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:

BIASI ADVANCE 25/30/35 C

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

BIASI ADVANCE 25/30/35 C

Next: &706, !f2

OBSERVATION BOILER INITIALISATION

BOILER IN CH AND DHW MODE, NO DEMANDS

Next: &244, ?146, ?148, ?212, ?1358, ?1360

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &246, !f245

OBSERVATION DHW FLOW RATE

Next: &257, f1923

OBSERVATION DHW DEMAND RECOGNISED

FLOW RATE SET TO 3 LITRES A MIN
BOILER DHW THERMOSTAT SET TO MAX

Next: &267, f258

OBSERVATION PUMP RUNNING

Next: &284, f268

OBSERVATION FAN RUNS

BOILER DHW THERMOSTAT SET TO MAX

Next: &292, f285

OBSERVATION BURNER IGNITES AND ESTABLISHES

BOILER DHW THERMOSTAT SET TO MAX

Next: &606, ?293, ?295, ?297, ?299

PERFORMANCE ANALYSIS

BOILER IN SERVICE MODE

Next: &422, f2006

OPERATION DHW

BOILER DHW SETTING TO MAX
REFIT DIVERTER VALVE MOTOR

Next: &552, ?423, ?425, ?427, ?429, ?431

OBSERVATION CH DEMAND RECOGNISED

USER CONTROL SET TO

Next: &629, f1839

OBSERVATION PREHEAT OPERATION

BOILER DHW THERMOSTAT SET TO MAX

Next: &602, !f601

OBSERVATION FAN AND PUMP OVERRUN

Next: &604, !f603

OBSERVATION ANTI CYCLE DELAY

BOILER CH THERMOSTAT SET TO 50°C

Next: &nff, !f605

PRESSURE GAS INLET PRIMARY TEST

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
REMOVE THE DIVERTER VALVE MOTOR

Next: &386, !f607

OPERATION CH

BOILER CH THERMOSTAT SET TO MAX

Next: &600, ?630, ?644, ?678, ?1147

IMPORTANT NOTES FOR THIS APPLIANCE PLEASE READ THOROUGHLY

THIS APPLIANCE INCOR

Next: &143, !f707

HEADER FOR FUSE FURTHER INVESTIGATION

INTENTIONALLY BLANK HEADER FOR FUSE INVESTIGATION

Next: &nff, f722

HEADER FOR E04

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f746

HEADER FOR E05

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f872

HEADER FOR E06 AND E12

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f757

HEADER FOR E07

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f766

HEADER FOR E08

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f799

HEADER FOR E09

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f771

HEADER FOR E10

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f1098

HEADER FOR OVERHEAT INVESTIGATION E02, E13, E14, L01

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f1160

HEADER FOR E69

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, !f778

HEADER FOR E19

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, !f787

HEADER FOR E99

INTENTIONALLY BLANK FAULT CODE HEADER

Next: &nff, f796

COMBUSTION MODE PAGE

Next: &nff, !f1121

SERVICE MODE INFORMATION PAGE

THE 🔧 SYMBOL

Next: &nff, !f1543

HEADER FOR E25 AND E11

BLANK

Next: &nff, f1948

E10 FAULT CODE

FLUE TEMPERATURE PROBE NTC - SAFETY THERMAL FUSE (THERMISTOR COMPONENT)

Next: End

E10 FAULT CODE

MANIFOLD - AIR

Next: End

E10 FAULT CODE

AIR BOX ASSEMBLY

Next: End

E10 FAULT CODE

CONDENSATE TRAP OR PIPEWORK

Next: End

DIVERTER VALVE SECTION BLOWING FUSES

CABLE - 230V ELECTRICITY SUPPLY

Next: End

BLOWING FUSES FAN SECTION

CABLE - 230V ELECTRICITY SUPPLY

Next: End

BLANK FOR COMBUSTION MODE PAGE

Z DIRECTION CHOICE OR CONTINUE

Next: End

IGNITES BUT DOES NOT ESTABLISH

CONDENSATE TRAP OR PIPEWORK

Next: End

OVERPRESSURING ON CH

VESSEL - EXPANSION

Next: End

OPEN CIRCUIT

THERMOSTAT 105 DEG C OVERHEAT

Next: End

NOT SUPPLYING POWER TO DIVERTER FOR DHW FOR OVERHEAT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

POWER TO DIVTERTER VALVE DHW FOR OVERHEAT

CABLE - 230V ELECTRICITY SUPPLY

Next: End

OVERHEAT INVESTIGATION

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

PUMP NOT RUNNING

CABLE - 230V ELECTRICITY SUPPLY

Next: End

BOILER TO TEMP RADS COLD

TAP 3/4 IN - CH

Next: End

BLANK FOR FAULT CODES 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

WEAK NOISY CH

PUMP

Next: End

BLANK FOR SERVICE INDICATOR

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW TOO COOL

FLUE TEMPERATURE PROBE NTC - SAFETY THERMAL FUSE (THERMISTOR COMPONENT)

Next: End

WEAK CAUSING DHW TOO COOL

PUMP

Next: End

DHW HOT AND COLD

FLUE TEMPERATURE PROBE NTC - SAFETY THERMAL FUSE (THERMISTOR COMPONENT)

Next: End

WEAK CAUSING DHW HOT AND COLD

PUMP

Next: End

HOLDING FAN OFF

TEMPERATURE PROBE - OUTLET

Next: End

MAINS FUSE

FUSE MAINS

Next: End

PUMP NOT RUNNING OVERHEAT

CABLE - 230V ELECTRICITY SUPPLY

Next: End

WEAK CAUSING OVERHEAT

PUMP

Next: End

PUMP OVERRUN FOR OVERHEATING

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

OVERHEATING

KIT - BY-PASS

Next: End

NO POWER TO PUMP

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NO POWER TO PUMP OVERHEAT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E10 FAULT CODE

BURNER

Next: End

E10 FAULT CODE

FLUE

Next: End

FUSE F1 MAIN PCB

FUSE F1 MAIN PCB

Next: End

BAFFLING

CONDENSATE TRAP OR PIPEWORK

Next: End

BAFFLING

MANIFOLD - AIR

Next: End

IGNITES BUT BAFFLES

AIR BOX ASSEMBLY

Next: End

BAFFLING

BURNER

Next: End

BAFFLING

CONDENSING HEAT EXCHANGER

Next: End

NOT ESTABLISHING

AIR BOX ASSEMBLY

Next: End

NOT RECTIFYING

BURNER

Next: End

NOT ESTABLISHING

ELECTRODE DETECTION AND BURNER GAP

Next: End

TO FLOW TURBINE

SENSORS - CABLE

Next: End

NO POWER TO DISPLAY

WIRING - PCB - MAIN ELECTRONIC CONTROL TO - PCB (DISPLAY)

