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:

4704417 VAILLANT ECOMAX 828/2 E

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

4704417 VAILLANT ECOMAX 828/2 E - CASE REMOVAL INSTRUCTIONS

Next: &4178, !f219

OBSERVATION DISPLAY OPERATES

ON/OFF SWITCH ON
DHW AND CH THERMOSTATS TO MIN (FULLY ANTI-CLOCKWISE)

Next: &2042, ?2817, ?3327, ?3332, ?4254

DHW FLOW RATE

Next: &542, f104

OBSERVATION FAN RUNS

Next: &177, f1357

OBSERVATION BURNER IGNITION AND ESTABLISH

Next: &2498, ?183, ?185, ?187, ?3444

OPERATION DHW

Next: &444, ?278, ?280, ?282, ?284

OPERATION CH

CH THERMOSTAT SET TO MAX

Next: &501, ?440, ?442, ?3793

OBSERVATION CH DEMAND RECOGNISED

Next: &437, f1512

OBSERVATION WARMSTART OPERATION

ENSURE APPLIANCE PRIMARY CIRCUIT TEMPERATURE IS BELOW 40°C
TURN DHW THERMOSTAT FULLY CLOCKWISE

Next: &nff, ?503, ?505, ?4219

OBSERVATION DHW DEMAND RECOGNISED

TURN HOT WATER TAP O

Next: &554, f543

OBSERVATION DOES PUMP RUN

Next: &137, f3423

HEADER FOR F25 (LOW SYSTEM PRESSURE)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f3066

HEADER FOR F64 (SENSORS OR ELECTRONIC FAULT)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f3837

HEADER FOR F20, F22, F23, F24 (CIRCULATION / OVERHEAT ISSUES)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f2090

HEADER FOR F3 AND F13 (DHW SENSOR)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f762

HEADER FOR FAULT CODE F32, F34, F37 (FAN FAULT)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f856

HEADER FOR F60 AND F61 (GAS VALVE ELECTRICAL FAULT)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f1593

HEADER FOR FUSE INVESTIGATION

HEADER FOR FUSE INVESTIGATION - NOT USED

Next: &nff, f1607

VIEWING AND ADJUSTING DIAGNOSTIC CODES GUIDE

THE METHOD OF CHANGI

Next: &nff, !f1444

TYPE OF DIAGNOSTIC PROCEDURE

Next: &97, !f2043

PRESSURE GAS INLET (BURNER LIT AND ESTABLISHED)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: &277, !f2499

HEADER FOR F27, F62, F67 (FALSE FLAME / GAS VALVE PASSING)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f3237

HEADER FOR F1 AND F11 (RETURN SENSOR FAULT)

HEADER FOR FAULT CODE NOT USED

Next: &nff, f3890

HEADER FOR F0 AND F10 (FLOW SENSOR FAULT)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f3883

INSPECTION FLUE COLLECTOR AND SEALS

Next: &3, !f4179

HEADER FOR FAULT CODE F43

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f4249

BAFFLING OUT (BLOCKED)

PIPE - AIR - INLET

Next: End

BURNER BAFFLING

GAS INLET PRESSURE

Next: End

NOT OPERATING DIVERTER VALVE

PCB

Next: End

DIVERTER VALVE MOTOR

CABLE TREE

Next: End

POOR DHW FLOW

DHW ISOLATION VALVE

Next: End

DHW FLOW RATE

COLD WATER SUPPLY

Next: End

FAN DOES NOT RUN

PCB

Next: End

FAN DOES NOT RUN

CABLE TREE

Next: End

CALLING UP THE INSTALLER LEVEL

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE F32

PCB

Next: End

FAULT CODE F32 2

PCB

Next: End

FAULT CODE F32 1

PCB

Next: End

FAULT CODE F32

CABLE TREE

Next: End

FAULT CODE F61

GAS VALVE

Next: End

FAULT CODE F61

PCB

Next: End

F13

PCB

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z DIRECTION CHOICE OR CONTINUE

Next: End

F23 F24 F83 F84

SENSOR - NTC

Next: End

F23 F24 F83 F84

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

BLANK FOR CASE OFF

Z DIRECTION CHOICE OR CONTINUE

Next: End

TOO LOW

GAS INLET PRESSURE

Next: End

BAFFLING

HEAT EXCHANGER

Next: End

BAFFLING

BURNER

Next: End

BAFFLING

CONDENSATE TRAP, PIPEWORK OR EXTERNAL CONDENSATE DRAIN

Next: End

BAFFLING

FLUE ASSEMBLY

Next: End

BLOWN STAND BY MODE AT POWER UP

FUSE (MAINS)

