XSol Diagnostic System

JOHNSON & STARLEY QUANTEC 30C

GLOBALLY REPLACED

APPLIANCE APPEARS SATISFACTORY

JOHNSON & STARLEY QUANTEC 30C

OBSERVATION DISPLAY OPERATES

OBSERVATION BOILER STANDBY

REMOVE BOILER CASE IF YOU HAVE NOT ALREADY DONE SO

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

E01 - IGNITION LOCKOUT - DUMMY? GO TO IGNITION

Next: &nff, !f302

E02 - FALSE FLAME LOCKOUT

Next: &nff, f38

E03 - OVERHEAT LOCKOUT

Next: &nff, f39

E05 - FAN FAULT

Next: &nff, f40

E08 - FLAME CIRCUIT FAILURE

Next: &nff, f41

E09 - GAS VALVE FEED BACK ERROR

Next: &nff, f42

E12 - EEPROM LOCKOUT

Next: &nff, f43

E15 - FLOW/RETURN SENSOR CALIBRATION CHECK

Next: &nff, f44

E16 | E17 | E18 - SENSOR STUCK LOCKOUT

Next: &nff, f45

E21 - ADC LOCKOUT

Next: &nff, f46

E33 - RETURN THERMISTOR FAULT

Next: &nff, f47

E35 - FLOW THERMISTOR FAULT

Next: &nff, f48

F07 - EXHAUST SENSOR FAULT

Next: &nff, f49

F34 - LOW POWER SUPPLY FROM MAINS

Next: &nff, f50

F37 - LOW WATER PRESSURE

Next: &nff, f407

F39 - OUTDOOR SENSOR ERROR

Next: &nff, f52

F40 - WATER PRESSURE TOO HIGH

Next: &nff, f53

F47 - WATER PRESSURE SENSOR

Next: &nff, f54

F52 - DHW SENSOR LOCKOUT

Next: &nff, f159

F53 - FLUE TEMPERATURE SENSOR LOCKOUT

Next: &nff, f56

F81 - DRIFT TEST WAITING

Next: &nff, f57

F82 - SPRAYAWAY LEVEL ALARM

Next: &nff, !f58

FUSE FURTHER INVESTIGATION (DUMMY)

Next: &nff, f60

OBSERVATION DHW FLOW RATE

Next: &123, f115

OBSERVATION PUMP RUNS DHW DEMAND

Next: &129, f124

OBSERVATION FAN RUNS DHW DEMAND

Next: &140, f130

INFORMATION BOILER SETUP

BEFORE CONTINUING FA

Next: &11, !f132

OPERATION DHW

Next: &206, ?285, ?289, ?291, ?773, ?815

OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: &205, ?141, ?143, ?145, ?147

OBSERVATION PUMP RUNS CH DEMAND

Next: &139, f762

OPERATION CH

Next: &208, ?483, ?485, ?528

OBSERVATION PUMP OVERRUN

Next: &nff, !f301

INFORMATION BOILER DIAGNOSTICS

Next: &nff, !f656

F13 - REMOTE RESET LOCKOUT

INTENTIONALLY BLANK - HEADER FOR FAULT CODE

Next: &nff, f710

F50 - HE DHW OUTLET SENSOR

INTENTIONALLY BLANK - HEADER FOR FAULT CODE

Next: &nff, f712

OBSERVATION BOILER STANDBY - FIRING WITH NO DEMAND

TAP OR WATER LEAK

Next: End

OBSERVATION BOILER STANDBY - FIRING WITH NO DEMAND

HEATING CONTROLS (FIRING NO DEMAND)

Next: End

OBSERVATION BOILER STANDBY - FIRING WITH NO DEMAND

SENSOR - TEMPERATURE (FLOW)

Next: End

OBSERVATION BOILER STANDBY - FIRING WITH NO DEMAND

SENSOR - FLOW

Next: End

OBSERVATION DHW FLOW RATE

WATER SUPPLY

Next: End

OBSERVATION BOILER STANDBY - FIRING WITH NO DEMAND - DHW FLOW SWITCH

HARNESS X5-X7

Next: End

OBSERVATION DHW FLOW RATE - ISOLATION VALVE

PACK - DHW VALVE

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

OBSERVATION DHW FLOW RATE

DHW RESTRICTOR

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

HARNESS X5-X7

Next: End

INFORMATION BOILER SETUP

Z REDIRECT

Next: End

OBSERVATION FAN RUNS DHW DEMAND

SENSOR - TEMPERATURE (FLOW)

Next: End

OBSERVATION FAN RUNS DHW DEMAND

SENSOR - TEMPERATURE - DHW

Next: End

OBSERVATION DHW FLOW RATE - FILTER

PACK - DHW VALVE

Next: End

OBSERVATION FAN RUNS DHW DEMAND

SENSOR - TEMPERATURE (RETURN)

Next: End

F52 - OPEN CIRCUIT

HARNESS X5-X7

Next: End

F53 - FAULT PRESENT

SENSOR - FLUE

Next: End

F53

HARNESS X5-X7

Next: End

E35

SENSOR - TEMPERATURE (FLOW)

Next: End

E21

PCB

Next: End

E33

SENSOR - TEMPERATURE (RETURN)

Next: End

OBSERVATION BURNER IGNITES - NO SPARKING

PCB

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

LEAD - SPARK

Next: End

OBSERVATION BURNER IGNITES - SPARKING NO IGNITION

TRAP - CONDENSATE

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

COMPENSATION TUBE

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

HARNESS X4

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION - NO VOLTAGE TO GAS VALVE

