XSol Diagnostic System

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:

WICKES COMBI 102 FROM SNO AC100000131

WARNING - IMPORTA

Next: &2, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

WICKES COMBI 102 FROM SNO AC100000131

GC NUMBER 47-333-18

Next: &801, !f4

OBSERVATION PUMP RUNS

SET FLOW RATE TO 2.8

Next: &118, f15

OBSERVATION FAN RUNS

GAIN ACCESS TO COMBU

Next: &206, ?733, ?735

OBSERVATION DHW FLOW RATE

Next: &14, f186

OBSERVATION BURNER IGNITION

REFIT COMBUSTION CHA

Next: &316, ?208, ?210, ?212, ?551

OBSERVATION BOILER RESPONDS TO CH DEMAND

CH TEMPERATURE SET TO MAX
SELECTOR SWITCH IN HEATING & HOT WATER POSITION

Next: &467, f441

OPERATION DHW

SELECTOR SWITCH IN HOT WATER POSITION
DHW TEMPERATURE SET TO MAX

Next: &701, ?470, ?472, ?474, ?476

OPERATION CH

CH TEMPERATURE CONTROL SET TO MAX
SELECTOR SWITCH IN HEATING & HOT WATER POSITION

Next: &716, ?577, ?579, ?583

OBSERVATION PUMP OVERRUN

SELECTOR SWITCH IN HEATING & HOT WATER POSITION
CH TEMPERATURE SET TO MAX

Next: &nff, !f604

FUSE FURTHER INVESTIGATION

OUTSIDE MODEL

Next: &nff, f670

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &667, !f668

SEQUENCE OF OPERATION

Next: &164, !f669

OBSERVATION DHW MODULATION

ADJUST DHW FLOW RATE

Next: &468, f705

OBSERVATION CH MODULATION

CH TEMPERATURE CONTR

Next: &931, f717

OBSERVATION BOILER STANDBY

ENSURE NO DEMANDS
SELECTOR SWITCH IN HEATING & HOT WATER POSITION

Next: &666, ?802, ?804

OBSERVATION PUMP PROVING MICROSWITCH MOVEMENT

SELECTOR SWITCH IN HOT WATER POSITION

Next: &469, f984

PUMP PROVING FAULT CODE

OUTSIDE MODEL

Next: &nff, f1164

BAFFLING - FLUEWAYS RESTRICTED

HEAT EXCHANGER

Next: End

BLOCKED - BAFFLES

BURNER BLADE ASSEMBLY - WORGAS

Next: End

BLOCKED - BAFFLES

FLUE

Next: End

BOILER UP TO TEMP RADS COOL

Next: End

OVERHEAT INVESTIGATION CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

OVERHEAT INVESTIGATION - NO PUMP OVERRUN

PCB - HONEYWELL

Next: End

OVERHEAT INVESTIGATION

Next: End

NO SPARKING

HARNESS - IGNITION

Next: End

NO SPARKING - POOR CONDITION

ELECTRODE - IGNITION

Next: End

OPEN CIRCUIT TO PUMP

HARNESS - PUMP

Next: End

RESTRICTED - CUTTING OUT DURING OPERATIONBLOCKED

FAN VENTURI

Next: End

FLUEWAYS RESTRICTED - CUTTING OUT DURING OPERATIONNO IGNITION

HEAT EXCHANGER

Next: End

RESTRICTED - CUTTING OUT DURING OPERATION

FLUE

Next: End

RESTRICTED - CUTTING OUT DURING OPERATION

TUBE 10MM - CLEAR SILICONE

Next: End

CUTTING OUT DURING OPERATION

PRESSURE SWITCH - AIR

Next: End

DHW RUNS HOT COLD - WATERWAYS RESTRICTED

HEAT EXCHANGER

Next: End

DHW RUNS HOT COLD

INLET PRESSURE

Next: End

DHW RUNS HOT COLD - VOLTAGE TO GAS VALVE INCORRECT

PCB - HONEYWELL

Next: End

NOT RECTIFYING

HARNESS - IGNITION

Next: End

PUMP PROVING FAULTBLOCKED

PIPE - HIGH / LOW PRESSURE DHW

Next: End

PUMP PROVING FAULT CODE DHW NOT MAKING

MICROSWITCH ASSEMBLY

Next: End

PUMP PROVING FAULT CODE OPEN CIRCUIT TO PUMP

HARNESS - PUMP

Next: End

PUMP PROVING FAULT CODE PUMP PROVING SPINDLE STUCK OUT

KIT - DIVERTER VALVE SERVICE

Next: End

PUMP PROVING FAULT CODE PUMP PROVING STUCK SHORTED

MICROSWITCH ASSEMBLY

Next: End

PUMP PROVING FAULT CODE SPINDLE STUCK IN

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

PUMP PROVING FAULT CODE STUCK IN FAN RUNS FOR 4 SECONDS

KIT - SERVICE - WATER PRESSURE SWITCH

Next: End

PUMP PROVING FAULT CODE

MICROSWITCH ASSEMBLY

Next: End

PUMP PROVING FAULT CODE SPINDLE MOVING SLOWLY

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

PUMP PROVING FAULT CODE SPINDLE MOVING SLOWLY

KIT - SERVICE - WATER PRESSURE SWITCH

Next: End

PUMP PROVING FAULT CODE DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

PUMP PROVING FAULT CODE CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

INSUFFICIENT DHW FLOW RATE

VALVE 15MM - BALL

Next: End

INSUFFICIENT PRESSURE

WATER SUPPLY

Next: End

NO IGNITION - LOW PRESSURE

INLET PRESSURE

Next: End

NO IGNITION - NO PRESSURE

INLET PRESSURE

Next: End

NO AC POWER TO GAS VALVE

PCB - HONEYWELL AND VALVE HONEYWELL GAS

Next: End

OPEN CIRCUIT TO GAS VALVE

HARNESS 230V

Next: End

BLOCKED - NO IGNITION

BURNER BLADE ASSEMBLY - WORGAS

Next: End

NOT ESTABLISHING

INLET PRESSURE

Next: End

NOT ESTABLISHING - POOR CONDITION

ELECTRODE - DETECTION

Next: End

BLOCKED - NOT ESTABLISHING

BURNER BLADE ASSEMBLY - WORGAS

Next: End

BLOCKED - NO IGNITION

TUBE 10MM - CLEAR SILICONE

Next: End

BLOCKED - NO IGNITION

FAN VENTURI

Next: End

NO IGNITION - FLUEWAYS RESTRICTED

HEAT EXCHANGER

Next: End

BLOCKED - NO IGNITION

FLUE

Next: End

RUNNING SLOW - OVERHEAT INVESTIGATION

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

OPEN CIRCUIT

