XSol Diagnostic System

VOKERA PRO COMBI A

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

INFORMATION CASE REMOVAL

Next: &2189, !f2

OBSERVATION BOILER SELF CHECK

SELECTOR SWITCH TO DHW & CH WITH NO PREHEAT
ENSURE NO DEMANDS AND THAT THE BOILER IS COOL

Next: &73, ?1009, ?1011, ?1013, ?2747

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &75, !f74

DHW FLOW RATE

Next: &89, f1041

OBSERVATION FAN RUNS

CH & DHW TEMPERATURE

Next: &103, f1053

OBSERVATION PUMP RUNS

Next: &216, f1187

OBSERVATION BURNER IGNITION & ESTABLISH

Next: &356, ?217, ?219, ?221, ?2850

PRESSURE GAS INLET (DHW DEMAND)

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: &763, !f357

CH OPERATION

Next: &2714, ?359, ?361, ?363, ?365

FUSE FURTHER INVESTIGATION

NOT USED

Next: &nff, f1608

DHW OPERATION

Next: &358, ?764, ?766, ?768, ?770

AL 20 26 28 74 79 (OVERHEAT / CIRCULATION FAULTS)

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f1729

AL 40 (SYSTEM PRESSURE FAULT) FINAL

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f1824

AL 60 (DHW THERMISTOR FAULT)

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f2426

INSPECTION CONTROL KNOB ALIGNMENT

{GAINPCBACS}
POSI

Next: &3, !f2190

AL 34 (FAN FAULT)

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f2380

AL 55 (JUMPER TAG FAULT)

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f2374

AL 52 (INTERNAL FAULT)

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f2377

AL 21 (EXTERNAL DEVICE FAULT)

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f2420

AL 73 RETURN THERMISTOR FAULT

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f2434

AL 71 PRIMARY (FLOW) THERMISTOR FAULT

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f2430

AL 41 (SYSTEM PRESSURE)

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f2442

INFORMATION MAXIMUM OUTPUT MODE

Next: &nff, !f2713

OBSERVATION PUMP OVERRUN

Next: &2716, !f2715

OPERATION PREHEAT

ENSURE APPLIANCE IS

Next: &nff, !f2717

CL AND ST INFORMATION

CL OR ST IS THE APPL

Next: &nff, !f2719

AIR PURGE CYCLE INFORMATION

SOME VERSIONS OF THE

Next: &nff, !f2949

DHW FLOW RATE

STOP COCK - WATER SUPPLY

Next: End

DHW FLOW RATE

COLD WATER SUPPLY

Next: End

FAN DOES NOT RUN

FAN

Next: End

FAN DOES NOT RUN

PRINTED CIRCUIT BOARD

Next: End

PUMP DOES NOT RUN

PRINTED CIRCUIT BOARD

Next: End

PUMP DOES NOT RUN

HARNESS - WIRING

Next: End

BURNER DOES NOT IGNITE

CONDENSATE

Next: End

BURNER DOES NOT IGNITE

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

MIXER

Next: End

BURNER DOES NOT IGNITE

COMPENSATION TUBE

Next: End

BURNER DOES NOT IGNITE 2

COMPENSATION TUBE

Next: End

BURNER DOES NOT IGNITE 2

MIXER

Next: End

BURNER DOES NOT IGNITE 2

HARNESS - WIRING

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

BOILER DOES NOT EST

CONDENSATE

Next: End

BOILER DOES NOT EST

COMPENSATION TUBE

Next: End

BOILER DOES NOT EST

GAS INLET PRESSURE

Next: End

BOILER DOES NOT EST

FLUE

Next: End

BURNER BAFFLES OR NOISY

CONDENSATE

Next: End

BURNER BAFFLES OR NOISY

COMPENSATION TUBE

Next: End

BURNER BAFFLES OR NOISY

FLUE

Next: End

BURNER BAFFLES OR NOISY

GAS INLET PRESSURE

Next: End

BURNER BAFFLES OR NOISY

MIXER

Next: End

DHW TOO HOT

SENSOR - NTC

Next: End

DHW HOT THEN COOL

PUMP

Next: End

DHW HOT THEN COOL

SENSOR - NTC

Next: End

DHW HOT THEN COOL

DETECTOR - WATER

Next: End

DHW HOT THEN COOL

VALVE - NON RETURN

Next: End

CH OPERATION

EXPANSION VESSEL

Next: End

CH OPERATION

VALVE 22MM - HEATING

Next: End

CH OPERATION

DETECTOR - WATER

Next: End

CH OPERATION 2

DETECTOR - WATER

Next: End

CH OPERATION 2

PUMP

Next: End

LEDS DO NOT WORK

FUSE (FUSED SPUR)

