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:

Diagnostic Step

Next: &1, *

NO FAULT FOUND

Next: nff

47-283-44 SIME MERIDIAN 25 - CASE REMOVAL INSTRUCTIONS

Next: &2687, !f2

OBSERVATION BOILER INITIALISATION

ENSURE NO DEMANDS ARE PRESENT

Next: &902, ?4, ?6, ?8, ?27, ?735, ?2458, ?2619

TYPE OF DIAGNOSTIC PROCEDURE

Next: &12, !f11

OBSERVATION DHW FLOW RATE

Next: &13, f14

OBSERVATION FAN RUNNING DHW DEMAND

GAIN ACCESS TO FAN

Next: &141, f1940

OBSERVATION PUMP RUNNING

Next: &143, f142

OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: &208, ?204, ?206, ?2692

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: &211, !f209

OPERATION DHW

Next: &2340, ?213, ?217, ?219, ?221

OBSERVATION DOES BOILER RESPOND TO A CH DEMAND

ENSURE WINTER ICON IS IN THE DISPLAY

Next: &225, f2043

CH OPERATION

ENSURE CH CONTROLS ARE CALLING FOR HEAT

Next: &264, ?236, ?238, ?240

OBSERVATION PUMP OVERRUN

ENSURE CH CONTROLS ARE CALLING FOR HEAT

Next: &272, !f265

OBSERVATION ANTI CYCLE DELAY

BOILER CH TEMPERATURE SET TO 50°C
(PRESS THE RADIATOR SYMBOL THEN THE - KEY TO LOWER TO 50)

Next: &nff, !f833

FURTHER INVESTIGATION FUSE BLOWN

INTENTIONALLY BLANK

Next: &nff, f382

LOW WATER PRESSURE ERROR AL 02

Next: &nff, f310

CH SENSOR ERROR AL 05

INTENTIONALLY BLANK

Next: &nff, f312

LOCKOUT AL 06

Next: &nff, f314

SAFETY THERMOSTAT ERROR AL 07

INTENTIONALLY BLANK

Next: &nff, f684

FLAME DETECTION ERROR AL 08

INTENTIONALLY BLANK

Next: &nff, f2449

DHW SENSOR ERROR AL 10

INTENTIONALLY BLANK

Next: &nff, f320

ACTIVATION OF EXHAUST TEMPERATURE SENSOR AL 13

INTENTIONALLY BLANK

Next: &nff, f322

EXHAUST TEMPERATURE SENSOR ERROR AL 14

INTENTIONALLY BLANK

Next: &nff, f324

FAN ERROR AL 15

INTENTIONALLY BLANK

Next: &nff, f424

PARAMETER 18 - RE-IGNITION DELAY


TO ACCESS THE PA

Next: &nff, !f877

PARAMETER 10 - ANTI-FREEZE PROTECTION TEMPERATURE


TO ACCESS THE PA

Next: &nff, !f881

PARAMETER 15 - % OF MAXIMUM HEATING OUTPUT


TO ACCESS THE PA

Next: &nff, !f882

PARAMETER 14 - MAXIMUM HEATING TEMPERATURE


TO ACCESS THE PA

Next: &nff, !f890

FAULT CODE HISTORY


TO ACCESS THE FA

Next: &nff, !f900

INITIAL SETUP INFORMATION PAGE

Next: &10, !f903

FAULT CODES USING FAULT CODE HISTORY FOR GUIDANCE

Next: &nff, !f1364

LOCKOUT AL 06 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f1366

SAFETY THERMOSTAT ERROR AL 07 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f1369

COMBUSTION PERFORMANCE ANALYSIS

ACTIVATE CHIMNEY SWEEP FUNCTION

Next: &223, f2742

CH SENSOR ERROR AL 05 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f2502

DHW SENSOR ERROR AL 10 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f2508

EXHAUST TEMPERATURE SENSOR ERROR AL 14 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f2514

LOW WATER PRESSURE ERROR AL 02 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f2559

FLAME DETECTION ERROR AL 08 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f2574