THERMOSTAT - OVERHEAT CUT-OFF

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

OVERHEAT INVESTIGATION

INLET PRESSURE

Next: End

OVERHEAT INVESTIGATION - WATERWAYS RECTRICTED

HEAT EXCHANGER

Next: End

RESTRICTED - OVERHEAT INVESTIGATION

PLATE HEAT EXCHANGER - ALFA LAVAL

Next: End

OPEN CIRCUIT TO EXTERNAL CONTROLS

Next: End

OPEN CIRCUIT TO EXTERNAL CONTROLS - OVERHEAT INVESTIGATION

Next: End

DHW TOO COOL

KNOB PLASTIC

Next: End

RUNNING SLOW - DHW TOO COOL

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

DHW TOO COOL - WATERWAYS RESTRICTED

HEAT EXCHANGER

Next: End

DHW TOO COOL

INLET PRESSURE

Next: End

DHW TOO COOL

VALVE HONEYWELL GAS

Next: End

DHW TOO COOL DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW TOO HOT DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW TOO HOT

KNOB PLASTIC

Next: End

DHW RUNS HOT COLD DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW RUNS HOT COLD CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

NOT MAKING PUMP PROVING SWITCH

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

PUMP PROVING DIAPHRAGM BURNER IGNITES BUT CUTS OUT

KIT - SERVICE - WATER PRESSURE SWITCH

Next: End

PUMP PROVING STUCK OPEN BURNER IGNITES BUT CUTS OUT

MICROSWITCH ASSEMBLY

Next: End

IGNITES BUT CUTS OUT DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

IGNITES BUT CUTS OUT CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

EXCESSIVE PRESSURE RISE

EXPANSION VESSEL

Next: End

BYPASS STUCK OPEN

MANIFOLD - FLOW

Next: End

SHUT - BOILER UP TO TEMP RADS COOL

ISOLATION VALVES FLOW AND RETURN

Next: End

CH STAYS LIT BUT TEMP LOW

KNOB PLASTIC

Next: End

UNABLE TO ADJUST CH OUTPUT - BOILER AND RADIATOR TEMP LOW

PCB - HONEYWELL

Next: End

NO PUMP OVERRUN

PCB - HONEYWELL

Next: End

RUNNING SLOW - BOILER UP TO TEMP RADIATORS COOL

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

OPEN CIRCUIT TO APS

HARNESS 230V

Next: End

NO DC POWER TO GAS VALVE

PCB - HONEYWELL AND VALVE HONEYWELL GAS

Next: End

NOT CHANGING GAS VALVE VOLTAGE - DOES NOT IGNITE

PCB - HONEYWELL

Next: End

NOT ESTABLISHING GAS VALVE ADJUSTMENT

PCB - HONEYWELL

Next: End

OVERHEAT INVESTIGATION

CH OUTPUT ADJUSTMENT

Next: End

OVERHEAT INVESTIGATION - BURNER PRESSURE ADJUSTMENT

PCB - HONEYWELL

Next: End

OPEN CIRCUIT TO CLOCK - OVERHEAT INVESTIGATION

HARNESS - INLET

Next: End

OPEN CIRCUIT TO CLOCK

HARNESS - INLET

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

SEQUENCE OF OPERATION

Z REDIRECT

Next: End

SHORT CIRCUIT ON MAINS - FUSE INVESTIGATION

HARNESS - INLET

Next: End

SHORT CIRCUIT MOTOR - FUSE INVESTIGATION

TIME CLOCK - GRASSLIN

Next: End

SHORTED - FUSE INVESTIGATION

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

SHORTED - FUSE INVESTIGATION

COMBI FAN ASSEMBLY

Next: End

SHORTED - FUSE INVESTIGATION

VALVE HONEYWELL GAS

Next: End

DHW MODULATION

VALVE HONEYWELL GAS

Next: End

CH DOES NOT MODULATE CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW DOES NOT MODULATE DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

CH MODULATION

PCB - HONEYWELL

Next: End

NOT RESETTING

SWITCH - MAIN

Next: End

BLOCKED - APS SHORTED

TUBE 10MM - CLEAR SILICONE

Next: End

BLOCKED - APS SHORTED

FAN VENTURI

Next: End

FAN NOT RUNNING CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

FAN NOT RUNNING DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

OPEN CIRCUIT TO FAN

HARNESS 230V

Next: End

NOT MAKING PUMP PROVING SWITCHFAN RUNS FOR 4 SECONDS

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

PUMP PROVING DIAPHRAGM FAN RUNS FOR 4 SECONDS

KIT - SERVICE - WATER PRESSURE SWITCH

Next: End

PUMP PROVING STUCK OPEN FAN RUNS FOR 4 SECONDS

MICROSWITCH ASSEMBLY

Next: End

RUNNING SLOW - DHW RUNS HOT COLD

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

UNABLE TO RESET

THERMOSTAT - OVERHEAT CUT-OFF

Next: End

FIRING WITH NO DEMAND

FROST PROTECTION

Next: End

FIRING WITH NO DEMAND

EXTERNAL ROOM THERMOSTAT OR TIMER

Next: End

BLOCKED

PIPE - HIGH / LOW PRESSURE DHW

Next: End

DHW NOT MAKING

MICROSWITCH ASSEMBLY

Next: End

PUMP PROVING STUCK SHORTED

MICROSWITCH ASSEMBLY

Next: End

PUMP NOT RUNNING CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

PUMP NOT RUNNING DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

FIRING WITH NO DEMAND

JUMPER SETTING

Next: End

SHORT CIRCUIT TO CLOCK - FIRING WITH NO DEMAND

HARNESS - INLET

Next: End

FAULTY LED

Z REDIRECT

Next: End

POWER ON LED NOT ILLUMINATED

PCB FUSE

Next: End

OPEN CIRCUIT TO PCB

HARNESS - INLET

Next: End

POWER ON LED NOT ILLUMINATED

MAINS FUSE

Next: End

FIRING WITN NO DEMAND CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW STUCK MADE

