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:

VOKERA UNICA I32

WARNING - IMPORTA

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

VOKERA UNICA I32

Next: &1142, !f41

HOW TO CANCEL PUMP PURGE CYCLE

CH & DHW TEMPERATURE

Next: &44, !f43

TYPE OF DIAGNOSTIC PROCEDURE

Next: &46, !f45

OBSERVATION DHW FLOW RATE

Next: &114, f47

OBSERVATION BOILER SELF CHECK

CH & DHW TEMPERATURE CONTROLS SET TO MAX

Next: &42, ?110, ?1021, ?1134

OBSERVATION FAN RUNS DHW DEMAND

Next: &827, f764

OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: &548, ?116, ?184, ?216, ?1283

A01 - IGNITION FAILURE - DUMMY GO TO BURNER IGNITES

OUTSIDE MODEL

Next: &nff, !f285

A11 - FALSE FLAME

OUTSIDE MODEL

Next: &nff, f272

A09 - FLUE THERMISTOR FAULT

Next: &nff, f286

A08 - RETURN THERMISTOR FAULT, TEMP DIFF INVERTED

OUTSIDE MODEL

Next: &nff, f315

A07 - PRIMARY (FLOW) THERMISTOR FAULT, TEMPERATURE DIFFERENTIAL

OUTSIDE MODEL

Next: &nff, f348

A06 - DHW THERMISTOR FAULT

OUTSIDE MODEL

Next: &nff, f265

A04 - INSUFFICIENT WATER PRESSURE

OUTSIDE MODEL

Next: &nff, f381

A03 - FAN TACHO SIGNAL FAULT

OUTSIDE MODEL

Next: &nff, f475

A02 - LIMIT THERMOSTAT FAILURE

OUTSIDE MODEL

Next: &nff, f434

HOW TO CANCEL PUMP PURGE CYCLE - FAULT CODES

CH & DHW TEMPERATURE

Next: &nff, !f510

DISABLE PREHEAT FUNCTION

Next: &nff, !f512

FUSE FURTHER INVESTIGATION

OUTSIDE MODEL

Next: &nff, f514

PRESSURE GAS INLET (DHW DEMAND)

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: &550, !f549

DHW OPERATION

Next: &656, ?551, ?553, ?555, ?557

DHW PREHEAT OPERATION

ENSURE THERE IS A DEMAND FOR PREHEAT, BOILER COOL

Next: &712, !f982

CH OPERATION

Next: &nff, ?713, ?715, ?717, ?719

OBSERVATION PUMP RUNS

Next: &115, f828

OBSERVATION DISPLAY ILLUMINATES

Next: &59, ?1143, ?1145, ?1147

DIAGNOSTICS LITE

DIAGNOSIS RELIES ON

Next: &nff, !f1290

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW

Next: &nff, !f1292

HEADER FOR QUICK ACCESS DATA FLOW THERMISTOR

OUTSIDE MODEL

Next: &nff, f1294

HEADER FOR QUICK ACCESS DATA RETURN THERMISTOR

OUTSIDE MODEL

Next: &nff, f1298

HEADER FOR QUICK ACCESS DATA DHW THERMISTOR

Next: &nff, f1302

HEADER FOR QUICK ACCESS DATA FLUE THERMISTOR

Next: &nff, f1306

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE

OUTSIDE MODEL

Next: &nff, f1310

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE

OUTSIDE MODEL

Next: &nff, f1314

HEADER FOR QUICK ACCESS DATA FAN VOLTAGE

OUTSIDE MODEL

Next: &nff, f1318

HEADER FOR QUICK ACCESS DATA FAN SPEED CONTROL

OUTSIDE MODEL

Next: &nff, f1322

HEADER FOR QUICK ACCESS DATA FAN SPEED CONTROL RESISTANCE

OUTSIDE MODEL

Next: &nff, f1331

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR RESISTANCE

OUTSIDE MODEL

Next: &nff, f1335

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR VOLTAGE

OUTSIDE MODEL

Next: &nff, f1339

HEADER FOR QUICK ACCESS DATA DIVERTER RESISTANCE

OUTSIDE MODEL

Next: &nff, f1343

HEADER FOR QUICK ACCESS DATA DIVERTER VOLTAGE

OUTSIDE MODEL

Next: &nff, f1347

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE

OUTSIDE MODEL

Next: &nff, f1351

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE

OUTSIDE MODEL

Next: &nff, f1355

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

OUTSIDE MODEL

Next: &nff, f1364

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - SPARK GEN

CABLE - IGNITION (CN1 AND CN3)

Next: End

DHW OPERATION - DHW COOL RADS COOL

HEAT EXCHANGER ASSEMBLY (FLUEWAYS)

Next: End

DHW OPERATION - DHW COOL RADS COOL

BURNER

Next: End

DHW OPERATION - DHW COOL RADS COOL - LPG

HEAT EXCHANGER ASSEMBLY (FLUEWAYS)

Next: End

DHW OPERATION - DHW COOL RADS COOL - LPG

BURNER

Next: End

DHW COOL RADS COOL 2

BY-PASS VALVE

Next: End

OBSERVATION BOILER SELF CHECK - FIRING NO DEMAND

OPEN TAP OR LEAK

Next: End

OBSERVATION BOILER SELF CHECK - FIRING NO DEMAND

FROST PROTECTION

Next: End

OBSERVATION BOILER SELF CHECK - FIRING NO DEMAND - FLOW THERMISTOR

DETECTOR - NTC

Next: End

OBSERVATION BOILER SELF CHECK - FIRING NO DEMAND

SENSOR - NTC

Next: End

DHW RADS BEGIN TO HEAT 2

PCB AKL03

Next: End

DHW RADS BEGIN TO HEAT 2

CABLE - CONTROL - HYDRAULIC (CN4)

Next: End

DHW RADS BEGIN TO HEAT

PCB AKL03

Next: End

DHW RADS BEGIN TO HEAT

CABLE - CONTROL - HYDRAULIC (CN4)

Next: End

CH OPERATION 4

PCB AKL03

Next: End

CH OPERATION 2

CABLE - CONTROL - HYDRAULIC (CN4)

Next: End

CH RADS HEAT 2

CARTRIDGE - 3 WAY VALVE

Next: End

CH OPERATION 3

PUMP

Next: End

CH OPERATION 2

BY-PASS VALVE

Next: End

CH OPERATION 2

PCB AKL03

Next: End

CH OPERATION

PUMP

Next: End

CH OPERATION

CABLE - CONTROL - HYDRAULIC (CN4)

Next: End

CH RADS HEAT

CARTRIDGE - 3 WAY VALVE

Next: End

CH OPERATION

BY-PASS VALVE

Next: End

FAULT CODES 2

Z REDIRECT

Next: End

OBSERVATION BOILER SELF CHECK - FAN RUNS CONSTANTLY

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

OBSERVATION BOILER SELF CHECK - NO DC POWER TO FAN

PCB AKL03

Next: End

OBSERVATION BOILER SELF CHECK - FAN RUNS CONSTANTLY -TELLING FAN TO RUN

PCB AKL03

Next: End

NO DISPLAY LIGHTS FLASHING

PCB AKL03

Next: End

NO DISPLAY LIGHTS FLASHING

HARNESS - WIRING (CN8)