FAN ERROR AL 15 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f2580

ACTIVATION OF EXHAUST TEMPERATURE SENSOR ERROR AL 13 USING FAULT CODE HISTORY

INTENTIONALLY BLANK

Next: &nff, f2663

IMPORTANT INFORMATION

Next: &3, !f2688

TYPE OF DIAGNOSTIC PROCEDURE

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 13

PREMIX - BURNER

Next: End

ERROR AL 13

FLUE

Next: End

ERROR AL 13

CONDENSATE TRAP AND/OR PIPEWORK

Next: End

ERROR AL 13

AIR-GAS HOSE

Next: End

ERROR AL 13

PIPE 40 - AIR INTAKE

Next: End

DC CIRCUITRY

FAN

Next: End

FAN ERROR AL 15

CONNECTOR 4 POLE - CABLE

Next: End

FAN ERROR 1

PCB - MAIN

Next: End

FAN ERROR AL 15

CONNECTOR 5 POLE - CABLE

Next: End

FAN ERROR

PCB - MAIN

Next: End

FAN ERROR 2

PCB - MAIN

Next: End

FAN ERROR 4

PCB - MAIN

Next: End

FAN ERROR 3

PCB - MAIN

Next: End

FAULT CODES USING FAULT CODE HISTORY FOR GUIDANCE

Z DIRECTION CHOICE OR CONTINUE

Next: End

OVERHEAT USING FAULT CODE HISTORY

SENSOR - TEMPERATURE

Next: End

NO POWER TO PUMP USING FAULT CODE HISTORY

PCB - MAIN

Next: End

PUMP DOES NOT RUN USING FAULT CODE HISTORY

CONNECTOR 6 POLE - CABLE

Next: End

OVERHEAT USING FAULT CODE HISTORY

PUMP - CIRCULATING

Next: End

OVERHEAT OVERRUN NOT WORKING USING FAULT CODE HISTORY

PCB - MAIN

Next: End

OVERHEAT USING FAULT CODE HISTORY 1

BODY - MAIN EXCHANGER

Next: End

OVERHEAT USING FAULT CODE HISTORY

Next: End

FAN RUNNING CONTINUOUSLY

CONNECTOR 4 POLE - CABLE

Next: End

NO POWER TO PUMP

PCB - MAIN

Next: End

NO PERMANENT DC VOLTAGE TO FAN

PCB - MAIN

Next: End

FAN DOES NOT RUN BLANK DISPLAY 2

PCB - MAIN

Next: End

FAN DOES NOT RUN BLANK DISPLAY

CONNECTOR 5 POLE - CABLE

Next: End

FAN DOES NOT RUN BLANK DISPLAY

CONNECTOR 4 POLE - CABLE

Next: End

FAN DOES NOT RUN BLANK DISPLAY 3

PCB - MAIN

Next: End

DISPLAY DOES NOT ILLUMINATE

FUSE F1

Next: End

FAN DOES NOT RUN BLANK DISPLAY

SENSOR - TEMPERATURE

Next: End

PUMP DOES NOT RUN

CONNECTOR 6 POLE - CABLE

Next: End

LOCKOUT USING FAULT CODE HISTORY

INLET PRESSURE

Next: End

ENHANCED FAULT CODES 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

LOCKOUT USING FAULT CODE HISTORY

CONDENSATE TRAP AND/OR PIPEWORK

Next: End

OVERHEAT

CONNECTOR 14 POLE - CABLE

Next: End

NOT FULLY OPEN

BALL COCK 1/2 IN X 15MM

Next: End

FAN DOES NOT RUN BLANK DISPLAY

SENSOR - TEMPERATURE

Next: End

FAN DOES NOT RUN BLANK DISPLAY

LIMIT THERMOSTAT 80°C - AUTO RESET

Next: End

FAN DOES NOT RUN BLANK DISPLAY

THERMOSTAT 100 °C - SAFETY

Next: End

FAN DOES NOT RUN BLANK DISPLAY

CONNECTOR 14 POLE - CABLE

Next: End

OVERHEAT USING FAULT CODE HISTORY

LIMIT THERMOSTAT 80°C - AUTO RESET

Next: End

OVERHEAT USING FAULT CODE HISTORY

THERMOSTAT 100 °C - SAFETY

Next: End

OVERHEAT

LIMIT THERMOSTAT 80°C - AUTO RESET

Next: End

OVERHEAT

THERMOSTAT 100 °C - SAFETY

Next: End

FAN DOES NOT RUN

SWITCH 1/2 INCH M - FLOW WATER

Next: End

FAN DOES NOT RUN

PCB - MAIN

Next: End

FAN DOES NOT RUN

CONNECTOR 5 POLE - CABLE

Next: End

FAN DOES NOT RUN

CONNECTOR 4 POLE - CABLE

Next: End

FAN DOES NOT RUN 1

PCB - MAIN

Next: End

OUT OF CALIBRATION FAN DOES NOT RUN

SENSOR - TEMPERATURE

Next: End

OUT OF CALIBRATION FAN DOES NOT RUN

SENSOR - TEMPERATURE

Next: End

FAN DOES NOT RUN

HYDRAULIC CONFIGURATION ADJUSTMENT

Next: End

NOT OPENING TO RADS

3-WAY ASSEMBLY

Next: End

OPEN WHEN SHOULDN'T BE CAUSING RADS NOT TO HEAT

Next: End

BLANK DISPLAY

PCB - MAIN

Next: End

BLOWING FUSES

GAS VALVE - SIT

Next: End

CASE REMOVAL

Z DIRECTION CHOICE OR CONTINUE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

ELECTRODE - IONISATION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

MIXER ASSEMBLY

Next: End

ERROR AL 05

PCB - MAIN

Next: End

ERROR AL 10

PCB - MAIN

Next: End

ERROR AL 14

PCB - MAIN

Next: End

DOES NOT RESPOND TO CH DEMAND 5

CONNECTOR - 9 POLE - STOCKO

Next: End

DOES NOT RESPOND TO CH DEMAND 8

CONNECTOR - 9 POLE - STOCKO

Next: End

DOES NOT RESPOND TO CH DEMAND

CONNECTOR - 9 POLE - STOCKO

Next: End

DHW COOL RADS COOL AS PUMP WEAK

PUMP - CIRCULATING

Next: End

DHW COOL RADS COOL

PIPE 40 - AIR INTAKE

Next: End

BURNER IGNITES BUT BAFFLES OUT

PIPE 40 - AIR INTAKE

Next: End

BURNER IGNITES BUT BAFFLES OUT

FLUE

Next: End

BURNER IGNITES BUT BAFFLES OUT

BODY - MAIN EXCHANGER

Next: End

LOW PRESSURE

INLET PRESSURE

Next: End

INADEQUATE SUPPLY PRESSURE

COLD WATER SUPPLY

Next: End

DHW RUNS HOT AND COLD

SENSOR - TEMPERATURE

Next: End

DHW RUNS HOT THEN COLD

SENSOR - TEMPERATURE

Next: End

DHW COOL RADS COOL

SENSOR - TEMPERATURE

Next: End

DHW COOL RADS COOL

SENSOR - TEMPERATURE

Next: End

DHW TOO HOT

SENSOR - TEMPERATURE

Next: End

OVERHEAT USING FAULT CODE HISTORY

SYSTEM PRESSURE

Next: End

OVERHEAT

SYSTEM PRESSURE

Next: End

ERROR AL 02

SYSTEM PRESSURE

Next: End

BLOCKED CAUSING ERROR AL 02

PRESSURE GAUGE

Next: End

ERROR AL 13

SYSTEM PRESSURE

Next: End

ERROR AL 13

PUMP - CIRCULATING

Next: End

ERROR AL 13

SENSOR - NTC

Next: End

INCORRECT FLOW RATE

ADJUSTER - WATER RATE - 12 L/MIN

Next: End

BLOCKED CAUSING OVERHEAT

PRESSURE GAUGE

Next: End

OVERHEAT ERROR AL 07

BALL COCK 3/4 IN X 22MM

Next: End

NO POWER TO DIVERTER FOR DHW

PCB - MAIN

Next: End

POWER TO DIVERTER VALVE DHW

CONNECTOR 5 POLE - CABLE

Next: End

OVERHEAT ERRO AL 07 USING FAULT CODE HISTORY

BALL COCK 3/4 IN X 22MM

Next: End

BLOCKED CAUSING OVERHEAT USING FAULT CODE HISTORY

PRESSURE GAUGE

Next: End

BOILER FIRES NO DEMAND 2

PCB - MAIN

Next: End

BOILER FIRES WITH NO DEMAND

DHW SYSTEM

Next: End

BOILER FIRES WITH NO DEMAND

SWITCH 1/2 INCH M - FLOW WATER

Next: End

LOCKOUT USING FAULT CODE HISTORY

ELECTRODE - IGNITION

Next: End

LOCKOUT USING FAULT CODE HISTORY

ELECTRODE - IGNITION (SPARK GAP)

Next: End

NOT FULLY OPEN

BALL COCK 3/4 IN X 22MM

Next: End

LOCKOUT USING FAULT CODE HISTORY

ELECTRODE - IONISATION

Next: End

LOCKOUT USING FAULT CODE HISTORY 1

GAS VALVE - SIT

Next: End

LOCKOUT USING FAULT CODE HISTORY 1

AIR-GAS HOSE

Next: End

LOCKOUT USING FAULT CODE HISTORY

ELECTRODE - IGNITION (SPARK GAP TO BURNER)

Next: End

LOCKOUT USING FAULT CODE HISTORY

ELECTRODE - IONISATION (GAP)