PCB

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

FAN - COMBUSTION

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

INJECTOR

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

ELECTRODE - SPARK DETECTION

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

FLUE

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

BURNER

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION

HEAT EXCHANGER

Next: End

OBSERVATION BURNER IGNITION - DOES NOT ESTABLISH

ELECTRODE - SPARK DETECTION

Next: End

FAULT CODES DHW OP 2

Z REDIRECT

Next: End

OPERATION DHW - DHW COOL RADS HEAT

PCB

Next: End

OPERATION DHW - DHW COOL RADS HEAT

HARNESS X10

Next: End

OBSERVATION PUMP OVERRUN

PCB

Next: End

E01

Z REDIRECT

Next: End

F47 - SHORTING TO EARTH

HARNESS X5-X7

Next: End

F47 - NO VOLTAGE TO PRESSURE SENSOR

PCB

Next: End

F47 - OPEN CIRCUIT

HARNESS X5-X7

Next: End

F53 - FAULT ABSENT

THERMAL FUSE

Next: End

F53 - FAULT ABSENT

SENSOR - FLUE

Next: End

F07 - FAULT PRESENT

SENSOR - FLUE

Next: End

F07 - FAULT ABSENTF

SENSOR - FLUE

Next: End

F07 - FAULT ABSENT

THERMAL FUSE

Next: End

F40 - FAULT PRESENT

SYSTEM PRESSURE (TOO HIGH)

Next: End

F34

Next: End

F40 - FAULT PRESENT

SENSOR - PRESSURE - CENTRAL HEATING

Next: End

F40 - FAULT ABSENT

SYSTEM PRESSURE (TOO HIGH)

Next: End

F40 - FAULT ABSENT

SENSOR - PRESSURE - CENTRAL HEATING

Next: End

FAULT CODES 2

Z REDIRECT

Next: End

E05 - HALL

HARNESS X4

Next: End

E05 - FAN DOES NOT RUN

HARNESS X4

Next: End

E05 - FAN

HARNESS X11

Next: End

E05 - LOW VOLTAGES TO FAN

PCB

Next: End

E05 - MAINS VOLTAGE TO FAN

PCB

Next: End

F81

SENSOR - TEMPERATURE (FLOW)

Next: End

E02

LEAD - SPARK

Next: End

E02

WIRING

Next: End

F39 - FAULT PRESENT

HARNESS X3

Next: End

F37 - FAULT PRESENT

SYSTEM PRESSURE

Next: End

F37 - FAULT ABSENT

SYSTEM PRESSURE

Next: End

F37 - FAULT ABSENT

SENSOR - PRESSURE - CENTRAL HEATING

Next: End

OBSERVATION BURNER IGNITES - BAFFLES

TRAP - CONDENSATE

Next: End

OBSERVATION BURNER IGNITES - BAFFLES

COMPENSATION TUBE

Next: End

OBSERVATION BURNER IGNITES - BAFFLES

INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

FAN - COMBUSTION

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

FLUE

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

INJECTOR

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

HEAT EXCHANGER

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

BURNER

Next: End

OPERATION DHW - DHW TOO HOT

SENSOR - TEMPERATURE - DHW

Next: End

FUSE INVESTIGATION

PUMP HEAD

Next: End

FUSE INVESTIGATION

MOTOR - ACTUATOR - 3-WAY VALVE

Next: End

E03 - DOES NOT RESET

SENSOR - TEMPERATURE (RETURN)

Next: End

E09

HARNESS X4

Next: End

E08

PCB

Next: End

E12

PCB

Next: End

OPERATION CH

EXPANSION VESSEL

Next: End

OPERATION CH - UP TO TEMP RADS COOL

PCB

Next: End

OPERATION CH - UP TO TEMP RADS COOL

HARNESS X10

Next: End

OPERATION CH - UP TO TEMP RADS COOL

INSERT - 3-WAY VALVE

Next: End

OPERATION CH - UP TO TEMP RADS COOL

Next: End

OPERATION CH - DOES NOT RAMP UP

SENSOR - TEMPERATURE (FLOW)

Next: End

OPERATION CH - DOES NOT RAMP UP

SENSOR - TEMPERATURE (RETURN)

Next: End

OPERATION CH - DOES NOT RAMP UP

Next: End

E15

SENSOR - TEMPERATURE (FLOW)

Next: End

E15

SENSOR - TEMPERATURE (RETURN)

Next: End

E03 - DOES NOT RESET

SENSOR - TEMPERATURE (FLOW)

Next: End

E03 - RESETS

SENSOR - TEMPERATURE (FLOW)

Next: End

F82

PCB

Next: End

E03 - RESETS

SENSOR - TEMPERATURE (RETURN)

Next: End

E03 - RESETS

SENSOR - TEMPERATURE - DHW

Next: End

E03

PACK - FLOW VALVE / RETURN VALVE

Next: End

E03

PCB

Next: End

E03

HARNESS X10

Next: End

E03

INSERT - 3-WAY VALVE

Next: End

OPERATION CH - UP TO TEMP RADS COOL

PACK - FLOW VALVE / RETURN VALVE

Next: End

E03

HEAT EXCHANGER (WATERWAYS)

Next: End

E03 - RESETS

PCB

Next: End

E16

SENSOR - TEMPERATURE (FLOW)

Next: End

E16

SENSOR - TEMPERATURE (RETURN)

Next: End

E15

PACK - FLOW VALVE / RETURN VALVE

Next: End

E16

PACK - FLOW VALVE / RETURN VALVE

Next: End

E03

SYSTEM PRESSURE

Next: End

E33 - WILL NOT RESET

PCB

Next: End

E16

PUMP HEAD

Next: End

E35 - WILL NOT RESET

PCB

Next: End

F81

SENSOR - TEMPERATURE (RETURN)

