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:

4126721 FERROLI MAXIMA 35 S

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

CASE REMOVAL

Next: &38, !f2

F1 - NO BURNER IGNITION (DUMMY, GO TO BURNER IGNITES)

OUTSIDE MODEL

Next: &nff, !f96

F2 - FLAME DETECTED WITH THE BURNER OFF ||| F8 - FLAME CIRCUIT FAULT

OUTSIDE MODEL

Next: &nff, f466

F3 - 100°C SAFETY THERMOSTAT TRIPS

OUTSIDE MODEL

Next: &nff, f473

F5 - FAN FAULT

OUTSIDE MODEL

Next: &nff, f479

F9 - NO COMMUNICATION BETWEEN THE FULL AUTO AND THE GAS VALVE

OUTSIDE MODEL

Next: &nff, f481

F10 TO F22, F25, F35, F36 PCB INTERNAL FAULTS

OUTSIDE MODEL

Next: &nff, f486

F26 - NO FLAME AFTER THE IGNITION PHASE (5 TIMES IN 4 MIN) (DUMMY, GO TO BURNER IGNITES)

OUTSIDE MODEL

Next: &nff, !f788

F30, F31 - CH FLOW SENSOR FAULT

OUTSIDE MODEL

Next: &nff, f495

F34 - SUPPLY VOLTAGE UNDER 190V OR OVER 250V

OUTSIDE MODEL

Next: &nff, f97

F37 - INCORRECT SYSTEM WATER PRESSURE (TOO LOW)

OUTSIDE MODEL

Next: &nff, f549

F40 - INCORRECT SYSTEM WATER PRESSURE (TOO HIGH)

OUTSIDE MODEL

Next: &nff, f561

F41 - PRESSURE SENSOR FAULT, F47 - PRESSURE SENSOR NOT CONNECTED

OUTSIDE MODEL

Next: &nff, f535

F45, F46 - FLUE SENSOR FAULT

OUTSIDE MODEL

Next: &nff, f528

F43, F44 - RETURN SENSOR FAULT

OUTSIDE MODEL

Next: &nff, f521

F23 - NOT APPLICABLE TO UK MARKETS

OUTSIDE MODEL

Next: &nff, f489

FUSE INVESTIGATION TREE - MAINS

OUTSIDE MODEL

Next: &nff, f21

OBSERVATION DISPLAY OPERATES

{ONOFFSWITCHON}

Next: &302, f339

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &86, !f85

OBSERVATION PUMP RUNS

Next: &120, f100

00 AND SPANNER SYMBOL

OUTSIDE MODEL

Next: &nff, f93

OBSERVATION FAN RUNS

Next: &137, f1030

OBSERVATION BURNER IGNITION AND ESTABLISH

Next: &364, ?138, ?140, ?142, ?144, ?146

OBSERVATION BOILER SELF CHECK

ENSURE POWER IS TURN

Next: &84, ?305, ?315, ?1019

OPERATION CH

Next: &620, ?371, ?464, ?650, ?1163

OBSERVATION CH MODULATION

Next: &542, f461

OBSERVATION FAN AND PUMP OVERRUN

Next: &nff, !f435

OPERATION DHW

Next: &434, ?543, ?545

FLUE GAS ANALYSIS

Next: &433, f715

INFORMATION HOW TO CHECK PUMP OVERRUN PARAMETER

Next: &nff, !f1008

INFORMATION HOW TO ADJUST MAX CH TEMPERATURE

Next: &nff, !f1114

FUSE INVESTIGATION TREE - DISPLAY

OUTSIDE MODEL

Next: &nff, f1212

WEAK SPARK POOR IGNITION

PCB - MAIN

Next: End

POOR IGNTION

PARAMETERS IGNITION FAN SPEED

Next: End

EXPLOSIVE IGNITION

ELECTRODE IGNITION

Next: End

EXPLOSIVE IGNITION

IGNITION ELECTRODE INTERNAL

Next: End

INFORMATION HOW TO CHECK PUMP OVERRUN PARAMETER

Z REDIRECT

Next: End

FAULT CODES 3

Z REDIRECT

Next: End

F30 F31

SENSOR - FLOW RETURN

Next: End

F43 F44

SENSOR - FLOW RETURN

Next: End

OPERATION CH

EXPANSION VESSEL - 10 LITRE

Next: End

OBSERVATION SELF CHECK - 00 AND SPANNER SYMBOL

HARNESS

Next: End

OBSERVATION SELF CHECK - 00 AND SPANNER SYMBOL - MAIN PCB

HARNESS

Next: End

F23 - WONT GO INTO UK MARKET

PCB - MAIN

Next: End

OBSERVATION FAN

SET - CONTROL

Next: End

OBSERVATION FAN RUNS - FLOW

SENSOR - FLOW RETURN

Next: End

OBSERVATION FAN RUNS - RETURN

SENSOR - FLOW RETURN

Next: End

OBSERVATION FAN RUNS

SENSOR - FLUE

Next: End

OBSERVATION PUMP RUNS - RELAY

HARNESS

Next: End

CAUSING BAFFLING - SEALS OR BLOCKED

FLUE

Next: End

DAMAGED CAUSING BAFFLING

BURNER - CERAMIC

Next: End

RESTRICTING HEAT EX CAUSING BAFFLING

INSULATION - COMBUSTION CHAMBER

Next: End

RESTRICTED OR BLOCKED BAFFLING

HEAT EXCHANGER

Next: End

OBSERVATION PUMP RUNS - DEMAND RECOGNISED

PCB - MAIN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - IGNITES BUT BAFFLES

