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:

GLOW WORM ULTRACOM HXI

GLOBALLY REPLACED

Next: &1, *

ONBOARD DIAGNOSTICS (NULL)

INTENTIONALLY BLANK

Next: &18, f1056

FAULT CODE (NULL)

INTENTIONALLY BLANK

Next: &734N, f728

FAULT CODE F6,10,11,13, 22, 25 (NULL)

INTENTIONALLY BLANK

Next: &881N, f756

FAULT CODE F14 (NULL)

INTENTIONALLY BLANK

Next: &1031, f774

FAULT CODE F70 (NULL)

INTENTIONALLY BLANK

Next: &1055N, !f1063

FAULT CODE F5 (NULL)

INTENTIONALLY BLANK

Next: &735N, f882

NO FAULT FOUND

Next: nff

GLOWWORM ULTRACOM HXI

CASE REMOVAL<

Next: &1260, !f3

POWER UP - DISPLAY SHOWS FLOW TEMPERATURE

Next: &594, ?506, ?508, ?574, ?669

FAN RUNS ON DEMAND FOR HEATING

Next: &154, ?471, ?473

BOILER IGNITES

Next: &240, ?155, ?157, ?1152

CH OPERATION

Next: &666, ?246, ?248, ?250

HOT WATER OPERATION

EXTERNAL DHW CONTROLS CALLING FOR HEAT

Next: &nff, !f333

PUMP RUNS ON HEATING DEMAND

Next: &137, f612

PUMP OVER RUN OPERATION

CH DEMAND OFF

Next: &331, f976

DIAGNOSTIC OPTIONS

PLEASE SELECT FROM O

Next: &727N, !f732

FAULT CODE F4 (NULL)

Next: &780N, f1032

HEADER FOR FUSE INVESTIGATION

INTENTIONALLY BLANK - HEADER FOR FUSE INVESTIGATION

Next: &nff, f1236

INSPECTION FLUE COLLECTOR AND SEALS

Next: &731, !f1261

FAULT CODE F6,10,11,13,25

PUMP WIRING

Next: End

NO POWER TO PUMP - FAULT CODE F6,10,11,13,25

PCB - MAIN - BMU

Next: End

FAULT CODE F5

CONDENSATE TRAP OR PIPEWORK

Next: End

FAULT CODE F5

VALVE - GAS

Next: End

FAULT CODE F5

Next: End

BURNER FAILS TO LIGHT

CABLE

Next: End

BOILER FAILS TO LIGHT

BURNER

Next: End

BURNER FAILS TO LIGHT

ELECTRODE

Next: End

MAIN HEAT EXCHANGER

HEAT EXCHANGER

Next: End

F4

ELECTRODE

Next: End

F4

TREE - CABLE - HARNESS

Next: End

FAULT CODE F4

VALVE - GAS

Next: End

F4

CONDENSATE TRAP OR PIPEWORK

Next: End

F4

GAS SUPPLY

Next: End

F70 FAULT CODE

PCB SETUP ASSISTANCE (DSN CODE)

Next: End

PCB DIAGNISTICS

Z REDIRECTION

Next: End

PCB DIAGNISTICS PASS

Z REDIRECTION

Next: End

PCB DIAGNISTICS PASS2

Z REDIRECTION

Next: End

GAS VALVE - NOT OPENING

TREE - CABLE - HARNESS

Next: End

BURNER FAILS TO LIGHT

CONDENSATE TRAP OR PIPEWORK

Next: End

BURNER FAILS TO LIGHT

FLUE

Next: End

LOW NOT ESTABLISHING

GAS SUPPLY

Next: End

BURNR NOT ESTABLISHING

CONDENSATE TRAP OR PIPEWORK

Next: End

BAFFLING

CONDENSATE TRAP OR PIPEWORK

Next: End

DROPPING OUT

FLUE

Next: End

BLOWING FUSE

PUMP

Next: End

BLOWING FUSE

TREE - CABLE - HARNESS

Next: End

BLOWING FUSE

VALVE - GAS

Next: End

NO DISPLAY - FUSE BLOWN

MAINS FUSE (FUSED SPUR)

