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 I-MINI AND LOGIC COMBI SERIAL NUMBER ABT ONWARDS - PLASTIC HYDROBLOCK

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

CASE REMOVAL

Next: &3725, !f1228

OBSERVATION DISPLAY OPERATES

SELECTOR SWITCH IN HEATING & HOT WATER POSITION
ENSURE THERE IS NO DEMAND FOR EITHER CH OR DHW

Next: &2908, ?106, ?2909

OBSERVATION DHW FLOW RATE

Next: &39, f28

OBSERVATION PUMP & FAN RUNS DHW DEMAND

SELECTOR SWITCH TO HOT WATER POSITION
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT OFF

Next: &284, ?960, ?962, ?3012

HOT WATER OPERATION

PREHEAT OFF

Next: &1212, ?194, ?196, ?198, ?200, ?202

OBSERVATION BURNER IGNITES AND ESTABLISHES DHW DEMAND

DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT OFF

Next: &193, ?3090, ?3144, ?3160

OPERATION CH

PREHEAT OFF
CH TEMPERATURE CONTROL SET TO MAXIMUM

Next: &958, ?634, ?636, ?638, ?644

OBSERVATION PUMP AND FAN OVER RUN

PREHEAT OFF
APPLY A DEMAND FOR HEATING OR HOT WATER

Next: &nff, !f959

FAULT CODES

Next: &nff, !f1086

F1

OK TO BE BLANK

Next: &nff, f1137

F4

OK TO BE BLANK

Next: &nff, f1146

F5

OK TO BE BLANK

Next: &nff, f1151

L6

Next: &nff, f1192

C2 BCC ERROR

OK TO BE BLANK

Next: &nff, f1206

OBSERVATION BOILER REACTS TO CH DEMAND

PREHEAT OFF
SELECTOR SWITCH TO HEATING AND HOT WATER POSITION

Next: &633, f2439

FURTHER INVESTIGATION FUSES

OK TO BE BLANK

Next: &nff, f1884

F7

OK TO BE BLANK

Next: &nff, f1451

L5

OK TO BE BLANK

Next: &nff, f1455

FA

OK TO BE BLANK

Next: &nff, f1463

HEADER FOR FAULT CODE L1 AND L3

INTENTIONALLY BLANK - HEADER FOR FAULT CODE L1 AND L3

Next: &nff, f1763

F2

OK TO BE BLANK

Next: &nff, f2095

NEW QADAI OPTIONS

OUTSIDE MODEL

Next: &nff, ?2627, ?2629, ?2633, ?2635, ?2637, ?2639, ?2641, ?2643, ?2645, ?2647, ?2649, ?2653, ?2655, ?2657, ?2659, ?2661, ?2704, ?2881, ?3557, ?3566, ?3568

OBSERVATION SELF CHECK AND STANDBY

{ALLDEMANDOFF}
SELECTOR SWITCH IN DHW & CH POSITION

Next: &3010, ?2915, ?2931, ?2953, ?3638

TYPE OF DIAGNOSTIC PROCEDURE

Next: &27, !f3011

F3

OK TO BE BLANK

Next: &nff, f3466

F6

OK TO BE BLANK

Next: &nff, f3481

F9

OK TO BE BLANK

Next: &nff, f3492

HEADER FOR PCB COMPONENT ON STARTUP

OK TO BE BLANK

Next: &nff, !f3496

HEADER FOR DIVERTER VALVE REFITTING PROCEDURE

OK TO BE BLANK

Next: &nff, f3580

INFORMATION XSOL MODEL VERSION

ENSURE HYDROBLOCK OF

Next: &5, !f3726

PREHEAT SATISFACTORY3

KIT - PCB L10 - PRIMARY

Next: End

FAULT CODES

Z DIRECTION

Next: End

F4 - FLOW SENSOR FAULT

THERMISTOR - NO FLOW

Next: End

F5 - RETURN SENSOR FAULT

CONTROL THERMISTOR (RETURN)

Next: End

L6 FAULT CODE

ELECTRODE - DETECTION

Next: End

PUMP SU FAN RUNS SPARKING DOES NOT OCCURTEMP

KIT - PCB L10 - PRIMARY

Next: End

C2 BCC ERROR

KIT - PCB L10 - PRIMARY

Next: End

CASE REMOVAL

Z DIRECTION

Next: End

TO DIVERTER - RADS NOT POOR HOT WATER

HARNESS - WIRING - MAINS

Next: End

BOILER TO TEMP RADS COOL

KIT - PUMP HEAD

Next: End

DHW NOISEY KETTLING

KIT - SIPHON TRAP

Next: End

CH OPERATION BOILER NOISY

THERMISTOR - NO FLOW

Next: End

POOR VOLTAGE

Next: End

WONT RESET L5

KIT - PCB L10 - PRIMARY

Next: End

FA

KIT - PUMP HEAD

Next: End

FAULT CODE FA

CONTROL THERMISTOR (RETURN)

Next: End

FAULT CODE FA

THERMISTOR - NO FLOW

Next: End

FLOW RATE

COLD WATER SUPPLY

Next: End

CALIBRATION LOW BOILER TEMP LOW OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

THERMISTOR - NO FLOW

Next: End

DHW COOL RADS COOL

CONTROL THERMISTOR (RETURN)

Next: End

BOILER TEMP LOW SYSTEM TEMP LOWOPERATION DHW DHW COOL RADS COOL

GAS INLET PRESSURE

Next: End

F1 - LOW WATER FAULT

SYSTEM PRESSURE

Next: End

F1 LOW WATER FAULT

KIT - PRESSURE GAUGE

Next: End

FAULT CODE L3

SYSTEM PRESSURE

Next: End

L3 NO WATER FLOW

KIT - PRESSURE GAUGE

Next: End

BOILR SHUTS DOWN PREMATURELY CHOPERATION

KIT - PUMP HEAD

Next: End

CH OPERATION BOILER NOISY

CONTROL THERMISTOR (RETURN)

Next: End

CALIBRATION LOW BOILER TEMP LOW SYSTEM TEMP LOW

THERMISTOR - NO FLOW

Next: End

CALIBRATION LOW BOILER TEMP LOW SYSTEM TEMP LOW

CONTROL THERMISTOR (RETURN)

Next: End

LOW GAS RATE CH OPERATION

INJECTOR ASSEMBLY

Next: End

VOLTS TO TURBINE (DHW BURNER IGN) 2

KIT - PCB L10 - PRIMARY

Next: End

TO FLOW SWITCH - NO HOT WATER DEMAND

HARNESS - WIRING - SELV

Next: End

F2 FAULT CODE

GAS INLET PRESSURE

Next: End

F2 FAULT CODE

FLUE

Next: End

F2 FAULT CODE

ELECTRODE - DETECTION

Next: End

F2 FAULT CODE

KIT - SIPHON TRAP

Next: End

F2 FAULT CODE

KIT - BURNER

Next: End

F2 FAULT CODE

ELECTRODE - IGNITION

Next: End

F2 FAULT CODE

KIT - HEAT ENGINE

Next: End

F2 FAULT CODE

INJECTOR ASSEMBLY

Next: End

F2 FAULT CODE

KIT - GAS VALVE

Next: End

PREHEAT SATISFACTORY3

KIT - BODY - DIVERTER VALVE C/W PADDLE

Next: End

DHW COOL RADS COOL

KNOB - WHITE / GREY - POTENTIOMETERS

Next: End

FAN RUNS CH DEMAND

KNOB - WHITE / GREY - POTENTIOMETERS

Next: End

CH BOILER TEMP LOW SYSTEM TEMP LOW

KNOB - WHITE / GREY - POTENTIOMETERS

Next: End

L6 - STICKING OPEN

KIT - GAS VALVE

Next: End

L6 FAULT CODE

KIT - PCB L10 - PRIMARY

Next: End

L1 - OVERHEAT FAULT

THERMISTOR - NO FLOW

Next: End

L1 - OVERHEAT FAULT

CONTROL THERMISTOR (RETURN)

Next: End

L1 OR L3 FAULT

THERMISTOR - NO FLOW

Next: End

L1 OR L3 FAULT

CONTROL THERMISTOR (RETURN)

