XSol Diagnostic System

IDEAL MINI AND RELATED IDEAL VARIANTS (2 PCB)

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

IDEAL MINI AND RELATED MODELS - TWO PCB VERSION

Next: &2263, !f2

OBSERVATION BOILER STANDBY

ENSURE NO DEMAND FOR

Next: &85, ?4, ?6, ?8

OBSERVATION PUMP RUNS

DHW TEMPERATURE SELECTOR SET TO MAX

Next: &84, f65

OBSERVATION FAN RUNS

DHW TEMPERATURE SELECTOR SET TO MAX

Next: &143, f2025

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &87, !f86

OBSERVATION DHW FLOW RATE

Next: &64, f88

OBSERVATION BURNER IGNITION

DHW TEMPERATURE SELECTOR SET TO MAX

Next: &285, ?144, ?187, ?207, ?230

OBSERVATION BOILER RESPONDS TO CH DEMAND

Next: &366, f1151

PRESSURE BURNER MIN

ATTACH PRESSURE GAUG

Next: &1983, ?2100, ?2109

OPERATION DHW

DHW TEMPERATURE SELECTOR SET TO MAX

Next: &783, ?367, ?369, ?371, ?373, ?1684

SEQUENCE OF OPERATION

NO LONGER USED

Next: &nff, !f428

FUSE FURTHER INVESTIGATION

OUTSIDE MODEL

Next: &nff, f925

FAULT CODE 202 - DHW OPERATION

OUTSIDE MODEL

Next: &nff, f581

FAULT CODE 202 - CH OPERATION

OUTSIDE MODEL

Next: &nff, f591

FAULT CODE 220 - FROST PROTECTION

OUTSIDE MODEL

Next: &nff, f618

FAULT CODE 212 - IGNITION LOCKOUT - DUMMY FAULT CODE GOES TO BURNER IGNITION

OUTSIDE MODEL

Next: &nff, !f734

FAULT CODE 210 - PUMP PROVING FAULT

OUTSIDE MODEL

Next: &nff, f843

FAULT CODE 021 - FAULTY DHW THERMISTOR

OUTSIDE MODEL

Next: &nff, f2201

FAULT CODE 022 - FAULTY CH THERMISTOR

OUTSIDE MODEL

Next: &nff, f685

FAULT CODE 002 - EXCESSIVE PRIMARY TEMPERATURE ON DHW OPERATION

OUTSIDE MODEL

Next: &nff, f636

FAULT CODE 111 - PCB FAULT

OUTSIDE MODEL

Next: &nff, f623

OBSERVATION DHW MODULATION

ADJUST DHW FLOW RATE

Next: &784, f894

OPERATION CH

CH TEMPERATURE CONTROL SET TO MAX

Next: &785, ?983, ?985, ?1003

OBSERVATION CH MODULATION

CH TEMPERATURE CONTROL SET TO MAX
ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: &786, f902

OBSERVATION PUMP OVERRUN

Next: &nff, !f1574

FAULT CODE FOR SINGLE PCB

OUTSIDE MODEL

Next: &nff, f1722

ALTERNATIVE FLOW SWITCH TEST TREE

OUTSIDE MODEL

Next: &nff, f1795

PRESSURE BURNER MAXIMUM

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT
DHW TEMPERATURE SELECTOR SET TO MAX

Next: &2001, f2238

PRESSURE IGNITION

{GAINPCBACS}
ATTA

Next: &257, !f2002

FAULT CODE 120 - IGNITION PRESSURE ADJUSTMENT

NOT USED

Next: &nff, f2007

FAULT CODE 211 - MINIMUM PRESSURE ADJUSTMENT

NOT USED

Next: &nff, f2012

INFORMATION ENABLE 3 LED MODE

{GAINPCBACS}

Next: &nff, !f2262

INFORMATION SINGLE OR TRIPLE LED DISPLAY

IF YOU HAVE AN APPLI

Next: &3, !f2264

FAULT CODE 002

CABLE - PUMP

Next: End

OPERATION CH RADS DO NOT HEAT

SYSTEM PRESSURE

Next: End

OPERATION CH RADS DO NOT HEAT

TAP 3/4IN - CH

Next: End

OPERATION CH RADS DO NOT HEAT

MOTOR - WATER PUMP

Next: End

OPERATION CH RADS DO NOT HEAT

CABLE - PUMP

Next: End

OPERATION CH RADS DO NOT HEAT

KIT - DIVERTER VALVE

Next: End

OPERATION CH RADS DO NOT HEAT

KIT - BY-PASS

Next: End

OPERATION CH - RADS COOL

KNOB

Next: End

OPERATION CH - RADS COOL

TEMPERATURE PROBE

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - OPEN CIRCUIT TO EXT CONTROLS

CABLE - POWER SUPPLY & EXT CONTROL

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - WITHOUT INTEGRAL TIMER

CABLE - POWER SUPPLY & EXT CONTROL

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - WITH INTEGRAL TIMER

CABLE - TIME SWITCH

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND

KNOB

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

SWITCH - AIR PRESSURE

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING - OPEN ON APS

CABLE - FAN

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

TUBE (AIR PRESSURE SWITCH)

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

TEST POINT - AIR PRESSURE SWITCH

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

FLUE

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

HEAT EXCHANGER - MAIN

Next: End

OPERATION DHW - DHW COOL RADS COOL

INLET PRESSURE

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH

CABLE - PUMP

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH

MAINS FUSE

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

PCB AND GAS VALVE

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - WITHOUT INTEGRAL TIMER - NO POWER TO EXTERNAL CONTROLS

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - WITOUT INTEGRAL TIMER - IGNORING CH DEMAND

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - TOO COOL RADS HEAT

PCB - ELECTRONIC CONTROL

Next: End

OPERATION CH RADS DO NOT HEAT

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION PUMP OVERRUN

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 202 CH - EXTERNAL CONTROLS

Next: End

FAULT CODE 002 - WILL NOT RESET

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 002 - NO VOLTAGE TO DIVERTER

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 022

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 210 - NO POWER TO PUMP

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 111

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND - EXTERNAL CONTROLS

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH - FAULTY LED

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH - NO POWER TO PUMP

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION PUMP RUNS - IGNORING DHW DEMAND

PCB - ELECTRONIC CONTROL

Next: End

FUSE INVESTIGATION

CABLE - ELECTRONIC CONTROL PCB IGNITION DEVICE

Next: End

FAULT CODE 202 - DHW

CABLE - DHW FLOW SWITCH AND TEMPERATURE PROBE

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND

CABLE - DHW FLOW SWITCH AND TEMPERATURE PROBE

Next: End

OPERATION DHW - NOISY PRIMARY SENSOR

TEMPERATURE PROBE

Next: End

OPERATION DHW - NOISY - RUNNING SLOW

MOTOR - WATER PUMP

Next: End

FAULT CODE 122

HEAT EXCHANGER - MAIN

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH

FUSE 1.6A - DELAYED

Next: End

FAULT CODE - NOT FOR APPLIANCE

Z REDIRECT

Next: End

ALTERNATIVE FLOW SWITCH TEST

CABLE - DHW FLOW SWITCH AND TEMPERATURE PROBE

Next: End

OBSERVATION PUMP RUNS

CABLE - DHW FLOW SWITCH AND TEMPERATURE PROBE

Next: End

ALTERNATIVE FLOW SWITCH TEST

FLOW SWITCH - MAGNETIC

Next: End

FAULT CODE 210 - RUNNING SLOW

MOTOR - WATER PUMP

Next: End

FAULT CODE 210

DIAPHRAGM - PRESSURE SWITCH - CH

Next: End

FAULT CODE 210 SPINDLE SEIZED

DIAPHRAGM - PRESSURE SWITCH - CH

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES

INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES

HEAT EXCHANGER - MAIN

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

ELECTRODE - IGNITION

Next: End

OPERATION DHW - DHW RUNS HOT COLD

MOTOR - WATER PUMP

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

MOTOR - WATER PUMP

Next: End

OPERATION DHW - DHW RUNS HOT COLD

SWITCH - AIR PRESSURE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

TUBE (AIR PRESSURE SWITCH)