Next: End

INFORMATION BOILER DIAGNOSTICS

Z REDIRECT

Next: End

F81

NO FAULT F-LOCKOUT

Next: End

FUSE INVESTIGATION

MOTOR AND INSERT - 3 WAY VALVE

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION - NO DROP

FLUE

Next: End

OBSERVATION BURNER IGNITION - IGNITES BUT DOES NOT ESTABLISH

LEAD - SPARK

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE - MAINS

Next: End

OBSERVATION BOILER STANDBY - FIRES NO DEMAND

FROST PROTECTION

Next: End

OPERATION CH - UP TO TEMP RADS COOL

INTERNAL BYPASS

Next: End

F52 - NO FAULT - DAMAGED

HARNESS X5-X7

Next: End

OBSERVATION DISPLAY ILLUMINATES

LEAD - MAINS

Next: End

F52 - SHORTING TO EARTH

HARNESS X5-X7

Next: End

F39 - FAULT ABSENT

HARNESS X3

Next: End

F39 - FAULT ABSENT - DAMAGED

HARNESS X3

Next: End

F50

WIRING

Next: End

F13

PCB

Next: End

OBSERVATION DHW FLOW RATE

SENSOR - FLOW

Next: End

E02

ELECTRODE - SPARK DETECTION

Next: End

E15

SYSTEM PRESSURE

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE - 3 15A

Next: End

E09

PCB

Next: End

E16

SYSTEM PRESSURE

Next: End

F34 - FAULT ABSENT

Next: End

OBSERVATION PUMP RUNS CH DEMAND

HARNESS X3 / CLOCK

Next: End

OBSERVATION PUMP RUNS CH DEMAND OPENTHERM

HARNESS X3 / CLOCK

Next: End

OPERATION DHW - DHW COOL RADS COOL

SENSOR - TEMPERATURE (FLOW)

Next: End

OPERATION DHW - DHW COOL RADS COOL

SENSOR - TEMPERATURE (RETURN)

Next: End

OPERATION DHW - DHW COOL RADS COOL

SENSOR - TEMPERATURE - DHW

Next: End

OBSERVATION DISPLAY ILLUMINATES

HARNESS X5-X7

Next: End

OPERATION DHW - DHW COOL RADS COOL

HEAT EXCHANGER (WATERWAYS)

Next: End

OPERATION DHW - DHW COOL RADS COOL

TRAP - CONDENSATE

Next: End

OPERATION DHW - DHW COOL RADS COOL

INLET PRESSURE

Next: End

OPERATION DHW - DHW COOL RADS COOL

FAN - COMBUSTION

Next: End

OPERATION DHW - DHW COOL RADS COOL

FLUE

Next: End

OPERATION DHW - DHW COOL RADS COOL

INJECTOR

Next: End

OPERATION DHW - DHW COOL RADS COOL

BURNER

Next: End

OPERATION DHW - DHW COOL RADS COOL

HEAT EXCHANGER

Next: End

OPERATION DHW - DHW COOL RADS COOL

EXTERNAL MIXING

Next: End

OPERATION DHW - DHW COOL RADS COOL - GAS RATE OK

SENSOR - TEMPERATURE (FLOW)

Next: End

OPERATION DHW - DHW COOL RADS COOL - GAS RATE OK

SENSOR - TEMPERATURE (RETURN)

Next: End

OPERATION DHW - DHW COOL RADS COOL - GAS RATE OK

SENSOR - TEMPERATURE - DHW

Next: End

OPERATION DHW - DHW RUNS HOT COLD

SENSOR - TEMPERATURE (FLOW)

Next: End

OPERATION DHW - DHW RUNS HOT COLD

SENSOR - TEMPERATURE (RETURN)

Next: End

OPERATION DHW - DHW RUNS HOT COLD

SENSOR - TEMPERATURE - DHW

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER (WATERWAYS)

Next: End

E03 - PUMP OVERRUN

PCB

Next: End

OBSERVATION DISPLAY ILLUMINATES - FAN RUNS

PCB

Next: End

E03

Next: End

F47 - FAULT ABSENT

SENSOR - PRESSURE - CENTRAL HEATING

Next: End

F52 - SCALED

SENSOR - TEMPERATURE - DHW

Next: End

OBSERVATION DISPLAY ILLUMINATES

HARNESS X4

Next: End

F40

PACK - FILLING LOOP

Next: End

FUSE INVESTIGATION

FAN - COMBUSTION

Next: End

OBSERVATION BOILER STANDBY - PUMP DOES NOT RUN

HARNESS X11

Next: End

OPERATION DHW - DHW COOL RADS COOL

PUMP HEAD

Next: End

OBSERVATION BOILER STANDBY - PUMP DOES NOT RUN

PCB

Next: End

E03

PUMP HEAD

Next: End

OPERATION DHW - DHW RUNS HOT COLD

PUMP HEAD

Next: End

OBSERVATION BOILER STANDBY - FIRING WITH NO DEMAND - CH

PCB

Next: End

OBSERVATION BOILER STANDBY - FIRING WITH NO DEMAND - DHW

PCB

Next: End

OBSERVATION DHW FLOW RATE

PLATE HEAT EXCHANGER

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

SENSOR - FLOW

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

PCB

Next: End

OBSERVATION FAN RUNS DHW DEMAND

PCB

Next: End

F52

PCB

Next: End

F53

PCB

Next: End

F53 - FAULT PRESENT

THERMAL FUSE

Next: End

F52 - FAULT PRESENT

SENSOR - TEMPERATURE - DHW

Next: End

E21

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITION - NO SPARKING

ELECTRODE - SPARK DETECTION

Next: End

OBSERVATION BURNER IGNITES - SPARKING NO IGNITION

INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION - RESISTANCE

GAS VALVE PX42

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION - MIXTURE OR NOT OPENING FULLY

