XSol Diagnostic System

Welcome to the XSol Diagnostic System

This system provides interactive diagnostic tests with proper sequence navigation based on the decoded .seq file logic.

Start Diagnostic Sequence

or choose a specific test below:

VIESSMANN VITODENS 100 24KW SYSTEM

WARNING - IMPORTA

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

INFORMATION CASE REMOVAL

Next: &3, !f2

OBSERVATION APPLIANCE SELF CHECK

ENSURE NO DEMANDS

Next: &73, ?4, ?6, ?8, ?1700, ?2425

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &3067, !f74

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS INLET PRESSURE TEST POINT

Next: &358, !f357

CH OPERATION

CH TEMPERATURE CONTROL TURNED TO MAX

Next: &1180, ?361, ?363, ?1285

DISPLAY FAULT CODE 30 / 38

OK TO BE BLANK

Next: &nff, f528

DISPLAY FAULT CODE E5

OK TO BE BLANK

Next: &nff, p1079

DISPLAY FAULT CODE B1 / B5 / F0

OK TO BE BLANK

Next: &nff, f585

DISPLAY FAULT CODE F2

OK TO BE BLANK

Next: &nff, f617

DISPLAY FAULT CODE F3

OK TO BE BLANK

Next: &nff, f1113

DISPLAY FAULT CODE F8

OK TO BE BLANK

Next: &nff, f654

DISPLAY FAULT CODE F9 / FA

OK TO BE BLANK

Next: &nff, f668

DISPLAY FAULT CODE FD

OK TO BE BLANK

Next: &nff, f678

FUSE FURTHER INVESTIGATION

NOT USED

Next: &nff, f686

OBSERVATION FAN RUNS CH DEMAND

ENSURE APPLIANCE IS COOL
CH TEMPERATURE CONTROL TURNED TO MAX

Next: &1295, ?1803, ?1805

HOT WATER OPERATION

HW DEMAND

Next: &1911, ?1181, ?1183

OBSERVATION BURNER IGNITION & ESTABLISH

CH TEMPERATURE CONTROL TURNED TO MAX

Next: &356, ?1296, ?1298, ?1300

DISPLAY FAULT CODE 0B

OK TO BE BLANK

Next: &nff, f2889

DISPLAY FAULT CODE OC / E4

OK TO BE BLANK

Next: &nff, f1491

DISPLAY FAULT CODE E6

OK TO BE BLANK

Next: &nff, f1493

DISPLAY FAULT CODE F5

OK TO BE BLANK

Next: &nff, f2553

DISPLAY FAULT CODE F7

OK TO BE BLANK

Next: &nff, f1497

DISPLAY FAULT CODE 58

OK TO BE BLANK

Next: &nff, f1693

OBSERVATION PUMP OVERRUN

CH TEMPERATURE CONTROL TURNED TO MAX

Next: &nff, !f1912

OBSERVATION PUMP RUNS

CH TEMPERATURE CONTROL TURNED TO MAX

Next: &989, f3068

FAULT CODE E5

ELECTRODE - IGNITING

Next: End

FAULT CODE E5

CONTROL UNIT (PCB)

Next: End

FAULT CODE F2 2

CONTROL UNIT (PCB)

Next: End

FAULT CODE FD FF 2

ELECTRODE - IGNITING

Next: End

FAULT CODE F3

CONTROL UNIT (PCB)

Next: End

FAULT CODE FD FF

ELECTRODE - IGNITING

Next: End

FAULT CODE FD FF

CONTROL UNIT (PCB)

Next: End

FUSE FURTHER INVESTIGATION

PUMP

Next: End

FAULT CODE F2 2

THERMOCOUPLE

Next: End

FAULT CODE F2

Next: End

FAULT CODE 2

Z REDIRECT

Next: End

EXCESSIVE PRESSURE RISE

EXPANSION VESSEL

Next: End

APPLIANCE TO TEMP RADS COOL

PUMP

Next: End

APPLIANCE TO TEMP RADS COOL

SYSTEM PRESSURE

Next: End

APPLIANCE TO TEMP RADS COOL

GAS COCK - HEATING WATER

Next: End

BURNER BAFFLES OR NOISY

CONDENSATE PIPEWORK

Next: End

BURNER BAFFLES OR NOISY

GAS INLET PRESSURE

Next: End

BURNER BAFFLES OR NOISY

FLUE

Next: End

BURNER DOES NOT IGNITE 2

CONDENSATE PIPEWORK

Next: End

BURNER DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

BURNER DOES NOT IGNITE 3

GAS TRAIN

Next: End

SERVICE MODE 2

Z REDIRECT

Next: End

BOILER TEMP LOW RADS COOL

FLUE

Next: End

BOILER TEMP LOW RADS COOL

SENSOR - TEMPERATURE

Next: End

APPLIANCE FAILS TO REACH SET TEMP

SYSTEM PRESSURE

Next: End

APPLIANCE FAILS TO REACH SET TEMP

GAS INLET PRESSURE

Next: End

APPLIANCE FAILS TO REACH SET TEMP

CONTROL KNOB

Next: End

BLANK DISPLAY

FUSE (PCB FUSE)

Next: End

BLANK DISPLAY

FUSE (FUSED SPUR)

Next: End

NO VOLTAGE TO PRESSURE SENSOR

CONTROL UNIT (PCB)

Next: End

ERROR CODE F7

HARNESS - CABLE X9

Next: End

BURNER IGNITES BUT BAFFLES / NOISY

TOP - VENTURI - TYPE 002

Next: End

FAULT CODE F2 3

CONTROL UNIT (PCB)

Next: End

FAULT CODE OC E4

Next: End

NO VOLTAGE SENT TO PRESSURE SENSOR

CONTROL UNIT (PCB)

Next: End

ERROR CODE E6

HARNESS - CABLE X9

Next: End

ERROR CODE E6

SYSTEM PRESSURE

Next: End

FAULT CODE F2

SENSOR - TEMPERATURE

Next: End

FAULT CODE 58

DIP SWITCH

Next: End

LOW PRESSURE

SYSTEM PRESSURE

Next: End

RESTRICTED / BLOCKED

TOP - VENTURI - TYPE 002

Next: End

FUSE FURTHER INVESTIGATION

GAS TRAIN

Next: End

FAN DOES NOT RUN

HARNESS - CABLE X8

Next: End

NO PUMP OVERRUN

CONTROL UNIT (PCB)