AIR IMPULSE TUBE

Next: End

OBSERVATION PUMP RUNS - PUMP

HARNESS

Next: End

INFORMATION HOW TO ADJUST MAX CH TEMPERATURE

Z REDIRECT

Next: End

F3

SET - CONTROL

Next: End

F3 - NO POWER TO PUMP

PCB - MAIN

Next: End

F3 OBSERVATION PUMP RUNS - PUMP

HARNESS

Next: End

F9

PCB - MAIN

Next: End

OBSERVATION PUMP RUNS

TERMINAL BLOCK LINK

Next: End

OPERATION CH - TOO COOL OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

FILTER

Next: End

OPERATION CH - TOO COOL OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

VALVE - NON RETURN

Next: End

OPERATION CH - UP TO TEMP RADS COOL

ISOLATION VALVES

Next: End

OPERATION CH - UP TO TEMP RADS COOL

PUMP ASSEMBLY - CH

Next: End

OPERATION CH - UP TO TEMP RADS COOL

VALVE- BYPASS

Next: End

OPERATION CH - UP TO TEMP RADS COOL

Next: End

OBSERVATION PUMP RUNS - NO VOLTAGE TO EXTERNAL CONTROLS

Next: End

OPERATION CH - UP TO TEMP RADS COOL

FILTER

Next: End

OPERATION CH - UP TO TEMP RADS COOL

VALVE - NON RETURN

Next: End

FAN DC SECTION SHORTING - DISPLAY

HARNESS

Next: End

OPERATION CH - NOISY

SET - CONTROL

Next: End

OBSERVATION PUMP RUNS - RELAY - MAINS VOLTAGE

HARNESS

Next: End

OPERATION CH - TOO COOL

GAS INLET PRESSURE

Next: End

OPERATION CH - TOO COOL

FLUE

Next: End

OPERATION CH - TOO COOL

INJECTOR

Next: End

OPERATION CH - TOO COOL

NOZZLE AIR GAS MIXING CHAMBER

Next: End

OPERATION CH - TOO COOL

BURNER - CERAMIC

Next: End

OPERATION CH - TOO COOL

HEAT EXCHANGER

Next: End

OPERATION CH - TOO COOL - LPG

GAS INLET PRESSURE

Next: End

OPERATION CH - TOO COOL - LPG

FLUE

Next: End

OPERATION CH - TOO COOL OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL - LPG

FILTER

Next: End

OPERATION CH - TOO COOL OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL - LPG

VALVE - NON RETURN

Next: End

OPERATION CH - TOO COOL - LPG

INJECTOR

Next: End

OPERATION CH - TOO COOL - LPG

NOZZLE AIR GAS MIXING CHAMBER

Next: End

OPERATION CH - TOO COOL - LPG

BURNER - CERAMIC

Next: End

OPERATION CH - TOO COOL - LPG

HEAT EXCHANGER

Next: End

F3

PARAMETERS CH OUTPUT

Next: End

RESISTANCE HIGH OR POOR CONDITION 2

LEAD IGNITION W/O PLUG

Next: End

NOT SPARKING 2

ELECTRODE IGNITION

Next: End

NOT SPARKING

IGNITION LEAD END DAMAGED

Next: End

RESISTANCE HIGH OR POOR CONDITION

LEAD IGNITION W/O PLUG

Next: End

NOT SPARKING

IGNITION CAP

Next: End

NOT SPARKING

ELECTRODE IGNITION

Next: End

LOW CAUSING NO RECTIFICATION

GAS INLET PRESSURE

Next: End

LOW CAUSING BAFFLING

GAS INLET PRESSURE

Next: End

BLOCKED CAUSING BAFFLING

CONDENSATE TRAP

Next: End

RESTRICTED OR BLOCKED

UNIT - CONDENSE COLLECTION

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

PARTIALLY RESTRICTED CAUSING WRONG MIX

INJECTOR

Next: End

RESTRICTED OR BLOCKED 2

NOZZLE AIR GAS MIXING CHAMBER

Next: End

BLOCKED CAUSING HIGH FAN PRESSURE

CONDENSATE TRAP

Next: End

RESTRICTED HIGH FAN PRESSURE

UNIT - CONDENSE COLLECTION

Next: End

RESTRICTED CAUSING LOW FAN PRESSURE

FLUE

Next: End

RESTRICTED CAUSING HIGH FAN PRESSURE

BURNER - CERAMIC

Next: End

ONLY PARTIALLY OPENING GAS VALVE

AIR IMPULSE TUBE

Next: End

ONLY PARTIALLY OPENING GAS VALVE

CONDENSATE TRAP

Next: End

ONLY PARTIALLY OPENING GAS VALVE

UNIT - CONDENSE COLLECTION

Next: End

SHORTING

PUMP ASSEMBLY - CH

Next: End

NOT LIGHTING

ELECTRODE IGNITION

Next: End

PARTIAL RESTRICTION

INJECTOR

Next: End

RESTRICTED OR BLOCKED

NOZZLE AIR GAS MIXING CHAMBER

Next: End

NOT LIGHTING

IGNITION ELECTRODE INTERNAL

Next: End

CAUSING NO IGNITION

BURNER - CERAMIC

Next: End

BLOCKED STOPPING IGNITION

INJECTOR

Next: End

FUSE INVESTIGATION

VALVE C/W WASHERS - GAS

Next: End

SPLIT NOT OPENING GAS VALVE

AIR IMPULSE TUBE

Next: End

NOT RECTIFYING

RECTIFICATION LEAD

Next: End

NOT RECTIFYING

ELECTRODE - FLAME SENSING

Next: End

OBSERVATION DISPLAY ILLUMINATES - BOILER FIRES AFTER SELF CHECK

FROST PROTECTION

Next: End

OBSERVATION DISPLAY ILLUMINATES - BOILER FIRES AFTER SELF CHECK - FLOW

SENSOR - FLOW RETURN

Next: End

FAULT CODES 2

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE (MAINS)

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE (TERMINAL BLOCK) F2A

Next: End

OBSERVATION DISPLAY ILLUMINATES

SET - CONTROL

Next: End

NO SPARK

PCB - MAIN

Next: End

OBSERVATION FAN AND PUMP OVERRUN

PCB - MAIN

Next: End

OBSERVATION CH MODULATION

SENSOR - FLOW RETURN

Next: End

F2

RECTIFICATION LEAD

Next: End

F2

ELECTRODE - FLAME SENSING

Next: End

F3 - STUCK OPEN CIRCUIT

THERMOSTAT 100DEG C - OVERHEAT CUT-OFF

Next: End

F9

PCB - MAIN (FITMENT)

