XSol Diagnostic System

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:

BRITISH GAS / BOSCH ICS1 - ZSBR 7-28A

WARNING - IMPORTA

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

BRITISH GAS/BOSCH ICS1 - ZSBR 7 -28A

{GAINPCBACS}
G.C.

Next: &3, !f2

OPERATIONAL SEQUENCE

Next: &524, !f410

DHW FAN RUNS

CH TEMPERATURE SELECTOR TO OFF POSITION

Next: &1113, f1436

SYSTEM PRESSURE RISE

CH TEMPERATURE SELECTOR TO HIGH POSITION

Next: &202, !f367

CH OPERATION

CH THERMOSTAT TO MAX

Next: &1604, ?204, ?206, ?357, ?375

CH MODULATION

ENSURE ALL HEATING CONTROLS ARE CALLING FOR HEAT
DHW TEMP SELECTOR TO MINIMUM

Next: &nff, f368

FAULT CODES

Next: &27, !f525

DHW BURNER IGNITES

CH TEMPERATURE SELEC

Next: &1246, ?767, ?769, ?1376

FAULT CODE A7

NOT USED

Next: &nff, f901

FAULT CODE B1

NOT USED

Next: &nff, f909

FAULT CODE C1

NOT USED

Next: &nff, f915

FAULT CODE D3

NOT USED

Next: &nff, f964

FAULT CODE E2

NOT USED

Next: &nff, f970

FAULT CODE E9

NOT USED

Next: &nff, f979

FAULT CODE F7 & FA

NOT USED

Next: &nff, f990

FAULT CODE A8

NOT USED

Next: &nff, f1064

FAULT CODE AC

NOT USED

Next: &nff, f1226

FAULT CODE FO

NOT USED

Next: &nff, f1233

FAULT CODE FD

NOT USED

Next: &nff, f1006

FAULT CODE P1 - P2 - P3

NOT USED

Next: &nff, f1035

FAULT CODE A1

NOT USED

Next: &nff, f1010

CH BURNER IGNITION

CENTRAL HEATING THER

Next: &188, f1086

DHW PUMP RUNS

CH TEMPERATURE SELECTOR TO OFF POSITION

Next: &762, f1124

OBSERVATION FAN PRESSURE (MAX)

ATTACH F.G.A UNIT TO

Next: &1085, f1248

FAULT CODE FC

NOT USED

Next: &nff, f1368

DHW OPERATION

CH TEMPERATURE SELECTOR TO OFF POSITION

Next: &187, ?1605, ?1607, ?1609, ?1611

FAULT CODE FD

PCB

Next: End

FAULT CODE A1

SYSTEM PRESSURE

Next: End

FAULT CODE A1 2

PCB

Next: End

FAULT CODE F7

GAS VALVE

Next: End

FAULT CODE P1-P2-P3

PCB

Next: End

FAULT CODE P1-P2-P3

FUSE 6A T1

Next: End

FAULT CODE P1-P2-P3

TRANSFORMER

Next: End

FAULT CODE F7 &FA

SYPHON

Next: End

FAULT CODE A8

PCB

Next: End

FAULT CODE A8

WIRING HARNESS (TR2)

Next: End

EXTERNAL CONTROL FUNCTION

PCB

Next: End

DAMAGED

HANDLES - ROTARY (CH)

Next: End

CH BURNER IGNITION

WIRING HARNESS (TR2)

Next: End

DHW PUMP RUNS 2

PCB

Next: End

DHW PUMP RUNS SINGLE

PCB

Next: End

FAULT CODE A1 3

PCB

Next: End

FAULT CODE A1 4

PCB

Next: End

FAULT 2

PUMP ASSEMBLY

Next: End

EFFICIENCY 2

PUMP ASSEMBLY

Next: End

FAULT CODE AC

HARNESS - PCB TO DISPLAY

Next: End

FAULT CODE AC

WIRING HARNESS (TR2)

Next: End

FAULT CODE AC

PCB

Next: End

FAULT CODE FO

Next: End

FAULT CODE FO

LEAD - HT - IGNITION

Next: End

FAULT CODE FO

HARNESS - MAIN

Next: End

FAULT FO

PCB

Next: End

FAULT CODE FO

Z REDIRECTION

Next: End

FAN PRESSURE TEST MAX

FLUE

Next: End

FAN PRESSURE TEST MAX

FLUEWAYS

Next: End

FAN PRESSURE TEST MAX

PLATE - BEARING

Next: End

FAULT CODE OVERHEAT

SYSTEM PRESSURE

Next: End

FAULT CODE OVERHEAT

PCB

Next: End

FAULT CODE OVERHEAT 2

PCB

Next: End

FAULT CODE A1 2

PUMP ASSEMBLY

Next: End

FAULT CODE E9

PUMP ASSEMBLY

Next: End

LOW 2

GAS INLET PRESSURE

Next: End

BLOCKED

SYPHON

Next: End

BLOCKAGE 2

FLUE

Next: End

FAULT

SET - ELECTRODES (FLAME SENSE)

