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:

WORCESTER GREENSTAR 31 CDI COMBI LPG

WARNING - IMPORTA

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

WORCESTER GREENSTAR 31 CDI COMBI LPG

CASE REMOVAL<

Next: &210, !f2

DHW FLOW RATE

Next: &18, f6

DHW BURNER IGNITION & ESTABLISH

ECO MODE ON (NO PREHEAT)
RESET THE APPLIANCE IF IN LOCKOUT

Next: &1160, ?19, ?21, ?212, ?325

DHW OPERATION

Next: &1142, ?108, ?110, ?112, ?114, ?581

CH OPERATION

Next: &183, ?163, ?165, ?167, ?632, ?702

CENTRAL HEATING MODULATION

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: &187, f184

PRE-HEAT

ENSURE THE ECO BUTTO

Next: &193, f188

PUMP OVERRUN

Next: &195, !f194

SYPHON OPERATION

Next: &nff, !f196

POWER UP (CONTROL PCB ONLY)

{ONOFFSWITCHON}

Next: &5, f199

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &198, !f866

FURTHER INVESTIGATION OVERHEAT

Next: &nff, f707

FAULT CODES

Next: &nff, !f863

FUSE FURTHER INVESTIGATION

Next: &nff, f819

OPERATIONAL SEQUENCE

Next: &nff, !f864

A7 DHW THERMISTOR INVESTIGATION

INTENTIONALLY BLANK HEADER FOR A7 FAULT CODE

Next: &nff, f873

E2 CH FLOW SENSOR INVESTIGATION

Next: &nff, f879

B1 CODE PLUG INVESTIGATION

INTENTIONALLY BLANK

Next: &nff, f927

FD FURTHER INVESTIGATION

Next: &nff, f931

FA AND F7 INVESTIGATION

HEADER FOR FA AND F7 INVESTIGATION

Next: &nff, f954

F0 WITHOUT RESET FLASHING INVESTIGATION

Next: &nff, f978

F0 WITH RESET FLASHING INVESTIGATION

Next: &nff, f988

MAX & MIN (CHIMNEY SWEEP) MODE

INSTRUCTIONS TO S

Next: &nff, !f995

SE RESET GUIDE

SE CODE APPEARS IN T

Next: &nff, !f997

ADDITIONAL SYMBOLS GUIDE

Next: &nff, !f1038

PRESSURE FAN MAXIMUM OUTPUT

ATTACH PRESSURE GAUG

Next: &1116, ?1199, ?1201

PERFORMANCE TEST MAX AND MIN

<

Next: &107, ?1085, ?1087

MAX AND MIN CHECK FOR CH OPERATION FROM OPS SEQUENCE

NOT USED

Next: &nff, f1097

PERFORMANCE TEST FAIL

NOT USED

Next: &nff, f1107

PRESSURE GAS INLET

ATTACH U GAUGE TO GA

Next: &1084, !f1117

CH DEMAND

HOLIDAY MODE OFF (BU

Next: &162, f1143

PUMP RUNS

REMOVE PUMP VENT SCR

Next: &1052, f1161

BURNER IGNITES BUT BAFFLES

FLUEWAYS

Next: End

LOW FAN PRESSURE BAFFLING OUT

FLUE

Next: End

IGNITES BUT DOES NOT ESTABLISH

FLUEWAYS

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

FLUE

Next: End

POOR FAN PRESSURE

FLUEWAYS

Next: End

INCORRECT RETURN VOLTAGE

HARNESS FAN

Next: End

INCORRECT RETURN VOLTAGE 2

HARNESS FAN

Next: End

PREHEAT

SENSOR - TEMPERATURE - DHW

Next: End

BLANK FOR ADDITIONAL SYMBOLS GUIDE

Z DIRECTION

Next: End

IGNITES BUT DOES NOT ESTABLISH

BEARING PLATE

Next: End

INLET DOES NOT DIP ON IGNITION

BEARING PLATE

Next: End

SPARKING BUT DOES NOT IGNITE

BEARING PLATE

Next: End

BURNER IGNITES BUT BAFFLES OUT

BEARING PLATE

Next: End

DHW TOO COOL

PRIMARY HEAT EXCHANGER

Next: End

LOW FAN PRESSUREPT FAIL

FLUE

Next: End

LOW FAN PRESSUREPT FAIL

FLUEWAYS

Next: End

LOW FAN PRESSUREPT FAIL

BEARING PLATE

Next: End

PRIMARY TEST

INLET PRESSURE

Next: End

INTERNAL CLOCK2

PCB

Next: End

INTERNAL CLOCK

PCB

Next: End

EXTERNAL CONTROLS INPUT (DHW)

Next: End

EXTERNAL CONTROLS RETURN

Next: End

PUMP - HEAT EXCHANGER NOISY

PCB

Next: End

HEAT EXCHANGER NOISY

CABLE - PUMP

Next: End

DC FAN CONTROL

PCB

Next: End

DHW SENSOR

SENSOR - TEMPERATURE - DHW

Next: End

HARNESS PUMP DC

HARNESS PUMP DC

Next: End

NOISY LIMPET

PUMP

Next: End

DHW NOISY

Next: End

INTERNAL CLOCK2DHW NOISY

PCB

Next: End

INTERNAL CLOCKDHW NOISY

PCB

Next: End

EXTERNAL CONTROLS INPUT (DHW)DHW NOISY

Next: End

EXTERNAL CONTROLS RETURNDHW NOISY

Next: End

LOW FAN PRESSURE

FLUE

Next: End

LOW FAN PRESSURE

FLUEWAYS

Next: End

LOW FAN PRESSURE

BEARING PLATE

Next: End

WEAK POOR CH

PUMP

Next: End

DHW COOL RADS HOT DIVERTER MOTOR SUPPLY

PCB

Next: End

DHW COOL RADS HOT

SET - CABLES (STEPPER MOTOR)

