XSol Diagnostic System

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:

4758326 BIASI ACTIV A PLUS 30C

WARNING - IMPORTA

Next: &1, *

NO FAULT FOUND

Next: nff

4758326 BIASI ACTIV A PLUS 30C

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, f247

OBSERVATION DHW DEMAND RECOGNISED

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, f609

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 CH AND DHW
BOILER CH THERMOSTAT SET TO MAX

Next: &629, f693

OBSERVATION PREHEAT OPERATION

BOILER DHW THERMOSTA

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

OPERATIONAL SEQUENCE

Next: &nff, !f628

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

TO ACTIVATE THE APPLIANCES MAXIMUM AND MINIMUM OUTPUT MODES FOLLOW THE INSTRUCTIONS BELOW:

Next: &nff, !f1121

SERVICE MODE INFORMATION PAGE

THIS SYMBOL FLASHING

Next: &nff, !f1543

E10 FAULT CODE

PROBE FLUE TEMPERATURE NTC

Next: End

E10 FAULT CODE

AIR INTAKE TUBE

Next: End

E10 FAULT CODE

AIR BOX ASSEMBLY

Next: End

E10 FAULT CODE

CONDENSATE TRAP OR PIPEWORK

Next: End

E10 FAULT CODE

TUBE VENTURI DEVICE

Next: End

E10 FAULT CODE

BURNER

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

E04 FAULT CODE

CABLE SENSORS

Next: End

NO POWER TO LOW PRESSURE SWITCH

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

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

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

POWER TO DIVTERTER VALVE DHW FOR OVERHEAT

CABLE - 230V ELECTRICITY SUPPLY

Next: End

OVERHEAT INVESTIGATION

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

OVERHEAT INVESTIGATION

PROBE SPRING MOUNTING TEMPERATURE - RETURN

Next: End

OVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

FROM MAIN PCB TO INTERFACE PCB OVERHEAT

CABLE - 230V ELECTRICITY SUPPLY

Next: End

WEAK CAUSING OVERHEAT

PUMP

Next: End

INTERFACE PCB TO TERMINAL STRIPOVERHEAT INVESTIGATION

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM INTERFACE PCBOVERHEAT INVESTIGATION

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT TRANSMITTING CH DEMANDOVERHEAT INVESTIGATION

CABLE - FLAT

Next: End

PUMP NOT RUNNING

CABLE PUMP

Next: End

PUMP NOT RUNNING OVERHEAT

CABLE PUMP

Next: End

INCORRECT FAN PRESSURE

HEAT EXCHANGER - CONDENSING

Next: End

E10 FAULT CODE

FLUE

Next: End

BOILER TO TEMP RADS COLD

TAP 3/4 INCH CH

Next: End

BAFFLING

AIR INTAKE TUBE

Next: End

IGNITES BUT BAFFLES

AIR BOX ASSEMBLY

Next: End

BAFFLING

BURNER

Next: End

BAFFLING

HEAT EXCHANGER - CONDENSING

Next: End

BAFFLING AT IGNITION

FLUE

Next: End

DC FAN SECTION RUNNING SLOW CONTINUOUSLY E05 FAULT CODE

CABLE SENSORS

Next: End

RUNNING SLOW CONTINUOSULY E05 FAULT CODE

FAN

Next: End

TO PRESSURE SWITCH

CABLE SENSORS

Next: End

TO FLOW TURBINE

CABLE SENSORS

Next: End

NO POWER TO DISPLAY

WIRING MAIN PCB TO CONTROL PCB

Next: End

DC FAN SECTION RUNNING CONTINUALLY 3

CABLE SENSORS

Next: End

NO PERMANENT DC TO FAN

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

RUNNING CONTINUOUSLY

FAN

Next: End

RUNNING SLOW CONTINUOSULY

FAN

Next: End

BLANK FOR FAULT CODES 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

FOR FROST PROTECTION

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

FOR FROST PROTECTION

PROBE SPRING MOUNTING TEMPERATURE - RETURN

Next: End

POSSIBLY FAULTY

FROST THERMOSTAT

Next: End

FIRING WITH NO DHW DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

DEMAND WHEN SHOULDNT BE

SWITCH - FLOW - DHW

Next: End

PUMP NOT RUNNING

CAPACITOR - PUMP

Next: End

NOT RUNNING OVERHEAT

CAPACITOR - PUMP

Next: End

NOT IGNITING

TUBE VENTURI DEVICE

Next: End

NOT IGNITING

AIR BOX ASSEMBLY

Next: End

NOT IGNITING

ELECTRODE IGNITION AND BURNER GAP

Next: End

NOISY KETTLING ON DHW

SYSTEM PRESSURE

Next: End

NOISH CH

SYSTEM PRESSURE

Next: End

WEAK NOISY CH

PUMP

Next: End

PUMP OVERRUN FOR OVERHEATING

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

OVERHEATING

KIT - BYPASS

Next: End

NOT ESTABLISHING

TUBE VENTURI DEVICE

Next: End

NOT ESTABLISHING

AIR BOX ASSEMBLY

Next: End

NOT ESTABLISHING

ELECTRODE DETECTION AND BURNER GAP

Next: End

BLANK FOR SERVICE INDICATOR

Z DIRECTION CHOICE OR CONTINUE

Next: End

MAINS FUSE

FUSE MAINS

Next: End

FUSE F1 MAIN PCB

FUSE F1 MAIN PCB

Next: End

FROM INCOMING TERMINAL TO MAIN PCB

CABLE - 230V ELECTRICITY SUPPLY

Next: End

BLANK FOR CASE OFF

Z DIRECTION CHOICE OR CONTINUE

Next: End

FUSE F2 MAIN PCB

FUSE F2 MAIN PCB

Next: End

FAN SUPPLY

CABLE - 230V ELECTRICITY SUPPLY

Next: End

DC FAN SECTION

CABLE SENSORS

Next: End

BLANK FOR TYPE OF DIAGNOSTICS

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT FULLY OPEN

TAP 1/2 INCH DHW

Next: End

NO PERMANENT VOLTAGE TO FLOW TURBINE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