Next: End

DHW PUMP RUNS - RESISTANCES

PUMP VARIABLE SPEED

Next: End

FAULT CODE A1 - RESISTANCE

PUMP VARIABLE SPEED

Next: End

FAULT CODE E9 - RESISTANCE

PUMP VARIABLE SPEED

Next: End

FAULT CODE FC

PCB

Next: End

FAULT CODE FC

HARNESS - PCB TO DISPLAY

Next: End

FAN RUNS THEN SLOWS

DHW SENSOR

Next: End

IGNITES BUT BAFFLES

SYPHON

Next: End

IGNITES BUT BAFFLES

GAS INLET PRESSURE

Next: End

IGNITES BUT BAFFLES

FLUE

Next: End

IGNITES BUT BAFFLES

FLUEWAYS

Next: End

IGNITES BUT BAFFLES

PLATE - BEARING

Next: End

IGNITES BUT BAFFLES

LIMITER - AIR

Next: End

IGNITES BUT BAFFLES

PIPE - GAS

Next: End

IGNITES BUT BAFFLES - PRESSURE OK

FLUE

Next: End

FAULT CODE F7 FA

PLATE - BEARING (FAN SPEED)

Next: End

CH BURNER IGNITION

INTEGRAL PROGRAMMER / MODULE

Next: End

EXTERNAL CONTROL FUNCTION WITH PROGRAMMER

PCB

Next: End

DAMAGED WITH PROGRAMMER

HANDLES - ROTARY (CH)

Next: End

BLOWN

PACK - 10 OFF FUSE 5A 20MM - T2

Next: End

FAULT

Next: End

FUSE F3

FUSE 6A T1

Next: End

FAULTY

TRANSFORMER

Next: End

BLOWN

FUSE 500MA T0

Next: End

BOILER HEATS SYSTEM COOL

PUMP ASSEMBLY

Next: End

FAULT CODE E9

Next: End

FAULT CODE E9

SENSOR - TEMPERATURE

Next: End

FAULT CODE E9 2

OVERHEAT THERMOSTAT

Next: End

FAULT CODE E9

SEALS

Next: End

MECHANICAL 3

DIVERTER VALVE - 3 WAY

Next: End

ADJUSTMENT 2

Next: End

DV FUNCTION 3

PCB

Next: End

NO PROGRAMMEROC/SC

SENSOR - TEMPERATURE

Next: End

NO PROGRAMMERFAN NOT RUNNING

DHW SENSOR

Next: End

NO PROGRAMMERFAULTY

CODE PLUG

Next: End

DHW FAN RUNS NO PROGRAMMER

HANDLES - ROTARY (DHW)

Next: End

NO PROGRAMMERFAN VOLTAGE

PCB

Next: End

NO PROGRAMMERFAN OPERATION

PCB

Next: End

NO PROGRAMMERDAMAGED

HARNESS - FAN

Next: End

OC/SC

SENSOR - TEMPERATURE

Next: End

FAN NOT RUNNING

DHW SENSOR

Next: End

FAULTY

CODE PLUG

Next: End

DHW FAN RUNS PROGRAMMER

HANDLES - ROTARY (DHW)

Next: End

FAN VOLTAGE

PCB

Next: End

FAN OPERATION

PCB

Next: End

DAMAGED

HARNESS - FAN

Next: End

FAULT CODE D3

DHW SENSOR

Next: End

CALIBRATION 2

DHW SENSOR

Next: End

DHW TOO HOT

PCB

Next: End

DHW TOO HOT

HARNESS - MAIN

Next: End

CALIBRATION 2

SENSOR - TEMPERATURE

Next: End

DV FUNCTION 2

PCB

Next: End

DIVERTER NOT OPERATING

HARNESS - MAIN

Next: End

DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

DHW NOISEY

SYSTEM PRESSURE

Next: End

EFFICIENCY 3

PUMP ASSEMBLY

Next: End

CH OPERATION NOISY

SYSTEM PRESSURE

Next: End

DHW OPERATION TOO HOT

DIVERTER VALVE - 3 WAY

Next: End

CH OPERATION BOILER HOT RADS COOL

SYSTEM PRESSURE

Next: End

EFFICIENCY

PUMP ASSEMBLY

Next: End

DAMAGED

HANDLES - ROTARY (DHW)

Next: End

CH OPERATION BOILER HEATS RADS COOL

GAS INLET PRESSURE

Next: End

CALIBRATION

SENSOR - TEMPERATURE

Next: End

CALIBRATION

DHW SENSOR

Next: End

CH OPERATION SHUTS DOWN EARLY

HANDLES - ROTARY (CH)

Next: End

CH OPERATION LOW RATE

HANDLES - ROTARY (CH)