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT DIVERTER MOTOR SUPPLY

PCB

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT

SET - CABLES (STEPPER MOTOR)

Next: End

DHW COOL RADIATORS COOL

SENSOR - TEMPERATURE - DHW

Next: End

DHW FLOW RATE

SERVICE VALVES

Next: End

CH FLOW (PARTIALLY OPEN)

SERVICE VALVES

Next: End

CH FLOW

SERVICE VALVES

Next: End

RADS DO NOT HEAT

SENSOR - PRIMARY (CONTROL)

Next: End

CH MODULATION

SENSOR - PRIMARY (CONTROL)

Next: End

PRE-HEAT

SENSOR - PRIMARY (CONTROL)

Next: End

PUMP OVERRUN

PCB

Next: End

SYPHON

SYPHON

Next: End

ELECTRICAL SAFETY

ELECTRICAL SAFETY CHECKS

Next: End

BLOWN STAND BY MODE AT POWER UP

FUSE (FUSED SPUR)

Next: End

BLOWN STANDBY MODE

FUSE T500L

Next: End

BLOWN STANDBY MODE

PCB MAIN FUSE T2.5H

Next: End

FURTHER IN VESTIGATION F2

Z DIRECTION

Next: End

BURNER IGNITION

TRANSFORMER

Next: End

BURNER BAFFLES OUT

SYPHON

Next: End

BURNER BAFFLES OUT

INLET PRESSURE

Next: End

BURNER BAFFLES OUT

FLUE

Next: End

BURNER DOES NOT ESTABLISH

SYPHON

Next: End

BURNER IGNITES

ELECTRODE ASSEMBLY

Next: End

FLAME SENSE

SET - CABLES (MAIN)

Next: End

BURNER IGNITION

LIMITER - TEMPERATURE (OVERHEAT THERMOSTAT)

Next: End

BURNER IGNITION

LIMITER - TEMPERATURE (SENSOR - FLUE)

Next: End

STSLOW THEN TO TO HIGH SPEED

HARNESS FAN

Next: End

NO SPARK

PCB

Next: End

BURNER DOES NOT IGNITE

SYPHON

Next: End

IGNITION ELECTRODES

ELECTRODE ASSEMBLY

Next: End

FAULT

HARNESS - IGNITION

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

GAS VALVE

SET - CABLES (MAIN)

Next: End

NO GAS PRESSURE DIP

FLUE

Next: End

NO GAS PRESSURE DROP

FLUEWAYS

Next: End

SYSTEM PRESSURE

SYSTEM PRESSURE

Next: End

DHW TOO COOL RADS COLD

PUMP

Next: End

DHW RUNS HOT THEN COLD

SYSTEM PRESSURE

Next: End

DHW RUNS HOT THEN COLD

PUMP

Next: End

RUNS HOT THEN COLD

SENSOR - TEMPERATURE - DHW

Next: End

DHW RUNS HOT THEN COLD

SENSOR - PRIMARY (CONTROL)

Next: End

DHW RUNS HOT THEN COLD

SECONDARY HEAT EXCHANGER

Next: End

CH NOISY

SYSTEM PRESSURE

Next: End

BOILER NOISY

SERVICE VALVES

Next: End

CH NOISY

SENSOR - PRIMARY (CONTROL)

Next: End

BOILER REACHED TEMP SYSTEM HAS NOT

Next: End

CH TEMP LOW

SENSOR - PRIMARY (CONTROL)

Next: End

CH OPERATION COOL

PUMP

Next: End

CH BOILER NOISY

PUMP

Next: End

EXPANSION VESSEL

EXPANSION VESSEL

Next: End

DHW COOL RADS COLD

SYSTEM PRESSURE

Next: End

BURNER IGNITIONRENAME

LIMITER - TEMPERATURE (OVERHEAT THERMOSTAT)

Next: End

BURNER IGNITIONRENAME

LIMITER - TEMPERATURE (SENSOR - FLUE)

Next: End

OVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

OVERHEAT INVESTIGATION

PUMP

Next: End

OVERHEAT INVESTIGATION

Next: End

SENSOR PRIMARY

SENSOR - PRIMARY (CONTROL)

Next: End

OVERHEAT FURTHER INVESTIGATION

LIMITER - TEMPERATURE (OVERHEAT THERMOSTAT)

Next: End

DHW TOO COOL RADS COLD

CABLE - PUMP

Next: End

OVERHEAT INVESTIGATION

CABLE - PUMP

Next: End

DHW OPERATION

HARNESS PUMP DC

Next: End

OVERHEAT INVESTIGATION

HARNESS PUMP DC

Next: End

DC PUMP CONTROL

PCB

Next: End

DC PUMP CONTROL OVERHEAT

PCB

Next: End

NO AC POWER TO PUMP DHW

PCB

Next: End

NO POWER TO PUMP OVERHEATING

PCB

Next: End

FUSE INVESTIGATION RENAME

CABLE - PUMP

Next: End

FURTHER INVESTIGATION FUSE F1 RENAME

FAN ASSEMBLY

Next: End

FURTHER INVESTIGATION RENAME

TRANSFORMER

Next: End

FURTHER INVESTIGATION

SET - CABLES (MAIN)

Next: End

FURTHER INVESTIGATION RENAME

SET - CABLES (MAIN)