Next: End

OPERATION DHW - DHW RUNS HOT COLD

TEST POINT - AIR PRESSURE SWITCH

Next: End

OPERATION DHW - DHW RUNS HOT COLD

FLUE

Next: End

OPERATION DHW - DHW RUNS HOT COLD - CUTS OUT

HEAT EXCHANGER - MAIN

Next: End

OPERATION DHW - DHW RUNS HOT COLD

THERMOSTAT 105DEG C - OVERHEAT

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

PRESSURE IGNITION

PCB - IGNITION RATE

Next: End

FAULT CODE 120

DIP SWITCH SETTINGS

Next: End

FAULT CODE 211

DIP SWITCH SETTINGS

Next: End

OBSERVATION FAN RUNS

MOTOR - WATER PUMP

Next: End

OBSERVATION FAN RUNS

DIAPHRAGM - PRESSURE SWITCH - CH

Next: End

OBSERVATION FAN RUNS SPINDLE SEIZED

DIAPHRAGM - PRESSURE SWITCH - CH

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

GAS VALVE

Next: End

OBSERVATION FAN RUNS

KIT - MICROSWITCH

Next: End

OBSERVATION FAN RUNS - PRIMARY SENSOR

TEMPERATURE PROBE

Next: End

OBSERVATION FAN RUNS

CABLE - ELECTRONIC CONTROL PCB IGNITION DEVICE

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

INLET PRESSURE

Next: End

OBSERVATION FAN RUNS

FUSE 3 15AF

Next: End

OBSERVATION FAN RUNS

TUBE (AIR PRESSURE SWITCH)

Next: End

OBSERVATION FAN RUNS

VENTURI

Next: End

OBSERVATION FAN RUNS - FAN

CABLE - FAN

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW COOL RADS COOL

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

OPERATION DHW - DHW COOL RADS COOL OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 002

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

FAULT CODE 002 - GAS VALVE VOLTAGE

PCB - ELECTRONIC CONTROL

Next: End

PRESSURE BURNER MAX AND MIN

INLET PRESSURE

Next: End

PRESSURE BURNER MAX AND MIN - MINIMUM OUT

GAS VALVE

Next: End

PRESSURE MIN

Z REDIRECT

Next: End

PRESSURE BURNER MIN

ELECTRODE - IGNITION

Next: End

PRESSURE BURNER MIN

BURNER

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

BURNER

Next: End

OBSERVATION BURNER IGNITION - NO IGNITION

THERMOSTAT 105DEG C - OVERHEAT

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

ELECTRODE - DETECTION

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

CABLE - FLAME DETECTION ELECTRODE

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

BURNER

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING - NO RECT VOLTAGE

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING - SHORTING TO EARTH

ELECTRODE - DETECTION

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

ELECTRODE - IGNITION

Next: End

OPERATION DHW - DHW RUNS HOT COLD PRIMARY SENSOR

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER - MAIN

Next: End

OPERATION DHW - DHW RUNS HOT COLD PRIMARY SENSOR DROPPING OUT

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

HEAT EXCHANGER - MAIN

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

BURNER

Next: End

FAULT CODE 002

HEAT EXCHANGER - MAIN

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - LOW PRESSURE

INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - NO PRESSURE

INLET PRESSURE

Next: End

FAULT CODE 002 - DHW SENSOR - CUTS OUT

TEMPERATURE PROBE

Next: End

FAULT CODE 002 - DHW SENSOR - DOES NOT MODULATE

TEMPERATURE PROBE

Next: End

FAULT CODE 021 - DHW SENSOR

TEMPERATURE PROBE

Next: End

FAULT CODE 021

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION DHW MODULATION - DHW SENSOR

TEMPERATURE PROBE

Next: End

OBSERVATION FAN RUNS - DHW SENSOR

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW TOO COOL DHW SENSOR

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW TOO HOT DHW SENSOR

TEMPERATURE PROBE

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - LOW PRESSURE

GAS VALVE

Next: End

PRESSURE BURNER MAX - DHW SENSOR

TEMPERATURE PROBE

Next: End

PRESSURE BURNER MAX

KNOB

Next: End

PRESSURE BURNER MAXIMUM

INLET PRESSURE

Next: End

PRESSURE BURNER MAXIMUM

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

PRESSURE BURNER MAXIMUM

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW RUNS HOT COLD DHW SENSOR DROPPING OUT

