XSol Diagnostic System

Interactive Test Sequence Navigator

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:

IDEAL I35 AND VARIANTS

BOILERS COVERED BY T

Next: &1, *

NO FAULT FOUND

Next: nff

CASE REMOVAL

Next: &50, !f2

TYPE OF DIAGNOSTIC PROCEDURE

Next: &5, !f4

OPERATIONAL SEQUENCE

NO LONGER USED

Next: &67, !f341

SELF TEST

SELECTOR SWITCH SET TO OFF

Next: &3, ?51, ?53, ?69, ?83, ?742, ?753

DHW FLOW RATE

Next: &1456, f334

PRE- HEAT OPERATION

PRE-HEAT ENABLED (PR

Next: &1430, ?588, ?590

CH OPERATION

SELECTOR SWITCH SET TO DHW/CH
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: &453, ?485, ?487, ?501, ?557

DHW OPERATION

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: &343, ?345, ?347, ?349, ?351, ?353

OBSERVATION SYSTEM PRESSURE

SELECTOR SWITCH SET TO DHW/CH
CH TEMPERATURE CONTROL SET TO MAX

Next: &342, f544

FAN RUNS DHW DEMAND

SELECTOR SWITCH SET TO DHW DEMAND
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: &788, f802

PUMP RUNS DHW DEMAND

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: &1181, f789

DHW DEMAND RECOGNISED

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: &772, f795

FAULT CODE F7

NOT USED

Next: &nff, f893

FAULT CODE F9

NOT USED

Next: &nff, !f1291

FAULT CODE L5

NOT USED

Next: &nff, f901

FAULT CODE L6

NOT USED

Next: &nff, f1084

FAULT CODE C0 - C2

NOT USED

Next: &nff, f1292

FAULT CODE F1

NOT USED

Next: &nff, f919

FAULT CODE L1

NOT USED

Next: &nff, f936

FAULT CODE F4

NOT USED

Next: &nff, f1161

FAULT CODE F5

NOT USED

Next: &nff, f1166

FAULT CODE FA

NOT USED

Next: &nff, f1124

FURTHER INVESTIGATION FUSE BLOWN

NOT USED

Next: &nff, f1134

BURNER IGNITES AND ESTABLISHES

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: &344, ?1182, ?1184, ?1186

DIVERTER VALVE ACTUATOR REFITTING PROCEDURE

1. ENSURE TH

Next: &nff, f1427

OBSERVATION FAN AND PUMP OVERRUN

SELECTOR SWITCH SET

Next: &nff, !f1431

BOILER FIRES WITH NO DEMAND

SELECTOR SWITCH SET

Next: &794, f1457

NEW QADAI OPTIONS

OUTSIDE MODEL

Next: &nff, ?1686, ?1688, ?1690, ?1692, ?1694, ?1696, ?1698, ?1700, ?1702, ?1704, ?1706, ?1708, ?1710, ?1712, ?1714, ?1716, ?1718, ?1771, ?1955

CODE L1

SYSTEM PRESSURE

Next: End

CODE L1

ISOLATION VALVE FLOW AND RETURN

Next: End

CODE L1

PLATE HEAT EXCHANGER

Next: End

FLOW TEMP EXCESSIVE

THERMISTOR - NO FLOW

Next: End

FLOW TEMP EXCESSIVE

THERMISTOR RETURN

Next: End

FLOW TEMP EXCESSIVE 2

THERMISTOR - NO FLOW

Next: End

FLOW TEMP EXCESSIVE 2

THERMISTOR RETURN

Next: End

RECTIFICATION LEAD L6

HARNESS MAINS VOLTAGE

Next: End

BURNER DOES NOT ESTABLISH L6

ELECTRODE - DETECTION

Next: End

CODE FA

PUMP HEAD

Next: End

CODE FA

THERMISTOR RETURN

Next: End

CODE FA

THERMISTOR - NO FLOW

Next: End

FAN FURTHER INVESTIGATION FUSE

FAN

Next: End

FURTHER INVESTIGATION FUSE

GAS VALVE

Next: End

FURTHER INVESTIGATION FUSE

UNIT - IGNITOR

Next: End

CODE F4

THERMISTOR - NO FLOW

Next: End

CODE F5

THERMISTOR RETURN

Next: End

FAN DOES NOT RUN DHW DEMAND

THERMISTOR - NO FLOW

Next: End

FAN DOES NOT RUN DHW DEMAND

THERMISTOR RETURN

Next: End

BURNER DOES NOT IGNITE 3

CONDENSATE EXTERNAL PIPE

Next: End

BURNER DID NOT IGNITE 3

KIT - REPLACEMENT - SUMP & COVER

Next: End

BURNER DOES NOT ESTABLISH

PRESSURE GAS INLET

Next: End

DETECTION VOLTAGE

PCB

Next: End

RECTIFICATION LEAD

HARNESS MAINS VOLTAGE

Next: End

BURNER DOES NOT IGNITE 2

CONDENSATE EXTERNAL PIPE

Next: End

BURNER DID NOT IGNITE 2

KIT - REPLACEMENT - SUMP & COVER

Next: End

BURNER BAFFLES OR NOISEY

PRESSURE GAS INLET

Next: End

BURNER BAFFLES OR NOISEY

FLUE

Next: End

BURNER BAFFLES OR NOISY

INJECTOR

Next: End

BURNER BAFFLES OR NOISEY

BURNER

Next: End

BURNER BAFFLES OR NOISEY

HEAT EXCHANGER - PRIMARY (HEAT ENGINE)

Next: End

BURNER DOES NOT IGNITE

CONDENSATE EXTERNAL PIPE

Next: End

BURNER DID NOT IGNITE

KIT - REPLACEMENT - SUMP & COVER

Next: End

FAN RUNS NO IGNITION

THERMISTOR - NO FLOW

Next: End

HT HARNESS - EARTH

HT HARNESS - EARTH

Next: End

NO SPARK OUTPUT

HARNESS MAINS VOLTAGE

Next: End

BURNER DOES NOT IGNITE

GAS VALVE

Next: End

BURNER DOES NOT IGNITE

INJECTOR

Next: End

BURNER DOES NOT IGNITE

BURNER

Next: End

BURNER DOES NOT IGNITE

HEAT EXCHANGER - PRIMARY (HEAT ENGINE)

Next: End

BURNER DOES NOT IGNITE 2

FLUE

Next: End

BURNER DOES NOT IGNITE - 2

INJECTOR

Next: End

BURNER DOES NOT IGNITE - 2

BURNER

Next: End

BURNER DOES NOT IGNITE

ELECTRODE - IGNITION

Next: End

BURNER DOES NOT IGNITE - 2

HEAT EXCHANGER - PRIMARY (HEAT ENGINE)