Next: End

BURNER DOES NOT IGNITE

CONDENSATE PIPEWORK

Next: End

BURNER DOES NOT IGNITE

TOP - VENTURI - TYPE 002

Next: End

BURNER DOES NOT IGNITE 1

ELECTRODE - IGNITING

Next: End

CASE REMOVAL

Z REDIRECT

Next: End

BURNER DOES NOT ESTABLISH 2

ELECTRODE - IGNITING

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

TRANSFORMER - IGNITION C/W IONISATION CONNECTING CABLE

Next: End

IGNITES BUT DOES NOT ESTABLISH

SPARK GENERATOR - ZIG 2/12

Next: End

NO CH

CLOCK / TIMESWITCH - MECHANICAL

Next: End

FAULT CODE F2

GAS COCK - HEATING WATER

Next: End

FAN DOES NOT RUN

SENSOR - TEMPERATURE

Next: End

FAN DOES NOT RUN

SWITCH - PRESSURE

Next: End

DOES NOT IGNITE

TRANSFORMER - IGNITION C/W IONISATION CONNECTING CABLE

Next: End

BURNER DOES NOT IGNITE 4

ELECTRODE - IGNITING

Next: End

PUMP RUNS CONTINUALLY

DIP SWITCH

Next: End

ON WITH NO DEMAND

CLOCK / TIMESWITCH - MECHANICAL

Next: End

SELF CHECK

SENSOR - TEMPERATURE

Next: End

BURNER DOES NOT IGNITE 1

TOP - VENTURI - TYPE 002

Next: End

UNABLE TO RESET SERVICE MODE

CONTROL UNIT (PCB)

Next: End

UNABLE TO RESET PUMP PURGE MODE

CONTROL UNIT (PCB)

Next: End

FAN DOES NOT RUN

TOP - VENTURI - TYPE 002

Next: End

FAN DOES NOT RUN

SWITCH - PRESSURE TUBE

Next: End

FAN DOES NOT RUN

SYSTEM PRESSURE

Next: End

FAULT CODE F2

SYSTEM PRESSURE

Next: End

FAULT CODE F5

SWITCH - PRESSURE

Next: End

ERROR CODE F5

HARNESS - CABLE X8

Next: End

FAULT CODE F5

SWITCH - PRESSURE TUBE

Next: End

FAULT CODE F5

GAS TRAIN

Next: End

FAULT CODE F5

FLUE

Next: End

FAULT CODE F5

TOP - VENTURI - TYPE 002

Next: End

FAULT CODE F5

HEAT EXCHANGER

Next: End

APS FAULT CODE F5

SWITCH - PRESSURE

Next: End

MOISTURE / BLOCKAGE

SWITCH - PRESSURE TUBE

Next: End

BURNER DOES NOT IGNITE 1

CONTROL UNIT (PCB)

Next: End

HW OPERATION

Next: End

FAN DOES NOT RUN

CABLE - CONNECTING - STEP MOTOR

Next: End

FAN DOES NOT RUN

PUMP

Next: End

FAULT CODE OB

SYSTEM PRESSURE

Next: End

ERROR CODE OB

CONTROL UNIT (PCB)

Next: End

FAULT CODE OB

PUMP

Next: End

FAULT CODE OB

Next: End

FAULT CODE OB

HARNESS - CABLE X8

Next: End

FAULT CODE 0B

GAS COCK - HEATING WATER

Next: End

NO VOLTAGE TO GAS VALVE

SWITCH - PRESSURE

Next: End

OPEN CIRRCUIT NO POWER TO GAS VALVE

HARNESS - CABLE X8

Next: End

BURNER DOES NOT IGNITE

GAS TRAIN / CONTROL UNIT (PCB)

Next: End

BURNER DOES NOT IGNITE

SWITCH - PRESSURE TUBE

Next: End

BURNER DOES NOT IGNITE 4

GAS TRAIN

Next: End

BURNER DOES NOT IGNITE 1

FLUE

Next: End

BURNER DOES NOT IGNITE 2

TOP - VENTURI - TYPE 002

Next: End

BURNER DOES NOT IGNITE 1

HEAT EXCHANGER

Next: End

FAULT CODE 0B

CABLE - CONNECTING - STEP MOTOR

Next: End

HW OPERATION

Next: End

NO HW

CONTROL UNIT (PCB)

Next: End

STUCK IN HEATING

MOTOR - STEP

Next: End

HW OP

CONTROL UNIT (PCB)

Next: End

HW OP

CABLE - CONNECTING - STEP MOTOR

Next: End

FAN DOES NOT RUN 1

CONTROL UNIT (PCB)

Next: End

FAN DOES NOT RUN

SWITCH - FLOW

Next: End

FAN DOES NOT RUN 1 FAN DOES NOT RUN

MOTOR - STEP

Next: End

FAULT CODE 0B

CONTROL UNIT (PCB)

Next: End

FAULT CODE OB

SWITCH - FLOW

Next: End

FAULT CODE 0B

MOTOR - STEP

Next: End

NO POWER TO PUMP

CONTROL UNIT (PCB)

Next: End

PUMP NOT RUNNING

HARNESS PUMP

Next: End

STEPPER

CABLE - CONNECTING - STEP MOTOR

Next: End

NOT OPERATING FOR CH

CONTROL UNIT (PCB)

Next: End

WINDINGS OK BUT NO MOVEMENT

MOTOR - STEP

Next: End

APPLIANCES REACHES TEMP RADS COOL

VALVE - BYPASS / OVERFLOW

Next: End

APPLIANCE TO TEMP RADS COOL

Next: End

FAULT CODE OB

RETEST APPLIANCE

Next: End

SELF CHECK 2

CONTROL UNIT (PCB)

Next: End

NOT RECOGNISING CH DEMAND

CONTROL UNIT (PCB)

Next: End

ON WITH NO DEMAND

DIGITAL PROGRAMMER

Next: End

NOT RECOGNISING DEMAND

DIGITAL PROGRAMMER

Next: End

GAS INLET DHW DEMAMD

GAS INLET PRESSURE

Next: End

BOILER TEMP LOW RADS COOL

PUMP

Next: End

FAULT CODE 30

SENSOR - TEMPERATURE

Next: End

FAULT CODE 30

CONTROL UNIT (PCB)

Next: End

FAULT CODE F0

CONTROL UNIT (PCB)

Next: End

FAULT CODE F2

PUMP

Next: End

FAULT CODE F8

GAS TRAIN

Next: End

FAULT CODE F8

ELECTRODE - IGNITING

Next: End

FAULT CODE F8

CONTROL UNIT (PCB)

Next: End

FAULT CODE F9 FA FC 2

CONTROL UNIT (PCB)

Next: End

FAULT CODE FD FF

EMC FIELD

Next: End

FUSE FURTHER INVESTIGATION

FAN - RADIAL

Next: End

FAULT CODE F9

HARNESS - CABLE - FAN

Next: End

FAULT CODE F9 FA FC

HARNESS - CABLE X8

Next: End

FAULT CODE F9

CONTROL UNIT (PCB)

