XSol Diagnostic System

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

FLUE GAS ANALYSIS MAX AND MIN

UNCLIP DIVERTER VALVE HEAD FROM THE BODY AND LEAVE IN A SAFE LOCATION

Next: &1292, ?1085, ?1087

PRESSURE GAS INLET

ATTACH U GAUGE TO GA

Next: &1084, !f1117

DOES THE PUMP RUN - PRE HEAT

ENSURE PRIMARY HEAT

Next: &18, f1251

CH DEMAND

HOLIDAY MODE OFF (BU

Next: &107, f1293

F0 WITH RESET FLASHING - RESET FACTORY SETTINGS

Next: &nff, !f1400

RESET FACTORY SETTINGS

Next: &nff, !f1556

RESET FACTORY SETTINGS (PCB)

Next: &nff, !f1582

C6 FAN FAULT

HEADER FOR FAULT CODE - NOT USED

Next: &nff, f1684

INFORMATION FAN PCB REMOVAL

REMOVE AIR INTAKE HO

Next: &nff, !f1779

INFORMATION FAN DEMAND VOLTAGE

THE PWM OR (DEMAND/S

Next: &nff, !f1907

NEW QADAI OPTIONS

Next: &nff, ?1909, ?1911, ?1913, ?1915, ?1917, ?1919, ?1921, ?1923, ?1925, ?1927, ?1929, ?1931, ?1933, ?1935, ?1937, ?1939

INFORMATION SERVICE / ADDITIONAL INFO

PLEASE SELECT FROM OPTIONS BELOW:

Next: &nff, !f1981

INFORMATION CASE REMOVAL (DETAILED)

CASE REMOVAL<

Next: &nff, !f1983

HARD RESET PROCESS (QADAI)

Next: &nff, !f1985

RESET FACTORY SETTINGS (QADAI)

Next: &nff, !f1987

PRESSURE FAN MAXIMUM OUTPUT (QADAI)

ATTACH PRESSURE GAUG

Next: &nff, f1989

BLANK FOR ADDITIONAL SYMBOLS GUIDE

Z DIRECTION

Next: End

PRIMARY TEST

INLET PRESSURE

Next: End

DHW SENSOR

SENSOR - TEMPERATURE - DHW

Next: End

NOISY LIMPET

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

PUMP - HEAT EXCHANGER NOISY

PCB

Next: End

HEAT EXCHANGER NOISY

CABLE - PUMP

Next: End

NO PUMP PRE HEAT

SENSOR - TEMPERATURE

Next: End

NO PUMP PRE HEAT

SENSOR - TEMPERATURE - DHW

Next: End

PUMP PULSES

SYSTEM PRESSURE

Next: End

PULSES ON OFF

PUMP

Next: End

PUMP PULSING

PRIMARY HEAT EXCHANGER

Next: End

PUMP PULSES 2

SENSOR - TEMPERATURE

Next: End

PUMP PULSES 2

SENSOR - TEMPERATURE - DHW

Next: End

INTERNAL CLOCK2

PCB

Next: End

INTERNAL CLOCK

PCB

Next: End

EXTERNAL CONTROLS INPUT (DHW)

Next: End

EXTERNAL CONTROLS RETURN

Next: End

DHW NOISY

Next: End

DHW TOO COOL RADS COLD

PUMP

Next: End

DHW TOO COOL

PRIMARY HEAT EXCHANGER

Next: End

PUMP OVERRUN

HARNESS PUMP DC

Next: End

FAULT

LEAD - IGNITION

Next: End

RESET FACTORY SETTINGS

Z DIRECTION

Next: End

HARNESS PUMP DC

HARNESS PUMP DC

Next: End

OVERHEAT INVESTIGATION

HARNESS PUMP DC

Next: End

CH OPERATION

DIVERTER VALVE ASSEMBLY

Next: End

WEAK POOR CH

PUMP

Next: End

BOILER REACHED TEMP SYSTEM HAS NOT

Next: End

PERFORMANCE TEST FAIL

AIR INTAKE FAN

Next: End

LOW FAN PRESSURE

FLUE

Next: End

LOW FAN PRESSURE

FLUEWAYS

Next: End

LOW FAN PRESSURE

PLATE - BEARING

Next: End

PRESSURE FAN MAX O/P

SYPHON

Next: End

FURTHER INVESTIGATION RENAME

TRANSFORMER

Next: End

FURTHER INVESTIGATION

SET - CABLES (MAIN)

Next: End

FURTHER INVESTIGATION RENAME

SET - CABLES (MAIN)

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

POOR FAN PRESSURE

FLUEWAYS

Next: End

SPARKING BUT DOES NOT IGNITE

PLATE - BEARING

Next: End

NO IGNITION

AIR INTAKE FAN

Next: End

BURNER DOES NOT IGNITE

LIMITER - TEMPERATURE (OVERHEAT THERMOSTAT)

Next: End

BURNER DOES NOT IGNITE

LIMITER - TEMPERATURE (SENSOR - FLUE)

Next: End

DHW COOL RADS COOL

PLUMBING ISSUE

Next: End

NO GAS PRESSURE DIP

FLUE

Next: End

NO GAS PRESSURE DROP

FLUEWAYS

Next: End

INLET DOES NOT DIP ON IGNITION

PLATE - BEARING

Next: End

NO IGNITION 2

AIR INTAKE FAN

Next: End

BURNER DOES NOT IGNITE 2

LIMITER - TEMPERATURE (OVERHEAT THERMOSTAT)

Next: End

BURNER DOES NOT IGNITE 2

LIMITER - TEMPERATURE (SENSOR - FLUE)

