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:

IDEAL LOGIC + HEAT H

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

INFORMATION CASE REMOVAL

Next: &3, !f2

OBSERVATION DISPLAY AND SELF CHECK

{ALLDEMANDOFF}
SELECTOR SWITCH IN ON POSITION

Next: &71, ?4, ?6, ?8, ?12, ?1789

TYPE OF DIAGNOSTIC PROCEDURE

Next: &73, !f72

OBSERVATION FAN RUNS

CH TEMPERATURE CONTROL SET TO MAX
ENSURE BOILER IS COOL
SELECTOR SWITCH SET TO OFF

Next: &129, ?76, ?78

OBSERVATION BURNER IGNITES AND ESTABLISHES

ENSURE BOILER IS COOL

Next: &232, ?132, ?134, ?136

OPERATION CH

THERMOSTAT SET TO MAX

Next: &1876, ?233, ?394, ?410, ?1955

OBSERVATION FAN OVERRUN

Next: &nff, !f710

OBSERVATION BOILER MODULATION

ATTACH TEMPERATURE CLAMP TO FLOW PIPE ON LEFT HAND SIDE OF BOILER

Next: &709, f762

L1

INTENTIONALLY BLANK - HEADER FOR L1 FAULT CODE

Next: &nff, f808

L2 / F2/ FN / LN - DUMMY GO TO BURNER IGNITES PAGE

OUTSIDE MODEL

Next: &nff, !f934

LC

OUTSIDE MODEL

Next: &nff, f936

L6

INTENTIONALLY BLANK - HEADER FOR FAULT CODE L6

Next: &nff, f940

FURTHER INVESTIGATION FUSE BLOWN (INTERNAL)

OUTSIDE MODEL

Next: &nff, f1716

F3

OUTSIDE MODEL

Next: &nff, f1015

F4 / L4

Next: &nff, f1030

F5 / L5

OUTSIDE MODEL

Next: &nff, f1036

F7

INTENTIONALLY BLANK - HEADER FOR F7 FAULT CODE

Next: &nff, f1042

F9 / L9 / F8 / L8

OUTSIDE MODEL

Next: &nff, f1046

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW SHOW

Next: &nff, !f1050

HEADER FOR QUICK ACCESS DATA FLOW THERMISTOR

OUTSIDE MODEL

Next: &nff, f1052

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE

OUTSIDE MODEL

Next: &nff, f1056

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE

OUTSIDE MODEL

Next: &nff, f1060

HEADER FOR QUICK ACCESS DATA FAN VOLTAGE (LOW VOLTAGE)

OUTSIDE MODEL

Next: &nff, f1066

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

OUTSIDE MODEL

Next: &nff, f1074

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR RESISTANCE

OUTSIDE MODEL

Next: &nff, f1086

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR VOLTAGE

OUTSIDE MODEL

Next: &nff, f1090

DIAGNOSTICS LITE

DIAGNOSIS RELIES ON

Next: &nff, !f1094

HEADER FOR QUICK ACCESS DATA RETURN THERMISTOR

OUTSIDE MODEL

Next: &nff, f1096

HEADER FOR QUICK ACCESS DATA FAN VOLTAGE (MAINS)

OUTSIDE MODEL

Next: &nff, f1102

F6

OUTSIDE MODEL

Next: &nff, f1161

HEADER FOR PCB COMPONENT ON STARTUP

OUTSIDE MODEL

Next: &nff, !f1191

INFORMATION OUTDOOR SENSOR AFTER AFQ INSTRUCTIONS

Next: &nff, f1933

FD

OUTSIDE MODEL

Next: &nff, f1264

FA

OUTSIDE MODEL

Next: &nff, f1261

HEADER FOR QUICK ACCESS DATA FLOW SWITCH VOLTAGE

OUTSIDE MODEL

Next: &nff, f1325

HEADER FOR SYSTEM RESTRICTION HYPERLINK

OUTSIDE MODEL

Next: &nff, !f1556

FU / FJ - FJ SKIPS FIRST TEST

Next: &nff, f1613

L7

OUTSIDE MODEL

Next: &nff, f1707

FURTHER INVESTIGATION FUSE BLOWN (MAINS)

OUTSIDE MODEL

Next: &nff, f1730

INFORMATION LOW FLOW RATE

Next: &nff, !f1833

OPERATION DHW

THERMOSTAT SET TO MAX

Next: &1893, ?1877, ?1879

COMBUSTION TEST MAX AND MINIMUM

Next: &711, ?1894, ?1896, ?1898

HEADER FOR QUICK ACCESS DATA OUTDOOR SENSOR

OUTSIDE MODEL

Next: &nff, f1930

INFORMATION SETTING BOILER TO MAXIMUM OR MINIMUM OUTPUT

Next: &nff, !f1939

RESISTANCE OUTDOOR SENSOR

GAIN ACCESS TO PCB
DISCONNECT PLUG X8 FROM THE PCB

Next: &nff, !f1941

F2 NO CONTROL VOLTAGE

PCB

Next: End

F3 FAN CONTROL

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

CODE F4

THERMISTOR - CONTROL (FLOW)

Next: End

CODE F5

THERMISTOR - CONTROL (RETURN)

Next: End

CODE F7

Next: End

F9

Z DIRECTION

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION

Next: End

OUT OF RANGE (QADAI)

THERMISTOR - CONTROL (FLOW)

Next: End

NO POWER TO GAS VALVE (QADAI)

PCB

Next: End

RESISTANCE WRONG (QADAI)

GAS VALVE KIT

Next: End

NO FAN AT START UP (QADAI)

PCB

Next: End

RESISTANCE INCORRECT (QADAI)

KIT - FAN

Next: End

RESISTANCE WRONG QADAI

UNIT - IGNITOR

Next: End

NO VOLTAGE TO SPARK GENERATOR (QADAI)

PCB

Next: End

BLANK FOR DIAGNOSICS LITE

Z DIRECTION

Next: End

OUT OF RANGE (QADAI)

THERMISTOR - CONTROL (RETURN)

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

THERMISTOR - CONTROL (FLOW)

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

THERMISTOR - CONTROL (RETURN)

Next: End

OPERATION CH - BOILER COOL RADS COOL

INJECTOR

Next: End

OPERATION CH - BOILER COOL RADS COOL

GAS INLET PRESSURE

Next: End

STUCK ON STARTUP

PCB

Next: End

F3 - FAN HARNESS

HARNESS MAINS VOLTAGE

Next: End

F3 - NEUTRAL FAULT

HARNESS MAINS VOLTAGE

Next: End

FAN NEUTRAL FAULT (QADAI)

