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:

4709476 VOKERA COMPACT 29 HE LPG

GLOBALLY REPLACED

Next: &3, *

NO FAULT FOUND

Next: nff

CASE REMOVAL

Next: &58, !f243

OBSERVATION STAND-BY MODE

SELECTOR SWITCH SET TO CH/DHW POSITION
ENSURE NO DEMANDS ARE PRESENT

Next: &212, ?61, ?163, ?237, ?3246

OBSERVATION DHW FLOW RATE

Next: &2739, f82

OBSERVATION DOES BURNER IGNITE AND ESTABLISH

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: &409, ?95, ?97, ?99, ?101, ?5294

OPERATION DHW

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: &4587, ?368, ?374, ?477, ?2670, ?2685

TYPE OF DIAGNOSTIC PROCEDURE

Next: &364, !f213

FUNCTIONAL SEQUENCE

NOT USED ANYMORE

Next: &81, !f365

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: &103, !f410

CH OPERATION

SELECTOR SWITCH SET

Next: &4626, ?454, ?456, ?3163

OBSERVATION PUMP OVER-RUN

SELECTOR SWITCH SET

Next: &nff, !f596

DHW MODULATION

SELECTOR SWITCH SET

Next: &1107, ?4994

JP2 LINK INFORMATION PAGE

Next: &nff, !f4779

OVERHEAT FURTHER INVESTIGATION

Next: &nff, f4065

FURTHER INVESTIGATION FUSE BLOWN

INTENTIONALLY BLANK

Next: &nff, f5025

TEMPORARY FAULT

INTENTIONALLY BLANK

Next: &nff, f5438

SARA FUNCTION INFORMATION PAGE

Next: &nff, !f4778

DHW THERMISTOR

INTENTIONALLY BLANK

Next: &nff, f1036

HEAT THERMISTOR/IGNITION LOCKOUT

INTENTIONALLY BLANK

Next: &nff, f3537

OBSERVATION DOES BOILER RESPOND TO A CH DEMAND

SELECTOR SWITCH SET

Next: &448, f3445

CH MODULATION

FOR TESTING PURPOSES

Next: &449, f1144

OBSERVATION FAN RUNNING DHW DEMAND

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX
GAIN ACCESS TO FAN

Next: &2982, ?4478

OBSERVATION PUMP RUNNING

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: &92, f4634

DHW BURNER PRESSURE MAX & MIN

SELECTOR SWITCH SET

Next: &809, f4588

OBSERVATION SYSTEM PRESSURE RISE

SELECTOR SWITCH SET

Next: &1143, f4631

CH MODULATION

SENSOR - NTC

Next: End

TYPE DIAGNOSTIC PROCEDURE

Z DIRECTION CHOICE OR CONTINUE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

SENSOR - NTC

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

SENSOR - NTC

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

HEAT EXCHANGER

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 1

ELECTRODE - SPARK (GAP)

Next: End

ENHANCED FAULT CODES 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 1

BURNER ASSEMBLY

Next: End

CO FUNCTION

PCB - CP04N

Next: End

CASE REMOVAL

Z DIRECTION CHOICE OR CONTINUE

Next: End

LED DOES NOT ILLUMINATE

FUSE F3 (FUSED SPUR)

Next: End

LED DOES NOT ILLUMINATE

FUSE F2

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

PUMP - CIRCULATION

Next: End

DHW RUNS HOT THEN COLD

PUMP - CIRCULATION

Next: End

LED DOES NOT ILLUMINATE 1

PCB - CP04N

Next: End

BURNER IGNITES BUT BAFFLES 1

HEAT EXCHANGER

Next: End

BURNER IGNITES BUT BAFFLES

BURNER ASSEMBLY

Next: End

BURNER IGNITES BUT BAFFLES

SIPHON AND/OR PIPEWORK

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

SENSOR - NTC

Next: End

DHW RUNS HOT THEN COLD

SENSOR - NTC

Next: End

LED DOES NOT ILLUMINATE

FUSE F1

Next: End

UNABLE TO SET UP MAX MIN BURNER PRESSURES 3

VALVE - GAS

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

GAS VALVE - ADJUSTMENT

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

GAS INLET PRESSURE

Next: End

BOILER NOISY (KETTLING)