Next: End

NO DISPLAY - NO VOLTS

FUSE - PACK OF 10

Next: End

SPLIT / LEAKING

FLUE COLLECTOR / SEALS

Next: End

HIGH RESISTANCE NOT RECTIFYING

TREE - CABLE - HARNESS

Next: End

NO FLAME REC SIGNAL

IGNITOR UNIT

Next: End

NOT RECTIFYING

CABLE

Next: End

HIGH RESISTANCE OR FAULTY NOT RECTIFYING

ELECTRODE

Next: End

DROPPING OUT

BURNER

Next: End

DROPPING OUT

HEAT EXCHANGER

Next: End

F4

FLUE

Next: End

F4

BURNER

Next: End

F4

HEAT EXCHANGER

Next: End

GAS VALVE NOT OPENING

THERMISTER - THERMOMETRIC

Next: End

GAS VALVE NOT OPENING

THERMISTER - THERMOMETRIC

Next: End

NO INLET PRESSURE

GAS SUPPLY

Next: End

CASE REMOVAL

Z REDIRECTION

Next: End

CH OP - SHUTS DOWN PREM

CONDENSATE TRAP OR PIPEWORK

Next: End

NOT RESPONDING TO HW DEMAND

Next: End

NOT RESPONDING TO CH

Next: End

NOT RESPONDING TO CH

THERMISTER - THERMOMETRIC

Next: End

NOT RESPONDING TO CH

THERMISTER - THERMOMETRIC

Next: End

RES WIRE FAULT - ALL SEGS FLASHING

PCB - MAIN - BMU

Next: End

RES WIRE FAULT - ALL SEGS FLASHING

HARNESS - APPLIANCE INTERFACE

Next: End

FAN - FULL SPEED ON POWER UP

TREE - CABLE - HARNESS

Next: End

NO DISPLAY - VOLTS OK

HARNESS - APPLIANCE INTERFACE

Next: End

DISPLAY PCB VOLTAGE

PCB - MAIN - BMU

Next: End

NOT RESPONDING TO CH

PCB - MAIN - BMU

Next: End

NOT RESPONDING TO CH

Next: End

NOT RESPONDING TO CH - PUMP NOT RUNNING

Next: End

FAN - RUNNING AT FULL SPEED

TREE - CABLE - HARNESS

Next: End

NO POWER TO PUMP - NOT RESPONDING TO CH

PCB - MAIN - BMU

Next: End

NO SIGNAL VOLTAGE

TREE - CABLE - HARNESS

Next: End

FAN - NOT RESPONDING TO CH

TREE - CABLE - HARNESS

Next: End

FAN RUNNING AT START UP

TREE - CABLE - HARNESS

Next: End

FIRING WITH NO DEMAND

Next: End

FIRING WITH NO DEMAND

THERMISTER - THERMOMETRIC

Next: End

FIRING WITH NO DEMAND

THERMISTER - THERMOMETRIC

Next: End

CH OP - BOILER AND SYSTEM COLD

PCB SETUP ASSISTANCE

Next: End

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

PCB - MAIN - BMU

Next: End

CH OP - BOILER HOT RADS COLD

Next: End

FAIL FAULT CODE

Z REDIRECTION

Next: End

FOR TYPE DIAG PROCEDURE

Z REDIRECTION

Next: End

FAULT CODE F6,10,11,13,25

HARNESS - APPLIANCE INTERFACE

Next: End

FAULT CODE F6,10,11,13,25

CABLE

Next: End

FAULT CODE F6,10,11,13,25

Next: End

FAULT CODE F6,10,11,13,25

THERMISTER - THERMOMETRIC

Next: End

FAULT CODE F14

VALVE - GAS

Next: End

FAULT CODE F5

PUMP

Next: End

FAULT CODE F5

Next: End

FAULT CODE F5

THERMISTER - THERMOMETRIC

Next: End

FAULT CODE F5

THERMISTER - THERMOMETRIC

Next: End

NO VOLTS TO SPARK GEN

PCB - MAIN - BMU

Next: End

HARNESS SPARK GENERATOR

TREE - CABLE - HARNESS

Next: End

CH OP - SHUTS DOWN PREM

THERMISTER - THERMOMETRIC

Next: End

CH OP - SHUTS DOWN PREM

THERMISTER - THERMOMETRIC

Next: End

CH OP - SHUTS DOWN PREM

DISPLAY LC ULTRACOM / ULTRAPOWER

Next: End

CH OP - SHUTS DOWN PREM

FLUE

Next: End

CH OP - BOILER AND SYSTEM COLD

DISPLAY LC ULTRACOM / ULTRAPOWER

Next: End

CH OP - BOILER AND SYSTEM COLD

THERMISTER - THERMOMETRIC

Next: End

CH OP - BOILER AND SYSTEM COLD

