XSol Diagnostic System

VAILLANT ECOMAX PRO 18 AND 28E

GLOBALLY REPLACED

Next: &737, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

VAILLANT ECOMAX PRO

Next: &1747, !f2

FAN RUNS

Next: &857, ?513, ?558, ?1686

BURNER ESTABLISHES

Next: &93, f980

DHW OPERATION

Next: &761, ?94, ?96, ?98, ?100

CH OPERATION

ENSURE ALL HEATING CONTROLS ARE CALLING

Next: &999, ?141, ?143, ?145

DIRECTIONAL CHOICE

Next: &271, !f270

FAULT CODES

Next: &21, !f272

F19 FAULT CODE

Next: &nff, f329

F16 FAULT CODE

Next: &nff, f339

F6 FAULT CODE

OUT OF MODEL

Next: &nff, f343

F10 FAULT CODE

Next: &nff, f349

F8 / F12 FAULT CODE

HEADER FOR F8 / F12 FAULT CODE - OUTSIDE MODEL

Next: &nff, f355

OVERHEAT INVESTIGATION

OUT OF MODEL

Next: &nff, f361

F2 F3 FAULT CODE

OUT OF MODEL

Next: &nff, f1009

F11 / F13 FAULT CODE

HEADER FOR F11 / F13 FAULT CODE - OUTSIDE MODEL

Next: &nff, f1530

TEMP FAULT CODE

Next: &nff, f405

CASE OFF

Next: &1, !f738

DISPLAY SET UP

Next: &nff, !f746

COMBUSTION ANALYSIS MAX AND MIN

Next: &140, f1820

F17 FAULT CODE

OUT OF MODEL

Next: &nff, f774

FUSE INVESTIGATION IRIS

OUTSIDE MODEL

Next: &nff, f782

FUSE INVESTIGATION SYMS

OUTSIDE MODEL

Next: &nff, f802

F14 FLOW ABOVE 95 DEG

OUT OF MODEL

Next: &nff, f1162

BURNER IGNITION

Next: &85, ?858, ?860, ?862

BOILER SHUT DOWN

ENSURE ALL HEATING CONTROLS ARE CALLING

Next: &nff, f1000

F18 FAULT CODE

HEADER FOR FAULT CODE - NOT USED

Next: &nff, !f1601

DISPLAY

Next: &1657, ?1607, ?1609

INFORMATION DISPLAY SETUP

Next: &269, !f1658

F20

OUTSIDE MODEL

Next: &nff, !f1745

INSPECTION FLUE COLLECTOR AND SEALS

Next: &1606, !f1748

F2 F3

HARNESS - CONTROL

Next: End

FAN SPEED CONTROL

FAN ASSEMBLY

Next: End

F3 NO VOLTAGE ON DEMAND

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

HALL SENSOR

FAN ASSEMBLY

Next: End

BLOWING FUSE

GAS VALVE ASSEMBLY

Next: End

BLOWN FUSE

IGNITOR - ZIG

Next: End

FUSE F1 IRIS

GAS VALVE ASSEMBLY

Next: End

FUSE F1 IRIS

IGNITOR - ZIG

Next: End

FUSE F1 IRIS

TRANSFORMER - WIJDEVEN

Next: End

BLOWING FUSES

SYSTEM PUMP FAULT

Next: End

IRISBLOWING FUSES

SYSTEM PUMP FAULT

Next: End

F14 FAULT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULT 4F14

SYSTEM PUMP FAULT

Next: End

FAULTY 1

MOD CARD

Next: End

FAN CONTROL 29999

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

CALIBRATION 19999

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 19999

THERMISTOR - HEATING FLOW / RETURN

Next: End

OC 19999

THERMOSTAT - OVERHEAT

Next: End

FAN CONTROL 2

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

CALIBRATION 1

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 1

THERMISTOR - HEATING FLOW / RETURN

Next: End

OC 1

THERMOSTAT - OVERHEAT

Next: End

PREHEAT FAN FUNCTION

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

BLOWN

FUSE F2

Next: End

BLOCKED 2

SIPHON

Next: End

FLAME SENSE

LEAD - IGNITION

Next: End

ELECTRODE RECTIFICATION

ELECTRODE - SPARK

Next: End

PUMP FUNCTION 1

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULT 3

SYSTEM PUMP FAULT

Next: End

FAULT 1

Next: End

ALWAYS ON

Next: End

FAULT CODE F11/12

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

OVERHEAT

Next: End

OVERHEAT 2

THERMISTOR - HEATING FLOW / RETURN

Next: End

OVERHEAT

THERMISTOR - HEATING FLOW / RETURN

Next: End

F13

WIRING HARNESSES

Next: End

FAULT CODE 11 F13

HARNESS - INTERFACE

Next: End

FAULT CODE F11/12 F13

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F12 IRIS SYMS PCB

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F12 IRIS SYMS PCB F13

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F18

BOARD - DISPLAY

Next: End

FLASHING DISPLAY (SYMS)