SYSTEM PRESSURE AND AIR

Next: End

BURNER IGNITES BUT BAFFLES 1

CONDENSING UNIT ASSEMBLY

Next: End

BOILER TEMPERATURE LOW SYSTEM TEMPERATURE LOW

KNOB - CONTROL

Next: End

BOILER TEMPERATURE LOW SYSTEM TEMPERATURE LOW

SENSOR - NTC

Next: End

PUMP RUNNING CONTINUOUSLY

SENSOR - NTC

Next: End

DHW FLOW RATE

STOP COCK - WATER SUPPLY

Next: End

DHW FLOW RATE

COLD WATER SUPPLY

Next: End

DHW RUNS HOT THEN COLD 1

VALVE - BY-PASS - AUTO

Next: End

DHW RUNS HOT THEN COLD

VALVE - NON-RETURN

Next: End

DHW RUNS HOT THEN COLD

CONDENSING UNIT ASSEMBLY

Next: End

DHW RUNS HOT THEN COLD

VALVE - BY-PASS - AUTO

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND 1

VALVE - BY-PASS - AUTO

Next: End

DHW TOO COOL RADIATORS COOL WITH NO DEMAND

VALVE - NON-RETURN

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

CONDENSING UNIT ASSEMBLY

Next: End

DHW TOO COOL RADIATORS COOL WITH NO DEMAND

VALVE - BY-PASS - AUTO

Next: End

HEAT THERMISTOR FAULT CODE

SENSOR - NTC

Next: End

FUNCTIONAL SEQUENCE

Z DIRECTION CHOICE OR CONTINUE

Next: End

UNABLE TO SET UP MAX MIN BURNER PRESSURES 4

VALVE - GAS

Next: End

BURNER IGNITES BUT BAFFLES

GAS VALVE - ADJUSTMENT

Next: End

BURNER IGNITES BUT BAFFLES

GAS INLET PRESSURE

Next: End

OVERHEAT

THERMOSTAT - HIGH LIMIT

Next: End

OVERHEAT

SYSTEM PRESSURE AND AIR

Next: End

OVERHEAT

SENSOR - NTC

Next: End

GAS INLET PRESSURE MEASUREMENT

GAS INLET PRESSURE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 1

GAS INLET PRESSURE

Next: End

DHW TOO HOT

SENSOR - NTC

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

VALVE - GAS AND PCB - CP04N

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

PCB - CP04N

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

BURNER MANIFOLD

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

SIPHON AND/OR PIPEWORK

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

BURNER ASSEMBLY

Next: End

FAN DOES NOT RUN

SYSTEM PRESSURE

Next: End

FAN DOES NOT RUN

ACTUATOR - DHW

Next: End

FAN DOES NOT RUN

SWITCH - PRESSURE - DIFFERENTIAL

Next: End

FAN DOES NOT RUN

SWITCH - PRESSURE

Next: End

FAN DOES NOT RUN

SIPHON, PIPEWORK AND/OR IMPULSE TUBE

Next: End

FAN DOES NOT RUN

SENSOR - NTC

Next: End

FAN DOES NOT RUN

SENSOR - NTC

Next: End

FAN DOES NOT RUN

THERMOSTAT - HIGH LIMIT

Next: End

FAN DOES NOT RUN

CABLE - COMBUSTION FAN

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

SYSTEM PRESSURE

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

ACTUATOR - DHW

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

SWITCH - PRESSURE - DIFFERENTIAL

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

SWITCH - PRESSURE

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

SIPHON, PIPEWORK AND/OR IMPULSE TUBE

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

CABLE - COMBUSTION FAN

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

SENSOR - NTC

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

THERMOSTAT - HIGH LIMIT

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 1

VALVE - GAS

Next: End

DHW BURNER PRESSURE MAX & MIN

GAS VALVE - ADJUSTMENT

Next: End

UNABLE TO SET UP MAX MIN BURNER PRESSURES 6

VALVE - GAS

Next: End

DHW BURNER PRESSURE MAX MIN 2

GAS VALVE - ADJUSTMENT

Next: End

DHW BURNER PRESSURE MAX MIN 1

GAS VALVE - ADJUSTMENT

Next: End

EXCESSIVE SYSTEM PRESSURE

EXPANSION VESSEL 10 LITRE

Next: End

PUMP DOES NOT RUN

PCB - CP04N

Next: End

PUMP DOES NOT RUN

HARNESS

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

VALVE 22MM - HEATING

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

PCB - CP04N

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

HARNESS

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

CARTRIDGE - 3 WAY VALVE

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

VALVE - BY-PASS - AUTO

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

VALVE - NON-RETURN

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

PUMP - CIRCULATION

Next: End

PUMP DOES NOT RUN 1

PCB - CP04N

Next: End

PUMP DOES NOT RUN 1

HARNESS

Next: End

OVERHEAT

SENSOR - NTC

Next: End

OVERHEAT

PUMP - CIRCULATION

Next: End

DHW TOO COOL RADIATORS BEGIN TO HEAT WITH NO CH DEMAND

PCB - CP04N

Next: End

DHW TOO COOL RADIATORS BEGIN TO HEAT WITH NO CH DEMAND

HARNESS

Next: End

BURNER IGNITES BUT BAFFLES

CONDENSATE PIPEWORK

Next: End

SARA FUNCTION INFO PAGE

Z DIRECTION CHOICE OR CONTINUE

Next: End

JP2 LINK INFO PAGE

Z DIRECTION CHOICE OR CONTINUE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

SOLENOID - GAS VALVE

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

BURNER MANIFOLD

Next: End

BOILER NOISY (KETTLING)

PUMP - CIRCULATION

Next: End

BOILER FIRES WITH NO DEMAND 1

ACTUATOR - DHW

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY 1

SENSOR - NTC

Next: End

BOILER FIRES WITH NO DEMAND

DHW SYSTEM

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

SOLENOID - GAS VALVE

Next: End

MAX VOLTAGE TO MODUREG

PCB - CP04N

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND 1

SOLENOID - GAS VALVE

Next: End

MAX VOLTAGE TO MODUREG 1

PCB - CP04N

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY 1

SENSOR - NTC

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

KNOB - CONTROL

Next: End

PUMP DOES NOT RUN CH DEMAND 4

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 6

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 8

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 1

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 2

TIMER

Next: End

BURNER IGNITES BUT BAFFLES

CLAMP - TUBE

Next: End

BURNER IGNITES BUT BAFFLES

FLUE

Next: End

DHW MODULATION

SENSOR - NTC

Next: End

BOILER FIRES WITH NO DEMAND 1

DHW SYSTEM

Next: End

BOILER FIRES WITH NO DEMAND

ACTUATOR - DHW

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY

SENSOR - NTC

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY

SENSOR - NTC

Next: End

FUSE BLOWN

VALVE - MOTORIZED

Next: End

FUSE FURTHER INVESTIGATIONDIVERTER VALVE COMPONENTS

DIVERTER VALVE - FUSE FURTHER INVESTIGATION

Next: End

FUSE BLOWN

PUMP - CIRCULATION

Next: End

FUSE BLOWN

FAN

Next: End

FUSE BLOWN

VALVE - GAS

Next: End

FUSE BLOWN

SOLENOID - GAS VALVE

Next: End

PUMP DOES NOT RUN CH DEMAND

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 3

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 5

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 7

TIMER

Next: End

PUMP DOES NOT RUN CH DEMAND 9

TIMER

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 2

ELECTRODE - SPARK

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH1

ELECTRODE - SPARK (GAP)

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

ELECTRODE - SPARK

Next: End

PUMP OVER-RUN 1

PCB - CP04N

Next: End

OVERHEAT

Next: End

OVERHEAT

VALVE - BY-PASS - AUTO

Next: End

OVERHEAT

CONDENSING UNIT ASSEMBLY

Next: End

OVERHEAT

VALVE - NON-RETURN

Next: End

BURNER DROPS OUT

SWITCH - PRESSURE - DIFFERENTIAL TUBES

Next: End

BURNER DROPS OUT

SWITCH - PRESSURE - DIFFERENTIAL

Next: End

BURNER DROPS OUT

SIPHON AND/OR PIPEWORK

Next: End

BURNER DROPS OUT

HEAT EXCHANGER

Next: End

BURNER DROPS OUT

CONDENSING UNIT ASSEMBLY

Next: End

BURNER DROPS OUT

FLUE

Next: End

BURNER DROPPING OUT

PCB - CP04N

Next: End

TEMPORARY FAULT

SYSTEM PRESSURE

Next: End

TEMPORARY FAULT

SWITCH - PRESSURE (TEMPORARY FAULT)

Next: End

TEMPORARY FAULT

SWITCH - PRESSURE (TEMPORARY FAULT)

Next: End

DHW RUNS HOT COLD

SENSOR - NTC

Next: End

DHW COOL RADS COOL

SENSOR - NTC

Next: End

SPARKING DOES NOT OCCUR

MODULE - IGNITION MISSING OR FITTED INCORRECTLY

Next: End

SPARKING DOES NOT OCCUR

MODULE - IGNITION

Next: End

SPARKING DOES NOT OCCUR 1

PCB - CP04N

Next: End

SPARKING DOES NOT OCCUR 1

MODULE - IGNITION

Next: End

SPARKING DOES NOT OCCUR

ELECTRODE - SPARK (GAP)