Next: End

OBSERVATION DISPLAY ILLUMINATES - DISPLAY ON NO LEDS

ACTUATOR - DHW

Next: End

FAULTY LEDS

PCB AKL03

Next: End

NO DISPLAY ALL OFF

MAINS FUSE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE

SYPHON

Next: End

NO DISPLAY ALL OFF FUSE IN HOLDER

FUSE

Next: End

NO DISPLAY ALL OFF

HARNESS - WIRING - POWER (CN2)

Next: End

NO DISPLAY ALL OFF PCB FUSE

FUSE

Next: End

OBSERVATION DISPLAY ILLUMINATES

PCB AKL03

Next: End

OBSERVATION BOILER SELF CHECK - NO AC POWER TO FAN

PCB AKL03

Next: End

OBSERVATION BOILER SELF CHECK - FAN DOES NOT KICK

CABLE - IGNITION (CN1 AND CN3)

Next: End

FAULT CODES 3

Z REDIRECT

Next: End

SELF CHECK

PCB AKL03

Next: End

DHW OPERATION 2

PCB AKL03

Next: End

DHW OPERATION 4

PCB AKL03

Next: End

DHW OPERATION 3

PCB AKL03

Next: End

FAULT CODE A03 - NO AC POWER TO FAN

PCB AKL03

Next: End

FAULT CODE A03 - FAN DOES NOT KICK

CABLE - IGNITION (CN1 AND CN3)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO VOLTAGE TO GAS VALVE

PCB AKL03 AND SOLENOID - GAS VALVE

Next: End

BURNER DOES NOT IGNITE

THERMOSTAT - HIGH LIMIT

Next: End

ONLY 1 ATTEMPT TO IGNITE

PRESSURE SWITCH - WATER

Next: End

ONLY 1 ATTEMPT TO IGNITE

THERMOSTAT - HIGH LIMIT

Next: End

BLANK FOR DIAGNOSICS LITE

Z DIRECTION

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION

Next: End

OUT OF RANGE (QADAI)

DETECTOR - NTC

Next: End

OUT OF RANGE (QADAI) 2

DETECTOR - NTC

Next: End

QADAI

SENSOR - NTC

Next: End

QADAI

SENSOR - FLUE

Next: End

NO POWER TO GAS VALVE (QADAI)

PCB AKL03

Next: End

INCORRECT RESISTANCE (QADAI)

PUMP

Next: End

NO POWER TO FAN (QADAI)

PCB AKL03

Next: End

FAULT CODE A03 (QADAI)

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

INCORRECT RESISTANCE SPEED CONTROL (QADAI)

FAN

Next: End

INCORRECT RESISTANCE (QADAI)

TRANSFORMER - IGNITION

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO DROP

COMPENSATION TUBE

Next: End

NO VOLTAGE TO SPARK GEN (QADAI)

PCB AKL03

Next: End

INCORRECT RESISTANCE (QADAI)

ACTUATOR

Next: End

NO VOLTAGE TO DIVERTER (QADAI)

PCB AKL03

Next: End

RESISTANCE WRONG (QADAI)

GAS VALVE

Next: End

NO POWER TO PUMP (QADAI)

PCB AKL03

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO DROP

MIXER

Next: End

INCORRECT RESISTANCE (QADAI)

FAN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO DROP

FLUE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO VOLTAGE TO SPARK GEN

PCB AKL03

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - DROP SEEN

COMPENSATION TUBE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - DROP SEEN

MIXER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO DROP

SOLENOID - GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE

ELECTRODE - IGNITION

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - DROP SEEN

HEAT EXCHANGER ASSEMBLY (FLUEWAYS)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

SYPHON

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

COMPENSATION TUBE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - DROP SEEN

FLUE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

MIXER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

FLUE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

ELECTRODE (DETECTION)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

HEAT EXCHANGER ASSEMBLY (FLUEWAYS)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES OUT

SYPHON

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES OUT

COMPENSATION TUBE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES OUT

GAS INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES OUT

MIXER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES OUT

FLUE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES OUT

HEAT EXCHANGER ASSEMBLY (FLUEWAYS)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES OUT

BURNER

Next: End

FAULT CODE A06

PCB AKL03

Next: End

FAULT CODE A11 2

PCB AKL03

Next: End

FAULT CODE A11

SYPHON

Next: End

FAULT CODE A11

FLUE

Next: End

FAULT CODE A11 2

GAS VALVE

Next: End

FAULT CODE A11 2

ELECTRODE (DETECTION)

Next: End

FAULT CODE A01

Z REDIRECT

Next: End

FAULT CODE A09

SENSOR - FLUE

Next: End

FAULT CODE AO9

PCB AKL03

Next: End

FAULT CODE A09

PCB AKL03

Next: End

FAULT CODE A09 - PUMP

HARNESS - WIRING - POWER (CN2)

Next: End

FAULT CODE A09 2

PUMP

Next: End

FAULT CODE A09

DETECTOR - NTC

Next: End

FAULT CODE A08 2

DETECTOR - NTC

Next: End

FAULT CODE A08

PCB AKL03

Next: End

FAULT CODE A08 2

PCB AKL03

Next: End

FAULT CODE A08 - PUMP

HARNESS - WIRING - POWER (CN2)

Next: End

FAULT CODE A08 2

PUMP

Next: End

FAULT CODE A08

DETECTOR - NTC

Next: End

FAULT CODE A08

HEAT EXCHANGER (WATERWAYS)

Next: End

FAULT CODE A08

VALVE - NON RETURN

Next: End

FAULT CODE A08

DETECTOR - NTC X2

Next: End

FAULT CODE A08 3

PCB AKL03

Next: End

FAULT CODE A07

DETECTOR - NTC

Next: End

FAULT CODE A07

PCB AKL03

Next: End

FAULT CODE A07 2

PCB AKL03

Next: End

FAULT CODE A07 - PUMP

HARNESS - WIRING - POWER (CN2)

Next: End

FAULT CODE A07 2

PUMP

Next: End

FAULT CODE A07 2

DETECTOR - NTC

Next: End

FAULT CODE A07

HEAT EXCHANGER (WATERWAYS)

Next: End

FAULT CODE A07

VALVE - NON RETURN

Next: End

FAULT CODE A07

DETECTOR - NTC X2

Next: End

FAULT CODE A07 3

PCB AKL03

Next: End

FAULT CODE A04

PCB AKL03

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

INFORMATION BOILER SETUP

Z REDIRECT

Next: End

FAULT CODE A02 2

THERMOSTAT - HIGH LIMIT

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

FAULT CODE A02 2

PCB AKL03

Next: End

FAULT CODE A02

HARNESS - WIRING - POWER (CN2)

