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:

GLOWWORM BETACOM

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

INFORMATION CASE REMOVAL


Next: &829, !f2

OBSERVATION DISPLAY OPERATES AND SELF CHECK

ENSURE NO DEMANDS ARE PRESENT

Next: &92, ?4, ?8, ?10

FUSE INVESTIGATION TREE

OUTSIDE MODEL

Next: &nff, f36

30 DEG FLASHING - CH SENSOR

OUTSIDE MODEL

Next: &nff, f85

90 DEG FLASHING - IGNITION FAILURE - DUMMY GO TO BURNER IGNITES

OUTSIDE MODEL

Next: &nff, !f62

80 DEG FLASHING - OVERHEAT

OUTSIDE MODEL

Next: &nff, f63

70 DEG FLASHING - APS FAULT

OUTSIDE MODEL

Next: &nff, f126

60 DEG FLASHING - LOW PRESSURE

OUTSIDE MODEL

Next: &nff, f64

50 DEG FLASHING - OUTDOOR SENSOR

OUTSIDE MODEL

Next: &nff, f77

40 DEG FLASHING - DHW SENSOR

OUTSIDE MODEL

Next: &nff, f78

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &105, !f104

OBSERVATION DHW FLOW RATE

Next: &122, f106

OBSERVATION PUMP RUNS DHW DEMAND

FLOW RATE SET TO 3 LITRES/MIN

Next: &153, f123

OBSERVATION FAN RUNS DHW DEMAND

DHW TEMPERATURE SET TO MAX
ENSURE BOILER IS COOL

Next: &178, f165

OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: &270, ?179, ?181, ?183, ?185

PRESSURE GAS VALVE MAXIMUM AND MINIMUM

DISCONNECT ONE LEAD

Next: &646, ?1041, ?1043

OPERATION DHW

DHW TEMPERATURE SET TO MAX

Next: &276, ?300, ?308, ?475, ?486

OBSERVATION DHW MODULATION

DHW FLOW RATE APPROX. 9 LITRES/MIN
ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: &277, f512

OPERATION CH

CH TEMPERATURE CONTROL SET TO MAX

Next: &278, ?471, ?679, ?784

OBSERVATION CH MODULATION

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: &279, f638

OBSERVATION PUMP OVERRUN

ENSURE NO DEMANDS ARE PRESENT

Next: &nff, !f637

OBSERVATION BOILER RESPONDS TO CH DEMAND

Next: &275, f699

INFORMATION BOILER SETUP

Next: &3, !f830

INSPECTION WIRING HARNESS

Next: &828, !f831

INFORMATION PCB DIP SWITCHES

Next: &nff, !f984

80 DEG FLASHING - NO POWER TO PUMP

PCB - MAIN - SIT VALVE

Next: End

FUSE INVESTIGATION

SENSOR - EDGE CONNECTION - WATER FLOW (WATER DAMAGE)

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

PIM-2 (SELECTOR SWITCH KNOB)

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND

PIM-2 (SELECTOR SWITCH KNOB)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - LOW PRESSURE - MODUREG

GAS VALVE

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM

GAS INLET PRESSURE

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM - MINIMUM WRONG

GAS INLET PRESSURE

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM - MINIMUM WRONG

GAS VALVE

Next: End

OBSERVATION DHW FLOW RATE

WATER SUPPLY

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM - MODUREG MAX WRONG

GAS VALVE

Next: End

PRESSURE GAS VALVE MAXIMUM AND MINIMUM

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

PRESSURE GAS VALVE MAXIMUM AND MINIMUM

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM

PIM-1 (DHW TEMPERATURE KNOB)

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM

PCB - INTERFACE

Next: End

OBSERVATION DHW FLOW RATE

SET - VALVES

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM

GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - BAFFLES

INJECTOR

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES

BURNER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES

HEAT EXCHANGER (FLUEWAYS)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES

FLUE

Next: End

OBSERVATION DHW FLOW RATE

LIMITER / HYDROBLOCK TURBINE AND MAGNET

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES

FAN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES

DIAPHRAGM (RESTRICTOR)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES

INJECTOR

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - MODUREG

GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - LOW PRESSURE

BURNER

Next: End

PRESSURE GAS VALVE MAXIMUM AND MINIMUM

CABLE - MAIN BOARD TO INTERFACE BOARD

Next: End

OBSERVATION DHW MODULATION

CABLE - MAIN BOARD TO INTERFACE BOARD

Next: End

OBSERVATION CH MODULATION

CABLE - MAIN BOARD TO INTERFACE BOARD

Next: End

OPERATION DHW - DHW TOO HOT

CABLE - MAIN BOARD TO INTERFACE BOARD

Next: End

70 DEG FLASHING - FAN

HARNESS - WIRING C/W BASIC TIMER

Next: End

70 DEG FLASHING - SHORTED

SWITCH - PRESSURE - AIR

Next: End

50 DEG FLASHING

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION PUMP RUNS DHW DEMAND - NO VOLTAGE TO TURBINE

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION PUMP RUNS DHW DEMAND - TURBINE

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE F1 / F2

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

HYDROBLOCK - TURBINE AND MAGNET

Next: End

OBSERVATION FAN RUNS DHW DEMAND - SHORTED

SWITCH - PRESSURE - AIR

Next: End

OBSERVATION FAN RUNS DHW DEMAND

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

OBSERVATION FAN RUNS DHW DEMAND

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

OBSERVATION FAN RUNS DHW DEMAND - FAN

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO SPARKING

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - NO PRESSURE

GAS INLET PRESSURE

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - NO PRESSURE

PCB - MAIN AND GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - LOW PRESSURE

GAS INLET PRESSURE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - LOW PRESSURE

GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION

BURNER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - BAFFLES

BURNER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - BAFFLES

HEAT EXCHANGER (FLUEWAYS)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - BAFFLES