Next: End

LEDS DOT NOT WORK

MAINS INPUT FUSE

Next: End

LEDS DO NOT WORK

FUSE F1

Next: End

FUSE FURTHER INVESTIGATION

PUMP

Next: End

RESISTANCE SPARK GENERATOR

TRANSFORMER - IGNITION

Next: End

FUSE FURTHER INVESTIGATION

FAN

Next: End

FUSE FURTHER INVESTIGATION

VALVE - MOTORIZED

Next: End

FAULT CODE 2

Z REDIRECT

Next: End

FAULT CODE RED SOLID

THERMOSTAT - HIGH LIMIT

Next: End

FAN DOES NOT RUN 2

HARNESS - WIRING

Next: End

BURNER DOES NOT IGNITE

PRINTED CIRCUIT BOARD

Next: End

BURNER DOES NOT IGNITE

HARNESS - WIRING

Next: End

BOILER DOES NOT EST

MIXER

Next: End

CASE REMOVAL

Z REDIRECT

Next: End

LED DOES NOT WORK

FAN

Next: End

BOILER FIRES NO DEMAND

DETECTOR - WATER

Next: End

BOILER FIRES NO DEMAND

SENSOR - NTC

Next: End

BOILER FIRES NO DEMAND

Next: End

CONTROL KNOB ALIGNMENT

Next: End

BURNER DOES NOT IGNITE

SPARK - IGNITION - ELECTRODE

Next: End

RECTIFICATION SECTION

HARNESS - WIRING

Next: End

HIGH RESISTANCE OR DISTORTED

ELECTRODE - FLAME DETECTION

Next: End

RECTIFICATION SECTION 2

HARNESS - WIRING

Next: End

SHORTING TO EARTH

ELECTRODE - FLAME DETECTION

Next: End

EXTERNAL CONTROLS / TIMER SECTION

Next: End

NOT SWITCHING

TIMER

Next: End

NOT SWITCHING 2

TIMER

Next: End

NOT SWITCHING 2 DHW RUNS HOT AND COLD

TIMER

Next: End

EXTERNAL CONTROLS / TIMER SECTION DHW RUNS HOT AND COLD

Next: End

NOT SWITCHING DHW RUNS HOT AND COLD

TIMER

Next: End

OVERHEAT

DETECTOR - WATER

Next: End

OVERHEAT 2

DETECTOR - WATER

Next: End

OVERHEAT

SENSOR - NTC

Next: End

OVERHEAT 2

PRINTED CIRCUIT BOARD

Next: End

OVERHEAT 2

HARNESS - WIRING

Next: End

OVERHEAT 2

PUMP

Next: End

WRONG PLACES

JUMPER TAGS

Next: End

AL 52

PRINTED CIRCUIT BOARD

Next: End

FAN FAULT CODE

HARNESS - WIRING

Next: End

NO HALL SENSOR SIGNAL

FAN

Next: End

FAN DOES NOT RUN 5

PRINTED CIRCUIT BOARD

Next: End

FAN DOES NOT RUN 3

FAN

Next: End

AL 60

HARNESS - WIRING

Next: End

AL 71

DETECTOR - WATER

Next: End

AL 73

DETECTOR - WATER

Next: End

AL 40

PRINTED CIRCUIT BOARD

Next: End

NO SPARK

CABLE - SPARK

Next: End

NO LEDS / DISPLAY

FUSE F2

Next: End

TRIPPED

THERMOSTAT - HIGH LIMIT

Next: End

DHW RADS BEGIN TO HEAT

PRINTED CIRCUIT BOARD

Next: End

DHW RADS BEGIN TO HEAT

HARNESS - WIRING

Next: End

CH RADS HEAT

CARTRIDGE - 3 WAY VALVE

Next: End

CH OPERATION

PUMP

Next: End

CH OPERATION 2

PRINTED CIRCUIT BOARD

Next: End

CH OPERATION

HARNESS - WIRING

Next: End

BOILER FIRES NO DEMAND

HARNESS - WIRING

Next: End

BOILER FIRES NO DEMAND

DOMESTIC PLUMBING

Next: End

FUSE FURTHER INVESTIGATION 5

HARNESS - WIRING

Next: End

FUSE FURTHER INVESTIGATION

SOLENOID

Next: End

BURNER DOES NOT IGNITE

HARNESS & PRINTED CIRCUIT BOARD

Next: End

BURNER DOES NOT IGNITE

SOLENOID - GAS VALVE & PRINTED CIRCUIT BOARD

Next: End

OVERHEAT

HEAT EXCHANGER ASSEMBLY - WATERWAYS

Next: End

FAULT CODE RED BLINKING

VALVE - NON RETURN

Next: End

EXCESSIVE FLUE GAS TEMPERATURE

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

FAULT CODE RED SOLID 2

THERMOSTAT - HIGH LIMIT

Next: End

OVERHEAT 3

PRINTED CIRCUIT BOARD

Next: End

DHW COOL RADS COOL

PUMP

Next: End

DHW COOL RADS COOL

SENSOR - NTC

Next: End

DHW COOL RADS COOL

DETECTOR - WATER

Next: End

NOT SWITCHING 2 DHW OPERATION

TIMER

Next: End

EXTERNAL CONTROLS / TIMER SECTION DHW OPERATION

Next: End

NOT SWITCHING DHW OPERATION

TIMER

Next: End

DHW COOL RADS COOL

VALVE - NON RETURN

Next: End

DHW COOL RADS COOL

PLUMBING ISSUE

Next: End

DHW COOL RADS COOL 2

FLUE

Next: End

DHW COOL RADS COOL 2

MIXER

Next: End

DHW COOL RADS COOL 2

VALVE - BY-PASS - AUTO

Next: End

DHW COOL RADS COOL

FLUE

Next: End

DHW COOL RADS COOL

MIXER

Next: End

DHW COOL RADS COOL

VALVE - BY-PASS - AUTO

Next: End

MAXIMUM OUTPUT INFORMATION

Z REDIRECT

Next: End

PUMP OVERRUN FAULTY

PRINTED CIRCUIT BOARD

Next: End

PREHEAT FAULTY

PRINTED CIRCUIT BOARD

Next: End

BLANK FOR CL AND ST INFORMATION

Z REDIRECT

Next: End

FAN DOES NOT RUN

DETECTOR - WATER

Next: End

FAN DOES NOT RUN 2

DETECTOR - WATER

Next: End

FAN DOES NOT RUN

SENSOR - NTC

Next: End

NO SUPPLY TO FAN

PRINTED CIRCUIT BOARD

Next: End

BLANK FOR EXTERNAL DEVICES

Z REDIRECT

Next: End

NO PERMANENT SUPPLY FOR FAULT CODE

PRINTED CIRCUIT BOARD

Next: End

NO PERMANENT SUPPLY RUNNING CONTINUOUSLY

PRINTED CIRCUIT BOARD

Next: End

DEMAND WHEN SHOULDNT BE

PRINTED CIRCUIT BOARD

Next: End

MAX AND MIN FAN SPEEDS

PCB POTENTIOMETERS (MAX AND MIN)

Next: End

FAN SECTION RUNNING CONTINUOUSLY

HARNESS - WIRING

Next: End

MAX AND MIN FAN SPEEDS 2

PCB POTENTIOMETERS (MAX AND MIN)

Next: End

CH OPERATION

VALVE - BY-PASS - AUTO

Next: End

PCB POTENTIOMETERS (HEATING FAN SPEED)

PCB POTENTIOMETER (HTG)

Next: End

BURNER DOES NOT IGNITE POOR IGNITION

CONDENSATE

Next: End

BURNER DOES NOT IGNITE POOR IGNITION

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE POOR IGNITION

COMPENSATION TUBE

Next: End

BURNER DOES NOT IGNITE POOR IGNITION

MIXER

Next: End

NO SPARK POOR IGNITION

CABLE - SPARK

Next: End

BURNER DOES NOT IGNITE POOR IGNITION

SPARK - IGNITION - ELECTRODE

Next: End

PCB POTENTIOMETERS (IGNITION)

PCB POTENTIOMETER (IGN)

