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:

4101911 BRITISH GAS 330+ (OPEN VENTED SYSTEM)

GLOBALLY REPLACED

Next: &1, *

DIAGNOSTIC CODES (NULL)

Next: &nff, f1020

STATUS CODES (NULL)

Next: &nff, f1030

FAULT CODES (NULL)

Next: &nff, f1341

NO FAULT FOUND

Next: nff

41 019 11 BRITISH GAS 330+ (OPEN VENTED SYSTEM)

Next: &3036, !f3

OBSERVATION BOILER STANDBY

ENSURE NO DEMANDS

Next: &595, ?151, ?155, ?2519

FAN RUNS

WAIT 60 SECONDS BEFO

Next: &2314, ?273, ?275, ?277

PUMP RUNS

MAKE SURE ALL STATS ARE TURNED UP
BOILER CH TEMPERATURE SET TO MAX

Next: &206, f596

BOILER OPERATION

Next: &2485, ?638, ?640, ?642, ?644

DHW DEMAND

Next: &2498, f956

F5 - OVERHEAT

Next: &nff, f1085

F3 FAN FAULT

INTENTIONALLY BLANK, HEADER FOR FAULT CODE

Next: &nff, f1176

F6 FLOW THERMISTOR

Next: &nff, f1190

F10 RETURN THERMISTOR

Next: &nff, f1210

F11 FLOW AND OR RETURN THERMISTOR

Next: &nff, f1226

F13 PCB MEMORY OR SENSING FAULT

Next: &nff, f1247

F15 PCB EBUS ERROR

Next: &nff, f1285

F14 GAS VALVE

Next: &nff, f1264

F43 GENERIC ERROR

Next: &nff, f1320

F22 LOW WATER

Next: &nff, f1288

F77 CONDENSATE PUMP

Next: &nff, f1337

F70 SOFTWARE INCOMPATIBLE

INTENTIONALLY BLANK - HEADER FOR FAULT CODE

Next: &nff, f1563

FUSE FURTHER INVESTIGATION (DUMMY)

