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:

HALSTEAD FINEST FROM SNO 50000

GLOBALLY REPLACED

Next: &2, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

HALSTEAD FINEST FROM SNO 50000

Next: &801, !f4

OBSERVATION PUMP AND FAN RUNS

DHW TEMPERATURE SET TO MAX

Next: &206, ?1864, ?1894

OBSERVATION DHW FLOW RATE

Next: &14, f186

OBSERVATION BURNER IGNITION

REFIT COMBUSTION CHA

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

OBSERVATION BOILER RESPONDS TO CH DEMAND

CH TEMPERATURE SET TO MAX

Next: &467, f1710

OPERATION DHW

DHW TEMPERATURE SET TO MAX

Next: &701, ?470, ?472, ?474, ?476, ?1918

OPERATION CH

CH TEMPERATURE CONTROL SET TO MAX

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

OBSERVATION PUMP OVERRUN

CH TEMPERATURE SET TO MAX

Next: &nff, !f604

FUSE FURTHER INVESTIGATION TREE

OUTSIDE MODEL

Next: &nff, f670

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &164, !f668

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

Next: &666, ?802, ?804, ?1275, ?1283, ?1305

OBSERVATION PUMP PROVING MICROSWITCH MOVEMENT

Next: &469, !f1978

BAFFLING - FLUEWAYS RESTRICTED

HEAT EXCHANGER

Next: End

BLOCKED - BAFFLES

BURNER ASSEMBLY

Next: End

BLOCKED - BAFFLES

FLUE

Next: End

BOILER UP TO TEMP RADS COOL

Next: End

POWER ON LED NOT ILLUMINATED

MAINS FUSE

Next: End

FAULTY LED

Z REDIRECT

Next: End

POWER ON LED NOT ILLUMINATED

FUSE 250V F2AH (F2)

Next: End

POWER ON LED NO ILLUMINATED

FUSE 250V F2AL (F1)

Next: End

NO POWER TO PUMP

PCB - COMBINED - PACTROL

Next: End

OPEN CIRCUIT TO PUMP

HARNESS NO10-15 240V

Next: End

BLOCKED - APS SHORTED

TUBE 10MM - CLEAR SILICONE

Next: End

BLOCKED - APS SHORTED

FAN VENTURI

Next: End

OPEN CIRCUIT TO FAN

HARNESS NO10-15 240V

Next: End

FAN NOT RUNNING DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

UNABLE TO RESET

THERMOSTAT - OVERHEAT CUT-OFF

Next: End

RUNNING SLOW - OVERHEAT INVESTIGATION

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

OVERHEAT INVESTIGATION

Next: End

OVERHEAT INVESTIGATION - WATERWAYS RECTRICTED

HEAT EXCHANGER

Next: End

RESTRICTED - OVERHEAT INVESTIGATION

PLATE HEAT EXCHANGER - ALFA LAVAL

Next: End

OVERHEAT INVESTIGATION - NO PUMP OVERRUN

PCB - COMBINED - PACTROL

Next: End

OPEN CIRCUIT TO APS

HARNESS NO10-15 240V

Next: End

BLOCKED - SAFETY LED LIT

TUBE 10MM - CLEAR SILICONE

Next: End

BLOCKED - SAFETY LED LIT

FAN VENTURI

Next: End

SAFETY LED LIT - FLUEWAYS RESTRICTED

HEAT EXCHANGER

Next: End

BLOCKED - SAFETY LED LIT

FLUE

Next: End

OPEN CIRCUIT

THERMOSTAT - OVERHEAT CUT-OFF

Next: End

SAFETY LED LIT CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

PUMP PROVING STUCK OPEN FAN SAFETY LED LIT

MICROSWITCH ASSEMBLY

Next: End

FIRING WITN NO DEMAND CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

FIRING WITH NO DEMAND

TIMER (INTERNAL OR EXTERNAL)

Next: End

BOILER AND RADIATOR TEMP LOW CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW TOO COOL DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW TOO COOL