Next: End

OPERATION CH STAYS AT LOW RATE

SYPHON

Next: End

OPERATION CH STAYS AT LOW RATE

FLUE

Next: End

CH OPERATION LOW RATE

GAS INLET PRESSURE

Next: End

CH NOISY

HEAT EXCHANGER

Next: End

FAILED

ELECTRICAL SAFETY CHECKS

Next: End

ADJUSTMENT

Next: End

CALIBRATION 3

SENSOR - TEMPERATURE

Next: End

BLOCKED 4

SYPHON

Next: End

BLOCKAGE 4

FLUE

Next: End

PRESSURE

EXPANSION VESSEL

Next: End

CALIBRATION 4

SENSOR - TEMPERATURE

Next: End

CALIBRATION 5

SENSOR - TEMPERATURE

Next: End

OPERATIONAL SEQUENCE

SYSTEM CHECKS

Next: End

DIVERTER VALVE OPERATION CH

HARNESS - MAIN

Next: End

FAULT CODES

DIRECTION CHOICE OR CONTINUE

Next: End

OC

OVERHEAT THERMOSTAT

Next: End

OC

FLUE THERMOSTAT

Next: End

BLOCKED 2

SYPHON

Next: End

NO SPARKING

PCB AND LEAD - HT- IGNITION

Next: End

WEAK OR INCONSTANT SPARK

PCB AND LEAD - HT- IGNITION

Next: End

BURNER DOES NOT IGNITE

PCB

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

BURNER DOES NOT IGNITE 2

FLUEWAYS

Next: End

BURNER DOES NOT IGNITE 2

PLATE - BEARING

Next: End

BURNER DOES NOT IGNITE 2

LIMITER - AIR

Next: End

ADJUSTMENT

PIPE - GAS

Next: End

SPARK ELECTRODE LEADS

LEAD - HT - IGNITION

Next: End

BLOCKAGE

FLUE

Next: End

BURNER DOES NOT IGNITE

FLUEWAYS

Next: End

BURNER DOES NOT IGNITE

PLATE - BEARING

Next: End

BURNER DOES NOT IGNITE

LIMITER - AIR

Next: End

NO PERMANENT RECTIFICATION VOLTAGE

HARNESS - MAIN

Next: End

FAULT

HARNESS - MAIN

Next: End

FAULT CODE C1 OCCURS

PCB

Next: End

FAULT CODE C1 OCCURS

HARNESS - FAN

Next: End

BURNER DOES NOT IGNITE

HARNESS - FAN

Next: End

BURNER DOES NOT IGNITE 2

HARNESS - FAN

Next: End

BURNER DOES NOT IGNITE 3

HARNESS - FAN

Next: End

BURNER DOES NOT IGNITE 5

PLATE - BEARING (FAN SPEED)

Next: End

BURNER DOES NOT IGNITE 4

PLATE - BEARING (FAN SPEED)

Next: End

BURNER DOES NOT IGNITE 3

PLATE - BEARING (FAN SPEED)

Next: End

FAULT CODE C1 OCCURS

PLATE - BEARING (FAN SPEED)

Next: End

FAULT CODE A7

DHW SENSOR

Next: End

FAULT CODE A7

PCB

Next: End

FAULT CODE B1

CODE PLUG

Next: End

FAULT CODE B1 2

CODE PLUG

Next: End

FAULT CODE C1 2

PCB

Next: End

FAULT CODE C1

PCB

Next: End

FAULT CODE C1

HARNESS - FAN

Next: End

FAULT CODE C1 3

HARNESS - FAN

Next: End

FAULT CODE C1 3

PLATE - BEARING (FAN SPEED)

Next: End

FAULT CODE C1 2

HARNESS - FAN

Next: End

FAULT CODE C1 2

PLATE - BEARING (FAN SPEED)

Next: End

FAULT CODE C1 4

HARNESS - FAN

Next: End

FAULT CODE C1

PLATE - BEARING (FAN SPEED)

Next: End

FAULT CODE D3

PCB

Next: End

FAULT CODE E2

SENSOR - TEMPERATURE

Next: End

FAULT CODE E2

PCB

Next: End

FAULT CODE E9

OVERHEAT THERMOSTAT

Next: End

FAULT CODE E9

FLUE THERMOSTAT

Next: End

FAULT CODE E9

PCB

Next: End

FAULT CODE F7

FLUE

Next: End

FAULT CODE F7

PCB WATER INGRESS

Next: End

FAULT CODE F7

SET - ELECTRODES

Next: End

FAULT CODE FD

FAULT CODE RESET

Next: End

FAULT CODE A1

FAULT CODE RESET

Next: End

FAULT CODE P1-P2-P3

FAULT CODE RESET

Next: End

FAULT CODE P1-P2-P3 2

PCB

Next: End

FAULT CODE F7

PCB

Next: End

FAULT CODE A8

FAULT CODE RESET

Next: End

FAULT CODE A8

CONTROL - ROOM TEMPERATURE

Next: End

FAULT CODE A8

FAULT CODE RESET (A8)

