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 / + HEAT - WATER FLOW SENSOR ON RIGHT SIDE (ABK ONWARDS)

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

INFORMATION CASE REMOVAL

Next: &1703, !f2

OBSERVATION SELF CHECK AND STANDBY

{ALLDEMANDOFF}
SELECTOR SWITCH SET TO ON

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

TYPE OF DIAGNOSTIC PROCEDURE

Next: &73, !f72

OBSERVATION FAN RUNS CH DEMAND

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

Next: &129, ?76, ?78

OBSERVATION BURNER IGNITES AND ESTABLISHES

ENSURE BOILER IS COOL

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

OPERATION CH

DHW DEMAND TURNED OFF
THERMOSTAT SET TO MAX

Next: &1590, ?233, ?394, ?410, ?1873

OBSERVATION PUMP AND FAN OVER RUN

Next: &nff, !f710

OBSERVATION BOILER MODULATION

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

Next: &709, f762

L1

INTENTIONALLY BLANK - HEADER FOR L1 FAULT CODE

Next: &nff, f808

L2 / F2 - DUMMY GO TO BURNER IGNITES PAGE

OUTSIDE MODEL

Next: &nff, !f934

L5 / C0

OUTSIDE MODEL

Next: &nff, f936

L6

INTENTIONALLY BLANK - HEADER FOR FAULT CODE L6

Next: &nff, f940

FURTHER INVESTIGATION FUSE BLOWN

OUTSIDE MODEL

Next: &nff, f952

F0 / C2

OUTSIDE MODEL

Next: &nff, f974

F3

OUTSIDE MODEL

Next: &nff, f1015

F4

OUTSIDE MODEL

Next: &nff, f1030

F5

OUTSIDE MODEL

Next: &nff, f1036

F7

INTENTIONALLY BLANK - HEADER FOR F7 FAULT CODE

Next: &nff, f1042

F9

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 PUMP RESISTANCE

OUTSIDE MODEL

Next: &nff, f1078

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

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE

OUTSIDE MODEL

Next: &nff, f1111

F6

OUTSIDE MODEL

Next: &nff, f1161

HEADER FOR PCB COMPONENT ON STARTUP

OUTSIDE MODEL

Next: &nff, !f1191

INFORMATION OUTDOOR SENSOR REMEDIAL KIT IDEAL INSTRUCTIONS

Next: &nff, f1882

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

OPERATION DHW

THERMOSTAT SET TO MAX

Next: &1924, ?1591, ?1593

RESISTANCE OUTDOOR SENSOR

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: &nff, !f1678

OBSERVATION DISPLAY OPERATES

{ALLDEMANDOFF}
SELECTOR SWITCH TO IN ON POSITION

Next: &3, ?1704, ?1728

COMBUSTION TEST MAX AND MINIMUM

TURN THE CH TEMP CONTROL KNOB TO THE 10 O'CLOCK POSITION

Next: &711, ?1925, ?1927, ?1929

INFORMATION LOW FLOW RATE

Next: &nff, !f1978

INFORMATION SETTING BOILER TO MAXIMUM OR MINIMUM OUTPUT

TURN THE CH TEMP CONTROL KNOB TO THE 10 O'CLOCK POSITION

Next: &nff, !f2017

HEADER FOR QUICK ACCESS DATA OUTDOOR SENSOR

OUTSIDE MODEL

Next: &nff, f2019

FREQUENCY WATER FLOW SENSOR AT PCB (NOT CURRENTLY USED)

NOT USED - TEST AVAILABLE IN A VERSION

Next: &nff, !f2023

FAN RUNS CH DEMAND

KNOB WHITE - POTENTIOMETERS

Next: End

F2 NO CONTROL VOLTAGE

KIT - PCB - PRIMARY

Next: End

F3 FAN CONTROL

HARNESS - 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)

KIT - PCB - PRIMARY

Next: End

RESISTANCE WRONG (QADAI)

KIT - GAS VALVE

Next: End

NO FAN AT START UP (QADAI)

KIT - PCB - PRIMARY

Next: End

RESISTANCE INCORRECT (QADAI)

KIT - FAN

Next: End

RESISTANCE INCORRECT (QADAI) PUMP

PUMP

Next: End

RESISTANCE WRONG QADAI

UNIT - IGNITOR

Next: End

NO VOLTAGE TO SPARK GENERATOR (QADAI)

KIT - PCB - PRIMARY

Next: End

BLANK FOR DIAGNOSICS LITE

Z DIRECTION

Next: End

OUT OF RANGE (QADAI)

THERMISTOR - CONTROL (RETURN)

Next: End

NO VOLTAGE TO PUMP (QADAI)