GAS VALVE PX42

Next: End

OBSERVATION BURNER IGNITION - DOES NOT ESTABLISH

PCB

Next: End

FAULT CODES DHW OP 1

Z REDIRECT

Next: End

OPERATION DHW - DHW COOL RADS HEAT

INSERT - 3-WAY VALVE

Next: End

OPERATION DHW - DHW COOL RADS HEAT

MOTOR - ACTUATOR - 3-WAY VALVE

Next: End

F47 - IGNORING PRESSURE SENSOR

PCB

Next: End

F47 - FAULT PRESENT

SENSOR - PRESSURE - CENTRAL HEATING

Next: End

F53

NO FAULT F-LOCKOUT

Next: End

F07 - FAULT PRESENT

THERMAL FUSE

Next: End

F53 - FAULT PRESENT

PCB

Next: End

F07 - FAULT ABSENT

FLUEWAYS

Next: End

F34

PCB

Next: End

F40

PCB

Next: End

FAULT CODES 1

Z REDIRECT

Next: End

E05 - IGNORING HALL SENSOR

PCB

Next: End

E05 - HALL

FAN - COMBUSTION

Next: End

E05 - FAN DOES NOT RUN

FAN - COMBUSTION

Next: End

E02

PCB

Next: End

F39

PCB

Next: End

F39 - FAULT PRESENT

OUTDOOR SENSOR

Next: End

F37

PCB

Next: End

F37

NO FAULT F-LOCKOUT

Next: End

OBSERVATION BURNER IGNITION - BAFFLES

GAS VALVE PX42

Next: End

OPERATION DHW - DHW TOO HOT

PCB

Next: End

FUSE INVESTIGATION - PUMP

HARNESS X11

Next: End

FUSE INVESTIGATION

FUSE INVESTIGATION - NO FAULT

Next: End

FUSE INVESTIGATION

HARNESS X10

Next: End

E03 - DOES NOT RESET

PCB

Next: End

E09

GAS VALVE PX42

Next: End

E08

Z REDIRECT

Next: End

E12

Z REDIRECT

Next: End

OPERATION CH

HOSE - EXPANSION VESSEL

Next: End

OPERATION CH - UP TO TEMP RADS COOL

MOTOR - ACTUATOR - 3-WAY VALVE

Next: End

OPERATION CH - DOES NOT RAMP UPOPERATION DHW - DHW COOL RADS COOL - MODULATING

PCB

Next: End

E03

MOTOR - ACTUATOR - 3-WAY VALVE

Next: End

E03

PLATE HEAT EXCHANGER

Next: End

E15

PCB

Next: End

E16

PCB

Next: End

E33

HARNESS X5-X7

Next: End

E33

Z REDIRECT

Next: End

E35

Z REDIRECT

Next: End

E35

HARNESS X5-X7

Next: End

F81

PCB

Next: End

OBSERVATION DISPLAY ILLUMINATES

Next: End

OBSERVATION BURNER IGNITION - SPARKING NO IGNITION - NOT OPENING

GAS VALVE PX42

Next: End

F37 - FAULT PRESENT

SENSOR - PRESSURE - CENTRAL HEATING

Next: End

OBSERVATION DISPLAY ILLUMINATES - MAINS FUSE

Z REDIRECT

Next: End

F37 - FAULT PRESENT

PACK - FLOW VALVE

Next: End

F37 - FAULT PRESENT

SENSOR - PRESSURE (BLOCKAGE)

Next: End

OPERATION CH - UP TO TEMP RADS COOL

Next: End

F52 - FAULT ABSENT

SENSOR - TEMPERATURE - DHW

Next: End

F39

NO FAULT F-LOCKOUT

Next: End

F39 - FAULT ABSENT

OUTDOOR SENSOR

Next: End

OBSERVATION DISPLAY ILLUMINATES - FAN DOES NOT RUN

PCB

Next: End

F50

HE OUTLET SENSOR

Next: End

F50

PCB

Next: End

F13

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES - PCB FUSE

Z REDIRECT

Next: End

E09

Z REDIRECT

Next: End

F34 - FAULT ABSENT

NO FAULT F-LOCKOUT

Next: End

OBSERVATION PUMP RUNS CH DEMAND

Next: End

OBSERVATION PUMP RUNS CH DEMAND

PCB

Next: End

OBSERVATION PUMP RUNS CH DEMAND

OPENTHERM CONTROLS

Next: End

OBSERVATION PUMP RUNS CH DEMAND OPENTHERM

PCB

Next: End

OBSERVATION DISPLAY ILLUMINATES

SENSOR - PRESSURE - CENTRAL HEATING

Next: End

OPERATION DHW - DHW COOL RADS COOL - MODULATING

PCB

Next: End

OPERATION DHW - DHW COOL RADS COOL

PLATE HEAT EXCHANGER

Next: End

OPERATION DHW - DHW COOL RADS COOL - NOT GOING TO MAX

PCB

Next: End

OPERATION DHW - DHW COOL RADS COOL - GAS RATE OK

PCB

Next: End

OPERATION DHW - DHW RUNS HOT COLD

PCB

Next: End

OPERATION DHW - DHW RUNS HOT COLD

PLATE HEAT EXCHANGER

Next: End

E03

NO FAULT OVERHEAT

Next: End

OBSERVATION DISPLAY ILLUMINATES

FAN - COMBUSTION

Next: End

F52

NO FAULT F-LOCKOUT

Next: End

F40 - FAULT ABSENT

PACK - FLOW VALVE

Next: End

F40 - FAULT ABSENT

SENSOR - PRESSURE (BLOCKAGE)

Next: End

F40

EXPANSION VESSEL

Next: End

F40

HOSE - EXPANSION VESSEL

Next: End

F40

NO FAULT FOUND F40

Next: End

F47 - FAULT ABSENT

PACK - FLOW VALVE

Next: End

F47 - FAULT ABSENT

SENSOR - PRESSURE (BLOCKAGE)

Next: End

F47

NO FAULT F-LOCKOUT

Next: End

OBSERVATION BOILER STANDBY - PUMP DOES NOT RUN

PUMP HEAD

Next: End

FUSE INVESTIGATION - FAN / SPRAYAWAY

HARNESS X11

Next: End

BURNER DOES NOT IGNITE AND NO SPARKING OCCURS

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p142

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p235

BURNER IGNITES BUT BAFFLES OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p146