Next: End

SWITCHING

Next: End

CH FUNCTION

PCB

Next: End

CH BURNER IGNITION

CONTROL - ROOM TEMPERATURE

Next: End

DHW PUMP RUNS SINGLE

PUMP ASSEMBLY

Next: End

DOES PUMP RUN

PUMP VARIABLE SPEED

Next: End

FAULT CODE A1

PUMP ASSEMBLY

Next: End

FAULT CODE A1

PUMP VARIABLE SPEED

Next: End

CH NOISY

PUMP VARIABLE SPEED

Next: End

CH SHUTS DOWN

PUMP VARIABLE SPEED

Next: End

FAULT CODE AC

FAULT CODE RESET

Next: End

FAULT CODE FO

FAULT CODE RESET

Next: End

FAULT CODE FO 1

Z REDIRECTION

Next: End

FAN PRESSURE TEST MAX

FAN

Next: End

FAULT CODE OVERHEAT

PUMP ASSEMBLY

Next: End

FAULT CODE OVERHEAT

PUMP VARIABLE SPEED

Next: End

FAULT CODE A1 2

PUMP VARIABLE SPEED

Next: End

FAULT CODE E9

PUMP VARIABLE SPEED

Next: End

DAMAGED OR CHOKED 2

BURNER

Next: End

DHW PUMP RUNS

PCB

Next: End

FAULT CODE A1

PCB

Next: End

FAULT CODE OVERHEAT 3

PCB

Next: End

FAULT CODE FC

INTEGRAL PROGRAMMER / MODULE

Next: End

GASVALVE FUNCTION

PCB

Next: End

IGNITES BUT BAFFLES

FAN

Next: End

IGNITES BUT BAFFLES

GAS VALVE

Next: End

SWITCHING WITH PROGRAMMER

Next: End

CH FUNCTION WITH PROGRAMMER

PCB

Next: End

ON/OFF SWITCH FAULTY

PCB

Next: End

TX FUNCTION

PCB

Next: End

BOILER HEATS SYSTEM COOL

PUMP VARIABLE SPEED

Next: End

FAULT CODE E9 2

PCB

Next: End

FAULT CODE E9 2

FLUE THERMOSTAT

Next: End

FAULT CODE E9

FAULT CODE E9

Next: End

E9

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

CH CIRC

Next: End

NO PROGRAMMERFAULTY

FAN

Next: End

NO DHW

INTEGRAL PROGRAMMER / MODULE

Next: End

FAULTY

FAN

Next: End

DHW TOO HOT

MOTOR - DIVERTER VALVE

Next: End

DHW TEMP CONTROL

PCB

Next: End

MECHANICAL 2

DIVERTER VALVE - 3 WAY

Next: End

MECHANICAL

MOTOR - DIVERTER VALVE

Next: End

DHW NOISY

Next: End

DHW NOISY

PUMP VARIABLE SPEED

Next: End

CH NOISY

Next: End

DHW COOL RADS COOL

PUMP VARIABLE SPEED

Next: End

DHW TOO COOL RADS COOL

Next: End

MONITORING FUNCTION

PCB

Next: End

CH TEMP CONTROL

PCB

Next: End

CH MODULATION

PCB

Next: End

ELECTRICAL 2

MOTOR - DIVERTER VALVE

Next: End

FAULT FLUE STAT

HARNESS - MAIN

Next: End

SPARK FUNCTION

PCB

Next: End

SPARK FUNCTION 2

PCB

Next: End

LOW

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE 2

FAN

Next: End

BURNER DOES NOT IGNITE

GAS VALVE

Next: End

BURNER DOES NOT IGNITE

FAN

Next: End

MECHANICAL

GAS VALVE

Next: End

INCORRECT/DAMAGED

SET - ELECTRODES

Next: End

DAMAGED OR CHOKED

BURNER

Next: End

RECTIFICATION VOLTAGE OUT

PCB

Next: End

FLAME SENSE FUNCTION

PCB

Next: End

FAULT CODE C1 OCCURS

FAN

Next: End

BURNER DOES NOT IGNITE 2

PCB

Next: End

BURNER DOES NOT IGNITE 4

FAN

Next: End

BURNER DOES NOT IGNITE 3

FAN

Next: End

FAULT CODE A7

FAULT CODE RESET

Next: End

FAULT CODE B1

FAULT CODE RESET

Next: End

FAULT CODE C1

FAN

Next: End

FAULT CODE C1 2

FAN

Next: End

FAULT CODE C1 3

FAN

Next: End

FAULT CODE C1 3

PCB

Next: End

FAULT CODE C1

DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE D3

FAULT CODE RESET

Next: End

FAULT CODE E2

HARNESS - MAIN

Next: End

FAULT CODE E2

FAULT CODE RESET

Next: End

FAULT CODE E9

HARNESS - MAIN

Next: End

FAULT CODE F7

FAULT CODE RESET

Next: End

BURNER IGNITES BUT BAFFLES

CHARACTERISTIC TEST FROM DHW BURNER IGNITES

Next: p1377

BOILER GOES TO OVERHEAT BEFORE 88 °C

CHARACTERISTIC TEST FROM OBSERVATION RUN TO MAX TEMP - OVERHEAT OCCUR

Next: p1532

BOILER EXCEEDS 90 °C AND CONTINUES TO HEAT

CHARACTERISTIC TEST FROM OBSERVATION RUN TO MAX TEMP - OVERHEAT OCCUR

Next: p1534

DHW NOISY (KETTLING)

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1606

BOILER HEATS BUT DHW DOES NOT, RADIATORS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1608

DHW DOES NOT HEAT, RADIATORS HOT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1610

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1612

CH NOISY (KETTLING)

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1653

BOILER HEATS UP BUT SYSTEM REMAINS COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1672

BOILER SHUTS DOWN BEFORE TEMPERATURE IS SATISFIED

CHARACTERISTIC TEST FROM CH OPERATION

Next: p358

BOILER STAYS AT LOW RATE / INSUFFICIENT OUTPUT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p376

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM DHW BURNER IGNITES

Next: p768

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM DHW BURNER IGNITES

Next: p770

FAN RUNS THEN SLOWS DOWN, REMAINS SLOW AND EVENTUALLY STOPS

CHARACTERISTIC TEST FROM ? MODE OF FAN OPERATION

Next: p773

WEAK OR INCONSISTANT SPARK OBSERVED

CHARACTERISTIC TEST FROM SPARKING ELECTRODE LEADS

Next: p786

NO SPARKING OBSERVED

CHARACTERISTIC TEST FROM SPARKING ELECTRODE LEADS

Next: p788

INLET PRESSURE DOES NOT DIP

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: p796

INLET PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: !p798

ELECTRODE ASSEMBLY POOR CONDITION AND/OR GAP INCORRECT

CHARACTERISTIC TEST FROM INSPECTION BURNER AND ELECTRODE ASSEMBLY

Next: !p828

BURNER DAMAGED AND/OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION BURNER AND ELECTRODE ASSEMBLY

Next: !p830

FAULT CODE C1 OCCURS ( CAN TAKE UP TO 6 MINS)