Next: End

FUSE BLOWING

HARNESS PUMP DC

Next: End

BLANK FOR FAULT CODES

Z DIRECTION

Next: End

BLANK FOR SEQUENCE OF OPS

Z DIRECTION

Next: End

FOR TYPE OF DIAGNOSTIC PROCEDURE

Z DIRECTION

Next: End

BLANK FOR HEATING OPERATES BUT INVESTIGATION REQUIRED2

Z DIRECTION

Next: End

BLANK FOR FAN DOES NOT RUN AT STARTUP

Z DIRECTION

Next: End

NO LED

PCB

Next: End

A7 FAULT CODE

SENSOR - TEMPERATURE - DHW

Next: End

E2 FAULT CODE

SENSOR - PRIMARY (CONTROL)

Next: End

CODE PLUG

CODE PLUG

Next: End

DOES NOT ESTABLISH

INLET PRESSURE

Next: End

RENAMETURBINE

SET - CABLES (MAIN)

Next: End

FAN DOES NOT RUN

SENSOR - PRIMARY (CONTROL)

Next: End

FAN DOES NOT RUN

SENSOR - TEMPERATURE - DHW

Next: End

FAN RUNS

HARNESS FAN

Next: End

FAN VOLTAGE PCB

PCB

Next: End

FAN DOES NOT RUN

HARNESS FAN

Next: End

B1 INVESTIGATION

CODE PLUG

Next: End

RESET BUTTON STUCK

RESET BUTTON STICKING

Next: End

FA AND F7 FAULT CODE

FLUE

Next: End

F7 AND FA FAULT CODE

SYPHON

Next: End

F7 FA FAULT CODE WATER DAMAGE

PCB

Next: End

F7 AND FA FAULT CODE

ELECTRODE ASSEMBLY

Next: End

F7 AND FA FAULT CODE SOLENOIDS NOT CLOSING

GAS VALVE

Next: End

F7 AND FA FAULT CODE PASSING

GAS VALVE

Next: End

POLARITY INCORRECT

Next: End

F0 FAULT CODE

HARNESS - IGNITION

Next: End

F0 FAULT CODE

SET - CABLES (MAIN)

Next: End

F0 FAULT CODE

TRANSFORMER

Next: End

BLANK FOR HARD RESET PROCESS 2

Z DIRECTION

Next: End

FD WILL NOT RESET

PCB

Next: End

BLANK FOR SERVICE MODE

Z DIRECTION

Next: End

BLANK FOR SE RESET GUIDE

Z DIRECTION

Next: End

BURNER IGNITION

BURNER

Next: End

BURNER DOES NOT IGNITE

GAS VALVE

Next: End

INCORRECT RETURN VOLTAGE

FAN ASSEMBLY

Next: End

SLOW THEN TO HIGH SPEED

FAN ASSEMBLY

Next: End

PRE-HEAT

PCB

Next: End

OUT OF CALIBRATION

LIMITER - TEMPERATURE (SENSOR - FLUE)

Next: End

DHW TOO COOL RADS COLD

PCB

Next: End

DOES NOT ESTABLISH

BURNER

Next: End

NO GAS PRESSURE DROP

BURNER

Next: End

BURNER DOES NOT IGNITE BENT OR CRACKED

BURNER

Next: End

BURNER BAFFLES OUT

BURNER

Next: End

EMISSIONS OUT OF RANGE

GAS VALVE

Next: End

DROPPING OUT ON TRUE MINIMUM

GAS VALVE

Next: End

DHW TOO COOL 2

PCB

Next: End

DHW COOL RADIATORS COOL

SECONDARY HEAT EXCHANGER

Next: End

FLOW RATE

INLET FILTER

Next: End

DROPPING OUT ON TRUE MINIMUMFROM OPS SEQUENCE

GAS VALVE

Next: End

PERFORMANCE ANALYSISFROM OPS SEQUENCE

INLET PRESSURE

Next: End

EMISSIONS OUT OF RANGEFROM OPS SEQUENCE

GAS VALVE

Next: End

LOW FAN PRESSUREPT FAIL

BURNER

Next: End

PT FAIL

GAS VALVE

Next: End

CH OPERATION DHW

Next: End

CH DEMAND 1

INTERNAL CLOCK/WIRELESS CONTROL

Next: End

INTERNAL CONTROLS

HOLIDAY MODE LED

Next: End

CH OPERATION (DHW)