INTENTIONALLY BLANK, HEADER FOR FUSE INVESTIGATION

Next: &nff, f1573

OBSERVATION BURNER IGNITES AND ESTABLISHES

BOILER CH TEMPERATURE SET TO MAX

Next: &635, ?2315, ?2317, ?2319, ?2321

CH MODULATION

Next: &927, f2486

OPERATION DHW

Next: &2983, !f2505

ER FAULT

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f3062

ANTICYCLE

Next: &nff, !f2987

QUICK ACCESS DATA AND INFORMATION


THE TABLE BELOW

Next: &nff, !f2989

LITE DIAGNOSTIC

DIAGNOSIS RELIES ON

Next: &nff, !f2991

HEADER FOR QUICK ACCESS DATA RETURN THERMISTOR

HEADER FOR QUICK ACCESS DATA RETURN THERMISTOR - INTENTIONALLY BLANK

Next: &nff, f2997

DIAGNOSTIC TYPE SELECTION

Next: &130, !f3037

HEADER FOR QUICK ACCESS DATA FLOW THERMISTOR

HEADER FOR QUICK ACCESS DATA FLOW THERMISTOR - INTENTIONALLY BLANK

Next: &nff, f3044

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE - INTENTIONALLY BLANK

Next: &nff, f3045

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE - INTENTIONALLY BLANK

Next: &nff, f3046

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE - INTENTIONALLY BLANK

Next: &nff, f3047

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE - INTENTIONALLY BLANK

Next: &nff, f3049

FAIL DIAG CODES

DUMMY

Next: End

FAIL STATUS CODES

DUMMY

Next: End

_RESET_F5

INTERFACE - APPLIANCE

Next: End

_OUT OF RANGE_F5

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_F5

THERMISTOR - THERMOMETRIC

Next: End

_NON ADJUSTABLE_DSN_F5

INTERFACE - APPLIANCE

Next: End

_RESET_F2

INTERFACE - APPLIANCE

Next: End

_RESET_F6

INTERFACE - APPLIANCE

Next: End

_F10

INTERFACE - APPLIANCE

Next: End

_RESET_F13

INTERFACE - APPLIANCE

Next: End

_NO CONTINUITY_FLOW_F13

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY_RETURN_F13

HARNESS - COMBUSTION

Next: End

NO CONTINUITY_F13

IGNITION LEAD ASSEMBLY

Next: End

_NO CONTINUITY_F13

HARNESS - ZIG

Next: End

_NO CONTINUITY_F13

EARTH LEADS

Next: End

_RESET_F14

INTERFACE - APPLIANCE

Next: End

_RESET_F15

INTERFACE - APPLIANCE

Next: End

_RESET_F22

INTERFACE - APPLIANCE

Next: End

_RESET_F43

INTERFACE - APPLIANCE

Next: End

_ADJUST_F43

DS NUMBER

Next: End

_OC_F43

HARNESS - APPLIANCE INTERFACE

Next: End

_RESET_F77

INTERFACE - APPLIANCE

Next: End

FAIL _FAULT CODES

DUMMY

Next: End

_BLOCKED_NOT ENOUGH HEAT_BOILER AT TEMP

SUMP

Next: End

_RESTRICTED_NOT ENOUGH HEAT _BOILER AT TEMP

PUMP

Next: End

_RESTRICTED_NOT ENOUGH HEAT_BOILER AT TEMP

HEAT EXCHANGER FLUEWAYS

Next: End

_BLOCKAGE_NOT ENOUGH HEAT_BOILER AT TEMP

Next: End

_OUT OF RANGE_F43

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_F43

THERMISTOR - THERMOMETRIC

Next: End

_MANF DEFECT_F43

ELECTRODE

Next: End

FAULT F43

IGNITION LEAD ASSEMBLY

Next: End

F70 NOT RESETTING

INTERFACE - APPLIANCE

Next: End

F70 DSN NOT ADJUSTING

INTERFACE - APPLIANCE

Next: End

F70 STUCK IN FAULT

PCB - MAIN

Next: End

FUSE INVESTIGATION

PUMP

Next: End

_OC_NO DISPLAY

MAIN FUSE FUSED SPUR F1

Next: End

_OC_NO DISPLAY

FUSE F2

Next: End

FAULT F22

Next: End

FAULT F22_OC_PUMP RUNS

HARNESS - MAINS - PUMP

Next: End

FAULT F22

HARNESS - MAINS - PUMP

Next: End

_RESTRICTED_F22

PUMP

Next: End

_OUT OF RANGE_F22

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_F22

THERMISTOR - THERMOMETRIC

Next: End

_OPEN CIRC_POWER UP

HARNESS - APPLIANCE INTERFACE

Next: End

FUSE INVESTIGATION

IGNITOR - ZIG

Next: End

F5 FAULT CODE_NO POWER_

Next: End

F5 FAULT CODE_OC_

HARNESS - MAINS - PUMP

Next: End

F5 FAULT CODE_OC_VOLTAGE AT PUMP_

HARNESS - MAINS - PUMP

Next: End

_RESTRICTED_F5

PUMP

Next: End

_SL PERM POWER_F5

Next: End

_RESTRICTED_F5

Next: End

_OUT OF RANGE_F11STUCK IN FAULT

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_F11STUCK IN FAULT

THERMISTOR - THERMOMETRIC

Next: End

F11 NO RESET

INTERFACE - APPLIANCE

Next: End

_OUT OF RANGE_F6

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_F6

THERMISTOR - THERMOMETRIC

Next: End

F6 DAMAGED

HARNESS - COMBUSTION

Next: End

F10 DAMAGED

HARNESS - COMBUSTION

Next: End

F11 DAMAGED

HARNESS - COMBUSTION

Next: End

F15 DAMAGED

HARNESS - COMBUSTION

Next: End

F3 FAULT CODE_NO POWER TO FAN_FAN RUNS

PCB - MAIN

Next: End

F3 FAULT CODE_HALL SENSE CONNECTION_FAN RUNS TWICE

PCB - MAIN

Next: End

F3 FAULT CODE_OPEN CIRC__FAN RUNS THEN STOPS

HARNESS - COMBUSTION

Next: End

F3 FAULT CODE_PERMANENTLY ON_FAN RUNS

PCB - MAIN

Next: End

F3 FAULT CODE_OPEN CIRC_FAN RUNS CONTINUOUSLY

HARNESS - COMBUSTION

Next: End

F3 FAULT CODE_OPEN CIRC_FAN RUNS

HARNESS - COMBUSTION

Next: End

F3 FAULT CODE__RESTRICTED_FAN DOESNT RUN

FAN MECHANICAL

Next: End

F3 FAULT CODE_FROST PROTECTION ON_FAN RUNS

PCB - MAIN

Next: End

F43 HALL SENSOR_HALL SENSE CONNECTION_FAN RUNS TWICE

PCB - MAIN

Next: End

F43 HALL SENS_OPEN CIRC__FAN RUNS THEN STOPS

HARNESS - COMBUSTION

Next: End

NO DISPLAY

FAN

Next: End

F22 LOW WATER_RESTRICTED OR DAMAGED_

FLUE

Next: End

F22 LOW WATER - CANT CHANGE DSN

INTERFACE - APPLIANCE

Next: End

BURNER DOES NOT IGNITE

GAS SUPPLY

Next: End

_NO CONTINUITY_BURNER DOESNT IGNITE

IGNITION LEAD ASSEMBLY

Next: End

_HALL SENSOR_NO IGNTION_BURNER IGNITES

FAN

Next: End

_NO CONTINUITY_BURNER DOESNT IGNITE

HARNESS - ZIG

Next: End

_DAMAGED_BURNER DOESNT IGNITE

ELECTRODE

Next: End

_NO POWER TO GAS VALVE_BURNER DOESNT IGNITE

PCB - MAIN

Next: End

_BLOCKED_BURNER DOESNT IGNITE

SUMP

Next: End

_RESTRICTED OR DAMAGED_BURNER DOESNT IGNITE

FLUE

Next: End

_RESTRICTED_BURNER DOESN'T IGNITE

GAS VALVE THROTTLE

Next: End

_RESTRICTED_BURNER DOESNT IGNITE

VALVE GAS (AIR INTAKE)

Next: End

_RESTRICTED_BURNER DOESNT IGNITE

GAS VALVE (INJECTOR)

Next: End

_GAS METER_BAFFLES OUT OR NOISY

GAS SUPPLY

Next: End

_BLOCKED_BAFFLES OUT OR NOISY

SUMP

Next: End

BAFFLES OUT OR IS NOISY_RESTRICTED OR DAMAGED

FLUE

Next: End

NOISY BAFFLES MANU DEF

ELECTRODE

Next: End

_RESTRICTED_BAFFLES OUT OR NOISY

GAS VALVE THROTTLE

Next: End

_RETRICTED_BAFFLES OUT OR NOISY

VALVE GAS (AIR INTAKE)

Next: End

BAFFLES OUT OR IS NOISY

BAFFLE - FLUEWAY - TOP

Next: End

EXPLOSIVE IGNITION_GAS METER_

GAS SUPPLY

Next: End

_NO CONTINUITY_EXPLOSIVE IGNITION

IGNITION LEAD ASSEMBLY

Next: End

_FAN SPEED_ EXPLOSIVE IGNITION

PCB - MAIN

Next: End

_NO CONTINUITY_EXPLOSIVE IGNITION

HARNESS - ZIG

Next: End

EXPLOSIVE IGNITION_BLOCKED_BAFFLES OUT OR NOISY

SUMP

Next: End

EXPLOSIVE IGNITION_RESTRICTED OR DAMAGED

FLUE

Next: End

EXPLOSIVE IGNITION_MANF DEFECT_

ELECTRODE

Next: End

EXPLOSIVE IGNITION_RESTRICTED_

GAS VALVE THROTTLE

Next: End

EXPLOSIVE IGNITION_RETRICTED_

VALVE GAS (AIR INTAKE)

Next: End

EXPLOSIVE IGNITION

BAFFLE - FLUEWAY - TOP

Next: End

_GAS METER_BURNER DOESNT ESTABLISH

GAS SUPPLY

Next: End

_OPEN CIRC_FAN RUNS

HARNESS - COMBUSTION

Next: End

_OUT OF RANGE_FAN RUNS

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_FAN RUNS

THERMISTOR - THERMOMETRIC

Next: End

CH MODULATION

THERMISTOR - THERMOMETRIC

Next: End

OPERATION DHW

Next: End

_OUT OF RANGE_POWER UP

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_POWER UP

THERMISTOR - THERMOMETRIC

Next: End

POWER UP

FROST PROTECTION

Next: End

STANDBY FAULT CODES 2

DUMMY

Next: End

NOISY FAILED COMBUSTION

SIPHON

Next: End

OPERATION DHW - NOISY

FLUE

Next: End

OPERATION DHW - NOISY

VALVE GAS (AIR INTAKE)

Next: End

NOISY

GAS VALVE (INJECTOR)