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

FAULT CODE E5

FAULT CODE RESET - RETEST APPLIANCE OPERATION

Next: End

FAULT CODE F2 2

PUMP

Next: End

FAULT CODE F2

HARNESS PUMP

Next: End

FAULT CODE F3

FAULT CODE RESET - RETEST APPLIANCE OPERATION

Next: End

FAULT CODE FD FF

FAULT CODE RESET - RETEST APPLIANCE OPERATION

Next: End

FUSE FURTHER INVESTIGATION

HARNESS PUMP

Next: End

FAULT CODE F2 4

CONTROL UNIT (PCB)

Next: End

FAULT CODE F2

HARNESS - CABLE X8

Next: End

FAULT CODE

Z REDIRECT

Next: End

NO DISPLAY

CONTROL UNIT (PCB)

Next: End

NO DISPLAY

Next: End

BLOCKED CAUSING PRESSURE RISE

HOSE - EXPANSION VESSEL

Next: End

BURNER BAFFLES OR NOISY

SIPHON

Next: End

BURNER BAFFLES OR NOISY

GAS TRAIN

Next: End

BURNER BAFFLES OR NOISY

BURNER GAUZE ASSEMBLY

Next: End

BURNER BAFFLES OR NOISY

HEAT EXCHANGER

Next: End

BURNER DOES NOT IGNITE 2

SIPHON

Next: End

BURNER DOES NOT IGNITE

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

CABLE - CONNECTING - GAS VALVE

Next: End

BOILER TEMP LOW RADS COOL

CONTROL UNIT (PCB)

Next: End

SERVICE MODE

Z REDIRECT

Next: End

BOILER TEMP LOW RADS COOL

BURNER GAUZE ASSEMBLY

Next: End

BOILER TEMP LOW RADS COOL

HEAT EXCHANGER

Next: End

FUSE FURTHER INVESTIGATION

Z REDIRECT

Next: End

FUSE FURTHER INVESTIGATION 1

Z REDIRECT

Next: End

ERROR CODE F7

CONTROL UNIT (PCB)

Next: End

FAULT CODE F7

SENSOR - WATER PRESSURE

Next: End

BLOCKED / RESTRICTED

SENSOR - WATER PRESSURE

Next: End

BLOCKED

BLOCK - HYDRAULIC

Next: End

ERROR CODE F7

SENSOR - WATER PRESSURE

Next: End

FAULT CODE F2

THERMOCOUPLE

Next: End

FAULT CODE F2

CONTROL UNIT (PCB)

Next: End

FAULT CODE F2

FAULT CODE F2 - OVERHEAT

Next: End

FAULT CODE E4

CONTROL UNIT (PCB)

Next: End

ERROR CODE E6

CONTROL UNIT (PCB)

Next: End

ERROR CODE E6

SENSOR - WATER PRESSURE

Next: End

RESTRICTED / BLOCKED

SENSOR - WATER PRESSURE

Next: End

RESTRICTED

BLOCK - HYDRAULIC

Next: End

FAULT CODE 58

CONTROL UNIT (PCB)

Next: End

SYSTEM PRESSURE FURTHER INVESTIGATION

Z REDIRECT

Next: End

NOT REGISTERING PRESSURE

SENSOR - WATER PRESSURE

Next: End

RESTRICTED OR BLOCKED

SENSOR - WATER PRESSURE

Next: End

RESTRICTED OR BLOCKED

BLOCK - HYDRAULIC

Next: End

POOR OUTPUT

MIXTURE DAMPER

Next: End

BOILER TEMP LOW RADS COOL

FAN - RADIAL

Next: End

BOILER TEMP LOW RADS COOL 2

CONTROL UNIT (PCB)

Next: End

FUSE FURTHER INVESTIGATION 2

CABLE - CONNECTING - GAS VALVE

Next: End

FUSE FURTHER INVESTIGATION

CONTROL UNIT - FUSE BLOWN

Next: End

NOT RECOGNISING CH DEMAND

Next: End

BURNER DOES NOT IGNITE

SIPHON

Next: End

BURNER DOES NOT IGNITE

GAS TRAIN

Next: End

BURNER DOES NOT IGNITE

BURNER GAUZE ASSEMBLY

Next: End

BURNER DOES NOT IGNITE

HEAT EXCHANGER

Next: End

BURNER DOES NOT IGNITE

ELECTRODE - IGNITING

Next: End

BURNER DOES NOT ESTABLISH

CONTROL UNIT (PCB)

Next: End

BURNER DOES NOT ESTABLISH

BURNER GAUZE ASSEMBLY

Next: End

BURNER DOES NOT ESTABLISH

HEAT EXCHANGER

Next: End

BURNER DOES NOT IGNITE 3

ELECTRODE - IGNITING

Next: End

NO CH

CONTROL UNIT (PCB)

Next: End

OVERHEAT 1

VALVE - BYPASS / OVERFLOW

Next: End

OVERHEAT F2

VALVE - BYPASS / OVERFLOW

Next: End

FAN DOES NOT RUN 2

CONTROL UNIT (PCB)

Next: End

FAN NOT RUNNING

HARNESS - CABLE X8

Next: End

DOES NOT IGNITE

SPARK GENERATOR - ZIG 2/12

Next: End

FAULT CODE F2

SYSTEM BLOCKAGE

Next: End

SELF CHECK

Next: End

BOILER FIRES NO DEMAND

CONTROL UNIT (PCB)

Next: End

BOILER SELF CHECK

FROST PROTECTION NORMAL OPERATION

Next: End

SELF CHECK

CONTROL UNIT (PCB)

Next: End

STICKING

MIXTURE DAMPER

Next: End

CONTAMINATED

FAN - RADIAL

Next: End

BURNER DOES NOT IGNITE 2

GAS TRAIN

Next: End

BURNER DOES NOT IGNITE 2

BURNER GAUZE ASSEMBLY

Next: End

BURNER DOES NOT IGNITE 2

HEAT EXCHANGER

Next: End

SELF CHECK

SERVICE MODE

Next: End

SELF CHECK

PUMP PURGE

Next: End

MOISTURE / BLOCKAGE IN OUT TEST POINT

GAS TRAIN

Next: End

FLOW SWITCH NOT MAKING

SENSOR - WATER PRESSURE

Next: End

BLOCKED / RESTRICTED FLOW SWITCH NOT MAKING

SENSOR - WATER PRESSURE

Next: End

BLOCKED / RESTRICTED FLOW SWITCH NOT MAKING

BLOCK - HYDRAULIC

Next: End

FAULT CODE F2

SENSOR - WATER PRESSURE

Next: End

BLOCKED / RESTRICTED FAULT CODE F2

SENSOR - WATER PRESSURE

Next: End

BLOCKED FAULT CODE F2

BLOCK - HYDRAULIC

Next: End

FAULT CODE F5

MIXTURE DAMPER

Next: End

ERROR CODE F5

FAN - RADIAL

Next: End

APS FAULT CODE F5

CONTROL UNIT (PCB)