Next: End

LOCKOUT USING FAULT CODE HISTORY 1

PREMIX - BURNER

Next: End

LOCKOUT USING FAULT CODE HISTORY 1

MIXER ASSEMBLY

Next: End

LOCKOUT USING FAULT CODE HISTORY 1

BODY - MAIN EXCHANGER

Next: End

LOCKOUT USING FAULT CODE HISTORY 1

PIPE 40 - AIR INTAKE

Next: End

BOILER REACHES TEMP RADS COLD

PUMP - CIRCULATING

Next: End

ERROR AL08

PCB - MAIN

Next: End

LOCKOUT USING FAULT CODE HISTORY

AIR-GAS HOSE

Next: End

LOCKOUT USING FAULT CODE HISTORY

PIPE 40 - AIR INTAKE

Next: End

LOCKOUT USING FAULT CODE HISTORY

PREMIX - BURNER

Next: End

LOCKOUT USING FAULT CODE HISTORY

MIXER ASSEMBLY

Next: End

LOCKOUT USING FAULT CODE HISTORY

BODY - MAIN EXCHANGER

Next: End

LOCKOUT USING FAULT CODE HISTORY

FLUE

Next: End

LOCKOUT USING FAULT CODE HISTORY

GAS VALVE - SIT

Next: End

INCORRECT FLOW RATE

SWITCH 1/2 INCH M - FLOW WATER

Next: End

OVERPRESSURING ON CH

EXPANSION VESSEL 8 LITRE - RECTANGULAR

Next: End

ERROR AL13

PCB - MAIN

Next: End

ERROR AL 13

CONNECTOR 6 POLE - CABLE

Next: End

ERROR AL 13

PRESSURE GAUGE

Next: End

ERROR AL 05 USING FAULT CODE HISTORY

SENSOR - TEMPERATURE

Next: End

ERROR AL 02 USING FAULT CODE HISTORY

SYSTEM PRESSURE

Next: End

ERROR AL 02 USING FAULT CODE HISTORY

PRESSURE GAUGE

Next: End

NO POWER TO DIVERTER FOR CH

PCB - MAIN

Next: End

ERROR AL 08 USING FAULT CODE HISTORY

PCB - MAIN

Next: End

AL 15 ERROR 1

PCB - MAIN

Next: End

ERROR AL 15 USING FAULT CODE HISTORY

CONNECTOR 5 POLE - CABLE

Next: End

AL 15 ERROR 4

PCB - MAIN

Next: End

POWER TO DIVERTER VALVE CH

CONNECTOR 5 POLE - CABLE

Next: End

AL 15 ERROR 3

PCB - MAIN

Next: End

ERROR AL 15 USING FAULT CODE HISTORY

CONNECTOR 4 POLE - CABLE

Next: End

AL 15 ERROR

PCB - MAIN

Next: End

FURTHER INVESTIGATION AL05

Z DIRECTION CHOICE OR CONTINUE

Next: End

DISPLAY FLASHING 01

SENSOR - TEMPERATURE

Next: End

DISPLAY FLASHING 02

SENSOR - TEMPERATURE

Next: End

DISPLAY FLASHING 02

PCB - MAIN

Next: End

ERROR AL 10 USING FAULT CODE HISTORY

SENSOR - TEMPERATURE

Next: End

FURTHER INVESTIGATION AL10

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 14 USING FAULT CODE HISTORY

SENSOR - NTC

Next: End

FURTHER INVESTIGATION AL14

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL02

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL08

Z DIRECTION CHOICE OR CONTINUE

Next: End

OVERRUNS NOT WORKING

PCB - MAIN

Next: End

AL 15 ERROR 2

PCB - MAIN

Next: End

FURTHER INVESTIGATION AL15

Z DIRECTION CHOICE OR CONTINUE

Next: End

LOCKOUT USING FAULT CODE HISTORY 1

FLUE

Next: End

FURTHER INVESTIGATION AL06

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL07

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 13 USING FAULT CODE HISTORY

SYSTEM PRESSURE

Next: End

ERROR AL 13 USING FAULT CODE HISTORY

PRESSURE GAUGE

Next: End

ERROR AL 13 USING FAULT CODE HISTORY

PUMP - CIRCULATING

Next: End

FURTHER INVESTIGATION AL13

Z DIRECTION CHOICE OR CONTINUE

Next: End

NO POWER TO PUMP 1 USING FAULT CODE HISTORY

PCB - MAIN

Next: End

ERROR AL 13 USING FAULT CODE HISTORY

CONNECTOR 6 POLE - CABLE

Next: End

ERROR AL 13 USING FAULT CODE HISTORY

SENSOR - NTC

Next: End

MODEL INFO PAGE

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 13

Z DIRECTION CHOICE OR CONTINUE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

PCB - MAIN

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

ELECTRODE - IGNITION

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

PIPE 40 - AIR INTAKE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

MIXER ASSEMBLY

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

PREMIX - BURNER

Next: End

SPARKING DOES NOT OCCUR

ELECTRODE - IGNITION

Next: End

SPARKING DOES NOT OCCUR

ELECTRODE - IGNITION (SPARK GAP)

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

AIR-GAS HOSE

Next: End

SPARKING PRESENT NO IGNITION

PIPE 40 - AIR INTAKE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 1

MIXER ASSEMBLY

Next: End

SPARKING PRESENT NO IGNITION

BODY - MAIN EXCHANGER

Next: End

SPARKING PRESENT NO IGNITION

FLUE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

GAS VALVE - SIT

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

FLUE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

BODY - MAIN EXCHANGER

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CONDENSATE TRAP AND/OR PIPEWORK

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

INLET PRESSURE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

ELECTRODE - IGNITION (SPARK GAP TO BURNER)

Next: End

POOR COMBUSTION VALUES

AIR-GAS HOSE

Next: End

POOR COMBUSTION VALUES

PIPE 40 - AIR INTAKE

Next: End

POOR COMBUSTION VALUES

FLUE

Next: End

POOR COMBUSTION VALUES

PREMIX - BURNER

Next: End

POOR COMBUSTION VALUES

MIXER ASSEMBLY

Next: End

POOR COMBUSTION VALUES

BODY - MAIN EXCHANGER

Next: End

POOR COMBUSTION VALUES UNABLE TO ADJUST

GAS VALVE - SIT

Next: End

COMBUSTION PERFORMANCE ANALYSIS

COMBUSTION VALUE ADJUSTMENT

Next: End

FAILED COMBUSTION TEST

COMBUSTION CONFIGURATION

Next: End

BURNER IGNITES BUT BAFFLES OUT

AIR-GAS HOSE

Next: End

BURNER IGNITES BUT BAFFLES OUT

INLET PRESSURE

Next: End

BURNER IGNITES BUT BAFFLES OUT

CONDENSATE TRAP AND/OR PIPEWORK

Next: End

ERROR AL 10

SENSOR - TEMPERATURE

Next: End

FUSE FURTHER INVESTIGATION/DIVERTER VALVE COMPONENTS

DIVERTER VALVE COMPONENTS

Next: End

BLOWING FUSE

MOTOR - HONEYWELL DIVERTER VALVE

Next: End

BLOWING FUSES

PUMP - CIRCULATING

Next: End

BLOWING FUSE

CONNECTOR 5 POLE - CABLE

Next: End

DISPLAY DOES NOT ILLUMINATE

FUSE MAINS

Next: End

DHW RUNS HOT THEN COLD AS PUMP WEAK

PUMP - CIRCULATING

Next: End

BOILER AND SYSTEM TEMPERATURE LOW

MAXIMUM HEATING POWER ADJUSTMENT

Next: End

BURNER IGNITES BUT BAFFLES OUT

PREMIX - BURNER

Next: End

BURNER IGNITES BUT BAFFLES OUT

MIXER ASSEMBLY

Next: End

ERROR AL 14

SENSOR - NTC

Next: End

ERROR AL 05

SENSOR - TEMPERATURE

Next: End

OVERHEAT 1

LIMIT THERMOSTAT 80°C - AUTO RESET

Next: End

OVERHEAT 1

THERMOSTAT 100 °C - SAFETY

Next: End

OVERHEAT

SENSOR - TEMPERATURE

Next: End

NO POWER TO PUMP 1

PCB - MAIN

Next: End

PUMP DOES NOT RUN 1

CONNECTOR 6 POLE - CABLE

Next: End

OVERHEAT

PUMP - CIRCULATING

Next: End

OVERHEAT OVERRUN NOT WORKING

PCB - MAIN

Next: End

OVERHEAT

BODY - MAIN EXCHANGER

Next: End

OVERHEAT

Next: End

LOCKOUT AL 06

PCB - MAIN

Next: End

UNABLE TO GET APPLIANCE OUT OF STANDBY

PCB - MAIN

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

CONDENSATE TRAP AND/OR PIPEWORK

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

AIR-GAS HOSE

Next: End

ANTI CYCLE DELAY

PCB - MAIN

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

PREMIX - BURNER

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

ELECTRODE - IONISATION (GAP)

Next: End

FURTHER INVESTIGATION LOCKOUT

Z DIRECTION CHOICE OR CONTINUE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