Next: End

FAULT CODE F32 1

CABLE TREE

Next: End

F32

CABLE TREE

Next: End

FAULT CODE F68

CONDENSATE TRAP, PIPEWORK OR EXTERNAL CONDENSATE DRAIN

Next: End

FAULT CODE F68

FLUE ASSEMBLY

Next: End

FAULT CODE F68

IGNITION WIRE

Next: End

FAULT CODE F68

ELECTRODE IGNITION/MONITORING

Next: End

BLANK FOR FAULT CODES 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

FUSE F1

FUSE F1

Next: End

PCB MAIN

PCB

Next: End

S34

SENSOR - NTC

Next: End

S34

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

DHW SPINDLE SNAPPED

SET - 3 OFF - KNOBS

Next: End

FROST PROTECTION

SENSOR - NTC

Next: End

FROST PROTECTION

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FAULTY FROST PROTECTION

PCB

Next: End

SENSING DHW DEMAND WHEN NONE

PCB

Next: End

NO VOLTAGE TO PUMP

PCB

Next: End

STUCK

AQUA SENSOR - IMPELLER ONLY

Next: End

DC HALL SENSOR

CABLE TREE

Next: End

NOT IGNITING

CONDENSATE TRAP, PIPEWORK OR EXTERNAL CONDENSATE DRAIN

Next: End

BURNER NOT IGNITING

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

PCB AND GAS SECTION

Next: End

SPARKING BUT NOT LIGHTING

GAS VALVE

Next: End

HIGH FAN PRESSURE

PIPE - AIR - INLET

Next: End

RESTRICTED FAN PRESSURE

FLUE ASSEMBLY

Next: End

RESTRICTED FAN PRESSURE

BURNER

Next: End

RESTRICTED FAN PRESSURE

HEAT EXCHANGER

Next: End

FAN PRESSURE INCORRECT

FAN ASSEMBLY

Next: End

NOT IGNITING

ELECTRODE IGNITION/MONITORING

Next: End

RESTRICTED OR BLOCKED

AQUA SENSOR - IMPELLER ONLY

Next: End

NO DEMAND TO FAN

SENSOR - NTC

Next: End

NO DEMAND FOR FAN

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

NO FAN DEMAND DUE TO EXCESSIVE DIFFERENTIAL

PUMP

Next: End

NO DEMAND TO FAN DUE TO EXCESSIVE DIFFERENTIAL

FILTER PRIMARY CIRCUIT

Next: End

NO FAN DEMAND DUE TO EXCESSIVE DIFFERENTIAL

HEAT EXCHANGER - 12 PLATES - DHW

Next: End

DHW SPINDLE SNAPPED 2

SET - 3 OFF - KNOBS

Next: End

DHW SPINDLE SNAPPED 3

SET - 3 OFF - KNOBS

Next: End

DHW TOO COOL

SENSOR - NTC

Next: End

DHW TOO COOL

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

SLOW OR WEAK

PUMP

Next: End

DHW TOO COOL RADS COLD EXCESSIVE DIFFERENTIAL

FILTER PRIMARY CIRCUIT

Next: End

POOR HOT WATER

EXTERNAL MIXING

Next: End

DHW SPINDLE SNAPPED 4

SET - 3 OFF - KNOBS

Next: End

SHORTED TO EARTH

SENSOR - NTC

Next: End

OUT OF CALIBRATION

SENSOR - NTC

Next: End

OUT OF CALIBRATION 2

SENSOR - NTC

Next: End

RESTRICTED / BLOCKED

RUBBER TUBE / PIPE

Next: End

LIMITER TRIPPED

UNDERFLOOR HEATING

Next: End

NO VOLTAGE TO 24V CONTROLS 2

PCB

Next: End

NO VOLTAGE TO 24V CONTROLS3

PCB

Next: End

IGNITES BUT DOES NOT ESTABLISH

PIPE - AIR - INLET

Next: End

NOT ESTABLISHING

GAS INLET PRESSURE

Next: End

NOT RECTIFYING

IGNITION WIRE

Next: End

NOT RECTIFYING

ELECTRODE IGNITION/MONITORING

Next: End

CAUSING NO RECTIFICATION

BURNER

Next: End

NOT ESTABLISHING

CONDENSATE TRAP, PIPEWORK OR EXTERNAL CONDENSATE DRAIN

Next: End

FLAT

EXPANSION VESSEL 10L

Next: End

NO WARMSTART

SENSOR - NTC

Next: End

NO WARMSTART

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

PREVENTING WARMSTART

SENSOR - NTC

Next: End

UNABLE TO ADJUST DIAGNOSTIC CODE

PCB

Next: End

D000

ADJUSTMENT DIAGNOSTIC CODES

Next: End

CH STAYING TOO COOL

SENSOR - NTC

Next: End

CH STAYING TOO COOL

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

PASSING

GAS VALVE

Next: End

FAULT CODES

SENSOR - NTC

Next: End

FAULT CODES

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FAULT CODE F25

PCB

Next: End

F13

SENSOR - NTC

Next: End

NOT MAKING / RESTRICTED OR BLOCKED

SENSOR - PRESSURE

Next: End

BLOWING FUSE

PUMP

Next: End

BLOWING FUSE

FAN ASSEMBLY

Next: End

DIVERTER SECTION SHORTING

CABLE TREE