Next: End

FAULT CODE A02

PUMP

Next: End

FAULT CODE A02 2

DETECTOR - NTC

Next: End

FAULT CODE A02

DETECTOR - NTC

Next: End

FAULT CODE A02

SENSOR - NTC

Next: End

FAULT CODE A02

HEAT EXCHANGER (WATERWAYS)

Next: End

FAULT CODE A02

VALVE - NON RETURN

Next: End

FAULT CODE A02

PCB AKL03

Next: End

OBSERVATION DHW FLOW RATE

STOP COCK - WATER SUPPLY

Next: End

FAULT CODE A03 5- FAN NEED TO CHECK WHAT ITS SUPPOSED TO BE

HARNESS - WIRING - POWER (CN2)

Next: End

OBSERVATION DHW FLOW RATE

WATER SUPPLY

Next: End

FAULT CODES

Z REDIRECT

Next: End

DISABLE PREHEAT

Z REDIRECT

Next: End

FUSE FURTHER INVESTIGATION

PUMP

Next: End

FUSE FURTHER INVESTIGATION

FAN

Next: End

RESISTANCE SPARK GENERATOR

TRANSFORMER - IGNITION

Next: End

FUSE FURTHER INVESTIGATION

ACTUATOR

Next: End

FUSE FURTHER INVESTIGATION

SOLENOID - GAS VALVE

Next: End

FAULT CODE A06 - DHW THERMISTOR

CABLE - LOW TENSION

Next: End

GAS INLET DHW DEMAMD

GAS INLET PRESSURE

Next: End

DHW HOT THEN COOL

PUMP

Next: End

DHW HOT THEN COOL

SENSOR - NTC

Next: End

DHW HOT THEN COOL

DETECTOR - NTC

Next: End

DHW HOT THEN COOL

VALVE - NON RETURN

Next: End

DHW TOO HOT

SENSOR - NTC

Next: End

DHW COOL RADS COOL

PLUMBING ISSUE

Next: End

DHW COOL RADS COOL

PUMP

Next: End

DHW COOL RADS COOL

SENSOR - NTC

Next: End

DHW COOL RADS COOL

DETECTOR - NTC

Next: End

DHW COOL RADS COOL

VALVE - NON RETURN

Next: End

DHW COOL RADS COOL 2

FLUE

Next: End

DHW COOL RADS COOL 2

MIXER

Next: End

DHW COOL RADS COOL

FLUE

Next: End

DHW COOL RADS COOL

MIXER

Next: End

DHW COOL RADS COOL

BY-PASS VALVE

Next: End

CH OPERATION

EXPANSION VESSEL

Next: End

CH OPERATION 2

PUMP

Next: End

CH OPERATION

DETECTOR - NTC

Next: End

CH OPERATION 2

DETECTOR - NTC

Next: End

CH OPERATION

COCK - HEATING

Next: End

OBSERVATION FAN RUNS - NO POWER TO DHW FLOW SENSOR

PCB AKL03

Next: End

OBSERVATION PUMP RUNS - OPEN CIRCUIT TO DHW FLOW SENSOR

CABLE - LOW TENSION

Next: End

OBSERVATION BOILER SELF CHECK - NO POWER TO PUMP

PCB AKL03

Next: End

OBSERVATION BOILER SELF CHECK - NO POWER TO PUMP

HARNESS - WIRING - POWER (CN2)

Next: End

FAN DOES NOT RUN

DETECTOR - NTC

Next: End

FAN DOES NOT RUN 2

DETECTOR - NTC

Next: End

FAN DOES NOT RUN

SENSOR - NTC

Next: End

FAN DOES NOT RUN 2

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

FAULT CODE A03 3

FAN

Next: End

DHW PREHEAT OPERATION

PCB AKL03

Next: End

OBSERVATION FAN RUNS - LWPS

CABLE - LOW TENSION

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE

TRANSFORMER - IGNITION

Next: End

DHW OPERATION - DHW COOL RADS COOL

PCB AKL03

Next: End

DHW COOL RADS COOL 3

PCB AKL03

Next: End

OBSERVATION BOILER SELF CHECK - FIRING NO DEMAND - DHW

PCB AKL03

Next: End

OBSERVATION BOILER SELF CHECK - FIRING NO DEMAND - FROST

PCB AKL03

Next: End

OBSERVATION BURNER IGNITES AND ESTBALISHES - BAFFLES

GAS VALVE

Next: End

DHW RADS BEGIN TO HEAT 2

CARTRIDGE - 3 WAY VALVE

Next: End

DHW RADS BEGIN TO HEAT 3

ACTUATOR

Next: End

DHW RADS BEGIN TO HEAT

CARTRIDGE - 3 WAY VALVE

Next: End

DHW RADS BEGIN TO HEAT 2

ACTUATOR

Next: End

CH OPERATION 2

ACTUATOR

Next: End

CH OPERATION 2

Next: End

CH OPERATION

ACTUATOR

Next: End

CH OPERATION

Next: End

OBSERVATION BOILER SELF CHECK - FAN RUNS CONSTANTLY

FAN

Next: End

NO DISPLAY FAULTY MAIN PCB

Z REDIRECT

Next: End

NO DISPLAY LIGHTS FLASHING

KIT - CARD READER

Next: End

OBSERVATION DISPLAY ILLUMINATES - DISPLAY ON NO LEDS

CABLE - LOW TENSION

Next: End

FAULTY LEDS

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES

Next: End

NO DISPLAY MAINS FUSE

Z REDIRECT

Next: End

NO DISPLAY ALL OFF FUSE IN HOLDER

Z REDIRECT

Next: End

NO DISPLAY ALL OFF

PCB AKL03

Next: End

NO DISPLAY ALL OFF PCB FUSE

Z REDIRECT

Next: End

OBSERVATION BOILER SELF CHECK FAULT CODE A03 - NO KICK

FAN

Next: End

FAULT CODES 1

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - DROP SEEN

BURNER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - WARPED

ELECTRODE - IGNITION

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

BURNER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - WARPED

ELECTRODE (DETECTION)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE

GAS INLET PRESSURE

Next: End

DHW OPERATION SELF CHECK

EXTERNAL CONTROLS OR WIRING

Next: End

DHW OPERATION 2

EXTERNAL CONTROLS OR WIRING

Next: End

DHW OPERATION 4

EXTERNAL CONTROLS OR WIRING

Next: End

DHW OPERATION 3

EXTERNAL CONTROLS OR WIRING

Next: End

FAULT CODE A03 - NO KICK

PCB AKL03

Next: End

FAULT CODE A03 - NO KICK

FAN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO VOLTAGE TO GAS VALVE

PCB AKL03

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO VOLTAGE TO GAS VALVE

PCB AKL03 AND HARNESS - WIRING - POWER

Next: End

OBSERVATION DISPLAY ILLUMINATED

FAN

Next: End

ONL Y 1 ATTEMPT TO IGNITE

PCB AKL03

Next: End

FLOW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

RETURN THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

DHW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

FLUE THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAULT CODE A03 (QADAI)