INLET PRESSURE

Next: End

DHW TOO COOL - MODUREG

GAS VALVE - HONEYWELL

Next: End

DHW TOO COOL - VOLTAGE TO GAS VALVE INCORRECT

PCB - COMBINED - PACTROL

Next: End

NO IGNITION - NO PRESSURE - RESISTANCE

GAS VALVE - HONEYWELL

Next: End

NO POWER TO GAS VALVE

PCB - COMBINED - PACTROL

Next: End

OPEN CIRCUIT TO EXTERNAL CONTROLS - OVERHEAT INVESTIGATION

Next: End

OVERHEAT INVESTIGATION

PCB - CHECK JUMPER

Next: End

NOT RECOGNISING CH DEMAND FROM EXTERNAL CONTROLS - OVERHEAT INVESTIGATION

Next: End

OVERHEAT INVESTIGATION

INLET PRESSURE

Next: End

OVERHEAT INVESTIGATION - MODUREG

GAS VALVE - HONEYWELL

Next: End

OVERHEAT INVESTIGATION - VOLTAGE TO GAS VALVE INCORRECT

PCB - COMBINED - PACTROL

Next: End

OVERHEAT INVESTIGATION - MINIMUM WRONG

GAS VALVE - HONEYWELL

Next: End

NOT ESTABLISHING - POOR CONDITION

ELECTRODE - DETECTION

Next: End

BLOCKED - NOT ESTABLISHING

BURNER ASSEMBLY

Next: End

BLOCKED - NOT ESTABLISHING

INJECTOR

Next: End

NO IGNITION - LOW PRESSURE - MODUREG

GAS VALVE - HONEYWELL

Next: End

NOT CHANGING GAS VALVE VOLTAGE - DOES NOT IGNITE

PCB - COMBINED - PACTROL

Next: End

NOT ESTABLISHING - LOW PRESSURE - MODUREG

GAS VALVE - HONEYWELL

Next: End

NOT ESTABLISHING - NOT CHANGING GAS VALVE VOLTAGE

PCB - COMBINED - PACTROL

Next: End

BOILER DOES NOT REACT TO CH DEMAND OPEN CIRCUIT TO EXTERNAL CONTROLS

Next: End

BOILER DOES NOT REACT TO CH DEMAND

PCB - CHECK JUMPER

Next: End

BOILER DOES NOT REACT TO CH DEMAND NOT RECOGNISING DEMAND

PCB - COMBINED - PACTROL

Next: End

OVERHEAT INVESTIGATION CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

OVERHEAT INVESTIGATION DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

NOT ESTABLISHING

HARNESS - IGNITION

Next: End

OPEN CIRCUIT - OVERHEAT INVESTIGATION

HARNESS NO 6 - 9 - CLOCK

Next: End

BOILER DOES NOT REACT TO CH DEMAND

HARNESS NO 6 - 9 - CLOCK

Next: End

SHORT CIRCUIT ON MAINS - FUSE INVESTIGATION

HARNESS NO 1 - 5 - MAINS INLET

Next: End

SHORT CIRCUIT MOTOR - FUSE INVESTIGATION

TIMER

Next: End

SHORTED MODULATING SOLNEOID - FUSE INVESTIGATION

GAS VALVE - HONEYWELL

Next: End

NO SPARKING - POOR CONDITION

ELECTRODE - IGNITION (FROM SN FGX)

Next: End

NO SPARKING

HARNESS - IGNITION

Next: End

NO SPARKING - POOR CONDITION

IGNITION ASSEMBLY - OUTER (UP TO SN FG...)

Next: End

NO SPARKING - OPEN CCT

IGNITION ASSEMBLY - OUTER (UP TO SN FG...)

Next: End

INSUFFICIENT DHW FLOW RATE

BALL VALVE 15MM

Next: End

BLOCKED

PIPE - HIGH / LOW PRESSURE DHW

Next: End

DHW NOT MAKING

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

INSUFFICIENT PRESSURE

WATER SUPPLY

Next: End

FAN DOES NOT RUN DHW SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

FAN DOES NOT RUN CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW TOO COOL CH SENSOR

THERMISTOR 10 OHM - CROSSLAND

Next: End

DHW RUNS THEN SAFETY LED LIT

HARNESS NO10-15 240V

Next: End

DHW RUNS THEN SAFETY LED LIT - BLOCKED

TUBE 10MM - CLEAR SILICONE

Next: End

DHW RUNS HOT COLD - WATERWAYS RESTRICTED

HEAT EXCHANGER

Next: End

DHW RUNS HOT COLD - MINIMUM WRONG

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT COLD

INLET PRESSURE

Next: End

DHW RUNS HOT COLD - MODUREG

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT COLD - VOLTAGE TO GAS VALVE INCORRECT

PCB - COMBINED - PACTROL

Next: End

DHW RUNS THEN SAFETY LED LIT - FLUEWAYS RESTRICTED

HEAT EXCHANGER

Next: End

DHW RUNS THEN SAFETY LED LIT - BLOCKED

FLUE

Next: End

DHW RUNS THEN SAFETY LED LIT - BLOCKED

FAN VENTURI

Next: End

PUMP PROVING DIAPHRAGM SAFETY LED LIT

KIT - SERVICE - WATER PRESSURE SWITCH

Next: End

PUMP MICROSWITCH MOVING SLOWLY

KIT - SERVICE - WATER PRESSURE SWITCH / WEEP TUBE

Next: End

NO IGNITION - LOW PRESSURE

INLET PRESSURE

Next: End

NO IGNITION - NO PRESSURE

INLET PRESSURE

Next: End

BLOCKED - NO IGNITION

BURNER ASSEMBLY

Next: End

NOT ESTABLISHING

INLET PRESSURE

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

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 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