MICROSWITCH ASSEMBLY

Next: End

FAN RUNS FOR 4 SECONDS DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

FAN RUNS FOR 4 SECONDS CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

PUMP MICROSWITCH MOVING SLOWLY

KIT - SERVICE - WATER PRESSURE SWITCH

Next: End

PUMP PROVING SPINDLE STUCK OUT

KIT - SERVICE - WATER PRESSURE SWITCH

Next: End

PUMP DOES NOT RUN

REGULATOR 15 LITRE

Next: End

PUMP DOES NOT RUN

KIT - SANITARY WATER SERVICE

Next: End

DHW SPINDLE NOT MOVING

KIT - DIVERTER VALVE SERVICE

Next: End

RUNNING SLOW - BAFFLES

COMBI FAN ASSEMBLY

Next: End

BOILER UP TO TEMP RADS COOL

KIT - DIVERTER VALVE SERVICE

Next: End

FIRING WITH NO DEMAND

DIAPHRAGM - DIVERTER VALVE

Next: End

FIRING WITH NO DEMAND

CHAMBER - DHW DIAPHRAGM

Next: End

BOILER UP TO TEMP RADS COOL

DIAPHRAGM - DIVERTER VALVE

Next: End

BOILER UP TO TEMP RADS COOL

CHAMBER - DHW DIAPHRAGM

Next: End

TRIPPING EARLY - OVERHEAT INVESTIGATION

THERMOSTAT - OVERHEAT CUT-OFF

Next: End

OVERHEAT INVESTIGATION - NOT SHUTTING DOWN

PCB - HONEYWELL

Next: End

NO FAULT FOUND

OVERHEAT

Next: End

NOT RUNNING

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

NO SPARKING

PCB - HONEYWELL

Next: End

NO SPARKING - OPEN CCT

ELECTRODE - IGNITION

Next: End

RUNNING SLOW - CUTTING OUT DURING OPERATION

COMBI FAN ASSEMBLY

Next: End

RESTRICTED - DHW RUNS HOT COLD

PLATE HEAT EXCHANGER - ALFA LAVAL

Next: End

DHW RUNS HOT COLD

GAS VALVE ADJUSTMENT

Next: End

DHW RUNS HOT COLD

VALVE HONEYWELL GAS

Next: End

DHW RUNS HOT COLD - BURNER PRESSURE OK

PCB - HONEYWELL

Next: End

NOT ESTABLISHING - OPEN CIRCUIT

ELECTRODE - DETECTION

Next: End

PUMP PROVING FAULT CODE NO POWER TO PUMP

PCB - HONEYWELL

Next: End

PUMP PROVING FAULT CODE NOT MOVING DHW SPINDLE

DIAPHRAGM - DIVERTER VALVE

Next: End

PUMP PROVING FAULT CODE NOT MOVING SPINDLE

CHAMBER - DHW DIAPHRAGM

Next: End

PUMP PROVING FAULT CODE DHW SPINDLE NOT MOVING

KIT - DIVERTER VALVE SERVICE

Next: End

PUMP PROVING FAULT CODE PUMP DOES NOT RUN

REGULATOR 15 LITRE

Next: End

PUMP PROVING FAULT CODE PUMP DOES NOT RUN

KIT - SANITARY WATER SERVICE

Next: End

PUMP PROVING FAULT CODE OPEN CIRCUIT TO DHW MICROSWITCH

HARNESS - LOW VOLTAGE

Next: End

PUMP PROVING FAULT CODE NOT RUNNING

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

PUMP PROVING FAULT CODE NO POWER TO PUMP PROVING MICROSWITCH

PCB - HONEYWELL

Next: End

PUMP PROVING FAULT CODE SHORT CIRCUIT TO PUMP PROVING MICROSWITICH

HARNESS - LOW VOLTAGE

Next: End

PUMP PROVING FAULT CODE SPINDLE STUCK IN

PRESSURE GAUGE 4 BAR

Next: End

PUMP PROVING FAULT CODE SPINDLE STUCK IN

SYSTEM PRESSURE

Next: End

PUMP PROVING FAULT CODE STUCK IN

KIT - DIVERTER VALVE SERVICE

Next: End

PUMP PROVING FAULT CODE OPEN CIRCUIT TO PUMP PROVING MICROSWITCH

HARNESS - LOW VOLTAGE

Next: End

PUMP PROVING FAULT CODE SPINDLE MOVING SLOWLY

PRESSURE GAUGE 4 BAR

Next: End

PUMP PROVING FAULT CODE SPINDLE MOVING SLOWLY

SYSTEM PRESSURE

Next: End

PUMP PROVING FAULT CODE MOVING SLOWLY

KIT - DIVERTER VALVE SERVICE

Next: End

PUMP PROVING FAULT CODE STUCK IN FAULT

PCB - HONEYWELL

Next: End

RESTRICTED - LOW FLOW RATE

PLATE HEAT EXCHANGER - ALFA LAVAL

Next: End

RESTRICTED

REGULATOR 15 LITRE

Next: End

DHW FILTER RESTRICTED

KIT - SANITARY WATER SERVICE

Next: End

LOW PRESSURE - NO IGNITION PCB ADJUSTMENT

GAS VALVE ADJUSTMENT

Next: End

NO AC POWER TO GAS VALVE

PCB - HONEYWELL

Next: End

NO IGNITION AC VOLTAGE

PCB - HONEYWELL AND HARNESS 230V

Next: End

BLOCKED - NO IGNITION

INJECTOR

Next: End

NOT RECOGNISING FLAME

PCB - HONEYWELL

Next: End

NO VOLTAGE TO RECTIFICATION CIRCUIT

PCB - HONEYWELL

Next: End

NOT ESTABLISHING

GAS VALVE ADJUSTMENT

Next: End

BLOCKED - NOT ESTABLISHING

INJECTOR

Next: End

RUNNING SLOW - NO IGNITION

COMBI FAN ASSEMBLY

Next: End

OPEN CIRCUIT TO OVERHEAT

HARNESS 230V

Next: End

OVERHEAT INVESTIGATION

GAS VALVE ADJUSTMENT

Next: End

OVERHEAT INVESTIGATION

Next: End

NOT SWITCHING ON

TIME CLOCK - GRASSLIN

Next: End

NOT RECOGNISING CH DEMAND FROM EXTERNAL CONTROLS

Next: End

NOT SWITCHING

EXTERNAL ROOM THERMOSTAT OR TIMER

Next: End

NOT RECOGNISING CH DEMAND FROM EXTERNAL CONTROLS - OVERHEAT INVESTIGATION

Next: End

NOT SWITCHING - OVERHEAT INVESTIGATION

EXTERNAL ROOM THERMOSTAT OR TIMER

Next: End

NOT SWITCHING ON - OVERHEAT INVESTIGATION

TIME CLOCK - GRASSLIN

Next: End