Next: End

RESET FACTORY SETTINGS 2

Z DIRECTION

Next: End

DHW COOL RADIATORS COOL

SENSOR - TEMPERATURE - DHW

Next: End

DHW TOO COOL RADS COLD

PCB

Next: End

RESET FACTORY SETTINGS 3

Z REDIRECTION

Next: End

NO VOLTAGE TO DC PUMP

PCB

Next: End

BLOWN FUSE

FAN ASSEMBLY

Next: End

BLOWN FUSE 2

FAN ASSEMBLY

Next: End

BLOCKED

IMPULSE TUBE GAS VALVE

Next: End

LOW FAN PRESSURE BAFFLING OUT

FLUE

Next: End

BURNER IGNITES BUT BAFFLES

FLUEWAYS

Next: End

BURNER IGNITES BUT BAFFLES OUT

PLATE - BEARING

Next: End

BURNER BAFFLES OUT

AIR INTAKE FAN

Next: End

BURNER BAFFLES OUT

FLUE

Next: End

LEAKING

WATER COMPONENTS

Next: End

F7 AND FA FAULT CODE SOLENOIDS NOT CLOSING

GAS VALVE

Next: End

F7 AND FA FAULT CODE PASSING

GAS VALVE

Next: End

F7 AND FA FAULT CODE

SET - ELECTRODES

Next: End

NO GAS

IMPULSE TUBE GAS VALVE

Next: End

RESTRICTED

IMPULSE TUBE GAS VALVE

Next: End

SHORTING TO EARTH

SET - CABLES (MAIN)

Next: End

FLAME SENSE

SET - CABLES (MAIN)

Next: End

BURNER IGNITION & ESTABLISH

SET - ELECTRODES

Next: End

BURNER DOES NOT ESTABLISH

SYPHON

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

FLUE

Next: End

IGNITES BUT DOES NOT ESTABLISH

FLUEWAYS

Next: End

IGNITES BUT DOES NOT ESTABLISH

PLATE - BEARING

Next: End

BURNER DOESNT ESTABLISH

AIR INTAKE FAN

Next: End

BURNER IGNITES

SET - ELECTRODES

Next: End

DHW FLOW RATE

SERVICE VALVES

Next: End

CH FLOW (PARTIALLY OPEN)

SERVICE VALVES

Next: End

PUMP OVERRUN

PCB FACTORY RESET

Next: End

FAN DOES NOT RUN - NEW STYLE

HARNESS FAN

Next: End

FAN VOLTAGE PCB - NEW STYLE FAN

PCB

Next: End

FAN RUNS - NEW STYLE

HARNESS FAN

Next: End

FAN RUNS

HARNESS FAN

Next: End

DOES NOT RUN

FAN ASSEMBLY

Next: End

FAN VOLTAGE PCB

PCB

Next: End

FAN DOES NOT RUN

HARNESS FAN

Next: End

FAN RUNS

FAN ASSEMBLY

Next: End

BETWEEN 125 VAC AND 135 VAC - NEW STYLE

HARNESS FAN

Next: End

ABOVE 135 VAC - NEW STYLE

HARNESS FAN

Next: End

CH FLOW

SERVICE VALVES

Next: End

STSLOW THEN TO TO HIGH SPEED - NEW STYLE

HARNESS FAN

Next: End

BETWEEN 125 VAC AND 135 VAC

HARNESS FAN

Next: End

ABOVE 135 VAC

HARNESS FAN

Next: End

SLOW THEN TO HIGH SPEED

FAN ASSEMBLY

Next: End

STSLOW THEN TO TO HIGH SPEED

HARNESS FAN

Next: End

BELOW 124 VAC

FAN ASSEMBLY

Next: End

INFORMATION FAN PCB REMOVAL

Z DIRECTION

Next: End

RADS DO NOT HEAT

SENSOR - TEMPERATURE

Next: End

VOLATILE LOCKOUT FAN RUNS 1 - NEW STYLE

HARNESS FAN

Next: End

VOLATILE LOCKOUT FAN RUNS 1 - NEW STYLE FAN

PCB

Next: End

VOLATILE LOCKOUT FAN RUNS - NEW STYLE

HARNESS FAN

Next: End

FAN RUNS1 FAULT CODE

HARNESS FAN

Next: End

FAN VOLTAGE PCB1 FAULT CODE

PCB

Next: End

FAN DOES NOT RUN1 FAULT CODE

HARNESS FAN

Next: End

FAN RUNS1 FAULT CODE

FAN ASSEMBLY

Next: End

VOLATILE LOCKOUT BETWEEN 125 VAC AND 135 VAC - NEW STYLE

HARNESS FAN

Next: End

VOLATILE LOCKOUT ABOVE 135 VAC - NEW STYLE

HARNESS FAN

Next: End

VOLATILE LOCKOUT STSLOW THEN TO TO HIGH SPEED - NEW STYLE

HARNESS FAN

Next: End

CH MODULATION

SENSOR - TEMPERATURE

Next: End

VOLATILE LOCKOUT BETWEEN 125 VAC AND 135 VAC

HARNESS FAN

Next: End

VOLATILE LOCKOUT ABOVE 135 VAC

HARNESS FAN

Next: End

VOLATILE LOCKOUT SLOW THEN TO HIGH SPEED

FAN ASSEMBLY

Next: End

VOLATILE LOCKOUT STSLOW THEN TO TO HIGH SPEED

HARNESS FAN

Next: End

VOLATILE LOCKOUT BELOW 124 VAC

FAN ASSEMBLY

Next: End

FUSE INVESTIGATION - INCOMPATIBLE

FAN ASSEMBLY

Next: End

FURTHER INVESTIGATION FUSE F1

FAN ASSEMBLY

Next: End

DOES NOT RUN1 FAULT CODE

FAN ASSEMBLY

Next: End

240V ON ALL FAN CONNECTIONS

PCB

Next: End

240V ON ALL FAN CONNECTIONS 2

PCB

Next: End

240V ON ALL FAN CONNECTIONS 4

PCB

Next: End

240V ON ALL FAN CONNECTIONS 3

PCB

Next: End

BLANK FOR FAN DEMAND VOLTAGE INFORMATION

Z DIRECTION

Next: End

ELECTRICAL (QADAI)

FLOW SENSOR ASSEMBLY

Next: End

NO VOLTAGE TO DC PUMP (QADAI)

PCB

Next: End

DIVERTER VOLTAGE (QADAI)

PCB

Next: End

INCORRECT RESISTANCE (QADAI)

