XSol Diagnostic System

Interactive Test Sequence Navigator

Welcome to the XSol Diagnostic System

This system provides interactive diagnostic tests with proper sequence navigation based on the decoded .seq file logic.

Start Diagnostic Sequence

or choose a specific test below:

IDEAL MINI C24 HE

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

IDEAL MINI C24 HE - 4734838 - TWO PCB VERSION

Next: &3, !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, ?1702

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, f706

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, ?1785

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, f1984

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

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 - PUMP

Next: End

OPERATION CH RADS DO NOT HEAT

CABLE - PUMP

Next: End

OPERATION CH RADS DO NOT HEAT

SERVICE 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

FAULT CODE 002

RECUPERATOR

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 - NOT ESTABLISHING - SHORTING TO EARTH

ELECTRODE - DETECTION

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

OBSERVATION BURNER IGNITION - NO SPARKING

RECUPERATOR

Next: End

OPERATION DHW - DHW COOL RADS COOL

INLET PRESSURE

Next: End

OPERATION DHW - DHW TOO COOL DHW SENSOR

TEMPERATURE PROBE

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 ESTABLISHING - NO RECT VOLTAGE

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

PCB AND GAS VALVE

Next: End

OBSERVATION BURNER IGNITION - NO IGNITION

HEAT EXCHANGER - MAIN

Next: End

OBSERVATION BURNER IGNITION - NO IGNITION

THERMOSTAT 105DEG C - OVERHEAT

Next: End

OBSERVATION BURNER IGNITION - NO IGNITION

THERMOSTAT - FLUE - LIMIT

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 021

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 TEMP...

Next: End

OBSERVATION BOILER STANDBY - PUMP RUNS WITH NO DEMAND

CABLE - DHW FLOW SWITCH AND TEMP...

Next: End

OPERATION DHW - NOISY

TEMPERATURE PROBE

Next: End

OPERATION DHW - NOISY - RUNNING SLOW

MOTOR - PUMP

Next: End

OPERATION DHW - NOISY

RECUPERATOR

Next: End

OPERATION DHW - FLUE STAT TRIPS

HEAT EXCHANGER - MAIN

Next: End

OPERATION DHW - FLUE STAT TRIPS

RECUPERATOR

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

OPERATION CH - FLUE STAT TRIPS

HEAT EXCHANGER - MAIN

Next: End

OPERATION CH - FLUE STAT TRIPS

RECUPERATOR

Next: End

ALTERNATIVE FLOW SWITCH TEST

CABLE - DHW FLOW SWITCH AND TEMP...

Next: End

OBSERVATION PUMP RUNS

CABLE - DHW FLOW SWITCH AND TEMP...

Next: End

ALTERNATIVE FLOW SWITCH TEST

FLOW SWITCH - MAGNETIC

Next: End

FAULT CODE 210 - RUNNING SLOW

MOTOR - 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 - NOT ESTABLISHING

WIRE - DETECTION TO TRAP

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 - IGNITES BUT BAFFLES

RECUPERATOR

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

ELECTRODE - IGNITION

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

BURNER

Next: End

OPERATION DHW - DHW RUNS HOT COLD

MOTOR - PUMP

Next: End

OPERATION DHW - DHW RUNS HOT COLD DHW SENSOR

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW RUNS HOT COLD PRIMARY SENSOR

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW RUNS HOT COLD - VOLTAGE STAYS

RECUPERATOR

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

MOTOR - PUMP

Next: End

OPERATION DHW - DHW RUNS HOT COLD DHW SENSOR DROPPING OUT

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW RUNS HOT COLD PRIMARY SENSOR DROPPING OUT

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

RECUPERATOR

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

ELECTRODE - DETECTION

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

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

CABLE - FLAME DETECTION ELECTRODE

Next: End

OPERATION DHW - DHW RUNS HOT COLD - APS

RECUPERATOR

Next: End

OPERATION DHW - DHW RUNS HOT COLD

THERMOSTAT 105DEG C - OVERHEAT

Next: End

PRESSURE BURNER MAX - DHW SENSOR

TEMPERATURE PROBE

Next: End

PRESSURE BURNER MAX

KNOB

Next: End

PRESSURE BURNER MAXIMUM

INLET PRESSURE

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

BURNER

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 - 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 - DHW 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