Next: End

E09 FAULT CODE

FLUE TEMPERATURE PROBE NTC - SAFETY THERMAL FUSE (FUSE PART)

Next: End

BLOWING FUSES - PUMP

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT TRANSMITTING CH DEMAND

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM DISPLAY

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT RECOGNISING CH DEMAND

CABLE - DUMMY JUMPER / CLOCK

Next: End

NOT TRANSMITTING CH DEMAND 2

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM DISPLAY 2

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT RECOGNISING CH DEMAND 2

CABLE - DUMMY JUMPER / CLOCK

Next: End

FROM INCOMING TERMINAL TO MAIN PCB

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT TRANSMITTING CH DEMAND 3

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM DISPLAY 3

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT RECOGNISING CH DEMAND 3

CABLE - DUMMY JUMPER / CLOCK

Next: End

NOT TRANSMITTING CH DEMAND 4

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM DISPLAY 4

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT RECOGNISING CH DEMAND 4

CABLE - DUMMY JUMPER / CLOCK

Next: End

NOT TRANSMITTING CH DEMAND 5

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM DISPLAY 5

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT RECOGNISING CH DEMAND 5

CABLE - DUMMY JUMPER / CLOCK

Next: End

TAP OPEN OR DHW DRAW OFF OPEN

TAP OPEN OR DHW DRAW OFF OPEN

Next: End

FIRING NO DEMAND

FLOW SWITCH - MAGNETIC (FLOW TURBINE)

Next: End

DEMAND WHEN SHOULDNT BE

SWITCH - FLOW - DHW

Next: End

FOR FROST PROTECTION

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

POSSIBLY FAULTY

FROST THERMOSTAT

Next: End

FIRING WITH NO CH DEMAND

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

DHW COOL RADS COOL

EXTERNAL MIXING

Next: End

NOT SENSING PRESSURE

SWITCH - PRESSURE - PRIMARY CIRCUIT

Next: End

E04 FAULT CODE

SENSORS - CABLE

Next: End

NOT FULLY OPEN

TAP 1/2 IN - DHW

Next: End

DHW FLOW RATE

WATER SUPPLY

Next: End

FAULT CODE 020

WATER INGRESS

Next: End

E25 AND E11 - INCORRECTLY READING FAULT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E25 AND E11 - SENDING VOLTAGE TO GAS VALVE AFTER DEMAND

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

BLOWING FUSES GAS VALVE SECTION

CABLE - 230V ELECTRICITY SUPPLY

Next: End

INCORRECT FAN PRESSURE

CONDENSATE TRAP OR PIPEWORK

Next: End

TO GAS VALVE

CABLE - 230V ELECTRICITY SUPPLY

Next: End

GAS VALVE NOT OPENING

COIL UNIT - GAS VALVE SIT

Next: End

NO DROP

FLUE

Next: End

INCORRECT FAN PRESSURE

FLUE

Next: End

PRESSURES CORRECT BUT NOT LIGHTING

ELECTRODE - IGNITION

Next: End

INCORRECT FAN PRESSURE

MANIFOLD - AIR

Next: End

NOT IGNITING

AIR BOX ASSEMBLY

Next: End

BLANK FOR CASE OFF

Z DIRECTION CHOICE OR CONTINUE

Next: End

PRESSURES CORRECT BUT NOT LIGHTING

BURNER

Next: End

INCORRECT FAN PRESSURE

CONDENSING HEAT EXCHANGER

Next: End

NOT IGNITING

ELECTRODE - IGNITION AND BURNER GAP

Next: End

PERFORMANCE TEST FAIL

MANIFOLD - AIR

Next: End

PERFORMANCE TEST FAIL

AIR BOX ASSEMBLY

Next: End

PERFORMANCE TEST FAIL

FLUE

Next: End

PERFORMANCE TEST FAIL

BURNER

Next: End

PERFORMANCE TEST FAIL

CONDENSING HEAT EXCHANGER

Next: End

FUSE F2 MAIN PCB

FUSE F2 MAIN PCB

Next: End

UNABLE TO ADJUST TO CORRECT SETTINGS

GAS VALVE

Next: End

IGNITES BUT BAFFLES OUT

GAS RESTRICTOR

Next: End

NO IGNITION - NO DROP

GAS RESTRICTOR

Next: End

NO IGNITION WITH DROP

GAS RESTRICTOR

Next: End

FAN SUPPLY E05 FAULT CODE

CABLE - 230V ELECTRICITY SUPPLY

Next: End

DC FAN SECTION E05 FAULT CODE

SENSORS - CABLE

Next: End

DC FAN SECTION RUNNING CONTINUALLY 3 E05 FAULT CODE

SENSORS - CABLE

Next: End

NO PERMANENT DC TO FAN E05 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

RUNNING CONTINUOUSLY E05 FAULT CODE

FAN

Next: End

E05 FAN RUNNING WITH DEMAND

SENSORS - CABLE

Next: End

E08

PCB - OUTDOOR PARAMETER

Next: End

E08

OUTDOOR SENSOR

Next: End

KEEPING BOILER TEMP TOO LOW - NO SENSOR

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

KEEPING BOILER TEMP TOO LOWE08

OUTDOOR SENSOR

Next: End

E05 RUNNING WITH DEMAND

FAN

Next: End

BAFFLING AT IGNITION

FLUE

Next: End

PERFORMANCE ANALYSIS

GAS RESTRICTOR

Next: End

BLANK FOR TYPE OF DIAGNOSTICS

Z DIRECTION CHOICE OR CONTINUE

Next: End

NO PERMANENT VOLTAGE TO FLOW TURBINE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

TO FLOW TURBINE NOT RECOGNISING DEMAND

SENSORS - CABLE

Next: End

NOT SPINNING FREELY

FLOW SWITCH - MAGNETIC (FLOW TURBINE)

