XSol Diagnostic System

HALSTEAD FINEST / WICKES

GLOBALLY REPLACED

Next: &2, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

HALSTEAD FINEST / WICKES

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 09:20:25 1809_1_50_1 24/10/2018 08:06:51

01/10/2018 15:11:03

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

Welcome to the XSol Diagnostic System