Next: End

DIVERTER FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

BOILER UP TO TEMP RADS COOL

KIT - CARTRIDGE - BYPASS

Next: End

CODE F9

PCB

Next: End

FAULT CODE CO OR C2

BCC

Next: End

DHW COOL SYSTEM COOL

PUMP HEAD

Next: End

DHW COOL SYS COOL

THERMISTOR - NO FLOW

Next: End

DHW COOL SYS COOL

THERMISTOR RETURN

Next: End

SEND EXT CONTROLS134

HARNESS MAINS VOLTAGE

Next: End

CH DEMAND DOES NOT REACT134

TIMER

Next: End

DHW COOL SYS COOL

CUI BOARD

Next: End

F DISPLAYED

FROST PROTECTION NORMAL OPERATION

Next: End

F DISPLAYED

THERMISTOR - NO FLOW

Next: End

F DISPLAYED

THERMISTOR RETURN

Next: End

DIVERTER VALVE REFIITING

Z DIRECTION

Next: End

FAN AND PUMP OVERRUN

PCB

Next: End

DHW FLOW

COLD WATER SUPPLY POOR

Next: End

F DISPLAYED2

FROST PROTECTION NORMAL OPERATION

Next: End

F DISPLAYED2

THERMISTOR - NO FLOW

Next: End

F DISPLAYED2

THERMISTOR RETURN

Next: End

BOILER FIRES NO DEMAND

PCB

Next: End

ON WITH NO DEMAND

FROST STAT

Next: End

FIRES NO DEMAND

KIT - FLOW SENSOR C/W TURBINE

Next: End

BOILER FIRES NO DEMAND

Next: End

BOILER FIRES NO DEMAND 2

Next: End

BURNER DOES NOT ESTABLISH

ELECTRODE - DETECTION

Next: End

ELECTRODE POSITION

ELECTRODE - DETECTION

Next: End

DHW COOL

PRESSURE GAS INLET

Next: End

NO 5VDC TO DISPLAY

PCB

Next: End

PCB DAMAGED

PRIMARY PCB AND LEAK OR SHORT

Next: End

BURNER DOES NOT IGNITE

GAS VALVE AND PCB

Next: End

NO FAN DHW DEMAND

KNOB - SELECTOR

Next: End

DHW COOL RADS COOL

KNOB - SELECTOR

Next: End

DOES NOT REACT TO CH DEMAND

KNOB - SELECTOR

Next: End

BOILER AND SYSTEM COOL

KNOB - SELECTOR

Next: End

L1 FAULT CODE

BCC

Next: End

CODE L6

GAS VALVE

Next: End

L6 FAULT CODE

PCB

Next: End

NO VOLTAGE TO DIVERTER (QADAI)

PCB

Next: End

INCORRECT RESISTANCE (QADAI)

MOTOR DIVERTER VALVE

Next: End

NO VOLTAGE TO SPARK GEN (QADAI)

PCB

Next: End

INCORRECT RESISTANCE (QADAI)

UNIT - IGNITOR

Next: End

NO FAN AT START UP QADAI

PCB

Next: End

INCORRECT RESISTANCE (QADAI)

FAN

Next: End

NO POWER TO PUMP (QADAI)

PCB

Next: End

INCORRECT RESISTANCE (QADAI)

PUMP HEAD

Next: End

NO POWER TO GAS VALVE (QADAI)

PCB

Next: End

QADAI

THERMISTOR RETURN

Next: End

OUT OF RANGE (QADAI)

THERMISTOR - NO FLOW

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION

Next: End

BLANK FOR DIAGNOSTICS LITE 2

Z DIRECTION

Next: End

NO MAINS TO FAN AT START UP QADAI

PCB

Next: End

5 VDC DHW TURBINE (QADAI)

PCB

Next: End

NO FAN DHW DEMAND (QADAI)

HARNESS LOW VOLTAGE

Next: End

NO VOLTAGE TO DIVERTER DHW (QADAI)

PCB

Next: End

FAULT CODE L1 ERP

HARNESS MAINS VOLTAGE

Next: End

PUMP FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

DIVERTER FURTHER INVESTIGATION FUSE ERP PUMPNEW GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE ERP PUMPNEW GAS VALVE

UNIT - IGNITOR

Next: End

FAN FURTHER INVESTIGATION FUSE ERP PUMP

FAN

Next: End

FURTHER INVESTIGATION FUSE ERP PUMP

GAS VALVE

Next: End

FURTHER INVESTIGATION FUSE ERP PUMP

UNIT - IGNITOR

Next: End

BURNER DOES NOT IGNITE NEW GAS VALVE

INJECTOR

Next: End

BURNER DOES NOT IGNITE NEW GAS VALVE

BURNER

Next: End

BURNER DOES NOT IGNITE NEW GAS VALVE

HEAT EXCHANGER - PRIMARY (HEAT ENGINE)

Next: End

BURNER DOES NOT IGNITE 2 NEW GAS VALVE

FLUE

Next: End

BURNER DOES NOT IGNITE NEW GAS VALVE

HARNESS MAINS VOLTAGE & PCB

Next: End

BURNER DOES NOT IGNITE - NEW GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

RESISTANCE WRONG (QADAI)

GAS VALVE

Next: End

RESISTANCE WRONG NEW STYLE (QADAI)

GAS VALVE

Next: End

INCORRECT RESISTANCE ERP (QADAI)