Next: End

F68

PCB

Next: End

F0 OR F10

SENSOR - NTC

Next: End

F1 OR F11

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

POOR HOT WATER

PIPE - AIR - INLET

Next: End

POOR HOT WATER

CONDENSATE TRAP, PIPEWORK OR EXTERNAL CONDENSATE DRAIN

Next: End

POOR HOT WATER

FLUE ASSEMBLY

Next: End

POOR HOT WATER

BURNER

Next: End

POOR HOT WATER

FAN ASSEMBLY

Next: End

POOR HOT WATER

HEAT EXCHANGER

Next: End

POOR HOT WATER UNABLE TO GAS RATE

PIPE - AIR - INLET

Next: End

POOR HOT WATER UNABLE TO GAS RATE

CONDENSATE TRAP, PIPEWORK OR EXTERNAL CONDENSATE DRAIN

Next: End

POOR HOT WATER UNABLE TO GAS RATE

FLUE ASSEMBLY

Next: End

POOR HOT WATER UNABLE TO GAS RATE

BURNER

Next: End

POOR HOT WATER UNABLE TO GAS RATE

FAN ASSEMBLY

Next: End

POOR HOT WATER UNABLE TO GAS RATE

HEAT EXCHANGER

Next: End

SPARKING

IGNITION WIRE

Next: End

DHW RUNS HOT THEN COLD

SENSOR - NTC

Next: End

DHW RUNS HOT THEN COLD

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

OUT OF CALIBRATION 3

SENSOR - NTC

Next: End

NOISY

PUMP

Next: End

NO VOLTAGE TO 24V CONTROLS

PCB

Next: End

RESTRICTED / BLOCKED 2

RUBBER TUBE / PIPE

Next: End

DHW RUNS HOT THEN COLD

FILTER PRIMARY CIRCUIT

Next: End

OVERHEAT

CHECK VALVE / SERVICE COCK - CH

Next: End

NO POWER TO PUMP OVERHEAT

PCB

Next: End

WEAK

PUMP

Next: End

PUMP DOES NOT OVERRUN

PCB

Next: End

NO POWER TO 24V CONTROLS F23 F24 F83 F84

PCB

Next: End

CLOSED TOO MUCH RAISING DIFFERENTIAL

Next: End

CLOSED TOO MUCH OR BLOCKED

AUTO BYPASS VALVE

Next: End

EXCESSIVE DIFFERENTIAL AND TEMP RISE FAULT CODE

FILTER PRIMARY CIRCUIT

Next: End

AIR IN APPLIANCE / SYSTEM

AIR / DE-AERATOR

Next: End

AIR IN APPLIANCE / SYSTEM 2

AIR / DE-AERATOR

Next: End

AIR IN APPLIANCE / SYSTEM 3

AIR / DE-AERATOR

Next: End

AIR IN BOILER / SYSTEM 4

AIR / DE-AERATOR

Next: End

TURNED OFF

CHECK VALVE / SERVICE COCK - CH

Next: End

NOT OPERATING DIVERTER VALVE CH

PCB

Next: End

DIVERTER VALVE MOTOR CH

CABLE TREE

Next: End

NOT OPENING TO RADS POSITION

VALVE - DIVERTER

Next: End

OPEN TOO MUCH SO RADS DONT HEAT

Next: End

BOILER TO TEMP RADS COLD

PUMP

Next: End

OPEN TOO MUCH SO BYPASSING RADS

AUTO BYPASS VALVE

Next: End

SPLIT / LEAKING

FLUE COLLECTOR / SEALS

Next: End

BLOWN

FUSE F2

Next: End

NO SUPPLY TO EXTERNAL CONTROLS

Next: End

NO POWER TO EXTERNAL CONTROLS 3

Next: End

NO POWER TO EXTERNAL CONTOLS 4

PCB

Next: End

NO VOLTAGE TO AQUA SENSOR

PCB

Next: End

CH SPINDLE SNAPPED

SET - 3 OFF - KNOBS

Next: End

DHW SPINDLE SNAPPED 5

SET - 3 OFF - KNOBS

Next: End

NO POWER TO 240V EXTERNAL CONTROLS

Next: End

F0 AND F10 NOT RESETTING

PCB

Next: End

F1 AND F11 NOT RESETTING

PCB

Next: End

F64 NOT RESETTING

PCB

Next: End

UNABLE TO ADJUST D71

PCB

Next: End

D71

ADJUSTMENT DIAGNOSTIC CODES

Next: End

F20 F22 F23 AND F24

RUBBER TUBE / PIPE

Next: End

CODING RESISTOR

CABLE TREE

Next: End

FAULT CODE F43

PCB

Next: End

SER DISPLAYED INCORRECTLY

PCB

Next: End

NO DEMAND TO FAN DUE TO EXCESSIVE DIFFERENTIAL

RUBBER TUBE / PIPE

Next: End

WARMSTART ISSUES

SENSOR - NTC

Next: End

WARMSTART ISSUES

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

TO AQUA SENSOR

CABLE TREE

Next: End

HEAT EXCHANGER - DHW

HEAT EXCHANGER - 12 PLATES - DHW

Next: End

FLOW LIMITER

LIMITER

Next: End

PASSING TO RADS

MOTOR - DIVERTER VALVE

Next: End

FILTER DHW

FILTER DHW

Next: End

BAFFLING

GAS VALVE

Next: End

NOT RUNNING WITH CORRECT VOLTAGES

FAN ASSEMBLY

Next: End

NOT RESPONDING TO 240V CONTROLS3

PCB

Next: End

F32

FAULT CODE RESET

Next: End

FAULT CODE F32

FAN ASSEMBLY

Next: End

FAULT CODE F61

CABLE TREE

Next: End

F61

FAULT CODE RESET

Next: End

F13

FAULT CODE RESET

Next: End

F13

