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 LINEA 730 LPG

GLOBALLY REPLACED

Next: &1891, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

DHW BURNER ESTABLISHED

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: &1020, ?196, ?198, ?200

DHW FAN RUNS

{ISOLATEMAINSPOWER}
HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: &1390, f22

DHW FLOW RATE

Next: &86, f19

DHW MODULATION

{ISOLATEMAINSPOWER}<

Next: &12, f244

DHW BURNER IGNITION

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: &3, ?158, ?160

CH DEMAND

{ISOLATEMAINSPOWER}<

Next: &13, ?248, ?346

CH OPERATION

CENTRAL HEATING TEMPERATURE CONTROL SET TO MAXIMUM

Next: &14, ?302, ?308, ?318

SYSTEM PRESSURE RISE

CENTRAL HEATING TEMPERATURE CONTROL SET TO MAXIMUM

Next: &329, f1844

PUMP OVERRUNS

CENTRAL HEATING TEMPERATURE CONTROL SET TO MAXIMUM

Next: &1588, !f334

FACIA DISPLAY

Next: &5, f94

CH MODULATION

{ISOLATEMAINSPOWER}<

Next: &330, f331

RE-IGNITION DELAY

CENTRAL HEATING TEMPERATURE CONTROL SET TO MAXIMUM

Next: &15, !f375

DHW OPERATION

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: &9, ?573, ?575, ?577, ?731, ?735, ?772, ?2069

DHW BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: &1847, !f1021

SETTING UP BURNER PRESSURE

Next: &nff, !f1023

FUSE FURTHER INVESTIGATION (DUMMY)

OUTSIDE MODEL

Next: &nff, f1818

FAULT 01 PASS = SPARK NO IGNITION | FAIL = NO SPARK | IF IGNITES RETURN TO MAIN TREE BURNER ESTABLISH

OUTSIDE MODEL

Next: &nff, f1279

FAULT 02 - OVERHEAT

OUTSIDE MODEL

Next: &nff, f1307

FAULT 03 - FAN FAULT

OUTSIDE MODEL

Next: &nff, f1309

FAULT 04 - LOW SYSTEM PRESSURE

OUTSIDE MODEL

Next: &nff, f1324

FAULT 06 - DHW SENSOR

OUTSIDE MODEL

Next: &nff, f1314

FAULT 07 - PRIMARY SENSOR

OUTSIDE MODEL

Next: &nff, f1313

OBSERVATION PUMP RUNS

{ISOLATEMAINSPOWER}
HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: &10, f1392

DHW PREHEAT

{ISOLATEMAINSPOWER}<

Next: &nff, !f1589

FAULT CODES

Next: &nff, !f1778

DISABLE PREHEAT FUNCTION

{ISOLATEMAINSPOWER}<

Next: &8, !f1797

FAULT 08 - BURNER THERMOSTAT

OUTSIDE MODEL

Next: &nff, f1893

FAULT CO - COMBUSTION SETTING

OUTSIDE MODEL

Next: &nff, f1815

OBSERVATION DOES DHW DEMAND END ?

DHW TEMPERATURE CONTROL ON MAX

Next: &572, f1848

INFORMATION CASE REMOVAL

{ISOLATEMAINSPOWER}<

Next: &1796, !f1892

FAULT 05 - REMOTE CONTROL FAULT

Next: &nff, f2013

FAULT 09 - ONLY APPLICABLE TO PLUS AG (PCB FAULT OTHERWISE)

Next: &nff, !f2017

UNABLE TO SET PREHEAT

VALVE - GAS

Next: End

NO PATH

REDIRECTS

Next: End

BOILER REACHES TEMPERATURE DHW COLD

VALVE - NON RETURN

Next: End

BOILER FIRES BUT SHUTS DOWN AFTER A SHORT WHILE DHW OPERATION

SENSOR - NTC

Next: End

BOILER FIRES BUT SHUTS DOWN AFTER ASHORT WHILE DHW OPERATION

VALVE - NON RETURN

Next: End

NO IGNITION

HARNESS - WIRING - GAS VALVE

Next: End

SPARKING PRESENT PREHEAT ON

SOLENOID - GAS VALVE

Next: End

MODULATING SOLENOID RESISTANCE PREHEAT

VALVE - GAS

Next: End

FACIA DISPLAY

FUSE MAINS

Next: End

FAULT 01

INLET PRESSURE

Next: End

DHW FAN RUNS

TUBE - SILICONE

Next: End

FAULT 01 SPARKING PRESENT

PCB - MAIN

Next: End

FAULT 01

HARNESS - WIRING - GAS VALVE

Next: End

FAULT 01

SOLENOID - GAS VALVE

Next: End

FAULT 01 SPARKING PRESENT

SPARK ELECTRODE - POSITION

Next: End

FAULT 01 NO SPARKING

PCB - MAIN

Next: End

FAULT 01 NO SPARKING

SPARK ELECTRODE - POSITION

Next: End

FAULT 01

SPARK ELECTRODE & LEAD

Next: End

DHW FAN RUNS

CONNECTOR - FAN TO FLUE (VENTURI)