PRESSURE BURNER MAXIMUM

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

PRESSURE BURNER MAXIMUM

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

FAULT CODE 220

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

ELECTRODE - IGNITION

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

BURNER

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - LOW PRESSURE

INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - NO PRESSURE

INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING - LOW PRESSURE

GAS VALVE

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 HOT DHW SENSOR

TEMPERATURE PROBE

Next: End

OPERATION DHW - DHW TOO COOL

KNOB

Next: End

OPERATION DHW - DHW TOO COOL

MOTOR - 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 - PUMP

Next: End

FAULT CODE 002 - DHW SENSOR - CUTS OUT

TEMPERATURE PROBE

Next: End

FAULT CODE 002

INLET PRESSURE

Next: End

FAULT CODE 002 - DHW SENSOR - DOES NOT MODULATE

TEMPERATURE PROBE

Next: End

FAULT CODE 212

Z REDIRECT

Next: End

FAULT CODE 021 - DHW SENSOR

TEMPERATURE PROBE

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

OBSERVATION DHW - DHW TOO COOL

RECUPERATOR

Next: End

OBSERVATION DHW FLOW RATE

MAINS WATER SUPPLY / TAP

Next: End

OBSERVATION DHW MODULATION

KNOB

Next: End

OBSERVATION DHW MODULATION - DHW SENSOR

TEMPERATURE PROBE

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 - 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

FAULT CODE 002

HEAT EXCHANGER - MAIN

Next: End

FAULT CODE 002

HEAT EXCHANGER - DHW

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 - NOT ESTABLISHING - SHORTING TO EARTH

CABLE - FLAME DETECTION ELECTRODE

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

GASKET - INLET - FAN

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

GASKET - FAN OUTLET

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

VENTURI

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING - CLOGGED

FAN

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

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

OPERATION DHW - DHW TOO COOL

PCB - ELECTRONIC CONTROL

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 - PUMP

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING - IGNORING RECT VOLTAGE

PCB - FULL SEQUENCE CONTROL DEVICE

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

OBSERVATION BURNER IGNITION - NO IGNITION

RECUPERATOR

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING - OPEN TO OVERHEAT

CABLE - FAN

Next: End

OBSERVATION BURNER IGNITION - NO IGNITION - TRIPPING EARLY

THERMOSTAT - FLUE - LIMIT

Next: End

OPERATION DHW - DHW TOO HOT

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION DHW MODULATION

PCB - ELECTRONIC CONTROL

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 002 - DISPLAYING AT LOW TEMP

PCB - ELECTRONIC CONTROL

Next: End

FAULT CODE 002 - NOT MODULATING ON DHW SENSOR

PCB - ELECTRONIC CONTROL

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

FAULT CODE 021

CABLE - DHW FLOW SWITCH AND TEMP...

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 122

HEAT EXCHANGER - MAIN

Next: End

OPERATION DHW - FLUE STAT TRIPS

THERMOSTAT - FLUE - LIMIT

Next: End

FAULT CODE - NOT FOR APPLIANCE

PCB - ELECTRONIC CONTROL

Next: End

OBSERVATION BURNER IGNITION - NO IGNITION

NO FAULT FLUE OVERHEAT

Next: End

OPERATION CH - FLUE STAT TRIPS

THERMOSTAT - FLUE - LIMIT

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 - NOT ESTABLISHING

CONDENSATE TRAP

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 BURNER IGNITES - IGNITES BUT BAFFLES

GASKET - INLET - FAN

Next: End

OBSERVATION BURNER IGNITES - IGNITES BUT BAFFLES

GASKET - FAN OUTLET

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 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 - MODULATING INCORRECTLY

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER - DHW

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER - MAIN

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 - CUTTING POWER TO IGN PCB

PCB - ELECTRONIC CONTROL

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

HEAT EXCHANGER - DHW

Next: End

OPERATION DHW - DHW RUNS HOT COLD DROPPING OUT

HEAT EXCHANGER - MAIN

Next: End

OPERATION DHW - DHW RUNS HOT COLD

GASKET - INLET - FAN

Next: End

OPERATION DHW - DHW RUNS HOT COLD

GASKET - FAN OUTLET

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

FAN

Next: End

OPERATION DHW - DHW RUNS HOT COLD - BURNER PRESSURE OK

PCB - FULL SEQUENCE CONTROL DEVICE

Next: End

OBSERVATION BURNER IGNITION - NOT ESTABLISHING

INJECTOR

Next: End

PRESSURE BURNER MAXIMUM

GAS VALVE ADJUSTMENT

Next: End

PRESSURE BURNER MAXIMUM - MINIMUM OUT

GAS VALVE

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 IGNITION PCB

PCB - ELECTRONIC CONTROL

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

PRESSURE BURNER MAXIMUM - MAX OUT RESIST

GAS VALVE

Next: End

PRESSURE BURNER MAXIMUM - 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

FAULT CODE 220

Next: End

OBSERVATION BURNER IGNITION - NOT IGNITING

INJECTOR

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 - 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

FAULT CODE 021

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 - PUMP

Next: End

FAULT CODE 210

CABLE - CH FLOW SWITCH TEMPERATURE...