INLET PRESSURE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

AIR-GAS HOSE

Next: End

PARAMETER 18

Z DIRECTION CHOICE OR CONTINUE

Next: End

PARAMETER 10

Z DIRECTION CHOICE OR CONTINUE

Next: End

PARAMETER 15

Z DIRECTION CHOICE OR CONTINUE

Next: End

BOILER AND SYSTEM TEMP LOW

SENSOR - TEMPERATURE

Next: End

BOILER AND SYSTEM TEMPERATURE LOW

MAXIMUM HEATING TEMPERATURE ADJUSTMENT

Next: End

PARAMETER 14

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE HISTORY

Z DIRECTION CHOICE OR CONTINUE

Next: End

INITIAL SETUP INFORMATION PAGE

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 13

BODY - MAIN EXCHANGER

Next: End

FAN RUNS CONTINIUOUSLY

PCB - MAIN

Next: End

FAN ERROR AL 15

FAN

Next: End

FAN ERROR

FAN

Next: End

FAULTY WINDINGS USING FAULT CODE HISTORY

PUMP - CIRCULATING

Next: End

OVERHEAT USING FAULT CODE HISTORY

HEAT EXCHANGER - PLATE TYPE

Next: End

OVERHEAT USING FAULT CODE HISTORY

PCB - MAIN

Next: End

FURTHER INVESTIGATION FUSE F1

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAN DOES NOT RUN BLANK DISPLAY

FAN

Next: End

FAN DOES NOT RUN BLANK DISPLAY 1

CONNECTOR 14 POLE - CABLE

Next: End

ENHANCED FAULT CODES 1

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULTY WINDINGS

PUMP - CIRCULATING

Next: End

ERROR AL 07

THERMAL FUSE

Next: End

FAN DOES NOT RUN BLANK DISPLAY

CONNECTOR - 9 POLE - STOCKO

Next: End

FAN DOES NOT RUN BLANK DISPLAY 1

PCB - MAIN

Next: End

FAN DOES NOT RUN BLANK DISPLAY

THERMAL FUSE

Next: End

ERROR AL 07 USING FAULT CODES

THERMAL FUSE

Next: End

ERROR AL07

THERMAL FUSE

Next: End

FAN DOES NOT RUN

CONNECTOR 14 POLE - CABLE

Next: End

FAN DOES NOT RUN

FAN

Next: End

FAN DOES NOT RUN 2

PCB - MAIN

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

Next: End

BLOWING FUSES

PCB - MAIN (FUSE BLOWN)

Next: End

BLOWING FUSE

CONNECTOR 6 POLE - CABLE

Next: End

FAULT CODE AL 05

FAULT CODE RESET

Next: End

FAULT CODE AL 10

FAULT CODE RESET

Next: End

FAULT CODE AL 14

FAULT CODE RESET

Next: End

DOES NOT RESPOND TO CH DEMAND 1

Next: End

DOES NOT RESPOND TO CH DEMAND 5

PCB - MAIN

Next: End

DOES NOT RESPOND TO CH DEMAND 2

Next: End

DOES NOT RESPOND TO CH DEMAND 8

PCB - MAIN

Next: End

DOES NOT RESPOND TO CH DEMAND

Next: End

DOES NOT RESPOND TO CH DEMAND

PCB - MAIN

Next: End

BURNER IGNITES BUT BAFFLES OUT

GAS VALVE - SIT

Next: End

DHW TOO HOT

PCB - MAIN

Next: End

ERROR AL 13

CONNECTOR 14 POLE - CABLE

Next: End

PASSING TO RADIATORS IN DHW MODE

3-WAY ASSEMBLY

Next: End

NOT MOVING TO DHW POSITION

MOTOR - HONEYWELL DIVERTER VALVE

Next: End

BOILER FIRES WITH NO DEMAND

Next: End

BOILER FIRES WITH NO DEMAND

PCB - MAIN

Next: End

BOILER FIRES WITH NO DEMAND

CONNECTOR 14 POLE - CABLE

Next: End

INCORRECT FLOW RATE

HEAT EXCHANGER - PLATE TYPE

Next: End

ERROR AL 08

PCB - MAIN

Next: End

ERROR AL 08

GAS VALVE - SIT

Next: End

LOCKOUT USING FAULT CODE HISTORY

COMBUSTION VALUE ADJUSTMENT

Next: End

BLOCKED

PIPE - EXPANSION VESSEL

Next: End

ERROR AL13

PUMP - CIRCULATING

Next: End

ERROR AL 05 USING FAULT CODE HISTORY

CONNECTOR 14 POLE - CABLE

Next: End

ERROR AL 02 USING FAULT CODE HISTORY

CONNECTOR - 9 POLE - STOCKO

Next: End

ERROR AL 02 USING FAULT CODE HISTORY

SWITCH - WATER PRESSURE

Next: End

AL 02 USING FAULT CODE HISTORY

SWITCH - WATER PRESSURE

Next: End

ERROR AL 02 USING FAULT CODE HISTORY

PUMP MANIFOLD

Next: End

ERROR AL 08 USING FAULT CODE HISTORY

GAS VALVE - SIT

Next: End

NOT MOVING TO CH POSITION

MOTOR - HONEYWELL DIVERTER VALVE

Next: End

ERROR AL 15

FAN

Next: End

FURTHER INVESTIGATION AL 05

Z DIRECTION CHOICE OR CONTINUE

Next: End

DISPLAY FLASHING 01

ANTI-FREEZE FUNCTION ACTIVATED

Next: End

DISPLAY FLASHING 01

PCB - MAIN

Next: End

DISPLAY FLASHING 01

CONNECTOR - 9 POLE - STOCKO

Next: End

DISPLAY FLASHING 02

ANTI-FREEZE FUNCTION ACTIVATED

Next: End

FLASHING 02

PCB - MAIN

Next: End

DISPLAY FLASHING 02

CONNECTOR - 9 POLE - STOCKO

Next: End

DISPLAY FLASHING 02

NORMAL OPERATION 2

Next: End

ERROR AL 10 USING FAULT CODE HISTORY

CONNECTOR - 9 POLE - STOCKO

Next: End

FURTHER INVESTIGATION AL 10

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 14 USING FAULT CODE HISTORY

CONNECTOR 14 POLE - CABLE

Next: End

FURTHER INVESTIGATION AL 14

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL 02

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL 08

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL 15

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL 06

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL 07

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION AL 13

Z DIRECTION CHOICE OR CONTINUE

Next: End

AL 13 ERROR USING FAULT CODE HISTORY

PUMP - CIRCULATING

Next: End

ERROR AL 13 USING FAULT CODE HISTORY

CONNECTOR 14 POLE - CABLE

Next: End

INCORRECT MIX

GAS VALVE - SIT

Next: End

SPARKING DOES NOT OCCUR

PCB - MAIN

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

FAN

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CONNECTOR 6 POLE - CABLE

Next: End

COMBUSTION VALUES

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 02

PCB - MAIN

Next: End

FURTHER INVESTIGATION BLANK DISPLAY

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 02

CONNECTOR - 9 POLE - STOCKO

Next: End

ERROR AL 02

SWITCH - WATER PRESSURE

Next: End

ERROR AL 02 BLOCKED

SWITCH - WATER PRESSURE

Next: End

ERROR AL 02

PUMP MANIFOLD

Next: End

ERROR AL 10

CONNECTOR - 9 POLE - STOCKO

Next: End

BLOWING FUSES

CONNECTOR 5 POLE - CABLE

Next: End

BLOWING FUSES

CONNECTOR 6 POLE - CABLE

Next: End

BLOWING FUSES

FAN

Next: End

FURTHER INVESTIGATION MAINS FUSE

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW COOL RADS COOL

PCB - MAIN

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER - PLATE TYPE

Next: End

DHW COOL RADS COOL

BODY - MAIN EXCHANGER

Next: End

BOILER AND SYSTEM TEMPERATURE LOW

PCB - MAIN

Next: End

NO MAINS SUPPLY

Next: End

DHW RUNS HOT THEN COLD

PCB - MAIN

Next: End

DHW RUNS HOT THEN COLD

HEAT EXCHANGER - PLATE TYPE

Next: End

DHW RUNS HOT THEN COLD

BODY - MAIN EXCHANGER

Next: End

ERROR AL14

CONNECTOR 14 POLE - CABLE

Next: End

ERROR AL05

CONNECTOR 14 POLE - CABLE

Next: End

OVERHEAT DOES NOT RESET

PCB - MAIN

Next: End

FAULTY WINDINGS 1

PUMP - CIRCULATING

Next: End

OVERHEAT

HEAT EXCHANGER - PLATE TYPE

Next: End

OVERHEAT

NORMAL OPERATION 1

Next: End

OVERHEAT 1

PCB - MAIN

Next: End

BOILER IN STANDBY MODE

Z DIRECTION CHOICE OR CONTINUE

Next: End

ERROR AL 13

PCB - MAIN

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

PCB - MAIN

Next: End

LOCKOUT

NORMAL OPERATION

Next: End

BOILER OVERHEATS BEFORE 85 °C IS REACHED

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: p1393

BOILER CONTINUES TO HEAT BEYOND 85 °C

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: !p1395

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p205

BURNER IGNITES BUT BAFFLES OUT/OR NOISY

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p285

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p214

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p218

TEMPERATURE RISE UNSATISFACTORY, RADIATORS REMAIN COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p220

TEMPERATURE RISE UNSATISFACTORY, RADIATORS HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p222