Next: End

NOISY

HEAT EXCHANGER PRIMARY

Next: End

NOISY

BURNER

Next: End

OPERATION DHW - NOISY

PUMP

Next: End

NOISY

SIPHON

Next: End

NOISY

THERMISTOR - THERMOMETRIC

Next: End

NOISY

THERMISTOR - THERMOMETRIC

Next: End

NOISY

Next: End

BOILER NOISY - DIFFERENTIAL WRONG

HEAT EXCHANGER PRIMARY

Next: End

OPERATION DHW - NOISY

FAN

Next: End

EXPLOSIVE IGNITION_RESTRICTED_

BURNER

Next: End

BAFFLES OUT OR IS NOISY_RESTRICTED_

BURNER

Next: End

_RESTRICTED_BURNER DOESNT IGNITE

BURNER

Next: End

F22 LOW WATER_RESTRICTED_

BURNER

Next: End

BAFFLES OUT OR NOISY - AIR INTAKE

FLUE

Next: End

F22 RESETS

SYSTEM PRESSURE

Next: End

BOILER NOISY

SYSTEM PRESSURE

Next: End

NON ADJUSTABLE_SET POINT_BOILER TOO COOL

INTERFACE - APPLIANCE

Next: End

_NON ADJUSTABLE_DSN_BOILER TOO COOL

INTERFACE - APPLIANCE

Next: End

_OUT OF RANGE-BOILER TOO COOL

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_BOILER TOO COOL

THERMISTOR - THERMOMETRIC

Next: End

BOILER TOO COOL_RESTRICTED OR DAMAGED_

FLUE

Next: End

BOILER TOO COOL_RESTRICTED_

BURNER

Next: End

NOT ENOUGH HEAT BOILER AT TEMP

SYSTEM PRESSURE

Next: End

F5

SYSTEM PRESSURE

Next: End

_BLOCKED_F5

SUMP

Next: End

F5

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

_BLOCKAGE_F5

FLUE

Next: End

_RESTRICTED_F5

HEAT EXCHANGER FLUEWAYS

Next: End

_PERMANENTLY ON_BOILER TOO HOT

PCB - MAIN

Next: End

_NOT SET CORRECTLY_TOO HOT

OVERRUN

Next: End

_GAS METER_TOO LOW

GAS SUPPLY

Next: End

BOILER TOO COOL_RESTRICTED OR DAMAGED_ GAS RATE LOW

FLUE

Next: End

BOILER TOO COOL_RESTRICTED_ GAS RATE LOW

BURNER

Next: End

F22 FAULT

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

F22 FAULT CODE

GAS SUPPLY

Next: End

F22 LOW WATER_RESTRICTED OR DAMAGED_ GAS RATE LOW

FLUE

Next: End

F22 LOW WATER_RESTRICTED_ GAS RATE LOW

BURNER

Next: End

DOES NOT ESTABLISH_NO CONTINUITY_

HARNESS - ZIG

Next: End

DOES NOT ESTABLISH_OC_

IGNITION LEAD ASSEMBLY (EARTH LEAD)

Next: End

DOES NOT ESTABLISH_BLOCKED_

SUMP

Next: End

DOES NOT ESTABLISH_RESTRICTED OR DAMAGED_

FLUE

Next: End

DOES NOT ESTABLISH_RESTRICTED_

BURNER

Next: End

NOT RECTIFYING

IGNITION LEAD ASSEMBLY

Next: End

NO RECTIFICATION PATH

IGNITOR - ZIG

Next: End

_DAMAGED_BURNER LIGHTS BUT DOESNT ESTABLISH

ELECTRODE

Next: End

DOES NOT ESTABLISH_RESTRICTED_

VALVE GAS (AIR INTAKE)

Next: End

DOES NOT ESTABLISH_RESTRICTED_

GAS VALVE (INJECTOR)

Next: End

F13

IGNITOR - ZIG

Next: End

OBSERVATION DISPLAY ILLUMINATES

HARNESS - MAINS

Next: End

_PERMANENTLY ON_FAN RUNS

PCB - MAIN

Next: End

_NO CONTINUITY_BURNER DOESNT IGNITE

HARNESS - COMBUSTION

Next: End

F13

ELECTRODE

Next: End

_STUCK IN ANTICYCLE_NO RESPONSE_BOILER OP

SETTING ADJUSTMENT

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION

Next: End

BLANK FOR DIAGNOSICS LITE

Z DIRECTION

Next: End

CASE REMOVAL

NULL TESTS

Next: End

FOR TYPE DIAG PROCEDURE

NULL TESTS

Next: End

OUT OF RANGE (QADAI)

THERMISTOR - THERMOMETRIC

Next: End

OUT OF RANGE (QADAI)

THERMISTOR - THERMOMETRIC

Next: End

NO POWER TO GAS VALVE (QADAI)

PCB - MAIN

Next: End

RESISTANCE WRONG (QADAI)

VALVE - GAS

Next: End

NO POWER TO PUMP QADAI)

PCB - MAIN

Next: End

RESISTANCE INCORRECT (QADAI)

FAN

Next: End

ER FAULT

PCB - MAIN

Next: End

ER FAULT

HARNESS - APPLIANCE INTERFACE

Next: End

CAUSING ER FAULT CODE

FAN

Next: End

_RESTRICTED_F13

VALVE - GAS

Next: End

_RESTRICTED_F14

GAS VALVE THROTTLE

Next: End

_OC_F14

HARNESS - COMBUSTION

Next: End

_HALL SENSE CONNECTION_FAN RUNS TWICE

PCB - MAIN

Next: End

_OPEN CIRC_FAN RUNS CONTINUOUSLY

HARNESS - COMBUSTION

Next: End

_OPEN CIRC__FAN RUNS THEN STOPS

HARNESS - COMBUSTION

Next: End

_NO POWER TO FAN_FAN RUNS

PCB - MAIN

Next: End

_OC_VOLTAGE AT PUMP_PUMP RUNS

HARNESS - MAINS - PUMP

Next: End

_OC_PUMP RUNS

HARNESS - MAINS - PUMP

Next: End

_NO POWER_PUMP RUNS

Next: End

_OUT OF RANGE_NOT ENOUGH HEAT _BOILER AT TEMP

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_NOT ENOUGH HEAT _BOILER AT TEMP