Next: End

FAULT 07

PCB - MAIN

Next: End

FAULT 06

PCB - MAIN

Next: End

OBSERVATION PUMP RUNS

PCB - MAIN

Next: End

DHW FAN RUNS

ACTUATOR - DHW

Next: End

DHW PREHEAT

PCB - MAIN - DHW PREHEAT

Next: End

FAULT 03 - SHORTING APS

TUBE - SILICONE

Next: End

FAULT 03 - SHORTING APS

CONNECTOR - FAN TO FLUE (VENTURI)

Next: End

FAULT 03 - SHORTING APS

FLUE

Next: End

FAULT 02 - STUCK OPEN

THERMOSTAT - HIGH LIMIT

Next: End

FAULT 02 - NO POWER TO PUMP

PCB - MAIN

Next: End

FAULT 02 - RUNNING SLOW

PUMP

Next: End

FAULT 02

VALVE - GAS

Next: End

FAULT 02

SENSOR NTC

Next: End

FAULT 02

SENSOR - NTC

Next: End

FAULT 02

VALVE - NON RETURN

Next: End

FAULT 02

VALVE - BYPASS - AUTO

Next: End

DHW COOL RADS COOL

PCB - MAIN AND SPARK ELECTRODE

Next: End

DHW COOL RADS COOL

KNOB - TEMPERATURE CONTROL

Next: End

CH INSUFFICIENT HEAT

KNOB - TEMPERATURE CONTROL

Next: End

DHW NOISY

PUMP

Next: End

DHW OPERATION

VALVE - BYPASS - AUTO

Next: End

DHW UP TO TEMP DHW COLD

PUMP

Next: End

BOILER FIRES BUT SHUTS DOWN AFTER A SHORT WHILE DHW OPEATION

SENSOR NTC

Next: End

DHW FAN RUNS

FLUE

Next: End

BOILER FIRES BUT SHUTS DOWN AFTER A SHORT WHILE DHW OPERATION

THERMOSTAT - HIGH LIMIT

Next: End

DHW FIRES BUT SHUTS DOWN

HEAT EXCHANGER - MAIN

Next: End

BOILER FIRES BUT SHUTS DOWN AFTER A SHORT WHILE DHW OPERATION

PCB - MAIN

Next: End

DHW FIRES THEN CYCLES ON OFF

PUMP

Next: End

FAULT CODES

Z REDIRECT

Next: End

DHW PUMP RUNS

SENSOR NTC

Next: End

DHW PUMP RUNS

SENSOR - NTC

Next: End

FAULT 06

SENSOR - NTC

Next: End

FAULT 07

SENSOR NTC

Next: End

PREHEAT FUNCTION

Z REDIRECT

Next: End

FACIA DISPLAY

PACK - 5 OFF FUSES 2A INLINE

Next: End

FACIA DISPLAY

FUSE 100MA

Next: End

FACIA DISPLAY

HARNESS - WIRING

Next: End

FACIA DISPLAY

KNOB - MODE SELECTOR CONTROL

Next: End

FAULT CO

PCB - CONTROL (DISPLAY PCB)

Next: End

FUSE INVESTIGATION

ACTUATOR - DHW - FUSE INV

Next: End

FUSE INVESTIGATION

PUMP

Next: End

FUSE INVESTIGATION

FAN ASSEMBLY

Next: End

FUSE INVESTIGATION

VALVE - GAS

Next: End

FUSE INVESTIGATION

TRANSFORMER - IGNITION

Next: End

FUSE INVESTIGATION

VALVE - MOTORISED - DIVERTER

Next: End

FUSE INVESTIGATION

VALVE - MOTORISED - DIVERTER & BODY

Next: End

SYSTEM PRESSURE RISE

EXPANSION VESSEL

Next: End

STUCK

ACTUATOR - DHW

Next: End

NO HEATING

KNOB - MODE SELECTOR CONTROL

Next: End

NO HEATING 1

PCB - MAIN

Next: End

NO CH

PCB - MAIN

Next: End

NO HEATING

PCB - MAIN

Next: End

NO IGNITION ON CH

PCB - MAIN

Next: End

DHW BURNER IGNITION

INLET PRESSURE

Next: End

INFORMATION CASE REMOVAL

Z REDIRECT

Next: End

SPARKING PRESENT

SPARK ELECTRODE - POSITION

Next: End

FAULT 08

HEAT EXCHANGER - MAIN

Next: End

FAULT 08

FLUE

Next: End

FAULT 08

VALVE - GAS

Next: End

DHW FAN RUNS

SENSOR (BURNER)

Next: End

FAULT 08

SENSOR (BURNER)

Next: End

FAULT 04

SWITCH - PRESSURE

Next: End

DHW FAN RUNSFAULT 04

SWITCH - PRESSURE

Next: End

FAULT 05

PCB - MAIN

Next: End

FAULT 09

PCB - MAIN

Next: End

NO SPARKING - NO VOLTAGE TO APS

PCB - MAIN

Next: End

NO SPARKING - APS

HARNESS - WIRING - PRIMARY

Next: End

NO SPARKING

PCB - MAIN

Next: End

NO SPARKING

SPARK ELECTRODE - POSITION

Next: End

DHW BURNER IGNITION

SPARK ELECTRODE & LEAD

Next: End

FAULT 03 - NOT LETTING APS SWITCH

TUBE - SILICONE

Next: End

FAULT 03 - NOT LETTING APS SWITCH

CONNECTOR - FAN TO FLUE (VENTURI)

