVE (ELECTRICAL)

Next: End

FAULT CODE APS STUCK 3

PCB ASSEMBLY

Next: End

FAULT CODE APS STUCK

KIT - FAN (ELECTRICAL)

Next: End

FAULT CODE APS STUCK

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

FAULT CODE APS STUCK

Next: End

FAULT CODE APS STUCK 2

PCB ASSEMBLY

Next: End

FLOW SENSOR - FAN NOT RUNNING

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

CASTING SENSOR - FAN NOT RUNNING

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

NOT RUNNING ON DEMAND - COIL OL

KIT - FAN (ELECTRICAL)

Next: End

FAN NOT RUNNING

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

FAN NOT RUNNING THERMSTOR CALIBRATION

Next: End

FAN NOT RUNNING

PCB ASSEMBLY

Next: End

FUSE FURTHER INVESTIGATION

FLUE ELBOW ASSEMBLY

Next: End

FUSE FURTHER INVESTIGATION

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

FUSE FURTHER INVESTIGATION

IGNITOR ASSEMBLY

Next: End

FUSE FURTHER INVESTIGATION 3

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

FUSE FURTHER INVESTIGATION

Z REDIRECTION

Next: End

PERM LIVE SUPPLY INTO BOILER

Next: End

FUSE FURTHER INVESTIGATION 2

Z REDIRECTION

Next: End

FUSE FURTHER INVESTIGATION 3

Z REDIRECTION

Next: End

LED FLASHING

IGNITOR ASSEMBLY

Next: End

LED FLASHING

KIT - GAS VALVE (ELECTRICAL)

Next: End

POWER IN - LIGHTS FLASHING

PCB ASSEMBLY

Next: End

FAN DOES NOT RUN

SWITCH - AIR PRESSURE

Next: End

FAN DOES NOT RUN

TUBE - SIGNAL

Next: End

FAN DOES NOT RUN

FAN VENTURI

Next: End

FAULT CODE APS STUCK

SWITCH - AIR PRESSURE

Next: End

FAULT CODE APS STUCK

TUBE - SIGNAL

Next: End

FAULT CODE APS STUCK

FAN VENTURI

Next: End

FUSE FURTHER INVESTIGATION

PCB FUSE FURTHER INVESTIGATION

Next: End

FAN NOT RUNNING - BROKEN COIL

KIT - FAN (ELECTRICAL)

Next: End

FAULT CODE APS STUCK 2

KIT - FAN (ELECTRICAL)

Next: End

PCB FAULT

KIT - FAN (ELECTRICAL)

Next: End

FAILING TO LIGHT - NO SPARK

FAN VENTURI

Next: End

BURNER IGNITES BLOCKE OR DAMAGED

TUBE - SIGNAL

Next: End

APS NOT SWITCHING - NO SPARKING

SWITCH - AIR PRESSURE

Next: End

APS NOT MAKING

HEAT EXCHANGER - SECONDARY

Next: End

NO SPARK

SUMP ASSEMBLY - SECONDARY HEAT EXCHANGER

Next: End

NO OUTPUT

IGNITOR ASSEMBLY

Next: End

NOT CROSS LIGHTING

BURNER SUB - ASSEMBLY

Next: End

NOT RETURNING AFTER DEMAND

SWITCH - AIR PRESSURE

Next: End

FAULT CODE AIR PROVING

HEAT EXCHANGER - SECONDARY

Next: End

FAULT CODE AIR PROVING

SUMP ASSEMBLY - SECONDARY HEAT EXCHANGER

Next: End

NO SPARKING

FLUE HOOD - SECONDARY HEAT EXCHANGER

Next: End

BAFFLES OUT

FLUE HOOD - SECONDARY HEAT EXCHANGER

Next: End

SHUTS DOWN PREM

FLUE HOOD - SECONDARY HEAT EXCHANGER

Next: End

FAULT CODE AIR PROVING

FLUE HOOD - SECONDARY HEAT EXCHANGER

Next: End

CH OP - BOILER AND SYSTEM COLD

PCB ASSEMBLY

Next: End

FLOW SENSOR - BOILER COOL

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

CH OP - BOILER HOT RADS COLD 2

Next: End

CH OP - BOILER HOT RADS COLD

Next: End

CASTING SENSOR - BOILER COOL

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

FAIL FUNCTIONAL SEQUENCE

DUMMY

Next: End

PASS FAULT CODE

DUMMY

Next: End

DIES AWAY ON IGN

GAS SUPPLY

Next: End

FAILING TO LIGHT

BURNER SUB - ASSEMBLY

Next: End

FAILING TO LIGHT

KIT - GAS VALVE (MECHANICAL)