THERMISTOR - THERMOMETRIC

Next: End

_NON ADJUSTABLE_DSN_NOT ENOUGH HEAT_BOILER AT TEMP

INTERFACE - APPLIANCE

Next: End

NON ADJUSTABLE_SET POINT_NOT ENOUGH HEAT_BOILER AT TEMP

INTERFACE - APPLIANCE

Next: End

NON ADJUSTABLE_SET POINT_BOILER TOO HOT

INTERFACE - APPLIANCE

Next: End

_NON ADJUSTABLE_DSN_BOILER TOO HOT

INTERFACE - APPLIANCE

Next: End

_OUT OF RANGE-BOILER TOO HOT

THERMISTOR - THERMOMETRIC

Next: End

_OUT OF RANGE_BOILER TOO HOT

THERMISTOR - THERMOMETRIC

Next: End

_NON ADJUSTABLE_DSN_NOISY

INTERFACE - APPLIANCE

Next: End

_NO POWER_DHW OP

Next: End

PASS DIAG CODES

DUMMY

Next: End

PASS STATUS CODES

DUMMY

Next: End

PASS_SET POINT_AT TEMP

DUMMY

Next: End

PASS_SET POINT_TOO HOT

DUMMY

Next: End

_NO CONTINUITY FLOW_F5

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_F5

HARNESS - COMBUSTION

Next: End

PASS_DSN_LINK TO THERMISTORS_F5

DUMMY

Next: End

_F13

PCB - MAIN

Next: End

_BLOCKAGE_F77

CONDENSATE TANK

Next: End

PASS_FAULT CODES

DUMMY

Next: End

_BLOCKED_NOT ENOUGH HEAT_BOILER AT TEMP

SIPHON

Next: End

_BLOCKED_NOT ENOUGH HEAT_BOILER AT TEMP

HEAT EXCHANGER

Next: End

_NO CONTINUITY FLOW_F43

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_F43

HARNESS - COMBUSTION

Next: End

F70 INCORRECT

DS NUMBER ADJUSTMENT

Next: End

F70 RESET

DS NUMBER ADJUSTMENT

Next: End

FUSE INVESTIGATION

HARNESS - MAINS - PUMP

Next: End

FUSE INVESTIGATION F1

NULL TESTS

Next: End

FUSE INVESTIGATION F2

NULL TESTS

Next: End

FAULT F22

HARNESS - MAINS

Next: End

FAULT F22

Next: End

FAULT F22 NO POWER TO PUMP

PCB - MAIN

Next: End

FAULT F22_NOT RUNNING

PUMP

Next: End

FAULT F22

PUMP WIRING

Next: End

_NO CONTINUITY FLOW_F22

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_F22

HARNESS - COMBUSTION

Next: End

_NO VOLTAGE_POWER UP

INTERFACE - APPLIANCE

Next: End

FUSE INVESTIGATION

FUSE BLOWN

Next: End

FUSE INVESTIGATION

HARNESS - ZIG

Next: End

F5 FAULT CODE_NO CONTINUITY_

HARNESS - MAINS

Next: End

F5 FAULT CODE_NO DEMAND_

Next: End

F5 FAULT CODE_PUMP NO POWER_

PCB - MAIN

Next: End

F5 FAULT CODE_NOT RUNNING_

PUMP

Next: End

F5 FAULT CODE_OC_

PUMP WIRING

Next: End

_SL PERM POWER_F5

PCB - MAIN

Next: End

_NO CONTINUITY FLOW_F11STUCK IN FAULT

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_F11STUCK IN FAULT

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY FLOW_F6

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_F6

HARNESS - COMBUSTION

Next: End

_F6

PCB - MAIN

Next: End

F10_

PCB - MAIN

Next: End

_NO POWER TO INTERFACE_POWER UP

PCB - MAIN

Next: End

F15

PCB - MAIN

Next: End

F3 FAULT CODE_HALL SENSOR_FAN RUNS THEN STOPS

FAN

Next: End

F3 FAULT CODE_HALL SENSOR_FAN RUNS

FAN

Next: End

F3 FAULT CODE_NO VOLTAGE BACK FROM FAN_FAN DOESNT RUN

FAN

Next: End

_F43

PCB - MAIN

Next: End

F43 HALL SENSOR_HALL SENSOR_FAN RUNS THEN STOPS

FAN

Next: End

F5

PCB - MAIN

Next: End

F5 NO OVERRUN

PCB - MAIN

Next: End

F11

PCB - MAIN

Next: End

SHORTED NO DISPLAY

HARNESS - COMBUSTION

Next: End

BOILER OPERATION NOT ENOUGH HEAT

HEAT OUTPUT SETTING

Next: End

BOILER OPERATION TOO HOT

HEAT OUTPUT SETTING

Next: End

BOILER OPERATION NOISY

HEAT OUTPUT SETTING

Next: End

F22 FAULT

HEAT OUTPUT SETTING

Next: End

BURNER DOES NOT IGNITE

GAS SUPPLY PIPEWORK

Next: End

POWER UP FAN RUNS

Next: End

_FAN SPEED_BURNER DOESNT IGNITE

PCB - MAIN

Next: End

_NO SPARK_BURNER DOESNT IGNITE

IGNITOR - ZIG

Next: End

_BLOCKED_BURNER DOESNT IGNITE

SIPHON

Next: End

_FLUEWAYS BLOCKED_BURNER DOESNT IGNITE

HEAT EXCHANGER PRIMARY

Next: End

_RETRICTED_BURNER DOESNT IGNITE

VALVE - GAS

Next: End

RESTRICTED_BAFFLES OUT OR NOISY

GAS SUPPLY PIPEWORK

Next: End

_BLOCKED_BAFFLES OUT OR NOISY

SIPHON

Next: End

BAFFLES OUT OR IS NOISY_FLUEWAYS BLOCKED_

HEAT EXCHANGER PRIMARY

Next: End

BAFFLES OUT OR IS NOISY

VALVE - GAS

Next: End

EXPLOSIVE IGNITIONRESTRICTED_

GAS SUPPLY PIPEWORK

Next: End

_NO SPARK_EXPLOSIVE IGNITION

IGNITOR - ZIG

Next: End

EXPLOSIVE IGNITION_BLOCKED_

SIPHON

Next: End

EXPLOSIVE IGNITION_FLUEWAYS BLOCKED_

HEAT EXCHANGER PRIMARY

Next: End

EXPLOSIVE IGNITION

VALVE - GAS

Next: End

RESTRICTED_BURNER DOESN'T ESTABLISH

GAS SUPPLY PIPEWORK

Next: End

_NO VOLTAGE BACK FROM FAN_FAN DOESNT RUN

FAN

Next: End

_NO CONTINUITY FLOW_FAN RUNS

HARNESS - COMBUSTION

Next: End

_FROST PROTECTION ON_FAN RUNS

PCB - MAIN

Next: End

_NO CONTINUITY RETURN_FAN RUNS

HARNESS - COMBUSTION

Next: End

CH MODULATION

PCB - MAIN

Next: End

_FROST STAT_POWER UP

EXTERNAL FROST STAT CONTROL

Next: End

_NO CONTINUITY FLOW_POWER UP

HARNESS - COMBUSTION

Next: End

_PERMANENTLY ON_POWER UP

PCB - MAIN

Next: End

_NO CONTINUITY RETURN_POWER UP

HARNESS - COMBUSTION

Next: End

STANDBY FAULT CODES 1

DUMMY

Next: End

NOISY

VALVE - GAS (ADJUSTMENT)

Next: End

BOILER NOISY - DIFFERENTIAL OK

HEAT EXCHANGER PRIMARY

Next: End

F22 LOW WATER_FLUEWAYS BLOCKED_

HEAT EXCHANGER PRIMARY

Next: End

PASS_SET POINT_TOO COOL

DUMMY

Next: End

BOILER OPEATION TOO COOL

HEAT OUTPUT SETTING

Next: End

_NO CONTINUITY FLOW_BOILER TOO COOL

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_BOILER TOO COOL

HARNESS - COMBUSTION

Next: End

BOILER TOO COOL _FLUEWAYS BLOCKED_

HEAT EXCHANGER PRIMARY

Next: End

_BLOCKED_F5

SIPHON

Next: End

F5

NO FAULT

Next: End

_PERM POWER_BOILER TOO HOT

Next: End

BOILER TOO HOT NO OVERRUN

PCB - MAIN

Next: End

BOILER TOO HOT

PCB - MAIN

Next: End

BOILER AND SYSTEM TOO HOT

PCB - MAIN

Next: End

BOILER TOO COOL

Next: End

RESTRICTED_TOO LOW

GAS SUPPLY PIPEWORK

Next: End

BOILER TOO COOL _FLUEWAYS BLOCKED_ GAS RATE LOW

HEAT EXCHANGER PRIMARY

Next: End

F22

NO FAULT

Next: End

F22 LOW WATER_FLUEWAYS BLOCKED_ GAS RATE LOW

HEAT EXCHANGER PRIMARY

Next: End

DOES NOT ESTABLISH_BLOCKED_

SIPHON

Next: End

DOES NOT ESTABLISH_FLUEWAYS BLOCKED_BURNER DOESNT IGNITE

HEAT EXCHANGER PRIMARY

Next: End

NO RECTIFICATION

PCB - MAIN

Next: End

SUPPLY FAULT

Next: End

NO IGNITION - SOLENOID FAULT

VALVE - GAS

Next: End

_HALL SENSOR_FAN RUNS

FAN

Next: End

RETURN THERMISTOR SATISFACTORY

RESULT AS EXPECTED

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

PUMP VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN SATISFACTORY

RESULT AS EXPECTED

Next: End

ER FAULT

INTERFACE - APPLIANCE

Next: End

UNABLE TO RESET

PCB - MAIN

Next: End

_F14

PCB - MAIN

Next: End

_NO VOLTAGE_F14

PCB - MAIN

Next: End

_HALL SENSOR_FAN RUNS_FAN RUNS THEN STOPS

FAN

Next: End

_NOT RUNNING_PUMP RUNS

PUMP

Next: End

_OC_PUMP RUNS

PUMP WIRING

Next: End

_PUMP NO POWER_FAN RUNS

PCB - MAIN

Next: End

_NO CONTINUITY_PUMP RUNS

HARNESS - MAINS

Next: End

_NO DEMAND_PUMP RUNS

Next: End

_NO CONTINUITY FLOW_NOT ENOUGH HEAT _BOILER AT TEMP

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_NOT ENOUGH HEAT _BOILER AT TEMP