Next: End

HOLIDAY MODE

HOLIDAY MODE LED

Next: End

DHW TOO HOT

PCB

Next: End

HEAT EXCHANGER NOISY

PUMP

Next: End

DC CONTROLER

PUMP

Next: End

HEAT EXCHANGER NOISY

SECONDARY HEAT EXCHANGER

Next: End

DHW COOL RADIATORS HOT

DIVERTER VALVE ASSEMBLY

Next: End

HEAT EXCHANGER NOISY

PRIMARY HEAT EXCHANGER

Next: End

CH OPERATION DHWDHW NOISY

Next: End

CH DEMAND 1DHW NOISY

INTERNAL CLOCK/WIRELESS CONTROL

Next: End

INTERNAL CONTROLSDHW NOISY

HOLIDAY MODE LED

Next: End

CH OPERATION (DHW)DHW NOISY

Next: End

HOLIDAY MODEDHW NOISY

HOLIDAY MODE LED

Next: End

FAN SPEED NOT INCREASING

PCB

Next: End

LOW FAN PRESSURE

BURNER

Next: End

DHW COOL RADS HOT MECHANICAL FAULT

DIVERTER VALVE MOTOR

Next: End

DHW COOL RADS HOT STEPPER VOLTAGE

PCB

Next: End

DHW COOL RADS HOT ELECTRICAL FAULT

DIVERTER VALVE MOTOR

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT MECHANICAL FAULT

DIVERTER VALVE MOTOR

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT STEPPER VOLTAGE

PCB

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT ELECTRICAL FAULT

DIVERTER VALVE MOTOR

Next: End

FLOW RATE

FLOW REGULATOR

Next: End

FLOW RATE

NOZZLES

Next: End

FLOW RATE

SECONDARY HEAT EXCHANGER

Next: End

CH MODULATION

PCB

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION FUSED SPUR

Z DIRECTION

Next: End

FURTHER INVESTIGATION F1

Z DIRECTION

Next: End

FURTHER INVESTIGATION F3

Z DIRECTION

Next: End

BLOWN STANDBY MODE AT POWER UP

FUSE T1.6L

Next: End

TRANSFORMER

PCB

Next: End

BURNER BAFFLES OUT

GAS VALVE

Next: End

FLAME SENSE BURNER IGNITES DOES NOT ESTABLISH

PCB

Next: End

FLAME SENSE

PCB

Next: End

SHORT SPARK

PCB

Next: End

FLUE/OH

SET - CABLES (MAIN)

Next: End

FAN RUNS SLOW THEN TO HIGH SPEED

PCB

Next: End

GAS INLET PRESSURE

INLET PRESSURE

Next: End

GAS VALVE

PCB

Next: End

BURNER IGNITES

GAS VALVE

Next: End

DHW RUNS HOT THEN COLD

PCB

Next: End

CH NOISY

PCB

Next: End

PRIMARY HEAT EX NOISY

PRIMARY HEAT EXCHANGER

Next: End

CH NOISY

Next: End

FAULT2

Next: End

CH TEMP LOW

PCB

Next: End

EXPANSION VESSEL PIPE

EXPANSION VESSEL PIPE

Next: End

SHORT SPARKRENAME

PCB

Next: End

FLUE/OHRENAME

SET - CABLES (MAIN)

Next: End

DHW COOL RADIATORS COOLRENAME

SECONDARY HEAT EXCHANGER

Next: End

DHW TOO COOLRENAME

PRIMARY HEAT EXCHANGER

Next: End

OVERHEAT INVESTIGATION

PCB

Next: End

FLOW RATE

FLOW SENSOR TURBINE

Next: End

DHW TOO COOL

PUMP

Next: End

FURTHER INVESTIGATION OVERHEAT

PUMP

Next: End

DHW TOO COOL RADS COLD NOT RUNNING

PUMP

Next: End

OVERHEAT INVESTIGATION 2

PUMP

Next: End

FURTHER INVESTIGATION FUSE F1 RENAME

PUMP

Next: End

FURTHER INVESTIGATION FUSE F1 RENAME

HARNESS FAN

Next: End

FURTHER INVESTIGATION

GAS VALVE

Next: End

FURTHER INVESTIGATION RENAME

GAS VALVE

Next: End

FURTHER INVESTIGATION 2

PCB-FUSE BLOWN

Next: End

FURTHER INVESTIGATION RENAME

PCB-FUSE BLOWN

Next: End

FUSE BLOWING DC

PUMP

Next: End

BLANK FOR HEATING OPERATES BUT INVESTIGATION REQUIRED

Z DIRECTION

Next: End

BLANK FOR FAULTY LED

Z DIRECTION

Next: End

A7 FAULT CODE

PCB

Next: End

A7 FAULT CODE

SET - CABLES (MAIN)

Next: End

E2 FAULT CODE

PCB

Next: End

E2 FAULT CODE

SET - CABLES (MAIN)

Next: End

ELECTRICAL

FLOW SENSOR TURBINE

Next: End

FAN SIGNAL

PCB

Next: End

FLOW SENSOR FAN RUNS 2

SET - CABLES (MAIN)

Next: End

DHW SENSOR FAN DOES NOT RUN

SET - CABLES (MAIN)

Next: End

FAN DOES NOT RUN

PCB

Next: End

DOES NOT RUN

FAN ASSEMBLY

Next: End

FAN RUNS

FAN ASSEMBLY

Next: End

B1 INVESTIGATION

PCB

Next: End

F7 AND FA FAULT CODE

PCB

Next: End

F0 INVESTIGATION

PCB

Next: End

BLANK FOR HARD RESET PROCESS

Z DIRECTION

Next: End

BLANK FOR FD RESET

Z DIRECTION

Next: End

INLET FILTER BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p11

VOLTAGE BELOW 124 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p1028

VOLTAGE ABOVE 135 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p1027

HEAT EXCHANGER NOISY

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p480

PERFORMANCE READINGS OUT OF RANGE

CHARACTERISTIC TEST FROM PERFORMANCE TEST MAX AND MIN

Next: !p1086

BURNER DROPS OUT WHEN IN MINIMUM OUTPUT MODE

CHARACTERISTIC TEST FROM PERFORMANCE TEST MAX AND MIN

Next: !p1088

DHW TOO COOL, RADIATORS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p646

BURNER DROPS OUT WHEN IN MINIMUM OUTPUT MODE

CHARACTERISTIC TEST FROM PERFORMANCE TEST MAX AND MIN

Next: !p1101

INLET PRESSURE UNSATISFACTORY

CHARACTERISTIC TEST FROM PERFORMANCE ANALYSIS MAX AND MIN WITH INLET 2

Next: !p1103

DHW COOL, RADIATORS HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p113

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p115

BOILER DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION (DHW OPERATION)

Next: p1178

BOILER STILL NOISY

CHARACTERISTIC TEST FROM CH OPERATION (DHW OPERATION)

Next: p1180

FAN SPEED INCREASES PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE FAN MAXIMUM OUTPUT

