XSol Diagnostic System

WORCESTER 240 RSF

G.C. NUMBER 47 311 1

Next: &17, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

HOT WATER

SELECTOR SWITCH WATER POSITION

Next: &nff, ?18, ?20

HW BURNER MODULATION

{ISOLATEMAINSPOWER}<

Next: &1, f100

DHW HIGH FLAME

{ISOLATEMAINSPOWER}<

Next: &2, f149

HW PILOT IGNITES

OPERATING SWITCH IN WATER POSITION

Next: &3, !f94

HW DEMAND INDICATOR

OPERATING SWITCH IN WATER POSITION

Next: &4, f266

PUMP OVERRUN

OPERATING SWITCH IN HEATING AND WATER POSITION
TEMPERATURE CONTROL TO MAX

Next: &5, !f90

CENTRAL HEATING

SELECTOR SWITCH HEATING AND WATER POSITION.

Next: &6, ?86, ?88

C/H BURNER MODULATION

OPERATING SWITCH IN HEATING & WATER POSITION.
TEMPERATURE CONTROL TO MAX

Next: &7, f173

C/H HIGH FLAME

{ISOLATEMAINSPOWER}<

Next: &8, ?205, ?207

C/H LOW FLAME

{ISOLATEMAINSPOWER}<

Next: &197, f67

WATER PUMP RUNNING

OPERATING SWITCH IN HEATING & WATER POSITION

Next: &103, f37

POWER ON INDICATOR

Next: &230, f24

WORCESTER 240 RSF

{ISOLATEMAINSPOWER}<

Next: &15, !f22

C/H PILOT IGNITES

OPERATING SWITCH IN HEATING & WATER POSITION

Next: &10, ?311, ?313

C/H LOW FLAME CORRECT PRESSURE

{ISOLATEMAINSPOWER}<

Next: &9, !f198

C/H DEMAND INDICATOR

OPERATING SWITCH IN HEATING & WATER POSITION.

Next: &12, ?231, ?233

FUSE INVESTIGATION TREE

BLANK

Next: &nff, f286

HW BURNER MODULATION

HOT WATER TEMPERATURE SENSOR FIXING.

Next: End

CH HIGH FLAME

CENTRAL HEATING TEMPERATURE SENSOR FIXING

Next: End

CH BURNER MODULATION

GAS VALVE (MODUREG PRESSURE REDUCING VALVE)

Next: End

CH BURNER MODULATION

TEMPERATURE CONTROL POTENTIOMETER.

Next: End

CH MODULATION

CENTRAL HEATING TEMPERATURE SENSOR.

Next: End

HW BURNER MODULATION

HOT WATER TEMPERATURE SENSOR.

Next: End

LOW FLAME CORRECT

GAS VALVE (MODUREG PRESSURE REDUCING VALVE)

Next: End

CH HIGH FLAME

GAS INLET PRESSURE

Next: End

CH HIGH FLAME

CENTRAL HEATING TEMPERATURE SENSOR.

Next: End

CH HIGH FLAME

TEMPERATURE CONTROL POTENTIOMETER.

Next: End

ELECTRICAL CHECK

ELECTRICAL CHECK.

Next: End

POWER ON INDICATOR

POWER ON INDICATOR NEON (AMBER).

Next: End

CH DEMAND INDICATOR

OPERATING SWITCH / PROGRAMMER

Next: End

CH DEMAND INDICATOR

DIVERTER VALVE (MICROSWITCH).

Next: End

CH DEMAND INDICATOR

DEMAND INDICATOR NEON (GREEN).

Next: End

FROST THERMOSTAT (IF FITTED)

FROST THERMOSTAT (OPTIONAL).

Next: End

C/H HIGH FLAME

DIVERTER VALVE (DIAPHRAGM SPINDLE).

Next: End

HW HIGH FLAME

DIVERTER VALVE (MICROSWITCH).

Next: End

CH HIGH FLAME DOES NOT INCREASE

DIVERTER VALVE (DIAPHRAGM SPINDLE).

Next: End

HW DEMAND INDICATOR

DIVERTER VALVE (MICROSWITCH).

Next: End

HW DEMAND INDICATOR

WATER SUPPLY

Next: End

HW DEMAND INDICATOR

ISOLATING VALVE (DHW)

Next: End

HW DEMAND INDICATOR

FILTER - STAINLESS STEEL

Next: End

HW DEMAND INDICATOR

FLOW REGULATOR

Next: End

FUSE INVESTIGATION

WATER PUMP.

Next: End

FUSE INVESTIGATION

FAN ASSEMBLY.

Next: End

FUSE INVESTIGATION

MAIN GAS VALVE

Next: End

FUSE F1

FUSE F1.

Next: End

POWER ON INDICATOR

MAINS FUSE

Next: End

CH PILOT IGNITES

CENTRAL HEATING TEMPERATURE SENSOR.