Next: End

F9

VALVE C/W WASHERS - GAS

Next: End

F10 TO F22 F25 F35 F36

PCB - MAIN

Next: End

F45 F46

SENSOR - FLUE

Next: End

F41 F47 NO VOLTAGE TO PRESSURE SENSOR

PCB - MAIN

Next: End

F41 F47

HARNESS

Next: End

F40

SENSOR - LOW WATER PRESSURE (BLOCKAGE)

Next: End

F37

SENSOR - LOW WATER PRESSURE (BLOCKAGE)

Next: End

F40

EXPANSION VESSEL - 10 LITRE

Next: End

F23

SENSOR - LOW WATER PRESSURE (BLOCKAGE)

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE (DISPLAY PCB) 3.15A

Next: End

OBSERVATION DISPLAY ILLUMINATES - BOILER FIRES AFTER SELF CHECK

Next: End

OBSERVATION BOILER SELF CHECK - BOILER FIRES AFTER SELF CHECK

RELAY

Next: End

FUSE INVESTIGATION

TRANSFORMER

Next: End

OBSERVATION DISPLAY ILLUMINATES

TRANSFORMER

Next: End

FAN DC SECTION SHORTING

HARNESS

Next: End

OPERATION CH - TOO COOL

PUMP ASSEMBLY - CH

Next: End

OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

PUMP ASSEMBLY - CH

Next: End

OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

VALVE- BYPASS

Next: End

OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

Next: End

OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

FILTER

Next: End

OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

VALVE - NON RETURN

Next: End

OPERATION CH - TOO COOL

PARAMETERS CH OUTPUT

Next: End

OPERATION CH - TOO COOL

SET - CONTROL

Next: End

PARTIALLY RESTRICTED CAUSING POOR FLUE GAS READINGS 3

INJECTOR

Next: End

RESTRICTED OR BLOCKED CAUING POOR FLUE GAS READINGS 3

NOZZLE AIR GAS MIXING CHAMBER

Next: End

CAUSING POOR FLUE GAS READINGS 3

FLUE

Next: End

DAMAGED CAUSING FLUE GAS FAIL 3

BURNER - CERAMIC

Next: End

RESTRICTING HEAT EX CAUSING POOR FLUE GAS READINGS3

INSULATION - COMBUSTION CHAMBER

Next: End

RESTRICTED OR BLOCKED CAUSING POOR FLUE GAS READINGS 2

HEAT EXCHANGER

Next: End

FLUE GAS ANALYSIS

GAS INLET PRESSURE

Next: End

OPERATION CH - TOO COOL - FLOW

SENSOR - FLOW RETURN

Next: End

OPERATION CH - TOO COOL - RETURN

SENSOR - FLOW RETURN

Next: End

OPERATION CH - TOO COOL

SENSOR - FLUE

Next: End

OPERATION CH - NOISY

PARAMETERS CH OUTPUT

Next: End

00 AND SPANNER SYMBOL - MAIN PCB

HARNESS

Next: End

F5 - NO PERM VOLTAGE TO FAN

PCB - CPD3 1 DISPLAY

Next: End

F5 - NO DEMAND VOLTAGE TO FAN

PCB - CPD3 1 DISPLAY

Next: End

F5 NO FAN

HARNESS

Next: End

F5 FAN RUNS

HARNESS

Next: End

F26

Z REDIRECT

Next: End

F3

ISOLATION VALVES

Next: End

F3

PUMP ASSEMBLY - CH

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

F3

SENSOR - FLUE

Next: End

F3 - RETURN

SENSOR - FLOW RETURN

Next: End

F3 - FLOW

SENSOR - FLOW RETURN

Next: End

F3

VALVE- BYPASS

Next: End

F3

Next: End

F3

FILTER

Next: End

F3

VALVE - NON RETURN

Next: End

OVERHEATING AFTER DEMAND

PCB - MAIN

Next: End

00 AND SPANNER SYMBOL

HARNESS

Next: End

F1

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

GAS INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

INJECTOR

Next: End

F34

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

NOZZLE AIR GAS MIXING CHAMBER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

FLUE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

BURNER - CERAMIC

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

INSULATION - COMBUSTION CHAMBER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