Next: p1203

FLOW REGULATOR BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p13

FAN SPEED DOES NOT INCREASE PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE FAN MAXIMUM OUTPUT

Next: !p1202

VOLTAGES DO NOT BEHAVE AS DESCRIBED ABOVE ON ONE OR MORE TESTS

CHARACTERISTIC TEST FROM VOLTAGE DIVERTER VALVE PCB DROP RETURN TO 15V

Next: p1218

13V DC PRESENT BUT VOLTAGE DOESNT CHANGE

CHARACTERISTIC TEST FROM VOLTAGE DIVERTER VALVE PCB DROP RETURN TO 15V

Next: !p1220

VOLTAGES DO NOT BEHAVE AS DESCRIBED ABOVE ON ONE OR MORE TESTS

CHARACTERISTIC TEST FROM VOLTAGE DIVERTER VALVE PCB DROP RETURN TO 15V

Next: p1228

13V DC PRESENT BUT VOLTAGE DOESNT CHANGE

CHARACTERISTIC TEST FROM VOLTAGE DIVERTER VALVE PCB DROP RETURN TO 15V

Next: !p1230

NOZZLES BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p15

BOILER NOISY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p594

BOILER REACHES TEMPERATURE, RADIATORS DO NOT HEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p166

BOILER TEMPERATURE AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: p168

FAN RUNS BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p20

FAN RUNS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p22

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p270

FAN RUNS BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p327

FAN RUNS, SLOWS DOWN AND STOPS AFTER 30 SECONDS

CHARACTERISTIC TEST FROM MODE OF FAN OPERATION

Next: p387

AFTER 12/14 SECONDS FAN SPEED INCREASES

CHARACTERISTIC TEST FROM MODE OF FAN OPERATION

Next: p395

INLET PRESSURE DOES NOT DIP DURING SPARKING

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: p445

INLET PRESSURE DROPS AWAY DURING SPARKING

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: !p444

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p582

TEMPERATURE DIFFERNETIAL INCORRECT LOCAL NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL FLOW RETURN CH OPERATION

Next: !p600

DIFFERENTIAL OK SYSTEM NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL FLOW RETURN CH OPERATION

Next: !p602

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p634

OPERATION SATISFACTORY BUT BOILER GOES TO OVERHEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p703

FLOW SENSOR BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p765

240 VOLTS ACROSS PURPLE BROWN OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p917

240 VOLTS ACROSS PURPLE/BROWN ABSENT

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p919

30/07/2013 17:01:44 1309_1_40_1 31/07/2013 10:24:37

31/07/2013 07:58:35

Next: End

INSPECTION FLUE

Next: p1009, !f1012

INSPECTION FLUE

Next: p1017, !f1020

DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS

Next: !p1094, !f1095

PERFORMANCE ANALYSIS MAX AND MIN

<

Next: !p1105, ?1100, ?1102

PRESSURE FAN MAXIMUM OUTPUT

ATTACH PRESSURE GAUG

Next: !p1115, f1108

INSPECTION FLUE

Next: p1109, !f1110

INTERNAL OR EXTERNAL CONTROLS

Next: p1144, f1145

EXTERNAL CONTROLS VOLTAGE (RETURN)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)
EXTERNAL CONTROLS CALLING FOR HEAT

Next: p1146, f1147

EXTERNAL CONTROL VOLTAGE (SEND)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: !p1148, !f1149

HOLIDAY MODE OPERATION

{ONOFFSWITCHON}
CH BOILER THERMOSTAT SET TO MAX

Next: !p1152, !f1153

EXTERNAL CONTROL VOLTAGE (SEND)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: !p1156, !f1157

OBSERVATION REMOVE DC CONNECTOR PUMP RUN

REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE
REMOVE VENT SCREW FROM PUMP.

Next: p1162, f1163

PUMP VOLTAGE

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: p1164, !f1165

EXTERNAL CONTROLS VOLTAGE (RETURN)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)
EXTERNAL CONTROLS CALLING FOR HEAT

Next: p1185, f1186

EXTERNAL CONTROL VOLTAGE (SEND)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: !p1187, !f1188

HOLIDAY MODE OPERATION

{ONOFFSWITCHON}
CH BOILER THERMOSTAT SET TO MAX

Next: !p1191, !f1192

EXTERNAL CONTROL VOLTAGE (SEND)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: !p1195, !f1196

VOLTAGE DIVERTER VALVE PCB RETURN TO 13V

{ONOFFSWITCHON}
N

Next: !p1216, ?1217, ?1219

VOLTAGE DIVERTER VALVE PCB RETURN TO 13V

{ONOFFSWITCHON}
N

Next: !p1226, ?1227, ?1229

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p1041, !f133

PRIMARY SENSOR

REMOVE ORANGE WIRES

Next: !p185, !f186

PRIMARY SENSOR

REMOVE ORANGE WIRES

Next: p1034, !f190

VOLTAGE MAINS POWER INPUT TO APPLIANCE

REMOVE CONTROL BOX COVER IF NECESSARY, USE ISOLATION MAT AS REQUIRED

Next: p200, f201

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p202, f203

FUSE FURTHER INVESTIGATION F1

Next: !p204, !f205

PCB MAIN FUSE T2.5H

REMOVE CONTROL BOX COVER IF NECESSARY

Next: p273, f274

PCB MAIN FUSE T2.5H

Next: !p275, !f276

FUSE T500L

Next: !p279, !f280

FUSE T1.6L

Next: !p283, !f284

HARNESS CONTINUITY (FLAME SENSE)

REMOVE THE ORANGE LE

Next: !p385, !f384

OVERHEAT THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OVERHEAT THERMOSTAT

Next: p390, !f391

INSPECTION FLUE

Next: p1001, !f440

HARNESS CONTINUITY (GAS VALVE)

REMOVE THE BLACK LEA

Next: !p448, !f449

INSPECTION FLUE

Next: p455, !f453

OBSERVATION REMOVE DC CONNECTOR PUMP RUN

REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE
REMOVE VENT SCREW FROM PUMP.