Next: End

BLANK FOR AIR PURGE CYCLE INFORMATION

Z REDIRECT

Next: End

RESTRICTED OR BLOCKED

JET

Next: End

RESTRICTED OR BLOCKED 2

JET

Next: End

RESTRICTED OR BLOCKED 3

JET

Next: End

RESTRICTED OR BLOCKED 4

JET

Next: End

RESTRICTED OR BLOCKED 5

JET

Next: End

RESTRICTED OR BLOCKED 6

JET

Next: End

NO POWER TO DIVERTER ROUND HEAD

PRINTED CIRCUIT BOARD

Next: End

DIVERTER VALVE SECTION ROUND

HARNESS - WIRING

Next: End

CH OPERATION COMPACT VERSION

PUMP

Next: End

CH OPERATION 2 COMPACT VERSION

PRINTED CIRCUIT BOARD

Next: End

CH OPERATION COMPACT VERSION

HARNESS - WIRING

Next: End

CH RADS HEAT COMPACT VERSION

CARTRIDGE - 3 WAY VALVE

Next: End

CH OPERATION COMPACT VERSION

VALVE - BY-PASS - AUTO

Next: End

OVERHEAT INVESTIGATION

VALVE 22MM - HEATING

Next: End

WRONG PLACES CAUSING 60 FAULT CODE

JUMPER TAGS

Next: End

OVERHEAT WONT RESET

DETECTOR - WATER

Next: End

OVERHEAT WONT RESET 2

DETECTOR - WATER

Next: End

ON WHEN SHOULD BE OFF

TIMER

Next: End

CO MODE ACTIVATED

Next: End

GAS INLET DHW DEMAMD

GAS INLET PRESSURE

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

DHW FLOW RATE

HEAT EXCHANGER - PLATE

Next: End

DHW FLOW RATE

GOVERNOR - FLOW

Next: End

DHW FLOW RATE

ACTUATOR - DHW

Next: End

DHW FLOW RATE

INLET FILTER - DHW

Next: End

FAN DOES NOT RUN

HARNESS - WIRING

Next: End

PUMP DOES NOT RUN

PUMP

Next: End

NOT OPENING

VALVE - GAS

Next: End

BURNER DOES NOT IGNITE 2

BURNER ASSEMBLY

Next: End

BURNER DOES NOT IGNITE 2

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

BURNER BAFFLES OR NOISY

BURNER ASSEMBLY

Next: End

BURNER BAFFLES OR NOISY

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

DHW TOO HOT

PRINTED CIRCUIT BOARD

Next: End

DHW HOT THEN COOL

PRINTED CIRCUIT BOARD

Next: End

DHW HOT THEN COOL

HEAT EXCHANGER - PLATE

Next: End

DHW HOT THEN COOL

HEAT EXCHANGER ASSEMBLY - WATERWAYS

Next: End

CH OPERATION

PIPE - FLEXIBLE

Next: End

CH OPERATION

GAUGE - PRESSURE - QUICK PRIMER

Next: End

CH OPERATION

SYSTEM PRESSURE

Next: End

CH OPERATION 2

GAUGE - PRESSURE - QUICK PRIMER

Next: End

CH OPERATION 2

SYSTEM PRESSURE

Next: End

DHW HOT THEN COOL

GAUGE - PRESSURE - QUICK PRIMER

Next: End

DHW HOT THEN COOL

SYSTEM PRESSURE

Next: End

DHW COOL RADS COOL

GAUGE - PRESSURE - QUICK PRIMER

Next: End

DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

LEDS DO NOT WORK

Next: End

FUSE FIURTHER INVESTIGATION 2

Z REDIRECT

Next: End

LEDS DO NOT WORK

HARNESS - WIRING

Next: End

FUSE FIURTHER INVESTIGATION

Z REDIRECT

Next: End

FUSE FIURTHER INVESTIGATION 3

Z REDIRECT

Next: End

FUSE FURTHER INVESTIGATION

HARNESS - WIRING

Next: End

FUSE FURTHER INVESTIGATION 3

HARNESS - WIRING

Next: End

FUSE FURTHER INVESTIGATION 2

HARNESS - WIRING

Next: End

FUSE FURTHER INVESTIGATION 4

HARNESS - WIRING

Next: End

FAULT CODE

Z REDIRECT

Next: End

OVERHEAT

GAUGE - PRESSURE - QUICK PRIMER

Next: End

OVERHEAT

SYSTEM PRESSURE

Next: End

AL 40

HARNESS - WIRING

Next: End

AL 40

SWITCH - PRESSURE

Next: End

AL 40

GAUGE - PRESSURE - QUICK PRIMER

Next: End

AL 40

SYSTEM PRESSURE

Next: End

BURNER DOES NOT IGNITE

BURNER ASSEMBLY

Next: End

BURNER DOES NOT IGNITE

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

FAN DOES NOT RUN 2

FAN

Next: End

BURNER DOES NOT IGNITE

TRANSFORMER - IGNITION

Next: End

BOILER FIRES NO DEMAND

FROST PROTECTION MODE

Next: End

BOILER FIRES NO DEMAND 2

PRINTED CIRCUIT BOARD

Next: End

BOILER DOES NOT EST

PRINTED CIRCUIT BOARD

Next: End

BOILER DOES NOT EST

BURNER ASSEMBLY

Next: End

BOILER DOES NOT EST

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

SHORTED TO EARTH

ELECTRODE - DETECTION

Next: End

NOT RESPONDING TO EXTERNAL CONTROLS

Next: End

OPEN CIRCUIT

CLOCK WIRES (HARNESS - WIRING)

Next: End

NO DEMAND

Next: End

OPEN CIRCUIT 2

CLOCK WIRES (HARNESS - WIRING)

Next: End

NO DEMAND DHW RUNS HOT AND COLD

Next: End

OPEN CIRCUIT 2 DHW RUNS HOT AND COLD

CLOCK WIRES (HARNESS - WIRING)

Next: End

NOT RESPONDING TO EXTERNAL CONTROLS DHW RUNS HOT AND COLD

Next: End

OPEN CIRCUIT DHW RUNS HOT AND COLD

CLOCK WIRES (HARNESS - WIRING)