Next: End

FLOW - CH OP - SHUTS DOWN PREM

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

SHUTS DOWN PREM

SENSOR - TEMPERATURE - NTC

Next: End

NOT RUNNING ON DEMAND

PUMP

Next: End

CH OP - SHUTS DOWN PREM

PCB ASSEMBLY

Next: End

BAFFELING OUT

BURNER SUB - ASSEMBLY

Next: End

BAFFELING OUT

HEAT EXCHANGER - SECONDARY

Next: End

BURNER BAFFLES OUT

SUMP ASSEMBLY - SECONDARY HEAT EXCHANGER

Next: End

NOT SENSING FLAME

PCB ASSEMBLY

Next: End

IGNITION PRESSURE LOW

KIT - GAS VALVE (MECHANICAL)

Next: End

FAIL LIMPET - BOILER HOT SYSTEM COLD

PUMP

Next: End

LED LIGHT OFF

IGNITOR ASSEMBLY

Next: End

NO MAINS LED

KIT - GAS VALVE (ELECTRICAL)

Next: End

POWER IN - NO LIGHTS

PCB ASSEMBLY

Next: End

SHUTTING DOWN PREM

HEAT EXCHANGER - SECONDARY

Next: End

SHUTTING DOWN PREM

SUMP ASSEMBLY - SECONDARY HEAT EXCHANGER

Next: End

NOT RETURNING AFTER DEMAND

FAN VENTURI

Next: End

NOT RETURNING AFTER DEMAND

TUBE - SIGNAL

Next: End

APS NOT AT REST - FAN NOT RUNNING

SWITCH - AIR PRESSURE

Next: End

FAIL LIMPET - CIRC FAULT

PUMP

Next: End

CH OP - CIRC FAULT

Next: End

FLOW SENSOR - CIRC FAULT

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

CH OP - CIRC FAULT

PCB ASSEMBLY

Next: End

CASTING SENSOR - CIRC FAULT

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

FLOW SENSOR - CIRC FAULTRENAME

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

CH OP - CIRC FAULTRENAME

PCB ASSEMBLY

Next: End

CASTING SENSOR - CIRC FAULTRENAME

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

OVER HEAT FAULT CODE - NOT READING OVERHEAT STAT

PCB ASSEMBLY

Next: End

OVER HEAT FAULT CODE

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

OVER HEAT FAULT CODE - TEMP DIFF WRONG

PUMP

Next: End

FLOW SENSOR - OVER HEAT FAULT CODE - DIFF WRONG

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

OVER HEAT FAULT CODE - TEMP DIFF OK

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

OVER HEAT FAULT CODE

Next: End

OVER HEAT FAULT CODE - BOILER NOISY

PUMP

Next: End

FLOW SENSOR - OVER HEAT FAULT CODE - NOISY

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

OVER HEAT FAULT CODE - BOILER NOISY

HARNESS ASSEMBLY - HIGH VOLTAGE DC

Next: End

BOILER NOISY - OVER HEAT FAULT CODE

KIT - 4 WAY HEAT EXCHANGER

Next: End

NOT SHUTTING BOILER DOWN

PCB ASSEMBLY

Next: End

CASTING SENSOR - FAULT CODE

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

FLOW SENSOR - FAULT CODE

HARNESS ASSEMBLY - LOW VOLTAGE

Next: End

DIFFERENTIAL INCORRECT

Next: End

NOT RUNNING ON DEMANDRENAME

PUMP

Next: End

FLOW THERMISTOR FAULT CODE

PCB ASSEMBLY

Next: End

FAULT CODE APS STUCK

Z REDIRECTION

Next: End

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM FAN RUNS - FAULT CODE APS STUCK