Next: End

HOLDING FAN OFF

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

IGNITION ELECTRODE AND LEAD

ELECTRODE - IGNITION

Next: End

RECTIFICATION LEAD

SENSORS - CABLE

Next: End

NOT RECTIFYING

ELECTRODE DETECTION

Next: End

IGNITES BUT DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

IGNITES BUT BAFFLES OUT

GAS INLET PRESSURE

Next: End

NOT SUPPLYING POWER TO DIVERTER FOR DHW

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

POWER TO DIVTERTER VALVE DHW

CABLE - 230V ELECTRICITY SUPPLY

Next: End

DHW TOO HOT

TEMPERATURE PROBE - OUTLET

Next: End

DHW TOO COOL

TEMPERATURE PROBE - OUTLET

Next: End

DHW TOO COOL

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

WEAK CAUSING NOISY

PUMP

Next: End

DHW TOO COOL DHW HOT AND COLD

TEMPERATURE PROBE - OUTLET

Next: End

DHW HOT AND COLD

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

NOT PREHEATING PROPERLY

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

OVERRUNS NOT WORKING

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

ANTI CYCLE DELAY

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

UNSATISFACTORY AT MAXIMUM LOAD

GAS INLET PRESSURE

Next: End

NOT SENDING POWER TO DIVERTER ON CH

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

POWER TO DIVERTER VALVE CH

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT OPENING TO RADS

KIT - DIVERTER VALVE

Next: End

OPEN WHEN SHOULDNT BE CAUSING RADS NOT TO HEAT

Next: End

OPEN WHEN SHOLDNT BE CAUSING RADS NOT TO HEAT

KIT - BY-PASS

Next: End

KEEPING BOILER TEMP TOO LOW

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

BOILER NOISY ON CH

TAP 3/4 IN - CH

Next: End

NOISY BOILER ON CH

Next: End

NOISY BOILER ON CH

KIT - BY-PASS

Next: End

FOR SAFETY WARNING

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLOWING FUSES

COIL UNIT - GAS VALVE SIT

Next: End

E06 FAULT CODE

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

E07 FAULT CODE

TEMPERATURE PROBE - OUTLET

Next: End

E09 FAULT CODE

FLUE TEMPERATURE PROBE NTC - SAFETY THERMAL FUSE (THERMISTOR COMPONENT)

Next: End

E69 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E19 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

BLANK FOR BOILER CONFIGURATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

E10 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

FUSE BLOWN

MAIN ELECTRONIC CONTROL - IGNITION PCB - FUSE INVESTIGATION

Next: End

BLOWING FUSES

ACTUATOR DIVERTER VALVE

Next: End

BLOWING FUSES

FAN

Next: End

BLOCKED

PIPE - CONNECTION EXPANSION VESSEL

Next: End

NOT RESETTING FROM OVERHEAT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

OVERHEAT STAT SECTION

SENSORS - CABLE

Next: End

NOT MOVING TO DHW POSITION FOR OVERHEAT

ACTUATOR DIVERTER VALVE

Next: End

BLANK FOR FAULT CODES

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULTY WINDINGS

PUMP

Next: End

DHW TOO COOL

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

RESTRICTED OR BLOCKED LOW DHW TEMP

HEAT EXCHANGER DHW

Next: End

RESTRICTED CAUSING POOR DHW

CONDENSING HEAT EXCHANGER

Next: End

DHW TOO COOL DHW HOT AND COLD

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

RESTRICTED OR BLOCKED DHW HOT AND COLD

HEAT EXCHANGER DHW

Next: End

DHW HOT AND COLD

CONDENSING HEAT EXCHANGER

Next: End

NO MAINS SUPPLY

Next: End

E06 AND E12 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

BLANK FOR MAINS FUSE FURTHER INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

RESTRICTED OR BLOCKED LOW DHW TEMPOVERHEAT INVESTIGATION

HEAT EXCHANGER DHW

Next: End

RESTRICTED CAUSING POOR DHWOVERHEAT INVESTIGATION

CONDENSING HEAT EXCHANGER

Next: End

BLANK FOR OVERHEAT SECTION

Z DIRECTION CHOICE OR CONTINUE

Next: End

OUT OF CALIBRATION

THERMOSTAT 105 DEG C OVERHEAT

Next: End

NOT SHUTTING DOWN AT TEMP

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

BLANK FOR FUSE F1 MAIN PCB INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULTY WINDINGS OVERHEAT

PUMP

Next: End

E10 FAULT CODE

CONDENSING HEAT EXCHANGER

Next: End

ADJUSTED INCORRECTLY BAFFLING

GAS VALVE

Next: End

NOT RECOGNISING RECTIFICATION

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

MAKING DISPLAY BLANK

SWITCH - FLOW - DHW

Next: End

PCB DISPLAY

CONTROL PANEL ELECTRONIC PCB

Next: End

PCB MAIN

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E09 FAULT CODE

SENSORS - CABLE

Next: End

BLOWING FUSES

PUMP

Next: End

NOT SENDING VOLTAGE TO EXTERNAL CONTROLS

Next: End

NO POWER TO CH CIRCUIT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT FIRING FOR CH

Next: End

NOT RECOGNISING CH DEMAND

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT SENDING CH DEMAND TO MAIN PCB

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING TIMER DEMAND TO MAIN PCB

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING VOLTAGE TO EXTERNAL CONTROLS 2

Next: End

NO POWER TO CH CIRCUIT 2

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT FIRING FOR CH 2

Next: End

NOT RECOGNISING CH DEMAND 2

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT SENDING CH DEMAND TO MAIN PCB 2

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING TIMER DEMAND TO MAIN PCB 2

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING VOLTAGE TO EXTERNAL CONTROLS 3

Next: End

NO POWER TO CH CIRCUIT 3

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT FIRING FOR CH 3

Next: End

NOT RECOGNISING CH DEMAND 3

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT SENDING CH DEMAND TO MAIN PCB 3

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING TIMER DEMAND TO MAIN PCB 3

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING VOLTAGE TO EXTERNAL CONTROLS 4

Next: End

NO POWER TO CH CIRCUIT 4

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT FIRING FOR CH 4

Next: End

NOT RECOGNISING CH DEMAND 4

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT SENDING CH DEMAND TO MAIN PCB 4

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING TIMER DEMAND TO MAIN PCB 4

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING VOLTAGE TO EXTERNAL CONTROLS 5

Next: End

NO POWER TO CH CIRCUIT 5

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT FIRING FOR CH 5

Next: End

NOT RECOGNISING CH DEMAND 5

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT SENDING CH DEMAND TO MAIN PCB 5

CONTROL PANEL ELECTRONIC PCB

Next: End

NOT SENDING TIMER DEMAND TO MAIN PCB 5

CONTROL PANEL ELECTRONIC PCB

Next: End

FIRING WITH NO DEMAND

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

CORRECTLY ACTIVATED

FROST PROTECTION

Next: End

INCORRECTLY ACTIVATING FROST PROTECTION

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

FIRING NO FROST PROTECTION DEMAND

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

DEMAND WHEN SHOULD NOT BE

Next: End

E04 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

LOW FLOW RATE

HEAT EXCHANGER DHW

Next: End

RESTRICTING FLOW

LIMITER - FLOW 10 LITRES/MIN

Next: End

RESTRICTED OR BLOCKED

FLOW SWITCH - MAGNETIC (FILTER)