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

NO PUMP OVERRUN

PCB - COMBINED - PACTROL

Next: End

RUNNING SLOW - BOILER UP TO TEMP RADIATORS COOL

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

SHORTED - FUSE INVESTIGATION

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

SHORTED - FUSE INVESTIGATION

COMBI FAN ASSEMBLY

Next: End

SHORTED - FUSE INVESTIGATION

GAS VALVE - HONEYWELL

Next: End

DHW MODULATION

GAS VALVE - HONEYWELL

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

RUNNING SLOW - DHW RUNS HOT COLD

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

FIRING WITH NO DEMAND

FROST PROTECTION

Next: End

DHW STUCK MADE

MICROSWITCH ASSEMBLY

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

NO POWER TO PCB

Next: End

MAINS FUSE BLOWN

Z REDIRECT

Next: End

F2 FUSE BLOWN

Z REDIRECT

Next: End

FAULTY LED

PCB - COMBINED - PACTROL

Next: End

F1 FUSE BLOWN

Z REDIRECT

Next: End

POWER ON LED NOT ILLUMINATED

PCB - COMBINED - PACTROL

Next: End

NOT RUNNING

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

SHORT CIRCUIT TO APS

HARNESS NO10-15 240V

Next: End

SHORTED

PRESSURE SWITCH - AIR

Next: End

SEIZED

COMBI FAN ASSEMBLY

Next: End

NO POWER TO FAN

PCB - COMBINED - PACTROL

Next: End

BLOCKED OVERHEAT INVESTIGATION

PRESSURE GAUGE 4 BAR

Next: End

OVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

TRIPPING EARLY - OVERHEAT INVESTIGATION

THERMOSTAT - OVERHEAT CUT-OFF

Next: End

OVERHEAT INVESTIGATION - NOT SHUTTING DOWN

PCB - COMBINED - PACTROL

Next: End

NO FAULT FOUND

OVERHEAT

Next: End

BLOCKED SAFETY LED LIT

PRESSURE GAUGE 4 BAR

Next: End

PUMP PROVING SPINDLE SAFETY LED LIT

SYSTEM PRESSURE

Next: End

NOT MAKING PUMP PROVING SWITCH SAFETY LED LIT

PUMP 6M - GRUNDFOS UPS 15/16

Next: End

NOT SWITCHING - SAFETY LED LIT

PRESSURE SWITCH - AIR

Next: End

RUNNING SLOW - SAFETY LED LIT

COMBI FAN ASSEMBLY

Next: End

OPEN CIRCUIT TO OVERHEAT

HARNESS NO10-15 240V

Next: End

SAFETY LED LIT - CH THERMISTOR

HARNESS NO16-31 24V

Next: End

SAFETY LET LIT

PCB - COMBINED - PACTROL

Next: End

OPEN CIRCUIT TO PUMP PROVING MICROSWITCH SAFETY LED LIT

HARNESS NO16-31 24V

Next: End

FIRING WITH NO DEMAND

PCB - COMBINED - PACTROL

Next: End

CH MODULATION

PCB - COMBINED - PACTROL

Next: End

CUTTING OUT / MODULATING EARLY - BOILER AND RADIATOR TEMPERATURE LOW

PCB - COMBINED - PACTROL

Next: End

DHW TOO COOL - MODUREG

HARNESS NO16-31 24V

Next: End

DHW TOO COOL

GAS VALVE ADJUSTMENT

Next: End

DHW TOO COOL

GAS VALVE - HONEYWELL

Next: End

OPEN CIRCUIT TO GAS VALVE

HARNESS NO10-15 240V

Next: End

NO IGNITION NO PRESSURE

GAS VALVE - HONEYWELL

Next: End

NOT SWITCHING - OVERHEAT INVESTIGATION

Next: End

NOT SWITCHING ON - OVERHEAT INVESTIGATION

TIMER

Next: End

OVERHEAT INVESTIGATION

Next: End

OVERHEAT INVESTIGATION - MODUREG

HARNESS NO16-31 24V

Next: End

OVERHEAT INVESTIGATION

GAS VALVE ADJUSTMENT

Next: End

OVERHEAT INVESTIGATION

GAS VALVE - HONEYWELL

Next: End

OVERHEAT INVESTIGATION - MINIMUM WRONG

GAS VALVE ADJUSTMENT

Next: End

NOT RECOGNISING FLAME

PCB - COMBINED - PACTROL

Next: End

NO IGNITION - LOW PRESSURE - MODUREG

HARNESS NO16-31 24V

Next: End

NO IGNITION - LOW PRESSURE

GAS VALVE - HONEYWELL

Next: End

NOT ESTABLISHING - LOW PRESSURE - MODUREG

HARNESS NO16-31 24V

Next: End

NOT ESTABLISHING - LOW PRESSURE

GAS VALVE - HONEYWELL

Next: End

BOILER DOES NOT REACT TO CH DEMAND

Next: End

BOILER DOES NOT REACT TO CH DEMAND NOT SWITCHING ON

TIMER

Next: End

NOT ESTABLISHING - OPEN CIRCUIT

ELECTRODE - DETECTION (FROM SN FG...)