BURNER IGNITES BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p673

INLET PRESSURE DROPS BELOW MINIMUM DURING SPARKING

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p214

INLET PRESSURE DOES NOT DROP DURING SPARKING

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p256

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p286

DHW COOL AND RADIATORS BEGIN TO HEAT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p290

BOILER RUNS FOR SHORT PERIOD THEN SHUTS DOWN WITH FAULT CODE SHOWING

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p292

BOILER REACHES TEMPERATURE RADIATORS DO NOT HEAT

CHARACTERISTIC TEST FROM OPERATION CH

Next: p484

SYSTEM PRESSURE RISE IS EXCESSIVE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p486

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p6

BOILER AND RADIATOR TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p553

BLOCKAGE PRESENT IN PRESSURE GAUGE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

Next: !p681

BLOCKAGE PRESENT IN PRESSURE SENSOR AND / OR BLOCKAGE IN SENSOR HOUSING

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

Next: !p683

BOILER ATTEMPTS TO FIRE OR PUMP/FAN RUN AFTER SELF CHECK

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p8

DHW COOL, RADIATORS REMAIN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p774

GAS RATE LOW

Next: p778

BOILER MODULATES OR CUTS OUT BEFORE GAS RATE CAN BE TAKEN

Next: p912

DHW RUNS HOT COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p951

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BOILER STANDBY

Next: p89

BLOCKAGE PRESENT IN PRESSURE GAUGE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

Next: !p881

BLOCKAGE PRESENT IN PRESSURE SENSOR AND / OR BLOCKAGE IN SENSOR HOUSING

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

Next: !p883

PRESSURE LOW BUT REPRESSURES AT NORMAL RATE

CHARACTERISTIC TEST FROM PRESSURE EXPANSION VESSEL AND HOSE

Next: !p896

PRESSURE INCREASES RAPIDLY WHEN USING FOOT PUMP

CHARACTERISTIC TEST FROM PRESSURE EXPANSION VESSEL AND HOSE

Next: !p898

BLOCKAGE PRESENT IN PRESSURE GAUGE

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

Next: !p905

BLOCKAGE PRESENT IN PRESSURE SENSOR AND / OR BLOCKAGE IN SENSOR HOUSING

CHARACTERISTIC TEST FROM INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

Next: !p907

14/09/2018 14:01:09 1805_2_50_1 20/09/2018 09:49:10

05/09/2018 11:02:26

Next: End

OBSERVATION ISOLATE DHW

ISOLATE THE COLD FEED TO APPLIANCE (REAR BLUE TAP ON THE DHW INLET PIPE)

Next: p105, !f104

OBSERVATION SUPPLY INTO BOILER

Next: p118, !f116

RESISTANCE DHW FLOW SWITCH AT PCB

{GAINPCBACS}
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: !p128, f125

RESISTANCE HARNESS FLOW SWITCH

DISCONNECT CONNECTOR X7 FROM THE PCB
DISCONNECT PLUG FROM FLOW SWITCH

Next: !p126, !f127

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p133, !f134

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT

Next: p165, f694

RESISTANCE HARNESS DHW SENSOR

DISCONNECT SPADES FROM DHW SENSOR
DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p185, !f169

RESISTANCE FLUE SENSOR

DISCONNECT WIRES FROM FLUE THERMISTOR

Next: p174, !f175

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: !p650, !f182

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: !p641, !f193

RESISTANCE HARNESS GAS VALVE

DISCONNECT PLUG FROM THE GAS VALVE

Next: !p259, !f260

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}

Next: p297, !f298

INSPECTION HARNESS WATER PRESSURE SENSOR

DISCONNECT PLUG FROM WATER PRESSURE SWITCH
DISCONNECT CONNECTOR X7 FROM THE PCB

Next: p862, !f308

VOLTAGE PRESSURE SENSOR (PERMANENT) AT PCB

Next: p312, !f313

RESISTANCE FLUE SENSOR

DISCONNECT WIRES FROM FLUE THERMISTOR

Next: p317, !f322

RESISTANCE FLUE SENSOR

DISCONNECT WIRES FROM FLUE THERMISTOR

Next: !p325, !f326

RESISTANCE FLUE SENSOR

DISCONNECT WIRES FROM FLUE THERMISTOR

Next: p330, !f331

VOLTAGE FAN AT PCB (HV)

{GAINPCBACS}

Next: p369, !f378

INSPECTION PRESSURE SYSTEM (TOO HIGH)

Next: p349, !f348

RESISTANCE HARNESS FAN (LV)

DISCONNECT LOW VOLTAGE PLUG FROM THE FAN

Next: !p367, !f366

RESISTANCE SPARK ELECTRODE LEAD

DISCONNECT SPARK ELECTRODE LEAD FROM THE SPARK ELECTRODE AND PCB

Next: p739, !f396

OBSERVATION BOILER RESET (OVERHEAT)

ENSURE BOILER IS COOL

Next: p598, f500

OBSERVATION DOES FAN RUN BEFORE LOCKOUT

Next: p344, f343

RESISTANCE HARNESS OUTDOOR SENSOR

DISCONNECT X3 FROM THE PCB

Next: !p402, !f403

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT

Next: p408, f410

OBSERVATION BOILER RESET

Next: !p511, !f512

INSPECTION PRESSURE SYSTEM

Next: p415, !f412

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p749, f507

OBSERVATION BOILER RESET

Next: !p513, !f514

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p570, !f569

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p628, !f629

OBSERVATION BOILER RESET

Next: !p187, !f189

RESISTANCE RETURN SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: p640, f191

RESISTANCE FLOW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: p180, f181

RESISTANCE DIVERTER VALVE

DISCONNECT WIRES FROM DIVERTER VALVE
UNCLIP AND REMOVE DIVERTER VALVE

Next: !p498, !f499

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT (F7)