Next: p1184

BOILER WILL NOT RESET - FAULT CODE APS STUCK

CHARACTERISTIC TEST FROM FAN RUNS - FAULT CODE APS STUCK

Next: p1077

240V ON BOTH CONNECTIONS TO EARTH

CHARACTERISTIC TEST FROM VOLTAGE AT FAN FROM PCB (POL CHECK)

Next: p1187

240V ACCROSS FAN TERMINALS

CHARACTERISTIC TEST FROM VOLTAGE AT FAN FROM PCB (POL CHECK)

Next: p1189

240V ON BOTH CONNECTIONS TO EARTH

CHARACTERISTIC TEST FROM VOLTAGE AT FAN FROM PCB (POL CHECK)

Next: p1216

240V ACCROSS FAN TERMINALS

CHARACTERISTIC TEST FROM VOLTAGE AT FAN FROM PCB (POL CHECK)

Next: p1218

AIR PRESSURE TUBES BLOCKED, RESTRICTED AND/OR DAMAGED

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK (FAULT CODE)

Next: !p1311

FAN VENTURI BLOCKED / RESTRICTED

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK (FAULT CODE)

Next: !p1313

AIR PRESSURE TUBES BLOCKED, RESTRICTED AND/OR DAMAGED

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK (FAULT CODE)

Next: !p1318

FAN VENTURI BLOCKED / RESTRICTED

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK (FAULT CODE)

Next: !p1320

FAN VENTURI BLOCKED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK

Next: !p1336

APS TUBES BLOCKED OR DAMAGED

CHARACTERISTIC TEST FROM FAN RUNS - FAULT CODE APS STUCK

Next: !p1338

EXCHANGER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p1344

SUMP DAMAGED / RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p1346

EXCHANGER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p1382

SUMP DAMAGED / RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p1384

FLUE HOOD DAMAGED

Next: !p1387

FLUE HOOD DAMAGED

Next: !p1389

FLUE HOOD DAMAGED

Next: !p1391

FLUE HOOD DAMAGED

Next: !p1393

BOILER AND SYSTEM REMAIN TOO COOL

CHARACTERISTIC TEST FROM CENTERAL HEATING OPERATION

Next: p166

BOILER HOT OR NOISY BUT SYSTEM COOL

CHARACTERISTIC TEST FROM CENTERAL HEATING OPERATION

Next: p181

BOILER SHUTS DOWN PREMATURLY

CHARACTERISTIC TEST FROM CENTERAL HEATING OPERATION

Next: p344

INLET PRESSURE DIES AWAY

CHARACTERISTIC TEST FROM GAS INLET PRESSURE (BLIP TEST)

Next: !p284

INLET PRESSURE DOES NOT MOVE

CHARACTERISTIC TEST FROM GAS INLET PRESSURE (BLIP TEST)

Next: p286

EXCHANGER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p451

SUMP DAMAGED / RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p453

EXCHANGER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p832

SUMP DAMAGED / RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p833

BURNER DOES NOT LIGHT

CHARACTERISTIC TEST FROM BURNER LIGHTS AND ESTABLISHES

Next: p68

BURNER LIGHTS BUT FAILS TO ESTABLISH

CHARACTERISTIC TEST FROM BURNER LIGHTS AND ESTABLISHES

Next: p464

BURNER LIGHTS BUT BAFFLES OUT

CHARACTERISTIC TEST FROM BURNER LIGHTS AND ESTABLISHES

Next: p663

NO LIGHTS DISPLAYED

CHARACTERISTIC TEST FROM POWER UP - RIGHT HAND GREEN LED LIT

Next: p810

RIGHT HAND LED FLASHES

CHARACTERISTIC TEST FROM POWER UP - RIGHT HAND GREEN LED LIT

Next: p1296

FAN VENTURI BLOCKED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK

Next: !p854

APS TUBES BLOCKED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK

Next: !p856

TEMP DIFFERENTIAL CORRECT BUT BOILER NOISY

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK

Next: p906

TEMPERATURE DIFFERENTIAL IS INCORRECT

CHARACTERISTIC TEST FROM INSPECT FAN VENTURI AND PIPE WORK

Next: p908

20/05/2019 10:04:43 1904_1_46_1 23/05/2019 14:11:36

20/05/2019 11:23:45

Next: End

RESISTANCE AIR PRESSURE SWITCH (NO AIR)