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FLASHING DISPLAY IRIS PCB

HARNESS - INTERFACE

Next: End

PUMP FUNCTION 2

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FATIGUE SYSMI

FUSE (FUSED SPUR)

Next: End

BLOWN

FUSE F1

Next: End

NO DISPLAY

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

DISPLAY PCB VOLTAGE

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULT 4

SYSTEM PUMP FAULT

Next: End

NO DISPLAY

HARNESS - INTERFACE

Next: End

FATIGUE IRIS

FUSE (FUSED SPUR)

Next: End

BLOWN

FUSE F1

Next: End

FAULT 2

HARNESS - INTERFACE

Next: End

INFORMATION DISPLAY SETUP

Z BLANK

Next: End

BYPASS EXTERNAL

Next: End

F8

PARAMETER SETTING

Next: End

FAN RUNSFAN SPEED CONTROL

FAN ASSEMBLY

Next: End

FAN RUNS CONTINUALLY

HARNESS - CONTROL

Next: End

FAN RUNS9999

HARNESS - CONTROL

Next: End

FAN RUNS

HARNESS - CONTROL

Next: End

NO SPARKING

HARNESS - CONTROL

Next: End

F20

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

INSPECTION FLUE COLLECTOR AND SEALS

FLUE COLLECTOR / SEALS

Next: End

CALIBRATION 2

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 2

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 4

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 4

THERMISTOR - HEATING FLOW / RETURN

Next: End

OC 2

THERMOSTAT - OVERHEAT

Next: End

FAULT 3

FLUE

Next: End

FAULT 3

SIPHON

Next: End

CALIBRATION 3

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 3

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 5

THERMISTOR - HEATING FLOW / RETURN

Next: End

CALIBRATION 5

THERMISTOR - HEATING FLOW / RETURN

Next: End

OC 3

THERMOSTAT - OVERHEAT

Next: End

FAULT 4

FLUE

Next: End

FAULT 4

SIPHON

Next: End

OVERHEATLIMIT TEMP

Next: End

CH OPERATION 2F14

THERMISTOR - HEATING FLOW / RETURN

Next: End

CH CALIBRATIONF14

THERMISTOR - HEATING FLOW / RETURN

Next: End

F14OVERHEATLIMIT TEMP

Next: End

FLUEWAYS SHUTTING OFF

HEAT EXCHANGER

Next: End

FAULTY

FLUE

Next: End

NOT ESTABLISHING

GAS VALVE SETTINGS

Next: End

RECTIFICATION

IGNITOR - ZIG

Next: End

COMBUSTION

SIPHON

Next: End

BLOCKED999RATIO

FLUE

Next: End

COMBUSTION

BURNER

Next: End

FLUEWAYS

HEAT EXCHANGER

Next: End

BLOCKED

SIPHON

Next: End

BLOCKED

FLUE

Next: End

GAP

ELECTRODE - SPARK

Next: End

BURNER IGNITES - DOES NOT IGNITE - LOW PRESSURE

HEAT EXCHANGER

Next: End

PART BLOCKED OR DAMAGED

BURNER

Next: End

NO VOLTAGE TO GAS VALVE

PCB + GAS VALVE

Next: End

ELECTRICAL SAFETY CHECKS

Next: End

DIRECTIONAL

Z DIRECTION

Next: End

FAULT CODES

Z DIRECTION

Next: End

F19FAULT F6

THERMISTOR - HEATING FLOW / RETURN

Next: End

F10F19

THERMISTOR - HEATING FLOW / RETURN

Next: End

FAULT F16

GAS VALVE ASSEMBLY

Next: End

FAULT F6

THERMISTOR - HEATING FLOW / RETURN

Next: End

F10

THERMISTOR - HEATING FLOW / RETURN

Next: End

FAULT CODE 11

HARNESS - INTERFACE

Next: End

F5 FAULTF5 FAULT

THERMOSTAT - OVERHEAT

Next: End

F5 FAULT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F5 FAULT CODE

SYSTEM PUMP FAULT

Next: End

F5 FAULTF25

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F5 FAULT CODELIMIT TEMP

SYSTEM PUMP FAULT

Next: End

OVERHEATLIMIT TEMP

THERMISTOR - HEATING FLOW / RETURN

Next: End

1F5/F9LIMIT TEMP

THERMISTOR - HEATING FLOW / RETURN

Next: End

OC 4

THERMOSTAT - OVERHEAT

Next: End

CASE OFF

Z DIRECTION

Next: End

FAULTY 2

Next: End

BLANK FOR UNIVERSAL DISPLAY SET UP

Z BLANK

Next: End

F17

Next: End

F17 IRIS

Next: End

FUSE F1 IRIS

BOARD 230V - OPTION

Next: End

FUSE

BOARD 230V - OPTION

Next: End

DAMAGE

ELECTRODE - SPARK

Next: End

F1 LOCKOUT

WIRING HARNESSES

Next: End

OVERHEAT

THERMISTOR - HEATING FLOW / RETURN

Next: End

1F5/F9

THERMISTOR - HEATING FLOW / RETURN

Next: End

1F5 FAULT

THERMOSTAT - OVERHEAT

Next: End

PUMP OVERRUN