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW RUNS HOT COLD DHW SENSOR

TEMPERATURE PROBE

Next: End

FAULT CODE 220

PCB - ELECTRONIC CONTROL

Next: End

INFORMATION ENABLE 3 LED MODE

Z REDIRECT

Next: End

INFORMATION SINGLE OR TRIPLE LED

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

CABLE - PUMP

Next: End

OBSERVATION BOILER STANDBY - FAULT CODES 2

Z REDIRECT

Next: End

OPERATION DHW - DHW TOO HOT

KNOB

Next: End

OPERATION DHW - DHW TOO COOL

KNOB

Next: End

OPERATION DHW - DHW TOO COOL

MOTOR - WATER PUMP

Next: End

SEQUENCE OF OPERATION

Z REDIRECT

Next: End

OBSERVATION BOILER SELF CHECK - PUMP RUNS WITH NO DEMAND

OPEN TAP OR LEAK

Next: End

OBSERVATION RESET CLOCK

Z REDIRECT

Next: End

OBSERVATION BOILER SELF CHECK - PUMP RUNS WITH NO DEMAND

CLOCK BATTERY

Next: End

OBSERVATION BOILER SELF CHECK - PUMP RUNS WITH NO DEMAND

CABLE - TIME SWITCH

Next: End

OBSERVATION DHW FLOW RATE

TAP 1/2IN - DHW

Next: End

OBSERVATION PUMP RUNS

CABLE - PUMP

Next: End

FAULT CODE 202 DHW

OPEN TAP OR LEAK

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND

FROST PROTECTION

Next: End

FAULT CODE 202 CH

Z REDIRECT

Next: End

FAULT CODE 202 CH

CLOCK BATTERY

Next: End

FAULT CODE 202 CH

CABLE - TIME SWITCH

Next: End

FAULT CODE 220

FROST PROTECTION

Next: End

FAULT CODE 220 - PRIMARY SENSOR

TEMPERATURE PROBE

Next: End

OBSERVATION BOILER STANDBY - PRIMARY SENSOR - PUMP RUNS WITH NO DEMAND

TEMPERATURE PROBE

Next: End

FAULT CODE 002 - PRIMARY SENSOR - WILL NOT RESET

TEMPERATURE PROBE

Next: End

FAULT CODE 002

MOTOR - WATER PUMP

Next: End

FAULT CODE 002

INLET PRESSURE

Next: End

FAULT CODE 212

Z REDIRECT

Next: End

FAULT CODE 022 - PRIMARY SENSOR

TEMPERATURE PROBE

Next: End

FAULT CODE 210

CABLE - PUMP

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

FAULT CODE 210

KIT - MICROSWITCH

Next: End

OPERATION DHW - DHW TOO COOL

HEAT EXCHANGER - MAIN

Next: End

OBSERVATION DHW FLOW RATE

MAINS WATER SUPPLY / TAP

Next: End

OBSERVATION DHW MODULATION

KNOB

Next: End

OBSERVATION CH MODULATION - PRIMARY SENSOR

TEMPERATURE PROBE

Next: End

OBSERVATION CH MODULATION

KNOB

Next: End

OBSERVATION DHW FLOW RATE

FLOW SWITCH - MAGNETIC

Next: End

OBSERVATION BURNER IGNITION NO IGNITION ADJUSTMENT

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION NOT ESTABLISHING ADJUSTMENT

Z REDIRECT

Next: End

FUSE INVESTIGATION - LEAK

ACTUATOR AND KIT - DIVERTER VALVE

Next: End

FUSE INVESTIGATION

ACTUATOR - DIVERTER VALVE

Next: End

FUSE INVESTIGATION - SHORT CIRCUIT

MOTOR - WATER PUMP

Next: End

FUSE INVESTIGATION - SHORT CIRCUIT

FAN

Next: End

FUSE INVESTIGATION - SHORT CIRCUIT

GAS VALVE

Next: End

EXCESSIVE SYSTEM PRESSURE

EXPANSION VESSEL

Next: End

OPERATION DHW - TOO COOL RADS HEAT

CABLE - PUMP

Next: End

FAULT CODE 002

ACTUATOR - DIVERTER VALVE

Next: End

OPERATION CH RADS DO NOT HEAT

ACTUATOR - DIVERTER VALVE

Next: End

OPERATION CH RADS DO NOT HEAT

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - WITH INTEGRAL TIMER ILLUMINATED

TIME SWITCH

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

FAN

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

GASKET - FLUE ELBOW

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

VENTURI

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING - CLOGGED

FAN

Next: End

OBSERVATION PUMP RUNS

FLOW SWITCH - MAGNETIC

Next: End

OBSERVATION PUMP RUNS

FLOW SWITCH - DHW

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH - MAINS FUSE

Z REDIRECT

Next: End

OPERATION DHW - DHW COOL

INJECTOR

Next: End

OPERATION DHW - DHW COOL RADS COOL]

GAS VALVE ADJUSTMENT

Next: End

OPERATION DHW - DHW COOL RADS COOL

GAS VALVE

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH - FAULTY LED

Z REDIRECT

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH

MOTOR - WATER PUMP

Next: End

OBSERVATION BURNER IGNITION

PCB AND CABLE - PUMP TO DIVERTER VALVE TO...

Next: End

OBSERVATION BURNER IGNITION - NO IGNITION

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING - WEAK SPARK

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING - NO SPARK

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

OPERATION CH - RADS COOL

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION CH MODULATION

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 202 DHW

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 202 CH - NO EXTERNAL CONTROLS

Next: End

FAULT CODE 210 - IGNORING PUMP PROVING SWITCH

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 210 - NO POWER TO FLOW SWITCH

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND - STUCK ON DHW DEMAND

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND - STUCK IN FROST PROTECTION

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND - NO EXTERNAL CONTROLS

Next: End

OBSERVATION PUMP RUNS - NO POWER TO FLOW SWITCH

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH

CABLE - POWER SUPPLY & EXT CONTROL

Next: End

FURTHER INVESTIGATION

FUSE BLOWN

Next: End

FUSE INVESTIGATION

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

FUSE FURTHER INVESTIGATION - INTERNAL SHORT

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - NOISY

GAUGE - TEMPERATURE PRESSURE

Next: End

OPERATION DHW - NOISY

SYSTEM PRESSURE

Next: End

OPERATION DHW - NOISY

THERMOSTAT 105DEG C - OVERHEAT

Next: End

OPERATION DHW - NOISY

HEAT EXCHANGER - DHW

Next: End

FAULT CODE - NOT FOR APPLIANCE

PCB - ELECTRONIC CONTROL

Next: End

ALTERNATIVE FLOW SWITCH TEST

FLOW SWITCH - DHW

Next: End

FAULT CODE 210

GAUGE - TEMPERATURE PRESSURE

Next: End

FAULT CODE 210

SYSTEM PRESSURE

Next: End

FAULT CODE 210

KIT - FLOW GROUP

Next: End

FAULT CODE 210 SPINDLE SEIZED

KIT - FLOW GROUP

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES

GAS VALVE ADJUSTMENT

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES - MINIMUM OUT

GAS VALVE

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

CABLE - IGNITION ELECTRODE

Next: End

OBSERVATION BOILER STANDBY - STANDBY LED DOES NOT FLASH - PCB FUSE

Z REDIRECT

Next: End

OPERATION DHW - DHW RUNS HOT COLD

GAUGE - TEMPERATURE PRESSURE

Next: End

OPERATION DHW - DHW RUNS HOT / COLD

SYSTEM PRESSURE

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

GAUGE - TEMPERATURE PRESSURE

Next: End

OPERATION DHW - DHW RUNS HOT / COLD DROPPING OUT

SYSTEM PRESSURE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

FAN

Next: End

OPERATION DHW - DHW RUNS HOT COLD

GASKET - FLUE ELBOW

Next: End

OPERATION DHW - DHW RUNS HOT COLD

VENTURI

Next: End

OPERATION DHW - DHW RUNS HOT COLD - CLOGGED

FAN

Next: End

OPERATION DHW - DHW RUNS HOT COLD - BURNER PRESSURE OK

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

FAULT CODE 211

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 120

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION FAN RUNS

GAUGE - TEMPERATURE PRESSURE

Next: End

OBSERVATION FAN RUNS

SYSTEM PRESSURE

Next: End

OBSERVATION FAN RUNS

KIT - FLOW GROUP

Next: End

OBSERVATION FAN RUNS SPINDLE SEIZED

KIT - FLOW GROUP

Next: End

OBSERVATION FAN RUNS - NO POWER TO FLOW SWITCH

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION FAN RUNS - PUMP PROVING MICROSWITCH