PUMP HEAD

Next: End

DIVERTER FURTHER INVESTIGATION FUSENEW GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSENEW GAS VALVE

UNIT - IGNITOR

Next: End

GAS VALVE FURTHER INVESTIGATION FUSENEW GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

FUSE INVESTIGATION

HARNESS MAINS VOLTAGE - ERP PUMP HARNESS

Next: End

PUMP RUNS DHW DEMAND

HARNESS MAINS VOLTAGE - ERP PUMP HARNESS

Next: End

POWER UP

HARNESS MAINS VOLTAGE - ERP PUMP HARNESS

Next: End

GAS VALVE FURTHER INVESTIGATION FUSE ERP PUMPNEW GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

DIVERTER FURTHER INVESTIGATION FUSE ERP PUMP

HARNESS MAINS VOLTAGE

Next: End

CASE REMOVAL

DIRECTION CHOICE OR CONTINUE

Next: End

DHW FLOW RATE

PACK - DHW

Next: End

DHW FLOW RATE

REGULATOR - FLOW

Next: End

OPERATIONAL SEQUENCE

DIRECTION CHOICE OR CONTINUE

Next: End

DHW NOISEY KETTLING

PUMP HEAD

Next: End

FOR TYPE DIAG PROCEDURE

DIRECTION CHOICE OR CONTINUE

Next: End

DHW NOISEY KETTLING

THERMISTOR - NO FLOW

Next: End

DHW NOISEY KETTLING

THERMISTOR RETURN

Next: End

SEND EXT CONTROLS

HARNESS MAINS VOLTAGE

Next: End

CH DEMAND DOES NOT REACT

TIMER

Next: End

SEND EXT CONTROLS1

HARNESS MAINS VOLTAGE

Next: End

CH DEMAND DOES NOT REACT1

TIMER

Next: End

CH BOILER UP TO TEMP

PCB

Next: End

CH BOILER UP TO TEMP

HARNESS MAINS VOLTAGE

Next: End

BOILER UP TO TEMP RADS COOL

KIT - BODY - DIVERTER VALVE C/W PADDLE

Next: End

BOILER UP TO TEMP RADS COOL

ISOLATION VALVE FLOW AND RETURN

Next: End

SYSTEM PRESSURE

EXPANSION VESSEL

Next: End

BOILER AND SYS COOL

THERMISTOR - NO FLOW

Next: End

BOLIER AND SYS COOL

THERMISTOR RETURN

Next: End

BOILER AND SYS COOL

CUI BOARD

Next: End

CH BOILER NOISEY

PUMP HEAD

Next: End

CH NOISEY

THERMISTOR - NO FLOW

Next: End

CH NOISEY

THERMISTOR RETURN

Next: End

PREHEAT FUNCTION

CUI BOARD

Next: End

PREHEAT FUNCTION

THERMISTOR - NO FLOW

Next: End

PREHEAT FUNCTION

THERMISTOR RETURN

Next: End

ERROR CODE

DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION FUSED SPUR

Z DIRECTION

Next: End

FURTHER INVETIGATION FUSE F1

Z DIRECTION

Next: End

NO DISPLAY

HARNESS DISPLAY-CONTROL

Next: End

FAN DOES RUN START UP

PCB

Next: End

FAN DOES NOT RUN START UP

HARNESS MAINS VOLTAGE

Next: End

PUMP ONLY RUNS FOR 5 SECS

SYSTEM PRESSURE

Next: End

PUMP RUNS FOR 5 SECS

SWITCH - PRESSURE - WATER

Next: End

FAN CONTROL VOLTAGE

PCB

Next: End

FAN DOES NOT RUN STARTUP

HARNESS LOW VOLTAGE

Next: End

NO PUMP AT START UP2

PCB

Next: End

NO PUMP AT STATR UP2

HARNESS MAINS VOLTAGE

Next: End

5 VDC DHW TURBINE

PCB

Next: End

NO FAN DHW DEMAND

HARNESS LOW VOLTAGE

Next: End

FAN DOES NOT RUN DHW DEMAND

CUI BOARD

Next: End

DHW TOO HOT

THERMISTOR - NO FLOW

Next: End

DHW TOO HOT

THERMISTOR RETURN

Next: End

DHW TOO HOT

CUI BOARD

Next: End

DHW COOL RADS HOT - 2

KIT - BODY - DIVERTER VALVE C/W PADDLE

Next: End

DHW COOL RADS HOT

HARNESS MAINS VOLTAGE

Next: End

DHW COOL RADS HOT

KIT - BODY - DIVERTER VALVE C/W PADDLE

Next: End

SEND EXT CONTROLS13

HARNESS MAINS VOLTAGE

Next: End

CH DEMAND DOES NOT REACT13

TIMER

Next: End

CH BOILER TO TEMP RADS COOL

PUMP HEAD

Next: End

NO PUMP AT START UP

PCB

Next: End

CH BOILER UP TO TEMP RADS COOL

Next: End

CODE F7

Next: End

NO PUMP AT STATR UP

HARNESS MAINS VOLTAGE

Next: End

CODE L5

DIRECTION CHOICE OR CONTINUE

Next: End

PUMP ONLY RUNS FOR 5 SECS F1

SYSTEM PRESSURE

Next: End

PUMP RUNS FOR 5 SECS F1

SWITCH - PRESSURE - WATER

Next: End

CODE L1

THERMISTOR - NO FLOW

Next: End

CODE L1

THERMISTOR RETURN

Next: End

CODE LI

PUMP HEAD

Next: End

NO PUMP AT START UP2 L1

PCB

Next: End

NO PUMP AT STATR UP2 L1

HARNESS MAINS VOLTAGE

Next: End

DHW HOT THEN COLD

PUMP HEAD

Next: End

DHW HOT THEN COLD

PLATE HEAT EXCHANGER

Next: End

DHW HOT THEN COLD

THERMISTOR - NO FLOW

Next: End

DHW HOT THEN COLD

THERMISTOR RETURN

Next: End

FLOW TEMP EXCESSIVE

PCB

Next: End

FLOW TEMP EXCESSIVE 2

PCB

Next: End

START- UP

PUMP HEAD

Next: End

BURNER DOES NOT ESTABLISH L6

HARNESS - DETECTION LEAD

Next: End

CODE FA

PCB

Next: End

FAN FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

GAS VALVE FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE

FUSE- PCB

Next: End

SPARK GEN FURTHER INVESTIGATION FUSE

HARNESS MAINS VOLTAGE

Next: End

CODE F4

PCB

Next: End

CODE F4

HARNESS LOW VOLTAGE

Next: End

CODE F5

PCB

Next: End

CODE F5

HARNESS LOW VOLTAGE

Next: End

BLOCKAGE

PRIMARY HEAT EXCHANGER - CODE L1

Next: End

FAN DOES NOT RUN DHW

HARNESS LOW VOLTAGE

Next: End

FAN DOES NOT RUN DHW 2

HARNESS LOW VOLTAGE

Next: End

BURNER DOES NOT IGNITE ESTABLISH 3

KIT - SIPHON TRAP

Next: End

DETECTION VOLTAGE CORRECT

PCB

Next: End

BURNER DOES NOT ESTABLISH

HARNESS - DETECTION LEAD

Next: End

BURNER DOES NOT IGNITE ESTABLISH 2

KIT - SIPHON TRAP

Next: End

BURNER BAFFLES OR NOISEY

GAS VALVE

Next: End

BURNER DOES NOT IGNITE ESTABLISH

KIT - SIPHON TRAP

Next: End

VOLTAGE TO SPARK GENERATOR

PCB

Next: End

NO SPARK OUTPUT

UNIT - IGNITOR

Next: End

POOR SUPPLY

PRESSURE GAS INLET

Next: End

GAS VALVE MECHANICAL

GAS VALVE

Next: End

BURNER DOES NOT IGNITE 2

GAS VALVE

Next: End

FURTHER INVESTIGATION FUSE

MOTOR DIVERTER VALVE

Next: End

BOILER UP TO TEMP RADS COOL

Next: End

CH NOISEY

HEAT EXCHANGER - PRIMARY (HEAT ENGINE)

Next: End

DHW NOISY - DHW AND CH

HEAT EXCHANGER - PRIMARY (HEAT ENGINE)

Next: End

DHW COOL RADS COOL

PLATE HEAT EXCHANGER

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER - PRIMARY (HEAT ENGINE)

Next: End

CH DEMAND - DOES NOT REACT134

Next: End

CH DEMAND - SEND VOLTAGE134

PCB

Next: End

CH DEMANED - RETURN VOLTAGE134

PCB

Next: End

RETURN EXT CONTROLS134

HARNESS MAINS VOLTAGE

Next: End

DHW COOL SYS COOL

PCB

Next: End

F DISPLAYED

PCB

Next: End

DIVERTER VALVE REFITTING

DIRECTION CHOICE OR CONTINUE

Next: End

FLOW RATE

PLATE HEAT EXCHANGER

Next: End

F DISPLAYED2

PCB

Next: End

FIRES NO DEMAND

DHW SYSTEM

Next: End

FIRES NO DEMAND

PCB

Next: End

BOILER FIRES NO DEMAND 0 DISPLAYED

PCB

Next: End

DOES NOT ESTABLISH

BURNER

Next: End

BOILER FIRES NO DEMAND - CH2

PCB

Next: End

BOILER FIRES NO DEMAND - CH

PCB

Next: End

POWER OK PCB DEAD

PCB

Next: End

INTEGRAL FUSE FATIGUED

PCB

Next: End

VOLTAGE GAS TO VALVE

PCB

Next: End

BURNER DOES NOT IGNITE

HARNESS MAINS VOLTAGE & PCB

Next: End

NO DHW DEMAND

PCB

Next: End

CODE L1

PCB

Next: End

BLANK FOR L6 FAULT CODE

Z DIRECTION

Next: End

CODE C0

PCB

Next: End

CODE L1

SYSTEM INSPECTION

Next: End

LEAKING POC

KIT - REPLACEMENT - SUMP & COVER

Next: End

LEAKING POC

MANIFOLD - FLUE

Next: End

STOPPING PRESEQ BREAKING

Z DIRECTION

Next: End

DHW FLOW TURBINE SATISFACTORY

RESULT AS EXPECTED

Next: End

DIVERTER VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

DIVERTER RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

SPARK GENERATOR SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN SPEED CONTROL VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN VOLTAGE 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 VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

RETURN 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

SENSOR DHW TURBINE (QADAI)