BOILER REACHES TEMPERATURE RADIATORS COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p237

BOILER AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: p239

SYSTEM PRESSURE RISES EXCESSIVELY AS RADIATORS HEAT UP

CHARACTERISTIC TEST FROM CH OPERATION

Next: p241

DISPLAY FLASHING 01

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p2612

WATER PRESSURE SWITCH BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: !p2570

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: !p2572

DISPLAY FLASHING 02

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p2620

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p2693

FAN RUNS CONTINUOUSLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p28

WATER PRESSURE SWITCH BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: !p344

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: !p346

DISPLAY DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p5

BOILER DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: p2038

TEMPERATURE DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: !p474

BOILER DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: p2033

TEMPERATURE DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SWITCH MANIFOLD

Next: !p545

BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p2358

BOILER OVERHEATS BEFORE 85 °C IS REACHED

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: p718

BOILER CONTINUES TO HEAT BEYOND 85 °C

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: !p720

- - IN DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p736

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION BOILER INITIALISATION

Next: p9

02/03/2016 12:13:18 1601_1_50_1 08/04/2016 14:10:25

15/03/2016 15:58:25

Next: End

INSPECTION CONDENSATE PIPE

Next: p1152, !f1166

VOLTAGE AC PERMANENT TO FAN

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p1348, !f1349

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1639, !f1640

OBSERVATION SYSTEM PRESSURE

Next: p2142, !f2172

VOLTAGE PUMP AT PCB

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p1376, !f1377

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: !p1386, !f1387

INSPECTION ISOLATION VALVE HW

Next: p18, !f19

VOLTAGE PUMP AT PCB

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p144, !f145

FURTHER INVESTIGATION FUSE F1

Next: !p1565, !f1566

RESISTANCE CH SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p1579, f1580

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: !p1581, !f1582

RESISTANCE DHW SENSOR

REMOVE THE LEADS FROM THE DHW SENSOR

Next: !p1902, !f1903

RESISTANCE LIMIT STAT

REMOVE THE LEADS FROM THE LIMIT STAT

Next: p1906, !f1907

INSPECTION PARAMETER 02 - HYDRAULIC CONFIGURATION

Next: p1941, !f1961

RESISTANCE WATER FLOW SWITCH

REMOVE BOTH OF THE LEADS FROM THE WATER FLOW SWITCH

Next: !p1944, !f1945

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: p1956, !f1957

RESISTANCE GAS VALVE FOR FUSE INVESTIGATION

REMOVE THE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p1971, !f1972

RESISTANCE EXTERNAL CONTROL HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB
ENSURE ROOM THERMOSTAT IS TURNED UP

Next: !p2036, !f2037

RESISTANCE EXTERNAL CONTROL HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB
ENSURE ROOM THERMOSTAT IS TURNED UP

Next: !p2041, !f2042

BYPASS EXTERNAL CONTROLS

INSERT A WIRE LINK TO BYPASS THE EXTERNAL CONTROLS
(AS INDICATED BELOW BY THE RED WIRE LINK)

Next: !p2044, f2045

RESISTANCE EXTERNAL CONTROL HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB
ENSURE ROOM THERMOSTAT IS TURNED UP

Next: !p2046, !f2047

RESISTANCE EXHAUST TEMPERATURE SENSOR

REMOVE THE CONNECTOR FROM THE EXHAUST TEMPERATURE SENSOR

Next: !p2266, !f2267

VOLTAGE TO DIVERTER VALVE (DHW DEMAND)

GAIN ACCESS TO PCB

Next: p230, !f231

DISCONNECT EXTERNAL CONTROLS

DISCONNECT EXTERNAL CONTROLS AT TERMINALS 5 AND 6 MAKE SAFE

Next: !p2361, !f2362

RESISTANCE WATER FLOW SWITCH

REMOVE BOTH OF THE LEADS FROM THE WATER FLOW SWITCH

Next: !p2367, !f2368

OBSERVATION DOES BURNER EXTINGUISH ON DEMAND END

Next: !p2450, f2451

VOLTAGE GAS VALVE BURNER SHUT DOWN

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED

Next: !p2452, !f2453

VOLTAGE TO DIVERTER VALVE (CH DEMAND)

GAIN ACCESS TO PCB

Next: p256, !f257

INSPECTION AIR/GAS HOSE

REMOVE THE AIR/GAS HOSE

Next: p2479, !f2480

RESISTANCE CH SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p2599, f2549

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: p2631, f2632

RESISTANCE EXHAUST TEMPERATURE SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p2637, f2638

VOLTAGE PUMP AT PCB

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p2541, !f2542

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: !p2550, !f2551

OBSERVATION SYSTEM PRESSURE

Next: p2560, !f2561

RESISTANCE WATER PRESSURE SWITCH

REMOVE THE LEADS FROM THE WATER PRESSURE SWITCH

Next: !p2566, f2567

INSPECTION WATER PRESSURE SWITCH AND MANIFOLD

DISCHARGE APPLIANCE PRIMARY WATER
REMOVE THE WATER PRESSURE SWITCH FROM THE PUMP MANIFOLD

Next: !p2568, ?2569, ?2571

OBSERVATION DOES BURNER EXTINGUISH ON DEMAND END

Next: p2646, f2576

VOLTAGE GAS VALVE BURNER SHUT DOWN

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED

Next: !p2577, !f2578

OBSERVATION IS FAN RUNNING DHW DEMAND

GAIN ACCESS TO FAN

Next: p2581, f2582

VOLTAGE AC PERMANENT TO FAN

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p2583, !f2584

RESISTANCE CH SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: !p2615, f2616

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: !p2617, !f2618

OBSERVATION RESET APPLIANCE - DOES 02 DISAPPEAR ?