FLUE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - BAFFLES

FAN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - BAFFLES

DIAPHRAGM (RESTRICTOR)

Next: End

OBSERVATION DISPLAY ILLUMINATES

FUSE (MAINS)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - DAMAGED

CONTROL ELECTRODE (RECTIFICATION)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - RESISTANCE

CONTROL ELECTRODE (RECTIFICATION)

Next: End

OPERATION DHW - DHW COOL RADS WARM

PCB - MAIN - SIT VALVE

Next: End

OPERATION DHW - DHW COOL RADS WARM

HARNESS - WIRING C/W BASIC TIMER

Next: End

DHW COOL RADS COOL

PUMP ASSEMBLY

Next: End

DHW COOL RADS COOL

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

DHW COOL RADS COOL

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

FUSE INVESTIGATION

PUMP ASSEMBLY

Next: End

FUSE INVESTIGATION

GAS VALVE

Next: End

OPERATION DHW - DHW COOL RADS COOL

PIM-1 (DHW TEMPERATURE KNOB)

Next: End

FUSE INVESTIGATION

MOTOR - 3-WAY VALVE / KIT - SERVICE - 3 WAY VALVE

Next: End

OPERATION DHW - DHW COOL RADS COOL

PCB - INTERFACE

Next: End

DHW COOL RADS COOL

BURNER

Next: End

DHW COOL RADS COOL

INJECTOR

Next: End

OPERATION CH - EXCESSIVE SYSTEM PRESSURE RISE

EXPANSION VESSEL 7LTR

Next: End

OPERATION DHW - DHW TOO HOT

PIM-1 (DHW TEMPERATURE KNOB)

Next: End

OPERATION DHW - DHW TOO HOT

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

OPERATION DHW - DHW TOO HOT

PCB - INTERFACE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

PIM-1 (DHW TEMPERATURE KNOB)

Next: End

OPERATION DHW - DHW RUNS HOT COLD OPERATION DHW - DHW COOL RADS COOL

PCB - INTERFACE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

PUMP ASSEMBLY

Next: End

FUSE INVESTIGATION

MOTOR - 3 - WAY VALVE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

OPERATION DHW - DHW RUNS HOT COLD

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

OPERATION DHW - DHW COOL RADS COOL

HEAT EXCHANGER - TURBO (CONDENSING) - WATERWAYS

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER - TURBO (CONDENSING) - WATERWAYS

Next: End

OBSERVATION DHW MODULATION

PIM-1 (DHW TEMPERATURE KNOB)

Next: End

OBSERVATION DHW MODULATION

PCB - INTERFACE

Next: End

OBSERVATION DHW MODULATION

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

80 DEG FLASHING

THERMOSTAT 98/70 DEG C - SAFETY (LIMIT)

Next: End

80 DEG FLASHING

THERMOSTAT 130DEG C - SAFETY (OVERHEAT)

Next: End

80 DEG FLASHING - STUCK IN FAULT

PCB - MAIN - SIT VALVE

Next: End

FUSE INVESTIGATION

FAN

Next: End

80 DEG FLASHING

PUMP ASSEMBLY

Next: End

80 DEG FLASHING

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

80 DEG FLASHING

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

90 DEG FLASHING

Z REDIRECT

Next: End

80 DEG FLASHING

HEAT EXCHANGER - TURBO (CONDENSING) - WATERWAYS

Next: End

80 DEG FLASHING

Next: End

80 DEG FLASHING - TRIPPING EARLY

THERMOSTAT 98/70 DEG C - SAFETY (LIMIT)

Next: End

80 DEG FLASHING - NO PUMP OVERRUN

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION PUMP OVERRUN

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION CH MODULATION

PCB - INTERFACE

Next: End

OBSERVATION CH MODULATION

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

OBSERVATION CH MODULATION

PIM-1 (CH TEMPERATURE KNOB)

Next: End

60 DEG FLASHING

PCB - MAIN - SIT VALVE

Next: End

BOILER COOL RADS COOL

PCB DIP SWITCHES

Next: End

FAULT CODE 2

Z REDIRECT

Next: End

60 DEG FLASHING

SWITCH - PRESSURE - LOW WATER

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - LOW VOLTAGE

CONNECTOR X20

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - LOW VOLTAGE

TIMER - PROGRAMME

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - LOW VOLTAGE - EXT CONTROLS

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - MAINS VOLTAGE

TIMER - PROGRAMME

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - MAINS VOLTAGE - EXT CONTROLS

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - INTERNAL ONLY

CONNECTOR X20

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - INTERNAL ONLY

TIMER - PROGRAMME

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - INTERNAL ONLY - EXT CONTROLS

HARNESS - WIRING C/W BASIC TIMER

Next: End

OPERATION CH - BOILER AND RADS COOL

PIM-1 (CH TEMPERATURE KNOB)

Next: End

OPERATION CH - BOILER AND RADS COOL

PCB - INTERFACE

Next: End

BOILER TO TEMP RADS DO NOT HEAT

SET - VALVES

Next: End

BOILER TO TEMP RADS DO NOT HEAT

Next: End

BOILER TO TEMP RADS DO NOT HEAT

PUMP ASSEMBLY

Next: End

BOILER TO TEMP RADS DO NOT HEAT

PCB - MAIN - SIT VALVE

Next: End

BOILER TO TEMP RADS DO NOT HEAT

HARNESS - WIRING C/W BASIC TIMER

Next: End

BOILER TO TEMP RADS DO NOT HEAT

3 WAY VALVE SERVICE KIT

Next: End

40 DEG FLASHING

PCB - MAIN - SIT VALVE

Next: End

40 DEG FLASHING

HARNESS - WIRING C/W BASIC TIMER

Next: End

OPERATION CH - BOILER UP TO TEMP RADS DO NOT HEAT

FILTER

Next: End

OPERATION CH - BOILER UP TO TEMP RADS DO NOT HEAT - BYPASS OK

FILTER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - NO PRESSURE - RESISTANCE