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

POOR NOT ESTABLISH

GAS SUPPLY

Next: End

CYCLING NO DEMAND

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAN SPEED CONTROL

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F2 F3 FAULT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

SYMS FUSE

HARNESS - CONTROL

Next: End

NO FAULT

FUSE INVESTIGATION SYMS PCB

Next: End

SPARK GENERATOR

HARNESS - IGNITION

Next: End

IRIS FUSE

HARNESS - CONTROL

Next: End

SPARK GEN IRIS

HARNESS - IGNITION

Next: End

NO FAULT

FUSE INVESTIGATION IRIS PCB

Next: End

PUMP

HARNESS - PUMP

Next: End

IRISPUMP

HARNESS - PUMP

Next: End

F14 FAULT

SYSTEM PUMP FAULT

Next: End

FAN RUN PREHEAT

TRANSFORMER - WIJDEVEN

Next: End

PREHEAT FAN RUN

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

PREHEAT DEMAND

FAN ASSEMBLY

Next: End

FAN RUN PREHEAT 2

TRANSFORMER - WIJDEVEN

Next: End

FAULT 1

SYSTEM PUMP FAULT

Next: End

FAULT 1

Next: End

PERMANENT DEMAND 240

BOARD 230V - OPTION

Next: End

NO FAN OPERATION

FAN ASSEMBLY

Next: End

NO FAN OPERATION 2

FAN ASSEMBLY

Next: End

NO FAN OPERATION 3

FAN ASSEMBLY

Next: End

NO FAN OPERATION 4

FAN ASSEMBLY

Next: End

OVERHEAT

Next: End

FAN SPEED

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULT CODE F3

FAN ASSEMBLY

Next: End

FAULT CODE F3 2

FAN ASSEMBLY

Next: End

FAULT F5F5 FAULT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

OVERHEAT 3

HARNESS - CONTROL

Next: End

OVERHEAT 4

HARNESS - CONTROL

Next: End

F13 RESET

Z DIRECTION

Next: End

F8 / F12 IRIS

PCB - MAIN - CONNECTION FAULT (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F8 / F12 SYMS

PCB - MAIN - CONNECTION FAULT (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F11 / F13 IRIS

PCB - MAIN - CONNECTION FAULT (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F11 / F13 SYMS

PCB - MAIN - CONNECTION FAULT (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULT 2

SYSTEM PUMP FAULT

Next: End

JUMBLED DISPLAY - SYMS

PCB - MAIN - CONNECTION FAULT (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

JUMBLED DISPLAY - IRIS

PCB - MAIN - CONNECTION FAULT (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULTY

HARNESS - MAINS INLET

Next: End

NO VOLTAGE IRISIRIS PCB

Next: End

FUSE FURTHER INVESTIGATIONIRIS PCB

Z BLANK

Next: End

FUSE INVESTIGATION 1AFUSE IRIS

Z BLANK

Next: End

NO DISPLAY B2

FAN ASSEMBLY

Next: End

FAULTY

BOARD - DISPLAY

Next: End

FAULTY9999

HARNESS - MAINS INLET

Next: End

SYMS PCB

Next: End

FUSE FURTHER INVESTIGATION

Z BLANK

Next: End

FAULT 2

Next: End

FUSE INVESTIGATION 1A

Z BLANK

Next: End

NO DISPLAY IRIS PCB

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

NO DEMAND TO FAN

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

NO DEMAND TO FAN 3

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

OVERHEAT NOT SHUTTING OFF

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAN RUNSFAN SPEED CONTROL

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

NO SPARKING F2 F3 FAULT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

NO SPARKING HALL SENSOR

FAN ASSEMBLY

Next: End

DHW CALIBRATION

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

DHW BOILER SHUTS DOWN PREMATURELY

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

CH INSUFF HEAT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

CH BOILER SHUTS DOWN PREMATURELY

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

AIRRESCRICTIONS

BOILER NOW WORKING

Next: End

TEMP FAULT CODE NOT SHUTTING OFF

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

OVERHEAT2OVERHEATLIMIT TEMP

HEAT EXCHANGER

Next: End

OVERHEATLIMIT TEMP

Next: End

F14AIRRESCRICTIONS

BOILER NOW WORKING

Next: End

F14TEMP FAULT CODE NOT SHUTTING OFF

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F14OVERHEAT2OVERHEATLIMIT TEMP