Next: End

SHORT CIRCUIT - FUSE INVESTIGATION

PCB - COMBINED - PACTROL

Next: End

SHORT CIRCUIT - FUSE INVESTIGATION

HARNESS NO 6 - 9 - CLOCK

Next: End

FUSE INVESTIGATION MODULATING SOLENOID

HARNESS NO16-31 24V

Next: End

FURTHER INVESTIGATION

FUSE BLOWN

Next: End

NO SPARKING - 3 TOTAL

PCB - COMBINED - PACTROL

Next: End

NO SPARKING - OPEN CCT

ELECTRODE - IGNITION (FROM SN FGX)

Next: End

NO SPARKING - 2 TOTAL

PCB - COMBINED - PACTROL

Next: End

NOT ESTABLISHING - OPEN CIRCUIT

IGNITION ASSEMBLY - OUTER (UP TO SN FG...)

Next: End

NOT MOVING DHW SPINDLE

DIAPHRAGM - DIVERTER VALVE

Next: End

NOT MOVING SPINDLE

CHAMBER - DHW DIAPHRAGM

Next: End

DHW SPINDLE NOT MOVING

KIT - DIVERTER VALVE SERVICE

Next: End

PUMP DOES NOT RUN

REGULATOR

Next: End

PUMP DOES NOT RUN

KIT - SANITARY WATER SERVICE

Next: End

OPEN CIRCUIT TO DHW MICROSWITCH

HARNESS NO16-31 24V

Next: End

CH THERMISTOR

HARNESS NO16-31 24V

Next: End

OBSERVATION PUMP RUNS

PCB - COMBINED - PACTROL

Next: End

DHW THERMISTOR

HARNESS NO16-31 24V

Next: End

FAN DOES NOT RUN

PCB - COMBINED - PACTROL

Next: End

RESTRICTED - LOW FLOW RATE

PLATE HEAT EXCHANGER - ALFA LAVAL

Next: End

DHW RUNS THEN SAFETY LED LIT - NOT SWITCHING

PRESSURE SWITCH - AIR

Next: End

RESTRICTED - DHW RUNS HOT COLD

PLATE HEAT EXCHANGER - ALFA LAVAL

Next: End

DHW RUNS HOT COLD - BURNER PRESSURE OK

PCB - COMBINED - PACTROL

Next: End

DHW RUNS HOT COLD - MINIMUM WRONG

GAS VALVE ADJUSTMENT

Next: End

DHW RUNS HOT COLD - MODUREG

HARNESS NO16-31 24V

Next: End

DHW RUNS HOT COLD

GAS VALVE ADJUSTMENT

Next: End

DHW RUNS HOT COLD

GAS VALVE - HONEYWELL

Next: End

RESTRICTED

REGULATOR

Next: End

DHW RUNS THEN SAFETY LED LIT - RUNNING SLOW

COMBI FAN ASSEMBLY

Next: End

DHW FILTER RESTRICTED

KIT - SANITARY WATER SERVICE

Next: End

OPEN CIRCUIT TO PCB

HARNESS NO 1 - 5 - MAINS INLET

Next: End

BLOCKED - NO IGNITION

INJECTOR

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 HOT

PCB - COMBINED - PACTROL

Next: End

EXCESSIVE PRESSURE RISE

FLEXIBLE HOSE

Next: End

BOILER UP TO TEMP RADIATORS COOL

Next: End

SHORTED - FUSE INVESTIGATION

HARNESS NO10-15 240V

Next: End

SHORT CIRCUIT TO GAS VALVE - FUSE INVESTIGATION

HARNESS NO10-15 240V

Next: End

SHORT CIRCUIT TO FAN - FUSE INVESTIGATION

HARNESS NO10-15 240V

Next: End

NOT MODULATING ON DHW

PCB - COMBINED - PACTROL

Next: End

DHW MODULATION

GAS VALVE ADJUSTMENT

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

FIRING WITH NO DEMAND

TAP

Next: End

BOILER UP TO TEMP RADS COOL

TAP

Next: End

SHORT CIRCUIT TO DHW MICROSWITCH

HARNESS NO16-31 24V

Next: End

STUCK OUT - FIRING WITH NO DEMAND

KIT - DIVERTER VALVE SERVICE

Next: End

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

FAN RUNS BUT PUMP DOES NOT

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p1276

PUMP RUNS BUT FAN DOES NOT

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p1285

PUMP AND FAN RUN THEN SAFETY LED ILLUMINATES

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p1307

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1339

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1341

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL CH

Next: p1357

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL CH

Next: p1645

OVERHEAT TRIPS BEFORE 82°C

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1377

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

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1379

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1506

PRESSURE LOW BUT INCREASES WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