Next: End

OVERHEAT

PUMP

Next: End

AL 55

PRINTED CIRCUIT BOARD

Next: End

BLANK FOR RESET ATTEMPT AL 52

Z REDIRECT

Next: End

AL 34

PRINTED CIRCUIT BOARD

Next: End

FAN DOES NOT RUN 4

HARNESS - WIRING

Next: End

FAN DOES NOT RUN 4

PRINTED CIRCUIT BOARD

Next: End

AL 20

PRINTED CIRCUIT BOARD

Next: End

AL 60

SENSOR - NTC

Next: End

AL 71

HARNESS - WIRING

Next: End

AL 73

HARNESS - WIRING

Next: End

AL 73

PRINTED CIRCUIT BOARD

Next: End

AL 41

PRINTED CIRCUIT BOARD

Next: End

AL 41

HARNESS - WIRING

Next: End

AL 41

SWITCH - PRESSURE

Next: End

AL 41

GAUGE - PRESSURE - QUICK PRIMER

Next: End

AL 41

SYSTEM PRESSURE

Next: End

AL 71

PRINTED CIRCUIT BOARD

Next: End

Z REDIRECT

Next: End

LEDS DO NOT WORK

PRINTED CIRCUIT BOARD

Next: End

BLANK FOR FUSE F2

Z REDIRECT

Next: End

OVERHEAT

HARNESS - WIRING

Next: End

DHW RADS BEGIN TO HEAT

CARTRIDGE - 3 WAY VALVE

Next: End

DHW RADS BEGIN TO HEAT 2

VALVE - MOTORIZED

Next: End

CH OPERATION

VALVE - MOTORIZED

Next: End

FAN DOES NOT RUN

ACTUATOR - DHW

Next: End

FAN DOES NOT RUN

GOVERNOR - FLOW

Next: End

FAN DOES NOT RUN 2

ACTUATOR - DHW

Next: End

FAN DOES NOT RUN

INLET FILTER - DHW

Next: End

DHW FLOW SWTICH SECTION

HARNESS - WIRING

Next: End

BOILER FIRES NO DEMAND

PRINTED CIRCUIT BOARD

Next: End

BOILER FIRES NO DEMAND

ACTUATOR - DHW

Next: End

OBSERVATION GAS VALVE TYPE?

PRINTED CIRCUIT BOARD - FUSE BLOWN

Next: End

BURNER DOES NOT IGNITE 2

PRINTED CIRCUIT BOARD

Next: End

OPENING BUT WRONG MIX

VALVE - GAS (ADJUSTMENT)

Next: End

OPENING BUT WRONG MIX 2

VALVE - GAS (ADJUSTMENT)

Next: End

OVERHEAT

HEAT EXCHANGER - PLATE

Next: End

OVERHEAT 4

PRINTED CIRCUIT BOARD

Next: End

TRIPPING EARLY

THERMOSTAT - HIGH LIMIT

Next: End

FAULT CODE RED SOLID

FAULT CODE - OVERHEAT

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER ASSEMBLY - WATERWAYS

Next: End

NO DEMAND DHW OPERATION

Next: End

OPEN CIRCUIT 2 DHW OPERATION

CLOCK WIRES (HARNESS - WIRING)

Next: End

NOT RESPONDING TO EXTERNAL CONTROLS DHW OPERATION

Next: End

OPEN CIRCUIT DHW OPERATION

CLOCK WIRES (HARNESS - WIRING)

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER - PLATE

Next: End

DHW COOL RADS COOL 2

BURNER ASSEMBLY

Next: End

DHW COOL RADS COOL 2

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

DHW COOL RADS COOL 3

PRINTED CIRCUIT BOARD

Next: End

DHW COOL RADS COOL 2

PRINTED CIRCUIT BOARD

Next: End

DHW COOL RADS COOL

BURNER ASSEMBLY

Next: End

DHW COOL RADS COOL

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

DHW COOL RADS COOL

PRINTED CIRCUIT BOARD

Next: End

FAN DOES NOT RUN 3

HARNESS - WIRING

Next: End

FAN DOES NOT RUN

SWITCH - PRESSURE

Next: End

FAN DOES NOT RUN

GAUGE - PRESSURE - QUICK PRIMER

Next: End

FAN DOES NOT RUN

SYSTEM PRESSURE

Next: End

FAN DOES NOT RUN 3

PRINTED CIRCUIT BOARD

Next: End

RUNNING CONTINUOUSLY

FAN

Next: End

CH OPERATION

Next: End

CH OPERATION 3

PRINTED CIRCUIT BOARD

Next: End

OPENING BUT WRONG MIX 2 POOR IGNITION

VALVE - GAS (ADJUSTMENT)

Next: End

BURNER DOES NOT IGNITE POOR IGNITION

BURNER ASSEMBLY

Next: End

BURNER DOES NOT IGNITE POOR IGNITION

CONDENSING HEAT EXCHANGER ASSEMBLY - FLUEWAYS

Next: End

PASSING ROUND HEAD

CARTRIDGE - 3 WAY VALVE

Next: End

PASSING TO RADS ROUND

VALVE - MOTORIZED

Next: End

CH OPERATION COMPACT VERSION

VALVE - MOTORIZED

Next: End

CH OPERATION COMPACT VERSION

Next: End

AL 60

PRINTED CIRCUIT BOARD

Next: End

OVEREHEAT

PRINTED CIRCUIT BOARD

Next: End

FIRING FOR NO REASON

PRINTED CIRCUIT BOARD

Next: End

FAULT CODE PRESENT

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1646

DISPLAY / LEDS DO NOT ILLUMINATE

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1012

BOILER ATTEMPTS TO FIRE AFTER SELF CHECK COMPLETE - NO DEMAND PRESENT

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p2116

1 FLOW RESTRICTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW COMPONENTS

Next: !p1048

2 FLOW SENSOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW COMPONENTS

Next: !p1050

3 DHW INLET FILTER BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW COMPONENTS

Next: !p1052

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1294

HEAT EXCHANGER FLUEWAYS OR INSULATION PANELS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1296

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1389

HEAT EXCHANGER FLUEWAYS OR INSULATION PANELS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1391

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2304

DIFFERENTIAL TEMPERATURE EXCESSIVELY HIGH

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p1504

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1553

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1556

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1558

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1560

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1562

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1564

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1566

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1568

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1739

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1741

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1831

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p1833

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1921

HEAT EXCHANGER FLUEWAYS OR INSULATION PANELS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1923

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p1193

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p1316

BURNER IGNITES BUT BAFFLES OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p1376

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2260

HEAT EXCHANGER FLUEWAYS OR INSULATION PANELS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2262

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p2449

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p2451

1 FLOW RESTRICTOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW COMPONENTS

Next: !p2545

2 FLOW SENSOR BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW COMPONENTS

Next: !p2547

3 DHW INLET FILTER BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW COMPONENTS

Next: !p2549

BOILER GOES TO A FAULT BEFORE 80 °C

CHARACTERISTIC TEST FROM OBSERVATION CH - OVERHEAT OCCUR

Next: p2611

TEMPERATURE EXCEEDS 88 °C BURNER REMAINS LIT

CHARACTERISTIC TEST FROM OBSERVATION CH - OVERHEAT OCCUR

Next: !p2613

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2663

DIFFERENTIAL TEMPERATURE EXCESSIVELY HIGH

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p2665

GAS RATE UNSATISFACTORY

Next: p2685

UNABLE TO GAS RATE (E.G. LPG INSTALLATION WITH NO METER)