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY FLOW_BOILER TOO HOT

HARNESS - COMBUSTION

Next: End

_NO CONTINUITY RETURN_BOILER TOO HOT

HARNESS - COMBUSTION

Next: End

_SL NOT RECOGNISED_NO RESPONSE_DHW OP

PCB - MAIN

Next: End

_NO CONTINUITY_DHW OP

HARNESS - MAINS

Next: End

PASS_LINK TO END OF MODEL

DUMMY

Next: End

_NO POWER_DHW DEMAND

Next: End

DISPLAY DOES NOT OPERATE

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p157

BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p194

FAN RUNS FOR APPROX 10 SECONDS THEN STOPS 4 TIMES

CHARACTERISTIC TEST FROM FAN RUNS

Next: p2119

FAN DOESN'T RUN

CHARACTERISTIC TEST FROM FAN RUNS

Next: p2121

PUMP OVERRUN NOT INDICATED

CHARACTERISTIC TEST FROM PUMP OVERRUN STATUS

Next: !p2209

PUMP OVERRUN INDICATED BUT PUMP NOT RUNNING

CHARACTERISTIC TEST FROM PUMP OVERRUN STATUS

Next: !p2208

BURNER IGNITES BUT DOESNT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p2316

BURNER IGNITES AND ESTABLISHES BUT WITH EXPLOSIVE IGNITION

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p2318

IGNITES BUT NOISY OR BAFFLES OUT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p2320

BURNER DOESNT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p2322

FAULT CODE OR ER DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p2520

FAN RUNS CONTINUALLY WITH NO DEMAND

CHARACTERISTIC TEST FROM FAN RUNS

Next: p274

FAN RUNS FOR APPROX 10 SECONDS THEN STOPS 4 TIMES

CHARACTERISTIC TEST FROM FAN RUNS

Next: p276

FAN DOESN'T RUN

CHARACTERISTIC TEST FROM FAN RUNS

Next: p279

PUMP OVERRUN NOT INDICATED

CHARACTERISTIC TEST FROM PUMP OVERRUN STATUS

Next: !p2836

PUMP OVERRUN INDICATED BUT PUMP NOT RUNNING

CHARACTERISTIC TEST FROM PUMP OVERRUN STATUS

Next: !p2838

UNABLE TO RESET PCB

CHARACTERISTIC TEST FROM GAS VALVE VOLTAGE

Next: !p3078

VOLTAGE NOT AS EXPECTED

CHARACTERISTIC TEST FROM GAS VALVE VOLTAGE

Next: p3122

BOILER AT TEMPERATURE BUT SYSTEM TOO COOL

CHARACTERISTIC TEST FROM BOILER OPERATION

Next: p2733

BOILER AND SYSTEM RUNNING TOO HOT

CHARACTERISTIC TEST FROM BOILER OPERATION

Next: p641

BOILER AND SYSTEM TOO COOL

CHARACTERISTIC TEST FROM BOILER OPERATION

Next: p2702

BOILER NOISY

CHARACTERISTIC TEST FROM BOILER OPERATION

Next: p2634

04/05/2023 15:28:30 2303_1_50_1 21/06/2023 12:20:47

05/05/2023 09:31:29

Next: End

DIAGNOSTIC NUMBER CODES

Next: !p1021, !f1022

STATUS CODES

Next: !p1031, !f1032

RESET (OVERHEAT)

ENSURE BOILER IS COOL
USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p1100, !f1087

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p1107, !f1108

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p1111, !f1112

ADJUSTMENT HEATING OUTPUT F5

Next: !p1114, !f1115

RESET (FAN FAULT)

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p2115, !f1178

RESET THERMISTOR FAULT

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p2029, !f1192

RESET THERMISTOR FAULT

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p2034, !f1212

RESET THERMISTOR FAULT

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p2019, !f2028

RESET

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p1252, !f1253

RESET

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p1265, !f1266

RESET

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p2049, !f1287

RESET F22 / F25

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p2593, !f1290

RESET

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p1321, !f1322

RESET

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: !p1338, !f1339

FAULT CODES

Next: !p1342, !f1343

SUMP

DISCONNECT THE CONDE

Next: !p1476, !f1477

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p1489, !f1490

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p1493, !f1494

RESET

USING A SMALL IMPLEMENT, PRESS THE RESET BUTTON BELOW THE DISPLAY

Next: p1564, !f1565

DS NUMBER ADJUSTMENT F70

ACCESS LEVEL 2 DIAGNOSTICS AS IN THE PREVIOUS TEST.

Next: !p1568, !f1569

RESISTANCE PUMP AND HARNESS

DISCONNECT CONNECTOR X14 FROM THE PCB

Next: p1934, f1574

RESISTANCE PUMP

GAIN ACCESS TO PUMP WIRING CONNECTIONS
DISCONNECT WIRES FROM THE PUMP

Next: !p1580, !f1581

FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: p2946, f1592

FUSE FURTHER INVESTIGATION

Next: !p1594, !f1595

FUSE FURTHER INVESTIGATION

Next: !p1596, !f1597

PUMP VOLTAGE FROM PCB

{GAINPCBACS}
GAIN ACCESS TO THE TOP RHS OF THE PCB, CONNECTOR X14

Next: p1600, f1601

SWITCHED LIVE VOLTAGE AT PCB

Next: p1602, f1603

SWITCHED LIVE AT MAINS CONNECTION

GAIN ACCESS TO THE M

Next: !p1604, f1605

HOT WATER DEMAND

TURN ON THE HOT WATE

Next: !p1606, !f1607

PUMP HARNESS CONTINUITY

GAIN ACCESS TO THE ELECTRIC INTERFACE HOUSING ALSO REMOVE THE X14 PLUG FORM THE RHS OF THE PCB

Next: !p1612, !f1613

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p1619, !f1620

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p1623, !f1624

FUSE F2 (APPLIANCE)