Next: End

NO VOLTAGE TO DIVERTER (QADAI)

KIT - PCB L10 - PRIMARY

Next: End

INCORRECT RESISTANCE (QADAI)

MOTOR DIVERTER VALVE

Next: End

NO VOLTAGE TO SPARK GEN (QADAI)

KIT - PCB L10 - PRIMARY

Next: End

INCORRECT RESISTANCE (QADAI)

UNIT - IGNITOR

Next: End

NO FAN AT START UP QADAI

KIT - PCB L10 - PRIMARY

Next: End

TO FAN POWER - PUMP SHORT TIME START UP QADAI

HARNESS - WIRING - MAINS

Next: End

INCORRECT RESISTANCE (QADAI)

KIT - FAN

Next: End

NO POWER TO PUMP (QADAI)

KIT - PCB L10 - PRIMARY

Next: End

INCORRECT RESISTANCE (QADAI)

KIT - PUMP HEAD

Next: End

RESISTANCE WRONG (QADAI)

KIT - GAS VALVE

Next: End

NO POWER TO GAS VALVE (QADAI)

KIT - PCB L10 - PRIMARY

Next: End

QADAI

THERMISTOR - NO FLOW

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION

Next: End

BLANK FOR DIAGNOSTICS LITE 2

Z DIRECTION

Next: End

QADAI

CONTROL THERMISTOR (RETURN)

Next: End

PUMP RUNS DHW DEMAND

HARNESS (MAIN) - ERP PUMP HARNESS

Next: End

NO PUMP AT STATR UP2

HARNESS - WIRING - MAINS

Next: End

L1

PACK - CH FLOW / PACK - RETURN CH

Next: End

L1

Next: End

INCORRECT RESISTANCE ERP (QADAI)

KIT - PUMP HEAD

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO VOLTAGE TO DISPLAY

KIT - PCB L10 - PRIMARY

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY

HARNESS - CUI TO PRIMARY

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 - WIRING - MAINS

Next: End

BLOWN STANDBY MODE AT POWER UP

FUSE- PCB

Next: End

PCB DAMAGED

KIT - PCB L10 - PRIMARY LEAK OR SHORT

Next: End

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

KIT - PCB L10 - PRIMARY

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY PARTIAL DISPLAY

HARNESS - CUI TO PRIMARY

Next: End

TO FAN POWER - PUMP SHORT TIME START UP

HARNESS - WIRING - MAINS

Next: End

NO FAN AT START UP

KIT - PCB L10 - PRIMARY

Next: End

NO FAN AT START UP

HARNESS - WIRING - SELV

Next: End

FAN DOES NOT RUN

HARNESS - WIRING - MAINS

Next: End

NOT RESPONDING TO HEATING - LINKEDPUMP SU FAN RUNS SPARKING DOES NOT OCCUR

KIT - PCB L10 - PRIMARY

Next: End

POWER UP - PUMP DOES NOT RUN

HARNESS (MAIN) - ERP PUMP HARNESS

Next: End

POWER UP - PUMP DOES NOT RUN NO PUMP AT STATR UP2

HARNESS - WIRING - MAINS

Next: End

FIRES WITH NO DEMAND

FROST PROTECTION (INTERNAL)

Next: End

POWER UP

OPEN TAP OR LEAK

Next: End

POWER UP

KIT - FLOW SENSOR C/W TURBINE

Next: End

BOILER FIRES WITH NO DEMAND

KNOB - WHITE / GREY - POTENTIOMETERS

Next: End

POOR FLOW RATE

PACK - DHW

Next: End

POWER UP - FIRING NO DEMAND

Next: End

FOR TYPE DIAG PROCEDURE

Z DIRECTION

Next: End

FAN DOES NOT RUN QADAI

KIT - FLOW SENSOR C/W TURBINE

Next: End

FAN RUNS DHW DEMAND

KNOB - WHITE / GREY - POTENTIOMETERS

Next: End

DHW POT FAULTY

KIT - CUI BOARD

Next: End

FAN RUNS DHW

THERMISTOR - NO FLOW

Next: End

SENSOR TEMP RETURN FAN RUNS

HARNESS - WIRING - SELV

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

THERMISTOR - NO FLOW

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

CONTROL THERMISTOR (RETURN)

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

HARNESS - WIRING - MAINS

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

LEAD - IGNITION

Next: End

BURNER DOES NOT IGNITE

KIT - SIPHON TRAP

Next: End

VOLTAGE TO GAS VALVE

KIT - PCB L10 - PRIMARY

Next: End

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

HARNESS - WIRING - MAINS

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

BURNER DOES NOT IGNITE

INJECTOR ASSEMBLY

Next: End

BURNER DOES NOT IGNITE

KIT - BURNER

Next: End

BURNER DOES NOT IGNITE

KIT - HEAT ENGINE

Next: End

SPARK BUT NOT LIGHTING

FLUE

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

GAS INLET PRESSURE

Next: End

BURNERIGNITES

HARNESS - DETECTION LEAD

Next: End

BURNER IGNITES

ELECTRODE - DETECTION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

KIT - BURNER

Next: End

DOES NOT ESTABLISH

ELECTRODE - IGNITION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

FLUE

Next: End

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

KIT - SIPHON TRAP

Next: End

BURNER DOES NOT IGNITE - BAFFLES

GAS INLET PRESSURE

Next: End

BURNER BAFFLES OR NOISY

INJECTOR ASSEMBLY

Next: End

NEW MODELBLOCKED OR DAMAGED

FLUE

Next: End

MECHANICAL PHYSICAL OPERATION

KIT - FAN

Next: End

NEW MODEL FLUEWAYS

KIT - HEAT ENGINE

Next: End

IGNITES BUT BAFFLES OR NOISY

KIT - BURNER

Next: End

DHW NOISY

INTERNAL BYPASS

Next: End

DHW COOL RADS COOL

KIT - HEAT ENGINE

Next: End

DHW OPERATION BOILER NOISY

THERMISTOR - NO FLOW

Next: End

DHW OPERATION BOILER NOISY

CONTROL THERMISTOR (RETURN)