HARNESS MAINS VOLTAGE

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO FAN

HARNESS MAINS VOLTAGE

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO FAN - NEUTRAL FAULT

HARNESS MAINS VOLTAGE

Next: End

BURNER DOES NOT ESTABLISH L6

HARNESS - DETECTION LEAD

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - TO GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

FD

SYSTEM PRESSURE

Next: End

FD RUNNING SLOW

PUMP

Next: End

F6 -REMEDIAL KIT

OUTDOOR SENSOR

Next: End

F6 FAN RUNS DHW DEMAND - NO FAN

PCB

Next: End

INCORRECT VOLTAGE (QADAI)

KIT - SENSOR - FLOW

Next: End

FAN RUNS DHW

THERMISTOR - CONTROL (FLOW)

Next: End

FAN RUNS DHW

THERMISTOR - CONTROL (RETURN)

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUNFD

SYSTEM PRESSURE

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUNFD RUNNING SLOW

PUMP

Next: End

FAULT CODE L3

SYSTEM PRESSURE

Next: End

OPERATION CH

SYSTEM PRESSURE

Next: End

L1

Next: End

L1 - OUT OF CALIB

THERMISTOR - CONTROL (FLOW)

Next: End

L1 - OUT OF CALIB

THERMISTOR - CONTROL (RETURN)

Next: End

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

KIT - SIPHON TRAP

Next: End

L1 RUNNING SLOW

PUMP

Next: End

L1

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

BURNER DOES NOT IGNITE - BAFFLES

GAS INLET PRESSURE

Next: End

OPERATION CH UP TO TEMP RADS COOL

Next: End

FA

THERMISTOR - CONTROL (FLOW)

Next: End

FA

FLOW RETURN REVERSED

Next: End

FA

SYSTEM PRESSURE

Next: End

FA L1

Next: End

BURNER BAFFLES OR NOISY

INJECTOR

Next: End

NEW MODELBLOCKED OR DAMAGED

FLUE

Next: End

FA RUNNING SLOW

PUMP

Next: End

MECHANICAL PHYSICAL OPERATION

KIT - FAN

Next: End

FA

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FA

THERMISTOR - CONTROL (RETURN)

Next: End

FAULT CODES 3

Z DIRECTION

Next: End

FA - STUCK IN FAUKLT

PCB

Next: End

NEW MODEL FLUEWAYS

KIT - HEAT ENGINE

Next: End

HYPERLINK

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

IGNITES BUT BAFFLES OR NOISY

KIT - BURNER

Next: End

FD - INTERMITTENT

SYSTEM PRESSURE

Next: End

FD - INTERMITTENT

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FD - INTERMITTENT

Next: End

FD - INTERMITTENT

PUMP

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

F9

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

BLOWN STAND BY MODE AT POWER UP

FUSE - MAINS

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY - FROM BLOCK TO PCB

HARNESS MAINS VOLTAGE

Next: End

BLOWN STANDBY MODE AT POWER UP

FUSE- PCB

Next: End

PCB DAMAGED

PCB + LEAK OR SHORT

Next: End

FU - SHOWING FAULT

THERMISTOR - CONTROL (RETURN)

Next: End

FU - SHOWING FAULT

THERMISTOR - CONTROL (FLOW)

Next: End

FU - BOILER RESET

THERMISTOR - CONTROL (FLOW)

Next: End

FU - BOILER RESET

THERMISTOR - CONTROL (RETURN)

Next: End

BURNERIGNITES

HARNESS - DETECTION LEAD

Next: End

FUFO-L3 - NO FLOW FAULT - STICKING

PUMP

Next: End

OBSERVATION PUMP AND FAN RUNS

PUMP (NOT RUNNING)

Next: End

FAN RUNS DHW DEMAND - NO FAN

PCB

Next: End

OBSERVATION PUMP & FAN RUNS - FAN DOES NOT RUN REMEDIAL KIT

OUTDOOR SENSOR

Next: End

OPERATION CH - REMAINS LIT BUT RADS ONLY WARM - NO FAN

PCB

Next: End

OPERATION CH - REMAINS LIT BUT RADS ONLY WARM - REMEDIAL KIT

OUTDOOR SENSOR

Next: End

OPERATION CH - REMAINS LIT BUT RADS ONLY WARM - LPG - REMEDIAL KIT

OUTDOOR SENSOR

Next: End

OPERATION CH - BOILER COOL RADS COOL - LPG

INJECTOR

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - SIPHON TRAP

Next: End

MECHANICAL OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - FAN

Next: End

POOR GAS RATE LPG

KIT - BURNER

Next: End

RESTRICTED OPERATION DHW DHW DOOL RADS COLD NO CH DEMAND LPG

KIT - HEAT ENGINE

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

FLUE

Next: End

FA

PUMP (NOT RUNNING)

Next: End

FD

PUMP (NOT RUNNING)

Next: End

L1

PUMP (NOT RUNNING)

Next: End

FU

Next: End

FU / FJ

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

L7

THERMISTOR FITMENT

Next: End

L7

THERMISTOR - CONTROL (FLOW)

Next: End

L7

THERMISTOR - CONTROL (RETURN)

Next: End

FAN FURTHER INVESTIGATION FUSE

KIT - FAN

Next: End

GAS VALVE FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE

UNIT - IGNITOR

Next: End

FURTHER INVESTIGATION FUSE

PUMP

Next: End

FAN FURTHER INVESTIGATION FUSE MAINS FUSE

KIT - FAN

Next: End

GAS VALVE FURTHER INVESTIGATION FUSE MAINS FUSE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE MAINS FUSE

UNIT - IGNITOR

Next: End

FUSE INVESTIGATION

NO FAULT - FUSE INVESTIGATION (MAINS)

Next: End

FU

SYSTEM PRESSURE

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

HARNESS MAINS VOLTAGE

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

LEAD - IGNITION

Next: End

FAN RUNS DHW DEMAND

KNOB POTENTIOMETER - WHITE/BLACK

Next: End

NOT RESPONDING TO HEATING

SL1 LINK

Next: End

NOT RESPONDING TO HEATING OPENTHERM

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

NOT RESPONDING TO HEATING - OPENTHERM

HARNESS MAINS VOLTAGE

Next: End

FAN RUNS CH DEMAND 1

Next: End

NOT RESPONDING TO HEATING

OPENTHERM LINK

Next: End

BURNER DOES NOT IGNITE

KIT - SIPHON TRAP

Next: End

NOT RESPONDING TO HEATING 3

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

FU

PUMP (NOT RUNNING)