Next: End

SPARKING DOES NOT OCCUR 1

ELECTRODE - SPARK

Next: End

SPARKING DOES NOT OCCUR 2

PCB - CP04N

Next: End

SPARKING DOES NOT OCCUR 1

FAN VENTURI

Next: End

SPARKING DOES NOT OCCUR 1

SWITCH - PRESSURE - DIFFERENTIAL TUBES

Next: End

SPARKING DOES NOT OCCUR 1

SWITCH - PRESSURE - DIFFERENTIAL

Next: End

SPARKING DOES NOT OCCUR

SIPHON AND/OR PIPEWORK

Next: End

SPARKING DOES NOT OCCUR 1

HEAT EXCHANGER

Next: End

SPARKING DOES NOT OCCUR 1

CONDENSING UNIT ASSEMBLY

Next: End

SPARKING DOES NOT OCCUR 1

FLUE

Next: End

SPARKING DOES NOT OCCUR

HARNESS

Next: End

SOLID RED LOCKOUT

SYSTEM PRESSURE

Next: End

SOLID RED LOCKOUT

SWITCH - PRESSURE (TEMPORARY FAULT)

Next: End

SOLID RED LOCKOUT

SWITCH - PRESSURE (TEMPORARY FAULT)

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED 1

HARNESS

Next: End

DHW THERMISTOR FAULT CODE

HARNESS

Next: End

TEMPORARY FAULT

THERMOSTAT - HIGH LIMIT

Next: End

PUMP OVER-RUN

PCB - CP04N

Next: End

CH NOISY OPERATION

VALVE 22MM - HEATING

Next: End

CH NOISY OPERATION

PUMP - CIRCULATION

Next: End

CH NOISY OPERATION

SENSOR - NTC

Next: End

CH NOISY OPERATION

VALVE - BY-PASS - AUTO

Next: End

CH NOISY OPERATION

SYSTEM PRESSURE

Next: End

DHW FLOW RATE

GOVERNOR - FLOW

Next: End

DHW FLOW RATE

ACTUATOR - DHW

Next: End

DHW THERMISTOR FAULT CODE

PCB - CP04N

Next: End

CH MODULATION

PCB - CP04N

Next: End

CO FUNCTION RESET

Z DIRECTION CHOICE OR CONTINUE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 3