TO FLOW TURBINE NOT RECOGNISING DEMAND

CABLE SENSORS

Next: End

NOT SPINNING FREELY

FLOW TURBINE

Next: End

FROM MAIN PCB TO INTERFACE PCB

CABLE - 230V ELECTRICITY SUPPLY

Next: End

HOLDING FAN OFF

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

HOLDING FAN OFF

PROBE SPRING MOUNTING TEMPERATURE - RETURN

Next: End

HOLDING FAN OFF

TEMPERATURE PROBE - OUTLET

Next: End

IGNITION ELECTRODE AND LEAD

ELECTRODE IGNITION

Next: End

RECTIFICATION LEAD

CABLE SENSORS

Next: End

NOT RECTIFYING

ELECTRODE DETECTION

Next: End

IGNITES BUT DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

NOT RECTIFYING

BURNER

Next: End

BAFFLING

CONDENSATE TRAP OR PIPEWORK

Next: End

BAFFLING

TUBE VENTURI DEVICE

Next: End

IGNITES BUT BAFFLES OUT

GAS INLET PRESSURE

Next: End

SPARKS BUT DOES NOT IGNITE

GAS INLET PRESSURE

Next: End

INCORRECT FAN PRESSURE

BURNER

Next: End

INCORRECT FAN PRESSURE

TUBE VENTURI DEVICE

Next: End

INCORRECT FAN PRESSURE

CONDENSATE TRAP OR PIPEWORK

Next: End

INCORRECT FAN PRESSURE

FLUE

Next: End

GAS VALVE NOT OPENING

COIL UNIT - GAS VALVE SIT

Next: End

TO GAS VALVE

CABLE - 230V ELECTRICITY SUPPLY

Next: End

PRESSURES CORRECT BUT NOT LIGHTING

ELECTRODE IGNITION

Next: End

PRESSURES CORRECT BUT NOT LIGHTING

BURNER

Next: End

INCORRECT FAN PRESSURE

AIR INTAKE TUBE

Next: End

NOT SUPPLYING POWER TO DIVERTER FOR DHW

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

POWER TO DIVTERTER VALVE DHW

CABLE - 230V ELECTRICITY SUPPLY

Next: End

DHW TOO HOT

TEMPERATURE PROBE - OUTLET

Next: End

INTERFACE PCB TO TERMINAL STRIP

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM INTERFACE PCB

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT TRANSMITTING CH DEMAND

CABLE - FLAT

Next: End

DHW TOO COOL

TEMPERATURE PROBE - OUTLET

Next: End

DHW TOO COOL

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

DHW TOO COOL

PROBE SPRING MOUNTING TEMPERATURE - RETURN

Next: End

WEAK CAUSING DHW TOO COOL

PUMP

Next: End

DHW TOO COOL

PROBE FLUE TEMPERATURE NTC

Next: End

INTERFACE PCB TO TERMINAL STRIP 2

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM INTERFACE PCB 2

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT TRANSMITTING CH DEMAND 2

CABLE - FLAT

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

DHW HOT AND COLD

PROBE SPRING MOUNTING TEMPERATURE - RETURN

Next: End

DHW HOT AND COLD

PROBE FLUE TEMPERATURE NTC

Next: End

WEAK CAUSING DHW HOT AND COLD

PUMP

Next: End

INTERFACE PCB TO TERMINAL STRIP DHW HOT AND COLD

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM INTERFACE PCB 3

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT TRANSMITTING CH DEMAND 3

CABLE - FLAT

Next: End

NOT PREHEATING PROPERLY

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

OVERRUNS NOT WORKING

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

ANTI CYCLE DELAY

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

UNSATISFACTORY AT MAXIMUM LOAD

GAS INLET PRESSURE

Next: End

PERFORMANCE TEST FAIL

TUBE VENTURI DEVICE

Next: End

PERFORMANCE TEST FAIL

AIR INTAKE TUBE

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

HEAT EXCHANGER - CONDENSING

Next: End

BLANK FOR OPERATIONAL SEQUENCE

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT SENDING POWER TO DIVERTER ON CH

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

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 - BYPASS

Next: End

KEEPING BOILER TEMP TOO LOW

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

KEEPING BOILER TEMP TOO LOW

PROBE SPRING MOUNTING TEMPERATURE - RETURN

Next: End

BOILER NOISY ON CH

TAP 3/4 INCH CH

Next: End

NOISY BOILER ON CH

Next: End

NOISY BOILER ON CH

KIT - BYPASS

Next: End

INTERFACE PCB TO TERMINAL STRIP 2 4

CABLE - 230V ELECTRICITY SUPPLY

Next: End

POWER NOT GETTING TO TERMINAL STRIP FROM INTERFACE PCB 4

CABLE - 230V ELECTRICITY SUPPLY

Next: End

NOT TRANSMITTING CH DEMAND 4

CABLE - FLAT

Next: End

FOR SAFETY WARNING

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLOWING FUSES

PUMP

Next: End

BLOWING FUSES

COIL UNIT - GAS VALVE SIT

Next: End

E06 FAULT CODE

PROBE SPRING MOUNTING TEMPERATURE - RETURN

Next: End

E06 FAULT CODE

PROBE SPRING MOUNTING TEMPERATURE - FLOW

Next: End

E07 FAULT CODE

TEMPERATURE PROBE - OUTLET

Next: End

E09 FAULT CODE

PROBE FLUE TEMPERATURE NTC

Next: End

E09 FAULT CODE

CABLE SENSORS

Next: End

E69 FAULT CODE 2

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E69 FAULT CODE

PRESSURE SENSOR CONNECTOR

Next: End

E69 FAULT CODE

CABLE SENSORS

Next: End

E19 FAULT CODE

TEMPERATURE PROBE - INLET

Next: End

E19 FAULT CODE

PCB AUXILIARY

Next: End

E19 FAULT CODE

CABLE - FLAT

Next: End

BLANK FOR BOILER CONFIGURATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK EXTERNAL TEMP PROBE 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAN SUPPLY E05 FAULT CODE