MOTOR - DIVERTER VALVE

Next: End

INCORRECT RESISTANCE (QADAI)

TRANSFORMER

Next: End

INCORRECT RESISTANCE (QADAI)

FAN ASSEMBLY

Next: End

SYPHON

SYPHON

Next: End

NO POWER TO PUMP (QADAI)

PCB

Next: End

INCORRECT RESISTANCE (QADAI)

PUMP

Next: End

RESISTANCE WRONG SIT (QADAI)

GAS VALVE

Next: End

NO POWER TO GAS VALVE (QADAI)

PCB

Next: End

RESISTANCE WRONG (PRETTLE)

GAS VALVE

Next: End

QADAI

SENSOR - TEMPERATURE - DHW

Next: End

OUT OF RANGE (QADAI)

SENSOR - TEMPERATURE

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION

Next: End

BLANK FOR DIAGNOSTICS LITE 2

Z DIRECTION

Next: End

BURNER DOES NOT IGNITENO DROP

SET - CABLES (MAIN)

Next: End

INFORMATION SERVICE

Z DIRECTION

Next: End

INFORMATION CASE REMOVAL (DETAILED)

ELECTRICAL SAFETY CHECKS

Next: End

HARD RESET PROCESS (QADAI)

Z DIRECTION

Next: End

RESET FACTORY SETTINGS (QADAI)

Z DIRECTION

Next: End

PRESSURE FAN MAX O/P (QADAI)

SYPHON

Next: End

LOW FAN PRESSURE (QADAI)

FLUE

Next: End

LOW FAN PRESSURE (QADAI)

FLUEWAYS

Next: End

LOW FAN PRESSURE (QADAI)

PLATE - BEARING

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 500MA T0

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 IGNITION

LIMITER - TEMPERATURE (OVERHEAT THERMOSTAT)

Next: End

BURNER IGNITION

LIMITER - TEMPERATURE (SENSOR - FLUE)

Next: End

NO SPARK

PCB

Next: End

BURNER DOES NOT IGNITE

SYPHON

Next: End

SYSTEM PRESSURE

SYSTEM PRESSURE

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 - TEMPERATURE

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 - TEMPERATURE

Next: End

CH TEMP LOW

SENSOR - TEMPERATURE

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 - TEMPERATURE

Next: End

OVERHEAT FURTHER INVESTIGATION

LIMITER - TEMPERATURE (OVERHEAT THERMOSTAT)

Next: End

OVERHEAT INVESTIGATION

CABLE - PUMP

Next: End

NO POWER TO PUMP OVERHEATING

PCB

Next: End

FUSE INVESTIGATION RENAME

CABLE - PUMP

Next: End

BLANK FOR FAULT CODES

Z DIRECTION

Next: End

FOR TYPE OF DIAGNOSTIC PROCEDURE

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 - TEMPERATURE

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 - TEMPERATURE

Next: End

FAN DOES NOT RUN

SENSOR - TEMPERATURE - DHW

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

POLARITY INCORRECT

Next: End

F0 FAULT CODE

LEAD - 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

OUT OF CALIBRATION

LIMITER - TEMPERATURE (SENSOR - FLUE)

Next: End

DROPPING OUT ON TRUE MINIMUM

GAS VALVE

Next: End

FLOW RATE

FILTER - INSERT - DHW

Next: End

DHW TOO HOT

PCB

Next: End

HEAT EXCHANGER NOISY

SECONDARY HEAT EXCHANGER

Next: End

DHW COOL RADIATORS HOT

DIVERTER VALVE ASSEMBLY

Next: End

FAN SPEED NOT INCREASING

PCB

Next: End

DHW COOL RADS HOT MECHANICAL FAULT

MOTOR - DIVERTER VALVE

Next: End

DHW COOL RADS HOT STEPPER VOLTAGE

PCB

Next: End

DHW COOL RADS HOT ELECTRICAL FAULT

MOTOR - DIVERTER VALVE

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT MECHANICAL FAULT

MOTOR - DIVERTER VALVE

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT STEPPER VOLTAGE

PCB

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT ELECTRICAL FAULT

MOTOR - DIVERTER VALVE

Next: End

HEAT EXCHANGER NOISY

PUMP

Next: End

NO PUMP PRE HEAT

SET - CABLES (MAIN)

Next: End

NO PUMP PRE HEAT 2

SET - CABLES (MAIN)

Next: End

PUMP PULSES

SECONDARY HEAT EXCHANGER

Next: End

CH OPERATION DHW

Next: End

FLOW RATE

FLOW REGULATOR

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

HEAT EXCHANGER NOISY

PRIMARY HEAT EXCHANGER

Next: End

DHW COOL RADIATORS COOL

SECONDARY HEAT EXCHANGER

Next: End

PUMP OVERRUN

PCB

Next: End

DC PUMP CONTROL OVERHEAT

PCB

Next: End

FAULT2

Next: End

EMISSIONS OUT OF RANGE

GAS VALVE

Next: End

FAN DOES NOT RUN

FILTER - INSERT - DHW

Next: End

FAN DOES NOT RUN

FLOW REGULATOR

Next: End

FAN DOES NOT RUN

NOZZLES

Next: End

ELECTRICAL

FLOW SENSOR ASSEMBLY

Next: End

FAN PRESSURE 5

FAN ASSEMBLY

Next: End

FURTHER INVESTIGATION FUSE F1 RENAME

HARNESS FAN

Next: End

FURTHER INVESTIGATION

GAS VALVE

Next: End

FURTHER INVESTIGATION RENAME

GAS VALVE

Next: End

FLOW RATE

NOZZLES

Next: End

FAN PRESSURE 2

FAN ASSEMBLY

Next: End

FAN DOES NOT RUN

ADAPTOR - FLOW SENSOR

Next: End

BURNER DOES NOT IGNITE

PCB

Next: End

BURNER DOES NOT IGNITE

SET - CABLES (MAIN)

Next: End

DHW TOO COOL 2

PCB

Next: End

FAN PRESSURE 3

FAN ASSEMBLY

Next: End

BURNER DOES NOT IGNITE 2

SET - CABLES (MAIN)