Next: End

FAULT 03 - NOT LETTING APS SWITCH

FLUE

Next: End

FAULT 03 - NO VOLTAGE TO APS

PCB - MAIN

Next: End

FAULT 03 - APS

HARNESS - WIRING - PRIMARY

Next: End

HIGH FLAME NO OUTPUT FROM IGNITION BOARD

PCB - MAIN

Next: End

FAULT 08

BURNER - MAIN (MANIFOLD)

Next: End

FUSE INVESTIGATION

SENSOR (BURNER)

Next: End

NO SPARKING - NOT LETTING APS SWITCH

TUBE - SILICONE

Next: End

NO SPARKING - NOT LETTING APS SWITCH

CONNECTOR - FAN TO FLUE (VENTURI)

Next: End

NO SPARKING - NOT LETTING APS SWITCH

FLUE

Next: End

MODULATING RAPIDLY

TUBE - SILICONE

Next: End

MODULATING RAPIDLY

CONNECTOR - FAN TO FLUE (VENTURI)

Next: End

MODULATING RAPIDLY

FLUE

Next: End

MODULATES RAPIDLY

HEAT EXCHANGER - MAIN

Next: End

DHW BURNER ESTABLISHED BURNER IGNITION PRESSURE LOW OR DIES OUT

INLET PRESSURE

Next: End

DHW BURNER ESTABLISHED

HEAT EXCHANGER - MAIN

Next: End

DHW BURNER ESTABLISHED BURNER IGNITES BUT BAFFLES OUT

INLET PRESSURE

Next: End

DHW BURNER ESTABLISH

SPARK ELECTRODE - POSITION

Next: End

DHW BURNER ESTABLISH

SPARK ELECTRODE & LEAD

Next: End

DHW BURNER ESTABLISH

SENSOR NTC

Next: End

DHW MODULATION

SENSOR - NTC

Next: End

CH NOISY DHW OK

PUMP

Next: End

CH MODULATION

SENSOR NTC

Next: End

PUMP OVERRUNS

PCB - MAIN

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

SENSOR NTC

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

MANIFOLD - DISTRIBUTOR - HEATING

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PUMP

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PCB - MAIN

Next: End

CH DEMAND

ACTUATOR - DHW

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PUMP

Next: End

DHW FAN RUNS

THERMOSTAT - HIGH LIMIT

Next: End

DHW FLOW RATE

STOP COCK - WATER SUPPLY

Next: End

SPARKING PRESENT

PCB - MAIN

Next: End

RE-IGNITION DELAY

PCB - MAIN - RE-IGNITION DELAY

Next: End

DHW TEMPERATURE LOW RADIATORS HOT

PCB - MAIN

Next: End

DHW OPERATION

ACTUATOR - DHW

Next: End

DHW FLOW RATE

REGULATOR - FLOW

Next: End

CH OPERATION NO PREHEAT

VALVE - BYPASS - AUTO

Next: End

BOILER REACHES TEMPERATURE DHW COLD

THERMOSTAT - HIGH LIMIT

Next: End

BOILER REACHES TEMPERATURE DHW COLD

SENSOR NTC

Next: End

BOILER REACHES TEMPERATURE DHW COLD

SENSOR - NTC

Next: End

DHW TEMP LOW RADS COLDDHW LOW RADS LOW

SENSOR - NTC

Next: End

DHW OPERATION NO PREHEATDHW LOW RADS LOW

VALVE - NON RETURN

Next: End

BOILER REACHES TEMPERATURE DHW COLD

PCB - MAIN

Next: End

BOILER REACHES TEMPERATURE DHW COLD

HEAT EXCHANGER - HW

Next: End

BOILER FIRES BUT SHUTS DOWN AFTER A SHORT WHILE DHW OPERATION

HEAT EXCHANGER - HW

Next: End

DHW BURNER IGNITION SPARKING PRESENT MECHANICAL

VALVE - GAS

Next: End

FACIA DISPLAY

Next: End

FUSE INVESTIGATION MAINS

Z REDIRECT

Next: End

FAULT 01 SPARKING PRESENT

PCB - IGNITION

Next: End

FAULT 01

VALVE - GAS

Next: End

FAULT 01 DHW BURNER IGNITION

BURNER - MAIN (MANIFOLD)