CABLE - 230V ELECTRICITY SUPPLY

Next: End

DC FAN SECTION E05 FAULT CODE

CABLE SENSORS

Next: End

E05 FAN DOES NOT RUN WITH DEMAND

CABLE SENSORS

Next: End

E05 RUNNING WITH DEMAND

FAN

Next: End

E05 FAN RUNNING WITH DEMAND

CABLE SENSORS

Next: End

DC FAN SECTION RUNNING CONTINUALLY 3 E05 FAULT CODE

CABLE SENSORS

Next: End

NO PERMANENT DC TO FAN E05 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

RUNNING CONTINUOUSLY E05 FAULT CODE

FAN

Next: End

E10 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

FUSE BLOWN

PCB ELECTRONIC CONTROL - FUSE INVESTIGATION

Next: End

BLOWING FUSES

ACTUATOR DIVERTER VALVE

Next: End

BLOWING FUSES

FAN

Next: End

E04 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E05 FAULT CODE

SYSTEM PRESSURE NEEDED TOPPING UP

Next: End

NOT SENSING PRESSURE

SWITCH - PRESSURE - PRIMARY CIRCUIT

Next: End

BLOCKED

PIPE - EXPANSION VESSEL

Next: End

NOT RESETTING FROM OVERHEAT

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

OVERHEAT STAT SECTION

CABLE SENSORS

Next: End

NOT MOVING TO DHW POSITION FOR OVERHEAT

ACTUATOR DIVERTER VALVE

Next: End

PUMP OVERHEAT

PCB AUXILIARY

Next: End

NO POWER TO PUMP OVERHEAT

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

RESTRICTED OR BLOCKED LOW DHW TEMPOVERHEAT INVESTIGATION

HEAT EXCHANGER DHW

Next: End

RESTRICTED CAUSING POOR DHWOVERHEAT INVESTIGATION

HEAT EXCHANGER - CONDENSING

Next: End

NOT FIRING FOR CHOVERHEAT INVESTIGATION

Next: End

NO POWER TO EXTERNAL CONTROLSOVERHEAT INVESTIGATION

Next: End

NOT SENDING CH DEMAND TO MAIN PCBOVERHEAT INVESTIGATION

PCB AUXILIARY

Next: End

NOT RECOGNISING CH DEMANDOVERHEAT INVESTIGATION

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

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

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

INCORRECT FAN PRESSURE

FAN

Next: End

E10 FAULT CODE

HEAT EXCHANGER - CONDENSING

Next: End

ADJUSTED INCORRECTLY BAFFLING

GAS VALVE

Next: End

FAN RUNNING SLOW CONTINUOUSLY E05 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

MAKING DISPLAY BLANK

SWITCH - PRESSURE - PRIMARY CIRCUIT

Next: End

MAKING DISPLAY BLANK

SWITCH - FLOW - DHW

Next: End

PCB DISPLAY

PCB CONTROL PANEL

Next: End

PCB MAIN

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

FAN RUNNING CONTINUOUSLY 2

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

FAN RUNNING SLOW CONTINUOUSLY

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

BLANK FOR FAULT CODES

Z DIRECTION CHOICE OR CONTINUE

Next: End

CORRECTLY ACTIVATED

FROST PROTECTION

Next: End

INCORRECTLY ACTIVATING FROST PROTECTION

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

TAP OPEN OR DHW DRAW OFF OPEN

TAP OPEN OR DHW DRAW OFF OPEN

Next: End

FIRING WITH NO DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

DEMAND WHEN SHOULD NOT BE

Next: End

FAULTY WINDINGS

PUMP

Next: End

FAULTY WINDINGS OVERHEAT

PUMP

Next: End

NOT LIGHTING WRONG MIX

GAS VALVE

Next: End

NOT RECOGNISING RECTIFICATION

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

NO MAINS SUPPLY

Next: End

BLANK FOR MAINS FUSE FURTHER INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR FUSE F1 MAIN PCB INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR FUSE F2 MAIN PCB INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT RESPONDING TO DEMAND