Next: End

CH PILOT IGNITES

FUSE F2.

Next: End

AIR PRESSURE SWITCH: NO AIR

AIR PRESSURE SWITCH.

Next: End

CH PILOT IGNITES

OVERHEAT THERMOSTAT.

Next: End

CH PILOT IGNITES

FLUE ASSEMBLY

Next: End

AIR PRESSURE SWITCH TUBES

Next: End

PILOT IGNITES

FAN ASSEMBLY.

Next: End

CH PILOT IGNITES

ELECTRODE LEAD (SPARK).

Next: End

CH PILOT IGNITES

ELECTRODE (SPARK)

Next: End

PILOT VOLTAGE

IGNITION CONTROL BOARD.

Next: End

CH PILOT IGNITES

PILOT INJECTOR.

Next: End

PILOT

GAS INLET PRESSURE

Next: End

WATER PUMP RUNNING

PUMP OVERRUN THERMOSTAT.

Next: End

CH LOW FLAME

SENSING ELECTRODE LEAD

Next: End

CH LOW FLAME

SENSING ELECTRODE.

Next: End

CH LOW FLAME

MAIN GAS VALVE

Next: End

PUMP OVERRUN

PUMP OVERRUN THERMOSTAT.

Next: End

HW PILOT IGNITES

HOT WATER TEMPERATURE SENSOR.

Next: End

DHW HIGH FLAME

HOT WATER TEMPERATURE SENSOR.

Next: End

INLET PRESSURE

GAS INLET PRESSURE

Next: End

HOT WATER

SECONDARY HEAT EXCHANGER (WATER TO WATER).

Next: End

CH MODULATION

MAIN DRIVER BOARD

Next: End

HOT WATER

DIVERTER VALVE.

Next: End

CH HIGH FLAME

GAS VALVE (MODUREG PRESSURE REDUCING VALVE)

Next: End

CH DEMAND INDICATOR

ROOM THERMOSTAT (OPTIONAL).

Next: End

FAULTY DEMAND NEON

Z REDIRECT

Next: End

DEMAND NEON LIT

PUMP OVERRUN THERMOSTAT.

Next: End

PRESSURE INCREASES IMMEDIATELY

MAIN DRIVER BOARD

Next: End

PRESSURE INCREASES IMMEDIATELY

DIVERTER VALVE (MICROSWITCH).

Next: End

CH HIGH FLAME

MAIN DRIVER BOARD

Next: End

DHW HIGH FLAME

MAIN DRIVER BOARD

Next: End

DHW MODULATION

MAIN DRIVER BOARD

Next: End

C/H HIGH FLAME

DIVERTER VALVE (MICROSWITCH).

Next: End

HW DEMAND INDICATOR

OPERATING SWITCH / PROGRAMMER

Next: End

FAULTY POWER NEON

Z REDIRECT

Next: End

HW DEMAND INDICATOR

SECONDARY HEAT EXCHANGER (WATER TO WATER).

Next: End

HW DEMAND INDICATOR

DIVERTER VALVE (DIAPHRAGM SPINDLE).

Next: End

NO FAULT FUSE INVESTIGATION

FUSE FURTHER INVESTIGATION

Next: End

FUSE INVESTIGATION F1

Z REDIRECT

Next: End

MAINS ELECTRICITY SUPPLY

MAINS ELECTRICITY SUPPLY.

Next: End

MAINS FUSE

Z REDIRECT

Next: End

CH PILOT IGNITES

MAIN GAS VALVE

Next: End

CH PILOT IGNITES

MAIN DRIVER BOARD

Next: End

CH PILOT IGNITESFUSE INVESTIGATION F1

Z REDIRECT

Next: End

CH PILOT IGNITES

FAN ASSEMBLY.

Next: End

AIR PRESSURE SWITCH: NO AIR

IGNITION CONTROL BOARD.

Next: End

SPARK GENERATOR

AIR PRESSURE SWITCH.

Next: End

SPARK GENERATOR

IGNITION CONTROL BOARD.

Next: End

INJECTOR

MAIN GAS VALVE

Next: End

WATER PUMP RUNNING

WATER PUMP.

Next: End

CH LOW FLAME

IGNITION CONTROL BOARD.

Next: End

CH LOW FLAME

MAIN BURNER.

Next: End

CENTRAL HEATING

PRIMARY HEAT EXCHANGER (GAS TO WATER).