THERMISTER - THERMOMETRIC

Next: End

NOT WIRED TO BOILER

PUMP WIRING

Next: End

FAULT CODE F6,10,11,13,25

THERMISTER - THERMOMETRIC

Next: End

FAULT CODE F6,10,11,13,25

HOUSING - INSTALLER

Next: End

FAULT CODE F5

PCB - MAIN - BMU

Next: End

F4

PCB - MAIN - BMU

Next: End

FAULT CODE F4

TREE - CABLE - HARNESS

Next: End

PCB DIAGNISTICS FAIL

Z REDIRECTION

Next: End

NO PRESSURE DROP ON IGN

VALVE - GAS

Next: End

INCORRECT MIX WONT LIGHT

VALVE - GAS

Next: End

BLOWING FUSE

HOUSING - INSTALLER

Next: End

BLOWING FUSE

IGNITOR UNIT

Next: End

BLOWING FUSE

TREE - CABLE - HARNESS

Next: End

PCB BLOWING FUSE

PCB FUSE BLOWN

Next: End

BLANK FOR MAINS FUSE INVESTIGATION

Z REDIRECTION

Next: End

BLANK FOR PCB FUSE INVESTIGATION

Z REDIRECTION

Next: End

NOT RECTIFYING

PCB - MAIN - BMU

Next: End

INCORRECT MIX BAFFLING

VALVE - GAS

Next: End

F4

IGNITOR UNIT

Next: End

DROPS COMPLETELY

GAS SUPPLY

Next: End

GAS RATE - BOILER AND RADS COLD

VALVE - GAS

Next: End

NO INLET DROP - NO POWER TO GAS VALVE

PCB - MAIN - BMU

Next: End

RETURN - GAS VALVE NOT OPENING

TREE - CABLE - HARNESS

Next: End

FLOW - GAS VALVE NOT OPENING

TREE - CABLE - HARNESS

Next: End

CH OP - SHUTS DOWN PREM

PCB - MAIN - BMU

Next: End

FLOW - NOT RESPONDING TO CH

TREE - CABLE - HARNESS

Next: End

RETURN - NOT RESPONDING TO CH

TREE - CABLE - HARNESS

Next: End

NO DISPLAY - NO MAINS POWER

Next: End

RES WIRE FAULT - ALL SEGS FLASHING

DISPLAY LC ULTRACOM / ULTRAPOWER

Next: End

AT FULL SPEED ON POWER UP

FAN

Next: End

HARNESS OK - VOLTS OK

DISPLAY LC ULTRACOM / ULTRAPOWER

Next: End

NOT RESPONDING TO HEATING

PUMP

Next: End

NOT RESPONDING TO CH

HOUSING - INSTALLER

Next: End

FAN RUNS AT FULL SPEED

PCB - MAIN - BMU

Next: End

RUNNING AT FULL SPEED

FAN

Next: End

NOT RESPONDING TO CH

FAN

Next: End

FAN NOT RUNNING - NO SIGNAL VOLTAGE

PCB - MAIN - BMU

Next: End

FAN AT FULL SPEED ON POWER UP

PCB - MAIN - BMU

Next: End

FIRING WITH NO DEMAND

PCB - MAIN - BMU

Next: End

RETURN - FIRING WITH NO DEMAND

TREE - CABLE - HARNESS

Next: End

FLOW - FIRING WITH NO DEMAND

TREE - CABLE - HARNESS

Next: End

FAIL LIMPET - BOILER HOT SYSTEM COLD

PUMP

Next: End

CH OP - BOILER HOT RADS COLD

Next: End

CH OP - BOILER HOT RADS COLD 2

Next: End

PASS FAULT CODE

Z REDIRECTION

Next: End

FAULT CODE F6,10,11,13,25 - FLOW

TREE - CABLE - HARNESS

Next: End

FAULT CODE F14

TREE - CABLE - HARNESS

Next: End

FAULT CODE F14

PCB - MAIN - BMU

Next: End

FAULT CODE F5

TREE - CABLE - HARNESS

Next: End

FAULT CODE F5 - RETURN

TREE - CABLE - HARNESS

Next: End

POWER IN - NO SPARK

IGNITOR UNIT

Next: End

FLOW - CH OP - SHUTS DOWN PREM

TREE - CABLE - HARNESS

Next: End

RETURN - CH OP - SHUTS DOWN PREM

TREE - CABLE - HARNESS

Next: End

FLOW - CH OP - BOILER AND SYSTEM COLD

TREE - CABLE - HARNESS

Next: End

CH OP - BOILER AND SYSTEM COLD

PCB - MAIN - BMU

Next: End

RETURN - CH OP - BOILER AND SYSTEM COLD

TREE - CABLE - HARNESS

Next: End

PCB - PUMP OVER RUN

PCB - MAIN - BMU

Next: End

FAULT CODE F6,10,11,13,25