Next: p519, f520

PUMP VOLTAGE

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: p521, !f774

CHECK FLOW COMPONENTS

DRAIN THE DOMESTIC H

Next: p7, ?8, ?10, ?12, ?14

OBSERVATION BOILER RESET

ALLOW BOILER TO COOL

Next: p708, f709

THERMOSTAT RESISTANCE (FLUE/OVERHEAT)

REMOVE CONTROL BOX C

Next: !p710, f711

OVERHEAT THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OVERHEAT THERMOSTAT

Next: p712, !f713

OBSERVATION REMOVE DC CONNECTOR PUMP RUN

REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE
REMOVE VENT SCREW FROM PUMP.

Next: p720, f721

PUMP VOLTAGE

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: p722, !f775

DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS

Next: !p734, f735

INSPECTION EXTERNAL BYPASS

Next: !p736, !f737

SENSOR OVERHEAT AT TEMP

DISCONNECT RED LEADS

Next: !p1039, !f762

RESISTANCE PUMP AND HARNESS

REMOVE PUMP CONNECTOR FROM PCB

Next: p842, f821

PUMP HARNESS CONTINUITY

REMOVE THE PUMP PLUG FROM THE PUMP AND THE PUMP HARNESS CONNECTOR FROM THE PCB

Next: !p822, !f823

RESISTANCE FAN

DISCONNECT FAN CONNECTOR AT FAN

Next: !p826, !f827

RESISTANCE GAS VALVE AND HARNESS PRETTLE/JUNKERS_FUSE

REMOVE THE 20 WAY CONNECTOR FROM THE PCB

Next: !p841, f834

HARNESS CONTINUITY (GAS VALVE)

REMOVE THE BLACK LEA

Next: !p835, !f836

HARNESS CONTINUITY (GAS VALVE)

REMOVE THE BLACK LEA

Next: !p838, !f839

RESISTANCE HARNESS DC PUMP

REMOVE CONDENSE TRAP
DISCONNECT PUMP DC CONNECTION FROM PUMP AS SHOWN ON THE RIGHT.

Next: !p862, !f861

RESISTANCE DHW SENSOR AND HARNESS

REMOVE THE 20 WAY CONNECTOR FROM THE PCB

Next: !p874, f875

RESISTANCE DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p876, !f877

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE THE 20 WAY CONNECTOR FROM THE PCB
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: !p880, f881

RESISTANCE SENSOR TEMP FLOW

REMOVE CONNECTOR FRO

Next: !p882, !f883

VOLTS TO TURBINE

Next: !p903, f904

HARNESS CONTINUITY (TURBINE)

DISCONNECT THE INLIN

Next: !p905, !f906

RESISTANCE SENSOR TEMP FLOW

REMOVE CONNECTOR FRO

Next: !p909, !f910

RESISTANCE DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p912, !f913

INSPECTION KEYED PLUG

LOWER THE FACIA PANEL

Next: !p929, !f928

INSPECTION RESET BUTTON

REMOVE PCB COVER AS NECESSARY

Next: p933, !f932

INSPECTION FLUE

Next: p965, !f971

VOLTAGE POLARITY CHECK

GAIN ACCESS TO PCB AS NECESSARY

Next: p980, !f979

HARD RESET PROCESS

Next: !p989, !f991

INSPECTION FLUEWAYS

REMOVE FLUEWAYS INSPECTION PLATE

Next: p1066, !f1022

INSPECTION FLUEWAYS

REMOVE FLUEWAYS INSPECTION PLATE

Next: p1069, !f1011

INSPECTION FLUEWAYS

REMOVE FLUEWAYS INSPECTION PLATE

Next: p1060, !f1019

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR ST5 FORM THE PCB
DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1032, !f1029

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR ST5 FORM THE PCB
DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1031, !f1030

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p1035, !f1036

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1061, !f1062

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1064, !f1065

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1067, !f1068

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1070, !f1071

DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS
DHW THERMOSTAT TO MAX

Next: !p1092, f1093

INSPECTION FLUEWAYS

REMOVE FLUEWAYS INSPECTION PLATE

Next: p1111, !f1112

PUMP RUNS

REMOVE PUMP VENT SCR

Next: p529, f518

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1113, !f1114

DIVERTER VALVE ACTUATOR OPERATION

REMOVE THE DIVERTER

Next: !p118, f1215

EXTERNAL CONTROLS VOLTAGE (RETURN)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)
EXTERNAL CONTROLS CALLING FOR HEAT

Next: p1154, f1155

INTERNAL CLOCK

REMOVE AND DISCONNECT THE INTERNAL CLOCK OR WIRELESS RECEIVER ASSEMBLY FROM THE BOILER.

Next: !p1150, f1151

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p116, !f117

HOLIDAY MODE OPERATION

{ONOFFSWITCHON}
CH BOILER THERMOSTAT SET TO MAX

Next: !p1158, !f1159

VOLTAGE DC PUMP CONTROL

{ONOFFSWITCHON}
R

Next: p1168, !f1169

PUMP HARNESS CONTINUITY

REMOVE THE PUMP PLUG FROM THE PUMP AND THE PUMP HARNESS CONNECTOR FROM THE PCB

Next: !p1166, !f1167

RESISTANCE HARNESS DC PUMP

REMOVE CONDENSE TRAP
DISCONNECT PUMP DC CONNECTION FROM PUMP AS SHOWN ON THE RIGHT.