CHARACTERISTIC TEST FROM ? MODE OF FAN OPERATION

Next: p849

FAN RUNS DIFFERENTLY THAN OTHER OPTIONS

CHARACTERISTIC TEST FROM ? MODE OF FAN OPERATION

Next: p859

VOLTAGE BELOW 124 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p864

VOLTAGE ABOVE 135 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p866

VOLTAGE BELOW 124 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p947

VOLTAGE ABOVE 135 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p949

01/12/2017 10:03:24 1709_2_50_1 09/01/2018 08:33:26

01/12/2017 10:58:42

Next: End

NO PROGRAMMER

PCB

Next: End

RESET BOILER - FAULT CODE PRESENT

Next: !p1007, !f1008

INSPECTION SYSTEM PRESSURE

Next: p1011, !f1015

TRANSFORMER 24 VOLTS

{GAINPCBACS}

Next: p1042, f1047

FUSE F3 (RESISTANCE)

REMOVE FUSE F3 FROM ITS HOLDER

Next: p1048, !f1049

OBSERVATION PROGRAMMER FITTED

Next: p1065, f1066

RESET BOILER - FAULT CODE PRESENT

Next: !p1067, !f1068

INSPECTION HARNESS TR2 TO PCB

GAIN ACCESS TO WIRING CONNECTIONS FOR THE
TR2 ROOM STAT AND PROGRAMMER PCB

Next: !p1082, !f1080

INTEGRAL PROGRAMMER FITTED OR NOT

Next: p1087, f1089

EXTERNAL CONTROL VOLTAGE (OUTPUT)

{GAINPCBACS}

Next: p1100, f1097

EXTERNAL CONTROL VOLTAGE (INPUT)

{GAINPCBACS}

Next: !p1098, !f1099

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: p1125, f1139

PUMP VOLTAGE

Next: !p1149, !f1129

PUMP VOLTAGE (SINGLE SPEED)

Next: !p1146, !f1141

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: p1157, f1158

PUMP VOLTAGE (SINGLE SPEED)

Next: !p1159, !f1160

PUMP VOLTAGE

Next: !p1163, !f1164

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: !p1221, !f1222

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: !p1224, !f1225

RESISTANCE HARNESS TIMER/PROGRAMMER

DISCONNECT THE WIRING HARNESS BETWEEN THE MAIN PCB AND THE TIMER MODULE

Next: p1227, !f1228

OBSERVATION RESET FLASHING

Next: p1234, f1235

VOLTAGE POLARITY CHECK

{GAINPCBACS}

Next: p1236, !f1237

FLUE

Next: p1249, !f1250

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: !p1286, !f1287

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: p1275, f1276

PUMP VOLTAGE (SINGLE SPEED)

Next: !p1277, !f1278

PUMP VOLTAGE

Next: !p1281, !f1282

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: !p1284, !f1285

GAS INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1347, !f1348

VOLTAGE MAIN PCB TO DISPLAY

UNCLIP, DISCONNECT ELECTRICALLY AND REMOVE DISPLAY FROM APPLIANCE

Next: p1369, !f1370

FLUE

Next: p1385, !f1386

EXTERNAL CONTROL VOLTAGE (OUTPUT)

{GAINPCBACS}

Next: p1412, f1413

EXTERNAL CONTROL VOLTAGE (INPUT)

{GAINPCBACS}

Next: !p1414, !f1415

TRANSFORMER 24 VOLTS

{GAINPCBACS}

Next: p1437, f1438

ON/OFF SWITCH VOLTAGE

{GAINPCBACS}
BOILER ON/OFF SWITCH ON

Next: p1439, f1440

FUSE F1 (RESISTANCE)

REMOVE FUSE F1 FROM ITS HOLDER

Next: p1441, !f1442

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: !p1512, !f1513

SYSTEM BYPASS

Next: !p1541, !f1528

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: p1572, !f1573

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: p1588, !f1589

VOLTAGE DIVERTER VALVE DHW AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE AND MAKE SAFE

Next: p1617, !f1618

VOLTAGE DIVERTER VALVE DHW AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE AND MAKE SAFE

Next: p1625, !f1626

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: !p1647, !f1648

OBSERVATION SINGLE OR VARIABLE SPEED PUMP FITTED

{GAINPCBACS}

Next: !p1692, !f1693

VOLTAGE DIVERTER VALVE CH AT PCB

{GAINPCBACS}
REMO

Next: p459, !f1568

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: !p369, !f370

OH THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OH THERMOSTAT

Next: p777, !f778

FLUE

Next: p803, !f804

FLUE

Next: p817, !f818

FLAME SENSE LEAD INSPECTION

REMOVE THE FLAME SEN

Next: !p833, !f834

DHW SENSOR

REMOVE THE PLUG OF T

Next: p902, !f903

CODE PLUG

Next: p910, !f911

OBSERVATION FAN RUNS (FAULT CODE C1)