Next: End

DHW OPERATION BOILER NOISY

KIT - PUMP HEAD

Next: End

DHW RUNS HOT COLD

INTERNAL BYPASS

Next: End

NOT RESPONDING TO CH 4

KIT - CUI BOARD

Next: End

CH UP TO TEMP RADS COLD

Next: End

CH UP TEMP RADS COLD

PACK - CH FLOW / PACK - RETURN CH

Next: End

RADS COLD BOILER HOT

KIT - BODY - DIVERTER VALVE C/W PADDLE

Next: End

RADS COLD BOILER HOT

KIT - PCB L10 - PRIMARY

Next: End

RADS COLD BOILER HOT

HARNESS - WIRING - MAINS

Next: End

BLANK FOR L1 FAULT CODE 2

Z DIRECTION

Next: End

PREHEAT SATISFACTORY4

KIT - PCB L10 - PRIMARY

Next: End

TO DIVERTER - RADS NOT POOR HOT WATER2

HARNESS - WIRING - MAINS

Next: End

RADS COLD BOILER HOT 2

KIT - PCB L10 - PRIMARY

Next: End

RADS COLD BOILER HOT2

HARNESS - WIRING - MAINS

Next: End

FAULT CODE L3

KIT - BODY - DIVERTER VALVE C/W PADDLE

Next: End

NO PUMP AT START UP2 L1

KIT - PCB L10 - PRIMARY

Next: End

L1

HARNESS (MAIN) - ERP PUMP HARNESS

Next: End

NO PUMP AT STATR UP2 L1

HARNESS - WIRING - MAINS

Next: End

FO-L3 - NO FLOW FAULT - STICKING

KIT - PUMP HEAD

Next: End

FAULT CODE L3

KIT - HEAT ENGINE

Next: End

TO LWPS F1 - LOW WATER FAULT

HARNESS - WIRING - SELV

Next: End

F1 - LOW WATER FAULT

SWITCH - PRESSURE - WATER

Next: End

F3 - NEUTRAL FAULT

HARNESS - WIRING - MAINS

Next: End

F2 NO CONTROL VOLTAGE

KIT - PCB L10 - PRIMARY

Next: End

F3 FAN CONTROL

HARNESS - WIRING - SELV

Next: End

F3 - FAN HARNESS

HARNESS - WIRING - MAINS

Next: End

F6

OUTDOOR SENSOR

Next: End

F9

Z DIRECTION

Next: End

STUCK ON STARTUP

KIT - PCB L10 - PRIMARY

Next: End

PUMP RUNS

REGULATOR - FLOW

Next: End

FURTHER INVESTIGATION FUSE F1ERP PUMP

KIT - PUMP HEAD

Next: End

FURTHER INVESTIGATION FUSE F1ERP PUMP

KIT - FAN

Next: End

FURTHER INVESTIGATION FUSE F1ERP PUMP

UNIT - IGNITOR

Next: End

FURTHER INVESTIGATION FUSE F1

KIT - PUMP HEAD

Next: End

FURTHER INVESTIGATION FUSE F1

KIT - FAN

Next: End

FURTHER INVESTIGATION FUSE F1

UNIT - IGNITOR

Next: End

F6 FAN RUNS DHW DEMAND - NO FAN

KIT - PCB L10 - PRIMARY

Next: End

NOT RESPONDING TO CH 1

KIT - PCB L10 - PRIMARY

Next: End

OPERATION CH RADIATORS COOL

OUTDOOR SENSOR

Next: End

NO VOLTAGE TO DIVERTER (QADAI) CH

KIT - PCB L10 - PRIMARY

Next: End

TO GASVALVE - FURTHER INVESTIGATION FUSE F1

HARNESS - WIRING - MAINS

Next: End

TO GASVALVE - FURTHER INVESTIGATION FUSE F1ERP PUMP

HARNESS - WIRING - MAINS

Next: End

FAN RUNS DHW DEMAND - PUMP RUNNING CONTINUALLY (QADAI)

KIT - PCB L10 - PRIMARY

Next: End

TO DIVERTER - FURTHER INVESTIGATION FUSE F1

HARNESS - WIRING - MAINS

Next: End

TO DIVERTER - FURTHER INVESTIGATION FUSE F1ERP PUMP

HARNESS - WIRING - MAINS

Next: End

DIVERTER VALVE REFIITING

Z DIRECTION

Next: End

FURTHER INVESTIGATION FUSE ERP PUMP

KIT - PUMP HEAD

Next: End

DHW COLD RADS COLD

INTERNAL BYPASS

Next: End

L1 L3

INTERNAL BYPASS

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

INJECTOR ASSEMBLY

Next: End

RESTICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - SIPHON TRAP

Next: End

LOW SYSTEM TEMP POTOPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - CUI BOARD

Next: End

MECHANICAL OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - FAN

Next: End

GAS VALVE FILTER RESTRICTED

KIT - GAS VALVE

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

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

INJECTOR ASSEMBLY

Next: End

RESTICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - SIPHON TRAP

Next: End

LOW SYSTEM TEMP POTOPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - CUI BOARD

Next: End

MECHANICAL OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - FAN

Next: End

GAS VALVE FILTER RESTRICTED LPG

KIT - GAS VALVE

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

DHW COOL RADS COOL LPG

EXTERNAL HOT WATER FAULT

Next: End

FAULT CODE IN TREE 2

Z DIRECTION

Next: End

F2 BURNERIGNITES

HARNESS - DETECTION LEAD

Next: End

L6 BURNERIGNITES

HARNESS - DETECTION LEAD

Next: End

DHW TOO HOT

KNOB - WHITE / GREY - POTENTIOMETERS

Next: End

NO CH DEMAND 1

PLUG - TIMER LINK

Next: End

NOT RESPONDING TO CH 8

KIT - CUI BOARD

Next: End

NO CH DEMAND 1

INTERNAL TIMER

Next: End

NOT RESPONDING TO CH 3

KIT - CUI BOARD

Next: End

REACTS TO CH DEMAND

OUTDOOR SENSOR

Next: End

UP TO TEMP RADS COLD

INTERNAL BYPASS

Next: End

EXTERNAL FROST PROTECT 2

EXTERNAL FROST PROTECT

Next: End

ON WITH NO DEMAND - FROST

THERMISTOR - NO FLOW

Next: End

FIRING NO DEMAND

CONTROL THERMISTOR (RETURN)

Next: End

BLANK FOR XSOL MODEL VERSION

Z DIRECTION

Next: End

UNDER PRESSURE

KIT - EXPANSION VESSEL

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

GAS INLET PRESSURE

Next: End

HOT WATER CYCLING

CONTROL THERMISTOR (RETURN)

Next: End

TEMPERATURE CONTROL DHW

KIT - CUI BOARD

Next: End

BLOCKED PREHEAT SAT3

KIT - PLATE HEAT EXCHANGER

Next: End

HOT WATER CYCLING

THERMISTOR - NO FLOW

Next: End

NO OVERRUNS

KIT - PCB L10 - PRIMARY

Next: End

HOT WATER TOO HOT

CONTROL THERMISTOR (RETURN)

Next: End

HOT WATER TOO HOT

THERMISTOR - NO FLOW

Next: End

PREHEAT SATISFACTORY3

MOTOR DIVERTER VALVE

Next: End

TO FLOW SENSOR F4 - FLOW SENSOR FAULT

HARNESS - WIRING - SELV

Next: End

F4 - FLOW SENSOR FAULT

KIT - PCB L10 - PRIMARY

Next: End

TO RETURN SENSOR F5 - RETURN SENSOR FAULT

HARNESS - WIRING - SELV

Next: End

F5 - RETURN SENSOR FAULT

KIT - PCB L10 - PRIMARY

Next: End

C2 BCC ERROR

Z DIRECTION

Next: End

CH OPERATION NOISEY

Next: End

CH OPERATION NOISY

KIT - HEAT ENGINE

Next: End

LETBY PREHEAT3

KIT - BODY - DIVERTER VALVE C/W PADDLE

Next: End

FALSE LOW VOLTAGE

KIT - PCB L10 - PRIMARY

Next: End

L5 - RESTART FAULT CODES

Z DIRECTION

Next: End

FAULT CODE FA

HARNESS - WIRING - SELV

Next: End

FAULT CODE FA - FLOW SENSOR

HARNESS - WIRING - SELV

Next: End

POOR FLOW - RESTRICTED

KIT - PLATE HEAT EXCHANGER

Next: End

DHW COOL RADS COOL

EXTERNAL HOT WATER FAULT

Next: End

FAULT CODE FA

KIT - PCB L10 - PRIMARY

Next: End

POTENTIOMETER TEMP CONTROL CH OP BOILER NOISY 2

KIT - CUI BOARD

Next: End

FAN DOES NOT RUN

KIT - FLOW SENSOR C/W TURBINE

Next: End

F2 FAULT CODE

KIT - PCB L10 - PRIMARY

Next: End

BLANK FOR L6 FAULT CODE RESET

Z DIRECTION

Next: End

STOPPING PRESEQ BREAKING

Z DIRECTION

Next: End

DIVERTER VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

DIVERTER RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN SPEED CONTROL VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

NO MAINS TO FAN AT START UP QADAI

KIT - PCB L10 - PRIMARY

Next: End

ELECTRICAL OVER 15V ON N QADAI

KIT - FAN

Next: End

FAN RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

DHW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

RETURN THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION 2

Z DIRECTION

Next: End

BLANK FOR DIAGNOSICS LITE

Z DIRECTION

Next: End

DHW FLOW TURBINE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP RUNS DHW DEMAND ERP PUMP