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

OBSERVATION FAN RUNS - NO POWER TO FAN

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

OBSERVATION FAN RUNS - APS

CABLE - FAN

Next: End

OBSERVATION FAN RUNS

SWITCH - AIR PRESSURE

Next: End

OBSERVATION FAN RUNS

FAN

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES - MAX OUT RESIST

GAS VALVE

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES - MAX OUT

GAS VALVE

Next: End

OPERATION DHW - DHW COOL RADS COOL - MAX OUT RESIST

GAS VALVE

Next: End

OPERATION DHW - DHW COOL RADS COOL - MAX OUT

GAS VALVE

Next: End

FAULT CODE 002 - MAX OUT RESIST

GAS VALVE

Next: End

FAULT CODE 002 - MAX OUT

GAS VALVE

Next: End

PRESSURE BURNER MAX AND MIN

GAS VALVE ADJUSTMENT

Next: End

PRESSURE BURNER MIN

INJECTOR

Next: End

OBSERVATION BURNER IGNITES - IGNITES BUT BAFFLES

GASKET - FLUE ELBOW

Next: End

OBSERVATION BURNER IGNITES - IGNITES BUT BAFFLES

VENTURI

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT BAFFLES - CLOGGED

FAN

Next: End

OBSERVATION BURNER IGNITES - IGNITES BUT BAFFLES

FLUE

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING - OPEN TO OVERHEAT

CABLE - FAN

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING - IGNORING RECT VOLTAGE

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

INJECTOR

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING - SHORTING TO EARTH

CABLE - FLAME DETECTION ELECTRODE

Next: End

OPERATION DHW - DHW RUNS HOT COLD - MODULATING INCORRECTLY

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER - DHW

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

INJECTOR

Next: End

OPERATION DHW - DHW RUNS HOT COLD - CUTTING POWER TO IGN PCB

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

HEAT EXCHANGER - DHW

Next: End

FAULT CODE 002 - DISPLAYING AT LOW TEMP

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 002

HEAT EXCHANGER - DHW

Next: End

FAULT CODE 002 - NOT MODULATING ON DHW SENSOR

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 021

CABLE - DHW FLOW SWITCH AND TEMPERATURE PROBE

Next: End

FAULT CODE 021

Z REDIRECT

Next: End

OBSERVATION DHW MODULATION

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION FAN RUNS - NO POWER TO IGNITION PCB

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW TOO COOL

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW TOO HOT

PCB - ELECTRONIC CONTROL

Next: End

PRESSURE BURNER MAXIMUM

GAS VALVE ADJUSTMENT

Next: End

PRESSURE BURNER MAXIMUM - MINIMUM OUT

GAS VALVE

Next: End

PRESSURE BURNER MAXIMUM - MAX OUT RESIST

GAS VALVE

Next: End

PRESSURE BURNER MAXIMUM - MAX OUT

GAS VALVE

Next: End

FAULT CODE 220

Next: End

OBSERVATION BOILER STANDBY - FAULT CODES 1

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - NO PRESSURE

GAS VALVE

Next: End

OPERATION DHW - DHW TOO COOL

GAUGE - TEMPERATURE PRESSURE

Next: End

OPERATION DHW - DHW TOO COOL

SYSTEM PRESSURE

Next: End

OPERATION DHW - DHW TOO COOL

HEAT EXCHANGER - DHW

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - WITH INTEGRAL TIMER BLANK

TIME SWITCH

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND

TIME SWITCH

Next: End

OBSERVATION PUMP RUNS

MOTOR - WATER PUMP

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND

FLOW SWITCH - DHW

Next: End

FAULT CODE 202 DHW

FLOW SWITCH - MAGNETIC

Next: End

FAULT CODE 202 DHW

FLOW SWITCH - DHW

Next: End

FAULT CODE 202 CH - WITH INTEGRAL TIMER BLANK

TIME SWITCH

Next: End

FAULT CODE 202 CH - PUMP RUNS WITH NO DEMAND

TIME SWITCH

Next: End

FAULT CODE 202 CH

Next: End

FAULT CODE 111

Z REDIRECT

Next: End

FAULT CODE 002

GAS VALVE ADJUSTMENT

Next: End

FAULT CODE 002 - MINIMUM OUT

GAS VALVE

Next: End

FAULT CODE 002

NO FAULT FOUND

Next: End

FAULT CODE 022

Z REDIRECT

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND

FLOW SWITCH - MAGNETIC

Next: End

FAULT CODE 022

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

FAULT CODE 210 - NOT RUNNING

MOTOR - WATER PUMP

Next: End

FAULT CODE 210

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

OBSERVATION DHW FLOW RATE

HEAT EXCHANGER - DHW

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - LOW PRESSURE

GAS VALVE ADJUSTMENT

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

GAS VALVE ADJUSTMENT

Next: End

FUSE INVESTIGATION - SHORT TO DIVERTER VALVE

CABLE - PUMP

Next: End

FUSE INVESTIGATION - SHORT CIRCUIT TO PUMP

CABLE - PUMP

Next: End

FUSE INVESTIGATION - SHORT CIRCUIT TO FAN

CABLE - FAN

Next: End

FUSE INVESTIGATION - SHORT CIRCUIT TO GAS VALVE

CABLE - PUMP

Next: End

EXCESSIVE SYSTEM PRESSURE

PIPE - CONNECTION - EXPANSION VESSEL

Next: End

OPERATION DHW - TOO COOL RADS HEAT

ACTUATOR - DIVERTER VALVE

Next: End

OPERATION DHW - TOO COOL RADS HEAT

KIT - DIVERTER VALVE

Next: End

FAULT CODE 002

KIT - DIVERTER VALVE

Next: End

BOILER REACHES TEMPERATURE RADIATORS DO NOT HEAT SUFFICIENTLY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1004

NO SPARKING OBSERVED

CHARACTERISTIC TEST FROM OBSERVATION SPARKING AT PCB

Next: p1233

SPARKING PRESENT BUT WEAK OR INTERMITTENT

CHARACTERISTIC TEST FROM OBSERVATION SPARKING AT PCB

Next: !p1539

FAN OUTLET SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1253

FAN VENTURI DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1255

FAN CLOGGED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1257

VOLTAGE AS ABOVE ON TEST 1 BUT WRONG ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE FLOW SWITCH AT PCB

Next: p1264

VOLTAGE ABSENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE PUMP PROVING SWITCH AT PCB

Next: !p1597

PRESSURE REACHES MAXIMUM BUT THEN MODULATES DOWN

CHARACTERISTIC TEST FROM PRESSURE BURNER MAXIMUM (CONSTANT)

Next: p2214

PRESSURE NEVER REACHES MAXIMUM

CHARACTERISTIC TEST FROM PRESSURE BURNER MAXIMUM (CONSTANT)

Next: p1411

UNABLE TO SET MINIMUM PRESSURE CORRECTLY

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: !p1417

MINIMUM SET CORRECTLY BUT UNABLE TO SET MAXIMUM

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: p2086

NO SPARKING PRESENT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p145

BOILER NOISY, KETTLES OR GOES TO LOCKOUT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1685

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1689

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1691

SPINDLE ALREADY EXTENDED BEFORE PUMP RUNS

CHARACTERISTIC TEST FROM OBSERVATION PUMP PROVING SPINDLE

Next: p1835

SPINDLE DOES NOT EXTEND AND FULLY ENGAGE MICROSWITCH

CHARACTERISTIC TEST FROM OBSERVATION PUMP PROVING SPINDLE

Next: p1825

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1828

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1830

UNABLE TO SET MINIMUM PRESSURE CORRECTLY

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: !p1848

MINIMUM SET CORRECTLY BUT UNABLE TO SET MAXIMUM

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: p2072

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p188

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1922

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1924

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1942

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1944

FAN OUTLET SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1974

FAN VENTURI DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1976

FAN CLOGGED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1978

SPINDLE ALREADY EXTENDED BEFORE PUMP RUNS

CHARACTERISTIC TEST FROM OBSERVATION PUMP PROVING SPINDLE

Next: p2030

SPINDLE DOES NOT EXTEND AND FULLY ENGAGE MICROSWITCH

CHARACTERISTIC TEST FROM OBSERVATION PUMP PROVING SPINDLE

Next: p2032

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p2035

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p2037

VOLTAGE PRESENT ON TEST 1 BUT DOES NOT DROP ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE PUMP PROVING SWITCH AT PCB