BOILER ON/OFF SWITCH OFF

Next: p918, f943

SPARKING ELECTRODE LEADS (FAULT CODE C1)

BOILER ON/OFF SWITCH

Next: !p962, f944

FAN VOLTAGE CONTROL (PCB)

BOILER ON/OFF SWITCH

Next: p945, ?946, ?948

DHW SENSOR

REMOVE THE PLUG OF T

Next: p965, !f1603

RESISTANCE PRIMARY FLOW SENSOR AND HARNESS

DISCONNECT CONNECTOR PLUG MARKED ST 16 FROM THE PCB

Next: p971, f972

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: !p973, !f974

OH CIRCUIT RESISTANCE

REMOVE CONNECTOR MARKED ST16 FROM PCB

Next: p986, f981

OH THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OH THERMOSTAT

Next: p982, !f983

FLUE

Next: p1053, !f992

INSPECTION ELECTRODE ASSEMBLY

Next: !p1052, !f998

PUMP RUNS

Next: p1016, f1156

PUMP TEST

CH TEMPERATURE SELEC

Next: p1025, f1283

RESET BOILER - FAULT CODE PRESENT

Next: !p1026, !f1027

INSTALLATION TIGHTNESS TEST

Next: p1398, !f1034

RESET BOILER - FAULT CODE PRESENT

Next: !p1043, !f1044

TRANSFORMER RESISTANCE

REMOVE TRANSFORMER F

Next: !p1050, !f1051

SYPHON

Next: p991, !f1063

INSPECTION MODE SELECTOR SWITCH (TR2)

LOCATE TR2 ROOM STAT

Next: !p1084, f1077

INTEGRAL PROGRAMMER

BOILER ON/OFF SWITCH

Next: p1405, f1411

CONTROL KNOB (CH)

Next: !p1101, !f1102

INSPECTION HARNESS TR2 TO PCB

GAIN ACCESS TO WIRING CONNECTIONS FOR THE
TR2 ROOM STAT AND PROGRAMMER PCB

Next: !p1111, !f1112

OBSERVATION REMOVE PUMP DC CONNECTOR

{GAINPCBACS}
REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE

Next: p1358, f1127

OBSERVATION REMOVE PUMP DC CONNECTOR

{GAINPCBACS}
REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE

Next: p1361, f1162

INSPECTION HARNESS TR2 TO PCB

GAIN ACCESS TO WIRING CONNECTIONS FOR THE
TR2 ROOM STAT AND PROGRAMMER PCB

Next: p1229, !f1230

RESET BOILER - FAULT CODE PRESENT

Next: !p1231, !f1232

HARD RESET PROCESS

Next: !p1244, !f1245

SPARK ELECTRODE LEADS

DISCONNECT ELECTRODE LEADS

Next: p1238, !f1239

FLAME SENSE LEAD INSPECTION

REMOVE THE FLAME SEN

Next: p1240, !f1241

RESET BOILER - FAULT CODE PRESENT

Next: !p1242, !f1243

INSPECTION BEARING PLATE

REMOVE AIR INTAKE HO

Next: p1251, !f1257

INSPECTION FLUEWAYS

REMOVE THE FRONT COVER FROM THE HEAT EXCHANGER

Next: !p1253, !f1256

INSPECTION SYSTEM PRESSURE

Next: p1264, !f1265

DHW PUMP RUNS

CH TEMPERATURE SELECTOR TO OFF POSITION

Next: p1266, f1274

PUMP TEST

CH TEMPERATURE SELEC

Next: p1524, f1269

OBSERVATION REMOVE PUMP DC CONNECTOR

{GAINPCBACS}
REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE

Next: p1364, f1280

SYPHON

Next: p1349, !f1350

FLUE

Next: p1351, !f1352

FLAME SENSE ELECTRODE

Next: !p1353, !f1354

RESISTANCE PUMP (VARIABLE SPEED)

DISCONNECT PUMP PLUGS FROM PCB

Next: !p1359, !f1360

RESISTANCE PUMP (VARIABLE SPEED)

DISCONNECT PUMP PLUGS FROM PCB

Next: !p1362, !f1363

RESISTANCE PUMP (VARIABLE SPEED)

DISCONNECT PUMP PLUGS FROM PCB

Next: !p1365, !f1366

RESISTANCE HARNESS PCB TO DISPLAY

DISCONNECT THE HARNESS BETWEEN THE PCB AND THE DISPLAY

Next: !p1371, !f1372

DHW SENSOR

REMOVE THE PLUG OF T

Next: !p1374, !f1375

SYPHON

Next: p1378, !f1379

GAS INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1382, !f1381

PRESSURE FAN (IGNITION)

ATTACH F.G.A UNIT TO FAN PRESSURE TEST POINT

Next: p1383, f1384

INSPECTION AIR INTAKE FAN

Next: p1391, !f1392

INSPECTION FLUEWAYS

REMOVE THE FRONT COVER FROM THE HEAT EXCHANGER

Next: p1387, !f1388

INSPECTION BEARING PLATE

REMOVE AIR INTAKE HO

Next: !p1389, !f1390

GAS FLOW REGULATOR

BOILER ON/OFF SWITCH OFF

Next: p1395, !f1394

FLUE

Next: !p1396, !f1397

INSPECTION BEARING PLATE

REMOVE AIR INTAKE HO

Next: p993, !f1404

OBSERVATION DISCONNECT TR2

CENTRAL HEATING THER

Next: p1110, !f1409

CONTROL KNOB (CH)