HEAT EXCHANGER

Next: End

F14OVERHEATLIMIT TEMP

Next: End

FLAME SENSE FUNCTION

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

COMBUSTION

GAS VALVE SETTINGS

Next: End

NOT PASSING

GAS VALVE ASSEMBLY

Next: End

POOR 3

GAS SUPPLY

Next: End

NOT PASSING 999

GAS VALVE ASSEMBLY

Next: End

GASVALVE FUNCTION

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

DHW DEMAND FAULT 1

Next: End

F19F6 FAULT CODE

HARNESS - CONTROL

Next: End

FAULT F6F10 FAULTF19

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F6 FAULT CODEF10 FAULTF19

HARNESS - CONTROL

Next: End

FAULT F16

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULT F6

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F6 FAULT CODE

HARNESS - CONTROL

Next: End

FAULT F6F10 FAULT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F6 FAULT CODEF10 FAULT

HARNESS - CONTROL

Next: End

F5 FAULT

SYSTEM PUMP FAULT

Next: End

F5 FAULTF25

SYSTEM PUMP FAULT

Next: End

OVERHEATLIMIT TEMP

HARNESS - CONTROL

Next: End

OVERHEAT2LIMIT TEMP

HARNESS - CONTROL

Next: End

FAN FUNCTION 1

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

NO VOLTAGE TO CONTROL PCB

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

NO CH DEMAND

BOARD 230V - OPTION

Next: End

F17

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

F17 IRIS

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

FAULT

IGNITOR - ZIG

Next: End

DAMAGE

LEAD - IGNITION

Next: End

F1 LOCKOUT

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

OVERHEAT

HARNESS - CONTROL

Next: End

OVERHEAT2

HARNESS - CONTROL

Next: End

OVERHEAT

TEMPERATURE OVERHEAT

Next: End

OVERHEAT2OVERHEAT

HEAT EXCHANGER

Next: End

1FAULT F5

PCB - MAIN (SAME PART AS BG330 - GLOWWORM XI MODELS)

Next: End

Boiler shuts down prematurely

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1754

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION DOES FAN RUN BEFORE FAULT

Next: p1015

FAN RUNS ON HIGH SPEED WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION DOES FAN RUN BEFORE FAULT

Next: p1017

SYMS17 0 AS STANDARD NO CONTROLLER OR CARD

CHARACTERISTIC TEST FROM TYPE OF FAN CONTROL

Next: p1716

SYMS17 0 AS MOD WITH CARD

CHARACTERISTIC TEST FROM TYPE OF FAN CONTROL

Next: p1202

Boiler temperature low, system temperature low

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1765

Boiler to temperature, radiators cool

CHARACTERISTIC TEST FROM CH OPERATION

Next: p144

VOLTAGE BEHAVES AS DESCRIBED

CHARACTERISTIC TEST FROM VOLTAGE FAN CONTROL (FAULT CODE F3)

Next: !p1435

VOLTAGE ABSENT (LESS THAN 1 VDC, E G 0 VDC)

CHARACTERISTIC TEST FROM VOLTAGE FAN CONTROL

Next: !p1438

VOLTAGE BEHAVES AS DESCRIBED

CHARACTERISTIC TEST FROM VOLTAGE FAN CONTROL (FAULT CODE F3)

Next: !p1441

VOLTAGE ABSENT (LESS THAN 1 VDC, E G 0 VDC)

CHARACTERISTIC TEST FROM VOLTAGE FAN CONTROL

Next: !p1443

Boiler shuts down prematurely

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1770

VOLTAGE BEHAVES AS DESCRIBED

CHARACTERISTIC TEST FROM VOLTAGE FAN CONTROL (FAULT CODE F3)

Next: !p1496

VOLTAGE ABSENT ( LESS THAN 1 VDC, E G 0 VDC)

CHARACTERISTIC TEST FROM VOLTAGE FAN CONTROL (FAULT CODE F3)