Next: End

L7

PCB

Next: End

SPARK BUT NOT LIGHTING

FLUE

Next: End

SPARK BUT NOT LIGHTING

ELECTRODE - IGNITION

Next: End

NEW MODELBLOCKED OR DAMAGED

KIT - BURNER

Next: End

SPARKING BUT NO LIGHTING

KIT - HEAT ENGINE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

FLUE

Next: End

BURNER IGNITES

ELECTRODE - DETECTION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

KIT - BURNER

Next: End

INFORMATION LOW FLOW RATE

Z DIRECTION

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUN - NO VOLTAGE TO FLOW SWITCH

PCB

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUN - FLOW SENSOR

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

FD - NO VOLTAGE TO FLOW SWITCH

PCB

Next: End

FD - FLOW SENSOR

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

SHORTED NO DISPLAY

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

FIRING NO DEMAND

THERMISTOR - CONTROL (RETURN)

Next: End

NOT RESPONDING TO HEATING 2

PCB

Next: End

OBSERVATION PUMP FAN RUNS - NOT RESPONDING

OUTDOOR SENSOR

Next: End

NOT RESPONDING TO HEATING 2 OPENTHERM

PCB

Next: End

OBSERVATION PUMP FAN RUNS - NOT RESPONDING OPENTHERM

OUTDOOR SENSOR

Next: End

DHW OPERATION

Next: End

OPERATION DHW NO DEMAND

CYLINDER THERMOSTAT

Next: End

OPERATION DHW NO DEMAND

TIMER

Next: End

VOLTAGE TO GAS VALVE

PCB

Next: End

DHW OPERATION

Next: End

LOW WHEN RUNNING ON MAX RATE

GAS INLET PRESSURE

Next: End

RECTIFICATION ELECTRODE NOT ESTABLISHING DROPPING OUT AT MINIMUM

ELECTRODE - DETECTION

Next: End

LOW CAUSING COMBUSTION ISSUES

GAS INLET PRESSURE

Next: End

RESTRICTED AFFECTING FGA

KIT - SIPHON TRAP

Next: End

RESTRICTED AFFECTING FGA

INJECTOR

Next: End

COMBUSTION TEST FAILED

KIT - FAN

Next: End

CAUSING POOR COMBUSTION FGA

KIT - BURNER

Next: End

RESTRICTED CAUSING FGA FAIL

KIT - HEAT ENGINE

Next: End

QADAI

OUTDOOR SENSOR (RESISTANCE)

Next: End

OUTDOOR REMEDIAL 2

Z DIRECTION

Next: End

OUTDOOR REMEDIAL 3

Z DIRECTION

Next: End

INFORMATION SETTING BOILER

Z DIRECTION

Next: End

OUTSIDE MODEL

OUTDOOR SENSOR

Next: End

OPERATION DHW POOR OPERATION

CYLINDER THERMOSTAT

Next: End

BURNER DOES NOT IGNITE

INJECTOR

Next: End

OPERATION DHW POOR OPERATION

TIMER

Next: End

DHW OPERATION WEATHER COMP

Next: End

OPERATION CH CUTS OUT

SYSTEM PRESSURE

Next: End

OPERATION CH CUTS OUT

PUMP

Next: End

OPERATION CH CUTS OUT

Next: End

OPERATION CH - CUTS OUT

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

HOT WATER CUTS OUT

THERMISTOR - CONTROL (FLOW)

Next: End

BURNER DOES NOT IGNITE

KIT - BURNER

Next: End

CUTS OUT

THERMISTOR - CONTROL (RETURN)

Next: End

OPERATION CH - CUTS OUT

PCB

Next: End

OPERATION CH - REMEDIAL KIT CUTS OUT

OUTDOOR SENSOR

Next: End

BURNER DOES NOT IGNITE

KIT - HEAT ENGINE

Next: End

CASE REMOVAL

Z DIRECTION

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

POWER UP - FIRING NO DEMAND

Next: End

HOT WATER TOO HOT

THERMISTOR - CONTROL (FLOW)

Next: End

HOT WATER TOO HOT

THERMISTOR - CONTROL (RETURN)

Next: End

CH BOILER TEMP LOW SYSTEM TEMP LOW

KNOB POTENTIOMETER - WHITE/BLACK

Next: End

BOILER TO TEMP RADS COOL

PUMP

Next: End

NO FAN AT START UP

PCB

Next: End

NO FAN AT START UP FAN CONTROL

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

OPERATION CH - DOES NOT REACH TEMP - LPG

GAS INLET PRESSURE

Next: End

CALIBRATION LOW BOILER TEMP LOW SYSTEM TEMP LOW LPG

THERMISTOR - CONTROL (FLOW)

Next: End

CALIBRATION LOW BOILER TEMP LOW SYSTEM TEMP LOW LPG

THERMISTOR - CONTROL (RETURN)

Next: End

FIRES WITH NO DEMAND

FROST PROTECTION (INTERNAL)

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - SIPHON TRAP

Next: End

MECHANICAL OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - FAN

Next: End

POOR GAS RATE

KIT - BURNER

Next: End

RESTRICTED OPERATION DHW DHW DOOL RADS COLD NO CH DEMAND

KIT - HEAT ENGINE

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

FLUE

Next: End

ON WITH NO DEMAND - FROST

THERMISTOR - CONTROL (FLOW)

Next: End

CALIBRATION LOW BOILER TEMP LOW SYSTEM TEMP LOW

THERMISTOR - CONTROL (FLOW)

Next: End

CALIBRATION LOW BOILER TEMP LOW SYSTEM TEMP LOW

THERMISTOR - CONTROL (RETURN)

Next: End

NO OVERRUNS

PCB

Next: End

FOR TYPE DIAG PROCEDURE

Z DIRECTION

Next: End

OBSERVATION BOILER MODULATIONFAN RUNS DHW

THERMISTOR - CONTROL (FLOW)

Next: End

OBSERVATION BOILER MODULATION

THERMISTOR - CONTROL (RETURN)

Next: End

L1 - OVERHEAT FAULT

THERMISTOR - CONTROL (FLOW)

Next: End

L1 - OVERHEAT FAULT

THERMISTOR - CONTROL (RETURN)