Next: !p2629, !f2630

RESISTANCE CH SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: !p2625, f2626

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: !p2627, !f2628

RESISTANCE DHW SENSOR

REMOVE THE LEADS FROM THE DHW SENSOR

Next: !p2633, !f2634

RESISTANCE EXHAUST TEMPERATURE SENSOR

REMOVE THE CONNECTOR FROM THE EXHAUST TEMPERATURE SENSOR

Next: !p2639, !f2640

RESISTANCE EXHAUST TEMPERATURE SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p2664, f2665

RESISTANCE EXHAUST TEMPERATURE SENSOR

REMOVE THE CONNECTOR FROM THE EXHAUST TEMPERATURE SENSOR

Next: !p2684, !f2685

VOLTAGE PUMP AT PCB

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p2678, !f2679

RESISTANCE IGNITION ELECTRODE AND LEAD

ENSURE IGNITION ELECTRODE IS REMOVED FROM THE BURNER DOOR
DISCONNECT LEAD AT PCB

Next: p2720, !f2721

INSPECTION AIR/GAS HOSE

REMOVE THE AIR/GAS HOSE

Next: p2724, !f2725

RESISTANCE GAS VALVE

REMOVE THE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p2734, !f2735

INSPECTION PARAMETER 01 - COMBUSTION CONFIGURATION

Next: p2743, !f2760

RESISTANCE FUSE MAINS

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p499, f40

OBSERVATION SYSTEM PRESSURE

Next: p2206, !f2217

RESISTANCE CH SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p2024, f352

OBSERVATION RESET APPLIANCE - LOCKOUT

Next: p727, !f728

RESISTANCE FUSE F1

REMOVE THE FUSE FROM THE PCB

Next: p1515, f1564

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: p2027, f356

RESISTANCE EXHAUST TEMPERATURE SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p2219, f2265

RESISTANCE EXHAUST TEMPERATURE SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p2030, f360

RESISTANCE WATER PRESSURE SWITCH

REMOVE THE LEADS FROM THE WATER PRESSURE SWITCH

Next: !p339, f341

INSPECTION WATER PRESSURE SWITCH AND MANIFOLD

DISCHARGE APPLIANCE PRIMARY WATER
REMOVE THE WATER PRESSURE SWITCH FROM THE PUMP MANIFOLD

Next: !p342, ?343, ?345

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: !p671, !f672

RESISTANCE DHW SENSOR

REMOVE THE LEADS FROM THE DHW SENSOR

Next: !p357, !f358

RESISTANCE EXHAUST TEMPERATURE SENSOR

REMOVE THE CONNECTOR FROM THE EXHAUST TEMPERATURE SENSOR

Next: !p668, !f669

INSPECTION DIVERTER VALVE FOR FUSE INVESTIGATION

REMOVE ELECTRICAL CO

Next: p383, !f384

RESISTANCE DIVERTER VALVE MOTOR FOR FUSE INVESTIGATION

REMOVE ELECTRICAL CONNECTOR FROM THE DIVERTER MOTOR

Next: !p387, !f388

RESISTANCE PUMP FOR FUSE INVESTIGATION

REMOVE PUMP COVER AND DISCONNECT ELECTRICAL CONNECTIONS

Next: !p391, !f392

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR CN7 FROM THE PCB
DISCONNECT AC CONNECTOR (3 WIRE) FROM THE FAN

Next: !p395, !f396

FURTHER INVESTIGATION FUSE MAINS

Next: !p41, !f42

OBSERVATION IS FAN RUNNING DHW DEMAND

GAIN ACCESS TO FAN

Next: p1344, f1347

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: !p470, ?471, ?473

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: !p541, ?542, ?544

OBSERVATION RESET APPLIANCE - OVERHEAT

ENSURE APPLIANCE IS COOL

Next: p685, f686

RESISTANCE SAFETY THERMOSTATS AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: !p687, f688

RESISTANCE LIMIT STAT

REMOVE THE LEADS FROM THE LIMIT STAT

Next: p689, !f690

VOLTAGE PUMP AT PCB

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p701, !f702

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: !p711, !f712

INSPECTION AIR/GAS HOSE

REMOVE THE AIR/GAS HOSE

Next: p1159, !f1167

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p1161, !f1168

INSPECTION BURNER

REMOVE THE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p1162, !f1163

INSPECTION FLUE

Next: !p1164, !f1165

RESISTANCE FAN HARNESS DC

REMOVE CONNECTOR CN3 FROM THE PCB
DISCONNECT DC CONNECTOR (4 WIRE) FROM THE FAN

Next: p1345, !f1346

VOLTAGE DC PERMANENT AT FAN

ENSURE NO DEMANDS

Next: p1352, !f1353

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR CN7 FROM THE PCB
DISCONNECT AC CONNECTOR (3 WIRE) FROM THE FAN

Next: p1350, !f1351

VOLTAGE DC PERMANENT AT FAN

ENSURE NO DEMANDS

Next: p1356, !f1357

VOLTAGE DC PWM DEMAND AT FAN

Next: !p1354, !f1355

VOLTAGE DC PWM DEMAND AT FAN

Next: !p1358, !f1359

RESISTANCE CH SENSOR AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p1372, !f1373

OBSERVATION PUMP RUNNING

Next: p1374, f1375

PUMP LIMPET TEST

Next: p1380, !f1381

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN6 FROM THE PCB
DISCONNECT THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p1378, !f1379

OBSERVATION PUMP OVERRUN

ENSURE CH CONTROLS ARE CALLING FOR HEAT

Next: p1382, !f1383

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: p1384, f1385

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: p1388, !f1389

OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

ATTACH A TEMPERATURE CLAMP TO FLOW PIPE AS INDICATED BY THE RED ARROW

Next: p2659, ?1392, ?1394

VOLTAGE DC PERMANENT AT FAN

ENSURE NO DEMANDS

Next: p150, !f151

RESISTANCE LIMIT STAT

REMOVE THE LEADS FROM THE LIMIT STAT

Next: p1931, !f1932

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN6 FROM THE PCB
DISCONNECT THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p160, !f161

VOLTAGE DC FAN DEMAND AT FAN (RUNNING CONTINUOUSLY)

ENSURE NO DEMANDS

Next: !p1306, !f1307

VOLTAGE AC PERMANENT TO FAN

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p1516, !f1517

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR CN7 FROM THE PCB
DISCONNECT AC CONNECTOR (3 WIRE) FROM THE FAN

Next: p1518, !f1519

RESISTANCE FAN HARNESS DC

REMOVE CONNECTOR CN3 FROM THE PCB
DISCONNECT DC CONNECTOR (4 WIRE) FROM THE FAN

Next: p1520, !f1521

VOLTAGE DC PERMANENT AT FAN

ENSURE NO DEMANDS

Next: p1522, !f1523

VOLTAGE DC PWM DEMAND AT FAN

Next: !p1577, f1578

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: p1900, f1901

INSPECTION CONDENSATE PIPE

Next: p1717, !f1736

COMBUSTION PERFORMANCE ANALYSIS

ACTIVATE CHIMNEY SWEEP FUNCTION

Next: p1790, f2478

RESISTANCE IGNITION ELECTRODE AND LEAD

ENSURE IGNITION ELECTRODE IS REMOVED FROM THE BURNER DOOR
DISCONNECT LEAD AT PCB

Next: p2416, !f2427

RESISTANCE IONISATION ELECTRODE AND LEAD

REMOVE IONISATION ELECTRODE FROM THE BURNER DOOR
DISCONNECT LEAD AT PCB

Next: p2429, !f2430

OBSERVATION COLD WATER SUPPLY PRESSURE

Next: p20, !f21

RESISTANCE SAFETY THERMOSTATS AND HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: !p1904, f1905

RESISTANCE SAFETY THERMOSTAT

REMOVE THE LEADS FROM THE SAFETY THERMOSTAT

Next: p1921, !f1922

RESISTANCE HARNESS FOR SAFETY THERMOSTATS

REMOVE CONNECTOR CN4 FROM THE PCB
DISCONNECT THE PLUG FROM THE THERMAL FUSE

Next: !p1923, !f1924

RESISTANCE SAFETY THERMOSTAT

REMOVE THE LEADS FROM THE SAFETY THERMOSTAT

Next: !p1933, !f1934

RESISTANCE SAFETY THERMOSTAT

REMOVE THE LEADS FROM THE SAFETY THERMOSTAT

Next: !p1938, !f1939

RESISTANCE WATER FLOW SWITCH AND HARNESS

REMOVE CONNECTOR CN4

Next: p1942, f1943

VOLTAGE AC PERMANENT TO FAN

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p1946, !f1947

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR CN7 FROM THE PCB
DISCONNECT AC CONNECTOR (3 WIRE) FROM THE FAN

Next: p1948, !f1949

RESISTANCE FAN HARNESS DC

REMOVE CONNECTOR CN3 FROM THE PCB
DISCONNECT DC CONNECTOR (4 WIRE) FROM THE FAN

Next: p1950, !f1951

VOLTAGE DC PERMANENT AT FAN

ENSURE NO DEMANDS

Next: p1952, !f1953

VOLTAGE DC PWM DEMAND AT FAN

Next: !p1954, f1955

RESISTANCE DHW SENSOR

REMOVE THE LEADS FROM THE DHW SENSOR

Next: !p1958, !f1959

INSPECTION WATER RATE ADJUSTER

ISOLATE COLD MAINS A

Next: p22, !f23

INSPECTION AIR/GAS MIXER ASSEMBLY

REMOVE THE FRONT PANEL FROM THE AIR/GAS MIXER ASSEMBLY

Next: p834, !f2023

RESET APPLIANCE - FAULT CODE

Next: !p2025, !f2026

RESET APPLIANCE - FAULT CODE

Next: !p2028, !f2029

RESET APPLIANCE - FAULT CODE

Next: !p2031, !f2032

BYPASS EXTERNAL CONTROLS

INSERT A WIRE LINK TO BYPASS THE EXTERNAL CONTROLS
(AS INDICATED BELOW BY THE RED WIRE LINK)