Next: p323, f329

RESISTANCE PUMP

DISCONNECT INLINE CONNECTOR AT PUMP FOR MAINS VOLTAGE

Next: !p491, !f492

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT

Next: p338, f759

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p502, !f576

RESISTANCE HARNESS GAS VALVE

DISCONNECT PLUG FROM THE GAS VALVE

Next: !p508, !f510

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}

Next: p519, !f520

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT

Next: p196, f701

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT

Next: p178, f347

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT

Next: p309, f306

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT

Next: p171, f316

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p392, !f391

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}

Next: p591, !f592

RESISTANCE PUMP AND HARNESS

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p197, f490

OBSERVATION FAN RUNS (NO DISPLAY)

Next: p76, f62

VOLTAGE MAINS IN AT TERMINALS

{GAINPCBACS}

Next: p63, f64

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS SHOWN IN THE PICTURE

Next: !p621, !f622

RESISTANCE FUSE (MAINS FUSE)

REMOVE FUSE FROM FUSED SPUR

Next: !p66, f67

FUSE FURTHER INVESTIGATION

Next: !p68, !f69

INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

DRAIN BOILER'S PRIMARY CIRCUIT

Next: !p679, ?680, ?682

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: p695, f696

RESISTANCE HARNESS DHW SENSOR

DISCONNECT SPADES FROM DHW SENSOR
DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p697, !f698

RESISTANCE OUTDOOR SENSOR AND HARNESS

DISCONNECT CONNECTOR X3 FROM THE PCB

Next: p702, f706

RESISTANCE HARNESS OUTDOOR SENSOR

DISCONNECT X3 FROM THE PCB

Next: !p707, !f708

OBSERVATION REMOTE RESET LOCKOUT

Next: !p717, !f718

OBSERVATION IS BOILER FITTED WITH HEAT RECOVERY

Next: !p713, f714

INSPECTION BOILER WIRING

Next: !p715, !f716

FUSE FURTHER INVESTIGATION

Next: !p73, !f75

VOLTAGE MAINS IN AT TERMINALS (F34)

{GAINPCBACS}

Next: !p760, !f761

OBSERVATION IS OPENTHERM CONTROL FITTED

GAIN ACCESS TO PCB

Next: p768, f763

OBSERVATION LINK EXTERNAL CONTROLS

DISCONNECT THE WIRES

Next: !p764, f765

RESISTANCE EXTERNAL CONTROLS WITH LINK

LINK STILL IN PLACE AT TERMINAL BLOCKS AS PER PREVIOUS TEST
DISCONNECT CONNECTOR X3 FROM THE PCB

Next: !p766, !f767

RESISTANCE EXTERNAL CONTROLS WITH LINK

LINK STILL IN PLACE AT TERMINAL BLOCKS AS PER PREVIOUS TEST
DISCONNECT CONNECTOR X3 FROM THE PCB

Next: !p771, !f772

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS SHOWN IN THE PICTURE

Next: !p789, !f790

OBSERVATION DISCONNECT X4

DISCONNECT CONNECTOR X4 FROM THE PCB AND MAKE SAFE

Next: p84, !f85

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS SHOWN IN THE PICTURE

Next: !p825, !f826

RESISTANCE FAN

DISCONNECT HIGH VOLTAGE PLUG FROM FAN

Next: !p910, !f911

OBSERVATION DISCONNECT X3 (EXTERNAL CONTROLS)

DISCONNECT CONNECTOR X3 FROM THE PCB AND MAKE SAFE

Next: p106, !f107

OBSERVATION DISCONNECT FLOW SWITCH

DISCONNECT PLUG FROM FLOW SWITCH AND MAKE SAFE

Next: p110, !f111

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: !p108, !f109

RESISTANCE HARNESS FLOW SWITCH (OPEN CIRCUIT)

DISCONNECT CONNECTOR X7 FROM THE PCB
NO DHW DEMANDS

Next: !p112, !f117

INSPECTION ISOLATION VALVE DHW

Next: p149, !f119

INSPECTION DHW RESTRICTOR

ISOLATE AND DRAIN DHW SUPPLY TO BOILER
REMOVE GAS VALVE
REMOVE DHW FLOW SWITCH

Next: !p121, !f122

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p136, !f156

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p137, !f138

OBSERVATION SPARKING AT PCB

{GAINPCBACS}
DISCONNECT IGNITION LEAD FROM PCB AND MAKE SAFE

Next: p202, !f198

INSPECTION CONDENSATE

Next: p210, !f209

INSPECTION CONDENSATE

Next: p419, !f418

INSPECTION SPARK ELECTRODE

REMOVE ELECTRODE FROM BURNER DOOR

Next: !p277, !f279

INSPECTION DHW FILTER

ISOLATE AND DRAIN DHW SUPPLY TO BOILER

Next: p719, !f153

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p166, f167

RESISTANCE FLUE SENSOR / THERMAL FUSE AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p172, f173

RESISTANCE HARNESS FLUE SENSOR AND THERMAL FUSE

DISCONNECT THE WIRES FROM THE FLUE SENSOR AND THERMAL FUSE
DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p176, !f177

INSPECTION PRESSURE SYSTEM (TOO HIGH)

Next: p336, !f337

OBSERVATION BOILER RESET

Next: !p647, !f649

RESISTANCE OUTDOOR SENSOR AND HARNESS

DISCONNECT CONNECTOR X3 FROM THE PCB

Next: !p400, f401

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p657, f909

RESISTANCE SPARK ELECTRODE LEAD

DISCONNECT SPARK ELECTRODE LEAD FROM THE SPARK ELECTRODE AND PCB

Next: !p203, !f204

PRESSURE GAS INLET AND DROP

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT (ON GAS ISOLATION VALVE)

Next: p212, ?213, ?215

INSPECTION FAN

Next: p230, !f263

INSPECTION INJECTOR

REMOVE CLIP AT THE T

Next: p268, !f265

INSPECTION COMPENSATION TUBE

Next: p144, !f254

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p257, f258

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
PULL CONNECTOR X4 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: p669, !f262