Next: End

APS FAULT CODE F5

HARNESS - CABLE X8

Next: End

MOISTURE / RESTRICTION IN OUT TEST POINT

GAS TRAIN

Next: End

HW OPERATION

CONTROL UNIT (PCB)

Next: End

FAN DOES NOT RUN

CONTROL UNIT (PCB)

Next: End

FAN DOES NOT RUN

MOTOR - STEP

Next: End

FAULT CODE OB

SENSOR - WATER PRESSURE

Next: End

BLOCKED / RESTRICTED FAULT CODE OB

SENSOR - WATER PRESSURE

Next: End

BLOCKED FAULT CODE OB

BLOCK - HYDRAULIC

Next: End

ERROR CODE OB

PUMP

Next: End

FAULT CODE OB

HARNESS PUMP

Next: End

FAULT CODE OB

VALVE - BYPASS / OVERFLOW

Next: End

FAULT CODE 0B

VALVE - BYPASS / OVERFLOW

Next: End

FAULT CODE OB FAN DOES NOT RUN

VALVE - BYPASS / OVERFLOW

Next: End

FAULT CODE 0B FAN DOES NOT RUN

VALVE - BYPASS / OVERFLOW

Next: End

BLOCKING VOLTAGE TO GAS VALVE

SPARK GENERATOR - ZIG 2/12

Next: End

BURNER DOES NOT IGNITE

CABLE - CONNECTING - GAS VALVE / CONTROL UNIT (PCB)

Next: End

BURNER DOES NOT IGNITE

MIXTURE DAMPER

Next: End

BURNER DOES NOT IGNITE

FAN - RADIAL

Next: End

BURNER DOES NOT IGNITE

CONTROL UNIT (PCB)

Next: End

ERROR COD OB

CONTROL UNIT (PCB)

Next: End

ERROR CODE 0B

MOTOR - STEP

Next: End

NO HW OP

Next: End

HW OP

Next: End

NO HW OP

MOTOR - STEP

Next: End

BLOCKED HOSES / HEAT EX / PIPES FAN DOES NOT RUN

CIRCULATION ISSUE (APPLIANCE)

Next: End

BLOCKED HOSES / HEAT EX / PIPES

CIRCULATION ISSUE (APPLIANCE)

Next: End

PUMP NOT RUNNING

PUMP

Next: End

NO PERMANENT VOLTAGE TO STEPPER

CONTROL UNIT (PCB)

Next: End

WINDINGS GONE

MOTOR - STEP

Next: End

APPLIANCE TO TEMP RADS COOL

SYSTEM BLOCKAGE

Next: End

FAULT CODE OB

CONTROL UNIT (PCB)

Next: End

ON WITH NO DEMAND

CONTROL UNIT (PCB)

Next: End

NOT RECOGNISING HTG DEMAND

CONTROL UNIT (PCB)

Next: End

FAULT CODE 30

HARNESS - CABLE X8

Next: End

FAULT CODE 30

FAULT CODE RESET - RETEST APPLIANCE OPERATION

Next: End

FAULT CODE F0

FAULT CODE RESET - RETEST APPLIANCE OPERATION

Next: End

FAULT CODE F8

FAULT CODE RESET - RETEST APPLIANCE OPERATION

Next: End

FAULT CODE F8 2

GAS TRAIN

Next: End

FAULT CDOE F8

FAULT CODE RESET - RETEST APPLIANCE OPERATION

Next: End

FAULT CODE F9 FA FC

FAN - RADIAL

Next: End

FUSE FURTHER INVESTIGATION

HARNESS - CABLE - FAN

Next: End

HW DEMAND NOT RECOGNISED

CHARACTERISTIC TEST FROM HOT WATER OPERATION

Next: p3007

HW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM HOT WATER OPERATION

Next: p2700

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1286

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p1297

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p1299

BURNER IGNITES BUT BAFFLES OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p1301

BURNER RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1318

HEAT EXCHANGER FLUEWAYS RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1320

NO PRESSURE DROP OBSERVED

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: p1354

PRESSURE DROPS BELOW AN ACCEPTABLE MIMIMUM LEVEL

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: !p1356

GAS RATE INCORRECT @ 100% OUTPUT

Next: p1397

HOW TO SET APPLIANCE TO 100% OUTPUT

CHARACTERISTIC TEST FROM BOILER OUTPUT

Next: p1399

BURNER RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1412

HEAT EXCHANGER FLUEWAYS RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1414

WATER PRESSURE SENSOR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p1504

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p1506

APPLIANCE GOES TO FAULT CODE F2 BEFORE MAXIMUM FLOW TEMPERATURE REACHED

CHARACTERISTIC TEST FROM OBSERVATION CH - OVERHEAT OCCUR

Next: !p1547

TEMPERATURE EXCEEDS MAXIMUM FLOW TEMPERATURE 80°C AND CONTINUES TO FIRE

CHARACTERISTIC TEST FROM OBSERVATION CH - OVERHEAT OCCUR

Next: !p1549

WATER PRESSURE SENSOR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p1611

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p1613

LOW SYSTEM PRESSURE DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1701

WATER PRESSURE SENSOR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p1709

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p1711

MIXTURE DAMPER STICKING / NOT FUNCTIONING CORRECTLY

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p1773

FAN IMPELLORS CONTAMINATED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p1775

CH DEMAND NOT RECOGNISED

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS CH DEMAND

Next: p1804

CH DEMAND RECOGNISED BUT FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS CH DEMAND

Next: p1854

BURNER RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1996

HEAT EXCHANGER FLUEWAYS RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p1998

ELECTRODE GAP TO BURNER SURFACE INCORRECT

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS / ELECTRODE

Next: !p2000

BURNER RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2061

HEAT EXCHANGER FLUEWAYS RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2063

ELECTRODE GAP TO BURNER SURFACE INCORRECT

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS / ELECTRODE

Next: !p2065

INTERNAL BYPASS IN POOR CONDITION AND / OR NOT OPERATING CORRECTLY

CHARACTERISTIC TEST FROM INSPECTION HOSE AND INTERNAL BYPASS

Next: !p2131

BYPASS PIPE BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION HOSE AND INTERNAL BYPASS

Next: !p2106

SERV DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p2446

MIXTURE DAMPER STICKING / NOT FUNCTIONING CORRECTLY

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p2433

FAN IMPELLORS CONTAMINATED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p2435

BURNER RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2438

HEAT EXCHANGER FLUEWAYS RESTRICTED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

Next: !p2440

WATER PRESSURE SENSOR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p2477

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p2479

WATER PRESSURE SENSOR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p2544

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p2546

MIXTURE DAMPER STICKING / NOT FUNCTIONING CORRECTLY

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p2579

FAN IMPELLORS CONTAMINATED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p2581