Next: !p1416, !f1417

FUSE F2 (RESISTANCE)

REMOVE FUSE F2 FROM ITS HOLDER

Next: p1569, !f1450

FUSE F3 (RESISTANCE)

REMOVE FUSE F3 FROM ITS HOLDER

Next: p1445, !f1446

MAINS POWER SUPPLY

{GAINPCBACS}

Next: !p1443, !f1444

TRANSFORMER RESISTANCE

REMOVE TRANSFORMER F

Next: !p1447, !f1448

PUMP TEST

CH TEMPERATURE SELEC

Next: p207, f1511

DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS
CH THERMOSTAT TO MAX

Next: p1525, f1526

OBSERVATION RUN TO MAX TEMP - OVERHEAT OCCUR

ATTACH TEMPERATURE P

Next: p1529, ?1531, ?1533

INSPECTION SEAL INTEGRITY

Next: !p1539, !f1540

OH THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OH THERMOSTAT

Next: !p1537, !f1538

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: !p1535, !f1536

DIVERTER VALVE BODY

REMOVE DIVERTER VALVE HEAD (IF NOT ALREADY REMOVED)

Next: p1543, !f1544

SYSTEM BYPASS

Next: !p1545, !f1546

INTEGRAL PROGRAMMER FITTED OR NOT

Next: p1570, f1571

INTEGRAL PROGRAMMER DHW

BOILER ON/OFF SWITCH

Next: !p1586, f1587

DHW SENSOR

REMOVE THE PLUG OF T

Next: p1574, !f1575

CODE PLUG

Next: p1576, !f1577

CONTROL KNOB DHW

Next: p1578, !f1579

FAN VOLTAGE

BOILER ON/OFF SWITCH OFF
DISCONNECT FAN CONNECTOR FROM THE PCB

Next: p1580, !f1581

VOLTAGE FAN SWITCHED

ON/OFF SWITCH OFF
Next: p1582, !f1583

FAN HARNESS

Next: !p1584, !f1585

DHW SENSOR

REMOVE THE PLUG OF T

Next: p1590, !f1591

CODE PLUG

Next: p1592, !f1593

CONTROL KNOB DHW

Next: p1594, !f1595

FAN VOLTAGE

BOILER ON/OFF SWITCH OFF
DISCONNECT FAN CONNECTOR FROM THE PCB

Next: p1596, !f1597

VOLTAGE FAN SWITCHED

ON/OFF SWITCH OFF
Next: p1598, !f1599

FAN HARNESS

Next: !p1600, !f1601

INSPECTION SYSTEM PRESSURE

Next: p1643, !f1644

INSPECTION SYSTEM PRESSURE

Next: p1689, !f1630

OBSERVATION DIVERTER VALVE HEAD DHW POSITION

REMOVE DIVERTER VALV

Next: !p1623, f1624

DHW SENSOR

REMOVE THE PLUG OF T

Next: p1613, !f1614

OBSERVATION DIVERTER VALVE HEAD DHW POSITION

REMOVE DIVERTER VALV

Next: p1667, f1616

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: !p1621, !f1622

RESISTANCE CHECK HARNESS DIVERTER VALVE

REMOVE THE DIVERTER

Next: !p1619, !f1620

RESISTANCE CHECK HARNESS DIVERTER VALVE

REMOVE THE DIVERTER

Next: !p1627, !f1628

PUMP TEST

CH TEMPERATURE SELEC

Next: !p1645, f1646

INSPECTION SYSTEM PRESSURE

Next: p205, !f1661

DHW OPERATION (CH NOISY)

Next: !p1664, !f1759

DIVERTER VALVE BODY

REMOVE DIVERTER VALVE HEAD (IF NOT ALREADY REMOVED)

Next: p1615, !f1671

INSPECTION SYSTEM PRESSURE

Next: p1700, !f1688

PUMP TEST

CH TEMPERATURE SELEC

Next: p1690, f1691

CONTROL KNOB DHW

Next: p1735, !f1695

GAS INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1717, !f1716

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: p1498, !f1733

DHW SENSOR

REMOVE THE PLUG OF T

Next: !p1736, !f1737

CONTROL KNOB (CH)

Next: p359, !f1746

CONTROL KNOB (CH)

Next: p1753, !f1748

SYPHON

Next: p1750, !f1751

FLUE

Next: !p1760, !f1752

GAS INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1749, !f1758

PUMP TEST

CH TEMPERATURE SELEC

Next: p280, f1220

OBSERVATION DIVERTER VALVE HEAD CH POSITION

BOILER CH THERMOSTAT

Next: p1542, f285

SYSTEM BYPASS

Next: p1662, !f283

PUMP TEST

CH TEMPERATURE SELEC

Next: p1738, f1223

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: p361, !f362

SYPHON

Next: p363, !f364

FLUE

Next: !p365, !f366

PRIMARY SENSOR

REMOVE THE ORANGE LEADS FROM THE PRIMARY SENSOR

Next: p1747, !f378

RESISTANCE CHECK HARNESS DIVERTER VALVE

REMOVE THE DIVERTER

Next: !p460, !f461

RECTIFICATION (VOLTAGE OUT)