CABLE TREE

Next: End

OVERHEAT DOES NOT RESET

PCB

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION MAINS

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE F32 1

FAN ASSEMBLY

Next: End

FAULT CODE F32 3

PCB

Next: End

BLANK FOR FAULT CODES

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION FUSE F1

Z DIRECTION CHOICE OR CONTINUE

Next: End

DISPLAY PCB

DISPLAY - PRINTED CIRCUIT

Next: End

OPERATION CORRECTLY

FROST PROTECTION - NORMAL OPERATION

Next: End

FAULTY DHW POTENTIOMETER ACTIVATING C

PCB

Next: End

TAP OPEN OR LEAKING DHW DRAW OFF

TAP OPEN OR LEAKING DHW DRAW OFF

Next: End

NOT SENSING DEMAND

SENSOR - HALL

Next: End

NOT RECOGNISING DEMAND

PCB

Next: End

HALL SENSOR SIGNAL

FAN ASSEMBLY

Next: End

NO VOLTAGE TO GAS VALVE

PCB

Next: End

BURNER DOES NOT IGNITE

PCB AND HARNESS

Next: End

SOLENOID NOT OPENING

GAS VALVE

Next: End

SPARKING BUT NOT LIGHTING

CABLE TREE

Next: End

INCORRECT MIX

GAS VALVE

Next: End

NO DEMAND TO FAN FROM PCB

PCB

Next: End

PASSING TO RADS

VALVE - DIVERTER

Next: End

NOT RESPONDING TO 240V CONTROLS 2

PCB

Next: End

DHW TOO COOL

PCB

Next: End

DHW SECTION SHORTED

CABLE TREE

Next: End

NOT CONTROLLING HW TEMP

PCB

Next: End

DHW SECTION OPEN CIRCUIT

CABLE TREE

Next: End

DHW TOO COOL

HEAT EXCHANGER - 12 PLATES - DHW

Next: End

DHW TOO COOL

HEAT EXCHANGER

Next: End

NOT RESPONDING TO 24V CONTROLS 2

PCB

Next: End

NOT RESPONDING TO CH DEMAND

Next: End

NOT RESPONDING TO 24V CONTROLS3

PCB

Next: End

NOT RESPONDING TO CH DEMAND3

Next: End

NOT RECOGNISING RECTIFICATION

PCB

Next: End

BLOCKED

PIPE CONNECTION

Next: End

NOT RECOGNISING WARM START FACILITY

PCB

Next: End

NOT HEATING ENOUGH ON WARMSTART

PCB

Next: End

DHW SECTION OPEN CIRCUIT 2

CABLE TREE

Next: End

RAD TEMP LOW

Z DIRECTION CHOICE OR CONTINUE

Next: End

CH REMAINING TOO COOL

PCB

Next: End

THERMISTOR FAULT CODES FLOW SENSOR

CABLE TREE

Next: End

THERMISTOR FAULT CODES RETURN SENSOR

CABLE TREE

Next: End

BLOCKED

MANOMETER

Next: End

LOW CAUSING F25

SYSTEM PRESSURE

Next: End

LOW PRESSURE SWITCH SECTION OPEN CIRCUIT

CABLE TREE

Next: End

FAN SECTION SHORTING

CABLE TREE

Next: End

BLANK DISPLAY

FUSE FURTHER INVESTIGATION

Next: End

BLOWING FUSE

MOTOR - DIVERTER VALVE

Next: End

FLOW SENSOR SECTION

CABLE TREE

Next: End

RETURN SENSOR SECTION

CABLE TREE

Next: End

POOR HOT WATER

GAS VALVE

Next: End

POOR HOT WATER UNABLE TO GAS RATE

PCB

Next: End

SPARKING

ELECTRODE IGNITION/MONITORING

Next: End

NOT SPARKING

PCB

Next: End

DHW RUNS HOT THEN COLD

PCB

Next: End

NOT RESPONDING TO 24V CONTROLS

PCB

Next: End

NOT RESPONDING TO CH DEMAND2

Next: End

NOT RESPONDING TO 240V CONTROLS

PCB

Next: End

DHW RUNS HOT THEN COLD

HEAT EXCHANGER

Next: End

NOISY

HEAT EXCHANGER - 12 PLATES - DHW

Next: End

DHW TOO COOLF23 F24 F83 F84

PCB

Next: End

NOT RESPONDING TO 24V CONTROLS2 F23 F24 F83 F84

PCB

Next: End

NOT RESPONDING TO CH DEMAND F23 F24 F83 F84

Next: End

NOT RESPONDING TO 240V CONTROLS 2F23 F24 F83 F84

PCB

Next: End

F23 F24 F83 F84

HEAT EXCHANGER - 12 PLATES - DHW

Next: End

BLOCKED 2

MANOMETER

Next: End

DHW RUNS HOT THEN COLD

SYSTEM PRESSURE

Next: End

BLOCKED 3

MANOMETER

Next: End

DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

BLOCKED 4

MANOMETER

Next: End

F23 F24 F83 F84

SYSTEM PRESSURE

Next: End

BLOCKED 5

MANOMETER

Next: End

BOILER TO TEMP RADS COOL

SYSTEM PRESSURE

Next: End

PASSING TO RADS CH

MOTOR - DIVERTER VALVE

Next: End

BOILER TO TEMP BUT RADS COOL

Next: End

NOT RUNNING

PUMP

Next: End

OVERHEAT

PUMP

Next: End

FUSE F2 FURTHER INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT RESPONDING TO CH DEMANDDEMAND RECOGNISED 3