Next: End

FAULT 01 NO SPARKING

PCB - IGNITION

Next: End

FAULT 01

TRANSFORMER - IGNITION

Next: End

FAULT 07

Z REDIRECT

Next: End

DHW FAN RUNS

KIT - ANALOGUE PRESSURE SWITCH

Next: End

FAULT 06

Z REDIRECT

Next: End

FAULT 04

SYSTEM PRESSURE

Next: End

FAULT 04

PRESSURE GAUGE - QUICK PRIMER

Next: End

OBSERVATION PUMP RUNS

PUMP

Next: End

FAULT 03DHW FAN RUNS

FAN ASSEMBLY

Next: End

FAULT 03 - SHORTED

KIT - ANALOGUE PRESSURE SWITCH

Next: End

FAULT 03 - NO POWER TO FAN

PCB - MAIN

Next: End

FAULT 02 - STUCK IN FAULT

PCB - MAIN

Next: End

FAULT 02 - NOT RUNNING

PUMP

Next: End

FAULT 02

HEAT EXCHANGER - HW

Next: End

FAULT 02

HEAT EXCHANGER - MAIN

Next: End

FAULT 02

OVERHEAT

Next: End

FAULT 02 - NOT SHUTTING DOWN

PCB - MAIN

Next: End

FAULT 02 - TRIPPING EARLY

THERMOSTAT - HIGH LIMIT

Next: End

DHW TEMP LOW RADIATORS COLD

PCB - MAIN

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PCB - MAIN

Next: End

DHW OPERATION

HEAT EXCHANGER - MAIN

Next: End

BOILER FIRES BUT SHUTS DOWN AFTER A SHORT WHILE DHW OPERATION

PCB - IGNITION

Next: End

FAULT 02

SYSTEM PRESSURE

Next: End

FAULT 02

PRESSURE GAUGE - QUICK PRIMER

Next: End

DHW FAN RUNS PRIMARY THERMISTOR

HARNESS - WIRING - PRIMARY

Next: End

DHW FAN RUNS - DHW THERMISTOR

HARNESS - WIRING (M5)

Next: End

FAULT 06

HARNESS - WIRING (M5)

Next: End

FAULT 07

HARNESS - WIRING - PRIMARY

Next: End

FUSE INVESTIGATION F2

Z REDIRECT

Next: End

FACIA DISPLAY

PCB - MAIN

Next: End

FUSE INVESTIGATION F1

Z REDIRECT

Next: End

FACIA DISPLAY

PCB - CONTROL (DISPLAY PCB)

Next: End

FAULT CO

Z REDIRECT

Next: End

BLOCKED OR RESTRICTED

PIPE ASSEMBLY - EXPANSION VESSEL

Next: End

BOILER STAYING ON

PCB - MAIN

Next: End

DEMAND DOES NOT END

HARNESS - WIRING (M5)

Next: End

NO CH

Next: End

NO CH

INTERNAL CLOCK

Next: End

NO HEATING

Next: End

NO HEATING

INTERNAL CLOCK

Next: End

FAULT 08 - STUCK IN FAULT

PCB - MAIN

Next: End

FAULT 08 - TRIPPING EARLY

SENSOR (BURNER)

Next: End

DHW FAN RUNS - BURNER THERMOSTAT

HARNESS - WIRING - PRIMARY

Next: End

FAULT 08

HARNESS - WIRING - PRIMARY

Next: End

FAULT 04 - LWPS

PCB - MAIN

Next: End

DHW FAN RUNS - LWPS

PCB - MAIN

Next: End

FAULT 05

RC05 REMOTE CONTROL

Next: End

NO SPARKING - INCORRECT REST VOLTAGE

KIT - ANALOGUE PRESSURE SWITCH

Next: End

NO SPARKING

PCB - IGNITION

Next: End

DHW BURNER IGNITION

TRANSFORMER - IGNITION

Next: End

FAULT 03 - RUNNING SLOW

FAN ASSEMBLY

Next: End

FAULT 03 - IGNORING APS SWITCHING

PCB - MAIN

Next: End

FAULT 03 - INCORRECT REST VOLTAGE

KIT - ANALOGUE PRESSURE SWITCH

Next: End

FUSE INVESTIGATION

NO FAULT FUSE INVESTIGATION

Next: End

FUSE INVESTIGATION - BURNER SENSOR

HARNESS - WIRING - PRIMARY

Next: End

NO SPARKING - RUNNING SLOW

FAN ASSEMBLY

Next: End

MODULATING RAPIDLY

FAN ASSEMBLY

Next: End

DHW BURNER ESTABLISHED MECHANICAL FAILURE

VALVE - GAS

Next: End

DHW BURNER ESTABLISH

PCB - IGNITION

Next: End

DHW BURNER IGNITION

BURNER - MAIN (MANIFOLD)

Next: End

DHW MODULATION

PCB - CONTROL (DISPLAY PCB)

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

VALVE - MOTORISED - DIVERTER

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

Next: End

CH MODULATION

PCB - CONTROL (DISPLAY PCB)