Next: !p2034, f2035

BYPASS EXTERNAL CONTROLS

INSERT A WIRE LINK TO BYPASS THE EXTERNAL CONTROLS
(AS INDICATED BELOW BY THE RED WIRE LINK)

Next: !p2039, f2040

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p466, !f2062

INSPECTION CONDENSATE PIPE

Next: p801, !f802

INSPECTION FLUE

Next: p513, !f2086

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: p234, !f2122

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: p464, !f2141

RESISTANCE DHW SENSOR

REMOVE THE LEADS FROM THE DHW SENSOR

Next: !p215, !f216

OBSERVATION SYSTEM PRESSURE RISE

Next: p2308, !f2339

OBSERVATION SYSTEM PRESSURE RISE

Next: p2276, !f2306

RESISTANCE DHW SENSOR

REMOVE THE LEADS FROM THE DHW SENSOR

Next: p2106, !f2121

INSPECTION WATER FLOW SWITCH ASSEMBLY

ISOLATE COLD MAINS AND DRAIN DHW CIRCUIT
REMOVE THE WATER FLOW SWITCH ASSEMBLY

Next: !p24, !f25

RESISTANCE DHW SENSOR

REMOVE THE LEADS FROM THE DHW SENSOR

Next: p2123, !f2140

OBSERVATION SYSTEM PRESSURE RISE

Next: p327, !f2218

OBSERVATION SYSTEM PRESSURE

Next: p2233, !f2247

OBSERVATION DIVERTER VALVE MOTOR SPINDLE DHW POSITION

REMOVE LOCKING PIN A

Next: !p228, f229

OBSERVATION SYSTEM PRESSURE RISE

Next: p2519, !f2545

PUMP LIMPET TEST

Next: p817, !f2263

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p695, !f2307

RESISTANCE HARNESS DIVERTER

REMOVE CONNECTOR CN7 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER MOTOR

Next: !p232, !f233

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p1370, !f2338

PUMP LIMPET TEST

Next: p439, !f440

OBSERVATION WHICH DEMAND IS ILLUMINATED

ENSURE NO DEMANDS

Next: p2359, f2360

ISOLATE COLD MAINS SUPPLY

ISOLATE THE COLD MAINS SUPPLY
(TURN THE LEVER 90° CLOCKWISE UNTIL IT IS HORIZONTAL)

Next: p2363, !f2364

RESISTANCE WATER FLOW SWITCH AND HARNESS

REMOVE CONNECTOR CN4

Next: !p2365, f2366

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p242, !f243

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: p883, !f887

INSPECTION EXPANSION VESSEL PRESSURE

DISCHARGE APPLIANCE PRIMARY WATER

Next: !p250, !f251

INSPECTION SPARK GAP

Next: p1791, !f2428

PUMP LIMPET TEST

Next: p244, !f245

RESISTANCE GAS VALVE

REMOVE THE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: p2431, !f2432

INSPECTION AIR/GAS HOSE

REMOVE THE AIR/GAS HOSE

Next: p2433, !f2434

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p2435, !f2448

INSPECTION SPARK GAP TO BURNER

REMOVE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p2436, !f2437

INSPECTION IONISATION GAP TO BURNER

REMOVE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p2438, !f2439

INSPECTION BURNER

REMOVE THE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p2440, !f2441

OBSERVATION DIVERTER VALVE MOTOR SPINDLE CH POSITION

REMOVE LOCKING PIN A

Next: p246, f247

INSPECTION AIR/GAS MIXER ASSEMBLY

REMOVE THE FRONT PANEL FROM THE AIR/GAS MIXER ASSEMBLY

Next: p2442, !f2443

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO THE MAIN HEAT EXCHANGER

Next: p2444, !f2445

INSPECTION FLUE

Next: p2655, !f2656

INSPECTION DIVERTER VALVE BODY

REMOVE LOCKING PIN A

Next: p266, !f1963

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p2481, !f2482

INSPECTION BURNER

REMOVE THE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p2483, !f2484

INSPECTION AIR/GAS MIXER ASSEMBLY

REMOVE THE FRONT PANEL FROM THE AIR/GAS MIXER ASSEMBLY

Next: p2485, !f2486

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO THE MAIN HEAT EXCHANGER

Next: p2487, !f2488

INSPECTION FLUE

Next: p2493, !f2495

OBSERVATION CAN COMBUSTION VALUES BE ADJUSTED

ACTIVATE CHIMNEY SWEEP FUNCTION
CONNECT FGA TO THE COMBUSTION TEST POINT ON THE BOILER

Next: !p2496, !f2497

OBSERVATION PUMP RUNNING

Next: p2249, f2540

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN6 FROM THE PCB
DISCONNECT THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p2543, !f2544

RESISTANCE HARNESS DIVERTER

REMOVE CONNECTOR CN7 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER MOTOR

Next: !p258, !f259

OBSERVATION SYSTEM PRESSURE RISE

Next: p2562, !f2563

RESISTANCE WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: p2643, f2565

RESISTANCE FAN HARNESS DC

REMOVE CONNECTOR CN3 FROM THE PCB
DISCONNECT DC CONNECTOR (4 WIRE) FROM THE FAN

Next: p2591, !f2592

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR CN7 FROM THE PCB
DISCONNECT AC CONNECTOR (3 WIRE) FROM THE FAN

Next: p2585, !f2586

VOLTAGE DC PERMANENT AT FAN

ENSURE NO DEMANDS

Next: p2587, !f2588

VOLTAGE DC PWM DEMAND AT FAN

Next: !p2589, !f2590

VOLTAGE DC PERMANENT AT FAN

ENSURE NO DEMANDS

Next: p2593, !f2594

VOLTAGE DC PWM DEMAND AT FAN

Next: p2650, !f2651

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2600, !f2601

ANTI FREEZE FROST PROTECTION - FLOW PIPE TEMPERATURE

PLACE A TEMPERATURE PROBE/CLAMP ON THE FLOW PIPE
ENSURE NO DEMANDS

Next: !p2613, f2614

OBSERVATION IS BURNER ALIGHT

Next: p2621, f2622

ANTI FREEZE FROST PROTECTION - FLOW PIPE TEMPERATURE

PLACE A TEMPERATURE PROBE/CLAMP ON THE FLOW PIPE
ENSURE NO DEMANDS

Next: !p2623, f2624

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2635, !f2636

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2641, !f2642

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2644, !f2645

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2647, !f2648

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2652, !f2653

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2657, !f2658

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2660, !f2661

INSPECTION EXTERNAL BYPASS

Next: !p1966, !f1967

OBSERVATION SYSTEM PRESSURE

Next: p2666, !f2667

OBSERVATION SYSTEM PRESSURE RISE

Next: p2668, !f2669

OBSERVATION PUMP RUNNING

Next: p2670, f2671

PUMP LIMPET TEST

Next: p2672, !f2673

TEMPERATURE FLUE GAS

PLACE TEMPERATURE PROBE IN THE FLUE SAMPLE TEST POINT

Next: p2674, !f2689

FURTHER INVESTIGATION AFTER USING FAULT CODE HISTORY

TESTS HAVE REVEALED

Next: !p2676, !f2677

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN6 FROM THE PCB
DISCONNECT THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p2682, !f2683