HEAT EXCHANGER

Next: End

WRONG MIX EXPLOSIVE IGNITION

VALVE C/W WASHERS - GAS

Next: End

FAULT CODES 1

Z REDIRECT

Next: End

F30 F31

HARNESS

Next: End

F43 F44

HARNESS

Next: End

OPERATION CH

EXPANSION VESSEL PIPE

Next: End

OBSERVATION SELF CHECK - 00 AND SPANNER SYMBOL

PCB - MAIN

Next: End

F23

PCB SETTING - UK MARKET

Next: End

OBSERVATION FAN RUNS - POTENTIOMETER FAULT

PCB - CPD3 1 DISPLAY

Next: End

OBSERVATION FAN RUNS - IGNORING SENSORS

PCB - MAIN

Next: End

WRONG MIX BAFFLING

VALVE C/W WASHERS - GAS

Next: End

OBSERVATION PUMP RUNS

PUMP ASSEMBLY - CH

Next: End

F3 - TEMPERATURE SETTING

PCB - CPD3 1 DISPLAY

Next: End

F3

NO FAULT FOUND OVERHEAT

Next: End

F3 - NOT RUNNING

PUMP ASSEMBLY - CH

Next: End

F9

Z REDIRECT

Next: End

OBSERVATION PUMP RUNS

Next: End

OPERATION CH - TOO COOL

PCB - MAIN

Next: End

OPERATION CH - UP TO TEMP RADS COOL

GAUGE - PRESSURE

Next: End

OBSERVATION PUMP RUNS - IGNORING DEMAND

PCB - CPD3 1 DISPLAY

Next: End

OPERATION CH

SYSTEM PRESSURE LOW

Next: End

OPERATION CH - UP TO TEMP RADS COOL

Next: End

DC SECTION SHORTING - DISPLAY

FAN ASSEMBLY

Next: End

FUSE INVESTIGATION - DISPLAY

PCB DISPLAY - FUSE

Next: End

OPERATION CH - NOISY

PCB - CPD3 1 DISPLAY

Next: End

OBSERVATION PUMP RUNS

RELAY

Next: End

OPERATION CH - TOO COOL - GAS RATE WRONG

PCB - MAIN

Next: End

OPERATION CH - TOO COOL - LPG

PCB - MAIN

Next: End

NOT SPARKING 2

IGNITION ELECTRODE INTERNAL

Next: End

NOT SPARKING

IGNITION ELECTRODE INTERNAL

Next: End

DROPPING AWAY COMPLETELY

GAS INLET PRESSURE

Next: End

CLOGGED SCROLL

FAN ASSEMBLY

Next: End

RESTRICTED HIGH PRESSURE

HEAT EXCHANGER

Next: End

PUMP SECTION SHORTING

HARNESS

Next: End

WRONG MIX NOT IGNITING

VALVE C/W WASHERS - GAS

Next: End

OBSERVATION BURNER IGNITION AND ESTABLISH - SPARKING NO IGNITION - DROP SEEN

VALVE C/W WASHERS - GAS

Next: End

NOT RECTIFYING

PCB - MAIN

Next: End

OBSERVATION DISPLAY ILLUMINATES - BOILER FIRES AFTER SELF CHECK - STUCK IN FROST

PCB - CPD3 1 DISPLAY

Next: End

PCB TAKING OUT FUSES

PCB - FUSE

Next: End

OBSERVATION DISPLAY ILLUMINATES

Next: End

OBSERVATION DISPLAY ILLUMINATES - MAINS FUSE

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES - PCB FUSE

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES - ON / OFF SWITCH

HARNESS

Next: End

OBSERVATION CH MODULATION

PCB - MAIN

Next: End

F2

Z REDIRECT

Next: End

F2

PCB - MAIN

Next: End

F3 - STUCK IN FAULT

PCB - MAIN

Next: End

F3 - OVERHEAT

HARNESS

Next: End

F10 TO F22 F25 F36 F36

Z REDIRECT

Next: End

F30 F31

PCB - MAIN

Next: End

F43 F44

PCB - MAIN

Next: End

F45 F46

PCB - MAIN

Next: End

F45 F46

HARNESS

Next: End

F41 F47

PCB - MAIN

Next: End

F41 F47

SENSOR - LOW WATER PRESSURE

Next: End

OPERATION DHW

Next: End

OPERATION DHW

Next: End

F37

GAUGE - PRESSURE

Next: End

F37

SYSTEM PRESSURE LOW

Next: End

F37 - IGNORING PRESSURE SENSOR

PCB - MAIN

Next: End

F40

GAUGE - PRESSURE

Next: End

F40

SYSTEM PRESSURE (TOO HIGH)

Next: End

F40 - STUCK IN FAULT

PCB - MAIN

Next: End

F40

SENSOR - LOW WATER PRESSURE

Next: End

F37

SENSOR - LOW WATER PRESSURE

Next: End

F40

F40 NO FAULT FOUND

Next: End

F23

GAUGE - PRESSURE

Next: End

F23

SYSTEM PRESSURE LOW

Next: End

F23

PCB - MAIN

Next: End

F23

SENSOR - LOW WATER PRESSURE

Next: End

OBSERVATION DISPLAY ILLUMINATES - NO DISPLAY

PCB - CPD3 1 DISPLAY

Next: End

OBSERVATION DISPLAY ILLUMINATES - BOILER FIRES AFTER SELF CHECK - FIRING NO DEMAND

PCB - CPD3 1 DISPLAY

Next: End

FUSE INVESTIGATION - TRANSFORMER

HARNESS

Next: End

OBSERVATION DISPLAY ILLUMINATES - TRANSFORMER

HARNESS

Next: End

DC SECTION SHORTING

FAN ASSEMBLY

Next: End

OPERATION CH - NOISYOPERATION CH - UP TO TEMP RADS COOL

GAUGE - PRESSURE

Next: End

OPERATION CH - NOISYOPERATION CH

SYSTEM PRESSURE LOW

Next: End

OPERATION CH - NOISY

HEAT EXCHANGER

Next: End

OPERATION CH - TOO COOL

PCB - CPD3 1 DISPLAY

Next: End

CAUSING POOR EMISSIONS OR BURNER DROP OUT 3

GAS VALVE ADJUSTMENT

Next: End

OBSERVATION DISPLAY ILLUMINATES - DISPLAY FUSE

Z REDIRECT

Next: End

00 AND SPANNER SYMBOL

PCB - MAIN

Next: End

F5 NO FAN

FAN ASSEMBLY

Next: End

F5

PCB - MAIN

Next: End

F5 FAN RUNS

FAN ASSEMBLY

Next: End

F3

GAUGE - PRESSURE

Next: End

F3

SYSTEM PRESSURE LOW

Next: End

F3

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

F3 - TRIPPING EARLY

THERMOSTAT 100DEG C - OVERHEAT CUT-OFF

Next: End

HOT SPOTS CAUSING OVERHEAT

HEAT EXCHANGER

Next: End

F34

PCB - MAIN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - EXPLOSIVE IGNITION

GAS VALVE ADJUSTMENT

Next: End

NO INFORMATION AND SPANNER FLASHING ON DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1021

BOILER REACHES TEMPERATURE, RADIATORS DO NOT HEAT OR ONLY GET WARM

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1164

PRESSURE OK BUT GAUGE DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p1168

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p1170

GAS RATE UNSATISFACTORY

Next: p1241

UNABLE TO GAS RATE (E G LPG INSTALLATION)

Next: p1254

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p139

BURNER IGNITES BUT THEN BAFFLES OR DROPS OUT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p141

BURNER IGNITES SMOOTHLY BUT FAILS TO ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p143

NO SPARKING OBSERVED

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p145

BURNER IGNITES BUT LIGHTS WITH EXPLOSIVE IGNITION

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p982

INLET PRESSURE SATISFACTORY BUT DOES NOT DIP DURING SPARKING

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: p215

INLET PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: !p217

FAN PRESSURE EXCESSIVELY LOW (E G 6MB)

CHARACTERISTIC TEST FROM PRESSURE FAN

Next: !p220

FAN PRESSURE EXCESSIVELY HIGH (E G 12MB OR GREATER)