KIT - PCB - PRIMARY

Next: End

FURTHER INVESTIGATION FUSE

UNIT - IGNITOR

Next: End

OPERATION CH - RADS TOO HOT

KIT - CUI BOARD 2 POTENTIOMETER

Next: End

OPERATION CH - REMAINS LIT RADS DO NOT HEAT

KIT - CUI BOARD 2 POTENTIOMETER

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

OPERATION CH - BOILER COOL RADS COOL - LPG

INJECTOR ASSEMBLY

Next: End

OPERATION CH - BOILER COOL RADS COOL

INJECTOR ASSEMBLY

Next: End

OPERATION CH - BOILER COOL RADS COOL

GAS INLET PRESSURE

Next: End

STUCK ON STARTUP

KIT - PCB - PRIMARY

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

GAS VALVE FURTHER INVESTIGATION FUSE

HARNESS - MAINS VOLTAGE

Next: End

OBSERVATION PUMP AND FAN RUN - STAYS ON - EXTERNAL CONTROLS

Next: End

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

HARNESS - MAINS VOLTAGE

Next: End

OBSERVATION PUMP AND FAN RUN - IGNORING DEMAND

KIT - CUI BOARD 2 POTENTIOMETER

Next: End

FAN RUNS CH DEMAND 1

Next: End

FD

SYSTEM PRESSURE / AIR

Next: End

FD RUNNING SLOW

PUMP

Next: End

F6 -REMEDIAL KIT

OUTDOOR SENSOR

Next: End

F6 FAN RUNS DHW DEMAND - NO FAN

KIT - PCB - PRIMARY

Next: End

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

OUTDOOR SENSOR

Next: End

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

KIT - PCB - PRIMARY

Next: End

FAULT CODE L3

SYSTEM PRESSURE / AIR

Next: End

OPERATION CH

SYSTEM PRESSURE / AIR

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 / AIR

Next: End

FA L1

Next: End

BURNER BAFFLES OR NOISY

INJECTOR ASSEMBLY

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

KIT - PCB - PRIMARY

Next: End

HYPERLINK

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FD - INTERMITTENT

SYSTEM PRESSURE / AIR

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

DHW OPERATION

Next: End

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

OUTDOOR SENSOR

Next: End

BURNERIGNITES

HARNESS - DETECTION LEAD

Next: End

NEW MODEL FLUEWAYS

KIT - HEAT ENGINE

Next: End

IGNITES BUT BAFFLES OR NOISY

KIT - BURNER

Next: End

BURNER IGNITES

ELECTRODE - DETECTION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

KIT - BURNER

Next: End

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

OUTDOOR SENSOR

Next: End

ON WITH NO DEMAND - FROST

THERMISTOR - CONTROL (RETURN)

Next: End

OUTSIDE MODEL

OUTDOOR SENSOR

Next: End

FAN RUNS DHW DEMAND - NO FANREMAINS ON 0

KIT - PCB - PRIMARY

Next: End

OPERATION DHW OBSERVATION PUMP & FAN RUNS - FAN DOES NOT RUN REMEDIAL KIT NOT RECOGNISING

OUTDOOR SENSOR

Next: End

DHW OPERATION

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

KIT - PCB - PRIMARY + LEAK OR SHORT

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO VOLTAGE TO DISPLAY

KIT - PCB - PRIMARY

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY

HARNESS - CUI TO PRIMARY

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO VOLTAGE TO DISPLAY PARTIAL DISPLAY

KIT - PCB - PRIMARY

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY PARTIAL DISPLAY

HARNESS - CUI TO PRIMARY

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

HARNESS - MAINS VOLTAGE

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

LEAD - IGNITION

Next: End

OPERATION CH - REMAINS LIT RADS ONLY WARM

SYSTEM PRESSURE / AIR

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

FLUE

Next: End

BURNER DOES NOT IGNITE

KIT - SIPHON TRAP

Next: End

SPARK BUT NOT LIGHTING

FLUE

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

SPARK BUT NOT LIGHTING

ELECTRODE - IGNITION

Next: End

SPARKING BUT NO LIGHTING

KIT - HEAT ENGINE

Next: End

OUTDOOR REMEDIAL 3

Z DIRECTION

Next: End

OUTDOOR REMEDIAL 2

Z DIRECTION

Next: End

OPERATION DHW UNSATISFACTORY

CYLINDER THERMOSTAT

Next: End

VOLTAGE TO GAS VALVE

KIT - PCB - PRIMARY

Next: End

OPERATION DHW UNSATISFACTORY

TIMER

Next: End

OPERATION DHW NO DEMAND

CYLINDER THERMOSTAT

Next: End

OPERATION DHW NO DEMAND

TIMER

Next: End

OBSERVATION PUMP & FAN RUNS - NO FAN - OUTDOOR SENSOR REMEDIALREMAINS ON 0

KIT - PCB - PRIMARY

Next: End

HOT WATER CUTS OUT

THERMISTOR - CONTROL (FLOW)

Next: End

CUTS OUT

THERMISTOR - CONTROL (RETURN)

Next: End

OPERATION CH - CUTS OUT

KIT - CUI BOARD 2 POTENTIOMETER

Next: End

OPERATION CH CUTS OUT

SYSTEM PRESSURE / AIR

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

OPERATION CH - CUTS OUT

KIT - PCB - PRIMARY

Next: End

OPERATION CH - REMEDIAL KIT CUTS OUT

OUTDOOR SENSOR

Next: End

LOW WHEN RUNNING ON MAX RATE

GAS INLET PRESSURE

Next: End

LOW CAUSING COMBUSTION ISSUES

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

INJECTOR ASSEMBLY

Next: End

BURNER DOES NOT IGNITE

KIT - BURNER

Next: End

RECTIFICATION ELECTRODE NOT ESTABLISHING DROPPING OUT AT MINIMUM

ELECTRODE - DETECTION

Next: End

INFORMATION LOW FLOW RATE

Z DIRECTION

Next: End

FD - NO VOLTAGE TO FLOW SWITCH

KIT - PCB - PRIMARY

Next: End

FD - FLOW SENSOR

HARNESS - LOW VOLTAGE

Next: End

BURNER DOES NOT IGNITE

KIT - HEAT ENGINE

Next: End

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

SYSTEM PRESSURE / AIR

Next: End

CASE REMOVAL

Z DIRECTION

Next: End

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

PUMP

Next: End

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

KIT - PCB - PRIMARY

Next: End

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

HARNESS - LOW VOLTAGE

Next: End

FAN RUNS DHW

THERMISTOR - CONTROL (FLOW)