Next: End

NOT RESPONDING TO CH DEMANDDEMAND RECOGNISED 2

Next: End

NOT RESPONDING TO CH DEMANDDEMAND RECOGNISED

Next: End

NOT RESPONDING TO CH DEMAND F23 F24 F83 F84

Next: End

FAULTY SENSOR OR WATER INGRESS

SENSOR - HALL (SHORTED)

Next: End

NOT RECOGNISING WARMSTART

PCB

Next: End

F0 AND F10

FAULT CODE RESET

Next: End

F1 AND F11

FAULT CODE RESET

Next: End

F25

FAULT CODE RESET

Next: End

F64

FAULT CODE RESET

Next: End

FALSE FLAME / PASSING GAS VALVE

FAULT CODE RESET

Next: End

MAXIMUM HEATING TEMPERATURE ADJUSTMENT BLANK

Z DIRECTION CHOICE OR CONTINUE

Next: End

F23 F24 F83 F84

HEAT EXCHANGER

Next: End

F43

FAULT CODE RESET

Next: End

SER DISPLAYED

SERVICE INTERVAL EXPIRED

Next: End

S53 OR S54 WAITING TIME

HEAT EXCHANGER

Next: End

LIMITER BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION FLOW LIMITER AND FILTER

Next: !p114

FILTER BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION FLOW LIMITER AND FILTER

Next: !p116

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS - FAULT CODE F32

Next: p1580

FAN RUNS BUT FAN RELATED FAULT CODE REOCCURS

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS - FAULT CODE F32

Next: p1582

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p3483

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p3780

BURNER IGNITES BUT BAFFLES OUT/NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p1106

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3548

TEMPERATURE RISE UNSATISFACTORY, RADIATORS REMAIN COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3568

DISPLAY DOES NOT OPERATE

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMINATES

Next: p2819

TEMPERATURE RISE UNSATISFACTORY, RADIATORS HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p283

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1752

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMINATES

Next: p3329

PUMP RUNS CONTINUOUSLY OR BOILER TRIES TO FIRE WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMINATES

Next: p3349

SPARKING DOES NOT OCCUR

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p3446

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p3747

BOILER DOES NOT RESPOND TO CENTRAL HEATING

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p3583

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p3795

PRESSURE CORRECT BUT DOES NOT INCREASE WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p3853

PRESSURE LOW BUT INCREASES WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p3855

GAS RATE INCORRECT

Next: p3906

UNABLE TO GAS RATE APPLIANCE I E LPG INSTALLATION OR NO METER

Next: p3919

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p3959

BOILER DOES NOT RESPOND TO CENTRAL HEATING

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p3961

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p3991

BOILER DOES NOT RESPOND TO CENTRAL HEATING

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p3993

PRESSURE CORRECT BUT DOES NOT INCREASE WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4010

PRESSURE LOW BUT INCREASES WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4012

PRESSURE CORRECT BUT DOES NOT INCREASE WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4015

PRESSURE LOW BUT INCREASES WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4017

PRESSURE CORRECT BUT DOES NOT INCREASE WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4020

PRESSURE LOW BUT INCREASES WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4022

PRESSURE CORRECT BUT DOES NOT INCREASE WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4156

PRESSURE LOW BUT INCREASES WHEN PRESSURE ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: !p4158