PCB AKL03

Next: End

FAULT CODE A03 2 (QADAI)

PCB AKL03

Next: End

FAN SPEED CONTROL VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN SPEED CONTROL RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

DIVERTER RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

DIVERTER VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

NO DISPLAY

THERMOSTAT - HIGH LIMIT

Next: End

FAN RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO DROP

GAS VALVE

Next: End

NO DISPLAY

PRESSURE SWITCH - WATER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - NO DROP

HARNESS - WIRING - POWER (CN2)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT IGNITE - DROP SEEN

GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

PCB AKL03

Next: End

FAULT CODE A06

SENSOR - NTC

Next: End

FAULT CODE A06

FAULT CODE RESET - RETEST BOILER OPERATION

Next: End

FAULT CODE A11

ELECTRODE (DETECTION)

Next: End

FAULT CODE A11

FAULT CODE RESET - RETEST BOILER OPERATION

Next: End

FAULT CODE A09

PRESSURE GAUGE

Next: End

FAULT CODE A09

SYSTEM PRESSURE

Next: End

FAULT CODE A09

PUMP

Next: End

FAULT CODE A09

FAULT CODE RESET - A09

Next: End

FAULT CODE A09 2

SENSOR - FLUE

Next: End

FAULT CODE A09

HEAT EXCHANGER ASSEMBLY (FLUEWAYS)

Next: End

FAULT CODE A08

PRESSURE GAUGE

Next: End

FAULT CODE A08

SYSTEM PRESSURE

Next: End

FAULT CODE A08

PUMP

Next: End

FAULT CODE A08

HEAT EXCHANGER (PLATE)

Next: End

FAULT CODE A08

FAULT CODE - A02 - A07 -A08

Next: End

FAULT CODE A07

PRESSURE GAUGE

Next: End

FAULT CODE A07

SYSTEM PRESSURE

Next: End

FAULT CODE A07

PUMP

Next: End

FAULT CODE A07

HEAT EXCHANGER (PLATE)

Next: End

FAULT CODE A07

FAULT CODE - A02 - A07 -A08

Next: End

FAULT CODE A04

PRESSURE SWITCH - WATER

Next: End

FAULT CODE A04

PRESSURE GAUGE

Next: End

FAULT CODE A04

SYSTEM PRESSURE

Next: End

FAULT CODE A04

FAULT CODE RESET - RETEST BOILER OPERATION

Next: End

FAULT CODE A02

PRESSURE GAUGE

Next: End

FAULT CODE A02

SYSTEM PRESSURE

Next: End

FAULT CODE A02 2

PUMP

Next: End

FAULT CODE A02

HEAT EXCHANGER (PLATE)

Next: End

FAULT CODE A02

THERMOSTAT - HIGH LIMIT

Next: End

FAULT CODE RED A02

PCB AKL03

Next: End

FAULT CODE A02

FAULT CODE - A02 - A07 -A08

Next: End

FUSE FURTHER INVESTIGATION - PUMP

HARNESS - WIRING - POWER (CN2)

Next: End

OBSERVATION DHW FLOW RATE

HEAT EXCHANGER (PLATE)

Next: End

OBSERVATION GAS VALVE TYPE?

PCB AKL03 - FUSE BLOWN

Next: End

FUSE FURTHER INVESTIGATION - GAS VALVE

HARNESS - WIRING - POWER (CN2)

Next: End

FAULT CODE A04 - LWPS

CABLE - LOW TENSION

Next: End

FAULT CODE A07 - FLOW THERMISTOR

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

OBSERVATION DHW FLOW RATE

ACTUATOR - DHW

Next: End

FAULT CODE A09 - FLUE THERMISTOR

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

FAULT CODE A08 - RETURN THERMISTOR

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

FUSE FURTHER INVESTIGATION - FAN

CABLE - IGNITION (CN1 AND CN3)

Next: End

FUSE FURTHER INVESTIGATION - SPARK GEN

CABLE - IGNITION (CN1 AND CN3)

Next: End

FUSE FURTHER INVESTIGATION - DIVERTER

CABLE - CONTROL - HYDRAULIC (CN4)

Next: End

FAULT CODE A02 - OVERHEAT

CABLE - COMBUSTION (CN10 CN11 FSE)

Next: End

FAULT CODE A02 - STUCK IN FAULT

PCB AKL03

Next: End

DHW HOT THEN COOL

PRESSURE GAUGE

Next: End

DHW HOT THEN COOL

SYSTEM PRESSURE

Next: End

OBSERVATION DHW FLOW RATE

GOVERNOR - FLOW

Next: End

DHW HOT THEN COOL

PCB AKL03

Next: End

DHW HOT THEN COOL

HEAT EXCHANGER (WATERWAYS)

Next: End

DHW HOT THEN COOL

HEAT EXCHANGER (PLATE)

Next: End

DHW TOO HOT

PCB AKL03

Next: End

DHW COOL RADS COOL

PRESSURE GAUGE

Next: End

DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER (WATERWAYS)

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER (PLATE)

Next: End

DHW COOL RADS COOL

PCB AKL03

Next: End

CH OPERATION

PIPE (TO EXPANSION VESSEL)

Next: End

CH OPERATION

PRESSURE GAUGE

Next: End

CH OPERATION

SYSTEM PRESSURE

Next: End

CH OPERATION 3

PCB AKL03

Next: End

CH OPERATION 2

PRESSURE GAUGE

Next: End

CH OPERATION 2

SYSTEM PRESSURE

Next: End

OBSERVATION PUMP RUNS

ACTUATOR - DHW

Next: End

OBSERVATION FAN RUNS - IGNORING DHW DEMAND

PCB AKL03

Next: End

OBSERVATION BOILER SELF CHECK

PUMP

Next: End

FAN DOES NOT RUN

PRESSURE SWITCH - WATER

Next: End

FAN DOES NOT RUN

PRESSURE GAUGE

Next: End

FAN DOES NOT RUN

SYSTEM PRESSURE

Next: End

FAN DOES NOT RUN 3

PCB AKL03

Next: End

FAN DOES NOT RUN 2

FAN

Next: End

FAULT CODE A03 - IGNORING HAL SENSOR

PCB AKL03

Next: End

BOILER ATTEMPTS TO FIRE AFTER SELF CHECK WITH PREHEAT DISABLED

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1022

FROST SYMBOL DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY

Next: p1026

RADIATOR SYMBOL DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY

Next: p1242

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p111

FAN RUNNING CONSTANTLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER SELF CHECK