Next: End

PUMP DOES NOT RUN PREHEAT

PUMP

Next: End

FURTHER INVESTIGATION 2

PCB-FUSE BLOWN

Next: End

FURTHER INVESTIGATION RENAME

PCB-FUSE BLOWN

Next: End

FLOW RATE

SECONDARY HEAT EXCHANGER

Next: End

FAN PRESSURE 4

FAN ASSEMBLY

Next: End

BURNER BAFFLES OUT

GAS VALVE

Next: End

FA AND F7 FAULT CODE

PCB

Next: End

BURNER DOES NOT IGNITE

GAS VALVE

Next: End

IGNITION ELECTRODES

SET - ELECTRODES

Next: End

BURNER IGNITION

BURNER

Next: End

SHORTING TO EARTH

SET - ELECTRODES

Next: End

BURNER DOES NOT ESTABLISH 2

PCB

Next: End

FAN PRESSURE

FAN ASSEMBLY

Next: End

BURNER DOES NOT ESTABLISH

PCB

Next: End

PUMP OVERRUN

PUMP

Next: End

FAN DOES NOT RUN - NEW STYLE FAN

PCB

Next: End

DOES NOT RUN - NEW STYLE

FAN ASSEMBLY

Next: End

FAN RUNS - NEW STYLE

FAN ASSEMBLY

Next: End

FAN DOES NOT RUN

PCB

Next: End

DOES NOT RUN

FAN PCB

Next: End

FAN RUNS

FAN PCB

Next: End

FAN REDUCES AND STOPS - NEW STYLE

PCB

Next: End

SLOW THEN TO HIGH SPEED - NEW STYLE

FAN ASSEMBLY

Next: End

BELOW 124 VAC - NEW STYLE

FAN ASSEMBLY

Next: End

FAN REDUCES AND STOPS

PCB

Next: End

SLOW THEN TO HIGH SPEED

FAN PCB

Next: End

BELOW 124 VAC

FAN PCB

Next: End

VOLATILE LOCKOUT FAN RUNS - NEW STYLE FAN

PCB

Next: End

VOLATILE LOCKOUT FAN RUNS 1- NEW STYLE

FAN ASSEMBLY

Next: End

VOLATILE LOCKOUT FAN RUNS - NEW STYLE

FAN ASSEMBLY

Next: End

FAN DOES NOT RUN1 FAULT CODE

PCB

Next: End

FAN RUNS1 FAULT CODE

FAN PCB

Next: End

CH MODULATION

PCB

Next: End

VOLATILE LOCKOUT FAN REDUCES AND STOPS - NEW STYLE

PCB

Next: End

VOLATILE LOCKOUT SLOW THEN TO HIGH SPEED - NEW STYLE

FAN ASSEMBLY

Next: End

VOLATILE LOCKOUT BELOW 124 VAC - NEW STYLE

FAN ASSEMBLY

Next: End

VOLATILE LOCKOUT FAN REDUCES AND STOPS

PCB

Next: End

VOLATILE LOCKOUT SLOW THEN TO HIGH SPEED

FAN PCB

Next: End

VOLATILE LOCKOUT BELOW 124 VAC

FAN PCB

Next: End

FUSE INVESTIGATION

FAN PCB

Next: End

DOES NOT RUN1 FAULT CODE

FAN PCB

Next: End

STOPPING PRESEQ BREAKING

Z DIRECTION

Next: End

TURBINE VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP SPEED CONTROL VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

DIVERTER VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

DIVERTER VOLTAGE 2 (QADAI)

PCB

Next: End

ELECTRICAL ISSUE (QADAI)

MOTOR - DIVERTER VALVE

Next: End

DIVERTER RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

FLUE THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

DHW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

FLOW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION 2

Z DIRECTION

Next: End

BLANK FOR DIAGNOSICS LITE

Z DIRECTION

Next: End

GAS VALVE NO PRESSURE DROP

GAS VALVE - NO PRESSURE DROP

Next: End

FAN PRESSURE 5 (QADAI)

FAN ASSEMBLY

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

SHORT SPARK

PCB

Next: End

FLUE/OH

SET - CABLES (MAIN)

Next: End

GAS INLET PRESSURE

INLET PRESSURE

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

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 ASSEMBLY

Next: End

OVERHEAT INVESTIGATION 2

PUMP

Next: End

FURTHER INVESTIGATION FUSE F1 RENAME

PUMP

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

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

B1 INVESTIGATION

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 ( FAN DOES RUN)

Next: !p11

HEAT EXCHANGER NOISY

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p480

FGA READINGS OUT OF RANGE

CHARACTERISTIC TEST FROM PERFORMANCE TEST MAX AND MIN

Next: p1422

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

DHW COOL, RADIATORS HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p113

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p115

FAN SPEED INCREASES PRESSURE LOW (E.G. -1.5 MBAR)

CHARACTERISTIC TEST FROM PRESSURE FAN MAXIMUM OUTPUT

Next: p1447

FLOW REGULATOR BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS ( FAN DOES RUN)

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 DOES NOT 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: p1243

13V DC PRESENT BUT VOLTAGE DOES NOT CHANGE

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

Next: !p1245

BOILER RUNS FOR DHW THEN SHUTS DOWN WITH PUMP PULSING

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1281

PUMP DOES NOT OVERRUN

CHARACTERISTIC TEST FROM PUMP OVERRUN

Next: !p1338

PUMP OVERRUNS FOR LONGER THAN 3 MINUTES AND/OR CONTINUOUSLY

CHARACTERISTIC TEST FROM PUMP OVERRUN

Next: p1711

NOZZLES BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS ( FAN DOES RUN)

Next: !p15

INLET FILTER BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS ( FAN DOES RUN)

Next: !p1437

FLOW REGULATOR BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS ( FAN DOES RUN)

Next: !p1439

NOZZLES BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS ( FAN DOES RUN)

Next: !p1441

ADAPTOR - FLOW SENSOR BLOCKED AND/OR POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS ( FAN DOES RUN)