CHARACTERISTIC TEST FROM PRESSURE FAN

Next: p222

AFTER SELF CHECK PUMP RUNS CONTINUALLY OR BOILER ATTEMPTS TO FIRE

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p306

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p316

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1016

BOILER AND RADIATORS REMAIN COOL - INSUFFICIENT BOILER OUTPUT

CHARACTERISTIC TEST FROM OPERATION CH

Next: p641

BOILER DOES NOT RESPOND TO DHW DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: !p544

BOILER RESPONDS TO DHW DEMAND BUT OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM OPERATION DHW

Next: !p546

PRESSURE OK BUT GAUGE DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p552

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p554

PRESSURE OK BUT GAUGE DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p564

SYSTEM PRESSURE TOO HIGH

CHARACTERISTIC TEST FROM PRESSURE SYSTEM (TOO HIGH)

Next: !p566

PRESSURE OK BUT GAUGE DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p582

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p584

BOILER NOISY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p652

PRESSURE OK BUT GAUGE DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p655

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p657

PRESSURE OK BUT GAUGE DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p792

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE SYSTEM

Next: !p794

OVERHEAT REOCCURS BEFORE REACHING TEMPERATURE

CHARACTERISTIC TEST FROM OBSERVATION PRIMARY HEAT EXCHANGER TEMPERATURE - OVERHEAT

Next: !p894

TEMPERATURE EXCEEDS 90 DEGREES WHEN DEMAND TURNED OFF

CHARACTERISTIC TEST FROM OBSERVATION PRIMARY HEAT EXCHANGER TEMPERATURE - OVERHEAT

Next: !p896

27/02/2019 15:17:59 1901_2_50_1 01/04/2019 14:05:21

28/02/2019 10:19:15

Next: End

OBSERVATION HAS BOILER RECOGNISED DEMAND

Next: p106, f111

OBSERVATION SET BOILER TO UK MARKET

Next: !p1027, !f1029

OBSERVATION CH TEMPERATURE SETTING

Next: p1031, f1032

INSPECTION CH CONTROL KNOB

Next: !p1033, !f1034

VOLTAGE EXTERNAL CONTROLS DEMAND INTO TERMINAL BLOCK

GAIN ACCESS TO MAINS TERMINAL BLOCK

Next: p115, f112

INSPECTION CH CONTROL KNOB

Next: !p1116, !f1117

VOLTAGE EXTERNAL CONTROLS SUPPLY FROM TERMINAL BLOCK

Next: !p114, !f113

VOLTAGE PUMP AT PCB

GAIN ACCESS TO MAIN PCB WIRING

Next: p1121, !f1122

VOLTAGE EXTERNAL CONTROLS SUPPLY FROM PCB

Next: p1041, !f118

RESISTANCE FAN AND HARNESS AND TO EARTH

REMOVE CONNECTOR X5 FROM THE DISPLAY PCB

Next: !p1217, f1214

RESISTANCE HARNESS FAN AND TO EARTH

DISCONNECT PLUG FROM FAN

Next: !p1215, !f1216

INSPECTION CH CONTROL KNOB

Next: !p1232, !f1233

RESISTANCE IGNITION LEAD (MODIFIED)

REMOVE THE IGNITION LEAD FROM THE MAIN PCB AND FROM THE SPARK ELECTRODE

Next: p170, !f171

RESISTANCE PUMP AND HARNESS AND TO EARTH

REMOVE CONNECTOR X1 FROM THE MAIN PCB

Next: p22, f23

RESISTANCE PUMP AND TO EARTH

REMOVE PLUG FROM THE PUMP

Next: !p24, !f25

VOLTAGE MAINS IN AFTER FUSE

GAIN ACCESS TO MAINS TERMINAL BLOCK

Next: p340, f341

VOLTAGE MAINS IN BEFORE FUSE

GAIN ACCESS TO MAINS TERMINAL BLOCK

Next: p342, f343

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: !p344, f345

FUSE FURTHER INVESTIGATION

Next: !p346, !f347

RESISTANCE HARNESS FAN AND TO EARTH

DISCONNECT PLUG FROM FAN

Next: !p618, !f619

RESISTANCE TRANSFORMER AND HARNESS

GAIN ACCESS TO DISPL

Next: p352, f353

RESISTANCE TRANSFORMER

DISCONNECT INLINE CONNECTOR AT TRANSFORMER

Next: !p616, !f617

RESISTANCE FLOW THERMISTOR AND HARNESS

REMOVE CONNECTOR X12 FROM THE MAIN PCB

Next: !p462, !f463

OBSERVATION BOILER RESET (F2)

Next: !p467, f468

RESISTANCE RECTIFICATION LEAD

REMOVE THE CONNECTOR

Next: p469, !f470

OBSERVATION BOILER RESET (OVERHEAT)

Next: p789, f474

RESISTANCE OVERHEAT STAT AND HARNESS

GAIN ACCESS TO MAIN PCB
DISCONNECT CONNECTOR X12 FROM THE MAIN PCB

Next: !p475, f476

RESISTANCE OVERHEAT STAT

DISCONNECT WIRES FRO

Next: !p477, !f478

OBSERVATION FAN RUNS

Next: p783, f776

INSPECTION MAIN PCB FITTED CORRECTLY

Next: p483, !f482

OBSERVATION BOILER RESET (INTERNAL FAULT)

Next: !p487, !f488

PRESSURE SYSTEM

Next: p490, ?581, ?583

RESISTANCE FLOW THERMISTOR AND HARNESS

REMOVE CONNECTOR X12 FROM THE MAIN PCB

Next: !p509, f512

RESISTANCE FLOW THERMISTOR

REMOVE THE TWO SPADE

Next: !p1013, !f1012

RESISTANCE RETURN THERMISTOR AND HARNESS

GAIN ACCESS TO MAIN PCB
DISCONNECT CONNECTOR X12 FROM THE MAIN PCB

Next: !p522, f523

RESISTANCE RETURN THERMISTOR

REMOVE THE TWO SPADE

Next: !p1015, !f1014

RESISTANCE FLUE THERMISTOR AND HARNESS

REMOVE CONNECTORS X11 AND X12 FROM THE MAIN PCB

Next: !p530, f529

RESISTANCE FLUE THERMISTOR

REMOVE THE TWO SPADE CONNECTORS FROM THE FLUE THERMISTOR

Next: !p533, !f534

VOLTAGE PRESSURE SENSOR (PRESSURE)