VOLTAGE MISSING FROM PIN 2 OR 5

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: !p2707

VOLTAGE PRESENT ON PIN 2 AND 5 BUT ABSENT FROM ONE OR MORE OTHER PINS

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: p2803

VOLTAGE MISSING FROM PIN 2 OR 5

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: !p2805

WATER PRESSURE SENSOR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p2898

PUMP MANIFOLD BLOCKED

CHARACTERISTIC TEST FROM INSPECTION LOW PRESSURE SENSOR AND PUMP MANIFOLD

Next: !p2900

BYPASS BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: !p2925

INTERNAL BYPASS IN POOR CONDITION AND / OR NOT OPERATING CORRECTLY

CHARACTERISTIC TEST FROM INSPECTION HOSE AND INTERNAL BYPASS

Next: !p2927

BYPASS BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: !p2950

INTERNAL BYPASS IN POOR CONDITION AND / OR NOT OPERATING CORRECTLY

CHARACTERISTIC TEST FROM INSPECTION HOSE AND INTERNAL BYPASS

Next: !p2952

MIXTURE DAMPER STICKING / NOT FUNCTIONING CORRECTLY

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p2979

FAN IMPELLORS CONTAMINATED AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FAN AND DAMPER

Next: !p2981

VOLTAGE PRESENT ON PIN 2 AND 5 BUT ABSENT FROM ONE OR MORE PINS

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: p3001

VOLTAGE MISSING FROM PIN 2 OR 5

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: !p3003

VOLTAGE PRESENT ON PIN 2 AND 5 BUT ABSENT FROM ONE OR MORE OTHER PINS

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: p3018

VOLTAGE MISSING FROM PIN 2 OR 5

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: !p3084

VOLTAGE PRESENT ON PIN 2 AND 5 BUT ABSENT FROM ONE OR MORE OTHER PINS

CHARACTERISTIC TEST FROM VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

Next: p3086

APPLIANCE REACHES TEMPERATURE BUT RADIATORS REMAIN COOL OR DO NOT HEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p362

APPLIANCE AND RADIATORS FAIL TO REACH SET TEMPERATURE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p438

PUMP RUNS CONTINUOUSLY OR APPLIANCE ATTEMPTS TO FIRE AFTER SELF CHECK COMPLETE

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p2410

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1267

DELAY IN RETURNING TO STANDING PRESSURE

CHARACTERISTIC TEST FROM PRESSURE STANDING RETURN

Next: !p660

APPLIANCE DOES NOT RESET - FAULT CODE REMAINS THE SAME

CHARACTERISTIC TEST FROM PRESSURE STANDING RETURN

Next: p662

DISPLAY DOES NOT OPERATE CORRECTLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p9

25/02/2020 09:01:43 2002_1_50_1 12/03/2020 13:56:34

25/02/2020 09:59:26

Next: End

VOLTAGE AT PUMP

CH TEMPERATURE CONTR

Next: !p1091, f1092

VOLTAGE PUMP AT PCB

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX
REMOVE CONNECTOR 20 FROM THE PCB AND MAKE SAFE

Next: !p1093, !f1094

INSPECTION ELECTRODE

REMOVE ELECTRODE ASSEMBLY FROM THE BURNER DOOR
DISCONNECT LEAD FROM THE SPARK GENERATOR

Next: p1114, !f1115

RESISTANCE TEMPERATURE LIMITER AND HARNESS

ENSURE APPLIANCE IS COOL
REMOVE CONNECTOR X8 FROM THE PCB

Next: !p1198, f1199

RESISTANCE TEMPERATURE LIMITER

REMOVE 1 X SPADE CONNECTOR FROM THE TEMPERATURE LIMITER

Next: !p1200, !f1201

RESISTANCE FUSE (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p1274, f1275

FUSE FURTHER INVESTIGATION (PCB FUSE)

Next: !p1480, !f1481

FUSE FURTHER INVESTIGATION (FUSED SPUR)

Next: !p1482, !f1483

INSPECTION CONDENSATE PIPE

Next: !p1304, !f1305

INSPECTION CONDENSATE PIPE

Next: !p1323, !f1324

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p1361, !f1362

VOLTAGE SOCKET AND SEE

{GAINPCBACS}

Next: !p1553, !f1554

OBSERVATION SYSTEM PRESSURE

Next: p1601, !f1614

VOLTAGE LOW PRESSURE SENSOR - RETURN

{GAINPCBACS}

Next: p1498, f1499

VOLTAGE LOW PRESSURE SENSOR - SEND

Next: p1507, !f1508

INSPECTION WATER PRESSURE SENSOR AND PUMP MANIFOLD

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE WATER PRESSURE SENSOR FROM THE PUMP MANIFOLD

Next: !p1502, ?1503, ?1505

VOLTAGE LOW PRESSURE SENSOR - SEND

Next: p1604, !f1605

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p2098, !f2102

INSPECTION DIP SWITCHES

GAIN ACCESS TO THE DISPLAY PCB
RELEASE THE 2 CLIPS ON THE FACIA AND LOWER THE PANEL

Next: !p1698, !f1699

INSPECTION WATER PRESSURE SENSOR AND PUMP MANIFOLD

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE WATER PRESSURE SENSOR FROM THE PUMP MANIFOLD

Next: !p1707, ?1708, ?1710

RESISTANCE GAS VALVE - FUSE INVESTIGATION

REMOVE ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p1785, !f1786

OBSERVATION IS AN INTERNAL CLOCK / PROGRAMMER FITTED

Next: p3105, !f3109

OBSERVATION SYSTEM PRESSURE

Next: p2469, !f2473

INSPECTION CONDENSATE PIPE

Next: !p1977, !f1978

RESISTANCE APS (REST POSITION)

REMOVE THE LEADS FROM THE APS

Next: !p2148, f2151

RESISTANCE APS WITH TUBE DISCONNECTED

REMOVE THE LEADS FROM THE APS
DISCONNECT THE TUBE FROM THE APS

Next: p2152, !f2153

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}
CH T

Next: p2380, !f2592

DISCONNECT EXTERNAL CONTROLS

REMOVE CONNECTOR 56 FROM THE PCB AND MAKE SAFE
ENSURE NO DEMANDS

Next: !p2415, f2416

OBSERVATION IS AN INTERNAL CLOCK / PROGRAMMER FITTED

Next: p3099, !f3103

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM THE FLOW SENSOR

Next: !p2423, !f2424

PUMP PURGE MODE RESET

Next: !p2451, !f2452

INSPECTION WATER PRESSURE SENSOR AND PUMP MANIFOLD

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE WATER PRESSURE SENSOR FROM THE PUMP MANIFOLD

Next: !p2475, ?2476, ?2478

INSPECTION WATER PRESSURE SENSOR AND PUMP MANIFOLD

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE WATER PRESSURE SENSOR FROM THE PUMP MANIFOLD

Next: !p2542, ?2543, ?2545

RESISTANCE APS AND HARNESS (REST POSITION)