REMOVE FUSE FROM FUSE AND HOLDER FROM PCB

Next: !p205, f1593

RESISTANCE SPARK GENERATOR

DISCONNECT THE MAINS INTO THE SPARK GENERATOR

Next: !p1937, !f1938

PUMP VOLTAGE FROM PCB

{GAINPCBACS}
GAIN ACCESS TO THE TOP RHS OF THE PCB, CONNECTOR X14

Next: p1977, f1978

SWITCHED LIVE VOLTAGE AT PCB

Next: p1979, f1980

SWITCHED LIVE AT MAINS CONNECTION

GAIN ACCESS TO THE M

Next: !p1981, f1982

HOT WATER DEMAND

TURN ON THE HOT WATE

Next: !p1983, !f1984

PUMP HARNESS CONTINUITY

GAIN ACCESS TO THE ELECTRIC INTERFACE HOUSING ALSO REMOVE THE X14 PLUG FORM THE RHS OF THE PCB

Next: !p1989, !f1990

SWITCHED LIVE AT MAINS CONNECTION

GAIN ACCESS TO THE M

Next: !p1998, !f1999

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p2022, !f2023

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p2026, !f2027

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p2032, !f2033

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p2037, !f2038

FAN VOLTAGE AT PCB B

GAIN ACCESS TO THE X20 CONNECTOR ON THE RIGHT HAND SIDE OF THE PCB

Next: p2176, !f2177

OBSERVATION DISCONNECT FAN

REFIT CONNECTOR X20

Next: !p2232, !f2233

FLUE

Next: p2285, !f2286

ADJUSTMENT HEATING OUTPUT F22

Next: !p2312, !f2313

INLET PRESSURE AT METER

ATTACH GAUGE TO INLET PRESSURE TEST POINT OF METER

Next: !p2325, !f2326

SPARK ELECTRODE LEAD

DISCONNECT THE SPARK ELECTRODE LEAD

Next: p2329, !f2330

FAN VOLTAGE AT PCB

ACCESS THE X20 CONNECTOR ON THE RIGHT HAND SIDE OF THE PCB

Next: !p2333, !f2334

SUMP

DISCONNECT THE CONDE

Next: !p2345, !f2346

FLUE

Next: p2349, !f2350

INLET PRESSURE AT METER

ATTACH GAUGE TO INLET PRESSURE TEST POINT OF METER

Next: !p2365, !f2366

SUMP

DISCONNECT THE CONDE

Next: !p2369, !f2370

FLUE

Next: p2373, !f2374

INLET PRESSURE AT METER

ATTACH GAUGE TO INLET PRESSURE TEST POINT OF METER

Next: !p2391, !f2392

SPARK ELECTRODE LEAD

DISCONNECT THE SPARK ELECTRODE LEAD

Next: p2395, !f2396

SUMP

DISCONNECT THE CONDE

Next: !p2403, !f2404

FLUE

Next: p2407, !f2408

INLET PRESSURE AT METER

ATTACH GAUGE TO INLET PRESSURE TEST POINT OF METER

Next: !p2425, !f2426

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p2464, f2465

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p2466, !f2467

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p2470, !f2471

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p2487, !f2488

TEMPERATURE AMBIENT

Next: p2507, !f2518

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p2510, f2511

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p2512, !f2513

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p2516, !f2517

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p2537, !f2538

SET POINT ADJUSTMENT (TOO COOL)

Next: !p2705, !f2706

ADJUSTMENT HEATING OUTPUT

Next: !p2709, !f2710

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p2713, !f2714

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p2717, !f2718

FLUE

Next: p2721, !f2722

SUMP

DISCONNECT THE CONDE

Next: !p2820, !f2821

SWITCHED LIVE AT MAINS CONNECTION

GAIN ACCESS TO THE M

Next: !p2831, !f2832

INLET PRESSURE (RUNNING)

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: p2844, f2845

INLET PRESSURE AT METER

ATTACH GAUGE TO INLET PRESSURE TEST POINT OF METER

Next: !p2846, !f2847

INLET PRESSURE (RUNNING)

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: p2857, !f2858

SUMP

DISCONNECT THE CONDE

Next: !p2870, !f2871

FLUE

Next: p2874, !f2875

GAS VALVE HARNESS CONTINUITY

REMOVE THE PLUG FROM THE GAS VALVE
DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p2972, !f2973

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p3050, !f3051

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p3052, !f3053

GAS VALVE VOLTAGE

Next: !p3054, !f3055

PUMP VOLTAGE FROM PCB

{GAINPCBACS}
GAIN ACCESS TO THE TOP RHS OF THE PCB, CONNECTOR X14

Next: !p3058, !f3059

RESISTANCE FAN

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p3060, !f3061

RESISTANCE GAS VALVE

DISCONNECT LEAD FROM GAS VALVE

Next: !p3056, !f3057

OBSERVATION DISCONNECT FAN (ER FAULT)

REMOVE THE FAN CONNECTOR AND MAKE SAFE

Next: p3063, !f3068

PUMP VOLTAGE FROM PCB

{GAINPCBACS}
GAIN ACCESS TO THE TOP RHS OF THE PCB, CONNECTOR X14

Next: p601, f646

PUMP HARNESS CONTINUITY

GAIN ACCESS TO THE ELECTRIC INTERFACE HOUSING ALSO REMOVE THE X14 PLUG FORM THE RHS OF THE PCB

Next: !p609, !f610

SWITCHED LIVE VOLTAGE AT PCB

Next: p647, f650

SWITCHED LIVE AT MAINS CONNECTION

GAIN ACCESS TO THE M

Next: !p651, f687

HOT WATER DEMAND

TURN ON THE HOT WATE

Next: !p688, !f689

SET POINT ADJUSTMENT (BOILER AT TEMP)

Next: !p1037, !f739

ADJUSTMENT HEATING OUTPUT

Next: !p2235, !f738

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p702, !f703

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p706, !f707

SET POINT ADJUSTMENT (TOO HOT)

Next: !p1038, !f745

ADJUSTMENT HEATING OUTPUT

Next: !p2236, !f749

FLOW THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE THERMISTOR

Next: !p753, !f754

RETURN THERMISTOR RESISTANCE

REMOVE THE SPADE CONNECTORS FROM THE RETURN THERMISTOR

Next: !p766, !f767

ADJUSTMENT HEATING OUTPUT

Next: !p2238, !f794

DHW DEMAND RECOGNISED

Next: !p964, f957

SWITCHED LIVE VOLTAGE AT PCB

Next: !p958, f959

SWITCHED LIVE AT MAINS CONNECTION

GAIN ACCESS TO THE M

Next: !p960, f961

CH DEMAND

Next: !p965, !f963

INSPECTION HEAT OUTPUT SETTING

Next: p2762, f1113

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p1105, f1106

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p1974, f1110

FLOW THERMISTOR HARNESS CONTINUITY

DISCONNECT THE SPADE CONNECTORS FROM THE THERMISTOR AND THE X20 CONNECTOR FROM THE RHS OF THE PCB

Next: p1254, !f1255

RETURN THERMISTOR HARNESS CONTINUITY

DISCONNECT THE SPADE

Next: p1256, !f1257

SPARK ELECTRODE LEAD

DISCONNECT THE SPARK ELECTRODE LEAD

Next: p2974, !f1259

SPARK GENERATOR LEAD

UNPLUG THE LEAD FROM THE SPARK GENERATOR AND X21 OF THE PCB

Next: p2941, !f1261

EARTH LEADS CONTINUITY

GAIN ACCESS TO THE EARTH LEADS ON THE BOILER

Next: !p1262, !f1263

GAS VALVE VOLTAGE

Next: p3113, ?3077, ?3103

DS NUMBER

Next: p1323, !f1334

INTERFACE HARNESS CONTINUITY

REMOVE THE HARNESS FROM THE INTERFACE PCB AND X51 AT THE PCB

Next: p1485, !f1335

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p1478, f1475

PUMP LIMPET

Next: p1480, !f1479

HEAT EXCHANGER FLUEWAYS

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM
THE TOP OF THE HEAT EXCHANGER

Next: p1481, !f1482

FLOW AND RETURN TEMPERATURE DIFFERENTIAL

ATTACH TEMPERATURE PROBES TO THE FLOW AND RETURN PIPES NEAR TO THE BOILER

Next: !p1483, !f1484

ELECTRODE

Next: p1532, !f1496

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p1487, f1488

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p2169, f1492

SPARK ELECTRODE LEAD

DISCONNECT THE SPARK ELECTRODE LEAD

Next: p1486, !f1542

DS NUMBER

Next: p1566, f1567

DS NUMBER RESET (F70)

ACCESS LEVEL 2 DIAGNOSTICS AS IN THE PREVIOUS TEST.