KIT - FLOW SENSOR C/W TURBINE

Next: End

FAN RUNS PUMP DOES NOT - ERP

PUMP HEAD

Next: End

DIVERTER VOLTAGE DHW SATISFACTORY

RESULT AS EXPECTED

Next: End

FAULT CODE L1 ERP

PUMP HEAD

Next: End

FURTHER INVESTIGATION FUSE

PUMP HEAD

Next: End

FURTHER INVESTIGATION FUSE ERP PUMPNEW GAS VALVE

MOTOR DIVERTER VALVE

Next: End

FURTHER INVESTIGATION FUSE ERP PUMPNEW GAS VALVE

FUSE- PCB

Next: End

SPARK GEN FURTHER INVESTIGATION FUSE ERP PUMPNEW GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE ERP PUMP

PUMP HEAD

Next: End

FAN FURTHER INVESTIGATION FUSE ERP PUMP

HARNESS MAINS VOLTAGE

Next: End

GAS VALVE FURTHER INVESTIGATION FUSE ERP PUMP

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSE ERP PUMP

FUSE- PCB

Next: End

SPARK GEN FURTHER INVESTIGATION FUSE ERP PUMP

HARNESS MAINS VOLTAGE

Next: End

PUMP RUNS DHW DEMAND ERP PUMP

PUMP HEAD

Next: End

VOLTAGE GAS TO VALVE NEW GAS VALVE

PCB

Next: End

GAS VALVE MECHANICAL NEW GAS VALVE

GAS VALVE

Next: End

BURNER DOES NOT IGNITE NEW GAS VALVE

GAS VALVE AND PCB

Next: End

BURNER DOES NOT IGNITE NEW GAS VALVE

GAS VALVE

Next: End

GAS VALVE RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE (NEW STYLE) SATISFACTORY

RESULT AS EXPECTED

Next: End

ERP PUMP RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

FURTHER INVESTIGATION FUSENEW GAS VALVE

MOTOR DIVERTER VALVE

Next: End

FURTHER INVESTIGATION FUSENEW GAS VALVE

FUSE- PCB

Next: End

SPARK GEN FURTHER INVESTIGATION FUSENEW GAS VALVE

HARNESS MAINS VOLTAGE

Next: End

FURTHER INVESTIGATION FUSENEW GAS VALVE

GAS VALVE

Next: End

FURTHER INVESTIGATION FUSE ERP PUMPNEW GAS VALVE

GAS VALVE

Next: End

FURTHER INVESTIGATION FUSE ERP PUMP

MOTOR DIVERTER VALVE

Next: End

DHW NOISEY KETTLING

PLATE HEAT EXCHANGER

Next: End

CH DEMAND - DOES NOT REACT

Next: End

CH DEMAND - SEND VOLTAGE

PCB

Next: End

CH DEMANED - RETURN VOLTAGE

PCB

Next: End

RETURN EXT CONTROLS

HARNESS MAINS VOLTAGE

Next: End

CH DEMAND - DOES NOT REACT1

Next: End

CH DEMAND - SEND VOLTAGE1

PCB

Next: End

CH DEMANED - RETURN VOLTAGE1

PCB

Next: End

RETURN EXT CONTROLS1

HARNESS MAINS VOLTAGE

Next: End

CH UP TO TEMP RADS COOL

MOTOR DIVERTER VALVE

Next: End

SYSTEM PRESSURE

PIPE - EXPANSION VESSEL

Next: End

BOILER AND SYS COOL

PCB

Next: End

CH NOISY

Next: End

CH NOISEY

PCB

Next: End

NO DISPLAY

HARNESS MAINS VOLTAGE

Next: End

PREHEAT FUNCTION

PCB

Next: End

PREHEAT FUNCTION - 2

PCB

Next: End

ERROR CODE DISPLAYED

Z DIRECTION

Next: End

NO DISPLAY

FUSE (FUSED SPUR)

Next: End

NO DISPLAY

Next: End

NO DISPLAY

CUI BOARD

Next: End

NO DISPLAY

FUSE - PCB

Next: End

PUMP RUNS FOR 5 SECS

PCB

Next: End

FAN DOES NOT RUN START UP

FAN

Next: End

PUMP RUNS 5 SECONDS

HARNESS LOW VOLTAGE

Next: End

START- UP2

PUMP HEAD

Next: End

SENSOR DHW TURBINE

KIT - FLOW SENSOR C/W TURBINE

Next: End

FAN DOES NOT RUN DHW DEMAND

PCB

Next: End

DHW TOO HOT

PCB

Next: End

DHW COOL RADS HOT

MOTOR DIVERTER VALVE

Next: End

CH DEMAND - DOES NOT REACT13

Next: End

CH DEMAND - SEND VOLTAGE13

PCB

Next: End

CH DEMANED - RETURN VOLTAGE13

PCB

Next: End

RETURN EXT CONTROLS13

HARNESS MAINS VOLTAGE

Next: End

DHW COOL RADS HOT

PCB

Next: End

CH BOILER UP TO TEMP RADS COOL

Next: End

F7 CODE

PCB

Next: End

CODE L5

Z DIRECTION

Next: End

PUMP RUNS FOR 5 SECS F1

PCB

Next: End

PUMP RUNS 5 SECONDS F1

HARNESS LOW VOLTAGE

Next: End

START- UP2 L1

PUMP HEAD

Next: End

DHW HOT THEN COLD

PCB

Next: End

OVERHEAT OCCURS - DIFFERENTIAL GREATER THAN 30°C

CHARACTERISTIC TEST FROM CH OPERATION - DIFFERENTIAL OVERHEAT

Next: !p1174

FLOW TEMPERATURE GREATER THAN 85°C AND BOILER STILL FIRED

CHARACTERISTIC TEST FROM CH OPERATION - DIFFERENTIAL OVERHEAT

Next: p1064

CH OPERATION SATISFACTORY - OVERHEAT DID NOT OCCUR

CHARACTERISTIC TEST FROM CH OPERATION - DIFFERENTIAL OVERHEAT

Next: p1047

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p1183

BURNER IGNITES BUT BAFFLES OR NOISY

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p1185

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p1187

GAS INLET PRESSURE DOES NOT CHANGE

CHARACTERISTIC TEST FROM PRESSURE GAS INLET - BLIP TEST

Next: p1925

GAS INLET PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET - BLIP TEST

Next: !p1241

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p1391

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1393

F DISPLAYED - FROST PROTECTION

CHARACTERISTIC TEST FROM POWER UP - SELF TEST

Next: p1506

C DISPLAYED - CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY

Next: p1514

0 DISPLAYED - NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY

Next: !p1539

SUMP UNSATISFACTORY

Next: !p1682

FLUE MANIFOLD UNSATISFACTORY

Next: !p1684

DIAGNOSTICS LITE OPTION

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1687

QUICK ACCESS DATA AND INFORMATION OPTION

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1689

HEADER FOR QUICK ACCESS DATA FLOW THERMISTOR

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1691

HEADER FOR QUICK ACCESS DATA RETURN THERMISTOR

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1693

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1695

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1697

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1699

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1701

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1703

HEADER FOR QUICK ACCESS DATA FAN VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1705

HEADER FOR QUICK ACCESS DATA FAN SPEED CONTROL

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1707

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1709

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR VOLTAGE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1711

HEADER FOR QUICK ACCESS DATA DIVERTER RESISTANCE

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1713

HEADER FOR QUICK ACCESS DATA DIVERTER VOLTAGE CH

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1715

NEEDED OR PRESEQ MESSES UP DIVERTER VOLTAGE FOR SOME REASON

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: !p1717

HEADER FOR DHW FLOW SWITCH

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1719

HEADER FOR QUICK ACCESS DATA DIVERTER VOLTAGE DHW

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1772

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE (ERP)

CHARACTERISTIC TEST FROM NEW QADAI OPTIONS

Next: p1956

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p810

DHW COOL- RADS HOT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p348

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p956

DHW COOL RADS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1615

DHW - BOILER NOISY KETTLING

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p354

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p408

BOILER NOISY KETTLING

CHARACTERISTIC TEST FROM CH OPERATION - DHW NOISEY KETTLING

Next: p396

CH BOILER NOISY KETTLING

CHARACTERISTIC TEST FROM CH OPERATION

Next: p486

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1645

BOILER UP TO TEMPERATURE RADS COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p518