GAS VALVE

Next: End

INFORMATION BOILER SETUP

Z REDIRECT

Next: End

INSPECTION WIRING HARNESS

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION DISPLAY ILLUMINATES - FIRING NO DEMAND - CH

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION DISPLAY ILLUMINATES

FROST PROTECTION

Next: End

OBSERVATION DISPLAY ILLUMINATES - FIRING NO DEMAND

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

OBSERVATION DISPLAY ILLUMINATES - FIRING NO DEMAND

SENSOR - EDGE CONNECTION - WATER FLOW

Next: End

BOILER COOL RADS COOL

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

70 DEG FLASHING - NOT SWITCHING

SWITCH - PRESSURE - AIR

Next: End

70 DEG FLASHING - DIFFERENTIAL OK

AIR PRESSURE SWITCH TUBE

Next: End

70 DEG FLASHING - DIFFERENTIAL LOW

AIR PRESSURE SWITCH TUBE

Next: End

70 DEG FLASHING

HEAT EXCHANGER (FLUEWAYS)

Next: End

30 DEG FLASHING

SENSOR - NTC - SURFACE MOUNTED (PRIMARY)

Next: End

70 DEG FLASHING

FLUE

Next: End

70 DEG FLASHING - RUNNING SLOW

FAN

Next: End

70 DEG FLASHING

DIAPHRAGM (RESTRICTOR)

Next: End

30 DEG FLASHING

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

CONDENSATE TRAP

Next: End

OBSERVATION DISPLAY ILLUMINATES - NO LIGHTS

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION DISPLAY ILLUMINATES

CABLE - MAIN BOARD TO INTERFACE BOARD

Next: End

80 DEG FLASHING

Next: End

FUSE INVESTIGATION

TIMER - PROGRAMME

Next: End

INFORMATION DIP SWITCHES

Z REDIRECT

Next: End

80 DEG FLASHINGOBSERVATION PUMP RUNS DHW DEMAND

PUMP ASSEMBLY

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

PCB - INTERFACE

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND

PCB - INTERFACE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - LOW PRESSURE

HARNESS - WIRING C/W BASIC TIMER

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM - MINIMUM WRONG

Z REDIRECT

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM

HARNESS - WIRING C/W BASIC TIMER

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM

GAS VALVE (ADJUSTMENT)

Next: End

OBSERVATION DHW FLOW RATE

HEAT EXCHANGER - PLATE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - BAFFLES

FAN (CHECK CONDENSING HEAT EXCHANGER)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - LOW PRESSURE

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - LOW PRESSURE

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - LOW PRESSURE

INJECTOR

Next: End

PRESSURE BURNER MAXIMUM AND MINIMUM

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION DHW MODULATION

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION CH MODULATION

PCB - MAIN - SIT VALVE

Next: End

OPERATION DHW - DHW TOO HOT

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

PUMP ASSEMBLY

Next: End

70 DEG FLASHING - IGNORING APS

PCB - MAIN - SIT VALVE

Next: End

70 DEG FLASHING - NOT RUNNING

FAN

Next: End

FUSE INVESTIGATION F1 F2

Z REDIRECT

Next: End

70 DEG FLASHING - STUCK IN FAULT

PCB - MAIN - SIT VALVE

Next: End

70 DEG FLASHING - APS SHORT

HARNESS - WIRING C/W BASIC TIMER

Next: End

50 DEG FLASHING

Z REDIRECT

Next: End

OBSERVATION PUMP RUNS DHW DEMAND

SENSOR - EDGE CONNECTION - WATER FLOW

Next: End

OBSERVATION FAN RUNS DHW DEMAND - APS SHORT

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION FAN RUNS DHW DEMAND

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION FAN RUNS DHW DEMAND

FAN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO SPARKING

IGNITION ELECTRODE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - NO PRESSURE

GAS VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - NO PRESSURE

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - NO PRESSURE

PCB - MAIN - SIT VALVE AND HARNESS - WIRING

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - LOW PRESSURE

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION

INJECTOR

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

SENSOR - CONDENSATE

Next: End

OBSERVATION DISPLAY ILLUMINATES

Next: End

FUSE INVESTIGATION MAINS

Z REDIRECT

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - BAFFLES

FAN (CHECK CONDENSING HEAT EXCHANGER)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH - RECTIFICATION

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION PUMP RUNS DHW DEMAND - IGNORING DEMAND

PCB - MAIN - SIT VALVE

Next: End

OPERATION DHW - DHW COOL RADS WARM

3 WAY VALVE SERVICE KIT

Next: End

OPERATION DHW - DHW COOL RADS WARM

MOTOR - 3 - WAY VALVE

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER - PLATE

Next: End

FUSE INVESTIGATION - GAS VALVE

HARNESS - WIRING C/W BASIC TIMER

Next: End

OPERATION DHW - DHW COOL RADS COOL

MANOMETER - WATER PRESSURE GAUGE

Next: End

DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

DHW COOL RADS COOL

PCB - MAIN - SIT VALVE

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER (WATERWAYS)

Next: End

OPERATION CH - EXCESSIVE SYSTEM PRESSURE RISE

HOSE - FLEXIBLE - EXPANSION VESSEL

Next: End

FUSE INVESTIGATION - DIVERTER

HARNESS - WIRING C/W BASIC TIMER

Next: End

OPERATION DHW - DHW RUNS HOT COLD

MANOMETER - WATER PRESSURE GAUGE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

SYSTEM PRESSURE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

PCB - MAIN - SIT VALVE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER - PLATE

Next: End

OPERATION DHW - DHW RUNS HOT COLD

HEAT EXCHANGER (WATERWAYS)