Next: p1135

NO DISPLAY, NO LIGHTS

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMIANTES

Next: p1144

DISPLAY WORKS BUT LIGHTS DO NOT FLASH

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMIANTES

Next: p1146

LIGHTS OK BUT DISPLAY DOES NOT WORK

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMIANTES

Next: p1148

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p117

INLET PRESSURE DOES NOT DROP DURING SPARKING STAGE

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p122

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER AND IGNITION ELECTRODE POSITION

Next: !p1229

INLET PRESSURE DIES AWAY DURING SPARKING STAGE

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p124

ELECTRODE GAP INCORRECT / ELECTRODE WARPED OR DISTORTED

CHARACTERISTIC TEST FROM INSPECTION BURNER AND IGNITION ELECTRODE POSITION

Next: !p1231

BURNER UNSATISFACTORY

CHARACTERISTIC TEST FROM INSPECTION BURNER AND IGNITION ELECTRODE POSITION

Next: !p1234

ELECTRODE GAP INCORRECT / ELECTRODE WARPED OR DISTORTED

CHARACTERISTIC TEST FROM INSPECTION BURNER AND IGNITION ELECTRODE POSITION

Next: !p1236

BOILER GOES TO IGNITION LOCKOUT (A01) AFTER ONLY 1 ATTEMPT AT IGNITION

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1284

TEST 1 - VOLTAGE NOT AS EXPECTED

CHARACTERISTIC TEST FROM VOLTAGE FAN AT PCB DC (SPEED CONTROL) (QADAI)

Next: !p1325

TEST 2 - VOLTAGE NOT AS EXPECTED

CHARACTERISTIC TEST FROM VOLTAGE FAN AT PCB DC (SPEED CONTROL) (QADAI)

Next: !p1327

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p185

BURNER IGNITES BUT BAFFLES OUT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p218

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p296

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p298

FAULT CODE A09 OCCURS - FLUE GAS TEMPERATURE BELOW 90°C

CHARACTERISTIC TEST FROM OBSERVATION FLUE GAS TEMPERATURE

Next: !p312

FLUE TEMPERATURE EXCEEDS 90°C & BOILER STILL FIRING

CHARACTERISTIC TEST FROM OBSERVATION FLUE GAS TEMPERATURE

Next: !p314

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p325

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p327

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p358

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p360

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p388

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p390

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p444

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p446

BOILER GOES TO FAULT CODE A02 BEFORE 80 °C

CHARACTERISTIC TEST FROM OBSERVATION CH - OVERHEAT OCCUR

Next: !p470

TEMPERATURE EXCEEDS 85 °C & CONTINUES TO FIRE

CHARACTERISTIC TEST FROM OBSERVATION CH - OVERHEAT OCCUR

Next: !p472

DHW FLOW SENSOR BLOCKED OR RESTRICTED OR TURBINE STIFF / DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW SENSOR AND RESTRICTOR

Next: !p54

RESTRICTOR DAMAGED RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION DHW FLOW SENSOR AND RESTRICTOR

Next: !p57

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

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p552

DHW COOL - RADIATORS BEGIN TO HEAT OR INCREASE IN TEMPERATURE

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1075

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p556

DHW RUNS HOT THEN COOL

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p558

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p561

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p563

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1248

DIFFERENTIAL TEMPERATURE EXCESSIVELY HIGH

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p576

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p598

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p600

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1245

DIFFERENTIAL TEMPERATURE EXCESSIVELY HIGH

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p615

GAS RATE UNSATISFACTORY

Next: p629

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

Next: p631

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1251

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

CHARACTERISTIC TEST FROM CH OPERATION

Next: p716

BOILER TEMPERATURE AND SYSTEM TEMPERATURE LOW - BOILER REMAINS LIT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p718

EXCESSIVE SYSTEM PRESSURE RISE AS SYSTEM HEATS

CHARACTERISTIC TEST FROM CH OPERATION

Next: p720

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p726

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p728

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p740

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p742

PRESSURE ON GAUGE OK BUT DOES NOT CHANGE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p875

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION PRESSURE SYSTEM

Next: !p877

16/11/2022 11:11:54 2209_2_50_1 21/11/2022 09:20:37

17/11/2022 08:49:58

Next: End

OBSERVATION DIVERTER VALVE OPERATION DHW (2X LOCKING PIN)

Next: !p1078, f1079

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}

Next: p1080, !f1081

RESISTANCE ACTUATOR HARNESS

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR

Next: !p1088, !f1089

OBSERVATION DIVERTER VALVE OPERATION CH (2X LOCKING PIN)

REMOVE ACTUATOR FROM THE 3-WAY VALVE ASSEMBLY & PLACE IN A SAFE POSITION TO OBSERVE ITS OPERATION

Next: p1094, f1095

VOLTAGE DIVERTER VALVE AT PCB (CH)

{GAINPCBACS}

Next: p1096, !f1097

RESISTANCE ACTUATOR HARNESS

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR

Next: !p1112, !f1113

INFORMATION FAULTY MAIN PCB

THE TESTS CARRIED OU

Next: !p1159, !f1160

OBSERVATION DISCONNECT DHW FLOW SENSOR

RECONNECT CN9 AT THE PCB IF YOU HAVE NOT ALREADY DONE SO
DISCONNECT PLUG AT DHW FLOW SENSOR

Next: !p1165, !f1166

VOLTAGE MAINS POWER IN AFTER FUSE

{GAINPCBACS}

Next: p1171, f1172

VOLTAGE MAINS POWER IN BEFORE FUSE

{GAINPCBACS}

Next: p1173, f1174

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: !p1175, f1176

INFORMATION FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p1177, !f1178

INFORMATION FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p1185, !f1186

VOLTAGE FAN AT PCB (HV)

{GAINPCBACS}

Next: p1220, !f1221

OBSERVATION DISCONNECT FAN (NOT RUNNING)

DISCONNECT THE 4 WIRE CONNECTOR AT THE FAN AND MAKE SAFE

Next: !p1260, f1261

VOLTAGE FAN AT PCB (HV)

{GAINPCBACS}

Next: p1262, !f1263

RESISTANCE OVERHEAT STAT

REMOVE ELECTRICAL CONNECTORS FROM THE OVERHEAT STAT

Next: p1274, !f1279

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p1277, !f1278

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: !p1295, !f1296

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: !p1299, !f1300

RESISTANCE DHW THERMISTOR & HARNESS (QADAI)

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p1303, !f1304

RESISTANCE FLUE THERMISTOR

REMOVE RIGHT HAND SI

Next: !p1307, !f1308

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: !p1311, !f1312

RESISTANCE PUMP

REMOVE PUMP ELECTRICAL COVER
REMOVE ELECTRICAL CONNECTIONS FROM PUMP ASSEMBLY

Next: !p1315, !f1316

VOLTAGE FAN AT PCB (HV)

{GAINPCBACS}

Next: !p1319, !f1320

VOLTAGE FAN AT PCB DC (SPEED CONTROL) (QADAI)

{GAINPCBACS}
REMOVE CONNECTOR CN10 FROM THE PCB AND MAKE SAFE
ENSURE NO DEMANDS

Next: p1323, ?1324, ?1326

RESISTANCE FAN SPEED CONTROL AND HARNESS (QADAI)

{GAINPCBACS}
DISCONNECT CN10 AT PCB

Next: !p1332, !f1333

RESISTANCE SPARK GENERATOR

REMOVE ELECTRICAL CONNECTOR TO SPARK GENERATOR.