NO DISPLAY

CHARACTERISTIC TEST FROM POWER UP - SELF TEST

Next: p52

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM POWER UP - SELF TEST

Next: p600

BOILER AND SYSTEM TEMPERATURE COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1658

TEMPERATURE DIFFERENTIAL INCORRECT - LOCAL NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL FLOW RETURN

Next: !p1287

DIFFERENTIAL OK - SYSTEM NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL FLOW RETURN

Next: !p573

PRE-HEAT DOES NOT ENABLE

CHARACTERISTIC TEST FROM PRE- HEAT OPERATION

Next: p592

PRE-HEAT OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM PRE- HEAT OPERATION

Next: p595

F DISPLAYED - FROST PROTECTION

CHARACTERISTIC TEST FROM POWER UP - SELF TEST

Next: p1408

PUMP RUNS BUT FAN DOES NOT

CHARACTERISTIC TEST FROM POWER UP - SELF TEST

Next: p744

FAN RUNS BUT PUMP ONLY RUNS FOR APPROXIMATELY 3 SECONDS

CHARACTERISTIC TEST FROM POWER UP - SELF TEST

Next: p754

FAN RUNS BUT PUMP DOES NOT

CHARACTERISTIC TEST FROM POWER UP - SELF TEST

Next: p84

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p848

VOLTAGE NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE DIVERTER VALVE DHW AT PCB

Next: !p860

25/04/2023 10:55:51 2211_2_50_2 21/06/2023 10:44:02

26/04/2023 13:13:29

Next: End

RESISTANCE DETECTION LEAD

REMOVE THE FLAME DETECTION CAP FROM DETECTION ELECTRODE AND
X3 CONNECTOR FROM PCB

Next: p1085, f1086

RESISTANCE HARNESS DETECTION

REMOVE X3 CONNECTOR FROM THE PCB AND DISCONNECT FLAME
SENSE LEAD INLINE CONNECTOR

Next: !p1087, !f1088

PUMP LIMPET TEST

Next: p1127, !f1126

OBSERVATION PUMP TYPE

Next: p1798, f1819

RESISTANCE FAN

REMOVE MAINS CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1141, !f1142

RESISTANCE DIVERTER VALVE HARNESS

REMOVE X2 FROM THE P

Next: !p1279, !f1265

RESISTANCE GAS VALVE FURTHER INVESTIGATION FUSE

REMOVE CONNECTOR FROM GAS VALVE

Next: !p1154, !f1155

RESISTANCE SPARK GENERATOR

REMOVE CONNECTOR TO SPARK GENERATOR

Next: !p1159, !f1160

RESISTANCE FLOW THERMISTOR AND HARNESS

REMOVE CONNECTOR X6

Next: !p1162, f1163

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1164, !f1165

RESISTANCE RETURN THERMISTOR AND HARNESS

REMOVE CONNECTOR X6

Next: !p1167, f1168

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1169, !f1170

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1177, !f1178

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1179, !f1180

INSPECTION CONDENSATE PIPE

Next: !p1190, !f1191

RESISTANCE DETECTION LEAD

REMOVE THE FLAME DETECTION CAP FROM DETECTION ELECTRODE AND
X3 CONNECTOR FROM PCB

Next: p1550, f1201

RESISTANCE HARNESS DETECTION

REMOVE X3 CONNECTOR FROM THE PCB AND DISCONNECT FLAME
SENSE LEAD INLINE CONNECTOR

Next: !p1202, !f1203

INSPECTION CONDENSATE PIPE

Next: !p1206, !f1207

INSPECTION CONDENSATE PIPE

Next: !p1222, !f1223

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}
SELE

Next: p1228, f1229

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1230, !f1231

INSPECTION INTERNAL BYPASS VALVE

DRAIN PRIMARY SYSTEM WATER
REMOVE INTERNAL BYPASS VALVE

Next: !p1285, !f1286

INFORMATION - RECENTLY REPLACED PCB

Next: !p1678, !f1299

DIFFERENTIAL PRIMARY HEAT EXCHANGER

SELECTOR SWITCH SET

Next: !p1389, ?1390, ?1392

VOLTAGE EXTERNAL CONTROLS - SEND

SELECTOR SWITCH SET TO CH/DHW
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: !p1396, f1397

RESISTANCE MAINS HARNESS SEND EXT CONTROLS

REMOVE X1 CONNECTOR FROM THE PCB

Next: !p1398, !f1399

RESISTANCE TIMER

REMOVE CONNECTIONS 3 AND 4 FROM THE INTERNAL TIMER

Next: !p1402, !f1403

DIVERTER VALVE ACTUATOR REFITTING PROCEDURE

1. ENSURE TH

Next: !p1428, !f1429

OBSERVATION DISPLAY

SELECTOR SWITCH SET

Next: p1533, ?1505, ?1513, ?1538

DISCONNECT EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: !p1564, !f1540

DISCONNECT DHW FLOW TURBINE

REMOVE CONNECTOR TO

Next: !p1536, !f1537

INFORMATION INTEGRAL FUSE

Next: !p1601, !f1602

RESISTANCE GAS VALVE AND HARNESS

REMOVE X3 CONNECTOR FROM THE PCB

Next: !p1608, f1609

RESISTANCE GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE

Next: !p1610, !f1611

VOLTAGE 5 VDC TO DHW TURBINE AT PCB

SELECTOR SWITCH SET TO DHW
PREHEAT SWITCHED OFF

Next: p1767, !f1768

RESISTANCE PUMP HARNESS (ERP)

DISCONNECT MAINS VOL

Next: !p1780, !f1976

RESISTANCE PUMP HARNESS (ERP)

DISCONNECT MAINS VOL

Next: !p1796, !f1797

RESISTANCE PUMP HARNESS FURTHER INVESTIGATION FUSE

REMOVE CONNECTOR FROM PUMP AND X1 FROM THE PCB

Next: !p1817, !f1818

RESISTANCE PUMP AND HARNESS (ERP)

REMOVE X1 FROM THE PCB

Next: p1820, f1821

RESISTANCE PUMP HARNESS FURTHER INVESTIGATION FUSE (ERP)

DISCONNECT MAINS VOLTAGE PLUG FROM PUMP
DISCONNECT X1 FROM THE PCB

Next: !p1910, !f1974

RESISTANCE FAN

REMOVE MAINS CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1912, !f1913

RESISTANCE GAS VALVE FURTHER INVESTIGATION FUSE

REMOVE CONNECTOR FROM GAS VALVE

Next: !p1914, !f1915

RESISTANCE DIVERTER VALVE HARNESS

REMOVE X2 FROM THE P

Next: !p1979, !f1980

RESISTANCE SPARK GENERATOR

REMOVE CONNECTOR TO SPARK GENERATOR

Next: !p1919, !f1920

RESISTANCE GAS VALVE AND HARNESS (NEW STYLE)

REMOVE X3 CONNECTOR FROM THE PCB

Next: p1898, f1899

RESISTANCE HARNESS GAS VALVE (NEW STYLE) FURTHER INVESTIGATION FUSE

REMOVE CONNECTOR FROM GAS VALVE
REMOVE X3 FROM THE PCB

Next: !p1977, !f1978

RESISTANCE DIVERTER VALVE HARNESS

REMOVE X2 FROM THE P

Next: !p1904, !f1905

RESISTANCE SPARK GENERATOR

REMOVE CONNECTOR TO SPARK GENERATOR

Next: !p1908, !f1909

RESISTANCE PUMP HARNESS (ERP)