Next: End

80 DEG FLASHING - SAFETY CIRCUIT

HARNESS - WIRING C/W BASIC TIMER

Next: End

FUSE INVESTIGATION - FAN

HARNESS - WIRING C/W BASIC TIMER

Next: End

80 DEG FLASHING

MANOMETER - WATER PRESSURE GAUGE

Next: End

80 DEG FLASHING

SYSTEM PRESSURE

Next: End

FAULT CODE 1

Z REDIRECT

Next: End

80 DEG FLASHING

HEAT EXCHANGER - PLATE

Next: End

80 DEG FLASHING

HEAT EXCHANGER (WATERWAYS)

Next: End

80 DEG FLASHING - TRIPPING EARLY

THERMOSTAT 130DEG C - SAFETY (OVERHEAT)

Next: End

80 DEG FLASHING

OVERHEAT - SHUTS DOWN AT TEMP

Next: End

80 DEG FLASHING - NOT SHUTTING DOWN

PCB - MAIN - SIT VALVE

Next: End

60 DEG FLASHING

Z REDIRECT

Next: End

60 DEG FLASHING

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - LOW VOLTAGE

Next: End

60 DEG FLASHING

MANOMETER - WATER PRESSURE GAUGE

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - LOW VOLTAGE - TIMER

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - LOW VOLTAGE

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - MAINS VOLTAGE

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - MAINS VOLTAGE - TIMER

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - MAINS VOLTAGE

PCB - MAIN - SIT VALVE

Next: End

60 DEG FLASHING

SYSTEM PRESSURE

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - INTERNAL ONLY - TIMER

HARNESS - WIRING C/W BASIC TIMER

Next: End

OBSERVATION BOILER RESPONDS TO CH DEMAND - INTERNAL ONLY

PCB - MAIN - SIT VALVE

Next: End

BOILER TO TEMP RADS DO NOT HEAT

MOTOR - 3 - WAY VALVE

Next: End

40 DEG FLASHING

Z REDIRECT

Next: End

BOILER TO TEMP RADS DO NOT HEAT

HYDROBLOCK - FLOW W/O FILLING VALVE

Next: End

BOILER TO TEMP RADS DO NOT HEAT

Next: End

OPERATION CH - BOILER UP TO TEMP RADS COLD

MANOMETER - WATER PRESSURE GAUGE

Next: End

OPERATION CH - BOILER UP TO TEMP RADS COLD

SYSTEM PRESSURE

Next: End

40 DEG FLASHING

THERMISTOR - IMMERSION TYPE - NTC (DHW)

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - NO IGNITION - NO PRESSURE

HARNESS - WIRING C/W BASIC TIMER

Next: End

80 DEG FLASHING

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES - FIRING NO DEMAND - DHW

PCB - MAIN - SIT VALVE

Next: End

OBSERVATION DISPLAY ILLUMINATES - FIRING NO DEMAND

OPEN TAP OR LEAK

Next: End

OPERATION CH - BOILER AND RADS COOL

PCB - MAIN - SIT VALVE (CH OUTPUT)

Next: End

30 DEG FLASHING

HARNESS - WIRING C/W BASIC TIMER

Next: End

70 DEG FLASHING - APS - OPEN

HARNESS - WIRING C/W BASIC TIMER

Next: End

70 DEG FLASHING

FAN (CHECK CONDENSING HEAT EXCHANGER)

Next: End

30 DEG FLASHING

Z REDIRECT

Next: End

OBSERVATION DISPLAY ILLUMINATES - NO LIGHTS

PCB - INTERFACE

Next: End

OBSERVATION DISPLAY ILLUMINATES - FIRING NO DEMAND

HEATING CONTROLS STUCK ON

Next: End

FUSE INVESTIGATION

NO FAULT FOUND - FUSE INVESTIGATION

Next: End

FUSE INVESTIGATION - TIMER

HARNESS - WIRING C/W BASIC TIMER

Next: End

BOILER ATTEMPTS TO FIRE WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY OPERATES AND SELF CHECK

Next: p11

MAXIMUM PRESSURE INCORRECT

CHARACTERISTIC TEST FROM PRESSURE GAS VALVE MAXIMUM AND MINIMUM

Next: p1045

MINIMUM PRESSURE INCORRECT

CHARACTERISTIC TEST FROM PRESSURE GAS VALVE MAXIMUM AND MINIMUM

Next: p1044

NO SPARKING, BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p180

SPARKING PRESENT BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p182

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p184

BURNER IGNITES BUT BAFFLES AND / OR FLAME LIFTS OFF

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1113

LOW PRESSURE ON IGNITION

CHARACTERISTIC TEST FROM PRESSURE GAS VALVE - IGNITION

Next: p191

ZERO PRESSURE ON IGNITION

CHARACTERISTIC TEST FROM PRESSURE GAS VALVE - IGNITION

Next: p193

BURNER NOT CROSS LIGHTING

CHARACTERISTIC TEST FROM OBSERVATION BURNER

Next: p1177

BURNER BAFFLES AND / OR LIFTS OFF

CHARACTERISTIC TEST FROM OBSERVATION BURNER

Next: p225

DHW COOL, RADIATORS HEAT WITH NO DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p301

DHW COOL, RADIATORS COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p311

FAULT CODE SHOWING

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY OPERATES AND SELF CHECK

Next: p5

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p436

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p438

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p472

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p476

DHW RUNS HOT THEN COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p488

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p491

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p493

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p591

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p593

BOILER GOES TO OVERHEAT - TEMPERATURE BELOW 82°C

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER TO MAX TEMP

Next: p629

FLOW TEMPERATURE EXCEEDS 88°C AND BOILER STILL FIRING

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER TO MAX TEMP

Next: !p636

BOILER AND RADIATOR TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p680

SYSTEM PRESSURE OK BUT DOES NOT INCREASE WHEN WATER ADDED

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF CONTROLS

Next: !p74

MAINS VOLTAGE EXTERNAL CONTROLS AND TIMER FITTED

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF CONTROLS

Next: p735

LOW VOLTAGE EXTERNAL CONTROLS AND TIMER FITTED

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF CONTROLS

Next: p737

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p76

BOILER REACHES TEMPERATURE RADIATORS DO NOT HEAT SUFFICIENTLY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p785

NO LIGHTS ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY OPERATES AND SELF CHECK