STUCK IN - DHW TOO COOL RADIATORS HEAT

KIT - DIVERTER VALVE SERVICE

Next: End

BLOCKED - DHW COOL

INJECTOR

Next: End

RESTRICTED - DHW TOO COOL

PLATE HEAT EXCHANGER - ALFA LAVAL

Next: End

DHW TOO COOL

GAS VALVE ADJUSTMENT

Next: End

LOW VOLTAGE TO GAS VALVE MODULATING COIL - DHW TOO COOL

PCB - HONEYWELL

Next: End

DHW TOO HOT

PCB - HONEYWELL

Next: End

NO POWER TO PUMP PROVING MICROSWITCH BURNER IGNITES BUT CUTS OUT

PCB - HONEYWELL

Next: End

BLOCKED BURNER IGNITES BUT CUTS OUT

PRESSURE GAUGE 4 BAR

Next: End

PUMP PROVING SPINDLE BURNER IGNITES THEN CUTS OUT

SYSTEM PRESSURE

Next: End

PUMP PROVING SPINDLE STUCK IN BURNER IGNITES BUT CUTS OUT

KIT - DIVERTER VALVE SERVICE

Next: End

OPEN CIRCUIT TO PUMP PROVING MICROSWITCH BURNER IGNITES THEN CUTS OUT

HARNESS - LOW VOLTAGE

Next: End

IGNITES BUT CUTS OUT

PCB - HONEYWELL

Next: End

EXCESSIVE PRESSURE RISE

HOSE - BRAIDED S/S

Next: End

BOILER UP TO TEMP RADIATORS COOL

Next: End

CUTTING OUT / MODULATING EARLY - BOILER AND RADIATOR TEMPERATURE LOW

PCB - HONEYWELL

Next: End

BOILER AND RADIATOR TEMPERATURE LOW

CH OUTPUT ADJUSTMENT

Next: End

NOT SWITCHING

PRESSURE SWITCH - AIR

Next: End

NO DC POWER TO GAS VALVE

PCB - HONEYWELL

Next: End

NO IGNITION DC VOLTAGE

PCB - HONEYWELL AND HARNESS 230V

Next: End

NO IGNITION NO PRESSURE

VALVE HONEYWELL GAS

Next: End

NOT ESTABLISHING

VALVE HONEYWELL GAS

Next: End

FURTHER INVESTIGATION

FUSE BLOWN

Next: End

SHORT CIRCUIT - FUSE INVESTIGATION

PCB - HONEYWELL

Next: End

SHORTED - FUSE INVESTIGATION

HARNESS - PUMP

Next: End

SHORT CIRCUIT TO GAS VALVE - FUSE INVESTIGATION

HARNESS 230V

Next: End

SHORT CIRCUIT TO CLOCK MOTOR - FUSE INVESTIGATION

HARNESS - INLET

Next: End

SHORT CIRCUIT TO FAN - FUSE INVESTIGATION

HARNESS 230V

Next: End

NOT MODULATING ON DHW

PCB - HONEYWELL

Next: End

DHW MODULATION

GAS VALVE ADJUSTMENT

Next: End

CH MODULATION

CH OUTPUT ADJUSTMENT

Next: End

NOT RESETTING

PCB - HONEYWELL

Next: End

SHORT CIRCUIT TO APS

HARNESS 230V

Next: End

SHORTED

PRESSURE SWITCH - AIR

Next: End

NO POWER TO FAN

PCB - HONEYWELL

Next: End

SEIZED

COMBI FAN ASSEMBLY

Next: End

NO POWER TO PUMP PROVING MICROSWITCH FAN RUNS FOR 4 SECONDS

PCB - HONEYWELL

Next: End

BLOCKED FAN RUNS FOR 4 SECONDS

PRESSURE GAUGE 4 BAR

Next: End

PUMP PROVING SPINDLE FAN RUNS FOR 4 SECONDS

SYSTEM PRESSURE

Next: End

PUMP PROVING SPINDLE STUCK IN FAN RUNS FOR 4 SECONDS

KIT - DIVERTER VALVE SERVICE

Next: End

OPEN CIRCUIT TO PUMP PROVING MICROSWITCH FAN RUNS FOR 4 SECONDS

HARNESS - LOW VOLTAGE

Next: End

BLOCKED OVERHEAT INVESTIGATION

PRESSURE GAUGE 4 BAR

Next: End

OVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

BLOCKED DHW RUNS HOT COLD

PRESSURE GAUGE 4 BAR

Next: End

DHW RUNS HOT / COLD

SYSTEM PRESSURE

Next: End

BLOCKED DHW TOO COOL

PRESSURE GAUGE 4 BAR

Next: End

DHW TOO COOL

SYSTEM PRESSURE

Next: End

NO IGNITION LOW PRESSURE

GAS VALVE + POTENTIOMETERS ADJUSTED

Next: End

OVERHEAT INVESTIGATION

GAS VALVE + POTENTIOMETERS ADJUSTED

Next: End

FIRING WITH NO DEMAND

PCB - HONEYWELL

Next: End

FIRING WITH NO DEMAND

TAP

Next: End

MAINS FUSE BLOWN

Z REDIRECT

Next: End

NO POWER TO PCB

Next: End

PCB FUSE BLOWN

Z REDIRECT

Next: End

NOT MOVING DHW SPINDLE

DIAPHRAGM - DIVERTER VALVE

Next: End

NOT MOVING SPINDLE

CHAMBER - DHW DIAPHRAGM

Next: End

OPEN CIRCUIT TO DHW MICROSWITCH

HARNESS - LOW VOLTAGE

Next: End

SHORT CIRCUIT TO PUMP PROVING MICROSWITICH

HARNESS - LOW VOLTAGE

Next: End

CH THERMISTOR

HARNESS - LOW VOLTAGE

Next: End

NO POWER TO PUMP

PCB - HONEYWELL

Next: End

DHW THERMISTOR

HARNESS - LOW VOLTAGE

Next: End

SHORT CIRCUIT - FIRING WITH NO DEMAND

TIME CLOCK - GRASSLIN

Next: End

FAULTY LED

PCB - HONEYWELL

Next: End

BOILER UP TO TEMP RADS COOL

TAP

Next: End

SHORT CIRCUIT TO DHW MICROSWITCH

HARNESS - LOW VOLTAGE

Next: End

FAN RUNS FOR 4 SECONDS

PCB - HONEYWELL

Next: End

PUMP MICROSWITCH MOVING SLOWLY

KIT - DIVERTER VALVE SERVICE

Next: End

STUCK OUT - FIRING WITH NO DEMAND

KIT - DIVERTER VALVE SERVICE

Next: End

REGULATOR RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p1002

FILTER / VENTURI RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p1004

DHW DIAPHRAGM DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1019

SPINDLE OR CHAMBER HOUSING DAMAGED / WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1021