DISCONNECT MAINS VOL

Next: !p1923, !f1975

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p1927, f1928

RESISTANCE GAS VALVE AND HARNESS (NEW STYLE)

REMOVE X3 CONNECTOR FROM THE PCB

Next: !p1929, f1930

RESISTANCE HARNESS GAS VALVE (NEW STYLE)

REMOVE CONNECTOR FROM GAS VALVE
PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1943, !f1944

RESISTANCE HARNESS GAS VALVE (NEW STYLE)

REMOVE CONNECTOR FROM GAS VALVE
PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1946, !f1947

RESISTANCE GAS VALVE AND HARNESS (NEW STYLE)

REMOVE X3 CONNECTOR FROM THE PCB

Next: !p1953, !f1954

RESISTANCE GAS VALVE AND HARNESS (NEW STYLE)

REMOVE X3 CONNECTOR FROM THE PCB

Next: p1960, f1961

RESISTANCE HARNESS GAS VALVE (NEW STYLE) FURTHER INVESTIGATION FUSE

REMOVE CONNECTOR FROM GAS VALVE
REMOVE X3 FROM THE PCB

Next: !p1972, !f1973

RESISTANCE DIVERTER VALVE HARNESS

REMOVE X2 FROM THE P

Next: !p1966, !f1967

RESISTANCE SPARK GENERATOR

REMOVE CONNECTOR TO SPARK GENERATOR

Next: !p1970, !f1971

INSPECTION COLD FEED ISOLATION VALVE

Next: p1446, !f336

VOLTAGE EXTERNAL CONTROLS - SEND

SELECTOR SWITCH SET TO CH/DHW
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: !p413, f414

RESISTANCE MAINS HARNESS SEND EXT CONTROLS

REMOVE X1 CONNECTOR FROM THE PCB

Next: !p415, !f416

RESISTANCE TIMER

REMOVE CONNECTIONS 3 AND 4 FROM THE INTERNAL TIMER

Next: !p419, !f420

VOLTAGE EXTERNAL CONTROLS - SEND

SELECTOR SWITCH SET TO CH/DHW
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: !p491, f492

RESISTANCE MAINS HARNESS SEND EXT CONTROLS

REMOVE X1 CONNECTOR FROM THE PCB

Next: !p493, !f494

RESISTANCE TIMER

REMOVE CONNECTIONS 3 AND 4 FROM THE INTERNAL TIMER

Next: !p497, !f498

VOLTAGE DIVERTER VALVE CH AT PCB

{GAINPCBACS}
SELE

Next: p512, !f506

INSPECTION EXPANSION VESSEL PRESSURE

DISCHARGE PRIMARY SYSTEM WATER

Next: !p545, !f546

VOLTAGE MAINS INPUT PCB

{GAINPCBACS}
SELE

Next: p57, f58

VOLTAGE MAINS INPUT TERMINAL BLOCK

SELECTOR SWITCH SET TO OFF

Next: !p59, f60

RESISTANCE FUSE (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p61, f603

FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p604, !f605

FUSE FURTHER INVESTIGATION - F1

THE INFORMATION PROV

Next: !p696, !f608

RESISTANCE WATER PRESSURE SWITCH

REMOVE CONNECTIONS TO WATER PRESSURE SWITCH

Next: !p767, !f760

VOLTAGE PUMP PCB

{GAINPCBACS}
SELE

Next: p1787, !f791

VOLTAGE DHW FLOW TURBINE OUTPUT AT PCB

{GAINPCBACS}
SELECTOR SWITCH SET TO DHW
PREHEAT SWITCHED OFF

Next: p1612, f797

VOLTAGE 5 VDC TO DHW TURBINE AT PCB

SELECTOR SWITCH SET TO DHW
PREHEAT SWITCHED OFF

Next: p798, !f799

RESISTANCE FLOW THERMISTOR AND HARNESS

REMOVE CONNECTOR X6

Next: p803, f1175

VOLTAGE EXTERNAL CONTROLS - SEND

SELECTOR SWITCH SET TO CH/DHW
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: !p851, f852

RESISTANCE MAINS HARNESS SEND EXT CONTROLS

REMOVE X1 CONNECTOR FROM THE PCB

Next: !p853, !f854

RESISTANCE TIMER

REMOVE CONNECTIONS 3 AND 4 FROM THE INTERNAL TIMER

Next: !p857, !f858

VOLTAGE MAINS INPUT - F7 FAULT CODE

{GAINPCBACS}
SELECTOR SWITCH SET TO OFF

Next: !p894, !f895

POWER OFF BOILER RESET

AFTER POWER OFF, WAIT 15 SECONDS BEFORE POWER ON

Next: !p902, !f903

INSPECTION SYSTEM PRESSURE

Next: p920, !f921

RESISTANCE WATER PRESSURE SWITCH

REMOVE CONNECTIONS TO WATER PRESSURE SWITCH

Next: !p924, !f925

RESET BOILER

SELECTOR SWITCH SET TO DHW/CH
ENSURE BOILER IS COOL AND NO DEMAND FOR DHW AND CH

Next: p1000, f938

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p940, !f941

VOLTAGE PUMP PCB

{GAINPCBACS}
SELE

Next: p1791, !f953

INSPECTION SYSTEM PRESSURE

Next: p1016, !f1015

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p946, !f1031

DHW OPERATION - OVERHEAT

SELECTOR SWITCH SET TO CH/DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: p1679, !f1049