Next: End

L2 / F2

Z DIRECTION

Next: End

L5

PCB

Next: End

BURNER DOES NOT ESTABLISH L6

ELECTRODE - DETECTION

Next: End

CODE L6

GAS VALVE KIT

Next: End

L6 FAULT CODE

PCB

Next: End

F2 NO MAINS TO FAN

PCB

Next: End

F2 OVER 15V ON N

KIT - FAN

Next: End

F2 NO FAN AT START UP

KIT - FAN

Next: End

CODE F4

PCB

Next: End

CODE F4

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

CODE F5

PCB

Next: End

CODE F5

HARNESS VOLTAGE PELV (LOW VOLTAGE)

Next: End

F7 CODE

PCB

Next: End

FLOW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN VOLTAGE OK (LV)

RESULT AS EXPECTED

Next: End

FAN SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR RESISTANCE

RESULT AS EXPECTED

Next: End

SPARK GENERATOR VOLTAGE

RESULT AS EXPECTED

Next: End

RETURN THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN VOLTAGE OK (MAINS)

RESULT AS EXPECTED

Next: End

F2 NO MAINS TO FAN (QADAI)

PCB

Next: End

F2 OVER 15V ON N (QADAI)

KIT - FAN

Next: End

DHW TOO HOT

PCB

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

PCB

Next: End

RECTIFICATION LEAD L6

HARNESS MAINS VOLTAGE

Next: End

F6 - OUTDOOR SENSOR REMEDIAL

PCB

Next: End

FLOW SWITCH SATISFACTORY

RESULT AS EXPECTED

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUN - STUCK IN FAULT

PCB

Next: End

L1 - DOES NOT SHUT OFF

PCB

Next: End

L1 - FAULT CODE REOCCURS

PCB

Next: End

FAULT CODES 2

Z DIRECTION

Next: End

L1 - REOCCURS

KIT - REPLACEMENT - SUMP AND COVER

Next: End

L1 - REOCCURS

MANIFOLD - FLUE

Next: End

ALL CHECKS OK RETEST MODEL

NO FAULT - OVERHEAT / L1

Next: End

L1

KIT - REPLACEMENT - SUMP AND COVER

Next: End

L1

MANIFOLD - FLUE

Next: End

OPERATION CH - UP TO TEMP RADS COOLD

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FA - DOES NOT SHUT OFF

PCB

Next: End

FA - FAULT CODE REOCCURS

PCB

Next: End

FA - REOCCURS

KIT - REPLACEMENT - SUMP AND COVER

Next: End

FA L1 - REOCCURS

MANIFOLD - FLUE

Next: End

FA ALL CHECKS OK RETEST MODEL

NO FAULT - OVERHEAT / L1

Next: End

FA

KIT - REPLACEMENT - SUMP AND COVER

Next: End

FA

MANIFOLD - FLUE

Next: End

BURNER DOES NOT IGNITELEAKING POCBAFFLES

MANIFOLD - FLUE

Next: End

BURNER DOES NOT IGNITELEAKING POCBAFFLES

KIT - REPLACEMENT - SUMP AND COVER

Next: End

FD - STUCK IN FAULT

PCB

Next: End

IGNITES BUT BAFLLES OR NOISY

GAS VALVE KIT

Next: End

FD

NO FAULT - FD

Next: End

F9

PCB

Next: End

F9

GAS VALVE KIT

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION F1

Z DIRECTION

Next: End

FURTHER IN VESTIGATION F2

Z DIRECTION

Next: End

POWER OK PCB DEAD

PCB

Next: End

INTEGRAL FUSE FATIGUED

PCB

Next: End

FU

PCB

Next: End

BURNER IGNITES AND ESTABLISHES - FLAME SENSE

HARNESS MAINS VOLTAGE

Next: End

OBSERVATION PUMP & FAN RUNS - NO FAN - OUTDOOR SENSOR REMEDIAL

PCB

Next: End

OPERATION CH - REMAINS LIT BUT RADS ONLY WARM - OUTDOOR SENSOR REMEDIAL

PCB

Next: End

OPERATION CH - DOES NOT REACH TEMP - REMEDIAL KIT

Z DIRECTION

Next: End

DHW COOL RADS COOL LPG

PCB

Next: End

FU

NO FAULT - FU / FJ

Next: End

FAN FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE

GAS VALVE KIT

Next: End

FUSE INVESTIGATION

NO FAULT - FUSE INVESTIGATION (INTERNAL)