Next: p2687

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2695

HEAT EXCHANGER FLUEWAYS OR INSULATION PANELS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2697

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2707

HEAT EXCHANGER FLUEWAYS OR INSULATION PANELS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2709

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p2731

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p2733

FAN RUNS CONTINUOUSLY AT HIGH SPEED

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p2748

BURNER IGNITES BUT IGNITION POOR (HEAVY / DELAYED / EXPLOSIVE / SLOW)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p2852

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2932

HEAT EXCHANGER FLUEWAYS OR INSULATION PANELS UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2934

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2277

BOILER REACHES TEMPERATURE - RADIATORS DO NOT HEAT OR ONLY GET WARM

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1522

BOILER TEMPERATURE AND SYSTEM TEMPERATURE LOW - BOILER REMAINS LIT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1538

EXCESSIVE SYSTEM PRESSURE RISE AS SYSTEM HEATS

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1519

DHW COOL - RADIATORS REMAIN COOL OR DO NOT INCREASE IN TEMPERATURE

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1417

DHW COOL - RADIATORS BEGIN TO HEAT OR INCREASE IN TEMPERATURE

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p3000

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1396

DHW RUNS HOT THEN COOL

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1483

03/01/2019 12:24:39 1811_1_50_1 22/01/2019 14:17:09

04/01/2019 14:26:21

Next: End

OBSERVATION DHW INLET SERVICE VALVE

Next: p1042, !f1043

RESISTANCE DHW FLOW SWITCH AND HARNESS - DEMAND

REMOVE CONNECTOR X16 FROM THE PCB
HOT WATER TAP ON WITH 3 L/MIN FLOW RATE

Next: p1054, f2199

VOLTAGE FAN - POWER SUPPLY AT PCB

Next: !p1186, !f1185

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p1188, !f1189

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p1275, f2232

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN
PIPES AS INDICATED BY THE RED ARROWS

Next: p1497, ?1501, ?1503

VOLTAGE MAINS INPUT - BOILER

Next: p1592, f1593

RESISTANCE FUSED SPUR

REMOVE FUSE FROM FUSED SPUR

Next: !p1594, f1595

FUSE FURTHER INVESTIGATION - FUSED SPUR

THE INFORMATION PROV

Next: !p1596, !f1597

FUSE FURTHER INVESTIGATION - MAINS INPUT

THE INFORMATION PROV

Next: !p1600, !f1601

FUSE FURTHER INVESTIGATION - F1 PCB FUSE

THE INFORMATION PROV

Next: !p1604, !f1605

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: p1609, f1610

RESISTANCE PUMP

REMOVE PUMP ELECTRICAL COVER
REMOVE ELECTRICAL CONNECTIONS FROM PUMP ASSEMBLY

Next: !p1611, !f1612

RESISTANCE FAN

REMOVE POWER ELECTRICAL CONNECTOR FROM FAN ASSEMBLY

Next: !p1639, !f1643

RESISTANCE SPARK GENERATOR

REMOVE ELECTRICAL CONNECTOR TO SPARK GENERATOR.

Next: !p1638, !f1624

RESISTANCE DIVERTER VALVE ACTUATOR

REMOVE ELECTRICAL CONNECTOR TO DIVERTER ACTUATOR

Next: !p1640, !f1645

RESET APPLIANCE

ENSURE NO DEMANDS ARE PRESENT
ENSURE BOILER IS COOL

Next: p1730, f1731

RESISTANCE OVERHEAT STAT & HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p3093, f1733

RESISTANCE OVERHEAT STAT

REMOVE THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: p2476, !f1735

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: p2453, f1826

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE THE WIRES FROM THE LWPS

Next: !p1827, f1828

OBSERVATION PRESSURE SYSTEM

Next: !p1829, ?1830, ?1832

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}

Next: p1939, !f1938

TEMPERATURE FLOW PIPE - FROST PROTECTION

ATTACH FGA TEMPERATURE SENSOR TO THE BOILER'S FLOW PIPE

Next: !p2135, f2136

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p2137, !f2138

RESISTANCE DHW FLOW SWITCH AND HARNESS - NO DEMAND

REMOVE CONNECTOR X16 FROM THE PCB
ENSURE NO DEMANDS

Next: !p2555, f2556

RESISTANCE DHW FLOW SWITCH - DEMAND

DISCONNECT 1X ELECTRICAL CONNECTOR TO THE DHW FLOW SWITCH
HOT WATER TAP ON WITH 3 L/MIN FLOW RATE

Next: !p2550, f2542

RESISTANCE GAS VALVE HARNESS

REMOVE CONNECTOR CN3 FROM THE PCB & ELECTRICAL CONNECTOR FROM GAS VALVE

Next: p2573, !f2572

RESISTANCE RECTIFICATION HARNESS

REMOVE CONNECTOR FA2 FROM THE PCB

Next: p2273, !f2274

RESISTANCE TIMER

REMOVE THE WIRES FROM TERMINAL 1 AND 4 OF THE TIMER

Next: !p2284, !f2285

RESISTANCE TIMER AND HARNESS

TIMER SET TO ON POSITION
REMOVE THE 2 BLACK WIRES (LABELLED "BLACK") FROM THEIR TERMINALS

Next: !p2287, f2288

RESISTANCE TIMER

REMOVE THE WIRES FROM TERMINAL 1 AND 4 OF THE TIMER

Next: !p2289, !f2290

RESISTANCE TIMER AND HARNESS

TIMER SET TO ON POSITION
REMOVE THE 2 BLACK WIRES (LABELLED "BLACK") FROM THEIR TERMINALS

Next: !p2307, f2308

RESISTANCE TIMER

REMOVE THE WIRES FROM TERMINAL 1 AND 4 OF THE TIMER

Next: !p2309, !f2310

RESISTANCE TIMER

REMOVE THE WIRES FROM TERMINAL 1 AND 4 OF THE TIMER

Next: !p2315, !f2316

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p2333, !f2334

INSPECTION JUMPER TAGS

Next: !p2375, !f2376

OBSERVATION RESET APPLIANCE

Next: !p2378, !f2379

OBSERVATION FAN RUNS (AL 34)

CH & DHW TEMPERATURE CONTROLS SET TO MAX
ENSURE BOILER IS COOL

Next: p2381, f2387

VOLTAGE FAN - POWER SUPPLY AT FAN

Next: p2388, f2389

VOLTAGE FAN - POWER SUPPLY AT PCB

Next: !p2390, !f2391

INFORMATION UHT / CPA

AL 21 FAULT CODE MEA

Next: !p2421, !f2741

RESISTANCE DHW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: p3090, f2427

RESISTANCE DHW TEMPERATURE SENSOR HARNESS

REMOVE ELECTRICAL CONNECTOR TO DHW TEMPERATURE SENSOR
& CONNECTOR X16 FROM THE PCB

Next: !p2428, !f2429

RESISTANCE FLOW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: !p2452, f2431