Next: !p1508

MINIMUM PRESSURE CORRECT BUT MAXIMUM PRESSURE WRONG

CHARACTERISTIC TEST FROM PRESSURE BURNER MAX AND MIN

Next: p1663

MAXIMUM PRESSURE CORRECT BUT MINIMUM PRESSURE WRONG

CHARACTERISTIC TEST FROM PRESSURE BURNER MAX AND MIN

Next: p1675

NEITHER PUMP OR FAN RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP AND FAN RUNS

Next: p1866

DHW DIAPHRAGM DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1873

SPINDLE OR CHAMBER HOUSING DAMAGED / WORN

CHARACTERISTIC TEST FROM INSPECTION DHW DIAPHRAGM

Next: !p1875

REGULATOR RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p1881

FILTER / VENTURI RESTRICTED OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FILTER AND REGULATOR

Next: !p1883

PUMP RUNS BUT FAN DOES NOT

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p1898

DHW RUNS FOR A SHORT PERIOD THEN SAFETY LED ILLUMINATES

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1920

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

MINIMUM PRESSURE CORRECT BUT MAXIMUM PRESSURE WRONG

CHARACTERISTIC TEST FROM PRESSURE BURNER MAX AND MIN

Next: p1942

MAXIMUM PRESSURE CORRECT BUT MINIMUM PRESSURE WRONG

CHARACTERISTIC TEST FROM PRESSURE BURNER MAX AND MIN

Next: p1944

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

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

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

SYSTEM PRESSURE READS CORRECTLY BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SYSTEM

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 INSPECTION PRESSURE SYSTEM

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: p1230

BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p808

20/09/2018 09:37:18 1809_1_50_1 24/10/2018 08:07:39

01/10/2018 15:11:23

Next: End

INSPECTION DHW DIAPHRAGM

DHW SYSTEM ISOLATED AND DRAINED

Next: !p1014, ?1023, ?1025

VOLTAGE MAINS POWER IN AT PCB

GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: p1247, f1966

RESISTANCE FUSE (MAINS FUSE)

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p1249, f1250

FUSE FURTHER INVESTIGATION

Next: !p1251, !f1252

FUSE FURTHER INVESTIGATION

Next: !p1257, !f1273

FUSE FURTHER INVESTIGATION

Next: !p1270, !f1274

RESISTANCE AIR PRESSURE SWITCH AT PCB (NORMALLY CLOSED)

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p1302, f1289

RESISTANCE AIR PRESSURE SWITCH AT APS (NORMALLY CLOSED)

DISCONNECT WIRE MARKED COM OR C FROM THE AIR PRESSURE SWITCH

Next: !p1290, f1291

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p1292, !f1293

INSPECTION PUMP PROVING SPINDLE

Next: p1502, f1503

INSPECTION PRESSURE SYSTEM

Next: p1504, ?1505, ?1507

RESISTANCE AIR PRESSURE SWITCH WITH KIT AT PCB

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p1515, f1516

RESISTANCE HARNESS AIR PRESSURE SWITCH

DISCONNECT RIGHT HAND PLUG FROM THE PCB

Next: !p1517, !f1518

RESISTANCE OVERHEAT

DISCONNECT 1 WIRE FROM THE OVERHEAT THERMOSTAT

Next: !p1529, !f1530

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: !p1533, !f1534

RESISTANCE MICROSWITCH PUMP PROVING

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

Next: !p1537, !f1538

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT

Next: p1611, !f1612

RESISTANCE GAS VALVE MODUREG

DISCONNECT WHITE WIRES FROM GAS VALVE MODUREG

Next: !p1615, !f1616

VOLTAGE GAS VALVE MODUREG AT MAXIMUM

Next: !p1619, !f1620

RESISTANCE GAS VALVE MAIN SOLENOID

DISCONNECT LEAD FROM GAS VALVE

Next: !p1638, !f1639

RESISTANCE HARNESS EXTERNAL CONTROLS

DISCONNECT LEFT HAND PLUG (PINS 1-5) FROM THE PCB

Next: p1648, !f1649

RESISTANCE GAS VALVE MODUREG

DISCONNECT WHITE WIRES FROM GAS VALVE MODUREG

Next: !p1668, !f1669

VOLTAGE GAS VALVE MODUREG AT MAXIMUM

Next: !p1672, !f1673

RESISTANCE GAS VALVE MODUREG

DISCONNECT WHITE WIRES FROM GAS VALVE MODUREG

Next: !p1698, !f1699

RESISTANCE GAS VALVE MODUREG

DISCONNECT WHITE WIRES FROM GAS VALVE MODUREG

Next: !p1706, !f1707

OBSERVATION LINK OUT EXTERNAL CONTROLS

FIT A WIRE LINK BETWEEN THE TWO RIGHT HAND TERMINALS AT THE MAINS INLET TERMINAL BLOCK

Next: !p1711, f1712

RESISTANCE HARNESS EXTERNAL CONTROLS

DISCONNECT LEFT HAND PLUG (PINS 1-5) FROM THE PCB

Next: p1713, !f1714

OBSERVATION TYPE OF ELECTRODE

PLEASE SELECT WHICH TYPE OF IGNITION / DETECTION ELECTRODES ARE FITTED TO THE APPLIANCE.