Next: !p1519

BOILER NOISY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p594

ELECTRODE ASSEMBLY POOR CONDITION AND/OR GAP INCORRECT

CHARACTERISTIC TEST FROM INSPECTION BURNER AND ELECTRODE ASSEMBLY

Next: !p1650

BOILER REACHES TEMPERATURE, RADIATORS DO NOT HEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p166

BURNER RESTRICTED/BLOCKED OR IN POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION BURNER AND ELECTRODE ASSEMBLY

Next: !p1652

BOILER TEMPERATURE AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: p168

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1723

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1888

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1735

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1882

VOLTAGE ABOVE 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p1753

VOLTAGE BETWEEN 110 VAC AND 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p1755

VOLTAGE ABOVE 138 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p1765

VOLTAGE BETWEEN 128 VAC AND 138 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p1767

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1785

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1898

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1797

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1892

VOLTAGE ABOVE 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p1849

VOLTAGE BETWEEN 110 VAC AND 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p1851

VOLTAGE ABOVE 138 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p1861

VOLTAGE BETWEEN 128 VAC AND 138 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p1863

FAN RUNS BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p20

DIAGNOSTICS LITE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1910

QUICK ACCESS DATA AND INFORMATION

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1912

HEADER FOR QUICK ACCESS DATA PRIMARY THERMISTOR

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1914

HEADER FOR QUICK ACCESS DATA DHW THERMISTOR

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1916

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE PRETTLE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1918

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1920

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1922

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1924

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1926

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1928

HEADER FOR QUICK ACCESS DATA TRANSFORMER RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1930

HEADER FOR QUICK ACCESS DATA DIVERTER RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1932

HEADER FOR QUICK ACCESS DATA DIVERTER VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1934

NEEDED OR PRESEQ MESSES UP DIVERTER VOLTAGE FOR SOME REASON

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: !p1936

HEADER FOR QUICK ACCESS DATA PUMP SPEED CONTROL VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1938

HEADER FOR QUICK ACCESS DATA TURBINE VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1940

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

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

Next: p1948

13V DC PRESENT BUT VOLTAGE DOES NOT CHANGE

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

Next: !p1950

FAN RUNS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p22

FAN DOES NOT RUN OR FAN PULSING

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: p1748

NO OR VERY SMALL DIP OBSERVED

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: p445

PRESSURE DROPS BELOW A SATISFACTORY LEVEL

CHARACTERISTIC TEST FROM PRESSURE GAS INLET DROP

Next: !p444

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p582

TEMPERATURE DIFFERENTIAL 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

FLOW SENSOR BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p765

07/12/2022 13:05:56 2210_1_50_1 27/01/2023 11:56:03

12/01/2023 07:46:54

Next: End

VOLTAGE DIVERTER VALVE PCB RETURN TO 13VDC

{ONOFFSWITCHON}
N

Next: !p1216, ?1217, ?1219

VOLTAGE DIVERTER VALVE PCB RETURN TO 13VDC

{ONOFFSWITCHON}
N

Next: !p1241, ?1242, ?1244

OBSERVATION REMOVE DC CONNECTOR PUMP RUN

GAIN ACCESS TO THE P

Next: p1262, f1253

PUMP VOLTAGE

REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE

Next: p1254, !f1255

RESISTANCE SENSOR TEMP FLOW

REMOVE CONNECTOR FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: !p1269, !f1270

RESISTANCE DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p1278, !f1279

INTERNAL OR EXTERNAL CONTROLS

Next: p1294, f1295

EXTERNAL CONTROLS VOLTAGE (RETURN)

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

Next: p1296, f1297

EXTERNAL CONTROL VOLTAGE (SEND)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: !p1298, !f1299

HOLIDAY MODE OPERATION

{ONOFFSWITCHON}
CH BOILER THERMOSTAT SET TO MAX

Next: !p1302, !f1303

EXTERNAL CONTROL VOLTAGE (SEND)

GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)

Next: !p1306, !f1307

EXTERNAL BYPASS CHECK

Next: !p1311, !f1312

DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS

Next: !p1322, !f1323

RESISTANCE FAN

DISCONNECT FAN CONNECTOR AT FAN

Next: !p1460, f1874

RESISTANCE GAS VALVE AND HARNESS PRETTLE/JUNKERS

REMOVE ST9 CONNECTOR

Next: p1595, f1467

HARNESS CONTINUITY (GAS VALVE)

REMOVE THE LEADS FRO

Next: !p1468, !f1469

HARNESS CONTINUITY (GAS VALVE)

REMOVE THE LEADS FRO

Next: !p1472, !f1473

INSPECTION FLUE

Next: p1496, !f1497

THERMOSTAT RESISTANCE (FLUE/OVERHEAT)

REMOVE CONTROL BOX C

Next: !p1522, f1523

OVERHEAT THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OVERHEAT THERMOSTAT

Next: p1524, !f1525

INSPECTION FLUE

Next: p1539, !f1540

OVERHEAT THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OVERHEAT THERMOSTAT

Next: p1551, !f1552

INSPECTION FLUE

Next: p1605, !f1606

RESISTANCE ELECTRODE TO EARTH

REMOVE THE LARGE 20 WAY CONNECTOR (ST9) FROM THE RIGHT HAND SIDE OF THE PCB.