Next: !p1570, !f1571

MAINS POWER INPUT TO APPLIANCE

{GAINPCBACS}
REMOVE LOWER CONTROL BOX FRONT PANEL

Next: p2221, f159

PUMP RUNS

MAKE SURE ALL STATS ARE TURNED UP
BOILER CH TEMPERATURE SET TO MAX

Next: p1614, f1599

VOLTAGE AT PUMP

REMOVE THE COVER FROM THE PUMP

Next: !p1610, f1611

PUMP HARNESS CONTINUITY

GAIN ACCESS TO THE ELECTRIC INTERFACE HOUSING ALSO REMOVE THE X14 PLUG FORM THE RHS OF THE PCB

Next: !p1608, !f1609

PUMP LIMPET

Next: p1615, !f1616

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p1617, f1618

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p2293, f1622

PRESSURE FAN ON IGNITION

ATTACH THE PRESSURE GAUGE TO THE OUTLET PRESSURE TEST POINT

Next: p2852, f2284

VOLTAGE TO INTERFACE PCB

REMOVE THE INTERFACE HARNESS PLUG FROM X51 OF THE PCB

Next: p186, f187

INTERFACE HARNESS CONTINUITY

REMOVE THE HARNESS FROM THE INTERFACE PCB AND X51 AT THE PCB

Next: !p192, !f193

RESISTANCE SPARK GENERATOR AND HARNESS

DISCONNECT CONNECTOR X21 FROM THE PCB

Next: !p1935, f1936

VOLTAGE PCB SWITCHED LIVE

{GAINPCBACS}
TURN OFF ANY DEMAND FROM EXTERNAL CONTROLS E.G. PROGRAMMER, FROST STAT ETC

Next: !p233, f2506

PUMP RUNS

MAKE SURE ALL STATS ARE TURNED UP
BOILER CH TEMPERATURE SET TO MAX

Next: p1993, f1976

VOLTAGE AT PUMP

REMOVE THE COVER FROM THE PUMP

Next: !p1987, f1988

PUMP HARNESS CONTINUITY

GAIN ACCESS TO THE ELECTRIC INTERFACE HOUSING ALSO REMOVE THE X14 PLUG FORM THE RHS OF THE PCB

Next: !p1985, !f1986

PUMP LIMPET

Next: p1994, !f1995

END OF DEMAND

Next: p1996, f1997

PUMP OVERRUN STATUS

Next: p2000, ?2205, ?2207

SYSTEM BYPASS

Next: p2817, !f2003

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p2020, f2021

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p2046, f2025

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p2040, f2031

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p2043, f2036

INSPECTION HARNESS

GAIN ACCESS TO PCB

Next: !p2041, !f2042

INSPECTION HARNESS

GAIN ACCESS TO PCB

Next: !p2044, !f2045

INSPECTION HARNESS

GAIN ACCESS TO PCB

Next: !p2216, !f2048

INSPECTION HARNESS

GAIN ACCESS TO PCB

Next: !p2050, !f2051

FAN RUNS (FAULT CODE)

Next: p2152, ?2118, ?2120

FAN VOLTAGE AT PCB B

GAIN ACCESS TO THE X20 CONNECTOR ON THE RIGHT HAND SIDE OF THE PCB

Next: p2138, !f2139

FAN VOLTAGE AT PCB

GAIN ACCESS TO X20 CONNECTOR ON THE PCB

Next: p2122, !f2123

FAN VOLTAGE AT PCB G AND B - NO FAN

ACCESS THE X20 CONNE

Next: p2160, !f2165

FAN HARNESS CONTINUITY

UNPLUG THE HARNESS FROM THE FAN AND X20 AT THE PCB

Next: !p2140, !f2141

FAN VOLTAGE AT PCB

GAIN ACCESS TO THE RIGHT HAND SIDE OF THE PCB CONNECTOR X20

Next: p2153, !f2154

FAN HARNESS CONTINUITY

UNPLUG THE HARNESS FROM THE FAN AND X20 AT THE PCB

Next: !p2155, !f2156

FAN HARNESS CONTINUITY

UNPLUG THE HARNESS FROM THE FAN AND X20 AT THE PCB

Next: p2161, !f2162

FAN MECHANICAL

REMOVE THE GAS VALVE FROM THE SIDE OF THE FAN

Next: !p2163, !f2164

FAN RUNS F43

Next: !p2173, f2175

FAN HARNESS CONTINUITY

UNPLUG THE HARNESS FROM THE FAN AND X20 AT THE PCB

Next: !p2178, !f2179

OBSERVATION DISCONNECT X20

DISCONNECT CONNECTOR X20 FROM THE PCB AND MAKE SAFE

Next: p185, f2231

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2581, !f2580

INSPECTION HEAT OUTPUT SETTING

Next: p1760, f2311

INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: p2863, f2424

INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: p2389, f2390

INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: p2363, f2364

INLET PRESSURE

ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: p2323, f2324

SPARK TEST

REMOVE THE HT LEAD F

Next: p2327, f2328

ELECTRODE

Next: p2949, !f2338

POWER TO SPARK GENERATOR

ACCESS AND MOVE THE

Next: p2331, f2332

SPARK GENERATOR LEAD

UNPLUG THE LEAD FROM THE SPARK GENERATOR AND X21 OF THE PCB

Next: !p2335, !f2336

GAS VALVE VOLTAGE

Next: p2339, !f2340

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p2343, f2344

PRESSURE FAN ON IGNITION

ATTACH THE PRESSURE GAUGE TO THE OUTLET PRESSURE TEST POINT

Next: p2347, f2348

GAS VALVE THROTTLE

USING A 2.5MM ALLEN

Next: p2357, !f2358

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2351, !f2574

AIR INTAKE

REMOVE THE GAS VALVE

Next: p2359, !f2360

INJECTOR

REMOVE THE GAS VALVE

Next: !p2361, !f2362

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p2367, f2368

PRESSURE FAN ON IGNITION

ATTACH THE PRESSURE GAUGE TO THE OUTLET PRESSURE TEST POINT

Next: p2582, f2372

ELECTRODE

Next: p2381, !f2382

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2375, !f2572

GAS VALVE THROTTLE BAFFLES

USING A 2.5MM ALLEN

Next: p2383, !f2384

AIR INTAKE

REMOVE THE GAS VALVE

Next: p2385, !f2386

HEAT EXCHANGER BAFFLE

REMOVE THE BURNER FR

Next: !p2387, !f2388

SPARK TEST

REMOVE THE HT LEAD F

Next: p2393, f2394

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p2401, f2402

POWER TO SPARK GENERATOR

ACCESS AND MOVE THE

Next: p2397, !f2398

SPARK GENERATOR LEAD

UNPLUG THE LEAD FROM THE SPARK GENERATOR AND X21 OF THE PCB

Next: !p2399, !f2400

PRESSURE FAN ON IGNITION

ATTACH THE PRESSURE GAUGE TO THE OUTLET PRESSURE TEST POINT

Next: p2405, f2406

ELECTRODE

Next: p2415, !f2416

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2409, !f2570

GAS VALVE BASE SETTINGS BAFFLES

GAS VALVE BASE SETTI

Next: p2417, !f2418

AIR INTAKE

REMOVE THE GAS VALVE

Next: p2419, !f2420

HEAT EXCHANGER BAFFLE

REMOVE THE BURNER FR

Next: !p2421, !f2422

FAN HARNESS CONTINUITY

UNPLUG THE HARNESS FROM THE FAN AND X20 AT THE PCB

Next: !p2461, !f2462

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: !p2468, f2469

FROST STAT INPUT TO PCB

ENSURE NO DEMAND FROM THE EXTERNAL CONTROLS

Next: !p2508, f2509

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: !p2514, f2515

FAULT CODES

Next: !p2521, !f2522

COMBUSTION TEST HIGH AND LOW

Next: p2535, f2536

PUMP LIMPET TEST

Next: p2549, !f2550

FLUE

Next: p2539, !f2540

AIR INTAKE

REMOVE THE GAS VALVE

Next: p2541, !f2542

INJECTOR

REMOVE THE GAS VALVE

Next: p2543, !f2544

HEAT EXCHANGER FLUEWAYS

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM
THE TOP OF THE HEAT EXCHANGER