BOILER ON/OFF SWITCH OFF

Next: p831, f832

MODE OF FAN OPERATION

Next: p771, ?772, ?848, ?858

SYPHON

Next: p781, !f782

OH CIRCUIT RESISTANCE

REMOVE CONNECTOR MARKED ST16 FROM PCB

Next: p1373, f776

FLUE THERMOSTAT RESISTANCE

REMOVE RED LEADS FROM THE FLUE TEMPERATURE THERMOSTAT

Next: !p779, !f780

SPARK GENERATOR OUTPUT

BOILER ON/OFF SWITCH

Next: p783, ?785, ?787

PRESSURE GAS INLET DROP

ATTACH U GAUGE TO INLET PRESSURE TEST POINT OF THE GAS VALVE

Next: p793, ?795, ?797

SPARK ELECTRODE LEADS

DISCONNECT ELECTRODE LEADS

Next: !p791, !f792

SPARK ELECTRODE LEADS

DISCONNECT ELECTRODE LEADS

Next: !p789, !f790

SPARK ELECTRODE LEADS

DISCONNECT ELECTRODE LEADS

Next: p813, !f814

GAS VALVE VOLTAGE

DISCONNECT THE PLUG

Next: p799, !f800

PRESSURE FAN (IGNITION)

ATTACH F.G.A UNIT TO FAN PRESSURE TEST POINT

Next: p801, f802

INSPECTION AIR INTAKE FAN

Next: p809, !f810

INSPECTION FLUEWAYS

REMOVE THE FRONT COVER FROM THE HEAT EXCHANGER

Next: p805, !f806

INSPECTION BEARING PLATE

REMOVE AIR INTAKE HO

Next: !p807, !f808

GAS FLOW REGULATOR

BOILER ON/OFF SWITCH OFF

Next: !p811, !f812

PRESSURE FAN (IGNITION)

ATTACH F.G.A UNIT TO FAN PRESSURE TEST POINT

Next: p815, f816

INSPECTION AIR INTAKE FAN

Next: p823, !f824

INSPECTION FLUEWAYS

REMOVE THE FRONT COVER FROM THE HEAT EXCHANGER

Next: p819, !f820

INSPECTION BEARING PLATE

REMOVE AIR INTAKE HO

Next: !p821, !f822

INSPECTION BURNER AND ELECTRODE ASSEMBLY

REMOVE THE BURNER AS

Next: !p825, ?827, ?829

RECTIFICATION (VOLTAGE IN)

BOILER ON/OFF SWITCH OFF

Next: p835, f1346

FLAME SENSE LEAD INSPECTION

REMOVE THE FLAME SEN

Next: !p845, !f846

FAN VOLTAGE

BOILER ON/OFF SWITCH OFF
DISCONNECT FAN CONNECTOR FROM THE PCB

Next: p853, !f852

FAN HARNESS

Next: p854, !f855

INSPECTION BEARING PLATE (FAN SPEED)

REMOVE AIR INTAKE HO

Next: !p856, !f883

FAN VOLTAGE CONTROL (PCB)

BOILER ON/OFF SWITCH

Next: p860, ?863, ?865

FAN HARNESS

Next: p871, !f862

FAN HARNESS

Next: p874, !f868

FAN HARNESS

Next: p877, !f870

INSPECTION BEARING PLATE (FAN SPEED)

REMOVE AIR INTAKE HO

Next: !p872, !f882

INSPECTION BEARING PLATE (FAN SPEED)

REMOVE AIR INTAKE HO

Next: !p875, !f881

INSPECTION BEARING PLATE (FAN SPEED)

REMOVE AIR INTAKE HO

Next: !p878, !f880

RESET BOILER - FAULT CODE PRESENT

Next: !p904, !f905

RESET BOILER - FAULT CODE PRESENT

Next: !p912, !f913

FAN VOLTAGE

BOILER ON/OFF SWITCH OFF
DISCONNECT FAN CONNECTOR FROM THE PCB

Next: p919, !f920

VOLTAGE FAN SWITCHED

ON/OFF SWITCH OFF
Next: p921, !f922

FAN HARNESS

Next: !p923, !f924

FAN HARNESS

Next: p958, !f959

FAN HARNESS

Next: p954, !f955

FAN HARNESS

Next: p950, !f951

INSPECTION BEARING PLATE (FAN SPEED)

REMOVE AIR INTAKE HO

Next: !p952, !f953

INSPECTION BEARING PLATE (FAN SPEED)

REMOVE AIR INTAKE HO

Next: !p956, !f957

INSPECTION BEARING PLATE (FAN SPEED)

REMOVE AIR INTAKE HO

Next: !p960, !f961

RESET BOILER - FAULT CODE PRESENT

Next: !p967, !f968

RESET BOILER - FAULT CODE PRESENT

Next: !p975, !f976

FLUE THERMOSTAT RESISTANCE

REMOVE RED LEADS FROM THE FLUE TEMPERATURE THERMOSTAT

Next: !p984, !f985

RESET BOILER - FAULT CODE PRESENT

Next: p1263, !f988

INSPECTION PCB (WATER INGRESS)

{GAINPCBACS}

Next: p1028, !f994

RESET BOILER - FAULT CODE F7 PRESENT

Next: !p995, f996

System Information

Total Tests: 524

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control