REMOVE CONNECTOR X8 FROM THE PCB

Next: p2563, f2584

RESISTANCE APS (REST POSITION)

REMOVE THE LEADS FROM THE APS

Next: !p2585, f2586

RESISTANCE APS WITH TUBE DISCONNECTED

REMOVE THE LEADS FROM THE APS
DISCONNECT THE TUBE FROM THE APS

Next: p2587, !f2588

RESISTANCE FLOW SWITCH (0B FAULT CODE)

CH TEMPERATURE CONTROL TURNED TO MAX
DISCONNECT INLINE CONNECTOR TO FLOW SWITCH

Next: p2890, f2891

OBSERVATION SYSTEM PRESSURE

Next: p2892, !f2893

INSPECTION WATER PRESSURE SENSOR AND PUMP MANIFOLD

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE WATER PRESSURE SENSOR FROM THE PUMP MANIFOLD

Next: !p2896, ?2897, ?2899

VOLTAGE AT PUMP

CH TEMPERATURE CONTR

Next: !p2903, f2904

VOLTAGE PUMP AT PCB

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX
REMOVE CONNECTOR 20 FROM THE PCB AND MAKE SAFE

Next: !p2905, !f2906

VOLTAGE GAS VALVE AT PCB - SPARK GENERATOR DISCONNECTED

{GAINPCBACS}
CH T

Next: !p2958, f2959

AIR PRESSURE SWITCH PROVING

DISCONNECT LEADS FRO

Next: p2960, !f2961

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR FROM GAS VALVE

Next: !p2966, !f2967

VOLTAGE PUMP AT PCB

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX
REMOVE CONNECTOR 20 FROM THE PCB AND MAKE SAFE

Next: p3069, !f3070

VOLTAGE DIGITAL PROGRAMMER - NO DEMAND

GAIN ACCESS TO THE D

Next: !p3111, !f3112

VOLTAGE DIGITAL PROGRAMMER - CH DEMAND

GAIN ACCESS TO THE D

Next: !p3115, !f3122

RESISTANCE FLOW TEMPERATURE SENSOR & HARNESS

REMOVE CONNECTOR X8 FROM THE PCB

Next: p529, f530

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM THE FLOW SENSOR

Next: !p531, !f532

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p586, !f587

RESET APPLIANCE - FAULT CODE F2

ENSURE NO DEMANDS ARE PRESENT
ENSURE BOILER IS COOL

Next: p618, f1197

INSTALLATION TIGHTNESS TEST

Next: p655, !f656

VOLTAGE FAN ASSEMBLY (MAINS VOLTAGE)

{GAINPCBACS}
REMOVE CONNECTOR 100 FROM THE PCB AND MAKE SAFE

Next: p669, !f670

OBSERVATION - STRONG INTERFERENCE (EMC) FIELD PRESENT

Next: p1164, !f680

RESISTANCE FAN AND HARNESS - FUSE INVESTIGATION

REMOVE CONNECTOR 100 FROM THE PCB

Next: p687, f688

RESISTANCE FAN - FUSE INVESTIGATION

REMOVE MAINS VOLTAGE CONNECTOR FROM THE FAN ASSEMBLY

Next: !p757, !f690

RESISTANCE PUMP - FUSE INVESTIGATION

REMOVE WIRING CONNECTIONS AT PUMP

Next: !p1179, !f1178

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p1037, !f1294

PUMP LIMPET TEST

Next: p1289, !f1292

INSPECTION ELECTRODE

REMOVE ELECTRODE ASSEMBLY FROM THE BURNER DOOR
DISCONNECT LEAD FROM THE SPARK GENERATOR

Next: p1080, !f1081

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1082, !f1083

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1116, !f1117

INSPECTION ELECTRODE

REMOVE ELECTRODE ASSEMBLY FROM THE BURNER DOOR
DISCONNECT LEAD FROM THE SPARK GENERATOR

Next: p1165, !f1166

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1167, !f1168

INSPECTION EXTERNAL BYPASS

Next: p630, !f1225

FAULT CODES

Next: !p1268, !f1269

RESISTANCE FUSE PCB

REMOVE THE FUSE FROM THE PCB

Next: !p1272, f1273

INSPECTION EXPANSION VESSEL PRESSURE

GAIN ACCESS TO THE EXPANSION VESSEL
APPLIANCE DRAINED AND DISCHARGED

Next: !p1287, !f1288

INSPECTION EXTERNAL BYPASS

Next: p3081, !f3095

INSPECTION CONDENSATE SYPHON

GAIN ACCESS TO CONDENSATE SYPHON

Next: p1928, f1976

INSPECTION CONDENSATE SYPHON

GAIN ACCESS TO CONDENSATE SYPHON

Next: p1321, f1322

INSPECTION CONDENSATE SYPHON

GAIN ACCESS TO CONDENSATE SYPHON

Next: p1302, f1303

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p1306, !f1307

INSPECTION FLUE

Next: p1308, !f1309

INSPECTION VENTURI

Next: p1310, !f1541

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER MODULE UNIT ASSEMBLY

Next: !p1316, ?1317, ?1319

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p1325, !f1326

INSPECTION ELECTRODE

REMOVE ELECTRODE ASSEMBLY FROM THE BURNER DOOR
DISCONNECT LEAD FROM THE SPARK GENERATOR

Next: p2036, !f2071

OBSERVATION SPARKING OCCURS

DISCONNECT THE IGNIT

Next: p1345, f2379

PRESSURE GAS INLET DROP

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p1989, ?1353, ?1355

INSPECTION FLUE

Next: p1357, !f1358

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR 35 FROM THE PCB

Next: p1359, f1360

INSPECTION VENTURI

Next: p2430, !f2441

APPLIANCE OUTPUT

SET APPLIANCE TO 100% OUTPUT

Next: !p1395, ?1396, ?1398

INSPECTION FLUE

Next: p1402, !f1403

SERVICE MODE

Next: !p1400, !f1401

INSPECTION VENTURI

Next: p1762, !f1771

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER MODULE UNIT ASSEMBLY

Next: !p1778, ?1411, ?1413

INSPECTION CH CONTROL SPINDLE

GAIN ACCESS TO THE DISPLAY PCB
RELEASE THE 2 CLIPS ON THE FACIA AND LOWER THE PANEL

Next: p1449, !f1479

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p439, !f1478

OBSERVATION ADJUST SYSTEM PRESSURE

Next: !p1500, f1501

RESISTANCE LOW PRESSURE SENSOR HARNESS

REMOVE CONNECTOR FROM THE LOW WATER PRESSURE SENSOR

Next: !p1509, !f1510

OBSERVATION CH - OVERHEAT OCCUR

CH TEMPERATURE CONTROL TURNED TO MAX

Next: p1545, ?1546, ?1548

OBSERVATION PUMP OVERRUN FOR OVERHEAT

CH TEMPERATURE CONTROL TURNED TO MAX

Next: !p1550, !f1551

VOLTAGE LOW PRESSURE SENSOR - RETURN

{GAINPCBACS}

Next: !p1602, f1603

RESISTANCE LOW PRESSURE SENSOR HARNESS

REMOVE CONNECTOR FROM THE LOW WATER PRESSURE SENSOR

Next: p1606, !f1607

INSPECTION WATER PRESSURE SENSOR AND PUMP MANIFOLD

APPLIANCE DRAINED AND DISCHARGED
REMOVE THE WATER PRESSURE SENSOR FROM THE PUMP MANIFOLD

Next: !p1608, ?1610, ?1612

TEMPERATURE DIFFERENTIAL CH

CH TEMPERATURE CONTROL SET TO MAX
ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPES

Next: p1544, f1672

OBSERVATION SYSTEM PRESSURE - LOW PRESSURE

Next: p1702, f1706

SYSTEM PRESSURE FURTHER INVESTIGATION

THE SYSTEM PRESSURE

Next: !p1704, !f1705

INSPECTION FAN AND DAMPER

REMOVE BURNER MODULE ASSEMBLY AND SEPARATE FAN SECTION FROM BURNER DOOR ARM

Next: p1404, ?1772, ?1774

BYPASS EXTERNAL CONTROLS

CH TEMPERATURE CONTR

Next: !p1849, f1850

RESISTANCE INTERNAL CLOCK / TIMESWITCH

GAIN ACCESS TO THE D

Next: !p2087, !f2088

RESISTANCE FLOW SWITCH

CH TEMPERATURE CONTROL TURNED TO MAX
DISCONNECT INLINE CONNECTOR TO FLOW SWITCH

Next: p1855, f1856

RESISTANCE FLOW SWITCH HARNESS

DISCONNECT INLINE CONNECTOR TO FLOW SWITCH

Next: p1861, !f1862

PUMP LIMPET TEST

Next: p2800, !f2810

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM THE FLOW SENSOR

Next: p2144, !f2145

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX
REMOVE CONNECTOR 35 FROM THE PCB AND MAKE SAFE

Next: p1341, f2957

INSPECTION VENTURI

Next: p1990, !f1991

INSPECTION ELECTRODE

REMOVE ELECTRODE ASSEMBLY FROM THE BURNER DOOR
DISCONNECT LEAD FROM THE SPARK GENERATOR

Next: p1992, !f1993

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS / ELECTRODE

REMOVE BURNER MODULE UNIT ASSEMBLY

Next: !p1994, ?1995, ?1997, ?1999

RESISTANCE SPARK GENERATOR

REMOVE THE LEADS FROM THE SPARK GENERATOR

Next: p2076, !f2086

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS / ELECTRODE

REMOVE BURNER MODULE UNIT ASSEMBLY

Next: !p2059, ?2060, ?2062, ?2064

RESISTANCE HARNESS SPARK GENERATOR

REMOVE CONNECTOR 54/11 FROM THE PCB

Next: p2058, !f2085

INSPECTION HOSE AND INTERNAL BYPASS

APPLIANCE DRAINED AND DISCHARGED

Next: !p2407, ?2103, ?2105

RESISTANCE APS AND HARNESS (REST POSITION)

REMOVE CONNECTOR X8 FROM THE PCB

Next: !p2146, f2147

INSPECTION APS TUBE

REMOVE APS TUBE

Next: p2453, !f2456

RESISTANCE HARNESS SPARK GENERATOR

REMOVE CONNECTOR 54/11 FROM THE PCB

Next: p2402, !f2403

INSPECTION ELECTRODE

REMOVE ELECTRODE ASSEMBLY FROM THE BURNER DOOR
DISCONNECT LEAD FROM THE SPARK GENERATOR

Next: !p2404, !f2405

INSPECTION DIP SWITCHES

GAIN ACCESS TO THE DISPLAY PCB
RELEASE THE 2 CLIPS ON THE FACIA AND LOWER THE PANEL

Next: p2411, !f2412

OBSERVATION FLOW TEMPERATURE DISPLAYED (FROST PROTECTION)

ENSURE NO DEMANDS

Next: p2413, f2414

TEMPERATURE FLOW PIPE (FROST PROTECTION)

ATTACH A TEMPERATURE CLAMP TO THE FLOW PIPE

Next: !p2421, f2422

RESISTANCE INTERNAL CLOCK / TIMESWITCH

GAIN ACCESS TO THE D

Next: !p2419, !f2420

INSPECTION FAN AND DAMPER

REMOVE BURNER MODULE ASSEMBLY AND SEPARATE FAN SECTION FROM BURNER DOOR ARM

Next: p2431, ?2432, ?2434

INSPECTION BURNER / HEAT EXCHANGER FLUEWAYS

REMOVE BURNER MODULE UNIT ASSEMBLY

Next: !p2436, ?2437, ?2439

OBSERVATION WHICH MODE IS APPLIANCE IN

Next: p2447, f2450

SERVICE MODE RESET

Next: !p2448, !f2449

INSPECTION VENTURI

Next: !p2454, !f2455

OBSERVATION ADJUST SYSTEM PRESSURE

Next: p1857, f2474

OBSERVATION ADJUST SYSTEM PRESSURE

Next: p622, f2541

AIR PRESSURE SWITCH PROVING

DISCONNECT LEADS FRO

Next: p2564, !f2565

RESISTANCE APS HARNESS

REMOVE CONNECTOR X8 FROM THE PCB

Next: p2566, !f2567

INSPECTION APS TUBE

REMOVE APS TUBE

Next: p2568, !f2569

INSPECTION GAS VALVE

REMOVE THE APS TUBE FROM THE GAS VALVE TEST POINT (OUT)