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p1060, !f1059

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1061, !f1063

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p1065, !f1066

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1067, !f1068

INSPECTION DETECTION ELECTRODE

REMOVE THE DETECTION ELECTRODE

Next: p1670, !f1090

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: p1128, !f1129

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1130, !f1131

RESISTANCE FAN AND MAINS HARNESS

REMOVE X3 CONNECTOR FROM THE PCB

Next: p1840, f1140

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE X2 CONNECTOR FROM THE PCB

Next: p1156, f1144

RESISTANCE GAS VALVE AND HARNESS

REMOVE X3 CONNECTOR FROM THE PCB

Next: p1139, f1153

RESISTANCE SPARK GENERATOR AND HARNESS

Next: !p1157, f1158

INSPECTION CONDENSATE TRAP

NOTE.
TAKE

Next: p1220, f1221

INSPECTION CONDENSATE TRAP

NOTE.
TAKE

Next: p1204, f1205

INSPECTION CONDENSATE TRAP

NOTE.
TAKE

Next: p1188, f1189

INSPECTION HEAT EXCHANGER SUMP

REMOVE SUMP INSPECTI

Next: p1192, !f1193

PRESSURE GAS INLET

SELECTOR SWITCH SET

Next: p1194, !f1195

VOLTAGE DETECTION ELECTRODE AT PCB

{GAINPCBACS}
SELE

Next: p1196, !f1197

VOLTAGE DETECTION ELECTRODE BURNER ON - PCB

SELECTOR SWITCH SET

Next: !p1198, f1199

INSPECTION HEAT EXCHANGER SUMP

REMOVE SUMP INSPECTI

Next: p1208, !f1209

PRESSURE GAS INLET

SELECTOR SWITCH SET

Next: p1210, !f1211

INSPECTION FLUE

Next: p1212, !f1213

INSPECTION INJECTOR

REMOVE INJECTOR FROM FAN ASSEMBLY

Next: p1214, !f1215

INSPECTION BURNER

REMOVE THE BURNER

Next: p1216, !f1217

INSPECTION HEAT EXCHANGER - FLUE WAYS

Next: !p1218, !f1219

INSPECTION HEAT EXCHANGER SUMP

REMOVE SUMP INSPECTI

Next: p1224, !f1225

OBSERVATION SPARK OUTPUT

SELECTOR SWITCH SET

Next: p1226, f1227

PRESSURE GAS INLET - BLIP TEST

SELECTOR SWITCH SET

Next: p1236, ?1238, ?1240

RESISTANCE SPARK ELECTRODE LEAD

REMOVE SPARK ELECTRODE LEAD FROM BOILER

Next: p1232, !f1233

RESISTANCE HARNESS SPARK GENERATOR

REMOVE X3 CONNECTOR FROM THE PCB AND THE
CONNECTOR TO SPARK GENERATOR

Next: !p1234, !f1235

INSPECTION INJECTOR

REMOVE INJECTOR FROM FAN ASSEMBLY

Next: p1256, !f1257

VOLTAGE GAS VALVE AT VALVE

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: p1242, f1607

RESISTANCE GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE

Next: p1246, !f1247

INSPECTION INJECTOR

REMOVE INJECTOR FROM FAN ASSEMBLY

Next: p1248, !f1249

INSPECTION BURNER

REMOVE THE BURNER

Next: p1250, !f1251

INSPECTION HEAT EXCHANGER - FLUE WAYS

Next: p1252, !f1253

INSPECTION FLUE

Next: !p1254, !f1255

INSPECTION BURNER

REMOVE THE BURNER

Next: p1258, !f1259

INSPECTION ELECTRODE

CAREFULLY REMOVE BURNER FROM BOILER.

Next: p1260, !f1261

INSPECTION HEAT EXCHANGER - FLUE WAYS

Next: !p1262, !f1263

OBSERVATION TEMPERATURE FLOW AND RETURN

SELECTOR SWITCH SET

Next: p883, f1284

PUMP LIMPET TEST

Next: p1381, !f1382

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p1383, !f1384

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: p1387, !f1386

DIFFERENTIAL PLATE HEAT EXCHANGER

SELECTOR SWITCH SET

Next: p1405, f1388

VOLTAGE EXTERNAL CONTROLS - RETURN

{GAINPCBACS}
SELE

Next: p1394, f1395

VOLTAGE EXTERNAL CONTROLS - RETURN PCB

SELECTOR SWITCH SET

Next: !p1400, f1401

RESISTANCE DHW POTENTIOMETER TEMP

TO EXPOSE THE CONTROLS PCB, LIFT UP THE MAIN PCB
REMOVE RIBBON CABLE FROM CONTROLS PCB

Next: !p1406, !f1407

TEMPERATURE FLOW AND RETURN - FROST PROTECTION

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPES

Next: p1409, !f1410

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p1411, !f1412

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1413, !f1414

OBSERVATION COLD WATER SUPPLY

Next: p335, !f1452

TEMPERATURE FLOW AND RETURN - FROST PROTECTION

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPES

Next: p1507, !f1508

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p1509, !f1510

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1511, !f1512

VOLTAGE EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: p1515, !f1516

OBSERVATION FROST STAT FITTED

Next: p1517, f1518

DISCONNECT EXTERNAL FROST STAT

SELECTOR SWITCH SET

Next: p1521, !f1522

DISCONNECT EXTERNAL CONTROLS

SELECTOR SWITCH SET

Next: !p1561, !f1541

ISOLATE DHW COLD FEED

ISOLATE DHW COLD FEE

Next: !p1534, f1535

INSPECTION DETECTION ELECTRODE

REMOVE THE DETECTION ELECTRODE

Next: p1554, !f1555

INSPECTION DETECTION ELECTRODE POSITION

CAREFULLY REMOVE BURNER FROM BOILER.

Next: !p1558, !f1557

PRESSURE GAS INLET

SELECTOR SWITCH SET

Next: p1380, !f1592

VOLTAGE 5VDC TO DISPLAY PCB

{GAINPCBACS}
SELECTOR SWITCH SET TO OFF

Next: p55, !f1597

RESISTANCE PCB INTEGRAL FUSE

DISCONNECT ALL CONNECTORS FROM THE PCB
REMOVE AND FLIP THE PCB ONTO ITS BACK

Next: !p1599, f1600

INSPECTION SELECTOR SWITCH KNOB

Next: !p1613, !f1614

INSPECTION DHW CONTROL KNOB

Next: p1565, !f1644

INSPECTION SELECTOR SWITCH KNOB

Next: p488, !f1657

INSPECTION CH CONTROL KNOB

Next: p558, !f1666

INFORMATION - RECENTLY REPLACED PCB

Next: !p1668, !f1669

TIGHTNESS TEST INSTALLATION

Next: p1671, !f1672

OBSERVATION FAULT CODE RESET (L6)

Next: !p1673, !f1674

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p1680, ?1681, ?1683

DIAGNOSTICS LITE

DIAGNOSIS RELIES ON

Next: !p1762, !f1763

QUICK ACCESS DATA AND INFORMATION


THE TABLE BELOW

Next: !p1760, !f1761

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1758, !f1759

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1756, !f1757

VOLTAGE GAS VALVE AT VALVE

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: !p1754, !f1755

OBSERVATION GAS VALVE TYPE

Next: p1948, f1952

RESISTANCE PUMP AND HARNESS

REMOVE X1 FROM THE PCB

Next: !p1750, !f1751

VOLTAGE PUMP PCB

{GAINPCBACS}
SELE

Next: !p1748, !f1749

RESISTANCE FAN

REMOVE MAINS CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1746, !f1747

VOLTAGE MAINS FAN PCB

{GAINPCBACS}
SELE

Next: !p1738, !f1765

VOLTAGE FAN CONTROL AT PCB

SELECTOR SWITCH SET

Next: !p1736, !f1737

RESISTANCE SPARK GENERATOR

REMOVE CONNECTOR TO SPARK GENERATOR

Next: !p1734, !f1735

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}
SELE

Next: !p1732, !f1733

RESISTANCE DIVERTER VALVE AND HARNESS (QADAI)

REMOVE X2 CONNECTOR FROM THE PCB

Next: !p1730, !f1731

VOLTAGE DIVERTER VALVE CH AT PCB

{GAINPCBACS}
SELE

Next: !p1728, !f1729

VOLTAGE DHW FLOW TURBINE OUTPUT AT PCB

{GAINPCBACS}
SELECTOR SWITCH SET TO DHW
PREHEAT SWITCHED OFF

Next: !p1720, f1766

RESISTANCE HARNESS TO DHW TURBINE

REMOVE X8 FROM THE PCB AND CONNECTOR AT DHW FLOW TURBINE

Next: !p1769, !f1770

VOLTAGE DIVERTER VALVE DHW AT PCB

{GAINPCBACS}
SELE

Next: !p1782, !f1774

OBSERVATION PUMP TYPE

Next: p87, f1779

OBSERVATION PUMP TYPE

Next: p790, f1922

OBSERVATION PUMP TYPE

Next: p952, f1795

RESISTANCE PUMP AND HARNESS

REMOVE X1 FROM THE PCB

Next: p1135, f1816

RESISTANCE FAN AND MAINS HARNESS

REMOVE X3 CONNECTOR FROM THE PCB

Next: p1896, f1825

RESISTANCE GAS VALVE AND HARNESS

REMOVE X3 CONNECTOR FROM THE PCB

Next: p1828, f1829

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE X2 CONNECTOR FROM THE PCB

Next: p1832, f1833

RESISTANCE SPARK GENERATOR AND HARNESS

Next: !p1918, f1837

OBSERVATION GAS VALVE TYPE

Next: p1147, f1959

OBSERVATION GAS VALVE TYPE

Next: p1824, f1897

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE X2 CONNECTOR FROM THE PCB

Next: p1902, f1903

RESISTANCE SPARK GENERATOR AND HARNESS

Next: !p1906, f1907

OBSERVATION GAS VALVE TYPE

Next: p1239, f1926

RESISTANCE GAS VALVE AND HARNESS (NEW STYLE)