Next: !p1498

DISPLAY DOES NOT OPERATE

CHARACTERISTIC TEST FROM DISPLAY

Next: p1608

DISPLAY OPERATES BUT FLASHES OR DOES NOT SHOW CORRECT INFORMATION

CHARACTERISTIC TEST FROM DISPLAY

Next: p1610

FAN RUNS IMMEDIATELY AND CONTINUALLY AT HIGH SPEED

CHARACTERISTIC TEST FROM FAN RUNS

Next: p1690

BOILER TEMP RISES RAPIDLY

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: p1784

BOILER TEMP GOES ABOVE 87 DEGREES AND DOESNT CUT OFF

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: !p1786

DIFFERENTIAL NOT OK

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: !p1788

BOILER TEMP RISES RAPIDLY

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: p1799

BOILER TEMP GOES ABOVE 87 DEGREES AND DOESNT CUT OFF

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: !p1801

DIFFERENTIAL NOT OK

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: !p1803

INLET PRESSURE DOES NOT DIP TO INDICATE GAS VALVE IS OPENING

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DIP

Next: p1852

INLET PRESSURE UNSATISFACTORY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DIP

Next: !p1851

Fan runs for approximately 4 seconds then stops

CHARACTERISTIC TEST FROM FAN RUNS

Next: p514

Fan does not run

CHARACTERISTIC TEST FROM FAN RUNS

Next: p559

20V OR GREATER MEASURED ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE CONTROLS PCB DEMAND

Next: p563

LESS THAN 2V MEASURED ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE CONTROLS PCB DEMAND

Next: !p565

SPARKING PRESENT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p1836

Sparking absent

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p861

BOILER GOES TO F1 FAULT CODE WITHOUT 3 ATTEMPTS TO IGNITE

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p863

Appliance does not react to DHW demand

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p194

Boiler to temperature, DHW cool

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p97

BOILER TEMP RISES RAPIDLY

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: !p1492

BOILER TEMP GOES ABOVE 87 DEGREES AND DOESNT CUT OFF

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: !p1678

BOILER LOCKS OUT ON OVERHEAT BEFORE REACHING 87 DEGREES

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: p966

DIFFERENTIAL NOT OK

CHARACTERISTIC TEST FROM CH TEST TEMPERATURE

Next: !p968

Boiler temperature low, DHW temperature low

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1749

08/06/2021 15:40:06 2106_1_50_1 14/07/2021 11:19:26

05/07/2021 08:56:11

Next: End

VOLTAGE CONTROL PCB NO DEMAND

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED

Next: !p1001, f1430

FAN LOOM CONTINUITY

REMOVE THE FAN LOOM FROM THE PCB (J4) AND THE FAN

Next: p1010, !f1011

RESISTANCE GAS VALVE

DISCONNECT LEADS FROM THE GAS VALVE

Next: !p1038, !f1039

RESISTANCE SPARK GENERATOR

REMOVE ELECTRICAL CONNECTORS FROM SPARK GENERATOR

Next: !p1042, !f1043

RESISTANCE GAS VALVE

DISCONNECT LEADS FROM THE GAS VALVE

Next: !p1047, !f1048

RESISTANCE SPARK GENERATOR

REMOVE ELECTRICAL CONNECTORS FROM SPARK GENERATOR

Next: !p1051, !f1052

RESISTANCE PUMP

THE PUMP IS NOT AN I

Next: !p1156, !f1157

RESISTANCE PUMP

THE PUMP IS NOT AN I

Next: !p1160, !f1161

DOES PUMP RUN

Next: p1166, f1163

PUMP VOLTAGE (CH)

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)
MAINS RESET SWITCH ON

Next: !p1164, !f1165

FAN DC SU (INPUT VOLTAGE)

REMOVE REAR COVER OF CONTROL PANEL TO EXPOSE MAIN PCB

Next: !p1243, !f1244

FAN VOLTAGE J4 DISCONNECTED

{MAINSRSSWOFF}
DISCONNECT J4 CONNECTOR AT PCB AND MAKE SAFE

Next: !p1247, f1248

FUSE RESISTANCE (DCSU)

REMOVE FUSE F2 FROM ITS HOLDER IN THE FAN DC SUPPLY CONTROL UNIT

Next: !p1249, !f1250

PUMP VOLTAGE (DHW)

ENSURE THERE IS A DE

Next: !p132, !f133

EXTERNAL CONTROLS VOLTAGE (OUTPUT) NO DEMAND

{MAINSRSSWOFF}
RE

Next: !p1431, !f1432

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: !p1504, !f1505

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: !p1506, !f1507

INSPECTION PCB AND CONNECTIONS

Next: p1534, !f1532

RESISTANCE HARNESS USER INTERFACE

REMOVE THE HARNESS FROM THE MAIN PCB TO THE USER CONTROL PCB

Next: p1541, !f1542

MAIN PCB TO DISPLAY PCB VOLTS

{MAINSRSSWOFF}
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: !p1576, !f1577