MODULE - IGNITION

Next: End

ENHANCED FAULT CODES 1

Z DIRECTION CHOICE OR CONTINUE

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 1

BURNER MANIFOLD

Next: End

LED DOES NOT ILLUMINATE

Next: End

FURTHER INVESTIGATION F3

Z DIRECTION CHOICE OR CONTINUE

Next: End

LED DOES NOT ILLUMINATE

HARNESS-WIRING

Next: End

FURTHER INVESTIGATION F2

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION LED PROBLEM

Z DIRECTION CHOICE OR CONTINUE

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY

TIMER

Next: End

LED DOES NOT ILLUMINATE

Z DIRECTION CHOICE OR CONTINUE

Next: End

ANTI-FROST PROTECTION

ANTI-FROST PROTECTION ACTIVATED

Next: End

DHW BURNER PRESSURE MAX MIN 3

Z DIRECTION CHOICE OR CONTINUE

Next: End

BOILER TEMPERATURE LOW SYSTEM TEMPERATURE LOW

PCB - CP04N

Next: End

PUMP RUNNING CONTINUOUSLY

PCB - CP04N

Next: End

PUMP RUNNING CONTINUOUSLY

HARNESS

Next: End

DHW RUNS HOT THEN COLD

PCB - CP04N

Next: End

DHW RUNS HOT THEN COLD

HEAT EXCHANGER - SPECIAL - DHW

Next: End

DHW RUNS HOT THEN COLD

HEAT EXCHANGER

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

PCB - CP04N

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

HEAT EXCHANGER - SPECIAL - DHW

Next: End

DHW TOO COOL RADIATORS COOL WITH NO DEMAND

HEAT EXCHANGER

Next: End

HEAT THERMISTOR FAULT CODE

HARNESS

Next: End

DHW BURNER PRESSURE MAX MIN 4

Z DIRECTION CHOICE OR CONTINUE

Next: End

OVERHEAT 1

PCB - CP04N

Next: End

OVERHEAT 2

HARNESS

Next: End

DHW TOO HOT

PCB - CP04N

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

HARNESS

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

HARNESS & MODULE - IGNITION

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 2

VALVE - GAS

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 1

MODULE - IGNITION

Next: End

FAN DOES NOT RUN

HARNESS

Next: End

FAN DOES NOT RUN 2

HARNESS

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED 6

HARNESS

Next: End

FAN DOES NOT RUN

SWITCH - PRESSURE

Next: End

FAN DOES NOT RUN

PCB - CP04N

Next: End

FAN DOES NOT RUN 4

HARNESS

Next: End

FAN DOES NOT RUN

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAN DOES NOT RUN

FAN

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED 4

HARNESS

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED 2

HARNESS

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED 5

HARNESS

Next: End

FAN DOES NOT RUN LED NOT ILUMINATED

SWITCH - PRESSURE

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

FAN

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

HARNESS

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED 3

HARNESS

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

Z DIRECTION CHOICE OR CONTINUE

Next: End

LED DOES NOT ILLUMINATE

PCB - CP04N

Next: End

SPARKING OCCURS BUT BURNER DOES NOT IGNITE 3

HARNESS

Next: End

DHW BURNER PRESSURE MAX & MIN

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW BURNER PRESSURE MAX MIN 6

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW BURNER PRESSURE MAX MIN 5

Z DIRECTION CHOICE OR CONTINUE

Next: End

EXCESSIVE SYSTEM PRESSURE

PIPE - FLEXIBLE

Next: End

PUMP DOES NOT RUN

PUMP - CIRCULATION

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

VALVE - MOTORIZED

Next: End

BOILER REACHES TEMPERATURE RADIATORS COLD

Next: End

PUMP DOES NOT RUN 1

PUMP - CIRCULATION

Next: End

OVERHEAT 2

PCB - CP04N

Next: End

OVERHEAT 1

THERMOSTAT - HIGH LIMIT

Next: End

OVERHEAT

NORMAL OPERATION

Next: End

DHW TOO COOL RADIATORS BEGIN TO HEAT WITH NO CH DEMAND

CARTRIDGE - 3 WAY VALVE

Next: End

DHW TOO COOL RADIATORS BEGIN TO HEAT WITH NO CH DEMAND

VALVE - MOTORIZED

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY 2

HARNESS

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY 2

PCB - CP04N

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY 3

HARNESS

Next: End

UNABLE TO SET UP MINIMUM

VALVE - GAS

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND

HARNESS

Next: End

FAULTY MAX ADJUSTMENT

VALVE - GAS

Next: End

UNABLE TO SET UP MINIMUM 1

VALVE - GAS

Next: End

DHW TOO COOL RADIATORS COOL WITH NO CH DEMAND 1

HARNESS

Next: End

FAULTY MAX ADJUSTMENT 1

VALVE - GAS

Next: End

PUMP DOES NOT RUN CH DEMAND 2

Next: End

PUMP DOES NOT RUN CH DEMAND 6

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 5

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND 3

Next: End

PUMP DOES NOT RUN CH DEMAND 8

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 6

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND 4

Next: End

PUMP DOES NOT RUN CH DEMAND 10

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 7

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND

Next: End

PUMP DOES NOT RUN CH DEMAND 2

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 8

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND 1

Next: End

PUMP DOES NOT RUN CH DEMAND 3

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 9

HARNESS

Next: End

BURNER IGNITES BUT BAFFLES 1

WASHER 0.60

Next: End

DHW MODULATION

PCB - CP04N

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY 1

HARNESS

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY 1

PCB - CP04N

Next: End

BOILER FIRES WITH NO DEMAND OR PUMP RUNNING CONTINUOUSLY

HARNESS

Next: End

FUSE BLOWN 1

HARNESS

Next: End

FUSE BLOWN 4

HARNESS

Next: End

FUSE BLOWN

CABLE - COMBUSTION FAN

Next: End

FUSE BLOWN 3

HARNESS

Next: End

FUSE BLOWN

HARNESS

Next: End

FURTHER INVESTIGATION FUSE BLOWN

PCB - CP04N (FUSE BLOWN)

Next: End

PUMP DOES NOT RUN CH DEMAND 1

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND 4

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 1

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND 5

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 2

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND 7

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 3

HARNESS

Next: End

PUMP DOES NOT RUN CH DEMAND 9

PCB - CP04N

Next: End

PUMP DOES NOT RUN CH DEMAND 4

HARNESS

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

MODULE - IGNITION

Next: End

BURNER IGNITES BUT DOES NOT ESTBALISH 4

PCB - CP04N

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 1

TRANSFORMER - IGNITION

Next: End

OVERHEAT

HEAT EXCHANGER - SPECIAL - DHW

Next: End

OVERHEAT

HEAT EXCHANGER

Next: End

HEAT THERMISTOR/IGNITION LOCKOUT

Z DIRECTION CHOICE OR CONTINUE

Next: End

TEMPORARY FAULT

HARNESS

Next: End

SPARKING DOES NOT OCCUR

PCB - CP04N

Next: End

SPARKING DOES NOT OCCUR

TRANSFORMER - IGNITION

Next: End

SPARKING DOES NOT OCCUR 1

FAN

Next: End

SPARKING DOES NOT OCCUR 3

PCB - CP04N

Next: End

BURNER DROPS OUT

MODULE - IGNITION

Next: End

SOLID RED LOCKOUT

PCB - CP04N

Next: End

SOLID RED LOCKOUT - CONDENSE SWITCH / LWPS

HARNESS

Next: End

BURNER DROPS OUT

FAN VENTURI

Next: End

BURNER DROPS OUT

FAN

Next: End

FAN DOES NOT RUN LED NOT ILLUMINATED

SENSOR - NTC

Next: End

DHW THERMISTOR FAULT CODE

SENSOR - NTC

Next: End

TEMPORARY FAULT

PCB - CP04N

Next: End

TEMP FAULT

HARNESS

Next: End

BOILER NOISY (KETTLING)

HEAT EXCHANGER

Next: End

CH NOISY OPERATION

Next: End

DHW FLOW RATE

HEAT EXCHANGER - SPECIAL - DHW

Next: End

NOISY OPERATION

PCB - CP04N

Next: End

BOILER NOISY (KETTLING)

HEAT EXCHANGER - SPECIAL - DHW

Next: End

CH NOISY OPERATION

HEAT EXCHANGER

Next: End

BURNER IGNITES BUT BAFFLES

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p102

LED DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM OBSERVATION STAND-BY MODE

Next: p254

FAULT CODE LED DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION STAND-BY MODE

Next: p239

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p2967

DHW TOO COOL, RADIATORS COOL WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p4862

BOILER TEMPERATURE LOW SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: p3215

PUMP RUNNING CONTINUOUSLY

CHARACTERISTIC TEST FROM OBSERVATION STAND-BY MODE

Next: p3247

BOILER DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION CH OPERATION FOR NOISE

Next: p3477

TEMPERATURE DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: p3495

BOILER DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION CH OPERATION FOR NOISE

Next: p3509

TEMPERATURE DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: p3522

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p369

DHW TOO COOL, RADIATORS BEGIN TO HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p375

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNNING DHW DEMAND

Next: p4480

BOILER REACHES TEMPERATURE RADIATORS COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p3194

NOISY OPERATION

CHARACTERISTIC TEST FROM CH OPERATION

Next: p457

BOILER OVERHEATS BEFORE 85°C IS REACHED

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: !p4696

BOILER REACHES TEMPERATURE AND SHUTS DOWN CORRECTLY

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: !p4698

BOILER DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION CH OPERATION FOR NOISE

Next: p4700

BOILER NOISY (KETTLING)

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p478

UNABLE TO SET MINIMUM

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: !p4829

UNABLE TO SET MAXIMUM

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: p4831

UNABLE TO SET MINIMUM

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: !p4842

UNABLE TO SET MAXIMUM

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: p4844

BURNER PRESSURE DOES NOT REDUCE

CHARACTERISTIC TEST FROM DHW MODULATION

Next: p4995

VOLTAGE STAYS AT 100 VOLTS AC ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION

Next: p5128

NO VOLTAGE PRESENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE RECTIFICATION

Next: p5125

BURNER IGNITES AND ESTABLISHES BUT DROPS OUT, ATTEMPS REIGNITION STRAIGHTAWAY

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p5370

VENTURIS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: !p5638

FAN UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION FAN AND VENTURIS

Next: !p5640

BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION STAND-BY MODE

Next: p62

BOILER STILL NOISY

CHARACTERISTIC TEST FROM OBSERVATION CH OPERATION FOR NOISE

Next: !p690

TEMPERATURE DIFFERENTIAL CORRECT SYSTEM NOISE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

Next: !p760

BOILER DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION CH OPERATION FOR NOISE

Next: p2728

TEMPERATURE DIFFERENTIAL CORRECT NOISE DUE TO EXCESSIVE HEAT

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

Next: !p945

SPARKING DOES NOT OCCUR

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p5540

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p98

BURNER IGNITES BUT DOES NOT ESTABLISH (SPARKING CONTINUES UNTIL LOCKOUT)