REMOVE X3 CONNECTOR FROM THE PCB

Next: p1933, f1945

INSPECTION INJECTOR

REMOVE INJECTOR FROM FAN ASSEMBLY

Next: p1935, !f1936

INSPECTION BURNER

REMOVE THE BURNER

Next: p1937, !f1938

INSPECTION HEAT EXCHANGER - FLUE WAYS

Next: p1939, !f1940

INSPECTION FLUE

Next: !p1941, !f1942

RESISTANCE GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE

Next: !p1950, !f1951

RESISTANCE PUMP AND HARNESS (ERP)

REMOVE X1 FROM THE PCB

Next: !p1957, !f1958

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE X2 CONNECTOR FROM THE PCB

Next: p1964, f1965

RESISTANCE SPARK GENERATOR AND HARNESS

Next: !p1968, f1969

INSPECTION DHW FILTER AND FLOW REGULATOR

ISOLATE COLD WATER F

Next: !p1455, !f338

OBSERVATION DIVERTER VALVE DHW POSITION

SELECTOR SWITCH SET TO DHW
DHW TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: p836, !f843

CH OPERATION - DHW NOISY KETTLING

SELECTOR SWITCH SET TO DHW/CH
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: !p392, ?393, ?395

PUMP LIMPET TEST

Next: p403, !f398

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p404, !f405

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p1288, !f407

VOLTAGE EXTERNAL CONTROLS - RETURN

{GAINPCBACS}
SELE

Next: p409, f410

VOLTAGE EXTERNAL CONTROLS - RETURN PCB

SELECTOR SWITCH SET

Next: !p418, f417

PUMP LIMPET TEST

Next: p568, !f567

VOLTAGE EXTERNAL CONTROLS - RETURN

{GAINPCBACS}
SELE

Next: p489, f490

VOLTAGE EXTERNAL CONTROLS - RETURN PCB

SELECTOR SWITCH SET

Next: !p495, f496

OBSERVATION DIVERTER VALVE CH POSITION

SELECTOR SWITCH SET TO CH/DHW
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: p1280, f504

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p517, !f508

INSPECTION DIVERTER VALVE PADDLE

REMOVE DIVERTER VALVE ACTUATOR, TO REMOVE PULL HEAD TOWARDS GAS PIPE

Next: p505, !f516

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p861, !f530

FAN AND PUMP RUNNING AT POWER UP

SELECTOR SWITCH SET TO OFF

Next: p1593, f56

RESISTANCE DISPLAY HARNESS

REMOVE RIBBON CONNECTOR FROM THE CONTROLS PCB

Next: !p65, !f66

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p559, !f560

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: p561, !f562

RESISTANCE CH POTENTIOMETER TEMP

TO EXPOSE THE CONTROLS PCB, LIFT UP THE MAIN PCB
REMOVE RIBBON CABLE FROM CONTROLS PCB

Next: !p563, !f564

DIFFERENTIAL FLOW RETURN

SELECTOR SWITCH SET

Next: p569, ?570, ?572

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p575, !f576

RESISTANCE FUSE F1

REMOVE FUSE FROM PCB

Next: p1598, f606

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p577, !f578

RESISTANCE DHW POTENTIOMETER TEMP

TO EXPOSE THE CONTROLS PCB, LIFT UP THE MAIN PCB
REMOVE RIBBON CABLE FROM CONTROLS PCB

Next: !p593, !f594

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p596, !f597

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p598, !f599

FAULT CODES

Next: !p601, !f602

VOLTAGE MAINS FAN PCB

{GAINPCBACS}
SELE

Next: p745, !f746

VOLTAGE FAN CONTROL AT PCB

SELECTOR SWITCH SET

Next: p747, !f763

RESISTANCE MAINS HARNESS TO FAN

REMOVE CONNECTOR FROM THE FAN AND X3 CONNECTOR FROM PCB

Next: p764, !f752

INSPECTION SYSTEM PRESSURE

Next: p755, !f756

RESISTANCE WATER PRESSURE SWITCH AND HARNESS

REMOVE X8 FROM THE PCB

Next: !p757, f758

RESISTANCE FAN CONTROL HARNESS

REMOVE CONNECTOR FROM FAN ASSEMBLY AND
X8 CONNECTOR FROM PCB

Next: !p765, !f766

RESISTANCE PUMP HARNESS

REMOVE CONNECTOR FROM PUMP AND X1 FROM THE PCB

Next: !p792, !f793

RESISTANCE HARNESS TO DHW TURBINE

REMOVE X8 FROM THE PCB AND CONNECTOR AT DHW FLOW TURBINE

Next: !p800, !f801

RESISTANCE RETURN THERMISTOR AND HARNESS

REMOVE CONNECTOR X6

Next: p805, f1176

RESISTANCE DHW POTENTIOMETER TEMP

TO EXPOSE THE CONTROLS PCB, LIFT UP THE MAIN PCB
REMOVE RIBBON CABLE FROM CONTROLS PCB

Next: !p807, !f808

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p811, !f812

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: p813, !f814

RESISTANCE DHW POTENTIOMETER TEMP

TO EXPOSE THE CONTROLS PCB, LIFT UP THE MAIN PCB
REMOVE RIBBON CABLE FROM CONTROLS PCB

Next: !p815, !f816

VOLTAGE DIVERTER VALVE DHW AT PCB

{GAINPCBACS}
SELE

Next: p837, ?847, ?859

INSPECTION DIVERTER VALVE PADDLE

REMOVE DIVERTER VALVE ACTUATOR, TO REMOVE PULL HEAD TOWARDS GAS PIPE

Next: p839, !f840

RESISTANCE HARNESS DIVERTER VALVE

REMOVE X2 FROM THE P

Next: !p841, !f842

VOLTAGE PUMP PCB

{GAINPCBACS}
SELE

Next: p1775, !f88

VOLTAGE EXTERNAL CONTROLS - RETURN

{GAINPCBACS}
SELE

Next: p849, f850

VOLTAGE EXTERNAL CONTROLS - RETURN PCB

SELECTOR SWITCH SET

Next: !p855, f856

PUMP LIMPET TEST

Next: p503, !f879

RESISTANCE PUMP HARNESS

REMOVE CONNECTOR FROM PUMP AND X1 FROM THE PCB

Next: !p108, !f90

INSPECTION EXTERNAL BYPASS

Next: !p884, !f885

RESISTANCE WATER PRESSURE SWITCH AND HARNESS

REMOVE X8 FROM THE PCB

Next: !p922, f923

PUMP LIMPET TEST

Next: p944, !f945

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: p1667, !f943

CH OPERATION - DIFFERENTIAL OVERHEAT

SELECTOR SWITCH SET

Next: p1058, ?1042, ?1044, ?1046

OBSERVATION PUMP RUNNING

SELECTOR SWITCH SET TO CH/DHW
CH TEMPERATURE CONTROL SET TO MAX
PREHEAT SWITCHED OFF

Next: p937, f951

RESISTANCE PUMP HARNESS

REMOVE CONNECTOR FROM PUMP AND X1 FROM THE PCB

Next: !p954, !f955

PUMP LIMPET TEST

Next: p957, !f958

DIFFERENTIAL PLATE HEAT EXCHANGER

SELECTOR SWITCH SET

Next: p959, !f960

RESISTANCE FLOW THERMISTOR

REMOVE CONNECTOR FRO

Next: p961, !f962

RESISTANCE RETURN THERMISTOR

REMOVE CONNECTOR FRO

Next: !p963, !f964

System Information

  • Total Tests: 683
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control