Next: End

OPERATION DHW - DHW TOO COOL

HEAT EXCHANGER - MAIN

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

SERVICE KIT - DIVERTER VALVE

Next: End

FAULT CODE 002

SERVICE 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 INLET SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1251

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: p1409

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

FLUE TEMPERATURE REMAINS BELOW 100°C BUT FAULT CODE REOCCURS

Next: !p1555

FLUE GAS TEMPERATURE ABOVE 100°C

CHARACTERISTIC TEST FROM TEMPERATURE FLUE

Next: p1547

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

FLUE STAT OPERATES DURING OPERATION

Next: p1703

FLUE STAT OPERATES DURING OPERATION

Next: p1786

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

FAN INLET SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1862

FAN OUTLET SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1864

FAN VENTURI DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1866

FAN CLOGGED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1868

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p188

VOLTAGE ABSENT

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p1224

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

VOLTAGE PRESENT BUT DOES NOT DROP

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p194

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 INLET SEAL DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION VENTURI AND FAN SEALS

Next: !p1972

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

UNABLE TO SET MINIMUM PRESSURE CORRECTLY

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: !p1994

MINIMUM SET CORRECTLY BUT UNABLE TO SET MAXIMUM

CHARACTERISTIC TEST FROM ADJUSTMENT PRESSURE MAX AND MIN

Next: p2079

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 VOLTAGE RECTIFICATION CIRCUIT

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 VOLTAGE RECTIFICATION CIRCUIT

Next: p213

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

25/10/2022 13:01:07 2108_1_50_1 21/11/2022 09:19:17

03/11/2022 09:00:31

Next: End

VOLTAGE MAINS IN AT CONNECTOR

{GAINPCBACS}

Next: !p16, f11

VOLTAGE DIVERTER VALVE CH AT PCB

{GAINPCBACS}

Next: p1013, !f1572

INSPECTION CONDENSATE LEAD

Next: !p1839, !f1838

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p1054, f1051

INSPECTION RECUPERATOR HEAT EXCHANGER

BOILER PRIMARY CIRCUIT DRAINED

Next: !p1052, !f1053

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, f1538

RESISTANCE GAS VALVE AT GAS VALVE

DISCONNECT LEAD FROM GAS VALVE

Next: !p1535, !f1536

OBSERVATION FLUE STAT TRIPPED

Next: p1550, f1542

TEMPERATURE FLUE

CH TEMPERATURE CONTR

Next: !p1784, ?1544, ?1546

INSPECTION HARNESS CONTROL PCB TO IGNITION PCB

{GAINPCBACS}

Next: !p1659, !f1679

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p1698, f1699

INSPECTION RECUPERATOR HEAT EXCHANGER

BOILER PRIMARY CIRCUIT DRAINED

Next: !p1700, !f1701

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

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p1933, f1934

INSPECTION RECUPERATOR HEAT EXCHANGER

BOILER PRIMARY CIRCUIT DRAINED

Next: !p1935, !f1936

VOLTAGE CONTROL PCB DEMAND TO IGNITION PCB (CONSTANT)

{GAINPCBACS}

Next: p1938, f1939

INSPECTION PRESSURE SYSTEM

Next: p1940, ?1941, ?1943

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE P

Next: !p1953, f1954

INSPECTION RECUPERATOR HEAT EXCHANGER

BOILER PRIMARY CIRCUIT DRAINED

Next: !p1955, !f1956

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT WIRES AND

Next: p1959, !f1960

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: p1985, !f1986

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: !p2082, !f2083

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

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 DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: !p1583, !f684

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

RESISTANCE SENSOR DHW AND HARNESS

DISCONNECT CONNECTOR J6 FROM THE CONTROL PCB

Next: p707, f708

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: !p1680, !f780

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

INSPECTION RECUPERATOR HEAT EXCHANGER

BOILER PRIMARY CIRCUIT DRAINED

Next: !p871, !f872

OBSERVATION MAINS WATER FLOW RATE

TURN COLD WATER TAP ON

Next: p455, !f89

INSPECTION DHW POTENTIOMETER

{GAINPCBACS}

Next: p895, !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 DISCONNECT CONDENSATE LEAD

DISCONNECT THE LEAD FROM THE CONDENSATE TRAP TO THE RECTIFICATION LEAD

Next: p189, f1038

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

VOLTAGE RECTIFICATION CIRCUIT WITHOUT LEAD

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

Next: p1226, !f1525

INSPECTION RECTIFICATION ELECTRODE (SHORT)

GAIN ACCESS TO BURNER

Next: !p1227, !f1228

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 APPL

Next: p1248, ?1250, ?1252, ?1254, ?1256

INSPECTION RECUPERATOR

REMOVE FAN FROM APPLIANCE

Next: !p1258, !f1259

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

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: !p1424, !f1425

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

INSPECTION HEAT EXCHANGER

GAIN ACCESS TO PRIMARY HEAT EXCHANGER

Next: !p1548, !f1549

RESISTANCE OVERHEAT THERMOSTAT

GAIN ACCESS TO INNER

Next: p1552, !f1551

RESISTANCE FLUE OVERHEAT STAT

DISCONNECT WIRES FROM FLUE STAT (NOTE POSITION OF CONNECTORS)