REMOVE BOTH WIRES FROM THE AIR PRESSURE SWITCH,
NOTE THEIR POSITIONS

Next: p1087, !f1088

DIFFERENTIAL CHECK THERMISTORS

Next: !p1198, f1199

CALIBRATION THERMISTOR FLOW

Next: p1200, !f1201

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p1205, f1206

RESISTANCE SENSOR TEMP FLOW

Next: !p1207, !f1208

RESISTANCE CASTING THERMISTOR

Next: !p1211, !f1212

RESISTANCE AIR PRESSURE SWITCH AND HARNESS (NO AIR)

REMOVE THE 12 WAY PLUG FROM THE FRONT EDGE OF THE PCB

Next: p1227, f1228

RESISTANCE AIR PRESSURE SWITCH (NO AIR)

REMOVE BOTH WIRES FROM THE AIR PRESSURE SWITCH,
NOTE THEIR POSITIONS

Next: p1229, !f1230

CALIBRATION THERMISTOR FLOW

Next: p1237, !f1238

INSPECTION FAN ASSEMBLY

Next: !p1275, !f1243

INSPECTION INTERNAL ELBOW (FUSE FURTHER INVESTIGATION)

Next: p1246, f1250

INSPECTION FAN ASSEMBLY (FUSE FURTHER INVESTIGATION)

Next: !p1251, !f1252

RESISTANCE FAN ASSEMBLY (FUSE FURTHER INVESTIGATION)

REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p1256, !f1257

RESISTANCE GAS VALVE (FUSE FURTHER INVESTIGATION)

Next: !p1264, !f1265

RESISTANCE SPARK GENERATOR HARNESS (FUSE FURTHER INVESTIGATION)

REMOVE THE PLUG FROM THE SPARK GENERATOR AND THE 8 WAY PLUG FROM THE PCB

Next: !p1262, !f1263

FUSE FURTHER INVESTIGATION - INTERNAL FUSE

THE INFORMATION PROV

Next: !p1267, !f1268

RESISTANCE FUSE (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p1272, f1271

FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p1273, !f1274

OBSERVATION REMOVE CONNECTOR FROM GAS VALVE (FLASHING)

REMOVE THE CONNECTOR FROM THE GAS VALVE AND MAKE SAFE
NO DEMAND

Next: !p1301, f1302

RESISTANCE GAS VALVE HARNESS FOR LED FAULT

REMOVE BOTH THE 4 WAY PLUG FROM THE PCB AND THE PLUG FROM THE GAS VALVE.

Next: p1303, !f1304

AIR PRESSURE SWITCH OPERATION

REMOVE AND MAKE SAFE BOTH WIRES FROM THE AIR PRESSURE SWITCH

Next: p1332, f1333

INSPECT FAN VENTURI AND PIPE WORK

Next: p1334, ?1335, ?1337

RESISTANCE SENSOR TEMP FLOW

Next: !p173, !f174

RESISTANCE CASTING THERMISTOR

Next: !p211, !f178

PUMP LIMPET TEST

Next: !p184, f185

VOLTAGE PCB TO PUMP

{GAINPCBACS}

Next: p545, !f190

FUNCTIONAL SEQUENCE

NOT LONGER USED

Next: !p275, !f276

FAULT CODE

Next: !p279, !f280

EXTERNAL CONTROLS INPUT TO BOILER

{GAINPCBACS}
GAIN ACCESS TO TERMINAL STRIP AS NECESSARY

Next: p50, !f38

RESISTANCE SENSOR TEMP FLOW

Next: !p347, !f348

RESISTANCE CASTING THERMISTOR

Next: !p351, !f352

IGNITION BURNER PRESSURE

ATTACH A U-GAUGE TO THE BURNER PRESSURE TEST POINT OF THE GAS VALVE

Next: p1355, f472

GAS INLET PRESSURE (BLIP TEST)

ATTACH A U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: !p473, !f474

OBSERVATION REMOVE CONNECTOR FROM GAS VALVE

REMOVE THE CONNECTOR FROM THE GAS VALVE AND MAKE SAFE
NO DEMAND

Next: !p819, f820

RESISTANCE GAS VALVE HARNESS FOR LED FAULT

REMOVE BOTH THE 4 WAY PLUG FROM THE PCB AND THE PLUG FROM THE GAS VALVE.