CHARACTERISTIC TEST FROM OBSERVATION DOES BURNER IGNITE AND ESTABLISH

Next: p100

29/03/2022 14:48:10 2203_1_50_1 26/08/2022 09:23:28

06/06/2022 13:10:56

Next: End

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p1037, f5644

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: !p1145, !f1146

VOLTAGE MAINS POWER INPUT TO APPLIANCE AT TERMINAL BLOCK

REMOVE CONTROL BOX COVER TO EXPOSE TERMINAL BLOCK

Next: p257, f258

RESISTANCE FUSE F3 (FUSED SPUR)

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p259, f260

FUSE FURTHER INVESTIGATION F3 (FUSED SPUR)

Next: !p261, !f262

FUSE FURTHER INVESTIGATION F2

Next: !p265, !f266

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p5108, f5109

DISCONNECT INTERNAL CLOCK

DISCONNECT THE WIRES AS INDICATED BY THE RED ARROWS AND MAKE SAFE

Next: !p2794, f4797

RESISTANCE FUSE F1

REMOVE THE FUSE FROM THE PCB

Next: p4529, f300

FUSE FURTHER INVESTIGATION F1

Next: !p301, !f302

INSPECTION ARE EXTERNAL CONTROLS FITTED?

Next: p2782, f2792

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: !p3250, !f3251

INSPECTION ARE EXTERNAL CONTROLS FITTED?

Next: p3446, f3447

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p5098, f5099

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

SELECTOR SWITCH SET

Next: !p3471, ?3476, ?3488

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p5113, f5114

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

SELECTOR SWITCH SET

Next: !p3507, ?3508, ?3520

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p5118, f5119

RESET BOILER

Next: !p5388, f3539

RESISTANCE HEAT THERMISTOR AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p5627, f3541

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: !p3542, !f3543

SETTING UP MAX & MIN BURNER PRESSURES

SELECTOR SWITCH SET

Next: p3899, !f3900

HIGH LIMIT THERMOSTAT AND BOILER RESET

ENSURE APPLIANCE IS

Next: p4066, f4067

RESISTANCE HIGH LIMIT THERMOSTAT AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: !p4068, f4069

RESISTANCE HIGH LIMIT THERMOSTAT

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE THE LEADS FROM THE HIGH LIMIT THERMOSTAT

Next: !p4070, !f4071

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p4104, !f4105

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: !p4403, f4256

RESISTANCE GAS VALVE MAIN SOLENOID

DISCONNECT THE LEAD FROM THE GAS VALVE

Next: !p4286, !f4287

RESISTANCE GAS VALVE MODULATING SOLENOID

REMOVE THE LEADS FROM THE GAS VALVE MODULATING SOLENOID

Next: !p4271, !f4783

RESISTANCE GAS VALVE MAIN SOLENOID

DISCONNECT THE LEAD FROM THE GAS VALVE

Next: !p4585, !f4586

OBSERVATION SYSTEM PRESSURE

Next: p4483, !f4484

DHW FLOW SWITCH RESISTANCE

REMOVE BOTH LEADS FROM THE DHW FLOW SWITCH

Next: !p4487, !f4488

RESISTANCE AIR PRESSURE SWITCH (REST POSITION)

REMOVE THE LEADS FROM THE AIR PRESSURE SWITCH MAKING A NOTE OF THEIR POSITIONS

Next: !p4491, !f4492

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE THE LEADS FROM THE LOW WATER PRESSURE SWITCH

Next: p4495, !f4496

INSPECTION SIPHON AND PIPEWORK

Next: !p4499, !f4500

RESISTANCE HIGH LIMIT THERMOSTAT

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE THE LEADS FROM THE HIGH LIMIT THERMOSTAT

Next: !p4507, f4508

OVERHEAT FURTHER INVESTIGATION

Next: !p4509, !f4510

OBSERVATION SYSTEM PRESSURE

Next: p4532, !f4533

DHW FLOW SWITCH RESISTANCE

REMOVE BOTH LEADS FROM THE DHW FLOW SWITCH

Next: !p4536, !f4537

RESISTANCE AIR PRESSURE SWITCH (REST POSITION)

REMOVE THE LEADS FROM THE AIR PRESSURE SWITCH MAKING A NOTE OF THEIR POSITIONS

Next: !p4540, !f4541

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE THE LEADS FROM THE LOW WATER PRESSURE SWITCH

Next: p4544, !f4545

INSPECTION SIPHON AND PIPEWORK

Next: !p4548, !f4549

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: !p4567, !f4568

RESISTANCE HIGH LIMIT THERMOSTAT

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE THE LEADS FROM THE HIGH LIMIT THERMOSTAT

Next: !p4570, f4571

OVERHEAT FURTHER INVESTIGATION

Next: !p4572, !f4573

SETTING UP MAX & MIN BURNER PRESSURES

SELECTOR SWITCH SET

Next: p4589, ?4841, ?4843

SETTING UP MAX & MIN BURNER PRESSURES

SELECTOR SWITCH SET

Next: p4599, !f4600

SETTING UP MAX & MIN BURNER PRESSURES

SELECTOR SWITCH SET

Next: p4608, ?4828, ?4830

INSPECTION EXPANSION VESSEL PRESSURE

Next: !p4632, !f4633

VOLTAGE PUMP AT PCB

{USEINSMAT}
GAIN

Next: p4635, !f4636

VOLTAGE TO DIVERTER VALVE ACTUATOR (CH DEMAND)

{USEINSMAT}
GAIN

Next: p4670, !f4671

VOLTAGE PUMP AT PCB

{USEINSMAT}
GAIN

Next: p4683, !f4684

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p5103, f5104

VOLTAGE TO DIVERTER VALVE ACTUATOR (DHW DEMAND)