Next: End

FAN RUNS DHW

THERMISTOR - CONTROL (RETURN)

Next: End

OBSERVATION FAN RUNS - DOES NOT RUN

KIT - CUI BOARD 2 POTENTIOMETER

Next: End

FAN RUNS DHW DEMAND - NO FAN

KIT - PCB - PRIMARY

Next: End

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

KIT - PCB - PRIMARY

Next: End

INFORMATION SETTING BOILER

Z DIRECTION

Next: End

QADAI

OUTDOOR SENSOR (RESISTANCE)

Next: End

DUMMY FREQUENCY TEST

Z DIRECTION

Next: End

QADAI

KIT - SENSOR - FLOW (QADAI)

Next: End

RESTRICTED AFFECTING FGA

KIT - SIPHON TRAP

Next: End

RESTRICTED AFFECTING FGA

INJECTOR ASSEMBLY

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

OBSERVATION PUMP AND FAN RUNS - OPEN CIRCUIT TO PUMP

HARNESS - MAINS VOLTAGE

Next: End

OBSERVATION FAN RUNS CH DEMAND - WIRED FROM SYSTEM

PUMP WIRING

Next: End

FA - WIRED FROM SYSTEM

PUMP WIRING

Next: End

FA - OPEN CIRCUIT TO PUMP

HARNESS - MAINS VOLTAGE

Next: End

FD - WIRED FROM SYSTEM

PUMP WIRING

Next: End

FD - OPEN CIRCUIT TO PUMP

HARNESS - MAINS VOLTAGE

Next: End

L1 - WIRED FROM SYSTEM

PUMP WIRING

Next: End

L1 - OPEN CIRCUIT TO PUMP

HARNESS - MAINS VOLTAGE

Next: End

NEW MODELBLOCKED OR DAMAGED

KIT - BURNER

Next: End

FURTHER INVESTIGATION FUSE

PUMP

Next: End

FURTHER INVESTIGATION WIRED VIA SYSTEM

PUMP

Next: End

FAN FURTHER INVESTIGATION FUSE PUMP WIRED VIA SYSTEM

KIT - FAN

Next: End

GAS VALVE FURTHER INVESTIGATION FUSE PUMP WIRED VIA SYSTEM

HARNESS - MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE PUMP WIRED VIA SYSTEM

UNIT - IGNITOR

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

THERMISTOR - CONTROL (FLOW)

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

THERMISTOR - CONTROL (RETURN)

Next: End

OBSERVATION FAN RUNS CH DEMAND - WIRED FROM SYSTEM NO SPARKING

PUMP WIRING

Next: End

OBSERVATION PUMP AND FAN RUNS - OPEN CIRCUIT TO PUMP NO SPARKING

HARNESS - MAINS VOLTAGE

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUNFD NO SPARKING

SYSTEM PRESSURE / AIR

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUNFD RUNNING SLOW NO SPARKING

PUMP

Next: End

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

KIT - PCB - PRIMARY

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUN - FLOW SENSOR NO SPARKING

HARNESS - LOW VOLTAGE

Next: End

COMBUSTION TEST

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 WHITE - POTENTIOMETERS

Next: End

BOILER TO TEMP RADS COOL

PUMP

Next: End

NO FAN AT START UP

KIT - PCB - PRIMARY

Next: End

NO FAN AT START UP FAN CONTROL

HARNESS - 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

KIT - PCB - PRIMARY

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

OBSERVATION BOILER MODULATION#

KIT - CUI BOARD 2 POTENTIOMETER

Next: End

OPERATION CH - REMAINS LIT RADS DO NOT HEAT - LPG

KIT - CUI BOARD 2 POTENTIOMETER

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

KIT - PCB - PRIMARY

Next: End

BURNER DOES NOT ESTABLISH L6

ELECTRODE - DETECTION

Next: End

CODE L6

KIT - GAS VALVE

Next: End

L6 FAULT CODE

KIT - PCB - PRIMARY

Next: End

FAN FURTHER INVESTIGATION FUSE

KIT - FAN

Next: End

FAULT CODE CO OR C2

KIT - BCC CARD

Next: End

F2 NO MAINS TO FAN

KIT - PCB - PRIMARY

Next: End

F2 OVER 15V ON N

KIT - FAN

Next: End

F2 NO FAN AT START UP

KIT - FAN

Next: End

CODE F4

KIT - PCB - PRIMARY

Next: End

CODE F4

HARNESS - LOW VOLTAGE

Next: End

CODE F5

KIT - PCB - PRIMARY

Next: End

CODE F5

HARNESS - LOW VOLTAGE

Next: End

F7 CODE

KIT - PCB - PRIMARY

Next: End

F9

KIT - PCB - PRIMARY

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

PUMP 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)

KIT - PCB - PRIMARY

Next: End

F2 OVER 15V ON N (QADAI)

KIT - FAN

Next: End

PUMP VOLTAGE (MAINS)