FAN

Next: End

NO AC POWER TO FAN

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

NO DC DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

LOW FLOW RATE

HEAT EXCHANGER DHW

Next: End

RESTRICTING FLOW

LIMITER - FLOW 10 LITRES/MIN

Next: End

RESTRICTED OR BLOCKED

FILTER

Next: End

RESTRICTED BLOCKED OR JAMMED

FLOW TURBINE

Next: End

NOT RECOGNISING DHW DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

NOT RECOGNISING DEMAND

SWITCH - FLOW - DHW

Next: End

PUMP

PCB AUXILIARY

Next: End

NO POWER TO PUMP

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

NOT RUNNING FAN WITH DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

NOT SPARKING

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

MECHANICALLY FAILED

GAS VALVE

Next: End

NO POWER TO GAS VALVE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

FAN PRESSURE MUCH LOWER THAN -2MB

AIR BOX ASSEMBLY

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

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

DHW TOO COOL

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

RESTRICTED OR BLOCKED LOW DHW TEMP

HEAT EXCHANGER DHW

Next: End

RESTRICTED CAUSING POOR DHW

HEAT EXCHANGER - CONDENSING

Next: End

NOT RECOGNISING CH DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

NOT FIRING FOR CH

Next: End

NO POWER TO EXTERNAL CONTROLS

Next: End

NOT SENDING CH DEMAND TO MAIN PCB

PCB AUXILIARY

Next: End

BOILER NOISY

HEAT EXCHANGER DHW

Next: End

NOISY ON DHW

HEAT EXCHANGER - CONDENSING

Next: End

NOT FIRING FOR CH 2

Next: End

NO POWER TO EXTERNAL CONTROLS 2

Next: End

NOT SENDING CH DEMAND TO MAIN PCB 2

PCB AUXILIARY

Next: End

NOT RECOGNISING CH DEMAND 2

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

DHW TOO COOL DHW HOT AND COLD

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

RESTRICTED OR BLOCKED DHW HOT AND COLD

HEAT EXCHANGER DHW

Next: End

DHW HOT AND COLD

HEAT EXCHANGER - CONDENSING

Next: End

NOT FIRING FOR CH 3

Next: End

NO POWER TO EXTERNAL CONTROLS 3

Next: End

NOT SENDING CH DEMAND TO MAIN PCB 3

PCB AUXILIARY

Next: End

NOT RECOGNISING CH DEMAND 3

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

FAILING PERFORMANCE TEST

COMBUSTION ADJUSTMENT

Next: End

UNABLE TO ADJUST TO CORRECT SETTINGS

GAS VALVE

Next: End

NO GOING TO CH POSITION

ACTUATOR DIVERTER VALVE

Next: End

BOILER TO TEMP AND RADS COLD

Next: End

KEEPING BOILER TEMPERATURE LOW

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

ALLOWING BOILER TO GET TOO HOT

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

RESTRICTED BLOCKED CAUSING CH NOISE

HEAT EXCHANGER - CONDENSING

Next: End

NOISE ON CH

Next: End

NOT FIRING FOR CH 4

Next: End

NO POWER TO EXTERNAL CONTROLS 4

Next: End

NOT SENDING CH DEMAND TO MAIN PCB 4

PCB AUXILIARY

Next: End

NOT RECOGNISING CH DEMAND 4

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

BLOWING FUSES

CABLE PUMP

Next: End

BLOWING FUSES GAS VALVE SECTION

CABLE - 230V ELECTRICITY SUPPLY

Next: End

SHOWING CORRECT PRESSURE BUT ERROR CODE ASWELL

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E06 AND E12 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E06 FAULT CODE 2

CABLE SENSORS

Next: End

E06 FAULT CODE

CABLE SENSORS

Next: End

E07 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E07 FAULT CODE

CABLE SENSORS

Next: End

E09 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E09 FAULT CODE

THERMAL FUSE

Next: End

E69 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E69 FAULT CODE

SWITCH - PRESSURE - PRIMARY CIRCUIT

Next: End

E19 FAULT CODE

CABLE - PROBE - TEMPERATURE INPUT

Next: End

E19 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

BLANK FOR CONFIGURATION 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK EXTERNAL TEMP PROBE

Z DIRECTION CHOICE OR CONTINUE

Next: End

NO AC POWER TO FAN E05 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

NOT RESPONDING TO DEMAND E05 FAULT CODE

FAN

Next: End

NO DC DEMAND E05 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E05 FAN DOES NOT RUN WITH DEMAND

FAN

Next: End

E05 FAN DOES NOT RUN WITH DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

E05 FAN RUNNING WITH DEMAND

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

FAN RUNNING CONTINUOUSLY 2 E05 FAULT CODE

PCB ELECTRONIC CONTROL - MAIN AND IGNITION

Next: End

SYSTEM PRESSURE RISES EXCESSIVELY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1149

DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: !p1247

BOILER DOES NOT RESPOND TO CENTRAL HEATING DEMAND

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: p1249

BOILER OVERHEATS BEFORE 90 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMP?

Next: !p1265

BOILER CONTINUES TO HEAT PAST 90 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMP?

Next: !p1267

FAN RUNS CONTINUOUSLY AT LOW SPEED

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON STARTUP

Next: p1318

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p1362

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p1375

DISPLAY ILLUMINATED BUT FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p203

DISPLAY DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p156

FAN RUNS CONTINUOUSLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p1337

FLOW LIMITER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION TURBINE, FILTER AND FLOW LIMITER

Next: !p251

FILTER RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION TURBINE, FILTER AND FLOW LIMITER

Next: !p253

TURBINE RESTRICTED, BLOCKED OR JAMMED

CHARACTERISTIC TEST FROM INSPECTION TURBINE, FILTER AND FLOW LIMITER

Next: !p255

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: p296

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

PRESSURE REACHES 2 - 2.5MB BUT DOESN'T CHANGE TO 0.5 DURING SPARKING

CHARACTERISTIC TEST FROM PRESSURE FAN THROUGH IGNITION CYCLE

Next: p363

FAN PRESSURE DOES NOT REACH 2 - 2.5MB OR PRESSURE IS NEGATIVE

CHARACTERISTIC TEST FROM PRESSURE FAN THROUGH IGNITION CYCLE

Next: p365

FAN PRESSURE EXCEEDS 2 - 2.5MB (EG 4MB)