{USEINSMAT}
GAIN

Next: p472, !f473

ISOLATE COLD MAINS SUPPLY

Next: p4798, !f4811

RESISTANCE DHW FLOW SWITCH

REMOVE BOTH OF THE LEADS FROM THE DHW FLOW SWITCH

Next: !p4801, !f4802

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: !p4809, !f4810

RESISTANCE GAS VALVE MODULATING SOLENOID

REMOVE THE LEADS FROM THE GAS VALVE MODULATING SOLENOID

Next: !p4834, !f4835

RESISTANCE GAS VALVE MODULATING SOLENOID

REMOVE THE LEADS FROM THE GAS VALVE MODULATING SOLENOID

Next: !p4847, !f4848

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p4935, f4936

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p4937, !f4938

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p4944, f4945

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p4946, !f4947

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p4953, f4954

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p4955, !f4956

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p4962, f4963

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p4964, !f4965

RESISTANCE CLOCK INTERNAL AT CONNECTOR CN1

SELECTOR SWITCH SET

Next: !p4971, f4972

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p4973, !f4974

ISOLATE COLD MAINS SUPPLY

Next: p5013, !f5014

RESISTANCE DHW FLOW SWITCH

REMOVE BOTH OF THE LEADS FROM THE DHW FLOW SWITCH

Next: !p5017, !f5018

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: !p5023, !f5024

INSPECTION DIVERTER VALVE ACTUATOR - FUSE FURTHER INVESTIGATION

DISCONNECT THE ELECT

Next: p5048, !f5057

RESISTANCE DIVERTER ACTUATOR FOR FUSE INVESTIGATION

REMOVE ELECTRICAL CO

Next: !p5051, !f5052

RESISTANCE PUMP FOR FUSE INVESTIGATION

REMOVE PUMP COVER AND DISCONNECT ELECTRICAL CONNECTIONS

Next: !p5081, !f5082

RESISTANCE FAN FOR FUSE INVESTIGATION

REMOVE THE ELECTRICAL CONNECTIONS FROM THE FAN

Next: !p5085, !f5086

RESISTANCE GAS VALVE MAIN SOLENOID FOR FUSE INVESTIGATION

DISCONNECT THE LEAD FROM THE GAS VALVE

Next: !p5091, !f5092

RESISTANCE GAS VALVE MODULATING SOLENOID FOR FUSE INVESTIGATION

REMOVE THE LEADS FROM THE GAS VALVE MODULATING SOLENOID

Next: !p5094, !f5095

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p5100, !f5101

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p5105, !f5106

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p5110, !f5111

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p5115, !f5116

RESISTANCE CLOCK INTERNAL

GAIN ACCESS TO INTERNAL CLOCK
DISCONNECT THE TWO LEADS FROM THE MICROSWITCH
CLOCK SWITCHED ON

Next: !p5120, !f5121

INSPECTION SPARK GAP

GAIN ACCESS TO THE ELECTRODE

Next: p5131, !f5132

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

SELECTOR SWITCH SET

Next: !p5283, f5287

INSPECTION INTERNAL BY-PASS

ISOLATE FLOW AND RET

Next: p5288, !f5289

OBSERVATION SYSTEM PRESSURE

Next: p5439, !f5440

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE THE LEADS FROM THE LOW WATER PRESSURE SWITCH

Next: p5443, !f5444

RESISTANCE BETWEEN IGNITION PCB CONNECTING PINS

REMOVE THE IGNITION PCB

Next: !p5545, !f5546

VOLTAGE AT FAN (CONSTANT)

SELECTOR SWITCH SET

Next: p5571, !f5550

VOLTAGE AT PCB - APS

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: p5590, !f5589

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE THE LEADS FROM THE LOW WATER PRESSURE SWITCH

Next: p5632, !f5633

RESISTANCE HARNESS DHW THERMISTOR

REMOVE CONNECTOR CN9 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DHW THERMISTOR

Next: !p5642, !f5643

RESISTANCE HARNESS DHW THERMISTOR

REMOVE CONNECTOR CN9 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DHW THERMISTOR

Next: !p5645, !f5646

RESISTANCE HIGH LIMIT THERMOSTAT

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE THE LEADS FROM THE HIGH LIMIT THERMOSTAT

Next: !p5650, !f5651

ANTI-FROST PROTECTION (BELOW 5 DEGREES)

REMOVE RIGHT HAND SIDE PANEL
CONNECT A TEMPERATURE PROBE/CLAMP TO FLOW PIPE

Next: !p310, f311

INSPECTION ISOLATION VALVE HW

Next: p3263, !f3269

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p3121, !f3126

INSPECTION CONDENSATE PIPE

Next: p4295, !f4341

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO MAIN HEAT EXCHANGER

Next: p1002, !f2407

OBSERVATION SPARK GAP

BOILER DHW THERMOSTAT SET TO MAX
GAIN ACCESS TO THE ELECTRODE

Next: p1004, !f2408

INSPECTION BURNER

REMOVE BURNER ASSEMBLY

Next: !p2409, !f2410

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p3880, !f3904

FURTHER INVESTIGATION LED PROBLEM

Next: !p2778, !f2779

FAULT CODES

Next: !p240, !f241

VOLTAGE MAINS INPUT TO APPLIANCE

{USEINSMAT}
GAIN ACCESS TO PCB

Next: p280, f256

RESISTANCE FUSE F2

REMOVE THE FUSE FROM TERMINAL BLOCK CONNECTOR

Next: !p263, f264

PUMP LIMPET TEST

Next: p2688, !f2705

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

SELECTOR SWITCH SET

Next: p4593, f3470

PUMP LIMPET TEST

Next: p2691, !f2692

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

SELECTOR SWITCH SET

Next: p4603, f3506

INSPECTION ARE EXTERNAL CONTROLS FITTED?

Next: p2729, f2730

BYPASS EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: !p4930, f4934

DISCONNECT EXTERNAL CONTROLS

DISCONNECT THE WIRES AS INDICATED BY THE RED ARROWS AND MAKE SAFE

Next: !p5011, f5012

OBSERVATION DOES FAN RUN DHW DEMAND

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX
GAIN ACCESS TO FAN

Next: p1186, f298

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO MAIN HEAT EXCHANGER

Next: p2927, !f2928

INSPECTION BURNER

REMOVE BURNER ASSEMBLY

Next: p2929, !f2930

INSPECTION LATENT HEAT COLLECTOR

GAIN ACCESS TO THE L

Next: p2931, !f3157

INSPECTION FAN SEAL

GAIN ACCESS TO THE FAN ASSEMBLY

Next: p4982, !f4983

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p5491, !f2966

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p5453, !f2981

SETTING UP MAX & MIN BURNER PRESSURES

SELECTOR SWITCH SET

Next: p3122, !f3123

CORRECT ADJUSTMENT OF MAX & MIN BURNER PRESSURES

Next: !p3124, !f3125

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p4665, !f4666

INSPECTION CH TEMPERATURE CONTROL SPINDLE

GAIN ACCESS TO PCB

Next: p3216, !f3217

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: !p3218, !f3219

RESISTANCE HEAT THERMISTOR AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: !p3248, f3249

OBSERVATION COLD WATER SUPPLY PRESSURE

Next: p83, !f3270

BYPASS EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: !p4960, f4961

INSPECTION INTERNAL BY-PASS

ISOLATE FLOW AND RET

Next: !p3468, !f3469

INSPECTION ARE EXTERNAL CONTROLS FITTED?

Next: p3478, f3479

BYPASS EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: !p4942, f4943

INSPECTION INTERNAL BY-PASS

ISOLATE FLOW AND RET

Next: p3496, !f3501

INSPECTION NON-RETURN VALVE

ISOLATE FLOW AND RET

Next: p3497, !f3498

INSPECTION LATENT HEAT COLLECTOR INLET AND OUTLET

ISOLATE FLOW AND RET

Next: !p3499, !f3500

INSPECTION INTERNAL BY-PASS

ISOLATE FLOW AND RET

Next: !p3504, !f3505

INSPECTION ARE EXTERNAL CONTROLS FITTED?