Next: p1658, f1659

HARNESS CONTINUITY (FLAME SENSE)

REMOVE THE ORANGE LE

Next: !p1660, !f1661

INSPECTION FLUE

Next: p1670, !f1671

OBSERVATION FAN RUNS

{ONOFFSWITCHON}

Next: p1844, f1780

VOLTAGE FAN (AT PCB) - NEW STYLE

MOVE CONNECTOR ST5 U

Next: p1721, ?1722, ?1724

FAN VOLTAGE CONTROL (PCB) - NEW STYLE

MOVE CONNECTOR ST5 T

Next: p1751, ?1752, ?1754

OBSERVATION FAN TYPE

Next: p1781, f1782

VOLTAGE FAN (AT PCB) - NEW STYLE

MOVE CONNECTOR ST5 U

Next: p1783, ?1784, ?1786

PRIMARY SENSOR

REMOVE ORANGE WIRES FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: !p185, !f186

FAN VOLTAGE CONTROL (PCB) - NEW STYLE

MOVE CONNECTOR ST5 T

Next: p1847, ?1848, ?1850

OBSERVATION FAN TYPE

Next: p1875, !f1876

CONDENSATE

Next: p1990, !f1991

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

OVERHEAT THERMOSTAT RESISTANCE

DISCONNECT RED LEADS FROM THE OVERHEAT THERMOSTAT

Next: p390, !f391

CHECK FLOW COMPONENTS

DRAIN THE DOMESTIC H

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

OBSERVATION BOILER RESET

ENSURE BOILER IS 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

GAIN ACCESS TO THE P

Next: p1411, f721

PUMP VOLTAGE

REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE

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: p1457, f821

PUMP HARNESS CONTINUITY

DISCONNECT THE PUMP HARNESS AT THE PUMP AND THE PCB

Next: !p822, !f823

RESISTANCE DHW SENSOR AND HARNESS

REMOVE ST9 CONNECTOR

Next: !p874, f875

RESISTANCE DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p876, !f877

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE ST9 CONNECTOR

Next: !p880, f881

RESISTANCE SENSOR TEMP FLOW

REMOVE CONNECTOR FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: !p882, !f883

VOLTS TO TURBINE

Next: p1432, f904

HARNESS CONTINUITY (TURBINE)

DISCONNECT THE INLIN

Next: !p905, !f906

RESISTANCE SENSOR TEMP FLOW

REMOVE CONNECTOR FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

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

DIVERTER VALVE ACTUATOR OPERATION

REMOVE THE DIVERTER

Next: !p118, f1215

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p116, !f117

PUMP LIMPET TEST

Next: p1173, !f1174

CH OPERATION

Next: !p1175, f1310

VOLTAGE DIVERTER MOTOR SUPPLY PCB

NO DEMAND
PREHEAT SWITCHED OFF (ECO BUTTON 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
PREHEAT SWITCHED OFF (ECO BUTTON ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: p1246, !f1247

DIVERTER VALVE HARNESS CONTINUITY

REMOVE THE CONNECTOR

Next: !p1248, !f1249

PUMP HARNESS CONTINUITY

DISCONNECT THE PUMP HARNESS AT THE PUMP AND THE PCB

Next: !p1256, !f1257

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE ST9 CONNECTOR

Next: p1271, f1268

RESISTANCE DHW SENSOR AND HARNESS

REMOVE ST9 CONNECTOR

Next: p1407, f1277

INSPECTION PRESSURE SYSTEM

Next: p1282, !f1283

PUMP LIMPET TEST

Next: p1284, !f1285

DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS

Next: p1286, !f1287

RESISTANCE SENSOR TEMP FLOW

REMOVE CONNECTOR FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: p1288, !f1289

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p1290, !f1291

EXTERNAL CONTROLS VOLTAGE (RETURN)

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

Next: p1304, f1305

INTERNAL CLOCK

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

Next: !p1300, f1301

HOLIDAY MODE OPERATION

{ONOFFSWITCHON}
CH BOILER THERMOSTAT SET TO MAX

Next: !p1308, !f1309

PUMP LIMPET TEST

Next: p1314, !f1315

FAN SPEED

ENSURE PLATE HEAT EX

Next: p1316, !f1574

DIFFERENTIAL PLATE HEAT EXCHANGER

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

Next: p1528, f1321

RESISTANCE HARNESS DC PUMP

REMOVE CONDENSE TRAP

Next: !p1680, !f1342

HARNESS CONTINUITY (SPARKING)

REMOVE THE IGNITION HARNESS FROM THE PCB
AND THE SPARK ELECTRODES

Next: p1493, !f1346

RESISTANCE HARNESS DC PUMP

REMOVE CONDENSE TRAP

Next: p1589, !f1409

RESISTANCE HARNESS DC PUMP

REMOVE CONDENSE TRAP

Next: !p1414, !f1413

INSPECTION DIVERTER BODY

REMOVE THE DIVERTER VALVE ACTUATOR FROM THE DIVERTER VALVE BODY

Next: p1416, !f1417

PUMP LIMPET TEST

Next: p1418, !f1419

INSPECTION EXTERNAL BYPASS

Next: !p1420, !f1421

INSPECTION AIR INTAKE FAN

REMOVE AIR INTAKE MANIFOLD FROM THE FAN

Next: !p1423, !f1424

CHECK FLOW COMPONENTS ( FAN DOES RUN)

DRAIN THE DOMESTIC H

Next: !p1446, ?1436, ?1438, ?1440, ?1518

CONDENSATE

Next: p1448, !f1455

INSPECTION FLUE

Next: p1449, !f1450

INSPECTION FLUEWAYS

REMOVE FLUE WAYS INSPECTION PLATE

Next: p1451, !f1452

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1453, !f1454

RESISTANCE FAN AND HARNESS

DISCONNECT FAN CONNECTOR ST5 FROM THE PCB

Next: p1458, f1459

RESISTANCE TRANSFORMER

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

Next: p1462, !f1463

OBSERVATION PRETTLE/JUNKERS OR SIT GAS VALVE

Next: p1464, f1465

RESISTANCE GAS VALVE SOLENOID MAIN AND HARNESS SIT

REMOVE ST9 CONNECTOR

Next: p1592, f1471

FLUEWAYS (FAN PRESSURE IGNITION)

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p1494, f1495

INSPECTION AIR INTAKE FAN

REMOVE AIR INTAKE MANIFOLD FROM THE FAN

Next: p1645, !f1503

INSPECTION FLUEWAYS

REMOVE FLUE WAYS INSPECTION PLATE

Next: p1498, !f1499

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1500, !f1501

FLUE THERMOSTAT RESISTANCE

DISCONNECT THE RED LEADS FROM THE FLUE TEMPERATURE THERMOSTAT

Next: !p1526, !f1527

DHW BOILER TEMPERATURE OUTPUT (MIXER TAP PASSING)

Next: !p1529, !f1530

THERMOSTAT RESISTANCE (FLUE/OVERHEAT)

REMOVE CONTROL BOX C

Next: p1536, f1550

FLUEWAYS (FAN PRESSURE IGNITION)

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p1537, f1538

INSPECTION AIR INTAKE FAN

REMOVE AIR INTAKE MANIFOLD FROM THE FAN

Next: p1977, !f1546

INSPECTION FLUEWAYS

REMOVE FLUE WAYS INSPECTION PLATE

Next: p1541, !f1542

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1543, !f1544

FLUE THERMOSTAT RESISTANCE

DISCONNECT THE RED LEADS FROM THE FLUE TEMPERATURE THERMOSTAT

Next: !p1553, !f1554

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: p1313, !f1573

VOLTAGE PUMP DC DHW DEMAND

REMOVE DC CONNECTOR FROM PUMP.