CHARACTERISTIC TEST FROM PRESSURE FAN THROUGH IGNITION CYCLE

Next: p409

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: p426

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

DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: !p456

BOILER DOES NOT RESPOND TO CENTRAL HEATING DEMAND

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: p458

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: p508

DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: !p537

BOILER DOES NOT RESPOND TO CENTRAL HEATING DEMAND

CHARACTERISTIC TEST FROM DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

Next: p539

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

FAN RUNS CONTINUOUSLY AT HIGH SPEED

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON STARTUP

Next: p918

FAN DOES NOT RUN AS DESCRIBED

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON STARTUP

Next: p877

09/07/2018 12:09:21 1806_1_50_1 20/07/2018 14:20:14

10/07/2018 12:20:04

Next: End

RESISTANCE THERMISTOR FLUE

REMOVE THE CONNECTOR FROM THE 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 TOP UP SYSTEM PRESSURE

Next: !p1133, f1123

RESISTANCE HARNESS PRESSURE SWITCH

REMOVE CONNECTOR CN10 FROM THE PCB
REMOVE CONNECTOR FROM PRESSURE SWITCH

Next: p1124, !f1125

VOLTAGE DC PRESSURE SWITCH SEND

NO DEMANDS

Next: !p1135, !f1129

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

VOLTAGE PUMP TO PUMP AT INTERFACE PCB

GAIN ACCESS TO INTERFACE PCB

Next: p1273, f1230

VOLTAGE PUMP INTO INTERFACE PCB FROM MAIN PCB

GAIN ACCESS TO INTERFACE PCB

Next: !p1231, f1232

RESISTANCE HARNESS 240 V MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p1233, !f1234

DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p1245, ?1246, ?1248

VOLTAGE EXTERNAL CONTROLS SEND AT TERMINAL STRIP

Next: !p1252, f1253

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p1254, !f1255

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p1258, !f1259

RESISTANCE HARNESS PRESSURE SWITCH

REMOVE CONNECTOR CN10 FROM THE PCB
REMOVE CONNECTOR FROM PRESSURE SWITCH

Next: !p1327, !f1328

RESISTANCE HARNESS FLOW TURBINE

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

Next: !p1331, !f1332

RESISTANCE HARNESS FLAT DISPLAY PCB

DISCONNECT CONNECTOR CN8 FROM THE MAIN PCB
DISCONNECT CONNECTOR CN1 FROM THE DISPLAY PCB

Next: !p1335, !f1336

VOLTAGE DC FAN NEUTRAL

NO DEMANDS

Next: !p1356, !f1357

VOLTAGE FROST THERMOSTAT

GAIN ACCESS TO THE APPLIANCE TERMINAL STRIP
NO DEMANDS

Next: p1379, !f1386

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p1382, !f1383

OBSERVATION DHW DEMAND

NO DEMANDS

Next: p1400, !f1401

OBSERVATION REMOVE FLOW SENSOR CONNECTOR

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

Next: !p1404, !f1405

RESISTANCE FUSE MAINS

REMOVE THE MAINS FUSE FROM ITS HOLDER

Next: !p158, f159

FURTHER INVESTIGATION FUSE MAINS

Next: !p160, !f161

FURTHER INVESTIGATION FUSE F1 MAIN PCB

Next: !p165, !f166

FURTHER INVESTIGATION FUSE F2 MAIN PCB

Next: !p201, !f202

RESISTANCE HARNESS FAN AC

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

Next: !p208, !f209

RESISTANCE HARNESS FAN DC

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

Next: !p210, !f211

INSPECTION ISOLATION VALVE DHW

Next: p248, !f256

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 TO PUMP AT INTERFACE PCB

GAIN ACCESS TO INTERFACE PCB

Next: p1269, f270

VOLTAGE PUMP INTO INTERFACE PCB FROM MAIN PCB

GAIN ACCESS TO INTERFACE PCB

Next: !p280, f281

RESISTANCE HARNESS 240 V MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN2 FROM THE MAIN PCB
REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p282, !f283

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p286, !f289

RESISTANCE HARNESS GAS VALVE

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

Next: !p380, !f381

VOLTAGE TO DIVERTER VALVE (DHW)

{GAINPCBACS}

Next: p435, !f436

DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p454, ?455, ?457

VOLTAGE EXTERNAL CONTROLS SEND AT TERMINAL STRIP

Next: !p465, f466

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p468, !f467

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p470, !f471

VOLTAGE EXTERNAL CONTROLS SEND AT TERMINAL STRIP

Next: !p511, f512

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p513, !f514

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p517, !f518

DIFFERENTIAL TEMPERATURE PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p535, ?536, ?538

VOLTAGE EXTERNAL CONTROLS SEND AT TERMINAL STRIP

Next: !p542, f543

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p544, !f545

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p548, !f549

OBSERVATION CAN COMBUSTION BE ADJUSTED

BOILER IN SERVICE MODE

Next: !p610, f611

INSPECTION AIR IMPULSE TUBE

REMOVE THE AIR IMPULSE TUBE FROM THE GAS VALVE AND THE AIR BOX ASSEMBLY

Next: p612, !f613

VOLTAGE TO DIVERTER VALVE (CH)

{GAINPCBACS}

Next: p634, !f635

VOLTAGE EXTERNAL CONTROLS RECEIVE AT TERMINAL STRIP

GAIN ACCESS TO APPLIANCE TERMINAL STRIP

Next: p694, f695

VOLTAGE EXTERNAL CONTROLS SEND AT TERMINAL STRIP

Next: !p696, f697

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p698, !f699

RESISTANCE HARNESS INTERFACE PCB TO TERMINAL STRIP

REMOVE CONNECTOR CN1 FROM THE INTERFACE PCB

Next: !p702, !f703

RESISTANCE PUMP AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN2 FROM THE INTERFACE PCB