Next: p821, !f822

CONDENSATE TRAP

Next: p1150, !f850

INSPECT FAN VENTURI AND PIPE WORK

Next: !p863, !f864

DIFFERENTIAL TEMPERATURE CHECK

Next: p867, f868

PUMP LIMPET TEST

Next: p869, f870

VOLTAGE PCB TO PUMP

{GAINPCBACS}

Next: p871, !f872

RESISTANCE SENSOR TEMP FLOW

Next: !p879, !f880

RESISTANCE CASTING THERMISTOR

Next: !p883, !f884

OBSERVATION RESET BOILER

NO DEMAND
ENSURE APPLIANCE IS COOL

Next: p887, f888

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p889, f890

RESISTANCE SENSOR TEMP FLOW

Next: !p891, !f892

RESISTANCE CASTING THERMISTOR

Next: !p895, !f896

RESISTANCE OVER HEAT THERMOSTAT AND HARNESS

REMOVE THE 8 WAY CONNECTOR FROM THE PCB

Next: !p899, f900

RESISTANCE OVER HEAT THERMOSTAT

REMOVE BOTH WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p901, !f902

VOLTAGE PCB TO PUMP

{GAINPCBACS}

Next: p911, !f912

RESISTANCE SENSOR TEMP FLOW

Next: !p919, !f920

RESISTANCE OVER HEAT THERMOSTAT

REMOVE BOTH WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p923, !f924

VOLTAGE PCB TO PUMP

{GAINPCBACS}

Next: p929, !f930

RESISTANCE SENSOR TEMP FLOW

Next: !p937, !f938

RESISTANCE OVER HEAT THERMOSTAT

REMOVE BOTH WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p941, !f942

RESISTANCE CASTING THERMISTOR AND HARNESS

Next: p951, f952

RESISTANCE CASTING THERMISTOR

Next: !p953, !f954

RESISTANCE SENSOR TEMP FLOW

Next: !p957, !f958

PUMP RUNNING THERMISTOR FAULT CODE

LOCATE EXTERNAL PUMP

Next: !p961, f962

EXTERNAL CONTROLS INPUT TO BOILER

{GAINPCBACS}
GAIN ACCESS TO TERMINAL STRIP AS NECESSARY

Next: p963, !f964

MAINS POWER SUPPLY

REMOVE THE SCREW TO

Next: p975, !f976

FAN RUNS - FAULT CODE APS STUCK

Next: !p983, ?1017, ?1048

RESISTANCE AIR PRESSURE SWITCH AND HARNESS (NO AIR)

REMOVE THE 12 WAY PLUG FROM THE FRONT EDGE OF THE PCB

Next: !p1093, f1086

INSPECT FAN VENTURI AND PIPE WORK (FAULT CODE)

Next: !p1314, ?1317, ?1319

INSPECTION INTERNAL ELBOW

Next: p1366, f1241

VOLTAGE AT FAN FROM PCB (POLARITY CHECK)

Next: p1185, ?1186, ?1188

VOLTAGE OUTPUT FROM PCB TO FAN

{GAINPCBACS}

Next: !p1196, f1197

RESISTANCE FAN HARNESS

Next: !p1327, !f1193

INSPECT AND CLEAN FAN IMPELLOR

Next: !p1190, !f1191

CALIBRATION THERMISTOR CASTING

Next: !p1202, !f1203

RESISTANCE CASTING THERMISTOR AND HARNESS

Next: p1209, f1210

VOLTAGE AT FAN FROM PCB (POLARITY CHECK)

Next: p1213, ?1215, ?1217

VOLTAGE OUTPUT FROM PCB TO FAN

{GAINPCBACS}

Next: !p1225, f1226

RESISTANCE FAN HARNESS

Next: !p1324, !f1222

INSPECT AND CLEAN FAN IMPELLOR

Next: !p1219, !f1220

DIFFERENTIAL CHECK THERMISTORS

Next: !p1235, f1236

INSPECT FAN VENTURI AND PIPE WORK (FAULT CODE)

Next: !p1307, ?1310, ?1312

CALIBRATION THERMISTOR CASTING

Next: !p1239, !f1240

RESISTANCE FAN AND HARNESS (FUSE FURTHER INVESTIGATION)