Next: !p1590, !f1591

OBSERVATION REPLACED FUSE WITH FAN DISCONNECTED

REPLACE THE BLOWN FU

Next: !p1593, !f1594

OBSERVATION REPLACED FUSE WITH FAN DISCONNECTED

REPLACE THE BLOWN FU

Next: !p1596, !f1597

INSPECTION GAS VALVE IMPULSE TUBE

REMOVE GAS VALVE IMPULSE TUBE

Next: p1602, !f1600

FLUEWAYS (FAN PRESSURE IGNITION)

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p1603, f1604

INSPECTION AIR INTAKE FAN

REMOVE AIR INTAKE MANIFOLD FROM THE FAN

Next: p1611, !f1612

INSPECTION FLUEWAYS

REMOVE FLUE WAYS INSPECTION PLATE

Next: p1607, !f1608

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1609, !f1610

INSPECTION FLUE

Next: !p1614, !f1613

INSPECTION WATER COMPONENTS

Next: p1638, !f1628

PRESSURE STANDING RETURN

ATTACH U GAUGE TO INLET PRESSURE TEST POINT
ENSURE NO OTHER GAS APPLIANCES ARE IN OPERATION

Next: p1639, !f1640

INSTALLATION TIGHTNESS TEST

Next: p1641, !f1642

FLAME SENSE ELECTRODE

REMOVE THE ELECTRODE

Next: !p1643, !f1644

INSPECTION GAS VALVE IMPULSE TUBE

REMOVE GAS VALVE IMPULSE TUBE

Next: p1647, !f1646

INSPECTION BURNER AND ELECTRODE ASSEMBLY

REMOVE THE BURNER ASSEMBLY FROM THE APPLIANCE

Next: !p1648, ?1649, ?1651

INSPECTION GAS VALVE IMPULSE TUBE

REMOVE GAS VALVE IMPULSE TUBE

Next: p1655, !f1654

RECTIFICATION VOLTAGE

GAIN ACCESS TO MAINS

Next: p1656, f1657

CONDENSATE

Next: p1666, !f1667

HARNESS CONTINUITY (FLAME SENSE)

REMOVE THE ORANGE LE

Next: p1662, !f1663

SERVICE VALVES CH FLOW / RETURN

Next: p175, !f176

FLAME SENSE ELECTRODE

REMOVE THE ELECTRODE

Next: !p1664, !f1665

FLUEWAYS (FAN PRESSURE IGNITION)

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p1668, f1669

INSPECTION AIR INTAKE FAN

REMOVE AIR INTAKE MANIFOLD FROM THE FAN

Next: p1676, !f1677

INSPECTION FLUEWAYS

REMOVE FLUE WAYS INSPECTION PLATE

Next: p1672, !f1673

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1674, !f1675

FLAME SENSE ELECTRODE

REMOVE THE ELECTRODE

Next: !p1678, !f1679

SERVICE VALVES CH FLOW / RETURN

Next: p624, !f170

RESET FACTORY SETTINGS (PUMP OVERRUN)

Next: p1340, !f1717

OBSERVATION FAN TYPE

Next: p1719, f1720

VOLTAGE FAN (AT PCB)

MOVE CONNECTOR ST5 U

Next: p1732, ?1734, ?1736

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p1728, !f1729

RESISTANCE FAN HARNESS

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

Next: !p1726, !f1727

RESISTANCE FAN HARNESS

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

Next: !p1730, !f1731

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p1742, !f1743

RESISTANCE FAN HARNESS

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

Next: p1738, !f1739

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1740, !f1741

RESISTANCE FAN HARNESS

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

Next: p1744, !f1745

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1746, !f1747

OBSERVATION FAN TYPE

Next: p1749, f1750

FAN VOLTAGE CONTROL (PCB)

MOVE CONNECTOR ST5 T

Next: p1762, ?1764, ?1766

PRIMARY SENSOR

REMOVE ORANGE WIRES FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: p177, !f178

RESISTANCE FAN HARNESS

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

Next: !p1760, !f1761

RESISTANCE FAN HARNESS

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

Next: !p1758, !f1759

RESISTANCE FAN HARNESS

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

Next: !p1756, !f1757

RESISTANCE FAN HARNESS

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

Next: p1774, !f1775

RESISTANCE FAN HARNESS

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

Next: p1770, !f1771

RESISTANCE FAN HARNESS

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

Next: !p1768, !f1769

DIVERTER VALVE ACTUATOR OPERATION

REMOVE THE DIVERTER

Next: p1415, f1240

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1772, !f1773

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1776, !f1777

VOLTAGE FAN (AT PCB)

MOVE CONNECTOR ST5 U

Next: p1794, ?1796, ?1798

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p1790, !f1791

RESISTANCE FAN HARNESS

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

Next: !p1788, !f1789

RESISTANCE FAN HARNESS

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

Next: !p1792, !f1793

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p1806, !f1807

RESISTANCE FAN HARNESS

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

Next: p1879, !f1801

RESISTANCE FAN HARNESS

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

Next: p1808, !f1809

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1810, !f1811

OBSERVATION FAN TYPE

Next: p1845, f1846

FAN VOLTAGE CONTROL (PCB)