MAIN PCB TO DISPLAY PCB VOLTS

{MAINSRSSWOFF}
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: !p1583, !f1584

PUMP VOLTAGE (CH)

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)
MAINS RESET SWITCH ON

Next: !p161, !f162

MAIN PCB TO DISPLAY PCB VOLTS

{MAINSRSSWOFF}
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: !p1613, !f1614

VOLTAGE TO MAIN PCB SYMS

Next: p1621, f1622

MAINS RESET SWITCH VOLTAGE

GAIN ACCESS TO PCB (

Next: !p1623, f1624

RESISTANCE MAINS FUSE (3AMP)

REMOVE FUSE FROM FUSED SPUR

Next: !p1625, f1626

FUSE FURTHER INVESTIGATION MAINS 3A SYMS

Next: !p1627, !f1628

FUSE FURTHER INVESTIGATION 1A SYMS

Next: !p1631, !f1632

INSPECTION PCB CAPACITORS

{MAINSRSSWOFF}

Next: !p1635, !f1636

MAINS RESET SWITCH VOLTAGE

GAIN ACCESS TO PCB (

Next: !p1643, f1644

RESISTANCE MAINS FUSE (3AMP)

REMOVE FUSE FROM FUSED SPUR

Next: !p1645, f1646

FUSE FURTHER INVESTIGATION MAINS 3A IRIS

Next: !p1647, !f1648

FUSE FURTHER INVESTIGATION 1A (HYPERLINK) IRIS

Next: !p1651, !f1652

VOLTAGE FAN HALL SENSOR

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED
ENSURE BOILER IS COOL

Next: !p1739, f1741

FAN LOOM CONTINUITY

REMOVE THE FAN LOOM FROM THE PCB (J4) AND THE FAN

Next: !p1746, !f1743

CONDENSATE SIPHON

Next: p1821, !f1822

RESISTANCE GAS VALVE

DISCONNECT LEADS FROM THE GAS VALVE

Next: !p1855, !f1856

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p330, f331

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: !p332, !f333

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: !p336, !f337

INSPECTION BURNER GAS SHUTDOWN

HW DEMAND

Next: !p340, !f341

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: !p344, f345

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: !p346, !f347

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: !p350, f351

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: !p352, !f353

RESISTANCE HARNESS USER INTERFACE

REMOVE THE HARNESS FROM THE MAIN PCB TO THE USER CONTROL PCB

Next: p1447, !f357

BOILER RESET

ALLOW BOILER TO COOL
RESET OVERHEAT BY PUSHING IN RED BUTTON (IF NECESSARY)

Next: p362, f363

OVERHEAT THERMOSTAT

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT

Next: p1499, !f365

PUMP VOLTAGE (CH)

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)
MAINS RESET SWITCH ON

Next: !p368, !f369

DOES PUMP RUN

Next: p406, f407

PUMP VOLTAGE (CH)

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)
MAINS RESET SWITCH ON

Next: !p408, !f409

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: !p414, !f415

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: !p418, !f419

IDENTIFY PCB

REMOVE CONTROL BOX COVER

Next: p775, f776

VOLTAGE TO MAIN PCB SYMS

Next: !p777, !f778

RESISTANCE CONTROLS INTERFACE IRIS

REMOVE REAR CONTROL

Next: p783, !f784

RESISTANCE CONTROLS INTERFACE

REMOVE REAR CONTROL

Next: p803, !f804

SPARK GENERATOR (INPUT)

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)
MAINS RESET SWITCH ON

Next: !p868, f1738

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: !p953, !f954

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: !p957, !f958

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
MAINS RESET SWITCH ON

Next: p1256, !f982

OBSERVATION DOES FAN RUN BEFORE FAULT

ENSURE BOILER IS COOL

Next: p1012, ?1014, ?1016

VOLTAGE FAN HALL SENSOR

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED
ENSURE BOILER IS COOL

Next: !p1024, !f1025

FAN VOLTAGE

{MAINSRSSWOFF}

Next: p1020, !f1021

VOLTAGE FAN SPEED CONTROL

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED

Next: !p1018, !f1019

VOLTAGE FAN CONTROL (FAULT CODE F3)

{MAINSRSSWOFF}

Next: !p1494, ?1495, ?1497

RESISTANCE GAS VALVE AND HARNESS

{MAINSRSSWOFF}
REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p1036, f1037

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE REAR CONTROL PANEL COVER TO EXPOSE MAIN PCB
REMOVE CONNECTOR H2 FROM MAIN PCB

Next: !p1040, f1041

RESISTANCE GAS VALVE AND HARNESS IRIS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p1045, f1046

RESISTANCE SPARK GENERATOR AND HARNESS IRIS

REMOVE REAR CONTROL PANEL COVER TO EXPOSE MAIN PCB
REMOVE CONNECTOR H2 FROM MAIN PCB

Next: p1049, f1050

RESISTANCE DC FAN CONTROLLER

DISCONNECT FAN DC CONTROLLER CONNECTOR MARKED H3 ON THE MAIN PCB.