Next: p9

PRESSURE DOES NOT INCREASE WHEN WATER ADDED TO SYSTEM

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p809

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p811

06/12/2018 11:11:13 1811_1_50_1 22/01/2019 14:16:06

10/12/2018 09:55:27

Next: End

VOLTAGE PUMP AT PCB

{GAINPCBACS}
FLOW RATE SET TO 3 LITRES/MIN

Next: !p1014, !f1027

INSPECTION SELECTOR SWITCH

Next: !p1030, !f1031

INSPECTION SELECTOR SWITCH

Next: !p1033, !f1034

OBSERVATION WATER SUPPLY

Next: p108, !f107

RESISTANCE GAS VALVE MODUREG

REMOVE MODUREG LEADS FROM GAS VALVE

Next: !p1075, !f1076

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: p1090, !f1091

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p1169, !f1170

RESISTANCE GAS VALVE MODUREG

REMOVE MODUREG LEADS FROM GAS VALVE

Next: !p1175, !f1176

VOLTAGE PUMP AT PCB

{GAINPCBACS}
FLOW RATE SET TO 3 LITRES/MIN

Next: !p124, f125

VOLTAGE DHW FLOW TURBINE - DEMAND

{GAINPCBACS}
FLOW RATE SET TO 3 LITRES/MIN

Next: p291, f146

OBSERVATION FAN RUNS DHW DEMAND

DHW TEMPERATURE SET TO MAX
ENSURE BOILER IS COOL

Next: p848, f128

VOLTAGE FAN AT PCB

{GAINPCBACS}

Next: p130, f129

RESISTANCE APS AT PCB (OPEN CIRCUIT)

REMOVE CONNECTOR X16 FROM THE PCB

Next: !p140, f139

FUSE FURTHER INVESTIGATION

Next: !p14, !f15

RESISTANCE APS AT APS (OPEN CIRCUIT)

REMOVE TUBES FROM APS NOTING THEIR CONNECTIONS

Next: !p141, !f142

VOLTAGE DHW FLOW TURBINE - PERMANENT

Next: p147, !f148

RESISTANCE APS AT PCB (OPEN CIRCUIT)

REMOVE CONNECTOR X16 FROM THE PCB

Next: p160, f157

RESISTANCE APS AT APS (OPEN CIRCUIT)

REMOVE TUBES FROM APS NOTING THEIR CONNECTIONS

Next: !p158, !f159

VOLTAGE FAN AT PCB

{GAINPCBACS}

Next: p175, f155

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X17 FROM THE PCB

Next: !p200, f201

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p202, !f203

RESISTANCE GAS VALVE MODUREG

REMOVE MODUREG LEADS FROM GAS VALVE

Next: !p1035, !f1036

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: !p22, f23

INSPECTION CONDENSATE

Next: !p215, !f911

FUSE FURTHER INVESTIGATION

Next: !p24, !f25

VOLTAGE DIVERTER AT PCB - DHW

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM THE DIVERTER VALVE ACTUATOR
AND MAKE SAFE

Next: p305, !f304

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET TO MAX
ATTACH TEMPERATURE CLAMP TO FLOW PIPE OF THE PRIMARY HEAT EXCHANGER

Next: !p330, f468

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR X12 FROM THE PCB

Next: p40, !f37

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p42, !f43

INSPECTION CONDENSING HEAT EXCHANGER WATERWAYS

DRAIN BOILERS PRIMARY SYSTEM
REMOVE RIGHT HAND SIDE PANEL

Next: !p469, !f510

RESISTANCE DIVERTER VALVE

REMOVE DIVERTER VALVE ACTUATOR AND DISCONNECT ELECTRICAL CONNECTOR

Next: !p49, !f50

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET TO MAX
ATTACH TEMPERATURE CLAMP TO FLOW PIPE OF THE PRIMARY HEAT EXCHANGER

Next: !p506, f507

INSPECTION CONDENSING HEAT EXCHANGER WATERWAYS

DRAIN BOILERS PRIMARY SYSTEM
REMOVE RIGHT HAND SIDE PANEL

Next: !p508, !f511

INSPECTION DHW SPINDLE

Next: p513, !f514

RESISTANCE FAN

DISCONNECT FAN LEADS

Next: !p53, !f54

RESISTANCE OVERHEAT STAT

REMOVE RIGHT HAND SIDE PANEL
REMOVE LEADS FROM HEAT EXCHANGER OVERHEAT STAT

Next: p521, !f524

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET TO MAX
ATTACH TEMPERATURE CLAMP TO FLOW PIPE OF THE PRIMARY HEAT EXCHANGER

Next: !p620, f621

INSPECTION CONDENSING HEAT EXCHANGER WATERWAYS

DRAIN BOILERS PRIMARY SYSTEM
REMOVE RIGHT HAND SIDE PANEL

Next: !p622, !f623

RESISTANCE SAFETY CIRCUIT

REMOVE CONNECTOR X9 FROM THE PCB

Next: p519, f812

INSPECTION CH SPINDLE

Next: p639, !f645

OBSERVATION SYSTEM PRESSURE

Next: p65, ?73, ?75

RESISTANCE WATER PRESSURE SWITCH

DISCONNECT LEADS TO THE LOW WATER PRESSURE SWITCH
(MAKE A NOTE OF THEIR CONNECTIONS)