Next: p2047

VOLTAGE ABSENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE PUMP PROVING SWITCH AT PCB

Next: !p2049

SPARKING PRESENT BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p208

PRESSURE PRESENT BUT LOW

CHARACTERISTIC TEST FROM OBSERVATION SPARKING AT PCB

Next: p211

MINIMUM PRESSURE INCORRECT

CHARACTERISTIC TEST FROM PRESSURE BURNER MIN

Next: p2102

MINIMUM PRESSURE OK BUT NOW BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM PRESSURE BURNER MIN

Next: p2111

PRESSURE REMAINS AT 0MBAR

CHARACTERISTIC TEST FROM OBSERVATION SPARKING AT PCB

Next: p213

FAN OUTLET SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p2122

FAN VENTURI DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p2124

FAN CLOGGED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p2126

VOLTAGE ABSENT

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p2135

VOLTAGE PRESENT BUT DOES NOT DROP

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p2137

UNABLE TO SET MINIMUM PRESSURE CORRECTLY

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: !p2248

MINIMUM SET CORRECTLY BUT UNABLE TO SET MAXIMUM

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: p2250

BURNER IGNITES BUT BAFFLES AND/OR FLAME LIFTS OFF

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p1840

DHW COOL, RADIATORS REMAIN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p368

DHW COOL, RADIATORS BEGIN TO HEAT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p912

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p372

DHW RUNS HOT / COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1872

NO LEDS ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p5

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p407

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p409

NO EXTERNAL CONTROLS FITTED AND INTEGRAL TIMER DISPLAY IS ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p449

NO EXTERNAL CONTROLS FITTED AND INTEGRAL TIMER DISPLAY IS BLANK

CHARACTERISTIC TEST FROM OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p443

PUMP DOES NOT RUN ON EITHER TEST

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS (NO DEMAND)

Next: p49

PUMP RUNS ON TEST 1

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS (NO DEMAND)

Next: p58

NO EXTERNAL CONTROLS FITTED AND INTEGRAL TIMER DISPLAY IS ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p594

NO EXTERNAL CONTROLS FITTED AND INTEGRAL TIMER DISPLAY IS BLANK

CHARACTERISTIC TEST FROM OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p596

ADDITIONAL LIGHTS FLASHING OR ILLUMINATED / FAULT CODE SHOWING

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p7

CH FLOW PIPE BEGINS TO HEAT

CHARACTERISTIC TEST FROM OPERATION DHW (FAULT CODE)

Next: p644

BURNER CUTS OUT AND/OR FAULT CODE REAPPEARS

CHARACTERISTIC TEST FROM OPERATION DHW (FAULT CODE)

Next: p646

UNABLE TO SET MINIMUM PRESSURE CORRECTLY

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: !p673

MINIMUM SET CORRECTLY BUT UNABLE TO SET MAXIMUM

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: p2093

PUMP RUNS WITH NO DEMAND OR BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p9

VOLTAGE PRESENT ON TEST 1 BUT DOES NOT DROP ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE PUMP PROVING SWITCH AT PCB

Next: p864

VOLTAGE ABSENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE PUMP PROVING SWITCH AT PCB

Next: !p1589

BOILER AND RADIATOR TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p984

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p986

27/08/2021 10:20:47 2108_1_50_1 23/09/2021 09:51:00

15/09/2021 13:26:03

Next: End

VOLTAGE MAINS IN AT CONNECTOR

{GAINPCBACS}

Next: !p16, f11

VOLTAGE DIVERTER VALVE CH AT PCB

{GAINPCBACS}

Next: p1013, !f1572

RESISTANCE FUSE (MAINS)

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p13, f12

INSPECTION CH POTENTIOMETER

{GAINPCBACS}

Next: p1167, !f1182

RESISTANCE HARNESS X1 TO EXTERNAL CONTROLS BLOCK

DISCONNECT CONNECTOR J1 FROM THE CONTROL PCB

Next: !p1170, !f1171

FURTHER INVESTIGATION MAINS FUSE

Next: !p14, !f15

RESISTANCE HARNESS AIR PRESSURE SWITCH

DISCONNECT CONNECTOR

Next: !p1540, !f1239

RESISTANCE HARNESS FLOW SWITCH

DISCONNECT CONNECTOR FROM FLOW SWITCH
DISCONNECT CONNECTOR X6 FROM THE CONTROL PCB

Next: !p1267, !f1800

VOLTAGE PUMP AT PCB (BOTH DEMANDS)

Next: p1436, !f1596

RESISTANCE OVERHEAT CIRCUIT

DISCONNECT CONNECTOR J2 FROM THE IGNITION PCB
ENSURE APPLIANCE IS COOL

Next: p1532, f2129

RESISTANCE GAS VALVE AT GAS VALVE

DISCONNECT LEAD FROM GAS VALVE

Next: !p1535, !f1536

INSPECTION HARNESS CONTROL PCB TO IGNITION PCB

{GAINPCBACS}

Next: !p1659, !f1679

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p1698, !f1699

OBSERVATION CONFIRM PCB TYPE

{GAINPCBACS}

Next: !p1724, !f1725

RESISTANCE HARNESS FLOW SWITCH

DISCONNECT CONNECTOR FROM FLOW SWITCH
DISCONNECT CONNECTOR X6 FROM THE CONTROL PCB

Next: p1799, !f1792

FURTHER INVESTIGATION PCB FUSE

Next: !p19, !f1719

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p1843, !f1844

VOLTAGE CONTROL PCB DEMAND TO IGNITION PCB (CONSTANT)

{GAINPCBACS}

Next: p1938, f1939

INSPECTION PRESSURE SYSTEM

Next: p1940, ?1941, ?1943

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT WIRES AND

Next: p1959, !f1960

INSPECTION DIP SWITCHES

{GAINPCBACS}

Next: !p2017, !f2009

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p203, !f206

INSPECTION DIP SWITCHES

{GAINPCBACS}

Next: !p2015, !f2016

VOLTAGE CONTROL PCB DEMAND TO IGNITION PCB

{GAINPCBACS}

Next: p2026, f2027

OBSERVATION PUMP PROVING SPINDLE

Next: p2028, ?2029, ?2031

RESISTANCE FUSE (IGNITION PCB)

REMOVE INTERNAL FUSE FROM IGNITION PCB (BOTTOM LEFT OF PCB)

Next: p2060, !f2061

RESISTANCE AIR PRESSURE SWITCH (NORMALLY CLOSED)