Next: !p1170, !f1171

PUMP RUNS (LIMPET TEST)

Next: p1173, !f1174

CH OPERATION

Next: !p1175, ?1177, ?1179

INTERNAL OR EXTERNAL CONTROLS

Next: p1183, f1184

EXTERNAL BYPASS CHECK

Next: !p1181, !f1182

EXTERNAL CONTROLS VOLTAGE (RETURN)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)
EXTERNAL CONTROLS CALLING FOR HEAT

Next: p1193, f1194

INTERNAL CLOCK

REMOVE AND DISCONNECT THE INTERNAL CLOCK OR WIRELESS RECEIVER ASSEMBLY FROM THE BOILER.

Next: !p1189, f1190

HOLIDAY MODE OPERATION

{ONOFFSWITCHON}
CH BOILER THERMOSTAT SET TO MAX

Next: !p1197, !f1198

INSPECTION FLUE

Next: p1204, !f1205

INSPECTION FLUEWAYS

REMOVE FLUEWAYS INSPECTION PLATE

Next: p1206, !f1207

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1208, !f1209

PUMP RUNS (LIMPET TEST)

Next: p606, !f1214

VOLTAGE DIVERTER MOTOR SUPPLY PCB

NO DEMAND
ECO MODE ON (ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: p1221, !f1222

DIVERTER VALVE HARNESS CONTINUITY

REMOVE THE CONNECTOR

Next: !p1223, !f1224

VOLTAGE DIVERTER MOTOR SUPPLY PCB

NO DEMAND
ECO MODE ON (ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: p1231, !f1232

DIVERTER VALVE HARNESS CONTINUITY

REMOVE THE CONNECTOR

Next: !p1233, !f1234

FAN SPEED

ENSURE PLATE HEAT EX

Next: p1091, f131

SERVICE VALVES CH FLOW / RETURN

Next: p175, !f176

SERVICE VALVES CH FLOW / RETURN

Next: p624, !f170

PRIMARY SENSOR

REMOVE ORANGE WIRES

Next: p177, !f178

DIVERTER VALVE ACTUATOR OPERATION

REMOVE THE DIVERTER

Next: p1210, f1225

INLET PRESSURE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT ON GAS VALVE

Next: p365, !f90

FAN RUNS DHW DEMAND

Next: p206, !f869

FURTHER INVESTIGATION LED PROBLEM

Next: !p870, !f871

MODE OF FAN OPERATION

{ONOFFSWITCHON}

Next: p408, ?386, ?394

VOLTAGE AT PCB

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: p898, f272

FUSE T500L

REMOVE CONTROL BOX C

Next: p277, f278

FUSE T1.6L

REMOVE CONTROL BOX C

Next: p281, f282

RESISTANCE TRANSFORMER

REMOVE THE BACK PLATE OF THE CONTROL BOX AND THE TRANSFORMER FROM THE PCB

Next: !p285, !f286

CONDENSATE

Next: p328, !f329

INLET PRESSURE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT ON GAS VALVE

Next: p330, !f331

FLUEWAYS

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p332, f1005

INSPECTION FLUE

Next: !p336, !f337

RECTIFICATION VOLTAGE

GAIN ACCESS TO MAINS TERMINAL STRIP AS NECESSARY
USE ISOLATION MAT AS REQUIRED
NO DEMANDS

Next: p366, f378

CONDENSATE

Next: p370, !f371

FLUEWAYS

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p372, f1013

FLAME SENSE ELECTRODE

REMOVE THE ELECTRODE ASSEMBLY

Next: !p376, !f377

THERMOSTAT RESISTANCE (FLUE/OVERHEAT)

REMOVE CONTROL BOX C

Next: !p388, f389

FLUE THERMOSTAT RESISTANCE

DISCONNECT THE RED LEADS FROM THE FLUE TEMPERATURE THERMOSTAT

Next: !p392, !f393

FAN VOLTAGE CONTROL (PCB)

MOVE CONNECTOR ST5 T

Next: p396, ?1024, ?1026

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR ST5 FORM THE PCB
DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p398, !f399

CONDENSATE

Next: p49, !f428

SPARK ELECTRODES

REMOVE THE ELECTRODE ASSEMBLY

Next: p431, !f432

HARNESS CONTINUITY (SPARKING)

REMOVE THE IGNITION HARNESS FROM THE PCB
AND THE SPARK ELECTRODES

Next: p433, !f434

FLUEWAYS

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p998, f438

GAS VALVE VOLTAGE

REMOVE THE GAS VALVE CONNECTORS FROM THE GAS VALVE.

Next: p450, f447

FLUEWAYS

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: !p451, f452

INSPECTION FLUEWAYS

REMOVE FLUEWAYS INSPECTION PLATE

Next: p1063, !f456

INSPECTION PRESSURE SYSTEM

Next: p1172, !f481

DHW SPARKING

REMOVE SPARK LEADS F

Next: p61, !f400

VOLTAGE DC PUMP CONTROL

{ONOFFSWITCHON}
R

Next: p525, !f772

PUMP HARNESS CONTINUITY

REMOVE THE PUMP PLUG FROM THE PUMP AND THE PUMP HARNESS CONNECTOR FROM THE PCB

Next: !p778, !f767

RESISTANCE HARNESS DC PUMP

REMOVE CONDENSE TRAP
DISCONNECT PUMP DC CONNECTION FROM PUMP AS SHOWN ON THE RIGHT.