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: !p2432, !f2433

RESISTANCE RETURN TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: !p2440, f2435

RESISTANCE RETURN TEMPERATURE SENSOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: !p2436, !f2437

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: !p2443, f2444

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE THE WIRES FROM THE LWPS

Next: !p2445, f2446

OBSERVATION PRESSURE SYSTEM

Next: !p2447, ?2448, ?2450

FUSE FURTHER INVESTIGATION - F2 PCB FUSE

THE INFORMATION PROV

Next: !p2474, !f2475

VOLTAGE DIVERTER VALVE AT PCB DHW

{GAINPCBACS}

Next: p2518, !f2517

VOLTAGE DIVERTER VALVE AT PCB CH

{GAINPCBACS}

Next: p2538, !f2537

INSPECTION DHW FLOW COMPONENTS

DRAIN THE DOMESTIC H

Next: !p2543, ?2544, ?2546, ?2548

RESISTANCE DHW FLOW SWITCH - NO DEMAND

DISCONNECT 1X ELECTRICAL CONNECTOR TO THE DHW FLOW SWITCH
ENSURE NO DEMAND

Next: p2557, !f2558

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER (FAULT CODE)

ATTACH TEMPERATURE PROBES TO FLOW & RETURN
PIPES AS INDICATED BY THE RED ARROWS

Next: p2602, !f2603

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN
PIPES AS INDICATED BY THE RED ARROWS

Next: p2661, ?2662, ?2664

RESISTANCE TIMER AND HARNESS

TIMER SET TO ON POSITION
REMOVE THE 2 BLACK WIRES (LABELLED "BLACK") FROM THEIR TERMINALS

Next: !p2668, f2669

RESISTANCE TIMER

REMOVE THE WIRES FROM TERMINAL 1 AND 4 OF THE TIMER

Next: !p2670, !f2671

RESISTANCE TIMER

REMOVE THE WIRES FROM TERMINAL 1 AND 4 OF THE TIMER

Next: !p2676, !f2677

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: p2725, f2726

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE THE WIRES FROM THE LWPS

Next: !p2727, f2728

OBSERVATION PRESSURE SYSTEM

Next: !p2729, ?2730, ?2732

OBSERVATION DIVERTER VALVE OPERATION DHW (COMPACT)

Next: !p3009, f3010

VOLTAGE DIVERTER VALVE AT PCB DHW

{GAINPCBACS}

Next: p3011, !f3012

PUMP LIMPET TEST

Next: p3044, !f3043

VOLTAGE DIVERTER VALVE AT PCB CH

{GAINPCBACS}

Next: p3047, !f3048

VOLTAGE MAINS INPUT - PCB

{GAINPCBACS}

Next: p1590, f1591

OBSERVATION COLD WATER SUPPLY

Next: p1044, !f1045

INSPECTION DHW FLOW COMPONENTS

DRAIN THE DOMESTIC H

Next: !p1046, ?1047, ?1049, ?1051

VOLTAGE FAN - POWER SUPPLY AT FAN

Next: p1089, f1086

VOLTAGE FAN - PERMANENT SUPPLY

REMOVE 4 WIRE CABLE FROM FAN ASSEMBLY
ENSURE NO DEMANDS

Next: p2720, !f2740

FAN RUNS - SIGNAL CONTROL DISCONNECTED

REMOVE SIGNAL CONTROL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1064, !f1098

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO THE PUMP TERMINALS

Next: !p1192, !f1191

INSPECTION CONDENSATE

Next: p1215, !f1195

OBSERVATION GAS VALVE OPENS

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT
ENSURE NO DEMANDS

Next: p1231, f1219

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p1194, !f1218

OBSERVATION SPARKING OCCURS

REMOVE ELECTRODE LEA

Next: p1257, f1936

INSPECTION MIXER

Next: p2458, !f1239

INSPECTION COMPENSATION TUBE

Next: p1232, !f1271

INSPECTION COMPENSATION TUBE

Next: p1284, !f1277

INSPECTION MIXER

Next: p1305, !f1291

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER ASSEMBLY FROM BOILER

Next: !p1292, ?1293, ?1295

RESISTANCE GAS VALVE HARNESS

REMOVE CONNECTOR CN3 FROM THE PCB & ELECTRICAL CONNECTOR FROM GAS VALVE

Next: p2958, !f1304

INSPECTION FLUE

Next: p1297, !f1315

INSPECTION CONDENSATE

Next: p1317, !f1318

INSPECTION COMPENSATION TUBE

Next: p1972, !f1320

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p1321, !f1322

RESISTANCE RECTIFICATION TO EARTH AT PCB

REMOVE CONNECTOR FA2 FROM THE PCB

Next: p2255, f2272

INSPECTION FLUE

Next: p1319, !f1375

INSPECTION CONDENSATE

Next: p1377, !f1378

INSPECTION COMPENSATION TUBE

Next: p1379, !f1380

INSPECTION FLUE

Next: p1385, !f1382

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p2966, !f1384

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER ASSEMBLY FROM BOILER

Next: !p2576, ?1388, ?1390

INSPECTION MIXER

Next: p1381, !f1392

RESISTANCE DHW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: !p1397, !f1398

OBSERVATION PRESSURE SYSTEM

Next: p2652, ?1565, ?1567

OBSERVATION PRESSURE SYSTEM

Next: p1484, ?1561, ?1563

PUMP LIMPET TEST

Next: p1486, !f1487

RESISTANCE DHW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: p1488, !f1489

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p2755, !f1491

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN
PIPES AS INDICATED BY THE RED ARROWS

Next: !p1496, f1493

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p1499, !f1500

INSPECTION EXPANSION VESSEL PRESSURE

DRAIN BOILER PRIMARY SYSTEM WATER

Next: !p1520, !f1521

OBSERVATION SERVICE VALVE FLOW & RETURN

Next: p1523, !f1524

OBSERVATION PRESSURE SYSTEM

Next: p3015, ?1557, ?1559

OBSERVATION PRESSURE SYSTEM

Next: p1545, ?1552, ?1554

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p1541, !f1542

RESISTANCE RETURN TEMPERATURE SENSOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: p2847, !f1544

PUMP LIMPET TEST

Next: p1539, !f1551

RESISTANCE FUSE F1

REMOVE FUSE FROM PCB

Next: p2469, f1603

RESISTANCE FUSE - MAINS INPUT

REMOVE MAINS INPUT FUSE FROM TERMINAL BLOCK

Next: !p1598, f1599

RESISTANCE FAN AND HARNESS

REMOVE CONNECTOR CN1 FROM THE PCB

Next: p1613, f1614

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE CONNECTOR CN2 FROM THE PCB