DISCONNECT WIRES FROM AIR PRESSURE SWITCH

Next: !p2064, f2065

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p2066, !f2067

RESISTANCE HARNESS GAS VALVE MODUREG

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: !p2075, !f2076

RESISTANCE HARNESS GAS VALVE MODUREG

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: !p2089, !f2090

RESISTANCE HARNESS GAS VALVE MODUREG

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: !p2096, !f2097

RESISTANCE OVERHEAT THERMOSTAT

GAIN ACCESS TO INNER

Next: !p2130, !f2131

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p2155, !f2156

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p2164, !f2165

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p2170, !f2171

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: !p2199, !f2200

RESISTANCE SENSOR DHW AND HARNESS

DISCONNECT CONNECTOR J6 FROM THE CONTROL PCB

Next: p2202, f2203

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: !p2204, !f2205

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: p2239, !f2240

RESISTANCE HARNESS GAS VALVE MODUREG

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: !p2253, !f2254

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p414, !f870

RESISTANCE HARNESS FLOW SWITCH (OPEN CIRCUIT)

DISCONNECT THE FLOW

Next: !p56, !f1683

INSPECTION HARNESS CLOCK

REMOVE CLOCK HARNESS FROM PCB

Next: !p453, !f454

OBSERVATION ISOLATE DHW

ISOLATE COLD MAINS SUPPLY TO APPLIANCE BY TURNING THE BLUE ISOLATION VALVE 90° CLOCKWISE

Next: p582, !f583

OBSERVATION DISCONNECT FLOW SWITCH

LIFT THE FLOW SWITCH AWAY FROM ITS HOUSING AND MAKE SAFE

Next: !p586, f587

RESISTANCE HARNESS FLOW SWITCH (OPEN CIRCUIT)

DISCONNECT THE FLOW

Next: !p588, !f1682

OBSERVATION ARE EXTERNAL CONTROLS FITTED

DOES THE SYSTEM HAVE

Next: p592, ?593, ?595

INSPECTION HARNESS CLOCK

REMOVE CLOCK HARNESS FROM PCB

Next: !p603, !f604

TEMPERATURE AMBIENT

Next: p619, !f620

OBSERVATION BOILER RESET - PCB FAULT

Next: !p624, !f1590

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p637, !f638

VOLTAGE FLOW SWITCH AT PCB

{GAINPCBACS}

Next: p482, ?1260, ?1262

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p668, !f669

RESISTANCE SENSOR PRIMARY AND HARNESS

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: p686, f687

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p779, !f782

OBSERVATION DISCONNECT FLOW SWITCH

LIFT THE FLOW SWITCH AWAY FROM ITS HOUSING AND MAKE SAFE

Next: !p74, f43

OBSERVATION PUMP RUNS (FAULT CODE)

DHW TEMPERATURE SELECTOR SET TO MAX
CH TEMPERATURE SELECTOR SET TO MAX

Next: p844, f845

VOLTAGE PUMP AT PCB (BOTH DEMANDS)

Next: p846, !f1587

OBSERVATION MAINS WATER FLOW RATE

TURN COLD WATER TAP ON

Next: p455, !f89

INSPECTION DHW POTENTIOMETER

{GAINPCBACS}

Next: p2208, !f896

INSPECTION CH POTENTIOMETER

{GAINPCBACS}

Next: p906, !f909

INSPECTION DIVERTER VALVE ACTUATOR

REMOVE DIVERTER VALV

Next: p926, !f927

RESISTANCE DIVERTER VALVE ACTUATOR AND HARNESS

DISCONNECT CONNECTOR J3 FROM THE CONTROL PCB

Next: !p1678, f931

RESISTANCE DIVERTER VALVE ACTUATOR

REMOVE DIVERTER VALVE ACTUATOR AND DISCONNECT ELECTRICAL CONNECTOR

Next: !p932, !f933

RESISTANCE PUMP

REMOVE PLUG FROM TOP OF PUMP

Next: !p936, !f937

RESISTANCE FAN

DISCONNECT WIRES TO THE FAN

Next: !p940, !f941

RESISTANCE GAS VALVE SOLENOIDS WITH EARTH CHECK

DISCONNECT LEAD FROM GAS VALVE

Next: !p944, !f945

VOLTAGE DIVERTER VALVE DHW AT PCB

{GAINPCBACS}

Next: p991, !f1560

VOLTAGE DIVERTER VALVE DHW AT PCB

{GAINPCBACS}

Next: p999, !f1580

INSPECTION SYSTEM VENTED

Next: p1005, !f1006

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1007, !f1008

LIMPET TEST

Next: p1009, !f1010

OBSERVATION DIVERTER VALVE MOVEMENT (CH)

REMOVE DIVERTER VALV

Next: p1011, f1012

INSPECTION DIVERTER VALVE SPINDLE

REMOVE DIVERTER VALV

Next: p1017, !f1018

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT CONNECTOR J3 FROM THE CONTROL PCB

Next: !p1015, !f1016

TEMPERATURE DIFFERENTIAL INTERNAL BYPASS

ENSURE RADIATORS ARE

Next: !p1019, !f1020

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p1571, !f1024

OBSERVATION LINK EXTERNAL CONTROLS

{GAINPCBACS}
DISC

Next: p1168, f1169

RESISTANCE HARNESS X1 TO EXTERNAL CONTROLS BLOCK

DISCONNECT CONNECTOR J1 FROM THE CONTROL PCB

Next: p1174, !f1175

OBSERVATION IS INTERNAL CLOCK FITTED

IS AN INTEGRAL CLOCK FITTED TO THE BOILER?

Next: p1176, !f1557

OBSERVATION DISCONNECT CLOCK

DISCONNECT CONNECTOR J4 FROM THE CONTROL PCB

Next: p1178, !f1558

INSPECTION HARNESS CLOCK

REMOVE CLOCK HARNESS FROM PCB

Next: !p1180, !f1181

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT WIRES AND

Next: p1234, !f1235

OBSERVATION SPARKING WITH APS PROVEN

APS TEST KIT STILL C

Next: p1236, f1237

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p1240, !f1241

INSPECTION TEST POINT

Next: p1242, !f1243

INSPECTION FLUE

Next: p1244, !f1245

INSPECTION HEAT EXCHANGER

GAIN ACCESS TO PRIMARY HEAT EXCHANGER

Next: p1246, !f1247

INSPECTION VENTURI AND FAN SEALS

REMOVE FAN FROM APPLIANCE
(WILL REQUIRE REMOVAL OF HOOD IF ACCESS TO RIGHT OF APPLIANCE IS POOR)

Next: !p1248, ?1252, ?1254, ?1256

OBSERVATION PUMP RUNS WITH FLOW SWITCH MADE

UNCLIP THE FLOW SWITCH FROM ITS HOUSING AND
WEDGE IT ABOVE THE PRESSURE GAUGE AS SHOWN

Next: !p1265, f1266

PRESSURE BURNER MAXIMUM (CONSTANT)

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT
DHW TEMPERATURE SELECTOR SET TO MAX

Next: !p1407, ?1408, ?1410

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p1412, !f1413

ADJUSTMENT PRESSURE MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: !p1414, ?1416, ?1418

INFORMATION FAULTY LED

TESTS CARRIED OUT HA

Next: p1432, !f1595

OBSERVATION PUMP RUNS (BOTH DEMANDS)