DHW DIAPHRAGM DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1024

SPINDLE OR CHAMBER HOUSING DAMAGED / WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1026

OVERHEAT TRIPS BEFORE 82°C

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1046

FLOW TEMPERATURE ABOVE 88°C AND BOILER DOES NOT SHUT DOWN

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: p1048

DHW DIAPHRAGM DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1175

SPINDLE OR CHAMBER HOUSING DAMAGED / WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1177

REGULATOR RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p1183

FILTER / VENTURI RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p1185

VOLTAGE PRESENT ON TEST 1 BUT DOES NOT DROP TO APPROX 0V DC

CHARACTERISTIC TEST FROM VOLTAGE MICROSWITCH PUMP PROVING

Next: p1193

NO VOLTAGE PRESENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE MICROSWITCH PUMP PROVING

Next: p1195

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1206

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1208

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1219

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1221

REGULATOR RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p196

FILTER / VENTURI RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p197

BURNER IGNITES BUT BAFFLES

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p1006

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p271

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p213

PRESSURE PRESENT BUT BELOW APPROX 5MB

CHARACTERISTIC TEST FROM PRESSURE IGNITION

Next: p232

PRESSURE REMAINS AT 0MBAR

CHARACTERISTIC TEST FROM PRESSURE IGNITION

Next: p234

INITIAL 140V ABSENT

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: !p268

140V PRESENT BUT DOES NOT DROP ON IGNITION

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION CIRCUIT

Next: p282

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL CH

Next: p419

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL CH

Next: p456

DHW TOO COOL, RADIATORS REMAIN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p471

DHW TOO COOL, RADIATORS BEGIN TO HEAT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: !p473

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p475

DHW RUNS HOT / COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p477

BURNER IGNITES SMOOTHLY BUT IMMEDIATELY CUTS OUT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION

Next: p553

VOLTAGE PRESENT ON TEST 1 BUT DOES NOT DROP TO APPROX 0V DC

CHARACTERISTIC TEST FROM VOLTAGE MICROSWITCH PUMP PROVING

Next: p556

NO VOLTAGE PRESENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE MICROSWITCH PUMP PROVING

Next: !p558

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p563

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p565

BOILER UP TO TEMPERATURE RADIATORS COOL

CHARACTERISTIC TEST FROM OPERATION CH

Next: p578

BOILER AND RADIATOR TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p580

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p584

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS

Next: p737

FAN RUNS FOR 4 SECONDS THEN STOPS

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS

Next: p758

VOLTAGE PRESENT ON TEST 1 BUT DOES NOT DROP TO APPROX 0V DC

CHARACTERISTIC TEST FROM VOLTAGE MICROSWITCH PUMP PROVING

Next: p761

NO VOLTAGE PRESENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE MICROSWITCH PUMP PROVING

Next: !p763

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p768

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p770

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p783

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p785

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL CH

Next: !p788

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p790

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL CH

Next: !p794

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p796

POWER ON LED DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p827

PUMP RUNS OR BOILER ATTEMPTS TO FIRE WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p808

DHW DIAPHRAGM DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p849

SPINDLE OR CHAMBER HOUSING DAMAGED / WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p851

28/06/2017 14:12:35 1705_1_50_1 10/07/2017 09:08:45

28/06/2017 15:16:41

Next: End

INSPECTION DHW DIAPHRAGM

DHW SYSTEM ISOLATED AND DRAINED

Next: !p1014, ?1023, ?1025

INSPECTION SPARK ELECTRODES

Next: p1103, !f1108

RESISTANCE IGNITION LEADS

REMOVE ELECTRODE LEADS FROM SPARK GENERATOR

Next: !p1106, !f1107

INSPECTION FAN VENTURI

REMOVE FAN ASSEMBLY

Next: p1138, !f1139

TEMPERATURE DIFFERENTIAL CH

ATTACH A TEMPERATURE

Next: !p1151, !f1152

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p1154, !f1155

VOLTAGE DC GAS VALVE AT PCB MAX AND MINIMUM

REMOVE COVER FROM PC

Next: !p1158, !f1159

RESISTANCE RECTIFICATION LEAD

DISCONNECT RECTIFICATION LEAD FROM THE PCB AND FROM THE RECTIFICATION ELECTRODE

Next: !p1162, !f1163

OBSERVATION PUMP RUNS (FAULT CODE)

SET FLOW RATE TO 2.8

Next: p1165, f1166

VOLTAGE PUMP AT PCB

SET FLOW RATE TO 2.8

Next: p1167, f1168

RESISTANCE MICROSWITCH DHW AND HARNESS

SET FLOW RATE TO 2.8 LITRES A MINUTE
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p1169, f1170

INSPECTION DHW SPINDLE

SET FLOW RATE TO 2.8 LITRES A MINUTE

Next: p1171, f1172

INSPECTION DHW DIAPHRAGM

DHW SYSTEM ISOLATED AND DRAINED

Next: p1173, ?1174, ?1176

INSPECTION PUMP PROVING SPINDLE (SEIZED)

Next: p1198, !f1199

INSPECTION PRESSURE SYSTEM

Next: p1204, ?1205, ?1207

INSPECTION PRESSURE SYSTEM

Next: p1217, ?1218, ?1220

VOLTAGE PUMP AT PCB

SET FLOW RATE TO 2.8

Next: p109, f842

INSPECTION ISOLATION VALVE DHW

Next: p188, !f187

RESISTANCE GAS VALVE SOLENOIDS AND HARNESS

DISCONNECT CONNECTOR X6 FROM THE PCB
(AND RECONNECT PLUG FOR GAS VALVE IF NOT ALREADY DONE SO)