Next: p2545, !f2546

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2547, !f2548

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p2551, !f2552

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p2553, !f2554

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p2555, !f2556

SYSTEM BYPASS

Next: p2557, !f2558

FLOW AND RETURN TEMPERATURE DIFFERENTIAL

ATTACH TEMPERATURE PROBES TO THE FLOW AND RETURN PIPES NEAR TO THE BOILER

Next: p2559, !f2560

FAN MECHANICAL

REMOVE THE GAS VALVE FROM THE SIDE OF THE FAN

Next: !p2565, !f2566

FLUE

Next: p2371, !f2592

INSPECTION SYSTEM FILLED AND VENTED

Next: p1598, !f2633

INSPECTION SYSTEM FILLED AND VENTED

Next: p645, !f2668

BOILER THERMOSTAT SET POINT

Next: p2703, f2704

INSPECTION HEAT OUTPUT SETTING

Next: p2707, f2708

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p2711, f2712

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p2715, f2716

PRESSURE FAN ON IGNITION

ATTACH THE PRESSURE GAUGE TO THE OUTLET PRESSURE TEST POINT

Next: p2841, f2720

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2723, !f2724

INSPECTION SYSTEM FILLED AND VENTED

Next: p639, !f2761

FAN VOLTAGE AT PCB

GAIN ACCESS TO THE RIGHT HAND SIDE OF THE PCB CONNECTOR X20

Next: p297, !f296

FAN VOLTAGE AT PCB B

GAIN ACCESS TO THE X20 CONNECTOR ON THE RIGHT HAND SIDE OF THE PCB

Next: p322, !f320

INSPECTION SYSTEM FILLED AND VENTED

Next: p1104, !f2816

FAN VOLTAGE AT PCB

GAIN ACCESS TO X20 CONNECTOR ON THE PCB

Next: p346, !f372

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p2818, f2819

TEMPERATURE DIFFERENTIAL

ATTACH TEMPERATURE PROBES TO THE FLOW AND RETURN PIPES NEAR TO THE BOILER

Next: p2822, !f2823

FLUE

Next: p2824, !f2825

HEAT EXCHANGER FLUEWAYS

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM
THE TOP OF THE HEAT EXCHANGER

Next: !p2826, !f2827

END OF DEMAND

Next: p2829, f2830

PUMP OVERRUN STATUS

Next: p2833, ?2835, ?2837

OVERRUN SET CORRECTLY

Next: !p2839, !f2840

GAS RATE

Next: !p2842, f2843

FLUE

Next: p2848, !f2849

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2850, !f2851

TEMPERATURE DIFFERENTIAL

ATTACH TEMPERATURE PROBES TO THE FLOW AND RETURN PIPES NEAR TO THE BOILER

Next: p2853, !f2854

GAS RATE

Next: !p2855, f2856

FLUE

Next: p2859, !f2860

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2861, !f2862

RESISTANCE HARNESS SPARK GENERATOR

UNPLUG THE LEAD FROM THE SPARK GENERATOR AND X21 OF THE PCB

Next: p2864, !f2865

EARTH CONTINUITY

DISCONNECT THE EARTH LEAD FROM THE ELECTRODE

Next: p2893, !f2867

CONDENSATE TRAP AND SUMP CHECK

DISCONNECT THE PUSH

Next: p2868, f2869

PRESSURE FAN ON IGNITION

ATTACH THE PRESSURE GAUGE TO THE OUTLET PRESSURE TEST POINT

Next: p2932, f2873

INSPECTION BURNER

REMOVE THE FAN/GAS VALVE ASSEMBLY AND BURNER FROM THE TOP OF THE HEAT EXCHANGER

Next: !p2876, !f2877

SPARK ELECTRODE LEAD

DISCONNECT THE SPARK ELECTRODE LEAD

Next: p2912, !f2911

RESISTANCE SPARK GENERATOR (RECTIFICATION)

REMOVE WIRES FROM SPARK GENERATOR

Next: p2866, !f2930

ELECTRODE

Next: p2936, !f2934

AIR INTAKE

REMOVE THE GAS VALVE

Next: p2938, !f2937

INJECTOR

REMOVE THE GAS VALVE

Next: !p2940, !f2939

RESISTANCE SPARK GENERATOR (RECTIFICATION)

REMOVE WIRES FROM SPARK GENERATOR

Next: p1260, !f2945

RESISTANCE HARNESS INSTALLER INTERFACE TO PCB

GAIN ACCESS TO THE ELECTRIC INTERFACE HOUSING
DISCONNECT X10 FROM THE PCB

Next: !p2947, !f2948

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p2337, f2971

FAN HARNESS CONTINUITY

UNPLUG THE HARNESS FROM THE FAN AND X20 AT THE PCB

Next: !p298, !f321

ELECTRODE

Next: p1258, !f2982

VOLTAGE TO INTERFACE PCB

REMOVE THE INTERFACE HARNESS PLUG FROM X51 OF THE PCB

Next: p3064, !f3065

INTERFACE HARNESS CONTINUITY

REMOVE THE HARNESS FROM THE INTERFACE PCB AND X51 AT THE PCB

Next: !p3066, !f3067

P1 PRESSURE

ATTACH A U-GAUGE TO THE P1 TEST POINT OF THE GAS VALVE

Next: p3114, !f3115

THROTTLE

USING A 2.5MM ALLEN

Next: !p3116, !f3117

GAS VALVE HARNESS CONTINUITY

REMOVE THE PLUG FROM THE GAS VALVE
DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p3123, !f3125

FAN HARNESS CONTINUITY

UNPLUG THE HARNESS FROM THE FAN AND X20 AT THE PCB

Next: !p323, !f324

FAN VOLTAGE AT PCB G AND B - NO FAN

ACCESS THE X20 CONNE

Next: p2460, f2463

VOLTAGE AT PUMP

REMOVE THE COVER FROM THE PUMP

Next: !p602, f608

BOILER THERMOSTAT SET POINT

Next: p690, f691

BOILER THERMOSTAT SET POINT

Next: p746, f743

INSPECTION HEAT OUTPUT SETTING

Next: p2534, f792

PUMP HARNESS CONTINUITY

GAIN ACCESS TO THE ELECTRIC INTERFACE HOUSING ALSO REMOVE THE X14 PLUG FORM THE RHS OF THE PCB

Next: !p648, !f649

INSPECTION HEAT OUTPUT SETTING

Next: p699, f696

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p700, f701

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p1474, f705

INSPECTION HEAT OUTPUT SETTING

Next: p750, f747

FLOW THERMISTOR AND HARNESS RESISTANCE

UNPLUG CONNECTOR X20 FROM RIGHT HAND SIDE OF PCB

Next: p764, f752

RETURN THERMISTOR AND HARNESS RESISTANCE

DISCONNECT X20 CONNECTOR FROM RHS OF PCB

Next: p2828, f765

System Information

  • Total Tests: 677
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control