Next: p3510, f3511

BYPASS EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: !p4951, f4952

INSPECTION INTERNAL BY-PASS

ISOLATE FLOW AND RET

Next: p3523, !f3528

INSPECTION NON-RETURN VALVE

ISOLATE FLOW AND RET

Next: p3524, !f3525

INSPECTION LATENT HEAT COLLECTOR INLET AND OUTLET

ISOLATE FLOW AND RET

Next: !p3526, !f3527

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p416, !f417

OBSERVATION DIVERTER VALVE ACTUATOR SPINDLE DHW POSITION

SELECTOR SWITCH SET

Next: !p470, f471

DHW BURNER PRESSURE MAX & MIN

SELECTOR SWITCH SET

Next: p4761, f3898

CORRECT ADJUSTMENT OF MAX & MIN BURNER PRESSURES

Next: !p3901, !f3902

OBSERVATION SYSTEM PRESSURE AND AIR

Next: p4072, !f4073

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: p4074, !f4075

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4681, !f4687

VOLTAGE GAS VALVE AT PCB

{USEINSMAT}
GAIN

Next: p4247, f4254

RESISTANCE MODULATING SOLENOID AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4261, f4268

VOLTAGE AT GAS VALVE MODULATING SOLENOID

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: p4278, !f4292

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: !p4291, f4288

INSPECTION BURNER

REMOVE BURNER ASSEMBLY

Next: p4318, !f4342

INSPECTION BURNER MANIFOLD

REMOVE BURNER ASSEMBLY AND BURNER MANIFOLD

Next: p984, !f4340

VOLTAGE FAN AT PCB

{USEINSMAT}
GAIN

Next: p4481, f4482

VOLTAGE AT FAN

SELECTOR SWITCH SET

Next: !p4511, !f4512

DHW FLOW SWITCH AND HARNESS RESISTANCE

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4485, f4486

RESISTANCE AIR PRESSURE SWITCH AND HARNESS (REST POSITION)

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p4489, f4490

RESISTANCE LOW WATER PRESSURE & CONDENSE SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4493, f4494

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4501, !f4502

RESISTANCE CONDENSE PRESSURE SWITCH

DISCONNECT THE WIRES FROM THE CONDENSE PRESSURE SWITCH

Next: !p4497, f4498

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: p4503, !f4504

RESISTANCE HIGH LIMIT THERMOSTAT AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: !p4505, f4506

VOLTAGE FAN AT PCB

{USEINSMAT}
GAIN

Next: p4530, f4531

VOLTAGE AT FAN

SELECTOR SWITCH SET

Next: !p4560, !f4561

DHW FLOW SWITCH AND HARNESS RESISTANCE

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4534, f4535

RESISTANCE AIR PRESSURE SWITCH AND HARNESS (REST POSITION)

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p4538, f4539

RESISTANCE LOW WATER PRESSURE & CONDENSE SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4542, f4543

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4550, f5641

RESISTANCE CONDENSE PRESSURE SWITCH

DISCONNECT THE WIRES FROM THE CONDENSE PRESSURE SWITCH

Next: !p4546, f4547

RESISTANCE HEAT THERMISTOR AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p4552, f4566

RESISTANCE HIGH LIMIT THERMOSTAT AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: !p4574, f4569

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p674, !f738

MAX & MIN BURNER PRESSURES CORRECTLY ADJUSTED

Next: !p4591, !f4592

DHW BURNER PRESSURE MAX & MIN

SELECTOR SWITCH SET

Next: p3467, f4598

MAX & MIN BURNER PRESSURES CORRECTLY ADJUSTED

Next: !p4601, !f4602

DHW BURNER PRESSURE MAX & MIN

SELECTOR SWITCH SET

Next: p4792, f4607

MAX & MIN BURNER PRESSURES CORRECTLY ADJUSTED

Next: !p4610, !f4611

VOLTAGE AT PUMP

SELECTOR SWITCH SET TO CH/DHW
BOILER DHW THERMOSTAT SET TO MAX
REMOVE PUMP COVER

Next: !p4637, !f4638

PUMP LIMPET TEST

Next: p4667, !f4680

OBSERVATION DIVERTER VALVE ACTUATOR SPINDLE CH POSITION

SELECTOR SWITCH SET

Next: p4668, f4669

INSPECTION DIVERTER VALVE BODY

REMOVE LOCKING PIN A

Next: p4674, !f4675

RESISTANCE DIVERTER VALVE HARNESS

REMOVE CONNECTOR CN3 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p4672, !f4673

INSPECTION INTERNAL BY-PASS

ISOLATE FLOW AND RET

Next: p4676, !f4677

INSPECTION NON-RETURN VALVE

ISOLATE FLOW AND RET

Next: !p4678, !f4679

OBSERVATION PUMP RUNNING

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: p4688, f4682

VOLTAGE AT PUMP

SELECTOR SWITCH SET TO CH/DHW
BOILER DHW THERMOSTAT SET TO MAX
REMOVE PUMP COVER

Next: !p4685, !f4686

PUMP LIMPET TEST

Next: p4689, !f4690

OBSERVATION PUMP OVER-RUN

SELECTOR SWITCH SET

Next: p5238, !f5259

OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

SELECTOR SWITCH SET

Next: !p4693, ?4695, ?4697, ?4699

INSPECTION ARE EXTERNAL CONTROLS FITTED?

Next: p4701, f4702

BYPASS EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: !p4969, f4970

RESISTANCE DIVERTER VALVE HARNESS

REMOVE CONNECTOR CN3 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p474, !f475

INSPECTION CONDENSATE PIPEWORK (BEFORE SIPHON)

REMOVE LEFT HAND SIDE PANEL

Next: p774, !f4777

PUMP LIMPET TEST

Next: p479, !f480

OBSERVATION SYSTEM PRESSURE AND AIR

Next: p481, !f3147

INSPECTION BURNER MANIFOLD

REMOVE BURNER ASSEMBLY AND BURNER MANIFOLD

Next: p3503, !f4796

RESISTANCE DHW FLOW SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4799, f4800

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4803, !f4916

RESISTANCE HEAT THERMISTOR AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: !p4807, f4808

OBSERVATION CH OPERATION FOR NOISE

SELECTOR SWITCH SET

Next: !p975, ?689, ?934

RESISTANCE MODULATING SOLENOID AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4832, f4833

VOLTAGE AT GAS VALVE MODULATING SOLENOID (MAX)

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: !p4838, !f4839

RESISTANCE MODULATING SOLENOID AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p4845, f4846

VOLTAGE AT GAS VALVE MODULATING SOLENOID (MAX)

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: !p4849, !f4850

INSPECTION DHW TEMPERATURE CONTROL SPINDLE

GAIN ACCESS TO PCB

Next: p2952, !f4918

INSPECTION FLUE

Next: !p4984, !f4985

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p4996, !f4997

RESISTANCE DHW FLOW SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p5015, f5016