KIT - PUMP HEAD

Next: End

START- UP2

KIT - PUMP HEAD

Next: End

ERP PUMP RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY

KIT - CUI BOARD

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 L10 - PRIMARY

Next: End

INTEGRAL FUSE FATIGUED

KIT - PCB L10 - PRIMARY

Next: End

OBSERVATION DISPLAY AND SELF CHECK - NO DISPLAY PARTIAL DISPLAY

KIT - CUI BOARD

Next: End

NO MAINS TO FAN AT START UP

KIT - PCB L10 - PRIMARY

Next: End

ELECTRICAL OVER 15V ON N

KIT - FAN

Next: End

NO FAN AT START UP

KIT - FAN

Next: End

POWER UP - PUMP DOES NOT RUN ERP PUMP

KIT - PUMP HEAD

Next: End

POWER UP - PUMP DOES NOT RUN START- UP2

KIT - PUMP HEAD

Next: End

POWER UP - FIRING UP WITH NO DHW DEMAND

KIT - PCB L10 - PRIMARY

Next: End

ON WITH NO DEMAND - PREHEAT

KIT - PCB L10 - PRIMARY

Next: End

FAN DOES NOT RUN DHW

KIT - PCB L10 - PRIMARY

Next: End

SENSOR PRIMARY FAN RUNS

HARNESS - WIRING - SELV

Next: End

FAN RUNS DHW

CONTROL THERMISTOR (RETURN)

Next: End

IGNORING DHW DEMAND

KIT - PCB L10 - PRIMARY

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

KIT - PCB L10 - PRIMARY

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

UNIT - IGNITOR

Next: End

POOR SUPPLY

GAS INLET PRESSURE

Next: End

NOT OPENING - MECHANICAL

KIT - GAS VALVE

Next: End

SPARK BUT NOT LIGHTING

KIT - GAS VALVE

Next: End

BURNER DOES NOT IGNITELEAKING POC

KIT - REPLACEMENT - SUMP COVER

Next: End

BURNER DOES NOT IGNITELEAKING POC

MANIFOLD - FLUE

Next: End

SPARKING BUT NOT LIGHTING

ELECTRODE - IGNITION

Next: End

SPARK BUT NOT LIGHTING

ELECTRODE - IGNITION

Next: End

BURNER DOES NOT IGNITE

KIT - GAS VALVE

Next: End

BURNER IGNITES AND ESTABLISHES - FLAME SENSE

HARNESS - WIRING - MAINS

Next: End

FLAME SENSE BURNER IGNITES DOES NOT ESTABLISH

KIT - PCB L10 - PRIMARY

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

OPERATION DHW - DHW COOL RADS COOL

KIT - PRESSURE GAUGE

Next: End

OPERATION DHW - DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

DHW NOISY

KIT - PRESSURE GAUGE

Next: End

DHW NOISY

SYSTEM PRESSURE

Next: End

DHW NOISY KETTLING

KIT - PLATE HEAT EXCHANGER

Next: End

DHW RUNS HOT COLD

KIT - PRESSURE GAUGE

Next: End

DHW RUNS HOT COLD

SYSTEM PRESSURE

Next: End

DHW NOISY KETTLING

KIT - HEAT ENGINE

Next: End

HOT WATER CYCLING

KIT - PLATE HEAT EXCHANGER

Next: End

CH NOISY

KIT - PRESSURE GAUGE

Next: End

CH NOISY

SYSTEM PRESSURE

Next: End

CH UP TO TEMP RADS COLD

KIT - PRESSURE GAUGE

Next: End

CH UP TO TEMP RADS COLD

SYSTEM PRESSURE

Next: End

RADS COLD BOILER HOT

MOTOR DIVERTER VALVE

Next: End

BLANK FOR L1 FAULT CODE

Z DIRECTION

Next: End

PREHEAT SATISFACTORY4

MOTOR DIVERTER VALVE

Next: End

RADS COLD BOILER HOT2

MOTOR DIVERTER VALVE

Next: End

FAULT CODE L1 ERP

KIT - PUMP HEAD

Next: End

START- UP2 L1

KIT - PUMP HEAD

Next: End

ALL CHECKS OK RETEST MODEL

OVERHEAT NO FAULT FOUND

Next: End

LEAKING POC

KIT - REPLACEMENT - SUMP COVER

Next: End

F1 - LOW WATER FAULT

KIT - PCB L10 - PRIMARY

Next: End

F1 - LOW WATER FAULT

SWITCH - PRESSURE - WATER

Next: End

F2 NO MAINS TO FAN

KIT - PCB L10 - PRIMARY

Next: End

F2 OVER 15V ON N

KIT - FAN

Next: End

F2 NO FAN AT START UP

KIT - FAN

Next: End

F6 - OUTDOOR SENSOR

KIT - PCB L10 - PRIMARY

Next: End

F9

KIT - PCB L10 - PRIMARY

Next: End

LEAKING POC L1 L3

MANIFOLD - FLUE

Next: End

TO PUMP - FURTHER INVESTIGATION FUSE F1ERP PUMP

HARNESS - WIRING - MAINS

Next: End

TO FAN - FURTHER INVESTIGATION FUSE F1ERP PUMP

HARNESS - WIRING - MAINS

Next: End

FURTHER INVESTIGATION FUSE F1ERP PUMP

KIT - PCB L10 - PRIMARY

Next: End

TO SPARK GEN - FURTHER INVESTIGATION FUSE F1ERP PUMP

HARNESS - WIRING - MAINS

Next: End

TO PUMP - FURTHER INVESTIGATION FUSE F1

HARNESS - WIRING - MAINS

Next: End

TO FAN - FURTHER INVESTIGATION FUSE F1

HARNESS - WIRING - MAINS

Next: End

FURTHER INVESTIGATION FUSE F1

KIT - PCB L10 - PRIMARY

Next: End

TO SPARK GEN - FURTHER INVESTIGATION FUSE F1

HARNESS - WIRING - MAINS

Next: End

OPERATION CH RADIATORS COOL

KIT - PCB L10 - PRIMARY

Next: End

DIVERTER VOLTAGE SATISFACTORY CH

RESULT AS EXPECTED

Next: End

FURTHER INVESTIGATION FUSE F1

KIT - GAS VALVE

Next: End

FURTHER INVESTIGATION FUSE F1ERP PUMP

KIT - GAS VALVE

Next: End

STOPPING PRESEQ BREAKING 2

Z DIRECTION

Next: End

PUMP VOLTAGE (LV)

RESULT AS EXPECTED

Next: End

FURTHER INVESTIGATION FUSE F1

MOTOR DIVERTER VALVE

Next: End

FURTHER INVESTIGATION FUSE F1ERP PUMP

MOTOR DIVERTER VALVE

Next: End

FUSE INVESTIGATION

HARNESS (MAIN) - ERP PUMP HARNESS

Next: End

DIVERTER REFITTING 2

Z DIRECTION

Next: End

DHW COOL RADS COOL

KIT - PLATE HEAT EXCHANGER

Next: End

FAULT CODE L3

KIT - PLATE HEAT EXCHANGER

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - SIPHON TRAP

Next: End

DHW COOL RADS COOL

KIT - PCB L10 - PRIMARY

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - SIPHON TRAP

Next: End

DHW COOL RADS COOL LPG

KIT - PCB L10 - PRIMARY

Next: End

FAULT CODE IN TREE 1

Z DIRECTION

Next: End

F2 BURNER IGNITES AND ESTABLISHES - FLAME SENSE

HARNESS - WIRING - MAINS

Next: End

L6 BURNER IGNITES AND ESTABLISHES - FLAME SENSE

HARNESS - WIRING - MAINS

Next: End

FAN RUNS CH DEMAND 1

Next: End

NO CH 2

HARNESS INTERNAL TIMER (X1A)

Next: End

NOT RESPONDING TO HEATING 2

KIT - PCB L10 - PRIMARY

Next: End

NO CH DEMAND

Next: End

DOES NOT RECOGNISE CH DEMAND

HARNESS INTERNAL TIMER (X1A)

Next: End

IGNORING CH DEMAND - INTERNAL TIMER

KIT - PCB L10 - PRIMARY

Next: End

CH DEMAND OUTDOOR SENSOR

Z DIRECTION

Next: End

CH OPERATION BOILER UP TO TEMP RADS COLD

Next: End

UP TO TEMP RADS COLD - OPENING BYPASS

Next: End

ON WITH NO DEMAND - FROST

KIT - PCB L10 - PRIMARY

Next: End

POWER UP - FIRING WITH NO FROST DEMAND

KIT - PCB L10 - PRIMARY

Next: End

EXPANSION CONNECTION

KIT - PIPE - EXPANSION VESSEL

Next: End

TO RETURN SENSOR - HOT WATER CYCLING

HARNESS - WIRING - SELV

Next: End

TO HEATING SENSOR - HOT WATER CYCLING

HARNESS - WIRING - SELV

Next: End

DHW TOO HOT

KIT - PCB L10 - PRIMARY

Next: End

MIXING - HOT WATER CYCLING

EXTERNAL HOT WATER FAULT

Next: End

NO DISPLAY SEEN

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY OPERATES

Next: p108

DIFFERENTIAL OK

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW RETURN (P=DIF NOK NOISY NSD)