Next: !p249, f250

RESISTANCE GAS VALVE SOLENOIDS

DISCONNECT LEAD FROM GAS VALVE

Next: !p251, !f252

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p288, !f287

OBSERVATION OVERHEAT TRIPPED

Next: p356, f335

RESISTANCE OVERHEAT AND HARNESS

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p336, f353

RESISTANCE OVERHEAT

DISCONNECT 1 WIRE FROM THE OVERHEAT THERMOSTAT

Next: !p354, !f377

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p412, !f413

OBSERVATION LINK OUT INTEGRAL TIMER

REMOVE PCB COVER

Next: p443, f450

VOLTAGE EXTERNAL CONTROLS INTO BOILER

SELECTOR SWITCH IN HEATING & HOT WATER POSITION

Next: !p454, f451

RESISTANCE HARNESS EXTERNAL CONTROLS

DISCONNECT CONNECTOR X9 FROM THE PCB

Next: !p455, !f453

VOLTAGE EXTERNAL CONTROLS INTO BOILER

SELECTOR SWITCH IN HEATING & HOT WATER POSITION

Next: !p459, f460

RESISTANCE HARNESS EXTERNAL CONTROLS

DISCONNECT CONNECTOR X9 FROM THE PCB

Next: !p461, !f462

TEMPERATURE DIFFERENTIAL CH

ATTACH A TEMPERATURE

Next: !p493, !f494

VOLTAGE GAS VALVE AT PCB (MAXIMUM)

DHW TEMPERATURE SET TO MAX
SELECTOR SWITCH IN HOT WATER POSITION

Next: p506, f511

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p512, !f513

INSPECTION PRESSURE SYSTEM

Next: p561, ?562, ?564

ADJUSTMENT PRESSURE CH OUTPUT

REMOVE PCB COVER

Next: !p602, !f603

RESISTANCE HARNESS AIR PRESSURE SWITCH

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p629, !f630

RESISTANCE GAS VALVE SOLENOIDS AND HARNESS

DISCONNECT CONNECTOR X6 FROM THE PCB
(AND RECONNECT PLUG FOR GAS VALVE IF NOT ALREADY DONE SO)

Next: !p640, f641

RESISTANCE GAS VALVE SOLENOIDS

DISCONNECT LEAD FROM GAS VALVE

Next: !p642, !f643

VOLTAGE DC GAS VALVE AT PCB FOR ADJUSTMENT

ADJUST POTENTIOMETER

Next: !p799, !f650

VOLTAGE DC GAS VALVE AT PCB FOR ADJUSTMENT

ADJUST POTENTIOMETER

Next: !p652, !f653

VOLTAGE DC GAS VALVE AT PCB MAX AND MINIMUM

REMOVE COVER FROM PC

Next: !p800, !f661

RESISTANCE MAINS INTO BOILER

REPLACE DAMAGED FUSE

Next: p674, f678

RESISTANCE CLOCK MOTOR AND HARNESS

DISCONNECT X2 CONNECTOR FROM THE PCB

Next: p679, f682

RESISTANCE CLOCK MOTOR

DISCONNECT RED WIRES FROM THE CLOCK

Next: !p696, !f684

RESISTANCE PUMP

REMOVE PUMP COVER
REMOVE WIRES FROM PUMP CONNECTIONS

Next: !p686, !f687

RESISTANCE FAN

DISCONNECT WIRES TO THE FAN

Next: !p697, !f690

RESISTANCE GAS VALVE SOLENOIDS WITH EARTH CHECK

DISCONNECT LEAD FROM GAS VALVE

Next: !p694, !f693

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p704, !f719

VOLTAGE DC GAS VALVE MODULATION

ADJUST DHW FLOW RATE

Next: p709, f702

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p721, !f718

INSPECTION MAIN SWITCH CONTROL KNOB

REMOVE THE PLASTIC C

Next: !p740, !f741

RESISTANCE AIR PRESSURE SWITCH AT PCB (OPEN)

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p744, f745

RESISTANCE AIR PRESSURE SWITCH AT APS (OPEN)

DISCONNECT 1 WIRE FROM THE AIR PRESSURE SWITCH

Next: !p746, f747

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p748, !f749

INSPECTION PRESSURE SYSTEM

Next: p766, ?767, ?769

INSPECTION DHW SPINDLE (NO DEMAND)

Next: p817, f822

OBSERVATION ISOLATE DHW

REMOVE LOWER PANEL FROM APPLIANCE
TURN DHW ISOLATION VALVE OFF

Next: !p823, f994

RESISTANCE FUSE (MAINS FUSE)

REMOVE THE FUSE FROM THE FUSED SPUR

Next: p830, f831

FURTHER INVESTIGATION MAINS FUSE

Next: !p832, !f883

FURTHER INVESTIGATION FUSE PCB

Next: !p838, !f881

RESISTANCE MICROSWITCH DHW AND HARNESS

SET FLOW RATE TO 2.8 LITRES A MINUTE
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p843, f844

INSPECTION DHW SPINDLE

SET FLOW RATE TO 2.8 LITRES A MINUTE

Next: p845, f846

INSPECTION DHW DIAPHRAGM

DHW SYSTEM ISOLATED AND DRAINED

Next: p847, ?848, ?850

INSPECTION PUMP PROVING SPINDLE (SEIZED)