WARMSTART IS NOT RECOGNISED ON THE DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION WARMSTART OPERATION

Next: p4220

SER FLASHES ON DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMINATES

Next: p4255

BOILER UP TO TEMP RADS COLD

CHARACTERISTIC TEST FROM OPERATION CH

Next: p4153

BOILER AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p4206

WARMSTART IS RECOGNISED ON THE DISPLAY BUT DOES NOT OPERATE

CHARACTERISTIC TEST FROM OBSERVATION WARMSTART OPERATION

Next: p504

WARMSTART RECOGNISED AND OPERATES BUT DOES NOT HEAT SUFFICIENTLY

CHARACTERISTIC TEST FROM OBSERVATION WARMSTART OPERATION

Next: p506

21/05/2019 08:17:50 1905_1_50_1 01/07/2019 10:06:47

24/05/2019 15:24:10

Next: End

INSPECTION DHW ISOLATION VALVE

Next: p1257, !f1264

VOLTAGE DIVERTER VALVE

REMOVE CONNECTOR FROM THE DIVERTER VALVE AND MAKE SAFE
ENSURE NO DEMANDS
ON/OFF SWITCH OFF

Next: p1153, !f1151

VOLTAGE DC PWM DEMAND AT FAN

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1366, f3549

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p1523, f3775

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p1594, f1595

RESISTANCE GAS VALVE

REMOVE THE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p1596, !f1597

RESISTANCE PUMP AND HARNESS

REMOVE THE PUMP CONNECTOR FROM THE PCB

Next: p3869, !f3868

RESISTANCE DHW SENSOR

REMOVE THE CONNECTOR FROM THE DHW SENSOR

Next: !p1960, !f3862

RESET APPLIANCE - ENSURE APPLIANCE IS COOL

ENSURE NO DEMANDS ARE PRESENT
ENSURE APPLIANCE IS COOL

Next: p2097, f2140

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p2141, !f2142

RESISTANCE MAINS SUPPLY FUSE

REMOVE THE MAINS 3A FUSE FROM ITS HOLDER

Next: !p2822, f2823

FUSE FURTHER INVESTIGATION MAINS

Next: !p2824, !f2825

OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: p3851, ?3852, ?3854

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3163, !f3164

INSPECTION CONDENSATE PIPEWORK

Next: p3238, !f3242

FUSE FURTHER INVESTIGATION F1

Next: !p3378, !f3379

OBSERVATION C SHOWN

Next: p3406, f3403

INSPECTION SPINDLE DHW

GAIN ACCESS TO PCB
TURN THE DHW THERMOSTAT SO IT IS POINTING STRAIGHT UPWARDS

Next: !p3404, !f3405

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p4181, !f3425

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3449, !f3450

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p3491, f3492

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p3493, f3494

RESISTANCE GAS VALVE

REMOVE THE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p3495, !f3496

RESISTANCE GAS VALVE

REMOVE THE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p3499, !f3500

INSPECTION SPINDLE DHW

GAIN ACCESS TO PCB
TURN THE DHW THERMOSTAT SO IT IS POINTING STRAIGHT UPWARDS

Next: p3550, !f3565

PUMP LIMPET

Next: p3559, !f3560

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p3579, ?3580, ?3582

RESISTANCE DHW SENSOR

REMOVE THE CONNECTOR FROM THE DHW SENSOR

Next: !p3706, !f3707

RESISTANCE DHW SENSOR

REMOVE THE CONNECTOR FROM THE DHW SENSOR

Next: !p3712, !f3713

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3766, f3767

VOLTAGE TO 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3768, !f3769

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3776, f3777

VOLTAGE TO 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3778, !f3779

RESISTANCE DHW SENSOR

REMOVE THE CONNECTOR FROM THE DHW SENSOR

Next: !p3812, !f3813

ADJUSTMENT - HEATING OUTPUT

Next: p3817, !f3818

RESISTANCE FLOW SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3838, f3839

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: !p3840, !f3841

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3844, !f3845

RESISTANCE LOW PRESSURE SWITCH

REMOVE AIR INTAKE PIPE
REMOVE THE 2 BLACK WIRES FROM THE LOW PRESSURE SWITCH

Next: !p3858, !f3867

RESISTANCE FAN

REMOVE THE CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3872, !f3873

RESISTANCE DIVERTER VALVE HARNESS

REMOVE CONNECTOR X4 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE MOTOR

Next: !p3876, !f3877

RESISTANCE FLOW SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3884, f3885

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: !p3886, !f3887

RESISTANCE RETURN SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3891, f3892

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3893, !f3894

RESISTANCE IGNITION LEAD

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

Next: !p3944, !f3945

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p3957, ?3958, ?3960

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3964, f3965

VOLTAGE TO 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3966, !f3967

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p4183, !f3980

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p3989, ?3990, ?3992

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3996, f3997

VOLTAGE TO 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3998, !f3999

VOLTAGE DIVERTER VALVE

REMOVE CONNECTOR FROM THE DIVERTER VALVE AND MAKE SAFE
ENSURE NO DEMANDS
ON/OFF SWITCH OFF

Next: p4166, !f4167

FUSE FURTHER INVESTIGATION F2

Next: !p4189, !f4190

VOLTAGE TO 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p4192, !f4193

VOLTAGE TO 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p4195, !f4223

VOLTAGE TO 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p4198, !f4199

VOLTAGE TO 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p4201, !f4202

VOLTAGE TO AQUA SENSOR (DISCONNECTED)

DISCONNECT THE IN-LINE CONNECTOR TO THE AQUA SENSOR AND MAKE SAFE

Next: !p4204, !f4205

ADJUSTMENT MAXIMUM HEATING TEMPERATURE

Next: p4242, !f4241

RESISTANCE CODING RESISTOR

REMOVE CONNECTOR X2 FROM THE PCB

Next: p4250, !f4251

VOLTAGE DEMAND FROM AQUA SENSOR

{GAINPCBACS}
ENSURE A FLOW RATE ABOVE 2 LITRES PER MINUTE

Next: !p3443, f545

VOLTAGE TO AQUA SENSOR

Next: p546, f4203

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p1956, f1959

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: p891, !f1577

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p188, !f1070

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1050, !f1128

INSPECTION FLOW LIMITER AND FILTER

DHW SUPPLY ISOLATED AND DRAINED
REMOVE THE FLOW LIMITER AND FILTER FROM THE FLOW SENSOR ASSEMBLY

Next: !p112, ?113, ?115

RESISTANCE DIVERTER VALVE HARNESS

REMOVE CONNECTOR X4 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE MOTOR

Next: !p1154, !f1155

OBSERVATION COLD WATER SUPPLY

Next: p3539, !f1265

INSPECTION CONDENSATE PIPEWORK

Next: p1341, !f2627

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p1343, !f2626

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: !p1345, !f2625

VOLTAGE FAN 22VDC AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1374, !f1375