INSPECTION SPARK ELECTRODE AND GAP

REMOVE BURNER DOOR FROM APPLIANCE

Next: p267, !f266

INSPECTION BURNER

REMOVE BURNER DOOR ASSEMBLY

Next: p274, !f273

INSPECTION FLUE

Next: p264, !f272

INSPECTION HEAT EXCHANGER

REMOVE BURNER DOOR ASSEMBLY

Next: !p275, !f276

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p482, !f481

OBSERVATION IS DIVERTER IN DHW POSITION

UNCLIP DIVERTER VALVE AND PLACE IN A POSITION WHERE THE DIVERTER SPINDLE CAN BE EASILY OBSERVED

Next: !p295, f296

FAULT CODES

Next: !p293, !f294

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT X10 FROM THE PCB
DISCONNECT SPADES FROM THE DIVERTER VALVE

Next: !p299, !f300

VOLTAGE PRESSURE SENSOR (PRESSURE) AT PCB

{GAINPCBACS}
PULL CONNECTOR X7 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: !p311, f310

RESISTANCE HARNESS WATER PRESSURE SENSOR

DISCONNECT PLUG FROM WATER PRESSURE SWITCH

Next: !p314, !f315

RESISTANCE THERMAL FUSE

DISCONNECT LEAD TO THERMAL FUSE

Next: !p318, !f321

RESISTANCE FLUE SENSOR / THERMAL FUSE AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p327, f324

RESISTANCE THERMAL FUSE

DISCONNECT LEAD TO THERMAL FUSE

Next: !p332, !f333

VOLTAGE PRESSURE SENSOR (PRESSURE) AT PCB

{GAINPCBACS}
PULL CONNECTOR X7 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: !p345, !f346

VOLTAGE MAINS IN AT TERMINALS (F34)

{GAINPCBACS}

Next: !p342, !f339

VOLTAGE FAN AT PCB (HALL)

{GAINPCBACS}
PULL CONNECTOR X4 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: !p361, f362

VOLTAGE PRESSURE SENSOR (PRESSURE) AT PCB

{GAINPCBACS}
PULL CONNECTOR X7 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: p878, !f351

VOLTAGE FAN AT PCB (LV)

{GAINPCBACS}
DISCONNECT CONNECTOR X4 AT THE PCB

Next: p371, !f377

RESISTANCE HARNESS FAN (HV)

DISCONNECT HIGH VOLTAGE PLUG FROM THE FAN
DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p372, !f375

RESISTANCE HARNESS FAN (LV)

DISCONNECT LOW VOLTAGE PLUG FROM THE FAN

Next: !p373, !f374

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p393, !f651

OBSERVATION IS BOILER CURRENTLY SHOWING FAULT (F81)

Next: !p652, !f667

INSPECTION BOILER WIRING

Next: !p398, !f399

INSPECTION PRESSURE SYSTEM

Next: p409, !f411

VOLTAGE PRESSURE SENSOR (PRESSURE) AT PCB

{GAINPCBACS}
PULL CONNECTOR X7 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: !p413, f678

VOLTAGE PRESSURE SENSOR (PRESSURE) AT PCB

{GAINPCBACS}
PULL CONNECTOR X7 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: !p416, !f417

INSPECTION COMPENSATION TUBE

Next: p421, !f420

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT (ON GAS ISOLATION VALVE)

Next: p423, !f422

INSPECTION FAN

Next: p424, !f425

INSPECTION FLUE

Next: p426, !f427

INSPECTION INJECTOR

REMOVE CLIP AT THE T

Next: p428, !f429

INSPECTION HEAT EXCHANGER

REMOVE BURNER DOOR ASSEMBLY

Next: p430, !f431

INSPECTION BURNER

REMOVE BURNER DOOR ASSEMBLY

Next: !p432, !f433

OBSERVATION IS DIVERTER IN CH POSITION

UNCLIP DIVERTER VALVE AND PLACE IN A POSITION WHERE THE DIVERTER SPINDLE CAN BE EASILY OBSERVED

Next: p523, f518

PRESSURE EXPANSION VESSEL

DRAIN BOILER'S PRIMARY CIRCUIT
ATTACH FOOT PUMP TO SCHRADER VALVE ON EXPANSION VESSEL

Next: !p515, !f516

RESISTANCE DIVERTER VALVE AND HARNESS

DISCONNECT CONNECTOR X10 AT THE PCB

Next: !p497, f488

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: !p503, !f504

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p577, !f578

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT X10 FROM THE PCB
DISCONNECT SPADES FROM THE DIVERTER VALVE

Next: !p521, !f522

INSPECTION DIVERTER SPINDLE

UNCLIP AND REMOVE THE DIVERTER MOTOR
(THIS DOES NOT NEED APPLIANCE TO BE DRAINED DOWN)

Next: p583, !f524

INSPECTION EXTERNAL BYPASS

Next: p691, !f527

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p554, !f555

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p566, !f557

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS SHOWN IN THE PICTURE

Next: !p567, !f568

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p744, !f575

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p579, !f580

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: p581, !f582

INSPECTION ISOLATION VALVES

Next: p929, !f588

INSPECTION ISOLATION VALVES

Next: p525, !f617

OBSERVATION DIVERTER VALVE MOVEMENT

UNCLIP DIVERTER VALVE AND PLACE IN A POSITION WHERE
THE DIVERTER SPINDLE CAN BE EASILY OBSERVED

Next: p595, f590

RESISTANCE HARNESS DIVERTER VALVE

DISCONNECT X10 FROM THE PCB
DISCONNECT SPADES FROM THE DIVERTER VALVE

Next: !p593, !f594

INSPECTION DIVERTER SPINDLE

UNCLIP AND REMOVE THE DIVERTER MOTOR
(THIS DOES NOT NEED APPLIANCE TO BE DRAINED DOWN)