Next: p858, !f997

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: !p864, !f865

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p868, !f869

OBSERVATION IS INTEGRAL CLOCK USED

Next: p874, !f814

OBSERVATION ISOLATE DHW

REMOVE LOWER PANEL FROM APPLIANCE
TURN DHW ISOLATION VALVE OFF

Next: !p892, f1013

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p985, !f986

INSPECTION DHW DIAPHRAGM

DHW SYSTEM ISOLATED AND DRAINED

Next: !p995, ?1018, ?1020

INSPECTION HEAT EXCHANGER

Next: p1007, !f1008

INSPECTION BURNER

Next: p1009, !f1010

INSPECTION FLUE

Next: !p1011, !f1012

INSPECTION EXTERNAL BYPASS

Next: p591, !f1031

OBSERVATION RUN BOILER UP TO TEMPERATURE

ATTACH TEMPERATURE P

Next: p1044, ?1045, ?1047

OBSERVATION PUMP OVERRUN

SELECTOR SWITCH IN HEATING & HOT WATER POSITION
CH TEMPERATURE SET TO MAX

Next: !p1051, !f1052

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: !p1049, !f1050

INSPECTION EXTERNAL BYPASS

Next: p409, !f1093

RESISTANCE HARNESS PUMP

REMOVE PLASTIC COVER FROM PUMP
DISCONNECT CONNECTOR X3 FROM THE PCB

Next: !p110, !f111

RESISTANCE IGNITION LEADS AND ELECTRODES

REMOVE ELECTRODE LEADS FROM SPARK GENERATOR ON THE PCB

Next: !p1104, f1105

PRESSURE FAN DIFFERENTIAL

ATTACH TELEGAN ACROSS THE TWO FAN VENTURIS

Next: p1136, f1137

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p1144, !f1145

INSPECTION HEAT EXCHANGER

Next: p1140, !f1141

INSPECTION FLUE

Next: !p1142, !f1143

RESISTANCE AIR PRESSURE SWITCH

DISCONNECT ONE LEAD FROM THE APS

Next: p1148, !f1147

TEMPERATURE DIFFERENTIAL DHW

ATTACH A TEMPERATURE

Next: p1149, f1150

PRESSURE BURNER MAX AND MIN

REMOVE COVER FROM PC

Next: !p1160, f1153

ADJUSTMENT PRESSURE MAX AND MIN

REMOVE COVER FROM PC

Next: !p1156, f1157

VOLTAGE MICROSWITCH PUMP PROVING

SELECTOR SWITCH IN H

Next: p1190, ?1192, ?1194

RESISTANCE HARNESS PUMP

REMOVE PLASTIC COVER FROM PUMP
DISCONNECT CONNECTOR X3 FROM THE PCB

Next: !p1188, !f1189

RESISTANCE MICROSWITCH DHW

REMOVE THE PLASTIC C

Next: !p1186, !f1187

INSPECTION DHW DIFFERENTIAL PIPES

DHW SYSTEM ISOLATED AND DRAINED

Next: p1178, !f1179

INSPECTION DHW FILTER AND REGULATOR

DHW SYSTEM ISOLATED AND DRAINED

Next: !p1180, ?1182, ?1184

OBSERVATION PUMP PROVING MICROSWITCH MOVEMENT

SELECTOR SWITCH IN HOT WATER POSITION

Next: p1215, f1216

INSPECTION PUMP PROVING SPINDLE

SELECTOR SWITCH IN HOT WATER POSITION

Next: p1202, f1203

RESISTANCE MICROSWITCH PUMP PROVING AND HARNESS (OPEN)

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p1196, f1197

RESISTANCE MICROSWITCH PUMP PROVING (OPEN)

REMOVE THE PLASTIC COVER FROM THE PUMP PROVING
MICROSWITCH AND DISCONNECT WIRES

Next: !p1200, !f1201

RESISTANCE MICROSWITCH PUMP PROVING

REMOVE THE PLASTIC COVER FROM THE PUMP PROVING
MICROSWITCH AND DISCONNECT WIRES

Next: !p1213, !f1214

PUMP LIMPET

Next: p1209, !f1210

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p1211, !f1212

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p1226, !f1227

PUMP LIMPET

Next: p1222, !f1223

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p1224, !f1225

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p1228, !f1229

OBSERVATION FLOW RATE INTO BOILER

Next: p189, !f190

INSPECTION DHW FILTER AND REGULATOR

DHW SYSTEM ISOLATED AND DRAINED

Next: !p191, ?192, ?194

VOLTAGE RECTIFICATION CIRCUIT

SELECTOR SWITCH IN HOT WATER POSITION

Next: !p262, ?267, ?269

OBSERVATION SPARKING AT ELECTRODES

GAIN ACCESS TO INNER COMBUSTION CHAMBER
SELECTOR SWITCH IN HOT WATER POSITION

Next: p229, f317

PRESSURE IGNITION

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p230, ?231, ?233

INSPECTION BURNER

Next: !p260, !f261

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p235, !f236

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p237, !f238

ADJUSTMENT IGNITION PRESSURE (NO IGNITION)

REMOVE PCB COVER

Next: !p239, f647

VOLTAGE GAS VALVE AC AT PCB

DISCONNECT LEAD FROM GAS VALVE AND MAKE SAFE
SELECTOR SWITCH IN HOT WATER POSITION

Next: p631, f248

RESISTANCE HARNESS GAS VALVE

DISCONNECT LEAD FROM GAS VALVE

Next: !p646, !f254

PRESSURE IGNITION

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p211, f286

INSPECTION RECTIFICATION ELECTRODE

GAIN ACCESS TO BURNER

Next: p283, !f292

RESISTANCE RECTIFICATION LEAD AND ELECTRODES

Next: p284, f1161

INSPECTION BURNER

Next: !p294, !f296

ADJUSTMENT IGNITION PRESSURE (RECTIFICATION)

REMOVE PCB COVER

Next: !p289, f651

RESISTANCE AIR PRESSURE SWITCH WITH KIT AT PCB

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p337, f628

OBSERVATION SPARKING AT ELECTRODES WITH APS KIT

CONNECT THE AIR PRES

Next: p339, f1097

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p345, !f346

INSPECTION FAN VENTURI

REMOVE FAN ASSEMBLY

Next: p347, !f348

INSPECTION HEAT EXCHANGER

Next: p349, !f350

INSPECTION FLUE

Next: !p351, !f352

OVERHEAT FURTHER INVESTIGATION

ENSURE APPLIANCE IS

Next: p357, !f797

INSPECTION PRESSURE SYSTEM

Next: p359, ?782, ?784

PUMP LIMPET

Next: p1053, !f364

PRESSURE BURNER MAX AND MIN

REMOVE COVER FROM PC

Next: p410, f411

TEMPERATURE DIFFERENTIAL CH

ATTACH A TEMPERATURE

Next: p416, ?418, ?420

ADJUSTMENT PRESSURE MAX AND MIN

REMOVE COVER FROM PC

Next: !p414, f659

TEMPERATURE DIFFERENTIAL DHW

ATTACH A TEMPERATURE

Next: p1043, !f426

TEMPERATURE DIFFERENTIAL DHW

ATTACH A TEMPERATURE

Next: p654, !f423

RESISTANCE HARNESS CLOCK

DISCONNECT ORANGE WIRES FROM THE CLOCK

Next: !p445, !f665

OBSERVATION LINK OUT INTEGRAL TIMER

REMOVE PCB COVER

Next: p457, f458

RESISTANCE HARNESS CLOCK

DISCONNECT ORANGE WIRES FROM THE CLOCK

Next: !p463, !f662

INSPECTION DHW POTENTIOMETER

Next: p480, !f490

INSPECTION DHW POTENTIOMETER

Next: p514, !f517

INSPECTION PRESSURE SYSTEM

Next: p520, ?787, ?789

INSPECTION PRESSURE SYSTEM

Next: p481, ?793, ?795

PUMP LIMPET

Next: p482, !f492

TEMPERATURE DIFFERENTIAL DHW

ATTACH A TEMPERATURE

Next: p483, f484

PRESSURE BURNER MAXIMUM

ATTACH U-GAUGE TO BU

Next: !p485, f505

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
SELECTOR SWITCH IN HOT WATER POSITION