Next: !p1053, !f1054

PUMP LIMPET TEST (CH)

Next: p1791, !f1168

TYPE OF FAN CONTROL

THERE ARE THREE TYPE

Next: p1198, ?1199, ?1201

FAN VOLTAGE

{MAINSRSSWOFF}

Next: p1241, f1242

FAN VOLTAGE

{MAINSRSSWOFF}

Next: p1223, !f1224

IS MOD CARD PRESENT

{MAINSRSSWOFF}

Next: p1695, !f1204

FAN VOLTAGE

{MAINSRSSWOFF}

Next: p1205, !f1206

VOLTAGE FAN CONTROL

{MAINSRSSWOFF}

Next: p1209, ?1434, ?1436

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: p1211, !f1212

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: p1213, !f1214

OVERHEAT THERMOSTAT

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT

Next: !p1664, !f1216

VOLTAGE FAN CONTROL

{MAINSRSSWOFF}

Next: p1227, ?1440, ?1442

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: p1229, !f1230

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: p1231, !f1232

OVERHEAT THERMOSTAT

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT

Next: !p1662, !f1234

FAN TEST (DISCONNECTED)

DISCONNECT CONNECTOR MARKED J4 FROM THE
MAIN PCB AND MAKE SAFE

Next: !p1245, f1246

CONDENSATE SIPHON

Next: p1257, !f1258

ELECTRODE LEAD INSPECTION

REMOVE THE ELECTRODE LEAD FROM THE BOILER

Next: p1259, !f1260

SPARK ELECTRODE

REMOVE ELECTRODE ASSEMBLY

Next: p1811, !f1262

PUMP LIMPET TEST (DHW)

Next: p134, !f135

EXTERNAL CONTROLS DHW DEMAND

Next: !p136, !f137

EXTERNAL PUMP RUNS (CH)

MAINS RESET SWITCH ON

Next: p159, f160

INSPECTION PCB CAPACITORS

{MAINSRSSWOFF}

Next: p1679, !f1451

EXTERNAL BYPASS

Next: p950, !f1489

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p1500, f1501

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: !p1502, f1503

OBSERVATION BOILER RESET F13 FAULT

ON/OFF SWITCH ON

Next: !p1551, f1540

INSPECTION PCB CAPACITORS

{MAINSRSSWOFF}

Next: p1580, !f1544

IDENTIFY PCB

REMOVE CONTROL BOX COVER

Next: !p1574, f1575

IDENTIFY PCB

REMOVE CONTROL BOX COVER

Next: !p1581, f1582

PUMP LIMPET TEST (CH)

Next: p163, !f164

IDENTIFY PCB

REMOVE CONTROL BOX COVER

Next: p1619, f1620

IDENTIFY PCB

REMOVE CONTROL BOX COVER

Next: p1611, f1612

RESISTANCE HARNESS USER INTERFACE

REMOVE THE HARNESS FROM THE MAIN PCB TO THE USER CONTROL PCB

Next: !p1615, !f1616

VOLTAGE TO MAIN PCB IRIS

Next: p1641, f1642

FUSE F1 (RES) SYMS

REMOVE FUSE F1 FROM ITS HOLDER ON THE MAIN PCB

Next: p1629, f1630

REMOVE FAN CONNECTOR SYMS

{MAINSRSSWOFF}
REMOVE J4 CONNECTOR FROM THE PCB AND PLACE IT SAFELY AWAY FROM THE BOARD

Next: p1633, f1634

EXTERNAL BYPASS

Next: !p165, !f166

MAIN PCB TO DISPLAY PCB VOLTS

{MAINSRSSWOFF}
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: p1637, !f1638