Next: End

DHW BURNER ESTABLISHED BURNER IGNITES STRAIGHT TO HIGH FLAME

VALVE - GAS

Next: End

DHW BURNER IGNITION

PCB - IGNITION

Next: End

DHW OPERATION

MANIFOLD - DISTRIBUTOR - HEATING

Next: End

DHW OPERATION

VALVE - MOTORISED - DIVERTER

Next: End

DHW OPERATION

HEAT EXCHANGER - HW

Next: End

DHW FLOW RATE

HEAT EXCHANGER - HW

Next: End

CH NOISY DHW OK

Next: End

DHW TOO HOT

VALVE - NON RETURN

Next: End

DHW FAN RUNS

FAN ASSEMBLY

Next: End

MODUREGDHW LOW RADS LOW WITH PREHEAT

VALVE - GAS

Next: End

DHW TEMPERATURE LOW RADIATORS COLD NO PREHEATDHW LOW RADS LOW

HEAT EXCHANGER - HW

Next: End

BAFFLES OUT WITH PREHEAT

FLUE

Next: End

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p1328

PRESSURE GAUGE READS OK BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p1330

Sparking present

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p159

No sparking

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p2018

BOILER CONTINUES FIRING PAST 90°C

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1724

BOILER RETURNS TO FAULT BEFORE REACHING TEMPERATURE

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1727

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p1781

PRESSURE GAUGE READS OK BUT DOES NOT INCREASE

CHARACTERISTIC TEST FROM OBSERVATION SYSTEM PRESSURE

Next: !p1783

Burner ignition pressure low or dies out

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISH

Next: p202

Burner ignites but baffles out

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISH

Next: p211

Burner ignition spark continues, boiler goes to lockout

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISH

Next: p216

BOILER RAPIDLY MODULATES BETWEEN FULL AND LOW

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p2078

No ignition

CHARACTERISTIC TEST FROM CH DEMAND

Next: p1853

Boiler and radiators provide insufficient heat

CHARACTERISTIC TEST FROM CH OPERATION

Next: p303

Boiler to temperature, radiators cold

CHARACTERISTIC TEST FROM CH OPERATION

Next: p309

CH noisy, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION

Next: p319

Burner ignites straight to high flame

CHARACTERISTIC TEST FROM CH DEMAND

Next: p347

DHW noisy operation

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p574

DHW temperature low, radiators cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p702

DHW temperature low, radiators hot

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p578

Initial temperature of DHW excessive

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p732

Boiler reaches temperature, DHW cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1753

BURNER ESTABLISHES FOR A SHORT WHILE THEN CYCLES ON OFF

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1111

28/05/2021 07:05:26 2002_1_50_1 02/06/2021 09:46:11

28/05/2021 11:17:06

Next: End

VOLTAGE TO MAIN PCB

MODE SELECTOR SWITCH TO OFF/RESET POSITION
USE INSULATION MAT AS NECESSARY

Next: p1798, f1254

NON RETURN VALVE

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p1097, !f1095

VOLTAGE APS (FAN SPEED AT REST)

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)
ENSURE NO DEMANDS

Next: p138, f127

RESISTANCE MAINS FUSE

{ISOLATEMAINSPOWER}
REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p1255, f1257

FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p1258, !f1259

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p128, !f129

DHW BURNER IGNITION (FAULT CODE)

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: p1282, f1297

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p1285, !f1286

VOLTAGE TO IGNITION PCB

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM
USE INSULATION MAT AS NECESSARY

Next: !p1289, !f1290

SPARK GENERATOR SUPPLY VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p1298, f1299

VOLTAGE TO IGNITION PCB

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM
USE INSULATION MAT AS NECESSARY

Next: !p1300, !f1301

OBSERVATION BOILER RESET OVERHEAT

ENSURE BOILER IS COOL

Next: p1684, f1680

OBSERVATION DOES FAN RUN BEFORE LOCKOUT

{ISOLATEMAINSPOWER}
HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: p2041, f1593

RESISTANCE PRIMARY THERMISTOR AND HARNESS

{ISOLATEMAINSPOWER}<

Next: p1315, f1791

RESISTANCE DHW THERMISTOR AND HARNESS

{ISOLATEMAINSPOWER}<

Next: p1320, f1790

OBSERVATION SYSTEM PRESSURE

Next: p1989, ?1327, ?1329

VOLTAGE PUMP AT PCB

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: !p1393, !f1394

VOLTAGE TO FAN

{ISOLATEMAINSPOWER}<

Next: !p1594, f1595

VOLTAGE APS (FAN SPEED AT REST)

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)
ENSURE NO DEMANDS

Next: !p1629, f1597

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p1598, !f1599

OVERHEAT THERMOSTAT

{ISOLATEMAINSPOWER}<

Next: !p1681, !f1682

VOLTAGE PUMP AT PCB

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: !p1688, !f1689

CH OPERATION

CENTRAL HEATING TEMPERATURE CONTROL SET TO MAXIMUM

Next: p1716, f1719

BYPASS VALVE

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p1720, !f1721

PUMP LIMPET TEST

Next: p1750, !f1749

PUMP LIMPET TEST

Next: p1767, !f1776

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: !p1785, !f1786

DHW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG CONNECTOR FROM THE DHW THERMISTOR

Next: !p1788, !f1789

DHW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG CONNECTOR FROM THE DHW THERMISTOR