Next: End

RESTRICTED BLOCKED OR JAMMED

FLOW SWITCH - MAGNETIC (FLOW TURBINE)

Next: End

E25 AND E11 - STUCK IN FAULT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E25 AND E11

ELECTRODE DETECTION

Next: End

E25 AND E11 - READING FLAME AFTER CUTOFF

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E25 AND E11 - NOT SHUTTING

GAS VALVE

Next: End

SPARKS BUT DOES NOT IGNITE

GAS INLET PRESSURE

Next: End

NO POWER TO GAS VALVE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT LIGHTING WRONG MIX

GAS VALVE

Next: End

BLANK FOR FUSE F2 MAIN PCB INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAILING PERFORMANCE TEST

COMBUSTION ADJUSTMENT

Next: End

MECHANICALLY FAILED

GAS VALVE

Next: End

E05 NOT RUNNING

FAN

Next: End

NO AC POWER TO FAN E05 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT RESPONDING TO DEMAND E05 FAULT CODE

FAN

Next: End

NO DC DEMAND E05 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

FAN RUNNING CONTINUOUSLY 2 E05 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E05 FAN RUNNING WITH DEMAND

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E04

PRESSURE GAUGE

Next: End

E04

SYSTEM PRESSURE

Next: End

NOISH CH

SYSTEM PRESSURE

Next: End

NOISY CH

PRESSURE GAUGE

Next: End

NOISY KETTLING ON DHW

SYSTEM PRESSURE

Next: End

NOISY DHW

PRESSURE GAUGE

Next: End

OVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

OVERHEAT

PRESSURE GAUGE

Next: End

E08 - NO SENSOR

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E08 - WITH SENSOR

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E08

SENSORS - CABLE

Next: End

KEEPING BOILER TEMP TOO LOW - WITH SENSOR

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

HOLDING FAN OFF

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E05 - NEUTRAL FAULT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT RECOGNISING DHW DEMAND

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

NOT RECOGNISING DEMAND

SWITCH - FLOW - DHW

Next: End

NOT SPARKING

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

PASSING TO RADS ON HW

KIT - DIVERTER VALVE

Next: End

NOT MOVING TO DHW POSITION

ACTUATOR DIVERTER VALVE

Next: End

DHW TOO HOT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

BOILER NOISY

HEAT EXCHANGER DHW

Next: End

NOISY ON DHW

CONDENSING HEAT EXCHANGER

Next: End

NO GOING TO CH POSITION

ACTUATOR DIVERTER VALVE

Next: End

BOILER TO TEMP AND RADS COLD

Next: End

ALLOWING BOILER TO GET TOO HOT

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

RESTRICTED BLOCKED CAUSING CH NOISE

CONDENSING HEAT EXCHANGER

Next: End

NOISE ON CH

Next: End

E06 FAULT CODE

SENSORS - CABLE

Next: End

E07 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

E07 FAULT CODE

SENSORS - CABLE

Next: End

E09 FAULT CODE

MAIN ELECTRONIC CONTROL - IGNITION PCB

Next: End

BLANK FOR CONFIGURATION 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

SYSTEM PRESSURE RISES EXCESSIVELY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1149

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p1858

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p1375

DISPLAY ILLUMINATED WITH NO FAULT CODE SHOWING BUT FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p2077

DISPLAY DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p156

DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: !p1553

BOILER DOES NOT RESPOND TO CENTRAL HEATING DEMAND

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: p1761

DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: !p1577

BOILER DOES NOT RESPOND TO CENTRAL HEATING DEMAND

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: p1799

DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: !p1626

BOILER DOES NOT RESPOND TO CENTRAL HEATING DEMAND

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: p1818

BOILER OVERHEATS BEFORE 90 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMP?

Next: !p1644

BOILER CONTINUES TO HEAT PAST 90 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMP?

Next: !p1646

VOLTAGE IS NOT PRESENT ON PIN 5 (BUT PRESENT ON PIN 9)

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: p1775

VOLTAGE IS NOT PRESENT ON PIN 9

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: !p1777

VOLTAGE IS NOT PRESENT ON PIN 5 (BUT PRESENT ON PIN 9)

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: p1794

VOLTAGE IS NOT PRESENT ON PIN 9

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: !p1796

VOLTAGE IS NOT PRESENT ON PIN 5 (BUT PRESENT ON PIN 9)

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: p1813

VOLTAGE IS NOT PRESENT ON PIN 9

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: !p1815

VOLTAGE IS NOT PRESENT ON PIN 5 (BUT PRESENT ON PIN 9)

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: p1832

VOLTAGE IS NOT PRESENT ON PIN 9

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: !p1834

VOLTAGE IS NOT PRESENT ON PIN 5 (BUT PRESENT ON PIN 9)

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: p1853

VOLTAGE IS NOT PRESENT ON PIN 9

CHARACTERISTIC TEST FROM VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

Next: !p1855

AF SHOWING ON DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION WHAT IS SHOWING ON DISPLAY

Next: p1861

bP SHOWING ON DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION WHAT IS SHOWING ON DISPLAY

Next: p1863

DHW DEMAND SHOWING ON DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION WHAT IS SHOWING ON DISPLAY

Next: p1865

FLOW LIMITER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION TURBINE, FILTER AND FLOW LIMITER

Next: !p1941

FILTER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION TURBINE, FILTER AND FLOW LIMITER

Next: !p1943

TURBINE RESTRICTED, BLOCKED OR JAMMED

CHARACTERISTIC TEST FROM INSPECTION TURBINE, FILTER AND FLOW LIMITER

Next: !p1945

PUMP AND FAN RUN BUT SPARKING DOES NOT OCCUR THEN FAULT REAPPEARS

CHARACTERISTIC TEST FROM OBSERVATION BOILER RESET - FALSE FLAME

Next: p1951

FAULT CODE REAPPEARS WITHOUT PUMP OR FAN RUNNING

CHARACTERISTIC TEST FROM OBSERVATION BOILER RESET - FALSE FLAME

Next: !p1953

GAS INLET PRESSURE UNSATISFACTORY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p1981

GAS INLET PRESSURE DOES NOT DIP DURING SPARKING

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p1983

PRESSURE LOW OR AIR IN SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2106

PRESSURE OK BUT DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2105

PRESSURE LOW OR AIR IN SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2109

PRESSURE OK BUT DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2111

PRESSURE LOW OR AIR IN SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2114

PRESSURE OK BUT DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2118

FAN RUNS CONTINUOUSLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p2088

PRESSURE LOW OR AIR IN SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2121

PRESSURE OK BUT DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE AND AIR

Next: !p2123

SPARKING DOES NOT OCCUR

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p294

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1975

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1136

BURNER IGNITES BUT BAFFLES OUT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p344