Next: End

SPARK GEN FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

FAN FURTHER INVESTIGATION FUSE MAINS FUSE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE MAINS FUSE

GAS VALVE KIT

Next: End

SPARK GEN FURTHER INVESTIGATION FUSE MAINS FUSE

HARNESS MAINS VOLTAGE

Next: End

FUSE INVESTIGATION MAINS

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

UNIT - IGNITOR

Next: End

FAN DOES NOT RUN DHW

PCB

Next: End

NOT RESPONDING TO HEATING - OPENTHERM

Next: End

OBSERVATION PUMP AND FAN RUN - STAYS ON - EXTERNAL CONTROLS

Next: End

L7

NO FAULT - L7

Next: End

BURNER DOES NOT IGNITE

GAS VALVE KIT

Next: End

FLAME SENSE BURNER IGNITES DOES NOT ESTABLISH

PCB

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUN

KIT - SENSOR - FLOW

Next: End

FD

KIT - SENSOR - FLOW

Next: End

SHORTED NO DISPLAY

KIT - SENSOR - FLOW

Next: End

POWER UP - FIRING WITH NO FROST DEMAND

PCB

Next: End

OBSERVATION PUMP FAN RUNS - NOT RESPONDING - WEATHER COMP

PCB

Next: End

OBSERVATION PUMP FAN RUNS - NOT RESPONDING - WEATHER COMP OPENTHERM

PCB

Next: End

POOR SUPPLY

GAS INLET PRESSURE

Next: End

OPERATION DHW NO DEMAND

WIRING FAULT

Next: End

DHW OPERATION 2

Next: End

WRONG MIX ON MAXIMUM

GAS VALVE KIT

Next: End

WRONG MIX ON MINIMUM

GAS VALVE KIT

Next: End

INNER SEALS BREACHED POOR FGA

FLUE

Next: End

COMBUSTION TEST FAILED RECIRCULATING

MANIFOLD - FLUE

Next: End

COMBUSTION TEST FAILEDRECIRCULATING

KIT - REPLACEMENT - SUMP AND COVER

Next: End

NOT OPENING - MECHANICAL

GAS VALVE KIT

Next: End

COMBUSTION TEST FAILED

MANIFOLD - FLUE

Next: End

COMBUSTION TEST FAILED

KIT - REPLACEMENT - SUMP AND COVER

Next: End

WRONG MIX ON MAX AND MIN

GAS VALVE KIT

Next: End

OUTDOOR SENSOR

RESULT AS EXPECTED

Next: End

OUTDOOR SENSOR REMEDIAL

Z DIRECTION

Next: End

OPERATION DHW POOR OPERATION

WIRING FAULT

Next: End

OPERATION DHW IGNORING SL2

PCB

Next: End

OPERATION CH - CUTS OUT

KIT - SENSOR - FLOW

Next: End

OPERATION CH - OUTDOOR SENSOR REMEDIAL CUTS OUT

PCB

Next: End

SPARK BUT NOT LIGHTING

GAS VALVE KIT

Next: End

BURNER DOES NOT IGNITELEAKING POC

KIT - REPLACEMENT - SUMP AND COVER

Next: End

BURNER DOES NOT IGNITELEAKING POC

MANIFOLD - FLUE

Next: End

ON WITH NO DEMAND - FROST

PCB

Next: End

NO MAINS TO FAN AT START UP

PCB

Next: End

ELECTRICAL OVER 15V ON N

KIT - FAN

Next: End

NO FAN AT START UP

KIT - FAN

Next: End

DHW COOL RADS COOL

PCB

Next: End

OBSERVATION BOILER MODULATION

PCB

Next: End

L1 - STUCK IN FAULT

PCB

Next: End

L5

Z DIRECTION

Next: End

BLANK FOR L6 FAULT CODE

Z DIRECTION

Next: End

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1018

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1020

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1105

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1107

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY AND SELF CHECK

Next: p13

BURNER DOES NOT IGNITE - IGNITION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p133

BURNER IGNITES BUT DOES NOT ESTABLISH - RECTIFICATION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p135

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY - COMBUSTION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p137

FLOW TEMPERATURE EXCEEDS 80 DEGREES BUT BOILER DOES NOT MODULATE / SHUT OFF

CHARACTERISTIC TEST FROM OBSERVATION BOILER MODULATION (OVERHEAT)

Next: !p1396

BOILER GOES TO OVERHEAT BEFORE REACHING TEMPERATURE

CHARACTERISTIC TEST FROM OBSERVATION BOILER MODULATION (OVERHEAT)

Next: p1398

SUMP UNSATISFACTORY

Next: !p1401

FLUE MANIFOLD UNSATISFACTORY

Next: !p1403

SUMP UNSATISFACTORY

Next: !p1406

FLUE MANIFOLD UNSATISFACTORY

Next: !p1408

FLOW TEMPERATURE EXCEEDS 80 DEGREES BUT BOILER DOES NOT MODULATE / SHUT OFF

CHARACTERISTIC TEST FROM OBSERVATION BOILER MODULATION (OVERHEAT)

Next: !p1475

BOILER GOES TO OVERHEAT BEFORE REACHING TEMPERATURE

CHARACTERISTIC TEST FROM OBSERVATION BOILER MODULATION (OVERHEAT)

Next: p1477

SUMP UNSATISFACTORY

Next: !p1480

FLUE MANIFOLD UNSATISFACTORY

Next: !p1482

SUMP UNSATISFACTORY

Next: !p1485

FLUE MANIFOLD UNSATISFACTORY

Next: !p1487

FLUE MANIFOLD UNSATISFACTORY

Next: !p151

SUMP UNSATISFACTORY

Next: !p153

DISPLAY SHOWS - - TWO DASHES

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY AND SELF CHECK

Next: p1790

INLET PRESSURE DOES NOT CHANGE

CHARACTERISTIC TEST FROM PRESSURE GAS INLET (BLIP TEST)

Next: p185

INLET PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET (BLIP TEST)

Next: !p187

DHW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1878

DHW DEMAND NOT RECOGNISED

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1880

COMBUSTION TEST FAILED

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p1895

BURNER DROPS OUT ON MINIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p1897

BURNER DROPS OUT ON MAXIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p1899

FLUE MANIFOLD UNSATISFACTORY

Next: !p1910

SUMP UNSATISFACTORY

Next: !p1912

FLUE MANIFOLD UNSATISFACTORY

Next: !p1922

SUMP UNSATISFACTORY

Next: !p1924

BURNER CUTS OUT BEFORE BOILER REACHES TEMPERATURE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1956

SUMP UNSATISFACTORY

Next: !p205

FLUE MANIFOLD UNSATISFACTORY

Next: !p207

RADIATORS TOO HOT

CHARACTERISTIC TEST FROM OPERATION CH

Next: p234

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p39

BOILER REMAINS LIT BUT RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM OPERATION CH

Next: p395

NO DISPLAY SEEN

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY AND SELF CHECK

Next: p1595

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p41

BOILER REACHES TEMPERATURE BUT SYSTEM DOES NOT HEAT

CHARACTERISTIC TEST FROM OPERATION CH

Next: p411

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY AND SELF CHECK

Next: p7

GAS RATE LOW

Next: p659

UNABLE TO GAS RATE (EG LPG)

Next: p661

DISPLAY CHANGES TO FLOW TEMPERATURE BUT FAN NEVER PAUSES

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS

Next: p1335

DISPLAY REMAINS ON 00

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS

Next: p1793

BOILER FIRES WITH NO HEATING OR HOT WATER DEMAND OR FP SHOWN ON DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY AND SELF CHECK

Next: p9

14/08/2023 10:37:57 2301_3_50_1 29/11/2023 12:30:19

17/08/2023 11:13:53

Next: End

VOLTAGE FAN (AT PCB) - MAINS

GAIN ACCESS TO PCB (

Next: p1016, ?1017, ?1019

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p1031, f1032

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: !p1033, !f1034

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p1037, f1038

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p1039, !f1040

VOLTAGE MAINS INPUT - F7 FAULT CODE

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK (USE INSULATION MAT AS NECESSARY)

Next: !p1043, !f1044

OBSERVATION RESET BOILER F9

Next: p1590, !f1048

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: !p1053, !f1054

VOLTAGE GAS VALVE AT PCB

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p1057, !f1058

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p1061, !f1062

VOLTAGE FAN CONTROL (AT PCB)