REMOVE EIGHT WAY CONNECTOR FROM PCB

Next: p1253, f1255

RESISTANCE GAS VALVE AND HARNESS (FUSE FURTHER INVESTIGATION)

REMOVE 4 WAY GAS VALVE CONNECTOR FROM PCB

Next: p1258, f1259

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE EIGHT WAY CONNECTOR FROM PCB

Next: !p1321, f1261

INSPECTION SPARK GENERATOR

REMOVE THE CONNECTOR FROM THE SPARK GENERATOR

Next: p815, !f1286

INSPECTION SPARK GENERATOR

REMOVE THE CONNECTOR FROM THE SPARK GENERATOR

Next: p1298, !f1297

OBSERVATION REMOVE CONNECTOR FROM SPARK GENERATOR (FLASHING)

REMOVE THE CONNECTOR FROM THE SPARK GENERATOR AND MAKE SAFE
NO DEMAND

Next: !p1299, f1300

RESISTANCE HARNESS SPARK GENERATOR POWER FOR LED FAULT

REMOVE THE PLUG FROM THE SPARK GENERATOR AND THE 8 WAY PLUG FROM THE PCB

Next: !p1305, !f1306

INSPECTION SPARK GENERATOR

REMOVE THE CONNECTOR FROM THE SPARK GENERATOR

Next: p1347, !f1348

INSPECTION CONDENSATE PIPEWORK

Next: p1358, !f1340

CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p1341, ?1343, ?1345, ?1386

VOLTAGE PCB TO SPARK GENERATOR

{GAINPCBACS}

Next: p1349, !f1350

RESISTANCE HARNESS SPARK GENERATOR POWER

Next: p1351, !f1352

RESISTANCE HT LEAD

Next: !p1353, !f1354

INSPECT INJECTOR

Next: !p1356, !f1357

MAIN HEAT EXCHANGER CLEAR

REMOVE THE INTERNAL COMBUSTION COVER.

Next: p1339, !f1365

MAIN HEAT EXCHANGER CLEAR

REMOVE THE INTERNAL COMBUSTION COVER.

Next: p849, !f1385

MAIN HEAT EXCHANGER CLEAR

REMOVE THE INTERNAL COMBUSTION COVER.

Next: p436, !f150

CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p1380, ?1381, ?1383, ?1392

INSPECT INJECTOR

Next: !p1395, !f1396

GAS PRESSURE

ATTACH U-GAUGE TO THE BURNER PRESSURE TEST POINT OF THE GAS VALVE

Next: p167, !f212

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p171, f172

RESISTANCE CASTING THERMISTOR AND HARNESS

Next: p1394, f176

DIFFERENTIAL TEMPERATURE CHECK

Next: p182, f183

EXTERNAL BYPASS

Next: !p188, !f189

GAS INLET PRESSURE (BLIP TEST)