Next: !p1325

TEMP DIFF CORRECT LOCAL BOILING

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW RETURN (P=DIF NOK NOISY NSD)

Next: !p1327

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3648

DHW COOL RADS COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3182

DHW COOL RADS HOT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p199

DHW NOISY KETTLING

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3245

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3289

DIAGNOSTICS LITE OPTION

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2628

QUICK ACCESS DATA AND INFORMATION OPTION

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2630

HEADER FOR QUICK ACCESS DATA RETURN THERMISTOR

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2634

HEADER FOR QUICK ACCESS DATA FLOW THERMISTOR

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2636

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2638

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2640

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2642

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2644

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2646

HEADER FOR QUICK ACCESS DATA FAN VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2648

HEADER FOR QUICK ACCESS DATA FAN SPEED CONTROL

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2650

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2654

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2656

HEADER FOR QUICK ACCESS DATA DIVERTER RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2658

HEADER FOR QUICK ACCESS DATA DIVERTER VOLTAGE DHW

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2660

NEEDED OR PRESEQ MESSES UP DIVERTER VOLTAGE FOR SOME REASON

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: !p2662

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p2678

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p2680

HEADER FOR DHW FLOW SWITCH

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2706

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE (ERP)

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p2882

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

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY OPERATES

Next: p2910

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK AND STANDBY

Next: p2916

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p2920

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p2922

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK AND STANDBY

Next: p2932

BOILER FIRES OR PUMP CONTINUES TO RUN WITH NO HEATING OR HOT WATER DEMAND

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK AND STANDBY

Next: p2967

F SHOWING - FROST PROTECTION

CHARACTERISTIC TEST FROM OBSERVATION WHICH DEMAND IS SHOWING

Next: p2985

d SHOWING - HOT WATER DEMAND

CHARACTERISTIC TEST FROM OBSERVATION WHICH DEMAND IS SHOWING

Next: p2990

P SHOWING - PREHEAT

CHARACTERISTIC TEST FROM OBSERVATION WHICH DEMAND IS SHOWING

Next: p2997

DISPLAY CHANGES TO d BUT FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP & FAN RUNS DHW DEMAND

Next: p3081

BURNER DOES NOT IGNITE - IGNITION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES DHW DEMAND

Next: p3091

INLET PRESSURE DOES NOT CHANGE

CHARACTERISTIC TEST FROM PRESSURE GAS INLET (BLIP TEST)

Next: p3109

INLET PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET (BLIP TEST)

Next: !p3111

SUMP UNSATISFACTORY

Next: !p3129

FLUE MANIFOLD UNSATISFACTORY

Next: !p3131

SPARK ELECTRODE IN POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION ELECTRODE SPARK GAP

Next: !p3139

SPARK GAP INCORRECT

CHARACTERISTIC TEST FROM INSPECTION ELECTRODE SPARK GAP

Next: !p3141

BURNER IGNITES BUT DOES NOT ESTABLISH - RECTIFICATION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES DHW DEMAND

Next: p3145

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY - COMBUSTION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES DHW DEMAND

Next: p3161

FLUE MANIFOLD UNSATISFACTORY

Next: !p3175

SUMP UNSATISFACTORY

Next: !p3177

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3242

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3244

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3283

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3285

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3304

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3306

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3337

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3339

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3361

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3363

DIVERTER VALVE DOES NOT GO TO HEATING POSITION

CHARACTERISTIC TEST FROM INSPECTION DIVERTER VALVE HEAD OPERATION

Next: p3423

DIVERTER VALVE DOES NOT GO TO HOT WATER POSITION

CHARACTERISTIC TEST FROM INSPECTION DIVERTER VALVE HEAD OPERATION

Next: p3425

SUMP UNSATISFACTORY

Next: !p3455

FLUE MANIFOLD UNSATISFACTORY

Next: !p3503

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p3469

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p3471

HEADER FOR QUICK ACESS DATA DIVERTER VOLTAGE CH

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p3559

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE (LOW VOLTAGE)

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p3572

NEEDED OR PRESEQ MESSES UP DIVERTER VOLTAGE FOR SOME REASON

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: !p3569

GAS RATE LOW

Next: p3599

UNABLE TO GAS RATE (EG LPG)

Next: p3598

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK AND STANDBY

Next: p3639

BOILER NOISY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p3323

BOILER REACHES TEMPERATURE AND/OR SHUTS DOWN RADS COLD OR COOL

CHARACTERISTIC TEST FROM OPERATION CH

Next: p3340

BOILER TEMPERATURE AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p2464

SYSTEM PRESSURE RISE EXCESSIVE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p645

DISPLAY CHANGES TO d BUT PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP & FAN RUNS DHW DEMAND

Next: p981

DISPLAY SHOWS 0 AND NEITHER THE FAN NOR THE PUMP RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP & FAN RUNS DHW DEMAND

Next: p3065

03/01/2024 09:29:55 2312_1_50_1 22/02/2024 11:27:17

16/02/2024 14:58:57

Next: End

INSPECTION SYSTEM PRESSURE

Next: p1942, !f1950

RESISTANCE SENSOR FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p1150, f1147

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: !p1148, !f1149

RESISTANCE SENSOR RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p1155, f1152

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p1153, !f1154

RESISTANCE DETECTION LEAD AND HARNESS

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

Next: p1193, f3645

INFORMATION - RECENTLY REPLACED PCB

Next: !p1211, !f1208

VOLTAGE MAINS POWER SUPPLY - F7 FAULT CODE

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

Next: !p1452, !f1453

POWER OFF RESET BOILER

PREHEAT OFF
WAIT APPROXIMATELY 15 SECONDS

Next: !p1457, !f1456

PUMP LIMPET TEST

Next: p1464, !f1466

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p1468, !f1469

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: !p1478, !f1479

TEMPERATURE DIFFERENTIAL FLOW RETURN (CH)

CH TEMPERATURE CONTROL SET TO MAX

Next: p3589, !f3308

OBSERVATION BOILER RESET - OVERHEAT

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p1908, f2494

OBSERVATION PUMP TYPE

Next: p3529, f3504

VOLTAGE TO FLOW SWITCH TURBINE

Next: p2045, !f2046

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2096, !f2097

VOLTAGE TO DIVERTER VALVE (DHW)

{ALLDEMANDOFF}
SE

Next: p1018, !f1021

INSPECTION SELECTOR SWITCH KNOB

Next: p3657, !f2463

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p2495, !f2496

RESISTANCE PUMP HARNESS (ERP)

DISCONNECT MAINS VOL

Next: !p2731, !f2732

INSPECTION DHW ISOLATION VALVE

Next: p1489, !f30

VOLTAGE MAINS POWER SUPPLY AT TERMINAL BLOCK

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

Next: p2892, f2893

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p2894, f2895

3AMP FUSE FAULTY

Next: !p2896, !f2897

PCB FUSE FAULTY

Next: !p2902, !f2903

INFORMATION INTEGRAL FUSE

Next: !p2906, !f2907

RESISTANCE PUMP HARNESS (ERP)

DISCONNECT MAINS VOL

Next: !p2937, !f2938

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: !p3084, !f3085

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p3087, !f3088

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: p3094, f3095

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p3096, !f3097

RESISTANCE HARNESS GAS VALVE

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

Next: !p3116, !f3117

RESISTANCE DETECTION LEAD

DISCONNECT FLAME SEN

Next: !p3150, !f3151

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p3310, !f3311

INSPECTION INTERNAL BYPASS

DRAIN BOILER PRIMARY CIRCUIT
TWIST AND LIFT / PRISE OUT INTERNAL BYPASS

Next: !p3317, !f3318

VOLTAGE DIVERTER VALVE (HEATING)