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p424

DHW TOO COOL RADS REMAIN COOL WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1880

DHW TOO COOL AND RADS BEGIN TO HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p428

BOILER NOISY (KETTLING)

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p501

DHW RUNS HOT AND COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p522

BOILER STILL NOISY

CHARACTERISTIC TEST FROM OBSERVATION OPERATION CH (NOISY)

Next: !p505

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION OPERATION CH (NOISY)

Next: p1780

BOILER UP TO TEMP RADS COLD

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1282

BOILER AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p645

BOILER NOISY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p679

DIFFERENTIAL INCORRECT OR LOCAL NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER FOR CH NOISY

Next: !p689

DIFFERENTIAL OK SYSTEM NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER FOR CH NOISY

Next: !p691

11/09/2019 09:39:48 1907_3_50_1 07/10/2019 10:56:11

12/09/2019 09:17:24

Next: End

RESISTANCE THERMISTOR FLUE

DISCONNECT PLUG FOR THERMAL FUSE / FLUE THERMISTOR

Next: p1099, !f1100

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p1103, !f1108

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR CN4 FROM THE MAIN PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p1116, !f1117

OBSERVATION RESET APPLIANCE - OVERHEAT

ALLOW APPLIANCE TO COOL

Next: p1214, f1162

RESISTANCE OVERHEAT THERMOSTAT AND HARNESS

REMOVE CONNECTOR CN6 FROM THE MAIN PCB

Next: !p1163, f1164

RESISTANCE OVERHEAT THERMOSTAT

REMOVE THE CONNECTORS (BLACK WIRES) FROM THE OVERHEAT THERMOSTAT

Next: !p1165, !f1166

VOLTAGE TO DIVERTER VALVE (DHW)

{GAINPCBACS}

Next: p1216, !f1217

DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p1551, ?1552, ?1554

RESISTANCE FUSE MAINS

REMOVE THE MAINS FUSE FROM ITS HOLDER

Next: !p158, f159

DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p1575, ?1576, ?1578

FURTHER INVESTIGATION FUSE MAINS

Next: !p160, !f161

VOLTAGE PUMP AT PCB

Next: p1606, !f1653

DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p1624, ?1625, ?1627

FURTHER INVESTIGATION FUSE F1 MAIN PCB

Next: !p165, !f166

RESISTANCE HARNESS FLOW TURBINE

REMOVE CONNECTOR CN12 FROM THE MAIN PCB
REMOVE THE CONNECTOR FROM THE FLOW TURBINE ASSEMBLY

Next: !p1727, !f1728

RESISTANCE HARNESS FLAT DISPLAY PCB

DISCONNECT CONNECTOR CN8 FROM THE MAIN PCB
DISCONNECT CONNECTOR CN2 FROM THE DISPLAY PCB

Next: !p1731, !f1732

VOLTAGE EXTERNAL CONTROLS SEND AT DISPLAY PCB

Next: p1764, f1765

VOLTAGE MAIN PCB TO DISPLAY PCB (MAINS)

Next: !p1766, f1767

RESISTANCE HARNESS MAIN PCB TO DISPLAY PCB (MAINS)

REMOVE CONNECTOR CN15 FROM THE MAIN PCB
REMOVE CONNECTOR CN4 FROM THE DISPLAY PCB

Next: !p1768, !f1769

VOLTAGE EXTERNAL CONTROLS SEND AT DISPLAY PCB

Next: p1783, f1784

VOLTAGE MAIN PCB TO DISPLAY PCB (MAINS)

Next: !p1785, f1786

RESISTANCE HARNESS MAIN PCB TO DISPLAY PCB (MAINS)

REMOVE CONNECTOR CN15 FROM THE MAIN PCB
REMOVE CONNECTOR CN4 FROM THE DISPLAY PCB

Next: !p1787, !f1788

VOLTAGE EXTERNAL CONTROLS SEND AT DISPLAY PCB

Next: p1802, f1803

VOLTAGE MAIN PCB TO DISPLAY PCB (MAINS)

Next: !p1804, f1805

RESISTANCE HARNESS MAIN PCB TO DISPLAY PCB (MAINS)

REMOVE CONNECTOR CN15 FROM THE MAIN PCB
REMOVE CONNECTOR CN4 FROM THE DISPLAY PCB

Next: !p1806, !f1807

VOLTAGE EXTERNAL CONTROLS SEND AT DISPLAY PCB

Next: p1821, f1822

VOLTAGE MAIN PCB TO DISPLAY PCB (MAINS)

Next: !p1823, f1824

RESISTANCE HARNESS MAIN PCB TO DISPLAY PCB (MAINS)

REMOVE CONNECTOR CN15 FROM THE MAIN PCB
REMOVE CONNECTOR CN4 FROM THE DISPLAY PCB

Next: !p1825, !f1826

VOLTAGE EXTERNAL CONTROLS RECEIVE AT DISPLAY PCB

GAIN ACCESS TO DISPLAY PCB CONNECTIONS

Next: p1840, f1841

VOLTAGE EXTERNAL CONTROLS SEND AT DISPLAY PCB

Next: p1842, f1843

VOLTAGE MAIN PCB TO DISPLAY PCB (MAINS)

Next: !p1844, f1845

RESISTANCE HARNESS MAIN PCB TO DISPLAY PCB (MAINS)

REMOVE CONNECTOR CN15 FROM THE MAIN PCB
REMOVE CONNECTOR CN4 FROM THE DISPLAY PCB

Next: !p1846, !f1847

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: !p1874, !f1875

OBSERVATION WATER SUPPLY

Next: p1935, !f1946

OBSERVATION BOILER RESET - FALSE FLAME

ALLOW APPLIANCE TO COOL

Next: p1949, ?1950, ?1952

VOLTAGE GAS VALVE AFTER DEMAND

Next: !p1962, !f1963

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE THE GAS VALVE CONNECTOR

Next: !p1986, !f1987

FURTHER INVESTIGATION FUSE F2 MAIN PCB

Next: !p201, !f202

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p2007, !f2008

VOLTAGE AC FAN AT FAN

NO DEMANDS

Next: !p2080, f2081

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE THE AC FAN CONNECTOR (3 WIRE) FROM THE FAN

Next: !p2082, !f2083

RESISTANCE HARNESS FAN DC

REMOVE CONNECTOR CN5 FROM THE MAIN PCB
REMOVE THE FAN DC CONNECTOR (4 WIRE) FROM THE FAN

Next: !p2086, !f2087

INSPECTION PARAMETER 15 (NO OUTDOOR SENSOR)