GAIN ACCESS TO DISPLAY PCB

Next: !p536, f537

VOLTAGE PRESSURE SENSOR (PERMANENT)

Next: p538, !f539

PRESSURE SYSTEM

Next: p550, ?551, ?553

PRESSURE SYSTEM (TOO HIGH)

Next: p562, ?563, ?565

VOLTAGE PRESSURE SENSOR (PRESSURE)

GAIN ACCESS TO DISPLAY PCB

Next: !p569, f570

INSPECTION PRESSURE SENSOR BLOCKAGE

DRAIN BOILER PRIMARY CIRCUIT
REMOVE PRESSURE SENSOR FROM APPLIANCE

Next: !p571, !f572

INSPECTION PRESSURE SENSOR BLOCKAGE

DRAIN BOILER PRIMARY CIRCUIT
REMOVE PRESSURE SENSOR FROM APPLIANCE

Next: !p574, !f575

INSPECTION PRESSURE SENSOR BLOCKAGE

DRAIN BOILER PRIMARY CIRCUIT
REMOVE PRESSURE SENSOR FROM APPLIANCE

Next: !p588, !f589

FUSE FURTHER INVESTIGATION - DISPLAY

Next: !p763, !f604

VOLTAGE EXTERNAL CONTROLS INTO TERMINAL BLOCK (NO DEMAND)

GAIN ACCESS TO MAINS TERMINAL BLOCK
ENSURE NO DEMANDS

Next: p609, !f612

RESISTANCE TRANSFORMER AND TO EARTH

DISCONNECT INLINE CONNECTOR AT TRANSFORMER

Next: !p615, !f614

INSPECTION CH CONTROL KNOB

Next: !p713, !f714

PRESSURE GAS INLET (OPERATION)

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p729, !f742

VOLTAGE FAN PERMANENT

GAIN ACCESS TO DISPLAY PCB

Next: p777, !f778

RESISTANCE HARNESS FAN

DISCONNECT PLUG FROM FAN

Next: !p786, !f787

INSPECTION INTERNAL BYPASS

Next: p878, !f879

RESISTANCE HARNESS X1 (DISPLAY PCB)

GAIN ACCESS TO BOTH PCBS
DISCONNECT X1 FROM THE DISPLAY PCB AND X11 FROM THE MAIN PCB

Next: p771, !f95

VOLTAGE MAINS IN (FAULT CODE)

GAIN ACCESS TO MAINS TERMINAL BLOCK

Next: !p98, !f99

INSPECTION INJECTOR

REMOVE THE INJECTOR FROM THE AIR / GAS MANIFOLD

Next: p987, !f988

INSPECTION ELECTRODE

REMOVE THE ELECTRODE ASSEMBLY FROM THE HEAT EXCHANGER

Next: p1003, !f1004

INSPECTION ELECTRODE INTERNAL

REMOVE BURNER ASSEMBLY

Next: !p1005, !f1006

FAULT CODE HISTORY

Next: !p1010, !f1011

PRESSURE EXPANSION VESSEL

DRAIN BOILER PRIMARY CIRCUIT

Next: !p1017, !f1018

RESISTANCE HARNESS X1 (DISPLAY PCB)

GAIN ACCESS TO BOTH PCBS
DISCONNECT X1 FROM THE DISPLAY PCB AND X11 FROM THE MAIN PCB

Next: p1022, !f1023

RESISTANCE HARNESS X1 (MAIN PCB)

REMOVE CONNECTOR X1 FROM THE MAIN PCB
DISCONNECT INLINE CONNECTOR RUNNING TO THE MAIN PCB

Next: !p1024, !f1025

RESISTANCE FLOW THERMISTOR

REMOVE THE TWO SPADE

Next: p1035, !f1036

RESISTANCE RETURN THERMISTOR

REMOVE THE TWO SPADE

Next: p1037, !f1038

RESISTANCE FLUE THERMISTOR

REMOVE THE TWO SPADE CONNECTORS FROM THE FLUE THERMISTOR

Next: !p1039, !f1040

RESISTANCE HARNESS RELAY - LOW VOLTAGE

DISCONNECT X2 FROM THE PCB
FOR EASIER ACCESS UNCLIP RELAY AND POSITION AS SHOWN

Next: p1234, !f1043

INSPECTION FLUE

Next: p196, !f1060

VOLTAGE PUMP AT PCB

GAIN ACCESS TO MAIN PCB WIRING

Next: p107, !f108

INSPECTION BURNER

REMOVE BURNER

Next: p1063, !f1064

INSPECTION INSULATION PADS

Next: p1065, !f1066

INSPECTION HEAT EXCHANGER

Next: !p1067, !f1068

INSPECTION AIR IMPULSE TUBE

Next: p1044, !f1085

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR X1 FROM THE MAIN PCB
REMOVE THE ELECTRICAL PLUG FROM THE PUMP

Next: !p109, !f110

OBSERVATION CH TEMPERATURE SETTING

Next: p1282, f1115

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR X1 FROM THE MAIN PCB
REMOVE THE ELECTRICAL PLUG FROM THE PUMP

Next: !p1123, !f1124

OBSERVATION BOILER RESET (F9)

Next: !p1126, !f1127

GAS RATE

Next: p1152, ?1237, ?1239

VOLTAGE EXTERNAL CONTROLS DEMAND INTO PCB

GAIN ACCESS TO DISPLAY PCB

Next: !p117, f116

INSPECTION FILTER

BOILER DRAINED AND DISCHARGED
REMOVE THE FILTER FITTED IN THE CENTRAL HEATING RETURN VALVE

Next: p1153, !f1154

INSPECTION NON-RETURN VALVE

BOILER DRAINED AND DISCHARGED

Next: !p1155, !f1156

PRESSURE SYSTEM

Next: p1165, ?1167, ?1169

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1171, !f1172

PUMP LIMPET TEST

Next: p1173, !f1174

INSPECTION INTERNAL BYPASS

Next: p1175, !f1176

INSPECTION EXTERNAL BYPASS

Next: p1177, !f1178

INSPECTION FILTER

BOILER DRAINED AND DISCHARGED
REMOVE THE FILTER FITTED IN THE CENTRAL HEATING RETURN VALVE

Next: p1179, !f1180

INSPECTION NON-RETURN VALVE

BOILER DRAINED AND DISCHARGED

Next: !p1181, !f1182

OBSERVATION CH TEMPERATURE SETTING

Next: p682, f1231

RESISTANCE HARNESS RELAY - MAINS VOLTAGE

FOR EASIER ACCESS UNCLIP RELAY AND POSITION AS SHOWN

Next: !p1235, !f1236

PRESSURE GAS INLET (OPERATION)