{ALLDEMANDOFF}
SE

Next: p3413, !f3414

VOLTAGE PUMP AT PCB

GAIN ACCESS TO PCB (

Next: p3438, !f3439

RESISTANCE PUMP HARNESS (ERP)

DISCONNECT MAINS VOL

Next: !p3442, !f3443

TEMPERATURE DIFFERENTIAL FLOW RETURN (CH)

CH TEMPERATURE CONTROL SET TO MAX

Next: p3592, !f3451

RESISTANCE LOW WATER PRESSURE SWITCH

DISCONNECT WIRES FROM LOW WATER PRESSURE SWITCH

Next: p3461, !f3462

VOLTAGE FAN (AT PCB)

SLIGHTLY MOVE CONNECTORS UNTIL PCB CONNECTION STRIPS
ARE EXPOSED FOR VOLTAGE MEASUREMENT

Next: p3467, ?3468, ?3470

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3482, !f3551

OBSERVATION RESET BOILER F9

Next: !p3493, !f3494

RESISTANCE PUMP AND HARNESS (ERP)

REMOVE CONNECTOR X1 FROM THE PCB

Next: p3505, f3506

RESISTANCE PUMP (ERP)

UNPLUG THE MAINS HARNESS (LEFT HAND SIDE) FROM THE PUMP

Next: !p3586, !f3587

RESISTANCE PUMP

UNPLUG THE HARNESS FROM THE SIDE OF THE PUMP AND REMOVE THE PUMPS ELECTRICAL COVER

Next: !p3511, !f3512

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p3515, !f3516

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p3577, !f3578

RESISTANCE HARNESS GAS VALVE

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

Next: !p3564, !f3565

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p3527, !f3528

RESISTANCE PUMP

UNPLUG THE HARNESS FROM THE SIDE OF THE PUMP AND REMOVE THE PUMPS ELECTRICAL COVER

Next: !p3532, !f3533

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p3536, !f3537

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p3575, !f3576

RESISTANCE HARNESS GAS VALVE

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

Next: !p3562, !f3563

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p3548, !f3549

INFORMATION DIVERTER VALVE REFITTING PROCEDURE

1. ENSURE TH

Next: !p3588, !f3582

INSPECTION CONDENSATE PIPE

Next: !p3604, !f3605

INSPECTION CONDENSATE PIPE

Next: !p3623, !f3624

RESISTANCE DETECTION LEAD

DISCONNECT FLAME SEN

Next: !p3643, !f3644

RESISTANCE DETECTION LEAD

DISCONNECT FLAME SEN

Next: !p3646, !f3647

OBSERVATION INTERNAL TIMER

Next: p3679, f3680

OBSERVATION BYPASS EXTERNAL CONTROLS

PLACE A WIRE LINK BE

Next: !p3681, f3682

RESISTANCE HARNESS X1 TO TERMINAL BLOCK - NO TIMER FITTED

REMOVE CONNECTOR X1 FROM THE PCB

Next: p3683, f3684

OBSERVATION INTERNAL TIMER BYPASS LINK FITTED

REMOVE BLANKING PANEL ON THE FRONT OF THE APPLIANCE

Next: !p3685, !f3686

RESISTANCE HARNESS X1 TO TERMINAL BLOCK

INTERNAL TIMER SWITCHED TO THE ON POSITION
REMOVE CONNECTOR X1 FROM THE PCB

Next: p3691, f3692

RESISTANCE INTERNAL TIMER

INTERNAL TIMER SWITCHED TO THE ON POSITION
REMOVE CONNECTIONS 3 AND 4 FROM THE INTERNAL TIMER

Next: !p3693, !f3694

INSPECTION INTERNAL BYPASS

DRAIN BOILER PRIMARY CIRCUIT
TWIST AND LIFT / PRISE OUT INTERNAL BYPASS

Next: !p3709, !f3710

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: !p787, !f848

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p784, !f785

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p1019, !f1261

OBSERVATION DOES FAN OR PUMP RUN

Next: p2886, f2891

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2478, !f1195

OPERATION CH (FOR HEAT EX DIAG)

PREHEAT OFF
CH TEMPERATURE CONTROL SET TO MAXIMUM

Next: p1303, f3309

INSPECTION CONDENSATE TRAP

REMOVE THE CONDENSATE TRAP FROM THE BOILER

Next: p3286, !f1320

TEMPERATURE DIFFERENTIAL HEATING FLOW AND RETURN

PREHEAT OFF
ATTACH TEMP PROBES TO THE FLOW AND RETURN PIPES AS CLOSE TO THE BOILER AS POSSIBLE

Next: p1323, ?1324, ?1326

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p1328, !f1329

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p2033, !f2036

INSPECTION DIVERTER VALVE HEATING POSITION

SELECTOR SWITCH SET TO CH/DHW
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: p3409, f3412

RESISTANCE SENSOR RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p1465, f1467

RESISTANCE SENSOR FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p1860, f1477

OBSERVATION COLD WATER SUPPLY

Next: p29, !f1498

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p1640, !f1641

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p1662, !f1643

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1646, !f1647

GAS RATE

Next: !p1708, ?3595, ?3597

HOT WATER FLOW AND RETURN TEMPERATURE DIFFERENTIAL

Next: p1645, f1689

INSPECTION SYSTEM PRESSURE

Next: p1952, !f1985

OBSERVATION SYSTEM PRESSURE RISE

LOCATE SYSTEM FILLING LOOP

Next: p3458, !f1951

OBSERVATION SYSTEM PRESSURE RISE

LOCATE SYSTEM FILLING LOOP

Next: p2742, !f1986

INSPECTION DIVERTER VALVE DHW POSITION

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: p234, f235

PUMP LIMPET TEST

Next: !p2034, !f2035

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p2039, !f2040

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p3319, !f2042

RESISTANCE HARNESS FLOW SWITCH

REMOVE CONNECTOR FOR DHW FLOW TURBINE
PULL CONNECTOR X8 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p2047, !f2048

RESISTANCE DETECTION LEAD AND HARNESS

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

Next: p2098, f3642

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2135, !f2147

INSPECTION BURNER

REMOVE THE BURNER

Next: p2150, !f2155

INSPECTION FLUE

Next: !p2104, !f2105

INSPECTION CONDENSATE TRAP

REMOVE THE CONDENSATE TRAP FROM THE BOILER

Next: p2141, !f2148

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p2171, !f2181

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p2165, !f2170

INSPECTION SPARK ELECTRODE

REMOVE THE BURNER FROM THE BOILER

Next: p2102, !f2169

INSPECTION GAS VALVE INLET FILTER

REMOVE THE GAS VALVE ASSEMBLY

Next: p2100, !f2182

INSPECTION DIVERTER VALVE SPINDLE

REMOVE DIVERTER VALVE ACTUATOR, TO REMOVE PULL HEAD TOWARDS GAS PIPE

Next: p240, !f241

INSPECTION DHW CONTROL KNOB

Next: p1639, !f2438

INSPECTION HEAT EXCHANGER DHW

MAINS WATER SUPPLY O

Next: !p1422, !f812

INSPECTION CH CONTROL KNOB

Next: p639, !f2474

TIGHTNESS TEST INSTALLATION

Next: p2479, !f2480

OBSERVATION FAULT CODE RESET (L6)

Next: !p2482, !f2484

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p3417, !f2498

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p2534, !f2600

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p3420, !f2601

DIAGNOSTICS LITE

DIAGNOSIS RELIES ON

Next: !p2701, !f2702

QUICK ACCESS DATA AND INFORMATION


THE TABLE BELOW

Next: !p2699, !f2700

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p2695, !f2703

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: !p2693, !f2694

VOLTAGE GAS VALVE AT PCB

GAIN ACCESS TO PCB (

Next: !p2691, !f2692

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p2689, !f2690

RESISTANCE PUMP

UNPLUG THE HARNESS FROM THE SIDE OF THE PUMP AND REMOVE THE PUMPS ELECTRICAL COVER

Next: !p2687, !f2688

VOLTAGE PUMP AT PCB

GAIN ACCESS TO PCB (

Next: !p2685, !f2686

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p2683, !f2684

VOLTAGE FAN (AT PCB)