Next: !p1792, !f1793

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: !p1794, !f1795

FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p1801, !f1802

FUSE FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p1805, !f1806

INFORMATION CO FUNCTION

{ISOLATEMAINSPOWER}

Next: !p1816, !f1817

INSPECTION FLOW SWITCH

{ISOLATEMAINSPOWER}
DISCONNECT LEADS FROM FLOW SWITCH

Next: p1828, !f1830

INSPECTION EXPANSION VESSEL

{ISOLATEMAINSPOWER}
APPLIANCE DRAINED AND DISCHARGED

Next: !p1845, !f1846

RESISTANCE DHW FLOW SWITCH AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR M5 FROM THE PCB

Next: !p1849, f1850

RESISTANCE DHW FLOW SWITCH

{ISOLATEMAINSPOWER}
REMOVE BOTH OF THE LEADS FROM THE WATER FLOW SWITCH

Next: !p1851, !f1852

OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p1858, !f1859

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p187, !f188

BYPASS INTERNAL CLOCK (NO EXTERNAL CONTROLS)

{ISOLATEMAINSPOWER}<

Next: !p1864, !f1865

BYPASS INTERNAL CLOCK (EXTERNAL CONTROLS FITTED)

{ISOLATEMAINSPOWER}<

Next: !p1868, !f1869

OBSERVATION BOILER RESET BURNER LOCKOUT

ENSURE BOILER IS COOL

Next: p1902, f1894

RESISTANCE BURNER THERMOSTAT AND HARNESS

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB
DISCONNECT M3 FROM THE PCB

Next: !p1898, f1940

DHW STOPCOCK

{ISOLATEMAINSPOWER}
SET THE DHW STOPCOCK TO FULLY OPEN

Next: p707, !f366

RESISTANCE BURNER THERMOSTAT

{ISOLATEMAINSPOWER}
DISCONNECT WHITE WIRES TO BURNER THERMOSTAT

Next: !p1937, !f1938

RESISTANCE BURNER THERMOSTAT

{ISOLATEMAINSPOWER}
DISCONNECT WHITE WIRES TO BURNER THERMOSTAT

Next: !p1943, !f1944

OBSERVATION DISCONNECT RC05

{ISOLATEMAINSPOWER}<

Next: !p2014, !f2015

VOLTAGE APS (PERMANENT)

Next: p2029, !f2030

VOLTAGE TO IGNITION PCB

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM
USE INSULATION MAT AS NECESSARY

Next: !p2035, !f2036

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p2044, !f2045

VOLTAGE APS (PERMANENT)

Next: p2052, !f2053

RESISTANCE BURNER THERMOSTAT TO EARTH

{ISOLATEMAINSPOWER}
DISCONNECT WHITE WIRES TO BURNER THERMOSTAT

Next: !p2067, !f2068

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p2072, !f2073

VOLTAGE TO FAN

{ISOLATEMAINSPOWER}<

Next: !p85, f119

DHW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG CONNECTOR FROM THE DHW THERMISTOR

Next: !p246, !f247

DIVERTER VALVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p312, !f341

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: !p332, !f333

VOLTAGE TO IGNITION PCB

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM
USE INSULATION MAT AS NECESSARY

Next: !p368, !f369

DIVERTER VALVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p583, !f584

VOLTAGE ON MODUREG

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: !p894, f895

DHW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG CONNECTOR FROM THE DHW THERMISTOR

Next: p1735, !f897

VOLTAGE TO DISPLAY PCB

{ISOLATEMAINSPOWER}<

Next: p1807, f108

DIFFERENTIAL PRIMARY FLOW AND RETURN

{ISOLATEMAINSPOWER}
ATTACH TEMPERATURE CLAMPS TO PRIMARY FLOW AND RETURN AS INDICATED

Next: !p1096, f1093

CH OPERATION

CENTRAL HEATING TEMPERATURE CONTROL SET TO MAXIMUM

Next: p1112, f1766

DHW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG CONNECTOR FROM THE DHW THERMISTOR

Next: p1120, !f1121

NON RETURN VALVE

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p1122, !f1123

GAS VALVE HARNESS CONTINUITY

{ISOLATEMAINSPOWER}<

Next: p1186, !f1166

RESISTANCE GAS VALVE SOLENOID

{ISOLATEMAINSPOWER}
DISCONNECT LEAD FROM GAS VALVE

Next: !p1187, !f1197

VENTURI

{ISOLATEMAINSPOWER}

Next: p130, !f131

IGNITION PRESSURE

{ISOLATEMAINSPOWER}<

Next: p1283, f1284

ELECTRODE POSITION

{ISOLATEMAINSPOWER}

Next: !p1295, !f1296

GAS VALVE VOLTAGE FROM IGNITION PCB

{ISOLATEMAINSPOWER}<

Next: p1287, f1288

GAS VALVE HARNESS CONTINUITY

{ISOLATEMAINSPOWER}<

Next: p1291, !f1292

RESISTANCE GAS VALVE SOLENOID

{ISOLATEMAINSPOWER}
DISCONNECT LEAD FROM GAS VALVE

Next: !p1293, !f1294

ELECTRODE POSITION

{ISOLATEMAINSPOWER}

Next: p1302, !f1303

FLUE

Next: !p132, !f177

ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}

Next: !p1304, !f1305

OBSERVATION BOILER RESET

Next: !p1317, !f1318

OBSERVATION BOILER RESET

Next: !p1322, !f1323

DHW FLOW SWITCH

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE PURPLE WIRES FROM THE DHW FLOW SWITCH (ACTUATOR)