REMOVE DC ELECTRICAL

Next: !p1067, !f1068

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p1075, !f1076

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p1087, !f1088

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: !p1091, !f1092

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p1097, !f1098

VOLTAGE FAN (AT PCB) - MAINS

GAIN ACCESS TO PCB (

Next: !p1103, ?1104, ?1106

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p1133, !f1134

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1305, !f1308

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p1417, !f1419

OBSERVATION IS BOILER CURRENTLY GOING TO FD (FAULT CODE)

Next: p1557, f1580

VOLTAGE WATER FLOW SENSOR AT PCB (FROM TURBINE)

PULL CONNECTOR X6 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p1326, !f1327

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p1348, !f1349

INSPECTION SYSTEM FILLED AND VENTED

Next: p1581, !f1582

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1593, !f1594

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p1598, f1599

3AMP FUSE FAULTY

Next: !p1600, !f1601

PCB FUSE FAULTY

Next: !p1606, !f1607

INFORMATION INTEGRAL FUSE

Next: !p1610, !f1611

RESISTANCE DETECTION LEAD

DISCONNECT FLAME SEN

Next: !p162, !f163

OBSERVATION IS BOILER SHOWING FU

ENSURE BOILER IS COOL

Next: p1614, f1615

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1616, !f1617

OBSERVATION DISCONNECT OUTDOOR SENSOR - PREMADE CONNECTION (CH OP)

DISCONNECT WIRES MARKED "WEATHER COMPENSATION"
AT TOP RIGHT OF PCB HOUSING AND MAKE SAFE

Next: !p1681, !f1682

INSPECTION THERMISTOR FITMENT

Next: p1709, !f1708

RESISTANCE FAN AND MAINS HARNESS

REMOVE CONNECTOR X1 FROM THE PCB

Next: p1717, f1718

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p1719, !f1720

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1723, !f1724

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p1727, !f1728

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: p174, f1132

RESISTANCE PUMP

REMOVE PUMP COVER / PLUG

Next: p1731, !f1732

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p1737, !f1738

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1741, !f1742

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p1759, !f1760

OBSERVATION LINK OUT OPENTHERM

DISCONNECT OPENTHERM CONNECTIONS AND MAKE SAFE
FIT A WIRE LINK BETWEEN THE OPENTHERM TERMINALS

Next: !p1796, f1797

INSPECTION SL1 LINK

Next: p1798, !f1799

VOLTAGE EXTERNAL CONTROLS

GAIN ACCESS TO THE BOILERS MAIN TERMINAL STRIP (USE INSULATION MAT AS REQUIRED)

Next: !p1806, !f1807

VOLTAGE WATER FLOW SENSOR AT PCB (PERMANENT)

Next: p1835, !f1836

VOLTAGE WATER FLOW SENSOR AT PCB (PERMANENT)

Next: p1840, !f1841

OBSERVATION DISCONNECT FLOW SENSOR

RECONNECT CONNECTOR

Next: !p1851, !f1852

RESISTANCE CYLINDER THERMOSTAT

DISCONNECT THE COMMON WIRE FROM THE THERMOSTAT
TURN CYLINDER THERMOSTAT TO ITS MAX SETTING

Next: p1885, !f1886

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p1908, ?1909, ?1911

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p192, !f1251

RESISTANCE OUTDOOR SENSOR (QADAI)

GAIN ACCESS TO PCB
DISCONNECT PLUG X8 FROM THE PCB

Next: !p1931, !f1932

INFORMATION S PLAN WIRING DIAGRAM

Next: p1934, !f1935

RESISTANCE CYLINDER THERMOSTAT

DISCONNECT THE COMMON WIRE FROM THE THERMOSTAT
TURN CYLINDER THERMOSTAT TO ITS MAX SETTING

Next: p1947, !f1948

INSPECTION SYSTEM FILLED AND VENTED

Next: p1959, !f1960

OBSERVATION AMBIENT TEMPERATURE

Next: p67, !f68

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p763, !f764

OBSERVATION BOILER RESET - OVERHEAT

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p809, f810

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p811, !f812

OBSERVATION POWER OFF DOES BOILER RESET

WAIT APPROXIMATELY 15 SECONDS

Next: !p937, !f938

RESISTANCE DETECTION LEAD AND HARNESS

DISCONNECT FLAME SEN

Next: p941, f942

RESISTANCE DETECTION LEAD

DISCONNECT FLAME SEN

Next: !p1244, !f1245

VOLTAGE FAN CONTROL (AT PCB)

REMOVE DC ELECTRICAL

Next: p1023, !f1024

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN (3 PIN PLUG)
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1021, !f1193

RESISTANCE HARNESS FAN CONTROL

REMOVE LOW VOLTAGE CONNECTOR FROM FAN (5 PIN PLUG)
PULL X5 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p1025, !f1026

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN (3 PIN PLUG)
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1027, !f1192

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN (3 PIN PLUG)
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1108, !f1194

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p1135, !f1136

INSPECTION SYSTEM FILLED AND VENTED

Next: p1287, !f1296

PUMP LIMPET TEST

Next: p1537, !f1297

FAULT CODES

Next: !p14, !f15

OBSERVATION DISCONNECT OUTDOOR SENSOR - PREMADE CONNECTION

DISCONNECT WIRES MARKED "WEATHER COMPENSATION"
AT TOP RIGHT OF PCB HOUSING AND MAKE SAFE

Next: !p1306, !f1307

INSPECTION SPARK OUTPUT

REMOVE THE HT LEAD F

Next: p172, f173

OBSERVATION DOES BOILER GO TO FD FAULT

Next: p1358, f1347

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1665, !f1351

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p158, !f159

INSPECTION SYSTEM FILLED AND VENTED

Next: p1647, !f1360

PUMP LIMPET TEST

Next: p1361, !f1362

VOLTAGE WATER FLOW SENSOR AT PCB (FROM TURBINE)

PULL CONNECTOR X6 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p1363, f1834

INSPECTION CONDENSATE

Next: p138, !f139

INSPECTION EXTERNAL BYPASS

Next: p1377, !f1378

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p1379, !f1380

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1381, !f1382

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p140, !f141

OBSERVATION PUMP RUNS

Next: p1383, !f1700

PUMP LIMPET TEST

Next: p1389, !f1390

TEMPERATURE DIFFERENTIAL FLOW & RETURN

CH TEMPERATURE CONTROL SET TO MAX
ATTACH TEMPERATURE CLAMP TO THE FLOW AND RETURN PIPES

Next: p1391, !f1392

OBSERVATION BOILER MODULATION (OVERHEAT)