RESULT AS EXPECTED

Next: End

FUSE INVESTIGATION

NO FAULT - FUSE INVESTIGATION

Next: End

SPARK GEN FURTHER INVESTIGATION FUSE

HARNESS - MAINS VOLTAGE

Next: End

DHW TOO HOT

KIT - PCB - PRIMARY

Next: End

DHW COOL RADS COOL LPG

KIT - PCB - PRIMARY

Next: End

RECTIFICATION LEAD L6

HARNESS - MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE

KIT - GAS VALVE

Next: End

F6 - OUTDOOR SENSOR REMEDIAL

KIT - PCB - PRIMARY

Next: End

OPERATION CH - DOES NOT REACH TEMP - REMEDIAL KIT

Z DIRECTION

Next: End

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

KIT - PCB - PRIMARY

Next: End

FLOW SWITCH SATISFACTORY

RESULT AS EXPECTED

Next: End

ALL CHECKS OK RETEST MODEL

NO FAULT - OVERHEAT / L1

Next: End

L1 - DOES NOT SHUT OFF

KIT - PCB - PRIMARY

Next: End

L1 - FAULT CODE REOCCURS

KIT - PCB - PRIMARY

Next: End

FAULT CODES 2

Z DIRECTION

Next: End

OPERATION CH - UP TO TEMP RADS COOLD

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FA - DOES NOT SHUT OFF

KIT - PCB - PRIMARY

Next: End

FA - FAULT CODE REOCCURS

KIT - PCB - PRIMARY

Next: End

FA ALL CHECKS OK RETEST MODEL

NO FAULT - OVERHEAT / L1

Next: End

FA

KIT - REPLACEMENT - SUMP COVER

Next: End

FA

MANIFOLD - FLUE

Next: End

FD - STUCK IN FAULT

KIT - PCB - PRIMARY

Next: End

FD

NO FAULT - FD

Next: End

DHW OPERATION 2

Next: End

BURNER IGNITES AND ESTABLISHES - FLAME SENSE

HARNESS - MAINS VOLTAGE

Next: End

L1

KIT - REPLACEMENT - SUMP COVER

Next: End

L1

MANIFOLD - FLUE

Next: End

BURNER DOES NOT IGNITELEAKING POCBAFFLES

MANIFOLD - FLUE

Next: End

BURNER DOES NOT IGNITELEAKING POCBAFFLES

KIT - REPLACEMENT - SUMP COVER

Next: End

IGNITES BUT BAFLLES OR NOISY

KIT - GAS VALVE

Next: End

FLAME SENSE BURNER IGNITES DOES NOT ESTABLISH

KIT - PCB - PRIMARY

Next: End

FA - REOCCURS

KIT - REPLACEMENT - SUMP COVER

Next: End

FA L1 - REOCCURS

MANIFOLD - FLUE

Next: End

POWER UP - FIRING WITH NO FROST DEMAND

KIT - PCB - PRIMARY

Next: End

DHW OPERATION WEATHER COMP

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

KIT - PCB - PRIMARY

Next: End

INTEGRAL FUSE FATIGUED

KIT - PCB - PRIMARY

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY

KIT - CUI BOARD 2 POTENTIOMETER

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY PARTIAL DISPLAY

KIT - CUI BOARD 2 POTENTIOMETER

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

UNIT - IGNITOR

Next: End

BURNER DOES NOT IGNITE

KIT - GAS VALVE

Next: End

POOR SUPPLY

GAS INLET PRESSURE

Next: End

OUTDOOR SENSOR REMEDIAL

Z DIRECTION

Next: End

OPERATION DHW UNSATISFACTORY

WIRING FAULT

Next: End

OPERATION DHW NO DEMAND

WIRING FAULT

Next: End

OBSERVATION PUMP FAN RUNS - REMEDIAL KITREMAINS ON 0

OUTDOOR SENSOR

Next: End

OPERATION CH - CUTS OUT

KIT - SENSOR - FLOW

Next: End

NOT OPENING - MECHANICAL

KIT - GAS VALVE

Next: End

OPERATION CH - OUTDOOR SENSOR REMEDIAL CUTS OUT

KIT - PCB - PRIMARY

Next: End

WRONG MIX ON MAXIMUM

KIT - GAS VALVE

Next: End

WRONG MIX ON MINIMUM

KIT - GAS VALVE

Next: End

SPARK BUT NOT LIGHTING

KIT - GAS VALVE

Next: End

FD

KIT - SENSOR - FLOW

Next: End

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

KIT - SENSOR - FLOW

Next: End

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

OUTDOOR SENSOR

Next: End

OUTDOOR SENSOR

RESULT AS EXPECTED

Next: End

COMBUSTION TEST FAILED

MANIFOLD - FLUE

Next: End

COMBUSTION TEST FAILED

KIT - REPLACEMENT - SUMP COVER

Next: End

WRONG MIX ON MAX AND MIN

KIT - GAS VALVE

Next: End

OBSERVATION PUMP AND FAN RUNS

PUMP

Next: End

BURNER DOES NOT IGNITELEAKING POC

KIT - REPLACEMENT - SUMP COVER

Next: End

OBSERVATION PUMP AND FAN RUNS - NO VOLTAGE TO PUMP

KIT - PCB - PRIMARY

Next: End

OBSERVATION FAN RUNS CH DEMAND - WIRED VIA BOILER

PUMP WIRING

Next: End

FA

PUMP

Next: End

FA - WIRED VIA BOILER

PUMP WIRING

Next: End

FA - NO VOLTAGE TO PUMP

KIT - PCB - PRIMARY

Next: End

BURNER DOES NOT IGNITELEAKING POC

MANIFOLD - FLUE

Next: End

FD

PUMP

Next: End

FD - WIRED VIA BOILER

PUMP WIRING

Next: End

FD - NO VOLTAGE TO PUMP

KIT - PCB - PRIMARY

Next: End

L1

PUMP

Next: End

L1 - WIRED VIA BOILER

PUMP WIRING

Next: End

L1 OBSERVATION PUMP AND FAN RUNS - NO VOLTAGE TO PUMP

KIT - PCB - PRIMARY

Next: End

FUSE INVESTIGATION

PUMP WIRING

Next: End

FAN FURTHER INVESTIGATION FUSE PUMP WIRED VIA SYSTEM

HARNESS - MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE PUMP WIRED VIA SYSTEM