Next: p725, f727

RESISTANCE PUMP FOR FUSE INVESTIGATION

REMOVE CONNECTOR FROM PUMP ASSEMBLY
(FOLLOW INSTRUCTIONS ON THE CONNECTOR)

Next: !p731, !f732

RESISTANCE GAS VALVE FOR FUSE INVESTIGATION

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p733, !f734

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

Next: !p756, f1122

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR CN6 FROM THE MAIN PCB

Next: p758, f760

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: !p764, !f765

RESISTANCE THERMISTOR RETURN

REMOVE THE CONNECTOR FROM THE RETURN THERMISTOR

Next: !p762, !f763

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

REMOVE THE CONNECTOR FROM THE FLUE THERMISTOR

Next: p774, !f775

INSPECTION PRESSURE SENSOR CONNECTOR

Next: p779, !f785

VOLTAGE DC PRESSURE SWITCH SEND

NO DEMANDS

Next: !p784, !f783

RESISTANCE DHW THERMISTOR INLET AND HARNESS

REMOVE CONNECTOR CN8 FROM THE INTERFACE PCB

Next: p791, f788

RESISTANCE DHW THERMISTOR INLET

REMOVE THE CONNECTOR FROM THE DHW INLET THERMISTOR

Next: !p789, !f790

INFORMATION BOILER CONFIGURATION

Next: !p797, !f798

INFORMATION EXTERNAL TEMPERATURE PROBE

Next: !p800, !f801

OBSERVATION FAN RUNS ON START UP

NO DEMANDS

Next: p873, ?874, ?876, ?1316

RESISTANCE HARNESS FAN AC

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

Next: !p880, !f881

RESISTANCE HARNESS FAN DC

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

Next: !p884, !f885

VOLTAGE DC DEMAND AT FAN

NO DEMANDS

Next: !p896, f897

RESISTANCE HARNESS FAN DC

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

Next: !p898, !f899

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: p1105, !f1110

INSPECTION AIR IMPULSE TUBE

REMOVE THE AIR IMPULSE TUBE FROM THE GAS VALVE AND THE AIR BOX ASSEMBLY

Next: p1106, !f1111

INSPECTION BURNER

REMOVE THE BURNER

Next: p1279, !f1112

RESISTANCE DIVERTER VALVE MOTOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE MAIN PCB

Next: !p1114, f1115

VOLTAGE DC PRESSURE SWITCH RECEIVE

{GAINPCBACS}
NO DEMANDS

Next: !p1126, f1127

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: p1221, !f1222

RESISTANCE THERMISTOR RETURN

REMOVE THE CONNECTOR FROM THE RETURN THERMISTOR

Next: p1223, !f1224

OBSERVATION SYSTEM PRESSURE AND AIR

NO DEMANDS

Next: p1225, !f1226

OBSERVATION PUMP RUNNING

Next: p1227, f1228

PUMP TEST

Next: p1473, !f1242

DIFFERENTIAL TEMPERATURE DHW FOR OVERHEAT INVESTIGATION

ATTACH TEMPERATURE P

Next: p1243, f1244

OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMP?

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

Next: !p1262, ?1264, ?1266

VOLTAGE EXTERNAL CONTROLS RECEIVE AT TERMINAL STRIP

GAIN ACCESS TO APPLIANCE TERMINAL STRIP

Next: p1250, f1251

VOLTAGE EXTERNAL CONTROLS SEND AT INTERFACE PCB

GAIN ACCESS TO INTER

Next: p1256, f1257

RESISTANCE HARNESS FLAT MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN16 FROM THE MAIN PCB
REMOVE CONNECTOR CN7 FROM THE INTERFACE PCB

Next: !p1260, !f1261

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2

Next: p1407, !f1270

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2

Next: p1411, !f1274

INSPECTION FLUEWAYS

REMOVE THE COMBUSTION CHAMBER DOOR

Next: !p1277, !f1278

INSPECTION FLUE ASSEMBLY

Next: !p1280, !f1281

INSPECTION VALVES FLOW AND RETURN

Next: p631, !f1296

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p1299, !f1300

INSPECTION AIR BOX ASSEMBLY

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

Next: p1301, !f1302

INSPECTION BURNER

REMOVE THE BURNER

Next: p1304, !f1303

INSPECTION FLUEWAYS

REMOVE THE COMBUSTION CHAMBER DOOR

Next: p1307, !f1306

INSPECTION FLUE ASSEMBLY

Next: !p1309, !f1308

RESISTANCE HARNESS FAN DC

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

Next: p1319, !f1320

VOLTAGE DC FAN NEUTRAL

NO DEMANDS

Next: !p1321, !f1322

OBSERVATION PRESSURE SWITCH DISCONNECTION

NO DEMANDS
REMOVE CONNECTOR CN10 FROM THE MAIN PCB AND MAKE SAFE

Next: p1325, f1326

OBSERVATION FLOW TURBINE DISCONNECTION

REMOVE CONNECTOR CN12 FROM THE PCB AND MAKE SAFE
NO DEMANDS

Next: p1329, f1330

VOLTAGE DISPLAY PCB AT HARNESS

DISCONNECT CONNECTOR CN1 FROM THE DISPLAY PCB
POSITION AS SHOWN
NO DEMANDS

Next: !p1333, f1334

RESISTANCE HARNESS FAN DC

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

Next: p1344, !f1339

VOLTAGE DC FAN PERMANENT AT FAN

NO DEMANDS

Next: p1340, !f1341

VOLTAGE DC FAN DEMAND AT FAN RUNNING CONTINUOUSLY

NO DEMANDS

Next: !p1342, !f1343

OBSERVATION HOW FAST IS FAN RUNNING CONTINUOUSLY

NO DEMANDS

Next: p1338, f1355

OBSERVATION FROST PROTECTION SYMBOL?