SLIGHTLY MOVE CONNECTORS UNTIL PCB CONNECTION STRIPS
ARE EXPOSED FOR VOLTAGE MEASUREMENT

Next: !p2675, ?2677, ?2679

VOLTAGE FAN CONTROL

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

Next: !p2673, !f2674

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p2669, !f2670

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: !p2667, !f2668

RESISTANCE DIVERTER VALVE AND HARNESS (QADAI)

REMOVE X2 CONNECTOR FROM THE PCB

Next: !p2665, !f2666

VOLTAGE TO DIVERTER VALVE (DHW)

{ALLDEMANDOFF}
SE

Next: !p2663, !f2664

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2681, !f2682

VOLTAGE FROM HOT WATER FLOW TURBINE

PREHEAT OFF
GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)
RUN HOT WATER TAP AT 3 L/MIN

Next: !p2727, !f3064

OBSERVATION PUMP TYPE

Next: p2729, f2730

RESISTANCE PUMP HARNESS

GAIN ACCESS TO PCB
REMOVE CONNECTOR FROM PUMP

Next: !p2733, !f2734

INSPECTION ISOLATION VALVE FLOW AND RETURN

Next: p2782, !f2822

INSPECTION EXTERNAL BYPASS

Next: p2501, !f2823

RESISTANCE PUMP (ERP)

UNPLUG THE MAINS HARNESS (LEFT HAND SIDE) FROM THE PUMP

Next: !p2883, !f2884

VOLTAGE DISPLAY PCB

GAIN ACCESS TO PCB (

Next: p2887, !f2888

RESISTANCE HARNESS DISPLAY PCB

GAIN ACCESS TO PCB <

Next: !p2889, !f2890

VOLTAGE MAINS POWER SUPPLY AT PCB

GAIN ACCESS TO PCB (

Next: p2898, !f2899

RESISTANCE FUSE (F2) PCB

REMOVE FUSE FROM HOLDER

Next: p2900, f2901

INSPECTION REGULATOR / FILTER DHW INLET

ISOLATE AND DRAIN THE MAINS WATER SUPPLY
REMOVE REGULATOR / FILTER FROM CARTRIDGE ASSEMBLY

Next: !p1501, !f3502

RESISTANCE PCB INTEGRAL FUSE

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

Next: !p2904, f2905

VOLTAGE DISPLAY PCB

GAIN ACCESS TO PCB (

Next: p2911, !f2912

RESISTANCE HARNESS DISPLAY PCB

GAIN ACCESS TO PCB <

Next: !p2913, !f2914

VOLTAGE FAN (AT PCB)

SLIGHTLY MOVE CONNECTORS UNTIL PCB CONNECTION STRIPS
ARE EXPOSED FOR VOLTAGE MEASUREMENT

Next: p2917, ?2919, ?2921

VOLTAGE FAN CONTROL

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

Next: p2925, !f2926

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2923, !f2924

RESISTANCE HARNESS FAN CONTROL

REMOVE LOW VOLTAGE CONNECTOR FROM FAN

Next: p2927, !f2928

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2929, !f2930

VOLTAGE PUMP AT PCB START-UP

GAIN ACCESS TO PCB (

Next: p2933, !f2934

OBSERVATION PUMP TYPE

Next: p2935, f2936

RESISTANCE PUMP HARNESS

GAIN ACCESS TO PCB
REMOVE CONNECTOR FROM PUMP

Next: !p2939, !f2940

OBSERVATION WHICH DEMAND IS SHOWING

Next: p3007, ?2981, ?2983, ?2995

OBSERVATION AMBIENT TEMPERATURE

Next: p3720, !f2987

OBSERVATION ISOLATE DHW

TURN THE DHW ISOLATION VALVE OFF

Next: p2991, !f2992

OBSERVATION DISCONNECT FLOW TURBINE

UNPLUG ELECTRICAL CONNECTOR AT FLOW TURBINE AND MAKE SAFE

Next: !p2993, !f2994

INSPECTION PREHEAT KNOB

Next: !p2998, !f2999

VOLTAGE EXTERNAL CONTROLS (NO DEMAND)

GAIN ACCESS TO THE BOILERS MAIN TERMINAL STRIP
ENSURE NO DEMAND FOR CH

Next: p3712, !f3009

INSPECTION SELECTOR SWITCH KNOB

Next: p964, !f3076

RESISTANCE SELECTOR SWITCH

GAIN ACCESS TO THE CONTROL PCB
(THE MAIN PCB WILL NEED TO BE REMOVED)

Next: !p3079, !f3080

RESISTANCE SENSOR FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p3082, f3083

RESISTANCE SENSOR RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p3089, f3086

INSPECTION SPARK OUTPUT

REMOVE THE HT LEAD F

Next: p3092, f3093

INSPECTION CONDENSATE TRAP

REMOVE THE CONDENSATE TRAP FROM THE BOILER

Next: p3104, !f3105

RESISTANCE HARNESS SPARK GENERATOR

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

Next: p3100, !f3101

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: !p3098, !f3099

RESISTANCE IGNITION LEAD

DISCONNECT BOTH ENDS OF THE SPARK (HT) LEAD

Next: !p3102, !f3103

PRESSURE GAS INLET (BLIP TEST)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3106, ?3108, ?3110

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p3126, ?3128, ?3130

VOLTAGE GAS VALVE AT PCB

GAIN ACCESS TO PCB (

Next: p3112, !f3113

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p3114, f3115

INSPECTION FLUE

Next: p3118, !f3119

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p3120, !f3121

INSPECTION BURNER

REMOVE THE BURNER

Next: p3122, !f3123

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: !p3124, !f3125

INSPECTION FLUE

Next: p3132, !f3133

INSPECTION BURNER

REMOVE THE BURNER

Next: p3134, !f3135

INSPECTION ELECTRODE SPARK GAP

CAREFULLY REMOVE BURNER FROM BOILER

Next: p3136, ?3138, ?3140

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: !p3142, !f3143

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3146, !f3147

RESISTANCE DETECTION LEAD AND HARNESS

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

Next: p3148, f3149

INSPECTION DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p3152, !f3153

INSPECTION BURNER

REMOVE THE BURNER

Next: p3154, !f3155

INSPECTION SPARK ELECTRODE

REMOVE THE BURNER FROM THE BOILER

Next: p3156, !f3157

INSPECTION FLUE

Next: !p3158, !f3159

INSPECTION CONDENSATE TRAP

REMOVE THE CONDENSATE TRAP FROM THE BOILER

Next: p3162, !f3163

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3164, !f3165

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p3166, !f3167

INSPECTION FLUE

Next: p3168, !f3169

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p3170, !f3171

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p3172, ?3174, ?3176

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p3178, !f3179

INSPECTION BURNER

REMOVE THE BURNER

Next: !p3180, !f3181

INSPECTION SYSTEM PRESSURE AND RISE

Next: p2381, ?3241, ?3243

INSPECTION SYSTEM PRESSURE AND RISE

Next: p1302, ?3282, ?3284

INSPECTION INTERNAL BYPASS

DRAIN BOILER PRIMARY CIRCUIT
TWIST AND LIFT / PRISE OUT INTERNAL BYPASS

Next: !p3287, !f3288

INSPECTION SYSTEM PRESSURE AND RISE

Next: p770, ?3303, ?3305

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p3312, !f3313

PUMP LIMPET TEST

Next: !p3314, !f3315

RESISTANCE POTENTIOMETER - CH TEMPERATURE

REMOVE THE MAIN PCB TO GAIN ACCESS TO THE CONTROL PCB

Next: p3552, !f3321

INSPECTION SYSTEM PRESSURE AND RISE

Next: p1322, ?3336, ?3338

INSPECTION SYSTEM PRESSURE AND RISE

Next: p742, ?3360, ?3362

INSPECTION ISOLATION VALVE FLOW AND RETURN

Next: p3382, !f3401

INSPECTION EXTERNAL BYPASS

Next: p1428, !f3400

INSPECTION DIVERTER VALVE SPINDLE

REMOVE DIVERTER VALVE ACTUATOR, TO REMOVE PULL HEAD TOWARDS GAS PIPE

Next: p3703, !f3411

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p3415, !f3416

INFORMATION - RECENTLY REPLACED PCB

Next: !p3418, !f3419

INSPECTION DIVERTER VALVE HEAD OPERATION

SELECTOR SWITCH SET TO DHW/CH POSITION
TEMPERATURE CONTROLS SET TO MAX
PREHEAT OFF

Next: p3421, ?3422, ?3424

INSPECTION DIVERTER VALVE SPINDLE

REMOVE DIVERTER VALVE ACTUATOR, TO REMOVE PULL HEAD TOWARDS GAS PIPE

Next: p3434, !f3435

VOLTAGE DIVERTER VALVE (HEATING)