DHW TEMPERATURE SELECTOR SET TO MAX
CH TEMPERATURE SELECTOR SET TO MAX

Next: !p1434, f1435

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR AT TOP OF PUMP

Next: !p1438, !f1439

OBSERVATION SPARKING AT PCB

REMOVE THE LOWER SPA

Next: p184, ?1229, ?1231

RESISTANCE GAS VALVE AT PCB

DISCONNECT CONNECTOR J3 FROM THE IGNITION PCB

Next: !p1537, f1534

RESISTANCE IGNITION PCB

DISCONNECT CONNECTOR J2 FROM THE CONTROL PCB

Next: !p1658, f1657

INSPECTION PRESSURE SYSTEM

Next: p1686, ?1688, ?1690

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1692, !f1693

LIMPET TEST

Next: p1694, !f1695

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: !p1696, f1697

RESISTANCE FUSE (CONTROL PCB)

REMOVE INTERNAL FUSE FROM CONTROL PCB (LEFT OF TRANSFORMER)

Next: p1431, f18

INSPECTION DHW FILTER

ISOLATE AND DRAIN DHW CIRCUIT
REMOVE GAS VALVE
REMOVE FLOW SWITCH FROM ITS HOUSING

Next: !p1801, !f1802

INSPECTION PRESSURE SYSTEM

Next: p1826, ?1827, ?1829

LIMPET TEST

Next: p1831, !f1832

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p1833, !f1834

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p1836, !f1837

INSPECTION SPARK ELECTRODES

GAIN ACCESS TO BURNER

Next: !p185, !f186

PRESSURE BURNER MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT
DHW TEMPERATURE SELECTOR SET TO MAX

Next: p1841, f1842

INSPECTION HEAT EXCHANGER

GAIN ACCESS TO PRIMARY HEAT EXCHANGER

Next: p2117, !f1856

ADJUSTMENT PRESSURE MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: !p1845, ?1847, ?1849

OBSERVATION DOES BURNER REMAIN LIT

Next: p1873, f1937

INSPECTION PRESSURE SYSTEM

Next: p1919, ?1921, ?1923

PRESSURE IGNITION (FAULT)

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p2132, f201

LIMPET TEST

Next: p2220, !f1926

VOLTAGE APS NORMALLY OPEN (CONSTANT)

Next: p1957, f1958

LIMPET TEST

Next: p2229, !f1946

VOLTAGE OVERHEAT STAT (CONSTANT)

Next: !p1981, !f1982

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p1961, !f1962

INSPECTION TEST POINT

Next: p1963, !f1964

INSPECTION FLUE

Next: p1965, !f1966

INSPECTION HEAT EXCHANGER

GAIN ACCESS TO PRIMARY HEAT EXCHANGER

Next: p1967, !f1968

INSPECTION VENTURI AND FAN SEALS

REMOVE FAN FROM APPLIANCE
(WILL REQUIRE REMOVAL OF HOOD IF ACCESS TO RIGHT OF APPLIANCE IS POOR)

Next: !p1969, ?1973, ?1975, ?1977

OBSERVATION DISCONNECT EXTERNAL CONTROLS

{GAINPCBACS}
DISC

Next: !p2259, !f2260

INSPECTION HARNESS CONTROL PCB TO IGNITION PCB

{GAINPCBACS}

Next: p2056, !f2057

VOLTAGE PUMP PROVING SWITCH AT PCB

{GAINPCBACS}
HOT WATER TAP OFF

Next: p2044, ?2046, ?2048

ADJUSTMENT PRESSURE MIN FOR BURNER ESTABLISH

ATTACH PRESSURE GAUG

Next: p922, !f205

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p2042, !f2043

INSPECTION PRESSURE SYSTEM

Next: p2033, ?2034, ?2036

LIMPET TEST

Next: p2038, !f2039

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p2040, !f2041

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p2211, !f2053

RESISTANCE PUMP PROVING MICROSWITCH AT MICROSWITCH

REMOVE THE MICROSWITCH FROM ITS HOUSING AND DISCONNECT WIRES FROM PUMP PROVING MICROSWITCH

Next: !p2050, !f2051

VOLTAGE FAN AT PCB

Next: p2058, f2059

RESISTANCE HARNESS FAN

DISCONNECT CONNECTOR J2 FROM THE IGNITION PCB
DISCONNECT WIRES FROM FAN

Next: !p2070, !f2071

RESISTANCE AIR PRESSURE SWITCH AT PCB (NORMALLY CLOSED)

{GAINPCBACS}
DISCONNECT CONNECTOR J2 FROM THE IGNITION PCB

Next: !p2062, f2063

INSPECTION FAN VENTURI

REMOVE FAN FROM APPLIANCE
(WILL REQUIRE REMOVAL OF HOOD IF ACCESS TO RIGHT OF APPLIANCE IS POOR)

Next: !p2068, !f2069

RESISTANCE GAS VALVE MODUREG AT PCB

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: p2073, f2074

VOLTAGE GAS VALVE MODUREG MAXIMUM AT PCB

{GAINPCBACS}

Next: !p2077, !f2078

PRESSURE IGNITION (FAULT)

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p209, ?210, ?212

RESISTANCE GAS VALVE MODUREG AT PCB

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: p2087, f2088

VOLTAGE GAS VALVE MODUREG MAXIMUM AT PCB

{GAINPCBACS}

Next: !p2091, !f2092

INSPECTION SPARK ELECTRODES

GAIN ACCESS TO BURNER

Next: p214, !f215

RESISTANCE GAS VALVE MODUREG AT PCB

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: p2094, f2095

VOLTAGE GAS VALVE MODUREG MAXIMUM AT PCB

{GAINPCBACS}

Next: !p2098, !f2099

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p2103, !f2104

ADJUSTMENT PRESSURE MIN

ATTACH PRESSURE GAUG

Next: p2105, !f2106

OBSERVATION ADDITIONAL FAULT MINIMUM PRESSURE

NOW THAT THE BURNER

Next: !p2107, !f2108

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p220, !f218

INSPECTION SPARK ELECTRODES

GAIN ACCESS TO BURNER

Next: p2112, !f2113

INSPECTION BURNER

GAIN ACCESS TO BURNER

Next: !p2114, !f2115

INSPECTION VENTURI AND FAN SEALS

REMOVE FAN FROM APPLIANCE
(WILL REQUIRE REMOVAL OF HOOD IF ACCESS TO RIGHT OF APPLIANCE IS POOR)

Next: p2118, ?2121, ?2123, ?2125

INSPECTION BURNER

GAIN ACCESS TO BURNER

Next: !p2127, !f2128

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p223, !f219

VOLTAGE RECTIFICATION CIRCUIT

{GAINPCBACS}

Next: !p2133, ?2134, ?2136

VOLTAGE RECTIFICATION CIRCUIT WITHOUT LEAD

{GAINPCBACS}
DISCONNECT THE FLAME SENSE LEAD FROM THE IGNITION PCB

Next: p2144, !f2145

INSPECTION RECTIFICATION ELECTRODE

GAIN ACCESS TO BURNER
DISCONNECT INLINE CONNECTOR TO THE RECTIFICATION ELECTRODE

Next: p2138, !f2139

RESISTANCE RECTIFICATION LEAD

DISCONNECT FLAME SEN

Next: p2140, !f2141

INSPECTION BURNER

GAIN ACCESS TO BURNER

Next: !p216, !f217

INSPECTION BURNER

GAIN ACCESS TO BURNER

Next: !p2142, !f2143

INSPECTION RECTIFICATION ELECTRODE (SHORT)