Next: !p1553, !f1554

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 HEAT EXCHANGER

GAIN ACCESS TO PRIMARY HEAT EXCHANGER

Next: p1704, !f1705

INSPECTION RECUPERATOR

REMOVE FAN FROM APPLIANCE

Next: !p1706, !f1707

INSPECTION HEAT EXCHANGER

GAIN ACCESS TO PRIMARY HEAT EXCHANGER

Next: p1787, !f1788

INSPECTION RECUPERATOR

REMOVE FAN FROM APPLIANCE

Next: !p1789, !f1790

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: p1855, !f1856

ADJUSTMENT PRESSURE MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: !p1845, ?1847, ?1849

INSPECTION RECUPERATOR

REMOVE FAN FROM APPLIANCE

Next: p1857, !f1858

INSPECTION VENTURI AND FAN SEALS

REMOVE FAN FROM APPL

Next: p1859, ?1861, ?1863, ?1865, ?1867

INSPECTION BURNER

GAIN ACCESS TO BURNER

Next: !p1871, !f1870

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: p1025, f201

VOLTAGE RECTIFICATION CIRCUIT

{GAINPCBACS}

Next: !p1524, ?191, ?193

LIMPET TEST

Next: p1925, !f1926

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: p1927, !f1928

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1929, !f1930

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: !p1931, f1932

VOLTAGE APS NORMALLY OPEN (CONSTANT)

Next: p1957, f1958

INSPECTION RECTIFICATION ELECTRODE

GAIN ACCESS TO BURNER
DISCONNECT INLINE CONNECTOR TO THE RECTIFICATION ELECTRODE

Next: p195, !f196

LIMPET TEST

Next: p1945, !f1946

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: p1947, !f1948

RESISTANCE SENSOR PRIMARY

DISCONNECT CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1949, !f1950

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: !p1951, f1952

RESISTANCE RECTIFICATION LEAD

DISCONNECT FLAME SEN

Next: p197, !f198

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 APPL

Next: p1969, ?1971, ?1973, ?1975, ?1977

INSPECTION RECUPERATOR

REMOVE FAN FROM APPLIANCE

Next: !p1979, !f1980

INSPECTION BURNER

GAIN ACCESS TO BURNER

Next: !p199, !f200

INSPECTION DHW POTENTIOMETER

{GAINPCBACS}

Next: p1987, !f1988

PRESSURE GAS INLET

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

Next: p1989, !f1990

ADJUSTMENT PRESSURE MAX AND MIN

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: !p1991, ?1993, ?1995

OBSERVATION DISCONNECT EXTERNAL CONTROLS

{GAINPCBACS}
DISC

Next: !p2116, !f2117

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: p2052, !f2053

RESISTANCE PUMP PROVING MICROSWITCH AT MICROSWITCH

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

Next: !p2050, !f2051

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: !p2054, !f2055

VOLTAGE FAN AT PCB

Next: p2058, f2059

VOLTAGE FAN AT FAN

REMOVE COMBUSTION CHAMBER

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 APPL

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

RESISTANCE GAS VALVE MODUREG AT PCB

DISCONNECT CONNECTOR J7 FROM THE CONTROL PCB

Next: p2080, f2081

PRESSURE IGNITION (FAULT)

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p209, ?210, ?212

VOLTAGE GAS VALVE MODUREG MAXIMUM AT PCB

{GAINPCBACS}

Next: !p2084, !f2085

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

PRESSURE GAS INLET

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

Next: p223, !f219

INSPECTION BURNER

GAIN ACCESS TO BURNER

Next: !p216, !f217

ADJUSTMENT PRESSURE MIN FOR BURNER IGNITION

ATTACH PRESSURE GAUG

Next: p919, !f222

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p224, f1526

RESISTANCE HARNESS GAS VALVE

DISCONNECT CONNECTOR AT GAS VALVE

Next: !p300, !f229

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: p398, !f399

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: !p1563, !f401

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: p660, !f653

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: p661, !f662

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: !p1581, f1049

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, f682

OBSERVATION BOILER RESET - SENSOR FAULT

ENSURE BOILER IS COOL

Next: !p688, !f1584

FAULT CODES

PLEASE USE ALL THE T

Next: !p30, !f31

OBSERVATION BOILER RESET - SENSOR FAULT

ENSURE BOILER IS COOL

Next: !p711, !f1586

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

RESISTANCE SENSOR DHW

DISCONNECT CONNECTOR FROM THE DHW THERMISTOR

Next: !p1570, !f898

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

System Information

  • Total Tests: 697
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control