Next: !p1863, f1829

RESISTANCE RECTIFICATION LEAD

DISCONNECT RECTIFICATION LEAD FROM THE PCB AND FROM THE RECTIFICATION ELECTRODE

Next: !p1833, !f1834

RESISTANCE MAINS INTO BOILER AT TERMINAL BLOCK

DISCONNECT PLUG FOR PINS 1-5 FROM THE PCB

Next: p1839, !f1840

RESISTANCE CLOCK MOTOR

DISCONNECT RED WIRES FROM THE CLOCK

Next: !p1843, !f1844

RESISTANCE GAS VALVE MODUREG

DISCONNECT WHITE WIRES FROM GAS VALVE MODUREG

Next: !p1847, !f1849

OBSERVATION TYPE OF ELECTRODE

PLEASE SELECT WHICH TYPE OF IGNITION / DETECTION ELECTRODES ARE FITTED TO THE APPLIANCE.

Next: p1851, f1852

INSPECTION SPARK ELECTRODES (3 TOTAL)

Next: p1853, !f1854

RESISTANCE IGNITION LEADS (3 TOTAL)

REMOVE ELECTRODE LEADS FROM SPARK GENERATOR

Next: !p1857, !f1858

INSPECTION ISOLATION VALVE DHW

Next: p188, !f187

INSPECTION DHW SPINDLE

SET FLOW RATE TO 2.8 LITRES A MINUTE

Next: p1869, f1870

INSPECTION DHW DIAPHRAGM

DHW SYSTEM ISOLATED AND DRAINED

Next: p1871, ?1872, ?1874

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: !p1888, !f1889

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p1892, !f1893

RESISTANCE HARNESS AIR PRESSURE SWITCH

DISCONNECT RIGHT HAND PLUG FROM THE PCB

Next: !p1923, !f1924

TEMPERATURE DIFFERENTIAL CH

ATTACH A TEMPERATURE

Next: !p1937, !f1938

RESISTANCE GAS VALVE MODUREG

DISCONNECT WHITE WIRES FROM GAS VALVE MODUREG

Next: !p1951, !f1952

VOLTAGE GAS VALVE MODUREG AT MAXIMUM

Next: !p1955, !f1956

VOLTAGE MAINS POWER IN AT TERMINAL BLOCK

Next: !p1974, f1248

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT

Next: p1703, !f287

TEMPERATURE DIFFERENTIAL CH

ATTACH A TEMPERATURE

Next: !p493, !f494

RESISTANCE MAINS INTO BOILER

REPLACE DAMAGED FUSE(S)

Next: p674, f1838

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 MAIN SOLENOID

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: !p1564, !f718

INSPECTION DHW SPINDLE (NO DEMAND)

Next: p817, f822

OBSERVATION ISOLATE DHW

REMOVE LOWER PANEL FROM APPLIANCE
TURN DHW ISOLATION VALVE OFF

Next: !p823, f994

OBSERVATION ISOLATE DHW

REMOVE LOWER PANEL FROM APPLIANCE
TURN DHW ISOLATION VALVE OFF

Next: !p892, f1013

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 DOES PUMP / FAN RUN

Next: p1261, f1246

RESISTANCE FUSE F1 (PCB)

GAIN ACCESS TO INSIDE OF PCB HOUSING (6X SCREWS)
REMOVE FUSE F1 FROM ITS HOLDER

Next: p1264, f1269

INFORMATION FAULTY LED

TESTS CARRIED OUT HA

Next: !p1262, !f1263

RESISTANCE FUSE F2 (PCB)