Next: !p1336, !f1337

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}

Next: !p1340, !f1341

RESISTANCE DIVERTER VALVE ACTUATOR

REMOVE ELECTRICAL CONNECTOR TO DIVERTER ACTUATOR

Next: !p1344, !f1345

VOLTAGE DIVERTER VALVE AT PCB (QADAI)

{GAINPCBACS}

Next: !p1348, !f1349

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p1352, !f1353

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p1356, !f1357

OBSERVATION DISCONNECT OVERHEAT STAT

DISCONNECT THE WIRES TO THE OVERHEAT THERMOSTAT AND MAKE SAFE

Next: !p1362, f1367

RESISTANCE FAN

REMOVE POWER ELECTRI

Next: !p1365, !f1366

OBSERVATION DISCONNECT LOW WATER PRESSURE SWITCH

REMOVE ELECTRICAL CONNECTORS FROM LWPS AND MAKE SAFE

Next: !p1371, !f1188

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}

Next: p1005, !f155

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p175, !f176

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p266, f267

RESISTANCE HARNESS DHW THERMISTOR

REMOVE ELECTRICAL CONNECTOR TO DHW TEMPERATURE THERMISTOR
& CONNECTOR CN9 FROM THE PCB

Next: !p268, !f538

RESET APPLIANCE - FAULT CODE A11

ENSURE NO DEMANDS ARE PRESENT

Next: p273, f274

OBSERVATION DETECTION ELECTRODE DISCONNECTED

DISCONNECT INLINE CONNECTOR FOR DETECTION ELECTRODE, BOTTOM LEFT OF COMBUSTION CHAMBER

Next: !p275, !f276

RESISTANCE FLUE THERMISTOR & HARNESS - (FAULT CODE)

REMOVE CONNECTOR CN11 FROM THE PCB
ENSURE BOILER IS COOL

Next: p287, f288

RESISTANCE FLUE THERMISTOR

REMOVE RIGHT HAND SI

Next: !p541, !f290

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p301, !f302

RESISTANCE RETURN TEMPERATURE SENSOR & HARNESS - (FAULT CODE)

REMOVE CONNECTOR CN11 FROM THE PCB
ENSURE BOILER IS COOL

Next: p316, f317

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: !p542, !f319

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p330, !f331

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER (FAULT CODE)

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p340, !f341

RESISTANCE FLOW TEMPERATURE SENSOR & HARNESS - (FAULT CODE)

REMOVE CONNECTOR CN11 FROM THE PCB
ENSURE BOILER IS COOL

Next: p349, f350

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: !p539, !f352

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p363, !f364

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER (FAULT CODE)

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p373, !f374

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p382, f383

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE ELECTRICAL CONNECTORS FROM LWPS

Next: !p537, f385

OBSERVATION PRESSURE SYSTEM

Next: !p386, ?387, ?389

RESET APPLIANCE

ENSURE NO DEMANDS ARE PRESENT
ENSURE BOILER IS COOL

Next: p435, f436

RESISTANCE OVERHEAT STAT & HARNESS

DISCONNECT CN11 FROM THE PCB

Next: !p547, f438

RESISTANCE OVERHEAT STAT

REMOVE ELECTRICAL CONNECTORS FROM THE OVERHEAT STAT

Next: !p546, !f440

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p449, !f450

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER (FAULT CODE)

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p463, !f464

OBSERVATION DHW ISOLATION VALVE

Next: p48, !f50

OBSERVATION FAN RUNS DHW DEMAND

Next: p476, f1259

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR CN2 FROM THE PCB

Next: p515, f516

RESISTANCE PUMP

REMOVE PUMP ELECTRICAL COVER
REMOVE ELECTRICAL CONNECTIONS FROM PUMP ASSEMBLY

Next: !p517, !f518

RESISTANCE FAN

REMOVE POWER ELECTRI

Next: !p543, !f522

RESISTANCE SPARK GENERATOR

REMOVE ELECTRICAL CONNECTOR TO SPARK GENERATOR.

Next: !p544, !f526

RESISTANCE DIVERTER VALVE ACTUATOR

REMOVE ELECTRICAL CONNECTOR TO DIVERTER ACTUATOR

Next: !p545, !f530

RESISTANCE GAS VALVE

DISCONNECT PLUG FROM GAS VALVE

Next: !p533, !f534

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p572, ?573, ?575

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p611, ?612, ?614

OBSERVATION DHW SYMBOL DISPLAYED

Next: p1191, f810

VOLTAGE DHW FLOW SENSOR TO PCB

{GAINPCBACS}

Next: !p818, f811

VOLTAGE PCB TO DHW FLOW SENSOR

{GAINPCBACS}

Next: p812, !f813

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p829, !f830

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p869, f870

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE ELECTRICAL CONNECTORS FROM LWPS

Next: !p1004, f872

OBSERVATION PRESSURE SYSTEM

Next: !p873, ?874, ?876

RESISTANCE HARNESS SPARK GENERATOR

REMOVE CN1 FROM THE PCB

Next: !p1006, !f1007

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN & BURNER ASSEMBLY

Next: p1009, !f1010

INSPECTION BURNER

REMOVE FAN & BURNER ASSEMBLY

Next: !p1011, !f1012

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN & BURNER ASSEMBLY

Next: p1014, !f1015

INSPECTION BURNER

REMOVE FAN & BURNER ASSEMBLY

Next: p1018, !f1017

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p1019, !f1020

OBSERVATION DISPLAY

ENSURE NO DEMANDS PRESENT

Next: p1053, ?1025, ?1027

TEMPERATURE AMBIENT

Next: p1066, !f1065

OBSERVATION ISOLATE DHW

TURN DHW ISOLATION VALVE TO "OFF" POSITION UNDERNEATH THE BOILER

Next: !p1056, !f1057

RESISTANCE SENSOR FLOW

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p1067, !f1068

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p1069, !f1070

OBSERVATION DIVERTER VALVE TYPE

Next: p1076, f1077

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}

Next: p1084, !f1085

RESISTANCE ACTUATOR HARNESS

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR

Next: !p1082, !f1083

OBSERVATION DIVERTER VALVE OPERATION DHW (1X LOCKING PIN)

Next: !p1086, f1087

OBSERVATION DIVERTER VALVE TYPE

Next: p1092, f1093

VOLTAGE DIVERTER VALVE AT PCB (CH)