Next: p139, !f150

OVERHEAT THERMOSTAT

{ISOLATEMAINSPOWER}<

Next: p1910, !f358

RESISTANCE PRIMARY THERMISTOR AND HARNESS

{ISOLATEMAINSPOWER}<

Next: p142, f1784

RESISTANCE DHW THERMISTOR AND HARNESS

{ISOLATEMAINSPOWER}<

Next: p1992, f1787

IGNITION PRESSURE

{ISOLATEMAINSPOWER}<

Next: p185, f186

VENTURI

{ISOLATEMAINSPOWER}

Next: p1600, !f1601

FLUE

Next: !p1602, !f1603

OBSERVATION PUMP RUNS

{ISOLATEMAINSPOWER}
HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: p1683, f1687

PUMP LIMPET TEST

Next: p1694, !f1691

OBSERVATION SYSTEM PRESSURE

Next: p1679, ?1780, ?1782

DHW BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p1704, !f1693

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: p1698, !f1702

DHW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG CONNECTOR FROM THE DHW THERMISTOR

Next: p1690, !f1703

DIFFERENTIAL PRIMARY FLOW AND RETURN

{ISOLATEMAINSPOWER}
ATTACH TEMPERATURE CLAMPS TO PRIMARY FLOW AND RETURN AS INDICATED

Next: p1709, f1710

OBSERVATION RUN BOILER UP TO TEMPERATURE

{ISOLATEMAINSPOWER}<

Next: !p1722, ?1723, ?1725

NON RETURN VALVE

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p1717, !f1718

INFORMATION ANTI SCALD MODE

A KNOWN FAULT WITH T

Next: !p1730, !f1731

INSPECTION DHW CONTROL KNOB

{ISOLATEMAINSPOWER}
GAIN ACCESS TO THE REAR OF THE DISPLAY PCB BY REMOVING THE MAIN PCB

Next: p1729, !f1739

INSPECTION CH CONTROL KNOB

{ISOLATEMAINSPOWER}
GAIN ACCESS TO THE REAR OF THE DISPLAY PCB BY REMOVING THE MAIN PCB

Next: !p1744, !f1746

BYPASS VALVE

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p1751, !f1752

PUMP LIMPET TEST

Next: p737, !f1765

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: p1768, !f1769

OVERHEAT THERMOSTAT

{ISOLATEMAINSPOWER}<

Next: p1770, !f1771

DIFFERENTIAL PRIMARY FLOW AND RETURN

{ISOLATEMAINSPOWER}
ATTACH TEMPERATURE CLAMPS TO PRIMARY FLOW AND RETURN AS INDICATED

Next: p1772, !f1773

VOLTAGE AT IGNITION BOARD CONSTANT

{ISOLATEMAINSPOWER}<

Next: !p1774, !f1775

FUSE F2

{ISOLATEMAINSPOWER}
REMOVE FUSE F2 FROM THE MAIN PCB

Next: p1799, f1800

FUSE F1

{ISOLATEMAINSPOWER}
REMOVE FUSE F1 FROM THE MAIN PCB

Next: !p1803, f1804

RESISTANCE HARNESS DISPLAY BOARD

{ISOLATEMAINSPOWER}
REMOVE THE DISPLAY BOARD HARNESS FROM THE BOILER

Next: p1809, !f1808

INSPECTION SELECTOR SWITCH

{ISOLATEMAINSPOWER}
GAIN ACCESS TO THE REAR OF THE DISPLAY PCB BY REMOVING THE MAIN PCB

Next: !p1810, !f1811

INSPECTION DIVERTER VALVE SPINDLE

{ISOLATEMAINSPOWER}<

Next: p1829, !f1843

RESISTANCE DIVERTER VALVE

{ISOLATEMAINSPOWER}
REMOVE DIVERTER VALVE ACTUATOR AND DISCONNECT ELECTRICAL CONNECTOR

Next: p1831, !f1840

RESISTANCE PUMP

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR M15 FROM THE PCB

Next: p1832, !f1833

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR M12 FROM THE PCB

Next: p1834, !f1835

RESISTANCE GAS VALVE

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR 1 (MIDDLE) FROM THE IGNITION PCB

Next: p1836, !f1837

RESISTANCE SPARK GENERATOR

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR 2 (RIGHT) FROM THE IGNITION PCB

Next: p2063, !f1839

ELECTRODE POSITION

{ISOLATEMAINSPOWER}

Next: !p242, !f190

INSPECTION SELECTOR SWITCH

{ISOLATEMAINSPOWER}
GAIN ACCESS TO THE REAR OF THE DISPLAY PCB BY REMOVING THE MAIN PCB

Next: p1854, !f1855

OBSERVATION IS AN INTERNAL CLOCK FITTED

Next: p1856, f1857

OBSERVATION ARE EXTERNAL CONTROLS FITTED

Next: p1862, f1863

BYPASS EXTERNAL CONTROLS (NO INTERNAL CLOCK FITTED)