KIT - GAS VALVE

Next: End

FUSE INVESTIGATION PUMP WIRED VIA SYSTEM

NO FAULT - FUSE INVESTIGATION

Next: End

SPARK GEN FURTHER INVESTIGATION FUSE PUMP WIRED VIA SYSTEM

HARNESS - MAINS VOLTAGE

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

KIT - PCB - PRIMARY

Next: End

OBSERVATION PUMP AND FAN RUNS NO SPARKING

PUMP

Next: End

OBSERVATION FAN RUNS CH DEMAND - WIRED VIA BOILER NO SPARKING

PUMP WIRING

Next: End

OBSERVATION PUMP AND FAN RUNS - NO VOLTAGE TO PUMP NO SPARKING

KIT - PCB - PRIMARY

Next: End

OBSERVATION PUMP AND FAN RUNS - CHANGES BUT FAN DOES NOT RUN NO SPARKING

KIT - SENSOR - FLOW

Next: End

ON WITH NO DEMAND - FROST

KIT - PCB - PRIMARY

Next: End

NO MAINS TO FAN AT START UP

KIT - PCB - PRIMARY

Next: End

ELECTRICAL OVER 15V ON N

KIT - FAN

Next: End

NO FAN AT START UP

KIT - FAN

Next: End

DHW COOL RADS COOL

KIT - PCB - PRIMARY

Next: End

OBSERVATION BOILER MODULATION

KIT - PCB - PRIMARY

Next: End

L1 - STUCK IN FAULT

KIT - PCB - PRIMARY

Next: End

L5

Z DIRECTION

Next: End

BLANK FOR L6 FAULT CODE

Z DIRECTION

Next: End

FAN FURTHER INVESTIGATION FUSE

HARNESS - MAINS VOLTAGE

Next: End

CODE C0

KIT - PCB - PRIMARY

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 SELF CHECK AND STANDBY

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 85 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

FLOW TEMPERATURE EXCEEDS 85 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

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1485

FLUE MANIFOLD UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1487

DHW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1592

DHW DEMAND NOT RECOGNISED

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1691

SUMP UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1620

FLUE MANIFOLD UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1622

FLUE MANIFOLD UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1638

SUMP UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1640

SUMP UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1668

FLUE MANIFOLD UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p1670

NO DISPLAY SEEN

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY OPERATES

Next: p1705

PART OF DISPLAY NOT WORKING (8 DOES NOT INITIALLY SHOW)

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY OPERATES

Next: p1729

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

BURNER CUTS OUT BEFORE BOILER REACHES TEMPERATURE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1874

COMBUSTION TEST FAILED

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p1926

BURNER DROPS OUT ON MINIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p1928

BURNER DROPS OUT ON MAXIMUM RATE

CHARACTERISTIC TEST FROM COMBUSTION TEST MAX AND MINIMUM

Next: p1930

FLUE MANIFOLD UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p2035

SUMP UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p2037

SUMP UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

Next: !p205

FLUE MANIFOLD UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION SUMP AND FLUE MANIFOLD

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: p1734

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 SELF CHECK AND STANDBY

Next: p7

GAS RATE LOW

CHARACTERISTIC TEST FROM GAS USAGE

Next: p659

UNABLE TO GAS RATE (EG LPG)

CHARACTERISTIC TEST FROM GAS USAGE

Next: p661

DISPLAY CHANGES TO C BUT FAN NEVER PAUSES

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS CH DEMAND

Next: p1989

DISPLAY REMAINS ON 0

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS CH DEMAND

Next: p100

BOILER RUNS WITH NO DEMAND (C OR F SHOWN ON DISPLAY)

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK AND STANDBY

Next: p9

13/10/2023 09:18:56 2401_1_46_1 22/02/2024 10:43:26

16/01/2024 10:35:09

Next: End

VOLTAGE FAN (AT PCB) - MAINS

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: p1016, ?1017, ?1019

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 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 X6 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: !p1047, !f1048

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

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 CONNECTOR FROM FAN ASSEMBLY (5 PIN CONNECTOR) AND MAKE SAFE

Next: !p1067, !f1068

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p1075, !f1076

RESISTANCE PUMP

REMOVE PUMP COVER / PLUG

Next: !p1079, !f1080

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 TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p1097, !f1098

VOLTAGE FAN (AT PCB) - MAINS

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p1103, ?1104, ?1106

VOLTAGE PUMP AT PCB

GAIN ACCESS TO PCB (

Next: !p1112, !f1113

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p1126, !f1127

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1305, !f1308

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1417, !f1419

OBSERVATION IS BOILER CURRENTLY GOING TO FD (FAULT CODE)

Next: p1557, f1580

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT (CH OP)

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p1311, !f1312

VOLTAGE WATER FLOW SENSOR AT PCB (FROM SENSOR)