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1376, !f1377

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p1529, f4197

VOLTAGE DC PWM DEMAND AT FAN

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1583, !f1584

VOLTAGE FAN HALL SENSOR

{GAINPCBACS}

Next: p3161, f3162

VOLTAGE FAN 22VDC AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1585, !f1586

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1587, !f1588

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1598, !f1599

OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: p4087, ?4009, ?4011

INSPECTION FLUE

Next: p1340, !f2628

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1957, !f1958

OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: p4117, ?4019, ?4021

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p2143, !f2144

VOLTAGE MAINS POWER INPUT TO APPLIANCE

{GAINPCBACS}

Next: p3375, f2821

INSPECTION DIVERTER VALVE MOTOR OPERATION

REMOVE THE DIVERTER

Next: !p356, f1149

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3165, !f3166

INSPECTION FLUE

Next: p3239, !f3243

RESISTANCE IGNITION LEAD

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

Next: p3240, !f3244

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p3825, !f3245

FAULT CODES

Next: !p3330, !f3331

OBSERVATION STATUS CODE S34

Next: p3397, f3402

RESISTANCE FUSE F1

REMOVE FUSE F1 FROM ITS HOLDER ON THE PCB

Next: p4184, f3377

VOLTAGE DC DISPLAY PCB

{GAINPCBACS}
REMO

Next: !p3381, !f3382

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3398, !f3399

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3400, !f3401

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3407, !f3408

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p3409, !f3410

OBSERVATION DHW DEMAND INCORRECTLY RECOGNISED

HOT WATER TAPS OFF

Next: p3411, !f3412

OBSERVATION ISOLATE MAINS WATER - DOES DEMAND STOP ?

TURN OFF THE DHW ISOLATION VALVE

Next: !p3413, !f3414

INSPECTION FLOW TURBINE

DHW ISOLATED AND DRAINED

Next: !p3429, !f3430

VOLTAGE FAN HALL SENSOR

{GAINPCBACS}

Next: p3933, f3448

INSPECTION CONDENSATE PIPEWORK

Next: p3485, !f3484

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3489, !f3487

PRESSURE GAS INLET DROP

ATTACH A PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
ENSURE NO DEMANDS

Next: p3501, f3490

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p3497, f3498

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p3520, !f3503

INSPECTION FLUE

Next: p3530, !f3522

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p3524, !f3525

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: p3527, !f3526

INSPECTION FAN

Next: !p3528, !f3529

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p3523, !f3538

INSPECTION FLOW TURBINE

DHW ISOLATED AND DRAINED

Next: p111, !f3546

INSPECTION SPINDLE DHW

GAIN ACCESS TO PCB
TURN THE DHW THERMOSTAT SO IT IS POINTING STRAIGHT UPWARDS

Next: p3709, !f3567

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3551, !f3552

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p3553, !f3554

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3753, f3705

OBSERVATION STATUS CODE S53 OR S54

DHW THERMOSTAT SET TO 3 O'CLOCK POSITION

Next: !p3557, f3558

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: p3561, !f3562

INSPECTION PLATE HEAT EXCHANGER

DHW AND PRIMARY CIRCUIT ISOLATED AND DRAINED
REMOVE THE PLATE HEAT EXCHANGER

Next: p4258, !f3564

OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: p4023, ?4014, ?4016

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3571, !f3572

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p3615, !f3574

PUMP LIMPET

Next: p3575, !f3576

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p3577, f3578

GAS RATE

Next: p3599, ?3902, ?3904

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p3746, !f3598

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p3584, f3765

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3595, f4191

TEMPERATURE COMPARISON OF HOT WATER - EXTERNAL MIXING TEST

Next: !p3613, !f3614

RESISTANCE DHW SENSOR

REMOVE THE CONNECTOR FROM THE DHW SENSOR

Next: p3573, !f3708

INSPECTION SPINDLE DHW

GAIN ACCESS TO PCB
TURN THE DHW THERMOSTAT SO IT IS POINTING STRAIGHT UPWARDS

Next: p3569, !f3704

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p3710, f3711

INSPECTION FLOW PIPE / HOSES

PRIMARY CIRCUIT DRAI

Next: !p3748, !f3749

RESISTANCE UNDERFLOOR OVERHEAT THERMOSTAT

IF NO LINK IS FITTED

Next: p3555, !f3763

INSPECTION CONDENSATE PIPEWORK

Next: p3781, !f3792

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p3782, !f3783

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3784, !f3785

RESISTANCE IGNITION LEAD

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

Next: p3786, !f3787

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p3788, !f3789

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: !p3790, !f3791

PRESSURE EXPANSION VESSEL

APPLIANCE PRIMARY CIRCUIT DRAINED AND DISCHARGED

Next: !p3796, !f3797

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3806, !f3808

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3807, !f3809

OBSERVATION HEATING OUTPUT

ENSURE NO DEMANDS

Next: p4232, f3816

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3821, !f3822

D 0 NOW SET CORRECTLY

THE HEATING OUTPUT S

Next: !p3819, !f3820

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3823, !f3824

TIGHTNESS TEST INSTALLATION

Next: p3878, !f3827

RESISTANCE RETURN SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3847, f3843