Next: !p2126, !f2127

RESISTANCE OUTDOOR SENSOR

GAIN ACCESS TO MAIN

Next: !p2130, !f2131

VOLTAGE DC FAN NEUTRAL

Next: !p2154, !f2153

VOLTAGE FLOW TURBINE DEMAND

{GAINPCBACS}
EASE CONNECTOR SLIGHTLY OFF THE PCB TO EXPOSE TEST POINT

Next: !p259, f260

VOLTAGE FLOW TURBINE PERMANENT

{GAINPCBACS}

Next: p262, !f261

VOLTAGE PUMP AT PCB

Next: p1269, !f1649

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p1596, !f289

VOLTAGE TO DIVERTER VALVE (DHW)

{GAINPCBACS}

Next: p435, !f436

VOLTAGE TO DIVERTER VALVE (CH)

{GAINPCBACS}

Next: p634, !f635

RESISTANCE PUMP AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN2 FROM THE INTERFACE PCB

Next: p725, f727

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p1760, !f1759

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE THE AC FAN CONNECTOR (3 WIRE) FROM THE FAN

Next: !p1118, !f1119

OBSERVATION SYSTEM PRESSURE AND AIR

NO DEMANDS

Next: p1917, ?2102, ?2104

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR CN6 FROM THE MAIN PCB

Next: !p1593, f760

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: !p764, !f765

RESISTANCE THERMISTOR DHW AND HARNESS

REMOVE CONNECTOR CN12 FROM THE MAIN PCB

Next: !p767, f768

RESISTANCE THERMISTOR DHW

REMOVE CONNECTOR FROM DHW THERMISTOR

Next: !p769, !f770

RESISTANCE THERMISTOR FLUE, THERMAL FUSE AND HARNESS

REMOVE CONNECTOR CN11 FROM THE MAIN PCB

Next: !p772, f773

RESISTANCE THERMISTOR FLUE

DISCONNECT PLUG FOR THERMAL FUSE / FLUE THERMISTOR

Next: p774, !f775

INFORMATION BOILER CONFIGURATION

Next: !p797, !f798

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p2124, f2125

RESISTANCE HARNESS FAN DC

REMOVE CONNECTOR CN5 FROM THE MAIN PCB
REMOVE THE FAN DC CONNECTOR (4 WIRE) FROM THE FAN

Next: p873, !f2096

TEMPERATURE EMISSIONS

Next: !p1101, f1102

INSPECTION AIR BOX ASSEMBLY

REMOVE THE AIR TUBE FROM THE AIR BOX'S AIR INTAKE

Next: p1104, !f1109

INSPECTION CONDENSATE PIPE

Next: p1654, !f1110

RESISTANCE DIVERTER VALVE MOTOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE MAIN PCB

Next: !p1114, f1115

INSPECTION CONDENSATE PIPE

Next: p308, !f1146

PRESSURE EXPANSION VESSEL

RELEASE PRIMARY HEATING CIRCUIT PRESSURE

Next: !p1150, !f1151

OBSERVATION DIVERTER VALVE MOTOR SPINDLE DHW

REMOVE THE DIVERTER VALVE HEAD FROM THE DIVERTER VALVE BODY

Next: p1220, f1215

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR CN4 FROM THE MAIN PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p1218, !f1219

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p1601, !f1222

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p1407, !f1270

INSPECTION VALVES FLOW AND RETURN

Next: p631, !f1296

FAULT CODES

Next: !p1376, !f1377

OBSERVATION SYSTEM PRESSURE AND AIR

NO DEMANDS

Next: p430, ?2113, ?2117

OBSERVATION SYSTEM PRESSURE AND AIR

NO DEMANDS

Next: p1459, ?2108, ?2110

LIMPET CHECK PUMP

Next: p680, !f1472

RESISTANCE THERMISTOR FLUE

DISCONNECT PLUG FOR THERMAL FUSE / FLUE THERMISTOR

Next: p1545, !f1546

LIMPET CHECK PUMP

Next: p1547, !f1548

DIFFERENTIAL TEMPERATURE DHW HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p1549, f1550

VOLTAGE MAINS POWER

{GAINPCBACS}

Next: p162, f157

RESISTANCE THERMISTOR FLUE

DISCONNECT PLUG FOR THERMAL FUSE / FLUE THERMISTOR

Next: p1569, !f1570

LIMPET CHECK PUMP

Next: p1571, !f1572

DIFFERENTIAL TEMPERATURE DHW HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p1573, f1574

RESISTANCE THERMISTOR DHW

REMOVE CONNECTOR FROM DHW THERMISTOR

Next: !p2150, !f1598

OBSERVATION SYSTEM PRESSURE AND AIR

NO DEMANDS

Next: p1602, ?2120, ?2122

OBSERVATION PUMP RUNNING

Next: p1604, f1605

LIMPET CHECK PUMP

Next: p1616, !f1617

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p1651, !f1613

OBSERVATION FAN AND PUMP OVERRUN

Next: p1618, !f1619

INSPECTION BYPASS INTERNAL

BOILER PRIMARY CIRCU

Next: p1620, !f1621

RESISTANCE FUSE F1 MAIN PCB

REMOVE FUSE F1 FROM THE MAIN PCB

Next: p163, f164

DIFFERENTIAL TEMPERATURE DHW FOR OVERHEAT INVESTIGATION

ATTACH TEMPERATURE P

Next: p1622, f1623

OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMP?