Next: p507, !f508

ADJUSTMENT PRESSURE MAX

ATTACH U-GAUGE TO BU

Next: !p509, !f510

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p518, !f516

PUMP LIMPET

Next: p521, !f791

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: p522, !f526

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p1135, !f527

VOLTAGE MICROSWITCH PUMP PROVING

SELECTOR SWITCH IN H

Next: p554, ?555, ?557

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p572, !f573

INSPECTION PUMP PROVING SPINDLE

SELECTOR SWITCH IN HOT WATER POSITION

Next: p559, f560

RESISTANCE MICROSWITCH PUMP PROVING

REMOVE THE PLASTIC COVER FROM THE PUMP PROVING
MICROSWITCH AND DISCONNECT WIRES

Next: !p570, !f571

PUMP LIMPET

Next: p566, !f567

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p568, !f569

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p576, !f574

INSPECTION DHW SPINDLE (NO DEMAND)

Next: p589, f889

INSPECTION CH POTENTIOMETER

Next: p598, !f599

PRESSURE EXPANSION VESSEL

DISCHARGE PRIMARY SYSTEM WATER

Next: !p585, !f586

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p590, !f596

PUMP LIMPET

Next: p1027, !f627

TEMPERATURE INTEGRAL BYPASS

ENSURE RADIATORS ARE

Next: !p592, !f593

PRESSURE CH OUTPUT SETTING

REMOVE PCB COVER

Next: !p600, f601

VOLTAGE GAS VALVE DC AT PCB

DISCONNECT LEAD FROM GAS VALVE AND MAKE SAFE
SELECTOR SWITCH IN HOT WATER POSITION

Next: p247, f639

PRESSURE CH OUTPUT SETTING

REMOVE PCB COVER

Next: !p422, !f658

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p672, f688

RESISTANCE GAS VALVE SOLENOIDS AND HARNESS WITH EARTH CHECK

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: !p673, f691

RESISTANCE PUMP AND HARNESS

DISCONNECT CONNECTOR X3 FROM THE PCB

Next: p671, f685

RESISTANCE MAINS INTO BOILER AT PLUG

DISCONNECT CONNECTOR X1 FROM THE PCB

Next: !p680, !f681

ADJUSTMENT PRESSURE MAX AND MIN

REMOVE COVER FROM PC

Next: !p710, !f711

ADJUSTMENT CH OUTPUT MINIMUM

REMOVE PCB COVER

Next: !p722, !f724

OBSERVATION BOILER RESET

REMOVE PCB COVER

Next: p738, f739

VOLTAGE FAN AT PCB

SELECTOR SWITCH IN HOT WATER POSITION

Next: p742, f743

VOLTAGE FAN AT FAN

SELECTOR SWITCH IN HOT WATER POSITION

Next: !p756, !f757

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p752, !f753

INSPECTION FAN VENTURI

REMOVE FAN ASSEMBLY

Next: !p750, !f751

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p754, !f755

VOLTAGE MICROSWITCH PUMP PROVING

SELECTOR SWITCH IN H

Next: p979, ?760, ?762

INSPECTION PUMP PROVING SPINDLE

SELECTOR SWITCH IN HOT WATER POSITION

Next: p764, f765

RESISTANCE MICROSWITCH PUMP PROVING

REMOVE THE PLASTIC COVER FROM THE PUMP PROVING
MICROSWITCH AND DISCONNECT WIRES

Next: !p775, !f776

PUMP LIMPET

Next: p771, !f772

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p773, !f774

RESISTANCE MICROSWITCH DHW AND HARNESS (OPEN)

Next: p806, f807

OBSERVATION DISCONNECT X9

DISCONNECT CONNECTOR X9 FROM THE PCB AND MAKE SAFE

Next: p819, f870

TEMPERATURE AMBIENT

Next: p805, !f812

RESISTANCE MICROSWITCH DHW (OPEN)

REMOVE THE PLASTIC COVER FROM THE HOT WATER
MICROSWITCH AND DISCONNECT WIRES

Next: !p901, !f902

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: !p820, !f884

VOLTAGE MAINS POWER IN AT PCB

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: p828, f829

RESISTANCE FUSE (PCB)

REMOVE THE COVER FROM THE PCB
REMOVE THE INTERNAL FUSE FROM THE PCB

Next: p836, f837

RESISTANCE HARNESS MAINS IN

DISCONNECT CONNECTOR MARKED X1 FROM THE PCB

Next: !p834, !f882

INFORMATION FAULTY LED

TESTS CARRIED OUT HA

Next: !p879, !f880

RESISTANCE MICROSWITCH PUMP PROVING AND HARNESS (OPEN)

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p856, f857

RESISTANCE MICROSWITCH DHW

REMOVE THE PLASTIC C

Next: !p854, !f855

INSPECTION DHW DIFFERENTIAL PIPES

DHW SYSTEM ISOLATED AND DRAINED

Next: p999, !f853

RESISTANCE SENSOR CH AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p862, f863

RESISTANCE MICROSWITCH PUMP PROVING (OPEN)

REMOVE THE PLASTIC COVER FROM THE PUMP PROVING
MICROSWITCH AND DISCONNECT WIRES

Next: !p860, !f861

RESISTANCE SENSOR DHW AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p866, f867

INSPECTION CLOCK JUMPER SETTING

REMOVE PCB COVER

Next: p875, !f876

INSPECTION HARNESS CLOCK

Next: !p877, !f878

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p980, !f981

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p982, !f983

INSPECTION DHW FILTER AND REGULATOR

DHW SYSTEM ISOLATED AND DRAINED

Next: !p1005, ?1001, ?1003

System Information

Total Tests: 531

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control