{ISOLATEMAINSPOWER}<

Next: !p1860, !f1861

BYPASS EXTERNAL CONTROLS (INTERNAL CLOCK FITTED)

{ISOLATEMAINSPOWER}<

Next: !p1866, f1867

GAS VALVE VOLTAGE FROM IGNITION PCB

{ISOLATEMAINSPOWER}<

Next: p1164, f367

PRIMARY HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p2056, !f1903

FLUE

Next: p1905, !f1906

DHW BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p1909, !f1908

RESISTANCE BURNER THERMOSTAT AND HARNESS

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB
DISCONNECT M3 FROM THE PCB

Next: p140, f1936

SYSTEM PRESSURE SWITCH

{ISOLATEMAINSPOWER}
DISCONNECT WHITE WIRES FROM THE SYSTEM PRESSURE SWITCH

Next: !p1990, !f1991

SYSTEM PRESSURE SWITCH

{ISOLATEMAINSPOWER}
DISCONNECT WHITE WIRES FROM THE SYSTEM PRESSURE SWITCH

Next: !p1993, !f1994

MEASUREMENT FAN PRESSURE

Next: p2019, f2071

VOLTAGE APS (FAN SPEED)

{ISOLATEMAINSPOWER}<

Next: p2027, f2028

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: p203, !f245

SPARK GENERATOR SUPPLY VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p2033, f2034

RESISTANCE HARNESS APS

{ISOLATEMAINSPOWER}
DISCONNECT PLUG TO APS

Next: !p2031, !f2032

MODULATING SOLENOID VOLTAGE

HOT WATER TEMPERATURE CONTROL SET TO MAXIMUM

Next: p205, !f206

ELECTRODE POSITION

{ISOLATEMAINSPOWER}

Next: p2037, !f2038

ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}

Next: !p2039, !f2040

MEASUREMENT FAN PRESSURE

Next: p2042, f2043

VOLTAGE APS (FAN SPEED)

{ISOLATEMAINSPOWER}<

Next: !p2050, f2051

VENTURI

{ISOLATEMAINSPOWER}

Next: p2046, !f2047

FLUE

Next: !p2048, !f2049

MODULATING SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT GREY WIRES FROM THE MODULATING SOLENOID

Next: p207, !f1230

RESISTANCE HARNESS APS

{ISOLATEMAINSPOWER}
DISCONNECT PLUG TO APS

Next: !p2054, !f2055

INSPECTION BURNER

{ISOLATEMAINSPOWER}

Next: p1904, !f2062

RESISTANCE BURNER THERMOSTAT AND HARNESS TO EARTH

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB
DISCONNECT M3 FROM THE PCB

Next: !p2064, f2066

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p209, !f210

VENTURI

{ISOLATEMAINSPOWER}

Next: p2074, !f2075

FLUE

Next: !p2076, !f2077

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p2079, !f2080

VENTURI

{ISOLATEMAINSPOWER}

Next: p2085, !f2082

FLUE

Next: !p2083, !f2084

PRIMARY HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p2081, !f2089

PRIMARY HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p212, !f213

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p904, !f215

ELECTRODE POSITION

{ISOLATEMAINSPOWER}

Next: p217, !f240

ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}

Next: !p235, !f241

PUMP LIMPET TEST

Next: p304, !f356

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: p1743, !f337

DIVERTER VALVE HEAD

{ISOLATEMAINSPOWER}<

Next: p310, f311

DIVERTER VALVE BODY

{ISOLATEMAINSPOWER}
REMOVE DIVERTER VALVE HEAD

Next: p314, !f338

PUMP LIMPET TEST

Next: !p316, !f340

PUMP LIMPET TEST

Next: p713, !f321

DHW FLOW SWITCH

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE PURPLE WIRES FROM THE DHW FLOW SWITCH (ACTUATOR)

Next: !p348, !f352

CH OPERATION

CENTRAL HEATING TEMPERATURE CONTROL SET TO MAXIMUM

Next: !p587, f1747

DIVERTER VALVE HEAD

{ISOLATEMAINSPOWER}<

Next: !p581, f582

DHW FLOW SWITCH

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE PURPLE WIRES FROM THE DHW FLOW SWITCH (ACTUATOR)

Next: p891, !f706

FLOW REGULATOR

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p708, !f709

BYPASS VALVE

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p714, !f723

OVERHEAT THERMOSTAT

{ISOLATEMAINSPOWER}<

Next: p738, !f739

PRIMARY THERMISTOR

{ISOLATEMAINSPOWER}<

Next: p740, !f741

DHW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG CONNECTOR FROM THE DHW THERMISTOR

Next: p1092, !f743

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p892, f893

NON RETURN VALVE

{ISOLATEMAINSPOWER}
CLOSE COLD WATER INLET STOPCOCK
DRAIN AND DISCHARGE APPLIANCE

Next: !p898, !f899

System Information

Total Tests: 447
Sequence Logic: Decoded from encrypted .seq file
Navigation: Dynamic based on pass/fail results
Source: 4731307 GW SWIFTFLOW 100 SIT Control