{GAINPCBACS}

Next: p1106, !f1107

INSPECTION DIVERTER VALVE SPINDLE (2X LOCKING PIN)

Next: p1100, !f1101

RESISTANCE ACTUATOR HARNESS

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE (DV) ACTUATOR

Next: !p1098, !f1099

PUMP LIMPET TEST

Next: p1102, !f1103

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p1104, !f1105

PUMP LIMPET TEST

Next: p1108, !f1109

OBSERVATION DIVERTER VALVE OPERATION CH (1X LOCKING PIN)

Next: p1110, f1111

FAULT CODES

Next: p1224, !f113

INSPECTION DIVERTER VALVE SPINDLE (1X LOCKING PIN)

ACTUATOR REMOVED AND PRIMARY WATER DRAINED FROM PREVIOUS TEST

Next: p1114, !f1115

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p1116, !f1117

RESISTANCE HARNESS FAN (LV)

REMOVE SIGNAL CONTRO

Next: p1136, !f1137

VOLTAGE FAN AT PCB DC (PERMANENT)

{GAINPCBACS}
REMOVE CONNECTOR CN10 FROM THE PCB AND MAKE SAFE

Next: p1138, !f1139

VOLTAGE FAN AT PCB DC (SPEED CONTROL) - NO DEMAND

{GAINPCBACS}
REMOVE CONNECTOR CN10 FROM THE PCB AND MAKE SAFE

Next: !p1140, !f1141

OBSERVATION IS FAN RUNNING CONSTANTLY

REMOVE COMBUSTION COVER

Next: p1169, f1170

OBSERVATION DISCONNECT CN9

{GAINPCBACS}

Next: p1163, f1164

VOLTAGE MAIN PCB TO DISPLAY PCB

{GAINPCBACS}
MEASURE THE VOLTAGE BETWEEN

Next: p1157, f1158

INSPECTION HARNESS MAIN PCB TO DISPLAY PCB

Next: !p1161, !f1162

INFORMATION FAULTY LED

AS THE DISPLAY IS IL

Next: !p1167, !f1168

OBSERVATION DISCONNECT FAN

DISCONNECT THE 4 WIRE CONNECTOR AT THE FAN AND MAKE SAFE

Next: !p1280, f1358

INSPECTION CONDENSATE

Next: p119, !f118

VOLTAGE MAINS POWER IN AT PCB

{GAINPCBACS}

Next: p1181, !f1182

INFORMATION FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p1179, !f1180

RESISTANCE FUSE PCB

REMOVE FUSE F1 FROM THE PCB

Next: !p1183, f1184

PRESSURE GAS INLET AND DROP

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p120, ?121, ?123

OBSERVATION DISCONNECT FAN (NOT RUNNING)

DISCONNECT THE 4 WIRE CONNECTOR AT THE FAN AND MAKE SAFE

Next: p866, f1219

OBSERVATION SPARKING OCCURS

REMOVE ELECTRODE LEA

Next: p152, f153

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p162, f1268

RESISTANCE HARNESS FAN (HV)

REMOVE MAINS VOLTAGE CONNECTOR FROM FAN ASSEMBLY

Next: !p1222, !f1223

FAULT CODE HISTORY

Next: !p1225, !f1226

DISCONNECT EXTERNAL CONTROLS - SELF CHECK

{GAINPCBACS}
DISCONNECT EXTERNAL CONTROLS FROM CONNECTOR CN5 & MAKE SAFE

Next: !p1243, !f1244

DISCONNECT EXTERNAL CONTROLS - CH OPERATION

{GAINPCBACS}
DISC

Next: !p1246, !f1247

DISCONNECT EXTERNAL CONTROLS - CH OPERATION

{GAINPCBACS}
DISC

Next: !p1249, !f1250

DISCONNECT EXTERNAL CONTROLS - CH OPERATION

{GAINPCBACS}
DISC

Next: !p1252, !f1253

RESISTANCE HARNESS FAN (HV)

REMOVE MAINS VOLTAGE CONNECTOR FROM FAN ASSEMBLY

Next: !p1264, !f1265

RESISTANCE GAS VALVE AND HARNESS

REMOVE CN2 FROM THE PCB

Next: !p1275, f1276

RESISTANCE LOW WATER PRESSURE SWITCH

REMOVE ELECTRICAL CONNECTORS FROM LWPS

Next: p1285, !f1286

RESISTANCE OVERHEAT STAT

REMOVE ELECTRICAL CONNECTORS FROM THE OVERHEAT STAT

Next: !p1287, !f1288

INSPECTION COMPENSATION TUBE

Next: p133, !f134

RESISTANCE HARNESS FAN (LV)

REMOVE SIGNAL CONTRO

Next: !p1328, !f1329

INSPECTION AIR INTAKE

Next: p135, !f136

INSPECTION FLUE

Next: !p137, !f138

INSPECTION COMPENSATION TUBE

Next: p158, !f159

INSPECTION AIR INTAKE

Next: p192, !f161

INSPECTION IGNITION ELECTRODE AND LEAD

DISCONNECT AND REMOVE IGNITION LEAD FROM HEAT EXCHANGER / SPARK GENERATOR

Next: p179, !f178

RESISTANCE GAS VALVE AND HARNESS

REMOVE CN2 FROM THE PCB

Next: p132, f174

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN & BURNER ASSEMBLY

Next: p180, !f181

INSPECTION BURNER AND IGNITION ELECTRODE POSITION

REMOVE FAN & BURNER ASSEMBLY
REFIT IGNITION ELECTRODE IF YOU HAVE NOT ALREADY DONE SO

Next: !p182, ?1228, ?1230

INSPECTION CONDENSATE

Next: p187, !f186

INSPECTION COMPENSATION TUBE

Next: p188, !f189

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p190, !f191

INSPECTION AIR INTAKE

Next: p202, !f201

INSPECTION FLUE

Next: p160, !f200

INSPECTION FLUE

Next: p206, !f203

INSPECTION RECTIFICATION ELECTRODE

DISCONNECT AND REMOVE RECTIFICATION LEAD FROM HEAT EXCHANGER

Next: p211, !f210

RESISTANCE HARNESS RECTIFICATION ELECTRODE

DISCONNECT FLAME SENSE LEAD FROM PCB AND INLINE CONNECTOR

Next: p204, !f209

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN & BURNER ASSEMBLY

Next: p212, !f213

INSPECTION BURNER AND RECTIFICATION ELECTRODE POSITION

REMOVE FAN & BURNER ASSEMBLY
REFIT RECTIFICATION ELECTRODE IF YOU HAVE NOT ALREADY DONE SO

Next: !p214, ?1233, ?1235

INSPECTION CONDENSATE

Next: p219, !f220

INSPECTION COMPENSATION TUBE

Next: p221, !f222

PRESSURE GAS INLET

ATTACH U-GAUGE TO GAS INLET PRESSURE TEST POINT

Next: p223, !f224

INSPECTION AIR INTAKE

Next: p225, !f226

INSPECTION FLUE

Next: p237, !f228

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE FAN & BURNER ASSEMBLY

Next: p238, !f239

INSPECTION BURNER

REMOVE FAN & BURNER ASSEMBLY

Next: !p1071, !f241

RESET APPLIANCE - FAULT CODE (SENSORS)