MOVE CONNECTOR ST5 T

Next: p1858, ?1860, ?1862

RESISTANCE FAN HARNESS

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

Next: !p1856, !f1857

RESISTANCE FAN HARNESS

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

Next: !p1854, !f1855

RESISTANCE FAN HARNESS

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

Next: !p1852, !f1853

RESISTANCE FAN HARNESS

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

Next: p1870, !f1871

RESISTANCE FAN HARNESS

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

Next: p1866, !f1867

RESISTANCE FAN HARNESS

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

Next: !p1864, !f1865

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1868, !f1869

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1872, !f1873

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1877, !f1878

INSPECTION FAN

REMOVE AIR INTAKE HO

Next: !p1880, !f1881

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p1737, !f1902

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p1725, !f1903

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p1799, !f1905

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p1787, !f1904

DIAGNOSTICS LITE

DIAGNOSIS RELIES ON

Next: !p1975, !f1976

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW SHOW

Next: !p1973, !f1974

PRIMARY SENSOR

REMOVE ORANGE WIRES FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: !p1971, !f1972

RESISTANCE DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: !p1969, !f1970

RESISTANCE GAS VALVE AND HARNESS PRETTLE/JUNKERS

REMOVE ST9 CONNECTOR

Next: !p1967, !f1968

GAS VALVE VOLTS AT PCB

REMOVE THE GAS VALVE

Next: !p1965, !f1966

RESISTANCE GAS VALVE SOLENOID MAIN AND HARNESS SIT

REMOVE ST9 CONNECTOR

Next: !p1963, !f1964

RESISTANCE PUMP AND HARNESS

REMOVE PUMP CONNECTOR FROM PCB

Next: !p1961, !f1962

PUMP VOLTAGE

REMOVE THE DC PUMP CONNECTOR FROM THE PCB AND MAKE SAFE

Next: !p1959, !f1960

RESISTANCE FAN

DISCONNECT FAN CONNECTOR AT FAN

Next: !p1957, !f1958

RESISTANCE TRANSFORMER

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

Next: !p1955, !f1956

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE ST17 CONNECTO

Next: !p1953, !f1954

VOLTAGE DIVERTER VALVE PCB RETURN TO 13VDC

{ONOFFSWITCHON}
N

Next: !p1945, ?1947, ?1949

VOLTAGE PUMP DC DHW DEMAND

REMOVE DC CONNECTOR FROM PUMP.

Next: !p1943, !f1944

VOLTS FROM TURBINE

TURN HOT WATER TAP ON WITH A FLOW RATE OF APPROXIMATELY 3 L/MIN

Next: !p1941, !f1942

VOLTAGE DIVERTER MOTOR SUPPLY PCB

NO DEMAND
PREHEAT SWITCHED OFF (ECO BUTTON ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: !p1951, !f1952

HARNESS CONTINUITY (GAS VALVE)

REMOVE THE LEADS FRO

Next: !p1978, !f1979

INSPECTION FLUE

Next: p1992, !f1993

INSPECTION FLUEWAYS

REMOVE FLUE WAYS INSPECTION PLATE

Next: p1994, !f1995

INSPECTION BEARING PLATE

REMOVE FAN ASSEMBLY

Next: !p1996, !f1997

INLET PRESSURE

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

Next: p1653, !f90

FAN RUNS 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: p1598, !f331

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

CONDENSATE

Next: p49, !f428

GAS VALVE VOLTS AT PCB

REMOVE THE GAS VALVE

Next: p1535, f1521

INSPECTION PRESSURE SYSTEM

Next: p1172, !f481

DHW SPARKING

REMOVE SPARK LEADS F

Next: p61, !f400

INSPECTION PRESSURE SYSTEM

Next: p584, !f583

PUMP LIMPET TEST

Next: p585, !f588

DHW SENSOR

REMOVE ORANGE WIRES FROM DHW SENSOR

Next: p586, !f589

PRIMARY SENSOR

REMOVE ORANGE WIRES FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

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 FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: p597, !f605

DIFFERENTIAL FLOW RETURN CH OPERATION

ATTACH TEMPERATURE PROBES AS INDICATED BY THE RED ARROWS

Next: !p598, ?599, ?601

PRIMARY SENSOR

REMOVE ORANGE WIRES FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: !p610, !f611

PRESSURE GAS INLET DROP

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p1344, ?441, ?443

PUMP LIMPET TEST

Next: p595, !f629

PUMP LIMPET TEST

Next: p609, !f628

INSPECTION VESSEL PRESSURE

BOILER DRAINED AND DISCHARGED

Next: !p635, !f636

INSPECTION PRESSURE SYSTEM

Next: p1559, !f682

DHW INLET SERVICE VALVE

Next: !p16, !f17

INSPECTION PRESSURE SYSTEM

Next: p716, !f717

FLUE THERMOSTAT RESISTANCE

DISCONNECT THE RED LEADS FROM THE FLUE TEMPERATURE THERMOSTAT

Next: !p714, !f715

PUMP RUNS

Next: p718, f719

PUMP LIMPET TEST

Next: p730, !f731

PUMP HARNESS CONTINUITY

DISCONNECT THE PUMP HARNESS AT THE PUMP AND THE PCB

Next: !p779, !f768

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 FROM PRIMARY SENSOR
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 60° C

Next: !p742, !f743

INSPECTION KEYED PLUG

LOWER THE FACIA PANEL

Next: p900, !f899

VOLTS FROM TURBINE

TURN HOT WATER TAP ON WITH A FLOW RATE OF APPROXIMATELY 3 L/MIN

Next: p901, f902

RESISTANCE SENSOR TEMP FLOW AND HARNESS

REMOVE ST9 CONNECTOR

Next: p907, f908

RESISTANCE DHW SENSOR AND HARNESS

REMOVE ST9 CONNECTOR

Next: p1718, f911

OBSERVATION BOILER RESET FOR FD

NO DEMANDS

Next: !p992, !f993

CONDENSATE

Next: p1618, !f972

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

System Information

Total Tests: 731

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control

XSol Diagnostic System - Generated from extracted test data