Next: !p776, !f769

PUMP RUNS (LIMPET TEST)

Next: p124, !f545

INSPECTION PRESSURE SYSTEM

Next: p584, !f583

PUMP RUNS (LIMPET TEST)

Next: p585, !f588

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: p586, !f589

PRIMARY SENSOR

REMOVE ORANGE WIRES

Next: p587, !f590

DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS
DHW THERMOSTAT TO MAX

Next: !p591, !f593

INSPECTION PRESSURE SYSTEM

Next: p612, !f603

SERVICE VALVES CH FLOW / RETURN

Next: p596, !f604

PRIMARY SENSOR

REMOVE ORANGE WIRES

Next: p597, !f605

DIFFERENTIAL FLOW RETURN CH OPERATION

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS

Next: !p598, ?599, ?601

INSPECTION EXTERNAL BYPASS

Next: !p608, !f607

PRIMARY SENSOR

REMOVE ORANGE WIRES

Next: !p610, !f611

PRESSURE GAS INLET DROP

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p430, ?441, ?443

PUMP RUNS (LIMPET TEST)

Next: p595, !f629

PUMP RUNS (LIMPET TEST)

Next: p609, !f628

INSPECTION VESSEL PRESSURE

BOILER DRAINED AND DISCHARGED

Next: !p635, !f636

INSPECTION PRESSURE SYSTEM

Next: p111, !f682

DHW INLET SERVICE VALVE

Next: !p16, !f17

OVERHEAT THERMOSTAT - FURTHER INVESTIGATION

TESTS SO FAR INDICAT

Next: !p867, !f868

INSPECTION PRESSURE SYSTEM

Next: p716, !f717

FLUE THERMOSTAT RESISTANCE

DISCONNECT THE RED LEADS FROM THE FLUE TEMPERATURE THERMOSTAT

Next: !p714, !f715

PUMP RUNS

REMOVE PUMP VENT SCR

Next: p718, f719

PUMP RUNS (LIMPET TEST)

Next: p730, !f731

VOLTAGE DC PUMP CONTROL

{ONOFFSWITCHON}
R

Next: p726, !f773

PUMP HARNESS CONTINUITY

REMOVE THE PUMP PLUG FROM THE PUMP AND THE PUMP HARNESS CONNECTOR FROM THE PCB

Next: !p779, !f768

RESISTANCE HARNESS DC PUMP

REMOVE CONDENSE TRAP
DISCONNECT PUMP DC CONNECTION FROM PUMP AS SHOWN ON THE RIGHT.

Next: !p777, !f770

DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS
DHW THERMOSTAT TO MAX

Next: p732, f733

OBSERVATION RUN TO MAX TEMP-OVERHEAT OCCUR

ATTACH TEMPERATURE P

Next: p738, f739

PRIMARY SENSOR

REMOVE ORANGE WIRES

Next: !p742, !f743

RESISTANCE FAN AND HARNESS

DISCONNECT FAN CONNECTOR ST5 FROM THE PCB

Next: p824, f825

RESISTANCE TRANSFORMER

REMOVE THE BACK PLATE OF THE CONTROL BOX AND THE TRANSFORMER FROM THE PCB

Next: p831, !f829

OBSERVATION PRETTLE/JUNKERS OR SIT GAS VALVE

Next: p832, f833

RESISTANCE GAS VALVE SOLENOID MAIN AND HARNESS SIT_FUSE

REMOVE THE 20 WAY CONNECTOR FROM THE PCB

Next: !p840, f837

RESISTANCE PUMP AND HARNESS DC

REMOVE THE PUMP DC CONNECTOR FROM THE PCB

Next: p820, f860

INSPECTION KEYED PLUG

LOWER THE FACIA PANEL

Next: p900, !f899

VOLTS FROM TURBINE

Next: p901, f902

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE THE 20 WAY CONNECTOR FROM THE PCB
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: p907, f908

RESISTANCE DHW SENSOR AND HARNESS

REMOVE THE 20 WAY CONNECTOR FROM THE PCB

Next: p914, f911

VOLTAGE FAN (AT PCB)

NO DEMANDS
MOVE CONNECTOR ST5 UNTIL PCB CONNECTION STRIPS ARE EXPOSED

Next: p915, ?916, ?918

VOLTAGE FAN (PCB DEMAND)

NO DEMANDS
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY AND MAKE SAFE

Next: p922, !f923

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR ST5 FORM THE PCB
DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p920, !f921

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR ST5 FORM THE PCB
DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p924, !f925

OBSERVATION BOILER RESET FOR FD

NO DEMANDS

Next: !p992, !f993

CONDENSATE

Next: p966, !f972

INSPECTION PCB DRY

GAIN ACCESS TO PCB CONNECTIONS AS NECESSARY

Next: p967, !f973

FLAME SENSE ELECTRODE

REMOVE THE ELECTRODE ASSEMBLY

Next: p968, !f974

PRESSURE STANDING RETURN

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p969, !f975

INSTALLATION TIGHTNESS TEST

Next: !p970, !f976

HARNESS CONTINUITY (SPARKING)

REMOVE THE IGNITION HARNESS FROM THE PCB
AND THE SPARK ELECTRODES

Next: p981, !f984

HARNESS CONTINUITY (FLAME SENSE)

REMOVE THE ORANGE LE

Next: p982, !f985

RESISTANCE TRANSFORMER

REMOVE THE BACK PLATE OF THE CONTROL BOX AND THE TRANSFORMER FROM THE PCB

Next: !p983, !f986

INSPECTION BURNER

REMOVE THE BURNER ASSEMBLY FROM THE APPLIANCE

Next: !p1000, !f999

System Information

Total Tests: 514

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control