ATTACH TEMPERATURE CLAMP TO FLOW PIPE ON RIGHT HAND SIDE OF BOILER

Next: p1393, ?1395, ?1397

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p1404, ?1405, ?1407

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p1399, ?1400, ?1402

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p142, !f143

INSPECTION EXTERNAL BYPASS

Next: !p1410, !f1411

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1418, !f1488

INFORMATION FLOW/RETURN REVERSED

Next: p1489, !f1421

INSPECTION FLUE

Next: p144, !f145

INSPECTION SYSTEM FILLED AND VENTED

Next: p1423, !f1424

INSPECTION EXTERNAL BYPASS

Next: p1459, !f1426

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p146, !f147

OBSERVATION PUMP RUNS

Next: p1460, !f1696

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p148, ?150, ?152

PUMP LIMPET TEST

Next: p1468, !f1469

TEMPERATURE DIFFERENTIAL FLOW & RETURN

CH TEMPERATURE CONTROL SET TO MAX
ATTACH TEMPERATURE CLAMP TO THE FLOW AND RETURN PIPES

Next: p1470, !f1471

OBSERVATION BOILER MODULATION (OVERHEAT)

ATTACH TEMPERATURE CLAMP TO FLOW PIPE ON RIGHT HAND SIDE OF BOILER

Next: p1472, ?1474, ?1476

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p1483, ?1484, ?1486

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p1478, ?1479, ?1481

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p154, !f155

OBSERVATION BOILER RESET - FA

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p1422, !f1523

VOLTAGE WATER FLOW SENSOR AT PCB (FROM TURBINE)

PULL CONNECTOR X6 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p1538, f1839

INSPECTION BURNER

REMOVE THE BURNER

Next: !p156, !f157

OBSERVATION PUMP RUNS

Next: p1278, !f1698

RESISTANCE DETECTION LEAD AND HARNESS

DISCONNECT FLAME SEN

Next: p1825, f161

PUMP LIMPET TEST

Next: p1583, !f1588

INSPECTION EXTERNAL BYPASS

Next: p1584, !f1587

TEMPERATURE DIFFERENTIAL FLOW & RETURN

CH TEMPERATURE CONTROL SET TO MAX
ATTACH TEMPERATURE CLAMP TO THE FLOW AND RETURN PIPES

Next: !p1589, !f1586

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p1591, f1592

VOLTAGE MAINS POWER SUPPLY AT TERMINAL BLOCK

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK (USE INSULATION MAT AS NECESSARY)

Next: p1596, f1597

VOLTAGE MAINS POWER SUPPLY AT PCB

GAIN ACCESS TO PCB (

Next: p1602, !f1603

RESISTANCE FUSE F2 (APPLIANCE)

Next: p1844, f1605

RESISTANCE PCB INTEGRAL FUSE

Next: !p1608, f1609

INSPECTION SYSTEM FILLED AND VENTED

Next: p1620, !f1769

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: !p1618, !f1619

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p1626, !f1627

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1628, !f1629

OBSERVATION PUMP RUNS

Next: p1630, !f1812

PUMP LIMPET TEST

Next: p1701, !f1637

OBSERVATION PUMP RUNS

Next: p1359, !f1663

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1666, !f1667

OBSERVATION DISCONNECT OUTDOOR SENSOR - PREMADE CONNECTION

DISCONNECT WIRES MARKED "WEATHER COMPENSATION"
AT TOP RIGHT OF PCB HOUSING AND MAKE SAFE

Next: !p1668, !f1669

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1674, !f1675

OBSERVATION DISCONNECT OUTDOOR SENSOR - PREMADE CONNECTION

DISCONNECT WIRES MARKED "WEATHER COMPENSATION"
AT TOP RIGHT OF PCB HOUSING AND MAKE SAFE

Next: !p1676, !f1677

OBSERVATION IS WEATHER COMPENSATION FITTED - CH OP

Next: p1679, f1680

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p1683, !f1684

INSPECTION CONDENSATE

Next: p1685, !f1686

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p1687, !f1688

INSPECTION BURNER

REMOVE THE BURNER

Next: p1689, !f1690

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p1691, !f1692

INSPECTION FLUE

Next: !p1693, !f1694

INSPECTION EXTERNAL BYPASS

Next: p1702, !f1703

TEMPERATURE DIFFERENTIAL FLOW & RETURN

CH TEMPERATURE CONTROL SET TO MAX
ATTACH TEMPERATURE CLAMP TO THE FLOW AND RETURN PIPES

Next: !p1704, !f1705

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p1710, !f1711

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1713, !f1712

OBSERVATION BOILER RESET L7

Next: !p1813, !f1814

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p1721, f1722

INSPECTION CONDENSATE

Next: p180, !f181

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p1725, f1726

RESISTANCE FAN AND MAINS HARNESS

REMOVE CONNECTOR X1 FROM THE PCB

Next: p1735, f1736

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p1756, f1740

RESISTANCE HARNESS SPARK GENERATOR

REMOVE CONNECTOR FROM SPARK GENERATOR
PULL X1 AND X2 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p176, !f177

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p1765, f1758

RESISTANCE IGNITION LEAD

DISCONNECT BOTH ENDS OF THE SPARK (HT) LEAD

Next: !p178, !f179

OBSERVATION REMOVE PERMANENT MAINS SUPPLY TO APPLIANCE

REMOVE PLUG FOR INCOMING MAINS TERMINAL TO BOILER AND PLACE IN A SAFE LOCATION

Next: !p1766, !f1767

INSPECTION SELECTOR SWITCH KNOB

Next: !p1791, !f1792

OBSERVATION TYPE OF EXTERNAL CONTROLS

Next: p1794, f1795

VOLTAGE EXTERNAL CONTROLS AT PCB

GAIN ACCESS TO PCB (

Next: p1804, f1805

RESISTANCE OPENTHERM CONNECTIONS

DISCONNECT PLUG X8 FROM PCB
ENSURE LINK ON "OPENTHERM" TERMINALS IS STILL FITTED

Next: p1800, !f1801

OBSERVATION DISCONNECT OPENTHERM

REMOVE PLUG MARKED "OPENTHERM | WEATHER COMPENSATION" AND MAKE SAFE

Next: !p32, !f33

PRESSURE GAS INLET (BLIP TEST)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p182, ?184, ?186