Next: !p1326, !f2024

INSPECTION SYSTEM FILLED AND VENTED

Next: p1581, !f1582

RESISTANCE DETECTION LEAD

DISCONNECT FLAME SEN

Next: !p162, !f163

VOLTAGE MAINS POWER SUPPLY AT TERMINAL BLOCK

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

Next: p1708, f1709

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p1710, f1711

3AMP FUSE FAULTY

Next: !p1712, !f1713

PCB FUSE FAULTY

Next: !p1718, !f1719

INFORMATION INTEGRAL FUSE

Next: !p1722, !f1723

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: p174, f2123

INFORMATION S PLAN WIRING DIAGRAM

Next: p1883, !f1886

RESISTANCE CYLINDER THERMOSTAT

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

Next: p1888, !f1889

RESISTANCE CYLINDER THERMOSTAT

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

Next: p1893, !f1894

INSPECTION SYSTEM FILLED AND VENTED

Next: p1909, !f1910

RESISTANCE HARNESS GAS VALVE

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

Next: !p192, !f1251

VOLTAGE WATER FLOW SENSOR AT PCB (PERMANENT)

Next: p1985, !f1986

OBSERVATION PUMP RUNS

Next: p1992, f2042

RESISTANCE OUTDOOR SENSOR (QADAI)

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p2020, !f2021

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO ELECTRICAL CONNECTIONS AT PUMP

Next: !p2048, f2054

OBSERVATION HOW IS PUMP WIRED

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK AT THE BOILER

Next: p2055, !f2061

RESISTANCE HARNESS PUMP

DISCONNECT X1 FROM THE PCB

Next: !p2058, !f2059

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO ELECTRICAL CONNECTIONS AT PUMP

Next: !p2063, f2064

OBSERVATION HOW IS PUMP WIRED

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK AT THE BOILER

Next: p2065, !f2066

RESISTANCE HARNESS PUMP

DISCONNECT X1 FROM THE PCB

Next: !p2069, !f2070

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO ELECTRICAL CONNECTIONS AT PUMP

Next: !p2072, f2073

OBSERVATION HOW IS PUMP WIRED

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK AT THE BOILER

Next: p2074, !f2075

RESISTANCE HARNESS PUMP

DISCONNECT X1 FROM THE PCB

Next: !p2078, !f2079

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO ELECTRICAL CONNECTIONS AT PUMP

Next: !p2081, f2082

OBSERVATION HOW IS PUMP WIRED

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK AT THE BOILER

Next: p2083, !f2084

RESISTANCE HARNESS PUMP

DISCONNECT X1 FROM THE PCB

Next: !p2087, !f2088

RESISTANCE PUMP

REMOVE PUMP COVER / PLUG

Next: !p2105, !f2106

RESISTANCE PUMP

REMOVE PUMP COVER / PLUG

Next: p2110, !f2109

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p2113, !f2114

RESISTANCE HARNESS GAS VALVE

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

Next: !p2117, !f2118

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p2121, !f2122

VOLTAGE WATER FLOW SENSOR AT PCB (FROM SENSOR)

Next: p2124, f2129

OBSERVATION PUMP RUNS

Next: p2130, f2131

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO ELECTRICAL CONNECTIONS AT PUMP

Next: !p2132, f2133

OBSERVATION HOW IS PUMP WIRED

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK AT THE BOILER

Next: p2134, !f2135

RESISTANCE HARNESS PUMP

DISCONNECT X1 FROM THE PCB

Next: !p2138, !f2139

OBSERVATION AMBIENT TEMPERATURE

Next: p67, !f68

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p763, !f764

OBSERVATION BOILER RESET - OVERHEAT

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p809, f810

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p811, !f812

OBSERVATION POWER OFF DOES BOILER RESET

WAIT APPROXIMATELY 15 SECONDS

Next: !p937, !f938

RESISTANCE DETECTION LEAD AND HARNESS

DISCONNECT FLAME SENSE LEAD FROM THE ELECTRODE
REMOVE CONNECTOR X3 FROM THE PCB

Next: p941, f942

RESISTANCE DETECTION LEAD

DISCONNECT FLAME SEN

Next: !p1244, !f1245

OBSERVATION HOW IS PUMP WIRED

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK AT THE BOILER

Next: p2090, f2107

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p959, !f960

RESISTANCE HARNESS GAS VALVE

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

Next: !p1248, !f1249

INFORMATION - RECENTLY REPLACED PCB

Next: !p975, !f976

INSPECTION SELECTOR SWITCH KNOB

Next: p101, !f102

VOLTAGE EXTERNAL CONTROLS

GAIN ACCESS TO THE BOILERS MAIN TERMINAL STRIP

Next: p124, !f128

VOLTAGE FAN CONTROL (AT PCB)

REMOVE DC ELECTRICAL CONNECTOR FROM FAN ASSEMBLY (5 PIN CONNECTOR) AND MAKE SAFE

Next: p1023, !f1024

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOL

Next: !p1021, !f1193

RESISTANCE HARNESS FAN CONTROL

REMOVE LOW VOLTAGE CONNECTOR FROM FAN (5 PIN CONNECTOR)
PULL X8 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p1025, !f1026