Next: !p70, !f71

RESISTANCE SELECTOR SWITCH POTENTIOMETER

DISCONNECT X1 (RIBBO

Next: p732, f1032

OBSERVATION CONNECTOR X20 FITTED

Next: p740, !f741

RESISTANCE SWITCH TIMER PROGRAMMER

ENSURE CH DEMAND IS SELECTED ON TIMER PROGRAMMER
REMOVE LEADS 4 & 3 FROM THE TIMER PROGRAMMER

Next: !p744, !f745

RESISTANCE TIMER PROGRAMMER AND HARNESS

ENSURE CH DEMAND IS SELECTED ON TIMER PROGRAMMER
REMOVE CONNECTOR X7 FROM THE PCB

Next: p750, f751

RESISTANCE SWITCH TIMER PROGRAMMER

ENSURE CH DEMAND IS SELECTED ON TIMER PROGRAMMER
REMOVE LEADS 4 & 3 FROM THE TIMER PROGRAMMER

Next: !p752, !f753

RESISTANCE SWITCH TIMER PROGRAMMER

ENSURE CH DEMAND IS SELECTED ON TIMER PROGRAMMER
REMOVE LEADS 4 & 3 FROM THE TIMER PROGRAMMER

Next: !p760, !f761

OBSERVATION BOILER RESET

ENSURE NO DEMANDS ARE PRESENT

Next: !p143, !f144

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: p79, f82

VOLTAGE DIVERTER AT PCB - CH

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM THE DIVERTER VALVE ACTUATOR
AND MAKE SAFE

Next: p796, !f797

INSPECTION FILTER RETURN

DRAIN PRIMARY CIRCUIT
REMOVE SYSTEM FILTER FROM RETURN ISOLATION VALVE

Next: !p804, !f823

OBSERVATION HAS OVERHEAT TRIPPED

ENSURE BOILER IS COOL

Next: !p832, f520

RESISTANCE HARNESS DHW THERMISTOR

REMOVE CONNECTOR X9 FROM THE PCB
REMOVE CONNECTOR FROM DHW THERMISTOR

Next: !p821, !f822

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p826, !f827

OBSERVATION DISCONNECT 24V CONTROLS

REMOVE WIRES / LINK

Next: !p961, !f835

RESISTANCE PRIMARY THERMISTOR

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p841, !f842

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p89, f86

RESISTANCE PRIMARY THERMISTOR

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p87, !f88

PRESSURE DIFFERENTIAL APS

ENSURE COMBUSTION CO

Next: p865, f873

INSPECTION APS TUBES

Next: p876, !f874

RESISTANCE TIMER

Next: !p967, !f966

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p1058, !f1059

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p1062, !f1047

ADJUSTMENT PRESSURE MIN

DISCONNECT ONE LEAD

Next: !p1060, !f1061

RESISTANCE GAS VALVE MODUREG AND HARNESS

REMOVE X9 CONNECTOR FROM THE PCB

Next: p1077, f1074

VOLTAGE GAS VALVE MODUREG

Next: p1100, f1089

INSPECTION DHW ISOLATION VALVE

Next: p109, !f110

INSPECTION FLOW VALVE ASSEMBLY

ISOLATE COLD FEED TO BOILER
DRAIN DHW CIRCUIT
DISASSEMBLE DHW FLOW MANIFOLD

Next: !p111, !f112

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p1092, !f1093

INSPECTION DHW SPINDLE

Next: p1094, !f1095

RESISTANCE DHW POTENTIOMETER

DISCONNECT X1 (RIBBO

Next: p1180, !f1097

OBSERVATION SET BOILER TO DHW ONLY

TURN SELECTOR SWITCH TO DHW ONLY

Next: p836, f833

ADJUSTMENT PRESSURE MAX AND MIN

DISCONNECT ONE LEAD

Next: !p1101, !f1102

INSPECTION INJECTOR

REMOVE BURNER ASSEMBLY

Next: p242, !f1112

INSPECTION BURNER

Next: p1114, !f1115

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p1124, !f1117

INSPECTION FLUE

Next: p1118, !f1119

INSPECTION FAN

REMOVE FAN ASSEMBLY

Next: p1120, !f1121

INSPECTION RESTRICTOR

GAIN ACCESS TO THE OUTLET OF THE FAN ASSEMBLY

Next: !p1122, !f1123

INSPECTION INJECTOR

REMOVE BURNER ASSEMBLY

Next: p1116, !f1132

PRESSURE GAS VALVE - IGNITION

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p220, f1168

PRESSURE GAS VALVE - MINIMUM

REMOVE ONE LEAD FROM

Next: p1171, !f1172

RESISTANCE GAS VALVE MODUREG AND HARNESS

REMOVE X9 CONNECTOR FROM THE PCB

Next: !p1173, f1174

INSPECTION BURNER

Next: !p1178, !f1179

RESISTANCE HARNESS DISPLAY PCB

REMOVE RIBBON CABLE AT THE MAIN PCB

Next: !p1181, !f1182

RESISTANCE HARNESS DISPLAY PCB

REMOVE RIBBON CABLE AT THE MAIN PCB

Next: !p1184, !f1185

RESISTANCE HARNESS DISPLAY PCB

REMOVE RIBBON CABLE AT THE MAIN PCB

Next: !p1187, !f1189

RESISTANCE HARNESS DISPLAY PCB

REMOVE RIBBON CABLE AT THE MAIN PCB

Next: !p1191, !f1192

RESISTANCE FUSES F1 AND F2

REMOVE BOTH FUSES FROM PCB

Next: p931, f13

VOLTAGE FAN AT FAN

Next: !p131, !f132

RESISTANCE HARNESS DHW FLOW TURBINE

REMOVE CONNECTOR X10 FROM THE PCB
REMOVE CONNECTOR FROM THE DHW FLOW SENSOR

Next: p150, !f149

INSPECTION DHW FLOW TURBINE

ISOLATE COLD FEED TO BOILER
DRAIN DHW CIRCUIT
DISASSEMBLE DHW FLOW MANIFOLD

Next: !p151, !f152

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p161, !f162

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: !p163, !f164