BOILER CH THERMOSTAT SET TO MAX
ATTACH TEMPERATURE PROBES AS PER THE RED ARROWS

Next: !p1641, ?1643, ?1645

RESISTANCE FUSE F2 MAIN PCB

REMOVE FUSE F2 FROM THE MAIN PCB

Next: p178, f200

INSPECTION BURNER

REMOVE THE FAN & BUR

Next: p1655, !f1656

INSPECTION FLUE ASSEMBLY

Next: !p1657, !f1658

INSPECTION CONDENSATE PIPE

Next: p1671, !f1672

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p1673, !f1674

INSPECTION AIR BOX ASSEMBLY

REMOVE THE AIR TUBE FROM THE AIR BOX'S AIR INTAKE

Next: p2155, !f1676

INSPECTION BURNER

REMOVE THE FAN & BUR

Next: p1677, !f1678

INSPECTION FLUEWAYS

REMOVE FAN AND BURNER ASSEMBLY

Next: !p1679, !f1680

INSPECTION AIR BOX ASSEMBLY

REMOVE THE AIR TUBE FROM THE AIR BOX'S AIR INTAKE

Next: p1693, !f1694

INSPECTION BURNER

REMOVE THE FAN & BUR

Next: p1695, !f1696

INSPECTION FLAME RECTIFICATION ELECTRODE AND BURNER GAP

REMOVE COMBUSTION DOOR ASSEMBLY COMPLETE WITH BURNER

Next: !p1697, !f1698

OBSERVATION FLOW TURBINE DISCONNECTION

REMOVE CONNECTOR CN12 FROM THE PCB AND MAKE SAFE
NO DEMANDS

Next: p1725, f1726

VOLTAGE DISPLAY PCB AT HARNESS

UNCLIP DISPLAY PCB AND WEDGE IN POSITION AS SHOWN
NO DEMANDS

Next: !p1729, f1730

VOLTAGE EXTERNAL CONTROLS RECEIVE AT DISPLAY PCB

GAIN ACCESS TO DISPLAY PCB CONNECTIONS

Next: p1762, f1763

VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

UNCLIP AND FLIP DISPLAY PCB OVER THEN SECURE IT IN PLACE WITH A SCREW AS SHOWN

Next: !p1772, ?1774, ?1776

RESISTANCE HARNESS DISPLAY PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN5 FROM THE DISPLAY PCB

Next: !p1770, !f1771

RESISTANCE HARNESS CLOCK / LINK

DISCONNECT CN1 FROM THE DISPLAY PCB

Next: !p1778, !f1779

RESISTANCE HARNESS MAINS INTO PCB

REMOVE CONNECTOR CN1 FROM THE MAIN PCB

Next: p1724, !f180

VOLTAGE EXTERNAL CONTROLS RECEIVE AT DISPLAY PCB

GAIN ACCESS TO DISPLAY PCB CONNECTIONS

Next: p1781, f1782

VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

UNCLIP AND FLIP DISPLAY PCB OVER THEN SECURE IT IN PLACE WITH A SCREW AS SHOWN

Next: !p1791, ?1793, ?1795

RESISTANCE HARNESS DISPLAY PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN5 FROM THE DISPLAY PCB

Next: !p1789, !f1790

RESISTANCE HARNESS CLOCK / LINK

DISCONNECT CN1 FROM THE DISPLAY PCB

Next: !p1797, !f1798

VOLTAGE EXTERNAL CONTROLS RECEIVE AT DISPLAY PCB

GAIN ACCESS TO DISPLAY PCB CONNECTIONS

Next: p1800, f1801

VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

UNCLIP AND FLIP DISPLAY PCB OVER THEN SECURE IT IN PLACE WITH A SCREW AS SHOWN

Next: !p1810, ?1812, ?1814

RESISTANCE HARNESS DISPLAY PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN5 FROM THE DISPLAY PCB

Next: !p1808, !f1809

RESISTANCE HARNESS CLOCK / LINK

DISCONNECT CN1 FROM THE DISPLAY PCB

Next: !p1816, !f1817

VOLTAGE EXTERNAL CONTROLS RECEIVE AT DISPLAY PCB

GAIN ACCESS TO DISPLAY PCB CONNECTIONS

Next: p1819, f1820

VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

UNCLIP AND FLIP DISPLAY PCB OVER THEN SECURE IT IN PLACE WITH A SCREW AS SHOWN

Next: !p1829, ?1831, ?1833

RESISTANCE HARNESS DISPLAY PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN5 FROM THE DISPLAY PCB

Next: !p1827, !f1828

RESISTANCE HARNESS CLOCK / LINK

DISCONNECT CN1 FROM THE DISPLAY PCB

Next: !p1835, !f1836

VOLTAGE DISPLAY PCB TO MAIN PCB (CH DEMAND)