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOL

Next: !p1027, !f1192

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOL

Next: !p1108, !f1194

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p1124, f1125

RESISTANCE POTENTIOMETER

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE DISPLAY PCB

Next: !p1130, !f1129

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1314, !f1317

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p1172, !f1185

INSPECTION CONDENSATE

Next: p1174, !f1175

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p1176, !f1177

INSPECTION BURNER

REMOVE THE BURNER

Next: p1178, !f1179

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p1180, !f1181

INSPECTION FLUE

Next: !p1182, !f1183

VOLTAGE EXTERNAL CONTROLS AT PCB

GAIN ACCESS TO PCB (

Next: p1252, !f1250

RESISTANCE SELECTOR SWITCH

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE DISPLAY PCB

Next: p1680, !f1254

INSPECTION SYSTEM FILLED AND VENTED

Next: p1287, !f1296

PUMP LIMPET TEST

Next: p1537, !f1297

FAULT CODES

Next: !p14, !f15

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p1306, !f1307

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p1315, !f1671

INSPECTION SPARK OUTPUT

REMOVE THE HT LEAD F

Next: p172, f173

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p158, !f159

INSPECTION CONDENSATE

Next: p138, !f139

INSPECTION EXTERNAL BYPASS

Next: p1377, !f1378

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1379, !f1380

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1381, !f1382

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p140, !f141

OBSERVATION PUMP RUNS

Next: p1383, f2080

PUMP LIMPET TEST

Next: p1599, !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 INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p142, !f143

INSPECTION EXTERNAL BYPASS

Next: !p1410, !f1411

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1418, !f1488

INFORMATION FLOW/RETURN REVERSED

Next: p1489, !f1421

INSPECTION FLUE

Next: p1623, !f145

INSPECTION SYSTEM FILLED AND VENTED

Next: p1423, !f1424

INSPECTION EXTERNAL BYPASS

Next: p1459, !f1426

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p1641, !f147

OBSERVATION PUMP RUNS

Next: p1460, f2062

PUMP LIMPET TEST

Next: p1647, !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

OBSERVATION BOILER RESET - FA

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p1422, !f1523

VOLTAGE WATER FLOW SENSOR AT PCB (FROM SENSOR)

Next: !p1538, f1984

OBSERVATION PUMP RUNS

Next: p1278, f2071

RESISTANCE DETECTION LEAD AND HARNESS

DISCONNECT FLAME SENSE LEAD FROM THE ELECTRODE
REMOVE CONNECTOR X3 FROM THE PCB

Next: p1793, 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

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1685, !f1596

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT (DHW)

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p1597, !f1598

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p1389, ?1619, ?1621

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p164, !f165

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p144, ?1637, ?1639

INSPECTION BURNER

REMOVE THE BURNER

Next: !p166, !f167

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p1642, !f1643

INSPECTION BURNER

REMOVE THE BURNER

Next: !p1644, !f1645

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p1468, ?1667, ?1669

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p1675, !f1676

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1681, !f1682

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT (NO DEMAND)

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p1897, !f1898

VOLTAGE SWITCH LIVE FOR OUTDOOR SENSOR

GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)

Next: p1595, f1887

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1692, !f1699

VOLTAGE SWITCH LIVE FOR OUTDOOR SENSOR

GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)

Next: p1694, f1892

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT (DHW)

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p1698, !f1697

OBSERVATION DOES FAN RUN

Next: p1706, f1707

VOLTAGE DISPLAY PCB

DISCONNECT THE RIBBON CABLE MARKED X10 AT BOTTOM OF PCB

Next: p1724, !f1725

VOLTAGE MAINS POWER SUPPLY AT PCB

GAIN ACCESS TO PCB (

Next: p1714, !f1715

RESISTANCE FUSE F2 (APPLIANCE)

REMOVE FUSE FROM HOLDER

Next: p1716, f1717

RESISTANCE PCB INTEGRAL FUSE

REMOVE RIBBON CONNECTOR AT BOTTOM OF PCB
UNCLIP AND FLIP THE PCB ONTO ITS BACK

Next: !p1720, f1721

INSPECTION CONDENSATE

Next: p180, !f181

RESISTANCE HARNESS DISPLAY PCB

GAIN ACCESS TO PCB
REMOVE THE RIBBON CABLE JOINING THE TWO PCB'S

Next: !p1726, !f1727

VOLTAGE DISPLAY PCB

DISCONNECT THE RIBBON CABLE MARKED X10 AT BOTTOM OF PCB

Next: p1730, !f1731

RESISTANCE HARNESS DISPLAY PCB

GAIN ACCESS TO PCB
REMOVE THE RIBBON CABLE JOINING THE TWO PCB'S

Next: !p1732, !f1733

INSPECTION SYSTEM FILLED AND VENTED

Next: p395, !f1792

RESISTANCE HARNESS SPARK GENERATOR

REMOVE CONNECTOR FROM SPARK GENERATOR
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p176, !f177

RESISTANCE IGNITION LEAD

DISCONNECT BOTH ENDS OF THE SPARK (HT) LEAD

Next: !p178, !f179

INSPECTION FLUE

Next: p160, !f1803

VOLTAGE EXTERNAL CONTROLS (NO DEMAND)

{ALLDEMANDOFF}
GAIN ACCESS TO THE BOILERS MAIN TERMINAL STRIP

Next: !p32, !f33

PRESSURE GAS INLET (BLIP TEST)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p182, ?184, ?186

INSPECTION FLUE

Next: p1832, !f1818

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p1804, ?204, ?206

INSPECTION FLUE

Next: p190, !f1831

INSPECTION SPARK ELECTRODE

CAREFULLY REMOVE THE

Next: p202, !f1844

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: !p1847, !f1848

VOLTAGE GAS VALVE AT PCB

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: p188, !f189

OBSERVATION DID BOILER MODULATE BEFORE CUTTING OUT

Next: p1901, f1908

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p1821, f191

INFORMATION Y PLAN WIRING DIAGRAM

Next: !p1884, !f1885

VOLTAGE SWITCH LIVE FOR OUTDOOR SENSOR (HW OFF ISOLATED)