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p4229, !f4230

RESISTANCE LOW PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3856, f3857

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p4228, !f3861

RESISTANCE FAN AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3870, f3871

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE CONNECTOR X4 FROM THE PCB

Next: !p3874, f3875

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p4231, !f3880

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p4224, !f4225

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p4226, !f4227

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p3907, !f3908

INSPECTION CONDENSATE PIPEWORK

Next: p3909, !f3910

INSPECTION FLUE

Next: p3911, !f3912

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p3913, !f3914

INSPECTION FAN

Next: p3915, !f3916

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: !p3917, !f3918

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p3920, !f3921

INSPECTION CONDENSATE PIPEWORK

Next: p3922, !f3923

INSPECTION FLUE

Next: p3924, !f3925

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p3926, !f3927

INSPECTION FAN

Next: p3928, !f3929

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: !p3932, !f3931

OBSERVATION SPARKING

REMOVE THE IGNITION

Next: !p3942, f3943

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3947, !f3948

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p3949, !f3950

RESISTANCE DHW SENSOR

REMOVE THE CONNECTOR FROM THE DHW SENSOR

Next: p3951, !f3952

PUMP LIMPET

Next: p3953, !f3954

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: !p3955, f3956

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p3972, !f3973

INSPECTION FLOW PIPE / HOSES

PRIMARY CIRCUIT DRAI

Next: !p3970, !f3971

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p3962, f3963

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p3968, f4194

INSPECTION FLOW AND RETURN VALVES

Next: p3975, !f3976

OBSERVATION DOES PUMP RUN

Next: p3977, f3978

PUMP LIMPET

Next: p3983, !f3984

OBSERVATION PUMP OVERRUN

Next: p3985, !f3986

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: !p3987, f3988

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p4006, !f4007

INSPECTION EXTERNAL BYPASS

Next: p4002, !f4003

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p3994, f3995

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p4000, f4200

INSPECTION INTEGRAL BYPASS

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE INTEGRAL BYPASS ASSEMBLY

Next: p4245, !f4005

INSPECTION AUTO AIR VENT / AIR PRESENT

Next: p3657, !f4086

INSPECTION AUTO AIR VENT / AIR PRESENT

Next: p3946, !f4116

INSPECTION AUTO AIR VENT / AIR PRESENT

Next: p3974, !f4152

OBSERVATION SYSTEM PRESSURE AND INCREASE

Next: p4154, ?4155, ?4157

INSPECTION AUTO AIR VENT / AIR PRESENT

Next: p4161, !f4160

INSPECTION FLOW AND RETURN VALVES

Next: p4162, !f4163

INSPECTION DIVERTER VALVE MOTOR OPERATION

REMOVE THE DIVERTER

Next: p4164, f4165

INSPECTION DIVERTER VALVE SPINDLE

REMOVE THE DIVERTER VALVE MOTOR FROM THE BODY

Next: p4170, !f4171

RESISTANCE DIVERTER VALVE HARNESS

REMOVE CONNECTOR X4 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE MOTOR

Next: !p4168, !f4169

INSPECTION EXTERNAL BYPASS

Next: p4172, !f4173

PUMP LIMPET

Next: p4174, !f4175

INSPECTION INTEGRAL BYPASS

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE INTEGRAL BYPASS ASSEMBLY

Next: !p4176, !f4177

RESISTANCE FUSE F2

REMOVE FUSE F1 FROM ITS HOLDER ON THE PCB

Next: p3380, f4188

INSPECTION SPINDLE CH

GAIN ACCESS TO PCB
TURN THE CH THERMOSTAT SO IT IS POINTING STRAIGHT UPWARDS

Next: p3814, !f4218

INSPECTION SPINDLE DHW

GAIN ACCESS TO PCB
TURN THE DHW THERMOSTAT SO IT IS POINTING STRAIGHT UPWARDS

Next: !p4221, !f4222

OBSERVATION MAXIMUM HEATING TEMPERATURE

ENSURE NO DEMANDS

Next: p3815, f4238

D 71 NOW SET CORRECTLY

THE HEATING TEMPERAT

Next: !p4243, !f4244

INSPECTION FLOW PIPE / HOSES

PRIMARY CIRCUIT DRAI

Next: !p4246, !f4247

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p4252, !f4253

OBSERVATION MAINTENANCE INTERVAL EXPIRED

Next: !p4256, !f4257

INSPECTION FLOW PIPE / HOSES

PRIMARY CIRCUIT DRAI

Next: !p4259, !f4260

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p3805, f3799

RESISTANCE FLOW SENSOR

REMOVE THE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p511, !f513

RESISTANCE RETURN SENSOR

REMOVE AIR INTAKE PIPE
REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3811, !f514

RESISTANCE HARNESS AQUA SENSOR

REMOVE THE CONNECTOR FROM THE AQUA SENSOR
REMOVE CONNECTOR X2 FROM THE PCB

Next: p3428, !f549

OBSERVATION FAN RUNS - FAN FAULT CODE

Next: !p1578, ?1579, ?1581

System Information

  • Total Tests: 557
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control