UNCLIP AND FLIP DISPLAY PCB OVER THEN SECURE IT IN PLACE WITH A SCREW AS SHOWN

Next: !p1850, ?1852, ?1854

RESISTANCE HARNESS DISPLAY PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN5 FROM THE DISPLAY PCB

Next: !p1848, !f1849

RESISTANCE HARNESS CLOCK / LINK

DISCONNECT CN1 FROM THE DISPLAY PCB

Next: !p1856, !f1857

OBSERVATION WHAT IS SHOWING ON DISPLAY

Next: p1859, ?1860, ?1862, ?1864

VOLTAGE EXTERNAL CONTROLS AT TERMINAL STRIP FIRING WITH NO DEMAND

GAIN ACCESS TO THE APPLIANCE TERMINAL STRIP
NO DEMANDS

Next: !p1878, !f1879

VOLTAGE FROST THERMOSTAT

GAIN ACCESS TO THE APPLIANCE TERMINAL STRIP
NO DEMANDS

Next: !p1876, !f1877

TEMPERATURE APPLIANCE

Next: !p1872, f1873

OBSERVATION ISOLATE DHW

TURN DHW ISOLATION OFF

Next: p1866, !f1867

OBSERVATION REMOVE FLOW SENSOR ASSEMBLY

REMOVE THE FLOW SENS

Next: p1868, !f1869

OBSERVATION REMOVE FLOW SENSOR CONNECTOR

NO DEMANDS
REMOVE THE CONNECTOR FROM THE FLOW SENSOR
ASSEMBLY AND MAKE SAFE

Next: !p1870, !f1871

OBSERVATION EXTERNAL MIXING

Next: p426, !f1915

RESISTANCE PRESSURE SWITCH

DISCONNECT LEADS FROM WATER PRESSURE SWITCH

Next: p1918, !f1919

RESISTANCE HARNESS PRESSURE SWITCH

REMOVE CONNECTOR CN10 FROM THE PCB
REMOVE WIRES FROM PRESSURE SWITCH

Next: !p1920, !f1921

INSPECTION ISOLATION VALVE DHW

Next: p1936, !f1937

INSPECTION TURBINE, FILTER AND FLOW LIMITER

ISOLATE THE COLD MAI

Next: !p1938, ?1940, ?1942, ?1944

OBSERVATION FLAME SHUT OFF DELAY

ENSURE NO CH DEMAND

Next: !p1960, f1961

INSPECTION PCB AND CONNECTIONS

{GAINPCBACS}

Next: p1954, !f1955

OBSERVATION DISCONNECT RECTIFICATION LEAD

DISCONNECT RECTIFICATION LEAD FROM INLINE CONNECTOR AND MAKE SAFE

Next: !p1956, !f1957

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE THE GAS VALVE CONNECTOR

Next: p726, !f1974

INSPECTION CONDENSATE PIPE

Next: p1976, !f1977

PRESSURE GAS INLET AND DROP

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1978, ?1980, ?1982

INSPECTION FLUE ASSEMBLY

Next: p1992, !f1993

VOLTAGE GAS VALVE

Next: p1984, f1985

RESISTANCE GAS VALVE SOLENOID

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: p1988, !f1989

INSPECTION FLUE ASSEMBLY

Next: p2030, !f1991

INSPECTION IGNITION ELECTRODE AND LEAD

REMOVE THE IGNITION ELECTRODE AND LEAD ASSEMBLY

Next: p1994, !f1995

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p1996, !f1997

INSPECTION AIR BOX ASSEMBLY

REMOVE THE AIR TUBE FROM THE AIR BOX'S AIR INTAKE

Next: p2033, !f1999

INSPECTION BURNER

REMOVE THE FAN & BUR

Next: p2000, !f2001

INSPECTION FLUEWAYS

REMOVE FAN AND BURNER ASSEMBLY

Next: p2002, !f2003

INSPECTION IGNITION ELECTRODE AND BURNER GAP

REMOVE FAN AND BURNER ASSEMBLY

Next: !p2004, !f2005

INSPECTION AIR BOX ASSEMBLY

REMOVE THE AIR TUBE FROM THE AIR BOX'S AIR INTAKE

Next: p2009, !f2010

INSPECTION FLUE ASSEMBLY

Next: p2168, !f2012

INSPECTION BURNER

REMOVE THE FAN & BUR

Next: p2013, !f2014

INSPECTION FLUEWAYS

REMOVE FAN AND BURNER ASSEMBLY

Next: p2018, !f2016

OBSERVATION CAN COMBUSTION BE ADJUSTED

BOILER IN SERVICE MODE

Next: !p2019, !f2020

INSPECTION GAS RESTRICTOR

UNDO NUT AT TOP OF GAS VALVE

Next: p1675, !f2029

INSPECTION GAS RESTRICTOR

UNDO NUT AT TOP OF GAS VALVE

Next: !p2031, !f2032

INSPECTION GAS RESTRICTOR

UNDO NUT AT TOP OF GAS VALVE

Next: p1998, !f2041

OBSERVATION DISCONNECT FAN (DC)

UNPLUG 4 WIRE CONNECTOR FROM FAN

Next: p2078, f2079

VOLTAGE DC DEMAND AT FAN

RECONNECT 4 WIRE CONNECTOR AT FAN IF YOU HAVE NOT ALREADY DONE SO
NO DEMANDS

Next: !p2084, f2085

RESISTANCE HARNESS FAN DC

REMOVE CONNECTOR CN5 FROM THE MAIN PCB
REMOVE THE FAN DC CONNECTOR (4 WIRE) FROM THE FAN

Next: p2089, !f2090

VOLTAGE DC FAN PERMANENT AT FAN

NO DEMANDS

Next: p2091, !f2092

VOLTAGE DC FAN DEMAND AT FAN RUNNING CONTINUOUSLY

NO DEMANDS

Next: !p2093, !f2094

RESISTANCE OUTDOOR SENSOR AND HARNESS

REMOVE CONNECTOR CN12 FROM THE MAIN PCB

Next: !p2128, f2129

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p2143, !f2144

RESISTANCE OUTDOOR SENSOR AND HARNESS

REMOVE CONNECTOR CN12 FROM THE MAIN PCB

Next: !p2147, !f2148

INSPECTION FLUE ASSEMBLY

Next: p2021, !f2165

INSPECTION GAS RESTRICTOR

UNDO NUT AT TOP OF GAS VALVE

Next: p2011, !f2176

RESISTANCE HARNESS FLOW TURBINE

REMOVE CONNECTOR CN12 FROM THE MAIN PCB
REMOVE THE CONNECTOR FROM THE FLOW TURBINE ASSEMBLY

Next: p263, !f264

INSPECTION FLOW TURBINE

ISOLATE COLD MAINS TO APPLIANCE AND DRAIN AND DISCHARGE DHW CIRCUIT

Next: !p265, !f266

INSPECTION IGNITION ELECTRODE AND LEAD

REMOVE THE IGNITION ELECTRODE AND LEAD ASSEMBLY

Next: !p301, !f302

INSPECTION RECTIFICATION ELECTRODE AND LEAD

REMOVE THE RECTIFICA

Next: p303, !f307

RESISTANCE HARNESS RECTIFICATION

REMOVE CONNECTOR T2 FROM THE MAIN PCB

Next: p1692, !f306

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p298, !f314

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1670, !f358

RESISTANCE THERMISTOR DHW

REMOVE CONNECTOR FROM DHW THERMISTOR

Next: !p447, !f443

RESISTANCE THERMISTOR DHW

REMOVE CONNECTOR FROM DHW THERMISTOR

Next: p448, !f473

OBSERVATION DIVERTER VALVE MOTOR SPINDLE DHW

REMOVE THE DIVERTER VALVE HEAD FROM THE DIVERTER VALVE BODY

Next: !p433, f434

OBSERVATION OPERATION CH (NOISY)

BOILER CH THERMOSTAT SET TO MAX
INTERNAL TIMER TURNED ON / SET TO ON PERIOD (IF FITTED)

Next: !p503, ?504, ?506

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR CN4 FROM THE MAIN PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p437, !f438

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p1544, !f474

LIMPET CHECK PUMP

Next: p1427, !f521

RESISTANCE THERMISTOR DHW

REMOVE CONNECTOR FROM DHW THERMISTOR

Next: p523, !f524

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p1568, !f526

OBSERVATION DIVERTER VALVE MOTOR SPINDLE CH

REMOVE THE DIVERTER VALVE HEAD FROM THE DIVERTER VALVE BODY

Next: p632, f633

INSPECTION DIVERTER VALVE BODY

REMOVE DIVERTER VALVE MOTOR FROM THE DIVERTER VALVE BODY

Next: p638, !f639

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR CN4 FROM THE MAIN PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p636, !f637

INSPECTION EXTERNAL BYPASS

Next: p640, !f641

INSPECTION BYPASS INTERNAL

BOILER PRIMARY CIRCU

Next: !p642, !f643

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p2142, !f647

INSPECTION VALVES FLOW AND RETURN

Next: p1447, !f681

INSPECTION EXTERNAL BYPASS

Next: p682, !f683

INSPECTION BYPASS INTERNAL

BOILER PRIMARY CIRCU

Next: p684, !f685

DIFFERENTIAL PRIMARY HEAT EXCHANGER FOR CH NOISY

BOILER CH THERMOSTAT

Next: !p686, ?688, ?690

RESISTANCE GAS VALVE FOR FUSE INVESTIGATION

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: p1964, !f728

RESISTANCE FAN AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN2 FROM THE MAIN PCB

Next: p1113, f729

RESISTANCE THERMAL FUSE

DISCONNECT PLUG FOR THERMAL FUSE / FLUE THERMISTOR

Next: !p1757, !f1758

VOLTAGE DC FAN HALL SENSOR AT FAN

Next: !p2100, f2151

System Information

  • Total Tests: 570
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control