REMOVE FUSE F2 FROM ITS HOLDER

Next: !p1272, f1256

VOLTAGE PUMP AT PCB

Next: p1277, !f1278

VOLTAGE PUMP AT PUMP

REMOVE PUMP COVER

Next: !p1280, !f1281

VOLTAGE FAN AT PCB

Next: p1286, f1287

VOLTAGE FAN AT FAN

GAIN ACCESS TO FAN

Next: !p1300, !f1301

INSPECTION FAN VENTURI

REMOVE FAN ASSEMBLY

Next: !p1294, !f1295

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p1303, !f1304

OBSERVATION OVERHEAT TRIPPED

Next: p1308, f1501

OVERHEAT FURTHER INVESTIGATION

ENSURE APPLIANCE IS

Next: p1334, !f1335

INSPECTION PRESSURE SYSTEM

Next: p1336, ?1338, ?1340

PUMP LIMPET

Next: p1721, !f1343

INSPECTION EXTERNAL BYPASS

Next: p1344, !f1345

PRESSURE BURNER MAX AND MIN

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
DHW TEMPERATURE SET TO MAX

Next: p1346, ?1662, ?1674

TEMPERATURE DIFFERENTIAL CH

ATTACH A TEMPERATURE

Next: p1354, ?1356, ?1358

TEMPERATURE DIFFERENTIAL DHW

ATTACH A TEMPERATURE

Next: p1372, !f1373

TEMPERATURE DIFFERENTIAL DHW

ATTACH A TEMPERATURE

Next: !p1657, !f1369

OBSERVATION RUN BOILER UP TO TEMPERATURE

ATTACH TEMPERATURE P

Next: p1374, ?1376, ?1378

OBSERVATION PUMP OVERRUN

CH TEMPERATURE SET TO MAX

Next: !p1382, !f1383

VOLTAGE AIR PRESSURE SWITCH AT PCB

Next: p1513, f1514

INSPECTION PUMP PROVING DIAPHRAGM

DRAIN BOILER PRIMARY CIRCUIT
UNCLIP PUMP PROVING SWITCH

Next: !p1509, !f1975

RESISTANCE OVERHEAT AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p1527, f1528

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p1519, !f1520

INSPECTION FAN VENTURI

REMOVE FAN ASSEMBLY

Next: p1521, !f1522

INSPECTION HEAT EXCHANGER

Next: p1523, !f1524

INSPECTION FLUE

Next: !p1525, !f1526

RESISTANCE SENSOR CH AND HARNESS

DISCONNECT RIGHT HAND PLUG FROM PCB

Next: p1531, f1532

RESISTANCE MICROSWITCH PUMP PROVING AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: !p1535, f1536

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p806, !f1551

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: !p1573, !f1571

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: p1903, !f1609

RESISTANCE GAS VALVE MODUREG AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p1613, f1614

ADJUSTMENT PRESSURE MAX

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
DHW TEMPERATURE SELECTOR SET TO MAX

Next: !p1617, f1618

RESISTANCE GAS VALVE MAIN SOLENOID AND HARNESS

DISCONNECT PLUG FOR PINS 10-15 FROM THE PCB

Next: p237, f1637

OBSERVATION LINK OUT EXTERNAL CONTROLS

FIT A WIRE LINK BETWEEN THE TWO RIGHT HAND TERMINALS AT THE MAINS INLET TERMINAL BLOCK

Next: !p1646, f1647

OBSERVATION IS INTERNAL TIMER FITTED

Next: p1650, !f1651

OBSERVATION LINK OUT INTEGRAL TIMER

REMOVE PCB FROM APPL

Next: p1652, !f1653

RESISTANCE HARNESS CLOCK

GAIN ACCESS TO CLOCK WIRING
DISCONNECT ORANGE WIRES FROM THE CLOCK

Next: !p1654, !f1835

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT

Next: p1664, !f1665

RESISTANCE GAS VALVE MODUREG AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p1666, f1667

ADJUSTMENT PRESSURE MAX

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
DHW TEMPERATURE SELECTOR SET TO MAX

Next: !p1670, f1671

ADJUSTMENT PRESSURE MIN

ATTACH U-GAUGE TO BU

Next: !p1676, !f1677

INSPECTION RECTIFICATION ELECTRODE

GAIN ACCESS TO BURNER

Next: p1680, !f1681

RESISTANCE RECTIFICATION LEAD AND ELECTRODE

GAIN ACCESS TO AND D

Next: p1682, f1827

INSPECTION BURNER

Next: p1688, !f1687

INSPECTION INJECTOR

REMOVE BURNER ASSEMBLY

Next: !p1689, !f1690

RESISTANCE GAS VALVE MODUREG AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p235, f1697

RESISTANCE GAS VALVE MODUREG AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p1704, f1705

VOLTAGE GAS VALVE MODUREG AT IGNITION

Next: !p1708, !f1709

OBSERVATION IS INTERNAL TIMER FITTED

Next: p1715, !f1716

OBSERVATION LINK OUT INTEGRAL TIMER

REMOVE PCB FROM APPL

Next: p1717, !f1718

RESISTANCE HARNESS CLOCK

GAIN ACCESS TO CLOCK WIRING
DISCONNECT ORANGE WIRES FROM THE CLOCK

Next: !p1719, !f1837

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p1774, !f1773

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: p1342, !f1826

RESISTANCE CLOCK MOTOR AND HARNESS

REMOVE PCB FROM APPLIANCE
DISCONNECT PLUG FOR PINS 6-9 FROM THE PCB

Next: !p1841, f1842

RESISTANCE GAS VALVE MODUREG AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: !p1848, f1846

INSPECTION SPARK ELECTRODES (2 TOTAL)

Next: p1859, !f1860

RESISTANCE IGNITION LEADS AND ELECTRODES (3 TOTAL)