NO DEMANDS

Next: p1390, f1378

FAULT CODES

Next: !p1376, !f1377

TEMPERATURE APPLIANCE

ATTACH TEMPERATURE C

Next: !p1380, f1381

RESISTANCE THERMISTOR RETURN

REMOVE THE CONNECTOR FROM THE RETURN THERMISTOR

Next: !p1384, !f1385

VOLTAGE EXTERNAL CONTROLS AT TERMINAL STRIP FIRING WITH NO DEMAND

GAIN ACCESS TO THE APPLIANCE TERMINAL STRIP
NO DEMANDS

Next: !p1406, f1399

OBSERVATION REMOVE FLOW SENSOR ASSEMBLY

REMOVE THE FLOW SENS

Next: !p1402, f1403

CAPACITANCE PUMP

MULTIMETER SET TO CA

Next: !p1408, !f1410

CAPACITANCE PUMP

MULTIMETER SET TO CA

Next: !p1412, !f1413

INSPECTION AIR IMPULSE TUBE

REMOVE THE AIR IMPULSE TUBE FROM THE GAS VALVE AND THE AIR BOX ASSEMBLY

Next: p1418, !f1422

INSPECTION AIR BOX ASSEMBLY

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

Next: p382, !f1423

INSPECTION IGNITION ELECTRODE AND BURNER GAP

REMOVE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: !p1425, !f1426

OBSERVATION SYSTEM PRESSURE AND AIR

NO DEMANDS

Next: p430, !f1446

OBSERVATION SYSTEM PRESSURE AND AIR

NO DEMANDS

Next: p1459, !f1471

PUMP TEST

Next: p680, !f1472

OBSERVATION FAN AND PUMP OVERRUN

Next: p1500, !f1527

INSPECTION BYPASS INTERNAL

BOILER PRIMARY CIRCU

Next: p1241, !f1528

INSPECTION AIR IMPULSE TUBE

REMOVE THE AIR IMPULSE TUBE FROM THE GAS VALVE AND THE AIR BOX ASSEMBLY

Next: p1533, !f1537

INSPECTION AIR BOX ASSEMBLY

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

Next: p305, !f1538

INSPECTION FLAME RECTIFICATION ELECTRODE AND BURNER GAP

REMOVE COMBUSTION DOOR ASSEMBLY COMPLETE WITH BURNER

Next: !p1540, !f1541

VOLTAGE MAINS POWER

{GAINPCBACS}

Next: p162, f157

RESISTANCE FUSE F1 MAIN PCB

REMOVE FUSE F1 FROM THE MAIN PCB

Next: p163, f164

RESISTANCE FUSE F2 MAIN PCB

REMOVE FUSE F2 FROM THE MAIN PCB

Next: p178, f200

RESISTANCE HARNESS MAINS INTO PCB

REMOVE CONNECTOR CN1 FROM THE MAIN PCB

Next: p1324, !f180

VOLTAGE AC FAN AT FAN

NO DEMANDS

Next: p204, f206

VOLTAGE DC DEMAND AT FAN

NO DEMANDS

Next: !p205, f207

INSPECTION TURBINE, FILTER AND FLOW LIMITER

ISOLATE THE COLD MAI

Next: !p249, ?250, ?252, ?254

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

RESISTANCE THERMISTOR RETURN

REMOVE THE CONNECTOR FROM THE RETURN THERMISTOR

Next: p287, !f290

RESISTANCE THERMISTOR DHW

REMOVE CONNECTOR FROM DHW THERMISTOR

Next: !p288, !f291

INSPECTION IGNITION ELECTRODE AND LEAD

REMOVE THE IGNITION ELECTRODE AND LEAD ASSEMBLY

Next: !p301, !f302

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p359, !f360

INSPECTION RECTIFICATION ELECTRODE AND LEAD

REMOVE THE RECTIFICA

Next: p303, !f307

INSPECTION CONDENSATE PIPE

Next: p1298, !f318

RESISTANCE HARNESS RECTIFICATION

REMOVE CONNECTOR T2 FROM THE MAIN PCB

Next: p1529, !f306

INSPECTION BURNER

REMOVE THE BURNER

Next: p1539, !f316

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p298, !f314

INSPECTION AIR IMPULSE TUBE

REMOVE THE AIR IMPULSE TUBE FROM THE GAS VALVE AND THE AIR BOX ASSEMBLY

Next: p300, !f342

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p330, !f358

PRESSURE FAN THROUGH IGNITION CYCLE

ATTACH TUBE TO LEFT HAND SIDE OF U GAUGE
ATTACH TUBE TO GAS VALVE OUTLET PRESSURE TEST POINT

Next: p361, ?362, ?364, ?366

INSPECTION IGNITION ELECTRODE AND LEAD

REMOVE THE IGNITION ELECTRODE AND LEAD ASSEMBLY

Next: p1414, !f383

VOLTAGE GAS VALVE

Next: p376, f377

INSPECTION AIR IMPULSE TUBE

REMOVE THE AIR IMPULSE TUBE FROM THE GAS VALVE AND THE AIR BOX ASSEMBLY

Next: p368, !f373

INSPECTION CONDENSATE PIPE

Next: p369, !f374

INSPECTION FLUE ASSEMBLY

Next: p370, !f375

INSPECTION BURNER

REMOVE THE BURNER

Next: p1276, !f372

RESISTANCE GAS VALVE SOLENOID

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p378, !f379

INSPECTION BURNER

REMOVE THE BURNER

Next: p1424, !f385

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: !p410, !f411

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

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: p449, !f474

RESISTANCE THERMISTOR RETURN

REMOVE THE CONNECTOR FROM THE RETURN THERMISTOR

Next: p477, !f475

PUMP TEST

Next: p451, !f476

DIFFERENTIAL TEMPERATURE DHW HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p452, f453