OBSERVATION IS SPARKING PRESENT

REMOVE IGNITION ELEC

Next: p2694, f2695

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2696, !f2740

INSPECTION CONDENSATE PIPE

Next: p2698, !f2739

PRESSURE FAN THROUGH IGNITION CYCLE

ATTACH A TUBE FROM THE + PORT ON THE TELEGAN TO THE FAN PRESSURE TEST POINT

Next: p2700, f2701

VOLTAGE GAS VALVE AT PCB

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p2702, !f2703

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR CN6 FROM THE PCB

Next: p2704, f2705

RESISTANCE IGNITION ELECTRODE AND LEAD

ENSURE IGNITION ELECTRODE IS REMOVED FROM THE BURNER DOOR
DISCONNECT LEAD AT PCB

Next: p2706, !f2707

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p2708, !f2709

INSPECTION AIR/GAS MIXER ASSEMBLY

REMOVE THE FRONT PANEL FROM THE AIR/GAS MIXER ASSEMBLY

Next: p2710, !f2711

INSPECTION BURNER

REMOVE THE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p2712, !f2713

INSPECTION SPARK GAP TO BURNER

REMOVE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p2714, !f2741

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO THE MAIN HEAT EXCHANGER

Next: p2716, !f2738

INSPECTION FLUE

Next: !p2718, !f2737

INSPECTION SPARK GAP

Next: !p2722, !f2723

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p2726, !f2727

INSPECTION AIR/GAS MIXER ASSEMBLY

REMOVE THE FRONT PANEL FROM THE AIR/GAS MIXER ASSEMBLY

Next: p2728, !f2729

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO THE MAIN HEAT EXCHANGER

Next: p2730, !f2731

INSPECTION FLUE

Next: !p2732, !f2733

INSPECTION AIR/GAS HOSE

REMOVE THE AIR/GAS HOSE

Next: p2744, !f2745

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p2746, !f2747

INSPECTION FLUE

Next: p2748, !f2749

INSPECTION BURNER

REMOVE THE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p2750, !f2751

INSPECTION AIR/GAS MIXER ASSEMBLY

REMOVE THE FRONT PANEL FROM THE AIR/GAS MIXER ASSEMBLY

Next: p2752, !f2753

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO THE MAIN HEAT EXCHANGER

Next: p2754, !f2755

OBSERVATION CAN COMBUSTION VALUES BE ADJUSTED

ACTIVATE CHIMNEY SWEEP FUNCTION
CONNECT FGA TO THE COMBUSTION TEST POINT ON THE BOILER

Next: p2756, !f2757

COMBUSTION VALUES CORRECTLY ADJUSTED

THE COMBUSTION READI

Next: !p2758, !f2759

RESISTANCE FAN HARNESS DC

REMOVE CONNECTOR CN3 FROM THE PCB
DISCONNECT DC CONNECTOR (4 WIRE) FROM THE FAN

Next: p139, !f140

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p288, !f291

INSPECTION AIR/GAS HOSE

REMOVE THE AIR/GAS HOSE

Next: p289, !f290

INSPECTION CONDENSATE PIPE

Next: p292, !f293

OBSERVATION DOES FAN RUN DHW DEMAND

Next: p31, f32

INSPECTION AIR INTAKE PIPE

REMOVE THE AIR INTAKE PIPE

Next: p2078, !f2085

INSPECTION AIR/GAS MIXER ASSEMBLY

REMOVE THE FRONT PANEL FROM THE AIR/GAS MIXER ASSEMBLY

Next: p518, !f523

FURTHER INVESTIGATION BLANK DISPLAY

Next: !p33, !f1968

RESISTANCE WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: !p329, f338

RESISTANCE DIVERTER VALVE MOTOR AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN7 FROM THE PCB

Next: p385, f386

RESISTANCE PUMP AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN6 FROM THE PCB

Next: p389, f390

RESISTANCE FAN AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN7 FROM THE PCB

Next: p393, f394

RESISTANCE GAS VALVE AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN6 FROM THE PCB

Next: !p1969, f1970

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: !p539, f540

PUMP LIMPET TEST

Next: p2048, !f2061

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: !p468, f469

OBSERVATION MAXIMUM HEATING POWER

ENSURE NO DEMANDS

Next: !p492, !f493

VOLTAGE MAINS INPUT TO APPLIANCE

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p29, f30

INSPECTION BURNER

REMOVE THE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p294, !f517

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO THE MAIN HEAT EXCHANGER

Next: !p2088, !f2089

OBSERVATION SYSTEM PRESSURE

Next: p2174, !f2205

RESISTANCE SAFETY THERMOSTAT

REMOVE THE LEADS FROM THE SAFETY THERMOSTAT

Next: p691, !f692

RESISTANCE HARNESS FOR SAFETY THERMOSTATS

REMOVE CONNECTOR CN4 FROM THE PCB
DISCONNECT THE PLUG FROM THE THERMAL FUSE

Next: !p1889, !f1890

RESISTANCE CH SENSOR

REMOVE THE LEADS FROM THE CH SENSOR

Next: p697, !f698

OBSERVATION PUMP RUNNING

Next: p699, f700

PUMP LIMPET TEST

Next: p705, !f706

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN6 FROM THE PCB
DISCONNECT THE CONNECTION FROM THE PUMP ASSEMBLY

Next: !p703, !f704

OBSERVATION PUMP OVERRUN

ENSURE CH CONTROLS ARE CALLING FOR HEAT

Next: p707, !f708

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: p709, f710

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

ATTACH TEMPERATURE PROBES/CLAMPS TO THE FLOW & RETURN PIPES
(AS INDICATED BY THE RED ARROWS)

Next: p713, !f714

OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

ATTACH A TEMPERATURE CLAMP TO FLOW PIPE AS INDICATED BY THE RED ARROW

Next: !p715, ?717, ?719

RESISTANCE LIMIT STAT

REMOVE THE LEADS FROM THE LIMIT STAT

Next: p1936, !f1937

OBSERVATION DOES THE BURNER IGNITE AND ESTABLISH

Next: !p855, !f856

OBSERVATION CAN APPLIANCE BE TAKEN OUT OF STANDBY ?

Next: !p740, !f741

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p864, !f874

INSPECTION AIR/GAS HOSE

REMOVE THE AIR/GAS HOSE

Next: p805, !f806

RESISTANCE IONISATION ELECTRODE AND LEAD

REMOVE IONISATION ELECTRODE FROM THE BURNER DOOR
DISCONNECT LEAD AT PCB

Next: p2016, !f2022

TEMPERATURE FLUE GAS

PLACE TEMPERATURE PROBE IN THE FLUE SAMPLE TEST POINT

Next: !p819, f1148

INSPECTION BURNER

REMOVE THE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: p835, !f836

INSPECTION IONISATION GAP TO BURNER

REMOVE BURNER DOOR ASSEMBLY COMPLETE WITH BURNER

Next: !p837, !f838

OBSERVATION IS THE AIR/GAS HOSE FITTED ON CORRECT PORT

Next: p803, !f875

OBSERVATION MAXIMUM HEATING TEMPERATURE

ENSURE NO DEMANDS

Next: p490, !f888

FAULT CODES

Next: !p16, !f17

System Information

  • Total Tests: 687
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control