Next: p2570, !f2571

INSPECTION FLUE

Next: p2572, !f2573

INSPECTION VENTURI

Next: p2574, !f2575

INSPECTION FAN AND DAMPER

REMOVE BURNER MODULE ASSEMBLY AND SEPARATE FAN SECTION FROM BURNER DOOR ARM

Next: p2576, ?2578, ?2580

INSPECTION HEAT EXCHANGER FLUEWAYS

THE BURNER MODULE ASSEMBLY SHOULD ALREADY BE REMOVED FROM THE PREVIOUS TEST

Next: !p2582, !f2583

INSPECTION APS TUBE

REMOVE APS TUBE

Next: !p2589, !f2590

DOES THE APPLIANCE USE THE INTEGRAL DIVERTER VALVE FOR DHW

Next: p2701, !f2702

VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

{GAINPCBACS}

Next: p2703, ?2706, ?3016

VOLTAGE DC STEPPER MOTOR VARIATION

Next: p3012, !f3015

VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

{GAINPCBACS}

Next: p2801, ?2802, ?2804

VOLTAGE DC STEPPER MOTOR VARIATION

Next: p3021, !f3032

RESISTANCE HARNESS STEPPER MOTOR

REMOVE THE CONNECTOR FROM THE STEPPER MOTOR

Next: !p2806, !f2807

RESISTANCE FLOW SWITCH HARNESS

DISCONNECT INLINE CONNECTOR TO FLOW SWITCH

Next: p2912, !f2913

OBSERVATION ADJUST SYSTEM PRESSURE

Next: p2894, f2895

OBSERVATION PUMP RUNS

CH TEMPERATURE CONTROL TURNED TO MAX

Next: p2901, f2902

PUMP LIMPET TEST

Next: p2907, !f2908

INSPECTION EXTERNAL BYPASS

Next: p2909, !f2910

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p2916, !f2917

OBSERVATION DOES FAULT CODE 0B REOCCUR

Next: !p3097, !f3098

VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

{GAINPCBACS}

Next: p2986, ?3000, ?3002

INSPECTION HOSE AND INTERNAL BYPASS

APPLIANCE DRAINED AND DISCHARGED

Next: p2923, ?2924, ?2926

OBSERVATION DIVERTER MOVEMENT

APPLIANCE DRAINED AN

Next: !p3053, !f3054

INSPECTION HOSE AND INTERNAL BYPASS

APPLIANCE DRAINED AND DISCHARGED

Next: p2948, ?2949, ?2951

OBSERVATION DIVERTER MOVEMENT

APPLIANCE DRAINED AN

Next: !p3036, !f3037

RESISTANCE APS HARNESS

REMOVE CONNECTOR X8 FROM THE PCB

Next: p2962, !f2963

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR 35 FROM THE PCB

Next: p2964, f2965

INSPECTION APS TUBE

REMOVE APS TUBE

Next: p2968, !f2969

INSPECTION GAS VALVE

REMOVE THE APS TUBE FROM THE GAS VALVE TEST POINT (OUT)

Next: p2970, !f2971

INSPECTION FLUE

Next: p2972, !f2973

INSPECTION VENTURI

Next: p2974, !f2975

INSPECTION FAN AND DAMPER

REMOVE BURNER MODULE ASSEMBLY AND SEPARATE FAN SECTION FROM BURNER DOOR ARM

Next: p2976, ?2978, ?2980

INSPECTION HEAT EXCHANGER FLUEWAYS

THE BURNER MODULE ASSEMBLY SHOULD ALREADY BE REMOVED FROM THE PREVIOUS TEST

Next: !p2982, !f2983

VOLTAGE DC STEPPER MOTOR VARIATION

Next: p3038, !f3049

RESISTANCE HARNESS STEPPER MOTOR

REMOVE THE CONNECTOR FROM THE STEPPER MOTOR

Next: !p3005, !f3006

DOES THE APPLIANCE USE THE INTEGRAL DIVERTER VALVE FOR DHW

Next: p3008, !f3009

VOLTAGE LS

{GAINPCBACS}
HW DEMAND

Next: !p3010, !f3011

OBSERVATION DIVERTER MOVEMENT

APPLIANCE DRAINED AN

Next: !p3013, !f3014

RESISTANCE HARNESS STEPPER MOTOR

REMOVE THE CONNECTOR FROM THE STEPPER MOTOR

Next: !p3019, !f3020

RESISTANCE FLOW SWITCH MANUALLY MADE

APPLIANCE DRAINED AN

Next: p2947, !f3033

RESISTANCE FLOW SWITCH MANUALLY MADE

APPLIANCE DRAINED AN

Next: p2918, !f3050

VOLTAGE AT PUMP

CH TEMPERATURE CONTR

Next: !p3071, !f3072

VOLTAGE DC STEPPER MOTOR PERMANENT AT PCB

{GAINPCBACS}

Next: p3082, ?3083, ?3085

VOLTAGE DC STEPPER MOTOR VARIATION

Next: p3089, !f3090

RESISTANCE HARNESS STEPPER MOTOR

REMOVE THE CONNECTOR FROM THE STEPPER MOTOR

Next: !p3087, !f3088

OBSERVATION DIVERTER MOVEMENT

APPLIANCE DRAINED AN

Next: p3091, !f3092

INSPECTION INTERNAL BYPASS

APPLIANCE DRAINED AN

Next: !p3093, !f3094

OBSERVATION WHICH TYPE OF INTERNAL CLOCK / PROGRAMMER IS FITTED

Next: p2417, f3104

OBSERVATION WHICH TYPE OF INTERNAL CLOCK / PROGRAMMER IS FITTED

Next: p1851, f3110

OBSERVATION SYSTEM PRESSURE

Next: p1036, !f1293

OBSERVATION SYSTEM PRESSURE

Next: p1418, !f1447

PUMP LIMPET TEST

Next: p441, !f442

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM THE FLOW SENSOR

Next: p1394, !f1417

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p533, !f534

OBSERVATION SYSTEM PRESSURE

Next: p2509, !f2540

OBSERVATION PUMP RUNS

CH TEMPERATURE CONTROL TURNED TO MAX

Next: p624, f1090

PUMP LIMPET TEST

Next: p1202, !f631

RESISTANCE FLOW TEMPERATURE SENSOR

REMOVE CONNECTORS FROM THE FLOW SENSOR

Next: p1662, !f1671

PRESSURE STANDING RETURN

ATTACH PRESSURE GAUG

Next: !p657, ?659, ?661

INSPECTION ELECTRODE

REMOVE ELECTRODE ASSEMBLY FROM THE BURNER DOOR
DISCONNECT LEAD FROM THE SPARK GENERATOR

Next: p663, !f664

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p665, !f666

VOLTAGE FAN CONTROL

REMOVE 1 X CONNECTOR

Next: p671, !f708

RESISTANCE FAN CONTROL HARNESS

REMOVE FAN CONTROL CONNECTOR FROM FAN ASSEMBLY

Next: p673, !f707

RESISTANCE POWER CABLE FAN ASSEMBLY

REMOVE CONNECTOR 100 FROM THE PCB
DISCONNECT THE FAN POWER CONNECTOR FROM THE FAN ASSEMBLY

Next: !p675, !f705

RESISTANCE PUMP AND HARNESS - FUSE INVESTIGATION

REMOVE CONNECTOR 20 FROM THE PCB

Next: p691, f897

RESISTANCE GAS VALVE AND HARNESS - FUSE INVESTIGATION

REMOVE CONNECTOR 35 FROM THE PCB

Next: !p1788, f1784

VOLTAGE MAINS POWER INPUT AT PCB

{GAINPCBACS}

Next: p1270, f1271

System Information

Total Tests: 558

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control