{ALLDEMANDOFF}
SE

Next: p3430, !f3431

VOLTAGE TO DIVERTER VALVE (DHW)

{ALLDEMANDOFF}
SE

Next: p3426, !f3427

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p3428, !f3429

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p3432, !f3433

OBSERVATION PUMP RUNS

Next: p3436, f3437

PUMP LIMPET TEST

Next: p3446, !f3447

OBSERVATION PUMP TYPE

Next: p3440, f3441

RESISTANCE PUMP HARNESS

GAIN ACCESS TO PCB
REMOVE CONNECTOR FROM PUMP

Next: !p3444, !f3445

HOT WATER FLOW AND RETURN TEMPERATURE DIFFERENTIAL

Next: p3448, f3449

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p3452, ?3454, ?3456

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

DISCONNECT X8 AT THE PCB

Next: !p3459, f3460

INSPECT LOW WATER PRESSURE SENSOR (BLOCKAGE)

ISOLATE BOILER FROM THE HEATING CIRCUIT AND DRAIN BOILER
REMOVE LOW WATER PRESSURE SENSOR

Next: !p3463, !f3464

VOLTAGE FAN CONTROL

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

Next: p3474, !f3475

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p3472, !f3473

RESISTANCE HARNESS FAN CONTROL

REMOVE LOW VOLTAGE CONNECTOR FROM FAN

Next: p3476, !f3477

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p3478, !f3479

OBSERVATION DISCONNECT OUTDOOR SENSOR

DISCONNECT X7 PLUG FOR OUTDOOR SENSOR

Next: !p3489, !f3490

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR X1 FROM THE PCB

Next: p3509, f3510

RESISTANCE FAN AND HARNESS (MAINS POWER)

REMOVE CONNECTOR X3 FROM THE PCB

Next: p3513, f3514

RESISTANCE HARNESS AND DIVERTER VALVE

REMOVE X2 CONNECTOR FROM THE PCB

Next: p3517, f3518

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p3521, f3522

RESISTANCE HARNESS AND SPARK GENERATOR

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p3525, f3526

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR X1 FROM THE PCB

Next: p3530, f3531

RESISTANCE FAN AND HARNESS (MAINS POWER)

REMOVE CONNECTOR X3 FROM THE PCB

Next: p3534, f3535

RESISTANCE HARNESS AND DIVERTER VALVE

REMOVE X2 CONNECTOR FROM THE PCB

Next: p3538, f3539

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p3542, f3543

RESISTANCE HARNESS AND SPARK GENERATOR

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p3546, f3547

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3554, !f3553

OBSERVATION DISCONNECT OUTDOOR SENSOR (CH OP)

DISCONNECT X7 PLUG FOR OUTDOOR SENSOR

Next: !p3555, !f3556

VOLTAGE DIVERTER VALVE (HEATING)

{ALLDEMANDOFF}
SE

Next: !p3560, !f3561

VOLTAGE PUMP SPEED CONTROL

DISCONNECT PUMP SPEE

Next: !p3573, !f3574

INSPECTION INTERNAL BYPASS

DRAIN BOILER PRIMARY CIRCUIT
TWIST AND LIFT / PRISE OUT INTERNAL BYPASS

Next: !p3590, !f3591

INSPECTION INTERNAL BYPASS

DRAIN BOILER PRIMARY CIRCUIT
TWIST AND LIFT / PRISE OUT INTERNAL BYPASS

Next: !p3593, !f3594

TEMPERATURE DIFFERENCE TO TAP - EXTERNAL MIXING

Next: p3618, !f3637

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p3600, !f3601

INSPECTION CONDENSATE TRAP

REMOVE THE CONDENSATE TRAP FROM THE BOILER

Next: p3602, f3603

RESISTANCE POTENTIOMETER - DHW TEMPERATURE

GAIN ACCESS TO CONTROL PCB

Next: p3606, !f3607

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p3608, !f3609

INSPECTION GAS VALVE INLET FILTER

REMOVE THE GAS VALVE ASSEMBLY

Next: p3610, !f3611

INSPECTION BURNER

REMOVE THE BURNER

Next: p3612, !f3613

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p3614, !f3615

INSPECTION FLUE

Next: !p3616, !f3617

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p3619, !f3620

INSPECTION CONDENSATE TRAP

REMOVE THE CONDENSATE TRAP FROM THE BOILER

Next: p3621, f3622

RESISTANCE POTENTIOMETER - DHW TEMPERATURE

GAIN ACCESS TO CONTROL PCB

Next: p3625, !f3626

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p3627, !f3628

INSPECTION GAS VALVE INLET FILTER

REMOVE THE GAS VALVE ASSEMBLY

Next: p3629, !f3630

INSPECTION BURNER

REMOVE THE BURNER

Next: p3631, !f3632

INSPECTION HEAT EXCHANGER (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p3633, !f3634

INSPECTION FLUE

Next: !p3635, !f3636

FAULT CODES

Next: !p3640, !f3641

INSPECTION DHW CONTROL KNOB

Next: p571, !f3656

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3697, f3678

OBSERVATION BYPASS EXTERNAL CONTROLS

PLACE A WIRE LINK BE

Next: !p3689, f3690

RESISTANCE SELECTOR SWITCH

GAIN ACCESS TO THE CONTROL PCB
(THE MAIN PCB WILL NEED TO BE REMOVED)

Next: !p3687, !f3688

RESISTANCE SELECTOR SWITCH

GAIN ACCESS TO THE CONTROL PCB
(THE MAIN PCB WILL NEED TO BE REMOVED)

Next: !p3695, !f3696

OBSERVATION DISCONNECT OUTDOOR SENSOR (CH DEMAND)

DISCONNECT X7 PLUG FOR OUTDOOR SENSOR

Next: !p3698, !f3699

OBSERVATION TEMPERATURE FLOW AND RETURN

CH TEMPERATURE CONTR

Next: !p3704, f3708

VOLTAGE EXTERNAL FROST STAT

{ALLDEMANDOFF}
PREHEAT OFF
GAIN ACCESS TO THE BOILERS MAIN TERMINAL STRIP

Next: !p3719, !f3714

RESISTANCE SENSOR FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p3721, !f3722

RESISTANCE SENSOR RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p3723, !f3724

RESISTANCE SENSOR FLOW

REMOVE THE ELECTRICA

Next: p838, !f998

RESISTANCE POTENTIOMETER - DHW TEMPERATURE

GAIN ACCESS TO CONTROL PCB

Next: !p793, !f792

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p660, !f661

EXPANSION VESSEL PRESSURE

SYSTEM PRESSURE DISCHARGED

Next: !p646, !f647

GAS RATE

Next: p2038, !f2043

PUMP LIMPET TEST

Next: p3364, !f1262

HOT WATER FLOW AND RETURN TEMPERATURE DIFFERENTIAL

Next: p771, f3316

RESISTANCE SENSOR FLOW AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: p772, f779

RESISTANCE SENSOR RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p994, f783

RESISTANCE SENSOR RETURN

DISCONNECT PLUG FROM RETURN SENSOR

Next: p572, !f997

VOLTAGE FROM HOT WATER FLOW TURBINE

PREHEAT OFF
GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)
RUN HOT WATER TAP AT 3 L/MIN

Next: p3078, f2044

VOLTAGE PUMP AT PCB

GAIN ACCESS TO PCB (

Next: p2728, !f1201

System Information

  • Total Tests: 755
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control