RESISTANCE EXTERNAL CONTROLS MAINS

DISCONNECT X2 FROM THE PCB
PULL X1 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: p1862, !f1803

INSPECTION OPENTHERM LINK

Next: p1808, !f1809

RESISTANCE OPENTHERM CONNECTIONS

DISCONNECT PLUG X8 FROM PCB
ENSURE LINK ON "OPENTHERM" TERMINALS IS STILL FITTED

Next: p1856, !f1811

INSPECTION FLUE

Next: p1817, !f1818

INSPECTION SPARK ELECTRODE

CAREFULLY REMOVE THE

Next: p1819, !f1820

INSPECTION BURNER

REMOVE THE BURNER

Next: p1821, !f1822

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p1816, ?204, ?206

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: !p1823, !f1824

INSPECTION FLUE

Next: p1826, !f1827

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p1828, !f1829

INSPECTION BURNER

REMOVE THE BURNER

Next: !p1830, !f1831

RESISTANCE HARNESS WATER FLOW SENSOR

GAIN ACCESS TO PCB
REMOVE CONNECTOR TO FLOW SENSOR
PULL X6 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1837, !f1838

RESISTANCE HARNESS WATER FLOW SENSOR

GAIN ACCESS TO PCB
REMOVE CONNECTOR TO FLOW SENSOR
PULL X6 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1842, !f1843

OBSERVATION DISCONNECT X6

REMOVE CONNECTOR X6 AT THE PCB

Next: p1604, f1850

VOLTAGE GAS VALVE AT PCB

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: p188, !f189

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p1854, !f1855

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1859, !f1858

OBSERVATION DISCONNECT OUTDOOR SENSOR - PREMADE CONNECTION

DISCONNECT WIRES MARKED "WEATHER COMPENSATION"
AT TOP RIGHT OF PCB HOUSING AND MAKE SAFE

Next: !p1860, !f1861

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1863, !f1864

OBSERVATION DISCONNECT OUTDOOR SENSOR - PREMADE CONNECTION

DISCONNECT WIRES MARKED "WEATHER COMPENSATION"
AT TOP RIGHT OF PCB HOUSING AND MAKE SAFE

Next: !p1865, !f1866

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1942, !f1890

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p190, f191

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1881, !f1882

VOLTAGE SWITCH LIVE 2 FOR DHW

GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)

Next: p1952, f1884

VOLTAGE SWITCH LIVE 2 FOR DHW (HW OFF ISOLATED)

DISCONNECT HW OFF WI

Next: !p1887, !f1888

PRESSURE GAS INLET (MAXIMUM RATE)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1904, !f1905

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: !p1902, !f1903

PRESSURE GAS INLET (MAXIMUM RATE)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: !p1900, !f1901

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p194, !f195

INSPECTION AIR INLET INTEGRITY

REFIT COMBUSTION CHA

Next: p1906, f1907

INSPECTION CONDENSATE

Next: p1913, !f1914

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p1915, !f1916

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p1917, !f1918

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p1919, ?1921, ?1923

INSPECTION BURNER

REMOVE THE BURNER

Next: p1925, !f1926

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: !p1927, !f1928

INFORMATION Y PLAN WIRING DIAGRAM

Next: !p1936, !f1937

INSPECTION BURNER

REMOVE THE BURNER

Next: p196, !f197

VOLTAGE SWITCH LIVE 2 FOR DHW

GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)

Next: !p1889, f1946

VOLTAGE SWITCH LIVE 2 FOR DHW (HW OFF ISOLATED)

DISCONNECT HW OFF WI

Next: !p1949, !f1950

VOLTAGE EXTERNAL CONTROLS (DHW DEMAND)

Next: !p1953, !f1954

OBSERVATION DID BOILER MODULATE BEFORE CUTTING OUT

Next: p1957, f1958

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: p1967, !f1968

PUMP LIMPET TEST

Next: p1961, !f1962

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p198, !f199

INSPECTION EXTERNAL BYPASS

Next: p1963, !f1964

TEMPERATURE DIFFERENTIAL FLOW & RETURN

CH TEMPERATURE CONTROL SET TO MAX
ATTACH TEMPERATURE CLAMP TO THE FLOW AND RETURN PIPES

Next: !p1965, !f1966

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: p1977, !f1970

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1979, !f1978

OBSERVATION DISCONNECT OUTDOOR SENSOR - PREMADE CONNECTION

DISCONNECT WIRES MARKED "WEATHER COMPENSATION"
AT TOP RIGHT OF PCB HOUSING AND MAKE SAFE

Next: !p1980, !f1981

INSPECTION FLUE

Next: !p200, !f201

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p390, !f391

VOLTAGE FAN CONTROL (AT PCB)

REMOVE DC ELECTRICAL

Next: p44, !f45

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p1128, !f393

INSPECTION CH CONTROL KNOB

Next: p656, !f397

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN (3 PIN PLUG)
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p42, !f1209

INSPECTION SYSTEM FILLED AND VENTED

Next: p412, !f1375

PUMP LIMPET TEST

Next: p1409, !f419

RESISTANCE HARNESS FAN CONTROL

REMOVE LOW VOLTAGE CONNECTOR FROM FAN (5 PIN PLUG)
PULL X5 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p46, !f47

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN (3 PIN PLUG)
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p48, !f1208

GAS RATE

Next: p657, ?658, ?660

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p700, !f701

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p686, !f1189

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p662, !f663

RESISTANCE SENSOR FLOW

DISCONNECT PLUG FROM FLOW SENSOR

Next: p664, !f665

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1678, !f667

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: p1853, !f70

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p688, !f1188

INSPECTION CONDENSATE

Next: p690, !f691

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p692, !f693

INSPECTION BURNER

REMOVE THE BURNER

Next: p694, !f695

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p696, !f697

INSPECTION FLUE

Next: !p698, !f699

VOLTAGE FAN (AT PCB) - MAINS

GAIN ACCESS TO PCB (

Next: p36, ?38, ?40

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1673, !f703

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p765, !f766

INSPECTION SYSTEM FILLED AND VENTED

Next: p1376, !f1373

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p813, !f814

OBSERVATION WHICH DEMAND IS SHOWING

Next: p18, f66

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p945, !f946

PRESSURE TIGHTNESS TEST INSTALLATION

Next: p947, !f948

OBSERVATION FAULT CODE RESET (L6)

Next: !p949, !f950

System Information

  • Total Tests: 648
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control