Next: p1615, f1616

RESISTANCE DIVERTER VALVE ACTUATOR & HARNESS

REMOVE CONNECTOR CN5 FROM THE PCB

Next: p2318, f1618

FAULT CODE / NOTIFICATION

PLEASE SELECT THE APPROPRIATE FAULT CODE FROM THE LIST BELOW:

Next: !p1647, !f1648

OBSERVATION PRESSURE SYSTEM

Next: p3055, ?1738, ?1740

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER ASSEMBLY FROM BOILER

Next: !p2577, ?1920, ?1922

RESISTANCE FAN HARNESS

REMOVE SPEED CONTROL CONNECTOR FROM FAN ASSEMBLY

Next: !p1933, !f1934

RESISTANCE SPARK GENERATOR HARNESS

REMOVE CN2 FROM THE PCB

Next: !p1940, !f1941

INSPECTION MIXER

Next: p1355, !f1996

DISCONNECT FAN SPEED CONTROL CONNECTOR

REMOVE FAN SPEED CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: !p2457, !f2001

OBSERVATION IS AF DISPLAYED

Next: p3102, f2134

RESISTANCE DHW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: !p2139, !f2140

OBSERVATION CONTROL KNOB TO DHW ONLY BOILER FIRES?

SELECTOR SWITCH TO DHW ONLY POSITION

Next: p2172, f2175

DISCONNECT EXTERNAL CONTROLS

DISCONNECT THE EXTERNAL CONTROLS FROM THE MAIN
TERMINAL STRIP CONNECTIONS 2-3 AND MAKE SAFE

Next: p3098, !f2173

RESISTANCE IGNITION ELECTRODE

REMOVE THE IGNITION ELECTRODE FROM THE BURNER DOOR ASSEMBLY

Next: p2950, !f2230

RESISTANCE RECTIFICATION HARNESS

REMOVE CONNECTOR FA2 FROM THE PCB

Next: p2263, !f2270

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER ASSEMBLY FROM BOILER

Next: !p2257, ?2259, ?2261

RESISTANCE DETECTION ELECTRODE

DISCONNECT THE RECTI

Next: p2256, !f2271

RESISTANCE DETECTION ELECTRODE

DISCONNECT THE RECTI

Next: !p2275, !f2276

OBSERVATION LINK EXTERNAL CONTROLS

REMOVE THE WRING FRO

Next: p2278, f2286

RESISTANCE HARNESS TO EXTERNAL CONTROLS WITH LINK

REMOVE CONNECTOR CN1 FROM THE PCB

Next: p2280, !f2281

RESISTANCE TIMER AND HARNESS

TIMER SET TO ON POSITION
REMOVE THE 2 BLACK WIRES (LABELLED "BLACK") FROM THEIR TERMINALS

Next: !p2282, f2283

OBSERVATION LINK EXTERNAL CONTROLS

REMOVE THE WRING FRO

Next: p2305, f2306

RESISTANCE HARNESS TO EXTERNAL CONTROLS WITH LINK

REMOVE CONNECTOR CN1 FROM THE PCB

Next: p2311, !f2312

RESISTANCE TIMER AND HARNESS

TIMER SET TO ON POSITION
REMOVE THE 2 BLACK WIRES (LABELLED "BLACK") FROM THEIR TERMINALS

Next: !p2313, f2314

RESISTANCE GAS VALVE HARNESS

REMOVE CONNECTOR CN3 FROM THE PCB & ELECTRICAL CONNECTOR FROM GAS VALVE

Next: p2564, !f2563

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p2325, !f2326

RESISTANCE RETURN TEMPERATURE SENSOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: p2327, !f2328

RESISTANCE DHW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: p2330, !f2329

OBSERVATION PUMP RUNS

Next: p2331, f2332

PUMP LIMPET TEST

Next: p2600, !f2337

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO THE PUMP TERMINALS

Next: !p2335, !f2336

RESISTANCE FAN HARNESS

REMOVE SPEED CONTROL CONNECTOR FROM FAN ASSEMBLY

Next: p2742, !f2384

VOLTAGE DC (HALL SENSOR) AT PCB

REFIT 4 WIRE FAN CABLE TO FAN ASSEMBLY

Next: !p2385, !f2386

FAN RUNS - SIGNAL CONTROL DISCONNECTED

REMOVE SIGNAL CONTROL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: !p2418, !f2393

RESET APPLIANCE (SYSTEM PRESSURE)

ENSURE NO DEMANDS ARE PRESENT
ENSURE BOILER IS COOL

Next: !p2454, !f2455

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE SPARK GENERATOR AND IGNITION ELECTRODE

Next: p2217, !f2468

RESISTANCE FUSE F2

REMOVE FUSE FROM PCB

Next: p1997, f2473

RESISTANCE FLUE OVERHEAT THERMOSTAT

REMOVE THE WHITE WIR

Next: !p2477, !f2478

OBSERVATION DIVERTER VALVE OPERATION DHW

REMOVE DIVERTER VALVE HEAD FROM THE APPLIANCE AND PLACE IN A SAFE LOCATION

Next: !p2512, f2516

RESISTANCE ACTUATOR HARNESS

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR
REMOVE CONNECTOR CN5 FROM THE PCB

Next: !p2519, !f2520

OBSERVATION DIVERTER VALVE OPERATION CH

REMOVE DIVERTER VALVE HEAD FROM THE APPLIANCE AND PLACE IN A SAFE LOCATION

Next: p2523, f2536

INSPECTION DIVERTER VALVE SPINDLE

Next: p2531, !f2528

PUMP LIMPET TEST

Next: p2844, !f2532

RESISTANCE ACTUATOR HARNESS

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR
REMOVE CONNECTOR CN5 FROM THE PCB

Next: !p2539, !f2540

RESISTANCE DHW FLOW SWITCH - NO DEMAND (WATER ISOLATED)

DISCONNECT 1X ELECTR

Next: !p2559, !f2560

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p2565, !f2566

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p2574, !f2575

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN
PIPES AS INDICATED BY THE RED ARROWS

Next: p2606, f2601

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p2604, !f2605

TEMPERATURE FLUE GAS

INSERT FGA TEMPERATURE PROBE INTO FLUE SAMPLING POINT

Next: p2608, !f2607

OBSERVATION APPLIANCE TO MAXIMUM TEMP - FAULT CODE REOCCURS?