GAIN ACCESS TO BURNER

Next: !p2146, !f2147

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p2151, !f2152

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: !p2153, f2154

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p2160, !f2161

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: !p2162, f2163

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: !p2168, f2169

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: p2167, !f2197

ADJUSTMENT PRESSURE MIN FOR BURNER IGNITION

ATTACH PRESSURE GAUG

Next: p919, !f222

OBSERVATION BOILER RESET - SENSOR FAULT

ENSURE BOILER IS COOL

Next: !p2206, !f2207

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: !p2209, !f2210

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: !p2212, !f2213

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: !p2215, !f2216

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: !p2218, !f2219

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: p2150, !f2258

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR

Next: p2159, !f2257

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p224, f1526

INSPECTION DHW POTENTIOMETER

{GAINPCBACS}

Next: p2241, !f2242

RESISTANCE HARNESS GAS VALVE

DISCONNECT CONNECTOR AT GAS VALVE

Next: !p300, !f229

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
ENSURE APPLIANCE IS COOL

Next: p2243, !f2244

ADJUSTMENT PRESSURE MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: !p2245, ?2247, ?2249

RESISTANCE GAS VALVE MODUREG AT PCB

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: p2251, f2252

VOLTAGE GAS VALVE MODUREG MAXIMUM AT PCB

{GAINPCBACS}

Next: !p2255, !f2256

VOLTAGE FLOW SWITCH AT PCB (NO DEMAND)

{GAINPCBACS}
ENSURE NO DEMANDS

Next: !p1591, f70

INSPECTION DHW POTENTIOMETER

{GAINPCBACS}

Next: p402, !f403

INSPECTION DHW POTENTIOMETER

{GAINPCBACS}

Next: p2217, !f399

INSPECTION PRESSURE SYSTEM

Next: p404, ?406, ?408

LIMPET TEST

Next: p410, !f411

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: p1406, f413

OBSERVATION ISOLATE DHW

ISOLATE COLD MAINS SUPPLY TO APPLIANCE BY TURNING THE BLUE ISOLATION VALVE 90° CLOCKWISE

Next: p34, !f437

OBSERVATION RESET CLOCK

Next: p446, !f444

VOLTAGE CLOCK BATTERY

UNCLIP AND REMOVE THE BATTERY AT THE BACK OF THE TIMER

Next: !p447, !f448

OBSERVATION DISCONNECT EXTERNAL CONTROLS LINK

{GAINPCBACS}
DISC

Next: !p1594, f452

INSPECTION ISOLATION VALVE DHW

Next: p90, !f459

VOLTAGE PUMP AT PCB

Next: p502, !f1598

OBSERVATION ARE EXTERNAL CONTROLS FITTED

DOES THE SYSTEM HAVE

Next: p50, ?440, ?442

VOLTAGE MAINS IN AT PCB

{GAINPCBACS}

Next: p17, f10

OBSERVATION DISCONNECT EXTERNAL CONTROLS

{GAINPCBACS}
DISC

Next: !p54, !f1593

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR AT TOP OF PUMP

Next: !p503, !f504

TEMPERATURE AMBIENT

Next: p60, !f59

VOLTAGE FLOW SWITCH AT PCB (NO DEMAND)

{GAINPCBACS}
ENSURE NO DEMANDS

Next: !p1575, f585

OBSERVATION DISCONNECT EXTERNAL CONTROLS

{GAINPCBACS}
DISC

Next: !p605, !f1576

OBSERVATION DISCONNECT EXTERNAL CONTROLS LINK

{GAINPCBACS}
DISC

Next: !p1577, f602

OBSERVATION RESET CLOCK

Next: p597, !f598

VOLTAGE CLOCK BATTERY

UNCLIP AND REMOVE THE BATTERY AT THE BACK OF THE TIMER

Next: !p599, !f600

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p1592, !f63

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p2003, !f622

OBSERVATION BOILER RESET - EXCESSIVE TEMP ON DHW OPERATION

ENSURE BOILER IS COOL

Next: p639, !f1579

OPERATION DHW (FAULT CODE)

SET FLOW RATE TO 10 LITRES A MINUTE

Next: p666, ?643, ?645

OBSERVATION DIVERTER VALVE MOVEMENT (DHW)

REMOVE DIVERTER VALV

Next: !p997, f998

LIMPET TEST

Next: p2191, !f653

PRESSURE BURNER MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT
DHW TEMPERATURE SELECTOR SET TO MAX

Next: p680, f667

ADJUSTMENT PRESSURE MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: !p670, ?672, ?674

OBSERVATION DHW MODULATION

ADJUST DHW FLOW RATE

Next: !p681, f2198

OBSERVATION BOILER RESET - SENSOR FAULT

ENSURE BOILER IS COOL

Next: !p688, !f1584

FAULT CODES

PLEASE USE ALL THE T

Next: !p30, !f31

OBSERVATION PUMP PROVING SPINDLE

Next: p850, ?1821, ?1823

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR AT TOP OF PUMP

Next: !p848, !f849

VOLTAGE PUMP PROVING SWITCH AT PCB

{GAINPCBACS}
HOT WATER TAP OFF

Next: !p1588, ?863, ?865

RESISTANCE PUMP PROVING MICROSWITCH AT MICROSWITCH

REMOVE THE MICROSWITCH FROM ITS HOUSING AND DISCONNECT WIRES FROM PUMP PROVING MICROSWITCH

Next: !p867, !f868

OBSERVATION PUMP RUNS (NO DEMAND)

ENSURE NO DEMAND FOR CH OR DHW
SET THE CH TEMPERATURE CONTROL TO 'O' POSITION

Next: p429, ?45, ?47

INSPECTION DHW FILTER

ISOLATE AND DRAIN DHW CIRCUIT
REMOVE GAS VALVE
REMOVE FLOW SWITCH FROM ITS HOUSING

Next: !p92, !f91

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p1573, !f908

OBSERVATION DIVERTER VALVE MOVEMENT (DHW)

REMOVE DIVERTER VALV

Next: !p995, f990

OBSERVATION ADDITIONAL FAULT BURNER IGNITION

NOW THAT THE BURNER

Next: !p920, !f921

OBSERVATION ADDITIONAL FAULT BURNER ESTABLISH

NOW THAT THE BURNER

Next: !p923, !f924

RESISTANCE MAINS INTO BOILER

{GAINPCBACS}
REMOVE FUSE FROM CONTROL PCB

Next: p928, f929

RESISTANCE PUMP AND HARNESS

DISCONNECT CONNECTOR J3 FROM THE CONTROL PCB

Next: p934, f935

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR J2 FROM THE IGNITION PCB

Next: p938, f939

RESISTANCE GAS VALVE SOLENOIDS AND HARNESS WITH EARTH CHECK

DISCONNECT CONNECTOR J3 FROM THE IGNITION PCB

Next: p1656, f943

INSPECTION CH POTENTIOMETER

{GAINPCBACS}

Next: p1021, !f1022

PRESSURE EXPANSION VESSEL

DISCHARGE PRIMARY SYSTEM WATER

Next: !p987, !f988

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT CONNECTOR J3 FROM THE CONTROL PCB

Next: !p993, !f994

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT CONNECTOR J3 FROM THE CONTROL PCB

Next: !p1001, !f1002

Welcome to the XSol Diagnostic System