REMOVE PCB FROM APPLIANCE
REMOVE ELECTRODE LEADS FROM SPARK GENERATOR ON THE PCB

Next: !p1855, f1856

RESISTANCE IGNITION LEADS AND ELECTRODE (2 TOTAL)

REMOVE PCB FROM APPLIANCE
REMOVE ELECTRODE LEADS FROM SPARK GENERATOR ON THE PCB

Next: !p1861, !f1862

RESISTANCE MICROSWITCH DHW AND HARNESS

SET FLOW RATE TO 2.8 LITRES A MINUTE
DISCONNECT RIGHT HAND PLUG FROM THE PCB

Next: p1867, f1868

RESISTANCE SENSOR CH AND HARNESS

DISCONNECT RIGHT HAND PLUG FROM PCB

Next: p1886, f1887

RESISTANCE MICROSWITCH DHW

REMOVE THE PLASTIC C

Next: !p1884, !f1885

INSPECTION DHW DIFFERENTIAL PIPES

DHW SYSTEM ISOLATED AND DRAINED

Next: p1876, !f1877

INSPECTION DHW FILTER AND REGULATOR

DHW SYSTEM ISOLATED AND DRAINED

Next: !p1878, ?1880, ?1882

OBSERVATION FLOW RATE INTO BOILER

Next: p189, !f190

RESISTANCE SENSOR DHW AND HARNESS

DISCONNECT RIGHT HAND PLUG FROM THE PCB

Next: !p1890, f1891

INSPECTION DHW FILTER AND REGULATOR

DHW SYSTEM ISOLATED AND DRAINED

Next: !p191, ?192, ?194

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p1899, !f1900

RESISTANCE SENSOR DHW

DISCONNECT PLUG FROM DHW SENSOR

Next: !p1901, !f1902

RESISTANCE SENSOR CH

DISCONNECT PLUG FROM CH SENSOR

Next: p483, !f1917

RESISTANCE AIR PRESSURE SWITCH WITH KIT AT PCB

DISCONNECT CONNECTOR X6 FROM THE PCB

Next: p1921, f1922

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p1957, !f1926

TEMPERATURE DIFFERENTIAL DHW

ATTACH A TEMPERATURE

Next: p1935, f1936

PRESSURE BURNER MAX AND MIN

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
DHW TEMPERATURE SET TO MAX

Next: !p1939, ?1941, ?1943

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT

Next: p1947, !f1948

ADJUSTMENT PRESSURE MIN

ATTACH U-GAUGE TO BU

Next: !p1945, !f1946

RESISTANCE GAS VALVE MODUREG AND HARNESS

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p1949, f1950

ADJUSTMENT PRESSURE MAX

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
DHW TEMPERATURE SELECTOR SET TO MAX

Next: !p1953, f1954

INSPECTION HEAT EXCHANGER

Next: p1958, !f1959

INSPECTION FLUE

Next: p1963, !f1961

INSPECTION FAN VENTURI

REMOVE FAN ASSEMBLY

Next: !p1965, !f1964

OBSERVATION SPARKING AT ELECTRODES

IF APPLIANCE HAS LEA

Next: p229, f1850

PRESSURE IGNITION

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: p230, ?231, ?233

INSPECTION BURNER

Next: !p260, !f261

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT

Next: p1691, !f236

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT

Next: p1621, !f238

VOLTAGE GAS VALVE MODUREG AT IGNITION

Next: !p1701, !f1702

VOLTAGE GAS VALVE AT PCB

Next: !p1643, !f1644

PRESSURE IGNITION

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: p1679, f286

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: p1596, f484

PRESSURE BURNER MAXIMUM

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT
DHW TEMPERATURE SET TO MAX

Next: !p485, f1610

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: p1934, !f527

INSPECTION DHW SPINDLE (NO DEMAND)

Next: p589, f889

INSPECTION CH POTENTIOMETER

Next: p1565, !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

RESISTANCE FAN AND HARNESS

DISCONNECT PLUG FOR PINS 10-15 FROM THE PCB

Next: p672, f688

RESISTANCE GAS VALVE MAIN SOLENOID AND HARNESS

DISCONNECT PLUG FOR PINS 10-15 FROM THE PCB

Next: p1845, f691

RESISTANCE PUMP AND HARNESS

DISCONNECT PLUG FOR PINS 10-15 FROM THE PCB

Next: p671, f685

ADJUSTMENT PRESSURES MAX AND MIN

ATTACH U-GAUGE TO BU

Next: !p710, !f711

RESISTANCE MICROSWITCH DHW AND HARNESS (OPEN)

DISCONNECT RIGHT CONNECTOR FROM PCB (16-31)

Next: p1539, f807

OBSERVATION DISCONNECT EXTERNAL CONTROLS

DISCONNECT THE EXTER

Next: !p1554, !f1555

TEMPERATURE AMBIENT

Next: p805, !f812

RESISTANCE MICROSWITCH DHW (OPEN)

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

Next: !p901, !f902

System Information

  • Total Tests: 460
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control