Next: p618, !f596

INSPECTION PRESSURE SYSTEM

Next: p833, !f639

FAULT CODES

Next: !p35, !f36

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS SHOWN IN THE PICTURE

Next: p625, f620

OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: p829, !f627

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p752, !f631

VOLTAGE MAINS IN AT PCB

Next: p65, !f70

INSPECTION ISOLATION VALVES

Next: p636, !f635

INSPECTION ISOLATION VALVES

Next: !p633, !f634

PUMP LIMPET TEST

Next: !p637, !f646

OBSERVATION BOILER RESET

Next: !p642, !f643

RESISTANCE FUSE (PCB)

REMOVE FUSE FROM PCB

Next: !p71, f72

INSPECTION DIVERTER BODY AND MOTOR

UNCLIP AND REMOVE DIVERTER MOTOR
(THIS DOES NOT NEED APPLIANCE TO BE DRAINED DOWN)

Next: p487, !f668

INSPECTION FLUE

Next: !p672, !f671

RESISTANCE SPARK ELECTRODE LEAD

DISCONNECT SPARK ELECTRODE LEAD FROM THE SPARK ELECTRODE AND PCB

Next: p148, !f677

TEMPERATURE AMBIENT

Next: p103, !f690

TEMPERATURE INTERNAL BYPASS

Next: !p692, !f693

INSPECTION HARNESS DHW SENSOR

DISCONNECT SPADE CONNECTORS FROM DHW SENSOR
DISCONNECT X5 FROM THE PCB

Next: p865, !f700

INSPECTION HARNESS OUTDOOR SENSOR

DISCONNECT X3 FROM THE PCB

Next: !p705, !f704

INSPECTION DHW FLOW SWITCH

ISOLATE AND DRAIN DHW SUPPLY TO BOILER
REMOVE GAS VALVE
REMOVE DHW FLOW SWITCH

Next: p120, !f723

INSPECTION SPARK ELECTRODE

REMOVE ELECTRODE FROM BURNER DOOR

Next: p397, !f743

INSPECTION PRESSURE SYSTEM

Next: p632, !f748

OBSERVATION BOILER RESET

Next: !p750, !f751

INSPECTION PRESSURE SYSTEM

Next: p630, !f758

OBSERVATION DISCONNECT X7

DISCONNECT CONNECTOR X7 FROM THE PCB AND MAKE SAFE

Next: p77, f81

DISCONNECT OPENTHERM CONTROLS

DISCONNECT WIRES FOR OPENTHERM CONTROLS AND MAKE SAFE

Next: !p769, f770

OBSERVATION DISCONNECT PRESSURE SENSOR

DISCONNECT THE PLUG

Next: !p78, !f79

GAS RATE

Next: p775, ?777, ?779

OBSERVATION EXTERNAL MIXING

Next: p807, !f808

INSPECTION CONDENSATE

Next: p793, !f794

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p781, !f782

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p783, !f784

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: p785, !f786

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS SHOWN IN THE PICTURE

Next: !p787, f788

PRESSURE GAS INLET

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT (ON GAS ISOLATION VALVE)

Next: p795, !f796

INSPECTION FAN

Next: p797, !f798

INSPECTION FLUE

Next: p799, !f800

INSPECTION INJECTOR

REMOVE CLIP AT THE T

Next: p801, !f802

OBSERVATION WHICH DEMAND IS SHOWING

Next: p684, f100

INSPECTION BURNER

REMOVE BURNER DOOR ASSEMBLY

Next: p803, !f804

INSPECTION HEAT EXCHANGER

REMOVE BURNER DOOR ASSEMBLY

Next: !p805, !f806

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p809, !f810

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p811, !f812

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: !p813, !f814

RESISTANCE FLOW SENSOR

DISCONNECT WIRES FROM FLOW THERMISTOR (FRONT THERMISTOR)

Next: p817, !f818

RESISTANCE RETURN SENSOR

DISCONNECT WIRES FROM RETURN THERMISTOR (REAR THERMISTOR)

Next: p819, !f820

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR X5 FROM THE PCB

Next: p821, !f822

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS SHOWN IN THE PICTURE

Next: !p823, f824

OBSERVATION PUMP OVERRUN

Next: !p831, !f832

INSPECTION EXTERNAL BYPASS

Next: p505, !f861

OBSERVATION DISCONNECT FAN (LV)

DISCONNECT THE LOW V

Next: !p86, !f87

VOLTAGE PRESSURE SENSOR (PRESSURE) AT PCB

{GAINPCBACS}
PULL CONNECTOR X7 BACK SLIGHTLY TO EXPOSE SOLDERED POINTS ON PCB AS SHOWN

Next: p902, !f864

INSPECTION DHW SENSOR

TURN DHW ISOLATION VALVE OFF

Next: !p866, !f867

INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

DRAIN BOILER'S PRIMARY CIRCUIT

Next: p893, ?880, ?882

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p90, !f93

PRESSURE EXPANSION VESSEL AND HOSE

DRAIN BOILER'S PRIMARY CIRCUIT
ATTACH FOOT PUMP TO SCHRADER VALVE ON EXPANSION VESSEL

Next: p894, ?895, ?897

INSPECTION FILLING LOOP

ENSURE BOTH FILLING

Next: !p899, !f900

RESISTANCE HARNESS PUMP

DISCONNECT INLINE CONNECTOR TO PUMP
DISCONNECT X11 FROM THE PCB

Next: !p91, !f92

INSPECTION PRESSURE SENSOR & GAUGE BLOCKAGES

DRAIN BOILER'S PRIMARY CIRCUIT

Next: !p908, ?904, ?906

PUMP LIMPET TEST

Next: p780, !f928

PUMP LIMPET TEST

Next: p589, !f949

PUMP LIMPET TEST

Next: p816, !f965

System Information

• Total Tests: 547
• Sequence Logic: Decoded from encrypted .seq file
• Navigation: Dynamic based on pass/fail results
• Source: 4731307 GW SWIFTFLOW 100 SIT Control