PCB - MAIN - BMU

Next: End

FAULT CODE F6,10,11,13,25 - RETURN

TREE - CABLE - HARNESS

Next: End

FAULT CODE F6,10,11,13,25

Next: End

FAULT CODE F6,10,11,13,25

PUMP

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM BOILER IGNITES

Next: p1154

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM BOILER IGNITES

Next: p1082

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

CHARACTERISTIC TEST FROM BOILER IGNITES

Next: p158

INLET PRESSURE DOES NOT MOVE

CHARACTERISTIC TEST FROM GAS INLET PRESSURE DROPS

Next: p195

INLET PRESSURE DROPS AWAY COMPLETELY

CHARACTERISTIC TEST FROM GAS INLET PRESSURE DROPS

Next: !p197

BOILER AND SYSTEM COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p253

BOILER HOT/ NOISY SYSTEM COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p698

BOILER SHUTS DOWN PREMATURLY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p283

FAN CYCLING - FULL SPEED FOR APPROX 20SEC THEN SLOW

CHARACTERISTIC TEST FROM FAN RUNS ON DEMAND FOR HEATING

Next: p496

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM FAN RUNS ON DEMAND FOR HEATING

Next: p475

NO DISPLAY

CHARACTERISTIC TEST FROM POWER UP - DISPLAY SHOWS FLOW TEMPERATURE

Next: p512

DISPLAY ON BUT BACK LIGHT IS FLASHING (MAY SHOW ER)

CHARACTERISTIC TEST FROM POWER UP - DISPLAY SHOWS FLOW TEMPERATURE

Next: p538

DISPLAY OK, FAN RUNS AT FULL SPEED BOILER NOT TRYING TO LIGHT

CHARACTERISTIC TEST FROM POWER UP - DISPLAY SHOWS FLOW TEMPERATURE

Next: p575

DISPLAY OK, BUT BOILER FIRING WITHOUT DEMAND

CHARACTERISTIC TEST FROM POWER UP - DISPLAY SHOWS FLOW TEMPERATURE

Next: p670

17/12/2020 11:31:05 2012_1_50_1 23/02/2021 09:22:28

22/12/2020 11:17:50

Next: End

IONISATION VOLTAGE CHECK

{GAINPCBACS}
CH DEMAND OFF

Next: p1033, f1034

SPARK ELECTRODE GAP AND CONDITION

Next: p1035, !f1036

RESISTANCE GAS VALVE SOLENOID

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1041, !f1042

USING THE ONBOARD DIAGNOSTICS

Next: p1065, !f1070

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR X10 FROM THE PCB

Next: p1237, f1239

RESISTANCE PUMP

GAIN ACCESS TO PUMP ELECTRICAL CONNECTIONS

Next: !p1242, !f1243

RESISTANCE SPARK GENERATOR HARNESS

Next: !p1244, !f1245

RESISTANCE GAS VALVE (FUSE INVESTIGATION)

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1246, !f1247

FUSE FURTHER INVESTIGATION (MAINS FUSE)

THE INFORMATION PROV

Next: !p1250, !f1251

FUSE FURTHER INVESTIGATION (PCB)

THE INFORMATION PROV

Next: !p1253, !f1254

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p229, f220

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p312, !f228

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO CONNECTORS (ONE BLACK WIRE AND ONE BLUE)
FROM THE THERMISTOR

Next: !p311, !f235

CHECK DSN AND PART LOAD SETTINGS

Next: !p266, !f692

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p955, !f956

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p480, !f481

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO CONNECTORS (ONE BLACK WIRE AND ONE BLUE)
FROM THE THERMISTOR

Next: !p484, !f485

RESISTANCE MAINS FUSE (3AMP)