VOLTAGE FAN AT FAN

Next: !p176, !f177

OBSERVATION SPARKING AT PCB

{GAINPCBACS}
DISCONNECT SPARK LEADS FROM SPARK GENERATOR ON PCB

Next: !p187, !f188

PRESSURE GAS VALVE - IGNITION

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p189, ?190, ?192

DISCONNECT CONDENSATE SENSOR

DISCONNECT RECTIFICA

Next: p1133, f214

INSPECTION BURNER

Next: !p212, !f213

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p205, !f204

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p194, !f195

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p196, f197

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X17 FROM THE PCB

Next: !p198, f825

PRESSURE GAS VALVE - MINIMUM

REMOVE ONE LEAD FROM

Next: p206, !f207

RESISTANCE GAS VALVE MODUREG AND HARNESS

REMOVE X9 CONNECTOR FROM THE PCB

Next: !p208, f209

OBSERVATION BURNER

Next: p221, ?222, ?224

INSPECTION DETECTION ELECTRODE

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p249, !f250

INSPECTION BURNER

Next: p240, !f239

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p1104, !f241

INSPECTION FLUE

Next: p243, !f244

INSPECTION FAN

REMOVE FAN ASSEMBLY

Next: p245, !f246

INSPECTION RESTRICTOR

GAIN ACCESS TO THE OUTLET OF THE FAN ASSEMBLY

Next: !p247, !f248

RESISTANCE DETECTION ELECTRODE AND LEAD

REMOVE CONNECTOR X2 (DETECTION ELECTRODE LEAD) FROM THE PCB

Next: !p251, !f252

RESISTANCE SELECTOR SWITCH POTENTIOMETER

DISCONNECT X1 (RIBBO

Next: !p292, f1029

OBSERVATION DIVERTER VALVE ACTUATOR - DHW

REMOVE DIVERTER VALV

Next: !p302, f303

RESISTANCE HARNESS DIVERTER VALVE

REMOVE ELECTRICAL CONNECTOR FROM THE DIVERTER VALVE ACTUATOR AND CONNECTOR X19 FROM THE PCB

Next: !p306, !f307

OBSERVATION SYSTEM PRESSURE

Next: p373, ?435, ?437

RESISTANCE DHW POTENTIOMETER

DISCONNECT X1 (RIBBO

Next: p314, !f460

PUMP LIMPET

Next: p322, !f323

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: p324, !f325

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p326, !f327

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - DHW

DHW TEMPERATURE SET TO MAX
ATTACH TEMPERATURE CLAMP TO FLOW PIPE OF THE PRIMARY HEAT EXCHANGER

Next: p463, f329

INSPECTION DHW SPINDLE

Next: p312, !f433

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X17 FROM THE PCB

Next: p44, f41

INSPECTION DIVERTER VALVE

REMOVE DIVERTER VALV

Next: p968, !f45

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE CONNECTOR X19 FROM THE PCB

Next: p47, f48

INSPECTION BURNER

Next: p464, !f465

INSPECTION INJECTOR

REMOVE BURNER ASSEMBLY

Next: !p466, !f467

RESISTANCE FAN AND HARNESS

REMOVE CONNECTOR X12 FROM THE PCB

Next: p962, f52

PRESSURE EXPANSION VESSEL

DISCHARGE PRIMARY SYSTEM WATER

Next: !p473, !f474

INSPECTION DHW SPINDLE

Next: p481, !f477

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: p1190, !f480

RESISTANCE DHW POTENTIOMETER

DISCONNECT X1 (RIBBO

Next: p478, !f485

OBSERVATION SYSTEM PRESSURE

Next: p489, ?490, ?492

INSPECTION DHW SPINDLE

Next: p494, !f495

RESISTANCE DHW POTENTIOMETER

DISCONNECT X1 (RIBBO

Next: p496, !f497

PUMP LIMPET

Next: p498, !f499

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: p500, !f501

FAULT CODES

Next: !p6, !f7

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p502, !f503

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - DHW

DHW TEMPERATURE SET TO MAX
ATTACH TEMPERATURE CLAMP TO FLOW PIPE OF THE PRIMARY HEAT EXCHANGER

Next: !p504, f505

RESISTANCE DHW POTENTIOMETER

DISCONNECT X1 (RIBBO

Next: p515, !f516

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: p1183, !f518

OBSERVATION BOILER RESET (OVERHEAT)

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p588, !f525

RESISTANCE LIMIT STAT

REMOVE CONNECTORS FROM THE FLOW PIPE OVERHEAT STAT

Next: !p522, !f523

OBSERVATION SYSTEM PRESSURE

Next: p985, ?590, ?592

PUMP LIMPET

Next: p936, !f613

RESISTANCE DHW THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM PCB

Next: p614, !f615

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p616, !f617

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - DHW

DHW TEMPERATURE SET TO MAX
ATTACH TEMPERATURE CLAMP TO FLOW PIPE OF THE PRIMARY HEAT EXCHANGER

Next: p624, f619

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET TO MAX
ATTACH TEMPERATURE CLAMP TO FLOW PIPE OF THE PRIMARY HEAT EXCHANGER