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p1242, !f1243

INSPECTION FLUE

Next: p1244, !f1245

INSPECTION INJECTOR

REMOVE THE INJECTOR FROM THE AIR / GAS MANIFOLD

Next: p1246, !f1247

INSPECTION NOZZLE AIR GAS MIXING

REMOVE THE FAN FROM

Next: p1248, !f1249

INSPECTION BURNER

REMOVE BURNER

Next: p1250, !f1251

INSPECTION HEAT EXCHANGER

Next: !p1252, !f1253

PRESSURE GAS INLET (OPERATION)

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p1255, !f1256

INSPECTION FLUE

Next: p1267, !f1258

INSPECTION FILTER

BOILER DRAINED AND DISCHARGED
REMOVE THE FILTER FITTED IN THE CENTRAL HEATING RETURN VALVE

Next: p1268, !f1269

INSPECTION NON-RETURN VALVE

BOILER DRAINED AND DISCHARGED

Next: p1273, !f1271

INSPECTION INJECTOR

REMOVE THE INJECTOR FROM THE AIR / GAS MANIFOLD

Next: p1274, !f1275

INSPECTION NOZZLE AIR GAS MIXING

REMOVE THE FAN FROM

Next: p1276, !f1277

INSPECTION BURNER

REMOVE BURNER

Next: p1278, !f1279

INSPECTION HEAT EXCHANGER

Next: !p1281, !f1280

INSPECTION CH OUTPUT PARAMETERS

Next: p834, !f1308

PRESSURE GAS INLET DROP

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p212, ?214, ?216

PRESSURE GAS INLET

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p194, !f195

PRESSURE GAS INLET

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p272, !f183

OBSERVATION SPARKING FROM PCB

{ONOFFSWITCHON}
D

Next: p166, !f358

OBSERVATION IGNITION LEAD

Next: p168, f169

INSPECTION IGNITION LEAD END

REMOVE THE CAP FROM THE SPARK ELECTRODE
UNSCREW IT ANTICLOCKWISE FROM THE IGNITION LEAD

Next: p174, !f175

INSPECTION ELECTRODE

REMOVE THE ELECTRODE ASSEMBLY FROM THE HEAT EXCHANGER

Next: !p172, !f173

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE MAIN PCB

Next: p176, !f177

RESISTANCE IGNITION CAP

Next: p178, !f179

INSPECTION ELECTRODE

REMOVE THE ELECTRODE ASSEMBLY FROM THE HEAT EXCHANGER

Next: !p180, !f181

INSPECTION CONDENSATE PIPE

Next: p1069, !f197

INSPECTION SUMP

REMOVE CONDENSATE TR

Next: p198, !f199

INSPECTION INJECTOR

REMOVE THE INJECTOR FROM THE AIR / GAS MANIFOLD

Next: p200, !f201

INSPECTION NOZZLE AIR GAS MIXING

REMOVE THE FAN FROM

Next: p1062, !f203

INSPECTION AIR IMPULSE TUBE

Next: p243, !f244

PRESSURE FAN

REMOVE THE AIR IMPUL

Next: p218, ?219, ?221

INSPECTION AIR IMPULSE TUBE

Next: p262, !f271

RESISTANCE GAS VALVE AND TO EARTH

REMOVE MAIN PCB FROM GAS VALVE

Next: p26, !f27

INSPECTION CONDENSATE PIPE

Next: p223, !f224

INSPECTION SUMP

REMOVE CONDENSATE TR

Next: p225, !f226

INSPECTION FLUE

Next: p227, !f228

INSPECTION BURNER

REMOVE BURNER

Next: !p229, !f230

INSPECTION CONDENSATE PIPE

Next: p245, !f246

INSPECTION SUMP

REMOVE CONDENSATE TR

Next: p247, !f248

INSPECTION ELECTRODE

REMOVE THE ELECTRODE ASSEMBLY FROM THE HEAT EXCHANGER

Next: p249, !f250

INSPECTION INJECTOR

REMOVE THE INJECTOR FROM THE AIR / GAS MANIFOLD

Next: p251, !f252

INSPECTION NOZZLE AIR GAS MIXING

REMOVE THE FAN FROM

Next: p253, !f254

INSPECTION ELECTRODE INTERNAL

REMOVE BURNER ASSEMBLY

Next: p255, !f256

INSPECTION BURNER

REMOVE BURNER

Next: !p257, !f258

RESISTANCE TRANSFORMER AND HARNESS AND TO EARTH

GAIN ACCESS TO DISPL

Next: p30, f62

INSPECTION INJECTOR

REMOVE THE INJECTOR FROM THE AIR / GAS MANIFOLD

Next: !p268, !f264

RESISTANCE RECTIFICATION LEAD

REMOVE THE CONNECTOR

Next: p286, !f284

INSPECTION RECTIFICATION ELECTRODE

REMOVE RECTIFICATION ELECTRODE

Next: !p301, !f298

RESISTANCE FAN AND HARNESS AND TO EARTH

REMOVE CONNECTOR X5 FROM THE DISPLAY PCB

Next: !p34, f35

OBSERVATION IS BOILER IN FROST PROTECTION MODE

Next: p307, f605

TEMPERATURE AMBIENT

REMOVE COMBUSTION CHAMBER IF YOU HAVE NOT ALREADY DONE SO

Next: p311, !f312

RESISTANCE FLOW THERMISTOR

REMOVE THE TWO SPADE

Next: !p313, !f314

FAULT CODES

THIS APPLIANCE INCORPORATES FAULT CODE HISTORY CLICK HERE FOR INSTRUCTIONS

Next: p1009, !f318

VOLTAGE TRANSFORMER INTO PCB

GAIN ACCESS TO DISPLAY PCB

Next: p600, f351

FUSE FURTHER INVESTIGATION

Next: !p348, !f349

RESISTANCE ON/OFF SWITCH

ON/OFF SWITCH SET TO ON (BUTTON PUSHED IN)