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p515, f1249

RESISTANCE HARNESS FAN

DISCONNECT X20 FROM THE PCB
DISCONNECT THE CONNECTOR FROM THE FAN

Next: !p583, !f584

VOLTAGE AT PUMP

REMOVE THE COVER FROM THE PUMP

Next: !p613, f617

POWER INPUT POLARITY CHECK

{GAINPCBACS}

Next: p618, !f619

RESISTANCE HARNESS FAN

DISCONNECT X20 FROM THE PCB
DISCONNECT THE CONNECTOR FROM THE FAN

Next: !p634, !f635

RESISTANCE HARNESS FAN

DISCONNECT X20 FROM THE PCB
DISCONNECT THE CONNECTOR FROM THE FAN

Next: !p651, !f652

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO CONNECTORS (ONE BLACK WIRE AND ONE BLUE)
FROM THE THERMISTOR

Next: !p685, !f686

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p688, !f689

PUMP LIMPET TEST

Next: !p709, f701

VOLTAGE PCB TO PUMP

Next: !p702, !f703

FAULT CODE

Next: !p729, !f730

RESISTANCE/ CONNECTIONS MAIN PCB TO DISPLAY PCB

REMOVE ONE END OF THE HARNESS LINKING THE DISPLAY PCB TO THE MAIN PCB (X51)

Next: p757, !f764

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p769, !f771

RESISTANCE GAS VALVE SOLENOID AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p779, f776

RESISTANCE GAS VALVE SOLENOID

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p778, !f880

PUMP LIMPET TEST

Next: p883, !f884

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p889, !f890

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO CONNECTORS (ONE BLACK WIRE AND ONE BLUE)
FROM THE THERMISTOR

Next: !p893, !f894

VOLTAGE TO SPARK GENERATOR

{GAINPCBACS}
ENSURE THE METER IS SET TO FULL RANGE MODE.

Next: p914, !f915

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p957, !f958

RESISTANCE SENSOR TEMP FLOW

LOCATE THE FLOW THER

Next: !p970, !f971

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO CONNECTORS (ONE BLACK WIRE AND ONE BLUE)
FROM THE THERMISTOR

Next: !p974, !f975

PUMP WIRED TO BOILER

Next: !p977, !f978

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO CONNECTORS (ONE BLACK WIRE AND ONE BLUE)
FROM THE THERMISTOR

Next: !p993, !f994

PUMP LIMPET TEST

Next: !p997, f996

VOLTAGE AT PUMP

REMOVE THE COVER FROM THE PUMP

Next: !p998, f999

PUMP WIRED TO BOILER

Next: p1000, !f1001

VOLTAGE PCB TO PUMP

Next: !p1002, !f1003

GAS RATE

Next: p1006, !f1007

DIFFERENTIAL TEMPERATURE CHECK

Next: !p1008, !f1009

RESISTANCE/ CONNECTIONS SPARK LEAD

DISCONNECT THE HT LEAD FROM BOTH THE SPARK ELECTRODE AND GENERATOR

Next: p1022, !f1021

BURNER CONDITION

Next: p1023, !f1024

SPARK ELECTRODE GAP AND CONDITION

Next: p1025, !f1026

HEAT EXCHANGER FLUEWAYS

Next: !p1151, !f1028

RESISTANCE GAS VALVE SOLENOID AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p1039, f1040

RESISTANCE SPARK GENERATOR HARNESS

Next: !p1037, !f1038

CONDENSATE PIPE

Next: p1043, !f1044

INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT ON GAS VALVE

Next: p1276, !f1046

USEFUL PCB DIAGNOSTIC INFORMATION

Next: p1066, !f1067

STATUS CODE INFORMATION

Next: !p1068, !f1069

RESISTANCE HARNESS GAS VALVE

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: !p1079, !f1078

CONDENSATE PIPE

Next: p1118, !f1117

INSPECTION FLUE

Next: p190, !f1150

INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT ON GAS VALVE

Next: p1181, !f1156

CONDENSATE PIPE

Next: p1262, !f1182

CONDENSATE PIPE

Next: p1214, !f1212

INSPECTION FLUE

Next: p1271, !f1234

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE CONNECTOR X21 FROM THE PCB

Next: p1238, f1240

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p1248, f1241

RESISTANCE SPARK GENERATOR HARNESS

Next: p1263, !f1264

RESISTANCE SPARK GENERATOR (RECTIFICATION PATH)