RESISTANCE HARNESS USER INTERFACE

REMOVE THE HARNESS FROM THE MAIN PCB TO THE USER CONTROL PCB

Next: !p1639, !f1640

FUSE F1 (RES) IRIS

REMOVE FUSE F1 FROM ITS HOLDER ON THE MAIN PCB

Next: p1649, f1650

RESISTANCE HARNESS USER INTERFACE

REMOVE THE HARNESS FROM THE MAIN PCB TO THE USER CONTROL PCB

Next: !p1653, !f1654

INSPECTION PARAMETER 9

Next: p1573, !f1685

VOLTAGE FAN SPEED CONTROL

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED

Next: !p1688, !f1689

FAN LOOM CONTINUITY

REMOVE THE FAN LOOM FROM THE PCB (J4) AND THE FAN

Next: p1687, !f1694

FAN LOOM CONTINUITY

REMOVE THE FAN LOOM FROM THE PCB (J4) AND THE FAN

Next: p1203, !f1713

FAN LOOM CONTINUITY

REMOVE THE FAN LOOM FROM THE PCB (J4) AND THE FAN

Next: p1200, !f1734

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: p1750, !f1751

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: !p1752, !f1753

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: p1755, !f1756

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: p1757, !f1758

OVERHEAT THERMOSTAT

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT

Next: p1759, !f1760

FLUE CHECK

Next: p1761, !f1762

CONDENSATE SIPHON

Next: !p1763, !f1764

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: p1766, !f1767

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: !p1768, !f1769

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: p1771, !f1772

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: p1773, !f1774

OVERHEAT THERMOSTAT

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT

Next: p1775, !f1776

FLUE CHECK

Next: p1777, !f1778

CONDENSATE SIPHON

Next: !p1779, !f1780

CH TEST TEMPERATURE

ATTACH FGA TEMPERATU

Next: !p1782, ?1783, ?1785, ?1787

EXTERNAL BYPASS

Next: !p1789, !f1790

FLOW THERMISTOR

REMOVE THE BLUE LEADS FROM THE FLOW THERMISTOR

Next: p1792, !f1793

RETURN THERMISTOR

DISCONNECT WHITE WIRES FROM THE THERMISTOR

Next: p1794, !f1795

CH TEST TEMPERATURE

ATTACH FGA TEMPERATU

Next: !p1796, ?1798, ?1800, ?1802

EXTERNAL BYPASS

Next: !p1804, !f1805

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN, GAS VALVE AND BURNER ASSEMBLY

Next: p1812, !f1813

FLUE CHECK

Next: p1814, !f1815

RESET GAS VALVE

RESET GAS VALVE THRO

Next: p1816, !f1817

RECTIFICATION VOLTAGE FROM SPARK GEN

Next: !p1818, !f1819

INSPECTION FLUE

Next: p1823, !f1824

BURNER

Next: p1825, !f1826

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN, GAS VALVE AND BURNER ASSEMBLY

Next: !p1827, !f1828

CONDENSATE SIPHON

Next: p1838, !f1837

INSPECTION FLUE

Next: p1840, !f1839

PRESSURE GAS INLET AND DIP

ATTACH PRESSURE GAUGE TO GAS VALVE INLET PRESSURE TEST POINT
MAINS RESET SWITCH ON

Next: p1841, ?1848, ?1850

SPARK ELECTRODE

REMOVE ELECTRODE ASSEMBLY

Next: p1842, !f1843

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN, GAS VALVE AND BURNER ASSEMBLY

Next: p1844, !f1845

BURNER

Next: !p1846, !f1847

GAS VALVE VOLTAGE

PLACE MULTIMETER PRO

Next: !p1853, f1854

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: !p334, f335

DOES PUMP RUN

Next: p366, f367

PUMP LIMPET TEST (CH)

Next: p918, !f371

PUMP LIMPET TEST (CH)

Next: p410, !f411

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p412, f413

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p1781, f417

OVERHEAT THERMOSTAT

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT

Next: !p515, !f516

VOLTAGE CONTROLS PCB DEMAND

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)
USE INSULATION MAT AS REQUIRED

Next: p1197, ?562, ?564

EXTERNAL CONTROLS VOLTAGE (OUTPUT)

{MAINSRSSWOFF}
RE

Next: !p566, !f744

VOLTAGE TO MAIN PCB IRIS

Next: !p779, !f780

RESISTANCE PUMP AND HARNESS IRIS

REMOVE REAR CONTROL

Next: p1044, f1159

RESISTANCE PUMP AND HARNESS

REMOVE REAR CONTROL

Next: p1035, f1155

SPARK GENERATOR (OUTPUT)

ENSURE THE APPLIANCE

Next: p866, f867

INSPECTION PCB AND CONNECTIONS

Next: !p916, !f917

SPARK ELECTRODE

REMOVE ELECTRODE ASSEMBLY

Next: !p870, !f871

OBSERVATION PUMP OVERRUN

Next: p1459, !f979

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p951, f952

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE THE CONNECTOR J1 FROM THE PCB

Next: p955, f956

CH TEST TEMPERATURE

ATTACH FGA TEMPERATU

Next: !p959, ?961, ?963, ?965, ?967

THERMOSTAT OVERHEAT - OVERHEAT THERMOSTAT

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT

Next: !p969, !f970

EXTERNAL PUMP RUNS (DHW)

MAINS RESET SWITCH ON

Next: p130, f131

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