Next: !p356, !f357

INSPECTION RECTIFICATION ELECTRODE

REMOVE RECTIFICATION ELECTRODE

Next: !p471, !f472

RESISTANCE GAS VALVE AND TO EARTH

REMOVE MAIN PCB FROM GAS VALVE

Next: p1125, !f485

OBSERVATION IS BOILER SET TO UK MARKET

Next: p585, f1026

RESISTANCE HARNESS PRESSURE SENSOR

DISCONNECT X7 FROM THE DISPLAY PCB
REMOVE THE CONNECTOR FROM THE LOW PRESSURE SENSOR

Next: !p540, !f541

VOLTAGE PRESSURE SENSOR (PRESSURE)

GAIN ACCESS TO DISPLAY PCB

Next: !p555, f573

OBSERVATION BOILER RESET (F40)

Next: p567, f568

OBSERVATION SYSTEM PRESSURE RISE (F40)

BOILER CH THERMOSTAT TO MAX

Next: !p576, !f577

VOLTAGE PRESSURE SENSOR (PRESSURE)

GAIN ACCESS TO DISPLAY PCB

Next: !p586, f587

RESISTANCE DISPLAY PCB FUSE

REMOVE FUSE FROM DISPLAY PCB

Next: !p601, f602

VOLTAGE EXTERNAL CONTROLS INTO PCB (NO DEMAND)

ENSURE NO DEMANDS

Next: !p610, !f613

PUMP LIMPET TEST

Next: p694, !f649

PRESSURE SYSTEM

Next: p671, ?654, ?656

PUMP LIMPET TEST

Next: p1218, !f673

INSPECTION INTERNAL BYPASS

Next: p674, !f675

INSPECTION EXTERNAL BYPASS

Next: p676, !f677

INSPECTION FILTER

BOILER DRAINED AND DISCHARGED
REMOVE THE FILTER FITTED IN THE CENTRAL HEATING RETURN VALVE

Next: p678, !f679

INSPECTION NON-RETURN VALVE

BOILER DRAINED AND DISCHARGED

Next: !p693, !f681

INSPECTION CH OUTPUT PARAMETERS

Next: p672, !f764

OBSERVATION CH TEMPERATURE SETTING

Next: p703, f712

INSPECTION CH OUTPUT PARAMETERS

Next: p751, !f711

INSPECTION INJECTOR

REMOVE THE INJECTOR FROM THE AIR / GAS MANIFOLD

Next: p730, !f731

INSPECTION NOZZLE AIR GAS MIXING

REMOVE THE FAN FROM

Next: p732, !f733

INSPECTION FLUE

Next: p734, !f735

INSPECTION BURNER

REMOVE BURNER

Next: p736, !f737

INSPECTION INSULATION PADS

Next: p738, !f739

INSPECTION HEAT EXCHANGER

Next: !p740, !f741

RESISTANCE FLOW THERMISTOR

REMOVE THE TWO SPADE

Next: p752, !f753

RESISTANCE RETURN THERMISTOR

REMOVE THE TWO SPADE

Next: p754, !f755

RESISTANCE FLUE THERMISTOR

REMOVE THE TWO SPADE CONNECTORS FROM THE FLUE THERMISTOR

Next: p1128, !f757

RESISTANCE HARNESS X1 (MAIN PCB)

REMOVE CONNECTOR X1 FROM THE MAIN PCB
DISCONNECT INLINE CONNECTOR RUNNING TO THE MAIN PCB

Next: !p772, !f773

VOLTAGE FAN DEMAND

GAIN ACCESS TO DISPLAY PCB
DISCONNECT X1 FROM THE DISPLAY PCB

Next: p779, !f780

RESISTANCE HARNESS FAN

DISCONNECT PLUG FROM FAN

Next: !p781, !f782

VOLTAGE FAN HALL SENSOR

GAIN ACCESS TO DISPL

Next: !p784, f785

PRESSURE SYSTEM

Next: p790, ?791, ?793

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p807, !f796

PUMP LIMPET TEST

Next: p1086, !f798

OBSERVATION PUMP RUNS

Next: p795, f1120

RESISTANCE FLOW THERMISTOR

REMOVE THE TWO SPADE

Next: p844, !f866

RESISTANCE RETURN THERMISTOR

REMOVE THE TWO SPADE

Next: p854, !f865

RESISTANCE FLUE THERMISTOR

REMOVE THE TWO SPADE CONNECTORS FROM THE FLUE THERMISTOR

Next: p867, !f864

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE C

Next: p887, f877

INSPECTION EXTERNAL BYPASS

Next: p880, !f881

INSPECTION FILTER

BOILER DRAINED AND DISCHARGED
REMOVE THE FILTER FITTED IN THE CENTRAL HEATING RETURN VALVE

Next: p882, !f883

INSPECTION NON-RETURN VALVE

BOILER DRAINED AND DISCHARGED

Next: !p886, !f885

OBSERVATION FAN AND PUMP OVERRUN

Next: p888, !f889

OBSERVATION PRIMARY HEAT EXCHANGER TEMPERATURE - OVERHEAT

CH TEMPERATURE CONTROL KNOB SET TO MAX

Next: !p1119, ?893, ?895

PRESSURE GAS INLET (OPERATION)

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p983, !f984

FLUE GAS ANALYSIS

Next: p985, f986

OBSERVATION SPARKING FROM PCB

{ONOFFSWITCHON}
D

Next: p999, !f1000

INSPECTION NOZZLE AIR GAS MIXING

REMOVE THE FAN FROM

Next: p989, !f990

INSPECTION FLUE

Next: p991, !f992

INSPECTION BURNER

REMOVE BURNER

Next: p993, !f994

INSPECTION INSULATION PADS

Next: p995, !f996

INSPECTION HEAT EXCHANGER

Next: !p997, !f998

OBSERVATION CHECK IGNITION LEVEL IN PARAMETERS

Next: p1001, !f1002

System Information

  • Total Tests: 523
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control