VOLTAGE EXTERNAL CONTROLS RECEIVE AT TERMINAL STRIP

GAIN ACCESS TO APPLIANCE TERMINAL STRIP

Next: p461, f464

VOLTAGE EXTERNAL CONTROLS SEND AT INTERFACE PCB

GAIN ACCESS TO INTER

Next: p462, f469

RESISTANCE HARNESS FLAT MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN16 FROM THE MAIN PCB
REMOVE CONNECTOR CN7 FROM THE INTERFACE PCB

Next: !p463, !f472

RESISTANCE THERMISTOR FLUE

REMOVE THE CONNECTOR FROM THE FLUE THERMISTOR

Next: p450, !f500

PUMP TEST

Next: p1427, !f521

VOLTAGE EXTERNAL CONTROLS RECEIVE AT TERMINAL STRIP

GAIN ACCESS TO APPLIANCE TERMINAL STRIP

Next: p509, f510

VOLTAGE EXTERNAL CONTROLS SEND AT INTERFACE PCB

GAIN ACCESS TO INTER

Next: p515, f516

RESISTANCE HARNESS FLAT MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN16 FROM THE MAIN PCB
REMOVE CONNECTOR CN7 FROM THE INTERFACE PCB

Next: !p519, !f520

RESISTANCE THERMISTOR DHW

REMOVE CONNECTOR FROM DHW THERMISTOR

Next: p523, !f524

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p525, !f526

RESISTANCE THERMISTOR RETURN

REMOVE THE CONNECTOR FROM THE RETURN THERMISTOR

Next: p527, !f528

RESISTANCE THERMISTOR FLUE

REMOVE THE CONNECTOR FROM THE FLUE THERMISTOR

Next: p529, !f530

PUMP TEST

Next: p531, !f532

DIFFERENTIAL TEMPERATURE DHW HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p533, f534

VOLTAGE EXTERNAL CONTROLS RECEIVE AT TERMINAL STRIP

GAIN ACCESS TO APPLIANCE TERMINAL STRIP

Next: p540, f541

VOLTAGE EXTERNAL CONTROLS SEND AT INTERFACE PCB

GAIN ACCESS TO INTER

Next: p546, f547

RESISTANCE HARNESS FLAT MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN16 FROM THE MAIN PCB
REMOVE CONNECTOR CN7 FROM THE INTERFACE PCB

Next: !p550, !f551

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p614, !f615

INSPECTION AIR BOX ASSEMBLY

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

Next: p616, !f617

INSPECTION FLUE ASSEMBLY

Next: p618, !f619

INSPECTION BURNER

REMOVE THE BURNER

Next: p620, !f621

INSPECTION FLUEWAYS

REMOVE THE COMBUSTION CHAMBER DOOR

Next: !p622, !f623

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: p646, !f647

RESISTANCE THERMISTOR RETURN

REMOVE THE CONNECTOR FROM THE RETURN THERMISTOR

Next: !p648, !f649

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

VOLTAGE EXTERNAL CONTROLS SEND AT INTERFACE PCB

GAIN ACCESS TO INTER

Next: p700, f701

RESISTANCE HARNESS FLAT MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN16 FROM THE MAIN PCB
REMOVE CONNECTOR CN7 FROM THE INTERFACE PCB

Next: !p704, !f705

RESISTANCE GAS VALVE AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN2 FROM THE MAIN PCB

Next: p726, f728

RESISTANCE FAN AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN2 FROM THE MAIN PCB

Next: p1113, f729

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE CONNECTOR CN11 FROM THE MAIN PCB

Next: !p759, f761

RESISTANCE HARNESS FLUE THERMISTOR AND THERMAL FUSE

REMOVE FLUE THERMIST

Next: !p777, !f776

RESISTANCE HARNESS PRESSURE SWITCH

REMOVE CONNECTOR CN10 FROM THE PCB
REMOVE CONNECTOR FROM PRESSURE SWITCH

Next: p780, !f786

VOLTAGE DC PRESSURE SWITCH RECEIVE

{GAINPCBACS}
NO DEMANDS

Next: !p781, f782

RESISTANCE INTERFACE PCB

REMOVE CONNECTOR CN7 FROM THE INTERFACE PCB
REMOVE CONNECTOR CN8 FROM THE INTERFACE PCB

Next: p793, !f792

RESISTANCE HARNESS FLAT MAIN PCB TO INTERFACE PCB

REMOVE CONNECTOR CN16 FROM THE MAIN PCB
REMOVE CONNECTOR CN7 FROM THE INTERFACE PCB

Next: !p795, !f794

OBSERVATION FAN RUNS WITH DHW DEMAND

BOILER DHW THERMOSTAT SET TO MAX

Next: p894, f895

VOLTAGE AC FAN AT FAN

NO DEMANDS

Next: p878, f879

VOLTAGE DC DEMAND AT FAN

NO DEMANDS

Next: !p882, f883

VOLTAGE DC FAN HALL SENSOR AT FAN

Next: p900, !f901

RESISTANCE HARNESS FAN DC

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

Next: !p902, !f903

RESISTANCE HARNESS FAN DC

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

Next: p919, !f920

VOLTAGE DC FAN PERMANENT AT FAN

NO DEMANDS

Next: p921, !f922

VOLTAGE DC FAN DEMAND AT FAN RUNNING CONTINUOUSLY

NO DEMANDS

Next: !p923, !f924

System Information

Total Tests: 592

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control