REMOVE WIRES FROM SPARK GENERATOR

Next: p1265, !f1266

RESISTANCE/ CONNECTIONS SPARK LEAD

DISCONNECT THE HT LEAD FROM BOTH THE SPARK ELECTRODE AND GENERATOR

Next: p1267, !f1268

SPARK ELECTRODE GAP AND CONDITION

Next: !p1269, !f1270

BURNER CONDITION

Next: p1272, !f1273

HEAT EXCHANGER FLUEWAYS

Next: !p1274, !f1275

FLUE

Next: p1277, !f1278

BURNER CONDITION

Next: p1279, !f1280

HEAT EXCHANGER FLUEWAYS

Next: !p1281, !f1282

INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT ON GAS VALVE

Next: p1204, !f236

GAS INLET PRESSURE DROPS

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p911, ?194, ?196

VOLTAGE TO GAS VALVE

{GAINPCBACS}

Next: p1076, f219

RESISTANCE SENSOR TEMP RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p279, f230

GAS RATE

Next: p964, f264

CONFIRM USER TEMPERATURE SETTING ON PCB

Next: p284, !f959

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p322, f289

RESISTANCE SENSOR TEMP RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p323, f951

CONDENSATE PIPE

Next: p326, !f325

FLUE

Next: !p328, !f960

EXTERNAL CONTROLS INTO BOILER

{GAINPCBACS}

Next: p476, !f477

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p478, f479

RESISTANCE SENSOR TEMP RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p598, f483

VOLTAGE FAN CONTROL SIGNAL - FAN CYCLING ON DEMAND

{GAINPCBACS}

Next: !p632, f633

MAINS POWER INPUT TO APPLIANCE

{GAINPCBACS}

Next: p585, f514

MAIN PCB TO DISPLAY PCB VOLTS

{GAINPCBACS}

Next: p539, !f540

RESISTANCE HARNESS MAIN PCB TO DISPLAY PCB

REMOVE ONE END OF THE HARNESS LINKING THE DISPLAY PCB TO THE MAIN PCB (X51)

Next: !p541, !f542

VOLTAGE FAN CONTROL - RUNNING FULL SPEED AT POWER UP

{GAINPCBACS}

Next: p654, f582

RESISTANCE PCB FUSE

Next: p589, f1252

MAIN PCB TO DISPLAY PCB VOLTS

{GAINPCBACS}

Next: p590, !f593

RESISTANCE HARNESS MAIN PCB TO DISPLAY PCB

REMOVE ONE END OF THE HARNESS LINKING THE DISPLAY PCB TO THE MAIN PCB (X51)

Next: !p591, !f592

VOLTAGE FAN POWER SUPPLY

Next: p599, !f600

VOLTAGE FAN CONTROL SIGNAL - FAN NOT RUNNING

Next: p647, f641

EXTERNAL CONTROLS INTO BOILER

{GAINPCBACS}

Next: p626, !f620

VOLTAGE PCB TO PUMP

Next: !p629, !f638

RESISTANCE HARNESS FAN

DISCONNECT X20 FROM THE PCB
DISCONNECT THE CONNECTOR FROM THE FAN

Next: !p650, !f653

RESISTANCE HARNESS FAN

DISCONNECT X20 FROM THE PCB
DISCONNECT THE CONNECTOR FROM THE FAN

Next: !p655, !f656

EXTERNAL FROST THERMOSTAT

{GAINPCBACS}
ENSURE THERE IS NO DEMAND FROM THE EXTERNAL CONTROLS

Next: p672, !f671

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p682, f687

RESISTANCE SENSOR TEMP RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p683, f684

DIFFERENTIAL TEMPERATURE CHECK

Next: p706, f699

EXTERNAL BYPASS SET CORRECTLY

Next: !p707, !f708

RESISTANCE/ CONNECTIONS SPARK LEAD

DISCONNECT THE HT LEAD FROM BOTH THE SPARK ELECTRODE AND GENERATOR

Next: p758, !f765

EARTHING CHECK

Next: p761, !f766

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p760, f768

RESISTANCE SENSOR TEMP RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p991, f992

DIFFERENTIAL TEMPERATURE CHECK

Next: p759, f995

EXTERNAL BYPASS SET CORRECTLY

Next: p885, !f886

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p887, f888

RESISTANCE SENSOR TEMP RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p891, f892

CONDENSATE PIPE

Next: p1005, !f1004

SPARK GENERATOR OUTPUT

REMOVE BOTH LEADS FR

Next: p1020, f913

RESISTANCE SPARK GENERATOR HARNESS

Next: !p916, !f917

CONFIRM USER TEMPERATURE SETTING ON PCB

Next: p967, !f966

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p968, f969

RESISTANCE SENSOR TEMP RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p972, f973

System Information

  • Total Tests: 304
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control