ATTACH FGA TEMPERATURE CLAMP TO THE FLOW PIPE

Next: p2609, ?2610, ?2612

OBSERVATION PUMP OVERRUN

Next: !p2616, !f2617

RESISTANCE OVERHEAT STAT

REMOVE THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p2614, !f2615

PUMP LIMPET TEST

Next: p2653, !f2654

RESISTANCE DHW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: p2655, !f2656

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p2781, !f2658

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN
PIPES AS INDICATED BY THE RED ARROWS

Next: p2659, f2660

TEMPERATURE TAP AND BOILER DISCREPANCY?

Next: p2680, !f2681

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p2678, !f2679

OBSERVATION LINK EXTERNAL CONTROLS

REMOVE THE WRING FRO

Next: p2666, f2667

RESISTANCE HARNESS TO EXTERNAL CONTROLS WITH LINK

REMOVE CONNECTOR CN1 FROM THE PCB

Next: p2672, !f2673

RESISTANCE TIMER AND HARNESS

TIMER SET TO ON POSITION
REMOVE THE 2 BLACK WIRES (LABELLED "BLACK") FROM THEIR TERMINALS

Next: !p2674, f2675

GAS RATE

Next: p2682, ?2684, ?2686

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p2710, !f2711

INSPECTION FLUE

Next: p2700, !f2701

INSPECTION FLUE

Next: p2688, !f2689

INSPECTION MIXER

Next: p2982, !f2691

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER ASSEMBLY FROM BOILER

Next: p2692, ?2694, ?2696

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p2698, !f2699

INSPECTION MIXER

Next: p2992, !f2703

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER ASSEMBLY FROM BOILER

Next: !p2704, ?2706, ?2708

VOLTAGE FAN - DEMAND

REMOVE 4 WIRE CABLE FROM FAN ASSEMBLY

Next: p1929, f2724

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p2734, !f2735

RESISTANCE RETURN TEMPERATURE SENSOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: p2736, !f2737

RESISTANCE DHW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: !p2738, !f2739

VOLTAGE FAN - PERMANENT SUPPLY

REMOVE 4 WIRE CABLE FROM FAN ASSEMBLY
ENSURE NO DEMANDS

Next: p2383, !f2746

RESISTANCE FAN HARNESS

REMOVE SPEED CONTROL CONNECTOR FROM FAN ASSEMBLY

Next: p2749, !f2780

VOLTAGE FAN - PERMANENT SUPPLY

REMOVE 4 WIRE CABLE FROM FAN ASSEMBLY
ENSURE NO DEMANDS

Next: p2751, !f2752

VOLTAGE FAN - NO DEMAND

REMOVE 4 WIRE CABLE FROM FAN ASSEMBLY
ENSURE NO DEMANDS

Next: !p2753, !f2754

OBSERVATION MAX AND MIN FAN SPEEDS

REMOVE SELECTOR SWITCH CONTROL KNOB
ENSURE NO DEMANDS

Next: p1490, !f2779

OBSERVATION MAX AND MIN FAN SPEEDS

REMOVE SELECTOR SWITCH CONTROL KNOB
ENSURE NO DEMANDS

Next: p2657, !f2836

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p2845, !f2846

OBSERVATION HEATING FAN SPEED

REMOVE SELECTOR SWITCH CONTROL KNOB
ENSURE NO DEMANDS

Next: !p2849, !f2848

INSPECTION CONDENSATE

Next: p2853, !f2854

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p2920, !f2856

INSPECTION COMPENSATION TUBE

Next: p2921, !f2922

INSPECTION MIXER

Next: p2935, !f2924

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE SPARK GENERATOR AND IGNITION ELECTRODE

Next: p2925, !f2926

RESISTANCE IGNITION ELECTRODE

REMOVE THE IGNITION ELECTRODE FROM THE BURNER DOOR ASSEMBLY

Next: p2974, !f2928

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER ASSEMBLY FROM BOILER

Next: !p2929, ?2931, ?2933

OBSERVATION IGNITION FAN SPEED

REMOVE SELECTOR SWITCH CONTROL KNOB
ENSURE NO DEMANDS

Next: p2923, !f2947

INSPECTION INJECTOR

REMOVE THE PIPE RUNNING FROM THE GAS VALVE TO THE COMBUSTION CHAMBER AND REMOVE THE INJECTOR FROM IT

Next: p1918, !f2957

INSPECTION INJECTOR

REMOVE THE PIPE RUNNING FROM THE GAS VALVE TO THE COMBUSTION CHAMBER AND REMOVE THE INJECTOR FROM IT

Next: p1285, !f2965

INSPECTION INJECTOR

REMOVE THE PIPE RUNNING FROM THE GAS VALVE TO THE COMBUSTION CHAMBER AND REMOVE THE INJECTOR FROM IT

Next: p1383, !f2973

INSPECTION INJECTOR

REMOVE THE PIPE RUNNING FROM THE GAS VALVE TO THE COMBUSTION CHAMBER AND REMOVE THE INJECTOR FROM IT

Next: p2927, !f2981

INSPECTION INJECTOR

REMOVE THE PIPE RUNNING FROM THE GAS VALVE TO THE COMBUSTION CHAMBER AND REMOVE THE INJECTOR FROM IT

Next: p2690, !f2991

INSPECTION INJECTOR

REMOVE THE PIPE RUNNING FROM THE GAS VALVE TO THE COMBUSTION CHAMBER AND REMOVE THE INJECTOR FROM IT

Next: p2702, !f2999

OBSERVATION DIVERTER VALVE TYPE

Next: p2511, f3008

RESISTANCE ACTUATOR HARNESS (COMPACT)

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR
REMOVE CONNECTOR CN5 FROM THE PCB

Next: !p3013, !f3014

OBSERVATION DIVERTER VALVE TYPE

Next: p2522, f3042

OBSERVATION DIVERTER VALVE OPERATION CH (COMPACT)

Next: p3045, f3046

INSPECTION DIVERTER VALVE SPINDLE (COMPACT)

Next: p3052, !f3051

RESISTANCE ACTUATOR HARNESS (COMPACT)

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR
REMOVE CONNECTOR CN5 FROM THE PCB

Next: !p3049, !f3050

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p3053, !f3054

OBSERVATION SERVICE VALVE FLOW & RETURN

Next: p2324, !f3089

INSPECTION JUMPER TAGS

Next: !p3091, !f3092

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p3094, !f3095

RESISTANCE RETURN TEMPERATURE SENSOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: !p3096, !f3097

RESISTANCE TIMER AND HARNESS (NO DEMAND)

TIMER SET TO OFF POSITION
REMOVE THE 2 BLACK WIRES (LABELLED "BLACK") FROM THEIR TERMINALS

Next: !p3099, !f3101

OBSERVATION IS CO DISPLAYED

Next: p2152, !f3116

Welcome to the XSol Diagnostic System