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p5019, !f5020

RESISTANCE HEAT THERMISTOR AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: !p5021, f5022

RESISTANCE DIVERTER VALVE AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN3 FROM THE PCB

Next: p5078, f5050

RESISTANCE PUMP AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN2 FROM THE PCB

Next: p5079, f5080

RESISTANCE FAN AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p5088, f5084

RESISTANCE GAS VALVE AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN5 FROM THE PCB

Next: p5089, f5090

RESISTANCE MODULATING SOLENOID AND HARNESS FOR FUSE INVESTIGATION

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p5096, f5093

RESISTANCE TO EARTH TEST (ELECTRODE)

GAIN ACCESS TO SPARK ELECTRODE
REMOVE CONNECTOR CN6 FROM THE PCB

Next: !p5126, !f5127

RESISTANCE IGNITION TRANSFORMER (FLAME SENSE)

REMOVE CONNECTOR CN6 FROM THE PCB

Next: !p5129, f5130

RESISTANCE ELECTRODE AND HARNESS

Next: !p5133, !f5134

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

SELECTOR SWITCH SET

Next: p5260, f5281

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

SELECTOR SWITCH SET

Next: p4691, !f5282

INSPECTION NON-RETURN VALVE

ISOLATE FLOW AND RET

Next: p5290, !f5293

INSPECTION LATENT HEAT COLLECTOR INLET AND OUTLET

ISOLATE FLOW AND RET

Next: !p5291, !f5292

INSPECTION FAN AND VENTURIS

REMOVE FAN AND THE FAN VENTURI (LOCATED IN FAN OUTLET)

Next: p5297, ?5637, ?5639

INSPECTION AIR PRESSURE SWITCH TUBES

REMOVE AIR PRESSURE SWITCH TUBES

Next: p5299, !f5300

AIR PRESSURE SWITCH PROVING

DISCONNECT LEADS FRO

Next: p5301, !f5302

INSPECTION CONDENSATE PIPE

Next: p5303, !f5304

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO MAIN HEAT EXCHANGER

Next: p5305, !f5306

INSPECTION LATENT HEAT COLLECTOR

GAIN ACCESS TO THE L

Next: p5307, !f5308

INSPECTION FLUE

Next: !p5617, !f5369

VOLTAGE AT FAN (CONSTANT)

SELECTOR SWITCH SET

Next: p5296, !f5386

RESISTANCE LOW WATER PRESSURE & CONDENSE SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p5647, f5442

RESISTANCE CONDENSE PRESSURE SWITCH

DISCONNECT THE WIRES FROM THE CONDENSE PRESSURE SWITCH

Next: !p5445, !f5446

RESISTANCE HEAT THERMISTOR AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p2687, !f5490

RESISTANCE HEAT THERMISTOR AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p2690, !f5539

OBSERVATION - IS IGNITION PCB FITTED ON TO THE MAIN PCB

GAIN ACCESS TO PCB

Next: p5541, !f5542

RESISTANCE BETWEEN IGNITION PCB AND MAIN PCB CONNECTING PINS

Next: p5543, f5544

VOLTAGE AT IGNITION PCB

{USEINSMAT}
GAIN

Next: p5547, f5548

VOLTAGE TO IGNITION TRANSFORMER

{USEINSMAT}
SELECTOR SWITCH SET TO CH/DHW POSITION

Next: p5565, !f5566

INSPECTION SPARK GAP

GAIN ACCESS TO THE ELECTRODE

Next: p5567, !f5568

RESISTANCE ELECTRODE AND HARNESS

Next: !p5569, !f5570

VOLTAGE AT PCB - APS PROVED

SELECTOR SWITCH SET TO CH/DHW POSITION
BOILER DHW THERMOSTAT SET TO MAX

Next: !p5605, f5587

INSPECTION FAN VENTURIS

REMOVE THE FAN AND VENTURIS

Next: p5591, !f5592

INSPECTION AIR PRESSURE SWITCH TUBES

REMOVE AIR PRESSURE SWITCH TUBES

Next: p5593, !f5594

AIR PRESSURE SWITCH PROVING

DISCONNECT LEADS FRO

Next: p5606, !f5596

INSPECTION CONDENSATE PIPE

Next: p5597, !f5598

INSPECTION MAIN HEAT EXCHANGER

GAIN ACCESS TO MAIN HEAT EXCHANGER

Next: p5599, !f5600

INSPECTION LATENT HEAT COLLECTOR

GAIN ACCESS TO THE L

Next: p5601, !f5602

INSPECTION FLUE

Next: !p5603, !f5604

RESISTANCE AIR PRESSURE SWITCH HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB
REMOVE THE LEADS FROM THE APS MAKING A NOTE OF THEIR POSITIONS

Next: p5595, !f5616

OBSERVATION SYSTEM PRESSURE

Next: p5628, !f5629

RESISTANCE LOW WATER PRESSURE & CONDENSE SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p5630, f5631

PUMP LIMPET TEST

Next: p741, !f742

RESISTANCE CONDENSE PRESSURE SWITCH

DISCONNECT THE WIRES FROM THE CONDENSE PRESSURE SWITCH

Next: !p5634, !f5635

RESISTANCE HIGH LIMIT THERMOSTAT AND HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: !p5648, f5649

OBSERVATION IS CO FUNCTION ACTIVE

SELECTOR SWITCH SET TO OFF/RESET POSITION

Next: p65, f66

CO FUNCTION RESET

REMOVE THE SELECTOR CONTROL KNOB

Next: !p2376, !f2425

OBSERVATION SYSTEM PRESSURE AND AIR

Next: p563, !f806

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: p743, !f754

INSPECTION INTERNAL BY-PASS

ISOLATE FLOW AND RET

Next: p752, !f755

TEMPERATURE DIFFERENTIAL MAIN HEAT EXCHANGER

SELECTOR SWITCH SET

Next: !p977, ?759, ?944

INSPECTION CONDENSATE PIPE

Next: p2926, !f2937

INSPECTION DHW FLOW LIMITER

ISOLATE COLD MAINS A

Next: p85, !f86

INSPECTION FLOW SWITCH ASSEMBLY

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

Next: !p88, !f89

BURNER PRESSURE

SELECTOR SWITCH SET

Next: p1001, f4103

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p985, !f2388

RESISTANCE HEAT THERMISTOR

REMOVE THE RIGHT HAND SIDE PANEL
REMOVE CONNECTOR FROM THE HEAT THERMISTOR

Next: p987, !f2389

BURNER PRESSURES

SELECTOR SWITCH SET

Next: p989, f990

VOLTAGE RECTIFICATION

{USEINSMAT}
GAIN

Next: !p2392, ?5122, ?5124

System Information

  • Total Tests: 650
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control