ENSURE NO DEMANDS ARE PRESENT

Next: !p270, !f271

INSPECTION CONDENSATE

Next: p277, !f278

INSPECTION FLUE

Next: p279, !f280

INSTALLATION TIGHTNESS TEST

Next: p281, !f282

INSPECTION RECTIFICATION ELECTRODE

DISCONNECT AND REMOVE RECTIFICATION LEAD FROM HEAT EXCHANGER

Next: !p283, !f284

RESET APPLIANCE - FAULT CODE (SENSORS)

ENSURE NO DEMANDS ARE PRESENT

Next: p291, !f292

OBSERVATION PRESSURE SYSTEM

Next: p293, ?295, ?297

OBSERVATION PUMP RUNS

Next: p299, f300

PUMP LIMPET TEST

Next: p305, !f306

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE PCB

Next: !p303, !f304

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p307, !f308

OBSERVATION FLUE GAS TEMPERATURE

INSERT TEMPERATURE PROBE INTO FLUE GAS TEST POINT

Next: !p309, ?311, ?313

RESET APPLIANCE - FAULT CODE (SENSORS)

ENSURE NO DEMANDS ARE PRESENT

Next: p320, !f321

OBSERVATION PRESSURE SYSTEM

Next: p322, ?324, ?326

OBSERVATION PUMP RUNS

Next: p328, f329

PUMP LIMPET TEST

Next: p334, !f335

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE PCB

Next: !p332, !f333

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p336, !f337

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p338, f339

OBSERVATION CH - FAULT CODE A08 OCCURS

Next: p344, !f345

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p342, !f343

OBSERVATION PUMP OVERRUN

Next: !p346, !f347

RESET APPLIANCE - FAULT CODE (SENSORS)

ENSURE NO DEMANDS ARE PRESENT

Next: p353, !f354

OBSERVATION PRESSURE SYSTEM

Next: p355, ?357, ?359

OBSERVATION PUMP RUNS

Next: p361, f362

PUMP LIMPET TEST

Next: p367, !f368

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE PCB

Next: !p365, !f366

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: p369, !f370

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p371, f372

OBSERVATION CH - FAULT CODE A07 OCCURS

Next: p377, !f378

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p375, !f376

OBSERVATION PUMP OVERRUN

Next: !p379, !f380

RESET APPLIANCE - FAULT CODE A04

ENSURE NO DEMANDS ARE PRESENT

Next: !p391, !f392

OBSERVATION PRESSURE SYSTEM

Next: p441, ?443, ?445

OBSERVATION PUMP RUNS

Next: p447, f448

PUMP LIMPET TEST

Next: p453, !f454

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE PCB

Next: !p451, !f452

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p455, !f456

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: p457, !f458

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p459, !f460

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p461, f462

OBSERVATION CH - OVERHEAT OCCUR

ATTACH TEMPERATURE P

Next: p467, ?469, ?471

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p465, !f466

OBSERVATION PUMP OVERRUN

Next: !p473, !f474

RESISTANCE HARNESS FAN (LV)

REMOVE SIGNAL CONTRO

Next: p979, !f508

OBSERVATION COLD WATER FLOW RATE

Next: p49, !f51

INSPECTION DHW FLOW SENSOR AND RESTRICTOR

DRAIN THE DOMESTIC H

Next: !p52, ?53, ?55

RESISTANCE FAN AND HARNESS

REMOVE CONNECTOR CN3 FROM THE PCB

Next: p519, f520

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE CONNECTOR CN1 FROM THE PCB

Next: p523, f524

RESISTANCE DIVERTER VALVE ACTUATOR & HARNESS

REMOVE CONNECTOR CN4 FROM THE PCB

Next: p527, f528

RESISTANCE GAS VALVE AND HARNESS

REMOVE CN2 FROM THE PCB

Next: !p531, f532

OBSERVATION PRESSURE SYSTEM

Next: p595, ?597, ?599

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p587, !f588

OBSERVATION PRESSURE SYSTEM

Next: p559, ?560, ?562

PUMP LIMPET TEST

Next: p564, !f565

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p566, !f567

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p568, !f569

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: !p570, f571

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p585, !f586

OBSERVATION DHW OUTPUT (MIXER TAP PASSING)

Next: p601, !f602

PUMP LIMPET TEST

Next: p603, !f604

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: p605, !f606

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p607, !f608

TEMPERATURE DIFFERENTIAL PLATE HEAT EXCHANGER

ATTACH TEMPERATURE PROBES TO FLOW & RETURN PIPES AT THE BOTTOM LEFT OF THE COMBUSTION CHAMBER

Next: p609, f610

GAS RATE

Next: p626, ?628, ?630

INSPECTION NON-RETURN VALVE

ENSURE BOILER IS COO

Next: !p624, !f625

INSPECTION BY-PASS VALVE

ENSURE BOILER IS COO

Next: !p654, !f655

INSPECTION FLUE

Next: p644, !f645

INSPECTION FLUE

Next: p632, !f633

INSPECTION AIR INTAKE

Next: p1013, !f635

INSPECTION AIR INTAKE

Next: p1008, !f647

OBSERVATION SERVICE VALVE FLOW & RETURN

Next: p735, !f736

OBSERVATION PRESSURE SYSTEM

Next: p723, ?725, ?727

INSPECTION EXPANSION VESSEL PRESSURE

DRAIN BOILER PRIMARY SYSTEM WATER

Next: !p721, !f722

PUMP LIMPET TEST

Next: p729, !f730

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p731, !f732

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: !p733, !f734

OBSERVATION PRESSURE SYSTEM

Next: p1091, ?739, ?741

RESISTANCE HARNESS DHW FLOW TURBINE

REMOVE THE CONNECTOR FROM THE FLOW TURBINE

Next: !p814, !f815

RESISTANCE HARNESS PUMP

REMOVE CONNECTOR CN2 FROM THE PCB

Next: !p831, !f832

VOLTAGE FAN AT PCB DC (SPEED CONTROL)

{GAINPCBACS}
REMOVE CONNECTOR CN10 FROM THE PCB AND MAKE SAFE
ENSURE NO DEMANDS

Next: p867, f868

RESISTANCE HARNESS FAN (LV)

REMOVE SIGNAL CONTRO

Next: !p884, !f885

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTORS FROM FLOW SENSOR

Next: p878, !f879

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTORS FROM RETURN SENSOR

Next: p880, !f881

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p882, !f883

VOLTAGE FAN AT PCB DC (HALL SENSOR)

{GAINPCBACS}

Next: !p980, !f981

System Information

Total Tests: 671

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control