DISCONNECT HW OFF WI

Next: !p1890, !f1891

VOLTAGE SWITCH LIVE FOR OUTDOOR SENSOR (HW OFF ISOLATED)

DISCONNECT HW OFF WI

Next: !p1895, !f1896

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p194, !f195

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1902, !f1903

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1904, !f1905

RESISTANCE POTENTIOMETER

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE DISPLAY PCB

Next: p1918, !f1907

PUMP LIMPET TEST

Next: p1911, !f1912

INSPECTION EXTERNAL BYPASS

Next: p1915, !f1914

TEMPERATURE DIFFERENTIAL FLOW & RETURN

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

Next: !p1916, !f1917

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p1919, !f1920

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p1921, !f1922

PRESSURE GAS INLET (MAXIMUM RATE)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2025, !f1938

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: !p1933, !f1976

PRESSURE GAS INLET (MAXIMUM RATE)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: !p1931, !f1932

INSPECTION BURNER

REMOVE THE BURNER

Next: p196, !f197

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: !p198, !f199

RESISTANCE HARNESS WATER FLOW SENSOR

GAIN ACCESS TO PCB
REMOVE CONNECTOR TO FLOW SENSOR
PULL X8 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1987, !f1988

VOLTAGE WATER FLOW SENSOR AT PCB (FROM SENSOR)

Next: p1990, f1991

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p2006, !f2007

INSPECTION SYSTEM FILLED AND VENTED

Next: p1998, !f1999

PUMP LIMPET TEST

Next: p2000, !f2001

VOLTAGE WATER FLOW SENSOR AT PCB (PERMANENT)

Next: p2002, !f2003

RESISTANCE HARNESS WATER FLOW SENSOR

GAIN ACCESS TO PCB
REMOVE CONNECTOR TO FLOW SENSOR
PULL X8 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2004, !f2005

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p2008, !f2009

RESISTANCE POTENTIOMETER

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE DISPLAY PCB

Next: p2010, !f2011

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p2012, !f2013

OBSERVATION DISCONNECT OUTDOOR SENSOR - REMEDIAL KIT (NO FAN)

DISCONNECT CONNECTOR X7 FOR OUTDOOR SENSOR

Next: !p2014, !f2015

INSPECTION BURNER

REMOVE THE BURNER

Next: p1846, !f209

INSPECTION CONDENSATE

Next: p2148, !f2027

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p2028, !f2029

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p2030, !f2031

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p2032, ?2034, ?2036

INSPECTION BURNER

REMOVE THE BURNER

Next: p2038, !f2039

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: !p2040, !f2041

VOLTAGE PUMP AT TERMINAL BLOCK

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

Next: !p2060, f2057

VOLTAGE PUMP AT TERMINAL BLOCK

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

Next: !p2067, f2068

VOLTAGE PUMP AT TERMINAL BLOCK

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

Next: !p2076, f2077

VOLTAGE PUMP AT TERMINAL BLOCK

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

Next: !p2085, f2086

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR X1 FROM THE PCB

Next: p953, f2104

RESISTANCE FAN AND MAINS HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p2111, f2112

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p2115, f2116

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p2119, f2120

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p2125, !f2126

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p2127, !f2128

INSPECTION SYSTEM FILLED AND VENTED

Next: p2140, !f2141

VOLTAGE PUMP AT TERMINAL BLOCK

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

Next: !p2136, f2137

PUMP LIMPET TEST

Next: p2142, !f2143

VOLTAGE WATER FLOW SENSOR AT PCB (PERMANENT)

Next: p2144, !f2145

RESISTANCE HARNESS WATER FLOW SENSOR

GAIN ACCESS TO PCB
REMOVE CONNECTOR TO FLOW SENSOR
PULL X8 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2146, !f2147

INSPECTION FLUE

Next: p2026, !f2164

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p390, !f391

VOLTAGE FAN CONTROL (AT PCB)

REMOVE DC ELECTRICAL CONNECTOR FROM FAN ASSEMBLY (5 PIN CONNECTOR) AND MAKE SAFE

Next: p44, !f45

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1128, !f393

INSPECTION CH CONTROL KNOB

Next: p656, !f397

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOL

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 CONNECTOR)
PULL X8 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p46, !f47

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOL

Next: !p48, !f1208

GAS RATE

TURN THE CH TEMP CONTROL KNOB TO THE 10 O'CLOCK POSITION

Next: p657, ?658, ?660

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

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 TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p664, !f665

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p769, !f667

OBSERVATION IS WEATHER COMPENSATION FITTED - CH OP

Next: p1171, f1310

RESISTANCE SENSOR TEMP FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1674, !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

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: p36, ?38, ?40

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p790, !f703

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p765, !f766

RESISTANCE POTENTIOMETER

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE DISPLAY PCB

Next: !p767, !f768

RESISTANCE POTENTIOMETER

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE DISPLAY PCB

Next: p666, !f789

RESISTANCE POTENTIOMETER

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE DISPLAY PCB

Next: p1151, !f1131

INSPECTION SYSTEM FILLED AND VENTED

Next: p1376, !f1373

RESISTANCE SENSOR TEMP RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

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

RESISTANCE FAN AND MAINS HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p957, f958

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p1123, f962

System Information

  • Total Tests: 675
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control