ATTACH A U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p282, ?283, ?285

IGNITION BURNER PRESSURE

ATTACH A U-GAUGE TO THE BURNER PRESSURE TEST POINT OF THE GAS VALVE

Next: p291, !f295

RESISTANCE GAS VALVE SOLENOID

Next: p287, !f845

VOLTAGE TO GAS VALVE

{GAINPCBACS}

Next: p328, !f846

INSPECT INJECTOR

Next: !p292, !f293

RESISTANCE GAS VALVE HARNESS

Next: !p331, !f330

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p345, f346

RESISTANCE CASTING THERMISTOR AND HARNESS

Next: p427, f350

VOLTAGE AT PUMP

LOCATE THE PUMP AND REMOVE ITS ELECTRICAL COMPARTMENT COVER

Next: !p379, !f380

CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: p428, ?455, ?457, ?1390

CONDENSATE TRAP

Next: p433, !f431

FLUE

Next: !p435, !f434

GAS INLET PRESSURE

ATTACH A U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p440, !f438

INSPECT AND CLEAN FAN IMPELLOR

Next: p441, !f442

INSPECT RUBBER GATOR CONNECTION

Next: p443, !f444

FLUE

Next: p445, !f446

CONDENSING HEAT EXCHANGER AND SUMP CLEAR

Next: !p448, ?450, ?452, ?1388

BURNER FULLY CROSS LIGHTS

Next: p466, f471

SENSING ELECTRODE GAP AND CONDITION

Next: p467, !f468

SENSING LEAD CONDITION

Next: !p469, !f470

VOLTAGE TO PUMP FROM PCB

{GAINPCBACS}

Next: p378, !f53

VOLTAGE AT PUMP

LOCATE THE PUMP AND REMOVE ITS ELECTRICAL COMPARTMENT COVER

Next: !p548, !f547

CONDENSATE TRAP

Next: p137, !f681

SPARK GENERATOR OUTPUT

Next: p281, f1331

MAINS POWER SUPPLY

REMOVE THE SCREW TO

Next: p811, f1269

INTERNAL FUSE

REMOVE THE FUSE FROM THE BOILERS MAIN TERMINAL STRIP

Next: p813, f1266

POWER AT PCB

{GAINPCBACS}

Next: p1276, !f816

OBSERVATION REMOVE CONNECTOR FROM SPARK GENERATOR

REMOVE THE CONNECTOR FROM THE SPARK GENERATOR AND MAKE SAFE
NO DEMAND

Next: !p817, f818

RESISTANCE HARNESS SPARK GENERATOR POWER FOR LED FAULT

REMOVE THE PLUG FROM THE SPARK GENERATOR AND THE 8 WAY PLUG FROM THE PCB

Next: !p823, !f824

INSPECT FAN VENTURI AND PIPE WORK

Next: p851, ?853, ?855

FLUE

Next: p857, !f858

INSPECT AND CLEAN FAN IMPELLOR

Next: p1379, !f860

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p877, f878

EXTERNAL BYPASS

Next: !p875, !f876

VOLTAGE AT PUMP

LOCATE THE PUMP AND REMOVE ITS ELECTRICAL COMPARTMENT COVER

Next: !p873, !f874

RESISTANCE CASTING THERMISTOR AND HARNESS

Next: !p881, f882

OBSERVATION FAULT CODE REAPPEAR OR IGNITION

Next: p897, f898

RESISTANCE CASTING THERMISTOR AND HARNESS

Next: !p893, f894

DIFFERENTIAL TEMPERATURE CHECK

Next: p903, ?905, ?907

CALIBRATION THERMISTOR FLOW

Next: p945, !f946

PUMP LIMPET TEST

Next: p927, f928

PUMP LIMPET TEST

Next: p909, f910

EXTERNAL BYPASS

Next: p915, !f916

VOLTAGE AT PUMP

LOCATE THE PUMP AND REMOVE ITS ELECTRICAL COMPARTMENT COVER

Next: !p913, !f914

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p917, f918

RESISTANCE OVER HEAT THERMOSTAT AND HARNESS

REMOVE THE 8 WAY CONNECTOR FROM THE PCB

Next: p921, f922

GAS PRESSURE

ATTACH U-GAUGE TO THE BURNER PRESSURE TEST POINT OF THE GAS VALVE

Next: !p925, !f926

EXTERNAL BYPASS

Next: p933, !f934

VOLTAGE AT PUMP

LOCATE THE PUMP AND REMOVE ITS ELECTRICAL COMPARTMENT COVER

Next: !p931, !f932

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p935, f936

RESISTANCE OVER HEAT THERMOSTAT AND HARNESS

REMOVE THE 8 WAY CONNECTOR FROM THE PCB

Next: p939, f940

GAS PRESSURE

ATTACH U-GAUGE TO THE BURNER PRESSURE TEST POINT OF THE GAS VALVE

Next: !p943, !f944

CALIBRATION THERMISTOR CASTING

Next: !p947, !f948

RESISTANCE SENSOR TEMP FLOW AND HARNESS

Next: p955, f956

DIFFERENTIAL CHECK THERMISTORS - THERMISTOR FAULT SHOWING

Next: p959, f960

CALIBRATION THERMISTOR FLOW

Next: p969, !f970

VOLTAGE TO PUMP FROM PCB

{GAINPCBACS}

Next: p965, !f966

VOLTAGE AT PUMP

LOCATE THE PUMP AND REMOVE ITS ELECTRICAL COMPARTMENT COVER

Next: !p967, !f968

CALIBRATION THERMISTOR CASTING

Next: !p971, !f972

RESISTANCE GAS VALVE SOLENOID

Next: !p1330, !f978

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