Next: p626, !f625

OBSERVATION RUN BOILER TO MAX TEMP

ATTACH TEMPERATURE C

Next: p627, ?628, ?630

OBSERVATION PUMP OVERRUN

ENSURE NO DEMANDS ARE PRESENT

Next: !p634, !f635

RESISTANCE LIMIT STAT

REMOVE CONNECTORS FROM THE FLOW PIPE OVERHEAT STAT

Next: !p632, !f633

RESISTANCE CH POTENTIOMETER

GAIN ACCESS TO BACK

Next: p641, !f642

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: p1186, !f644

RESISTANCE WATER PRESSURE SWITCH AND HARNESS

REMOVE CONNECTOR X16 FROM THE PCB

Next: p66, f69

OBSERVATION BOILER RESET

ENSURE NO DEMANDS ARE PRESENT

Next: !p67, !f68

OBSERVATION PCB DIP SWITCHES

Next: p765, !f682

RESISTANCE CH POTENTIOMETER

GAIN ACCESS TO BACK

Next: p683, !f783

RESISTANCE PRIMARY THERMISTOR AND HARNESS

REMOVE CONNECTOR X9 FROM THE PCB

Next: !p846, !f847

OBSERVATION TYPE OF CONTROLS

Next: p733, ?734, ?736

OBSERVATION CONNECTOR X20 FITTED

Next: p756, !f757

BYPASS MAINS VOLTAGE CONTROLS

{GAINPCBACS}
DISC

Next: !p748, f749

BYPASS LOW VOLTAGE CONTROLS

DISCONNECT LOW VOLTA

Next: !p738, f739

RESISTANCE TIMER PROGRAMMER AND HARNESS

ENSURE CH DEMAND IS SELECTED ON TIMER PROGRAMMER
REMOVE CONNECTOR X7 FROM THE PCB

Next: p742, f743

RESISTANCE EXTERNAL CONTROL HARNESS

REMOVE CONNECTOR X7 FROM THE PCB
ENSURE EXTERNAL CONTROLS (WIRE LINK) ARE STILL LINKED OUT

Next: !p746, !f747

RESISTANCE EXTERNAL CONTROL HARNESS

REMOVE CONNECTOR X7 FROM THE PCB
ENSURE EXTERNAL CONTROLS (WIRE LINK) ARE STILL LINKED OUT

Next: !p754, !f755

RESISTANCE TIMER PROGRAMMER AND HARNESS

ENSURE CH DEMAND IS SELECTED ON TIMER PROGRAMMER
REMOVE CONNECTOR X7 FROM THE PCB

Next: p758, f759

RESISTANCE EXTERNAL CONTROL HARNESS

REMOVE CONNECTOR X7 FROM THE PCB
ENSURE EXTERNAL CONTROLS (WIRE LINK) ARE STILL LINKED OUT

Next: !p762, !f763

INSPECTION CH SPINDLE

Next: p681, !f782

OBSERVATION SYSTEM PRESSURE

Next: p786, ?808, ?810

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p788, !f789

INSPECTION EXTERNAL BYPASS

Next: p790, !f791

OBSERVATION BOILER RESET

ENSURE NO DEMANDS ARE PRESENT

Next: !p80, !f81

PUMP LIMPET

Next: p792, !f793

OBSERVATION DIVERTER VALVE ACTUATOR - CH

REMOVE DIVERTER VALV

Next: p794, f795

INSPECTION DIVERTER VALVE SPINDLE

REMOVE DIVERTER VALVE ACTUATOR MOTOR

Next: p800, !f801

RESISTANCE HARNESS DIVERTER VALVE

REMOVE ELECTRICAL CONNECTOR FROM THE DIVERTER VALVE ACTUATOR AND CONNECTOR X19 FROM THE PCB

Next: !p798, !f799

TEMPERATURE DIFFERENTIAL - INTERNAL BYPASS

ENSURE RADIATORS ARE

Next: p802, f803

INSPECTION FILTER RETURN

DRAIN PRIMARY CIRCUIT
REMOVE SYSTEM FILTER FROM RETURN ISOLATION VALVE

Next: !p806, !f824

TEMPERATURE AMBIENT

Next: p837, !f838

OBSERVATION DISCONNECT FLOW SENSOR

REMOVE ELECTRICAL CONNECTOR TO DHW FLOW SENSOR AND MAKE SAFE

Next: p839, f840

OBSERVATION ISOLATE DHW

ISOLATE DHW COLD FEED TO BOILER

Next: !p843, !f844

VOLTAGE SWITCH AIR PRESSURE

{GAINPCBACS}
SELECTOR SWITCH SET TO OFF POSITION

Next: !p127, f864

INSPECTION APS TUBES

Next: p869, !f872

RESISTANCE APS AT APS WITH KIT

REMOVE TUBES FROM APS NOTING THEIR CONNECTIONS
REMOVE APS FROM BOILER (TOP / REAR OF APPLIANCE)

Next: !p870, !f871

INSPECTION FAN

REMOVE FAN ASSEMBLY

Next: p877, !f886

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p878, !f879

INSPECTION FLUE

Next: p888, !f881

INSPECTION RESTRICTOR

GAIN ACCESS TO THE OUTLET OF THE FAN ASSEMBLY

Next: !p889, !f890

OBSERVATION BOILER RESET

ENSURE NO DEMANDS ARE PRESENT

Next: !p90, !f91

VOLTAGE MAINS IN AT PCB

{GAINPCBACS}

Next: p12, f21

VOLTAGE MAIN PCB TO DISPLAY PCB

DISCONNECT X1 FROM THE PCB

Next: p932, !f933

RESISTANCE HARNESS DISPLAY PCB

REMOVE RIBBON CABLE AT THE MAIN PCB

Next: !p934, !f935

INSPECTION EXTERNAL BYPASS

Next: p612, !f960

RESISTANCE TIMER AND HARNESS

Next: !p963, f964

INSPECTION FLOW TURBINE SENSOR

REMOVE ELECTRICAL CONNECTOR TO DHW FLOW SENSOR

Next: p46, !f1028

OBSERVATION PUMP RUNS (OVERHEAT INVESTIGATION)

Next: p611, f1013

System Information

  • Total Tests: 507
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control