Next: End

CENTRAL HEATING

Next: End

DHW HIGH FLAME

GAS VALVE (MODUREG PRESSURE REDUCING VALVE)

Next: End

HOT WATER UNSATISFACTORY RADIATORS REMAIN COLD

CHARACTERISTIC TEST FROM HOT WATER

Next: !p19

HOT WATER UNSATISFACTORY RADIATORS GET WARM

CHARACTERISTIC TEST FROM HOT WATER

Next: !p21

BURNER PRESSURE DOES NOT INCREASE

CHARACTERISTIC TEST FROM C/H HIGH FLAME

Next: p209

BURNER PRESSURE INCREASES IMMEDIATELY

CHARACTERISTIC TEST FROM C/H HIGH FLAME

Next: p245

DEMAND NEON ILLUMINATED WITH NO DEMAND

CHARACTERISTIC TEST FROM C/H DEMAND INDICATOR

Next: p232

DEMAND NEON DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM C/H DEMAND INDICATOR

Next: p234

PILOT PERMANENTLY LIT

CHARACTERISTIC TEST FROM C/H PILOT IGNITES

Next: !p312

PILOT DOES NOT LIGHT

CHARACTERISTIC TEST FROM C/H PILOT IGNITES

Next: p315

HEAT EXCHANGER NOISY

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p87

HEAT EXCHANGER QUIET

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p89

24/08/2018 12:12:12 1808_1_50_1 20/09/2018 10:51:34

24/08/2018 14:05:54

Next: End

HW SENSOR FIXING

{ISOLATEMAINSPOWER}

Next: p194, !f101

INLET PRESSURE DHW

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
GAS ON

Next: !p155, f95

C/H SENSOR FIXING

{ISOLATEMAINSPOWER}

Next: p175, !f174

TEMPERATURE POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: p250, !f217

OPERATING SWITCH

OPERATING SWITCH IN THE HEATING & WATER POSITION.

Next: !p237, !f238

FUSE F1

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

Next: p26, f298

DIVERTER VALVE SPINDLE

{ISOLATEMAINSPOWER}
REMOVE THE DIVERTER VALVE MICRO SWITCH COVER.

Next: !p248, !f249

DIVERTER VALVE SPINDLE

{ISOLATEMAINSPOWER}
REMOVE THE DIVERTER VALVE MICRO SWITCH COVER.

Next: !p264, !f265

DIVERTER VALVE SPINDLE

{ISOLATEMAINSPOWER}
REMOVE THE DIVERTER VALVE MICRO SWITCH COVER.

Next: p267, f273

OBSERVATION DHW FLOW RATE

Next: !p284, f275

OBSERVATION MAINS FLOW INTO BOILER

Next: p276, !f277

RESISTANCE PUMP

{ISOLATEMAINSPOWER}
DISCONNECT 4 PIN CONNECTOR X6 MARKED "PUMP" ON MAIN DRIVER BOARD

Next: p287, !f288

FUSE FURTHER INVESTIGATION

Next: !p299, !f300

RESISTANCE MAINS FUSE

{ISOLATEMAINSPOWER}
REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p302, f303

FUSE FURTHER INVESTIGATION

Next: !p304, !f305

SENSOR CHECK RELAY OPERATION

{ISOLATEMAINSPOWER}
OPERATING SWITCH IN HEATING & WATER POSITION

Next: p318, f319

RESISTANCE CH SENSOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG (WHITE WIRES) FROM CONNECTION X2 ON MAIN DRIVER BOARD

Next: p320, !f321

FUSE FURTHER INVESTIGATION

Next: !p324, !f325

IGNITION CONTROL BOARD LIVE

{ISOLATEMAINSPOWER}
OPERATING SWITCH IN HEATING & WATER POSITION

Next: !p330, !f331

FLUE

Next: p334, !f335

SPARK ELECTRODE LEAD

{ISOLATEMAINSPOWER}

Next: p342, !f343

WATER PUMP VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p39, !f38

MAIN GAS VALVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p69, f68

FLAME SENSE ELECTRODE LEAD

{ISOLATEMAINSPOWER}

Next: p71, !f70

MODUREG VOLTAGE DHW

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)
TURN HOT WATER TAP ON

Next: !p97, f96

HW SENSOR

{ISOLATEMAINSPOWER}
REMOVE THE MIDDLE PLUG (RED WIRES) FROM CONNECTOR X2 ON MAIN DRIVER BOARD

Next: p256, !f98

MODUREG RESISTANCE

{ISOLATEMAINSPOWER}<

Next: p187, !f177

RESISTANCE CH SENSOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG (WHITE WIRES) FROM CONNECTION X2 ON MAIN DRIVER BOARD

Next: p188, !f190

TEMPERATURE POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: !p191, !f189

HW SENSOR

{ISOLATEMAINSPOWER}
REMOVE THE MIDDLE PLUG (RED WIRES) FROM CONNECTOR X2 ON MAIN DRIVER BOARD

Next: !p259, !f195

INLET PRESSURE CH

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
GAS ON

Next: p210, !f211

RESISTANCE CH SENSOR

{ISOLATEMAINSPOWER}
REMOVE THE PLUG (WHITE WIRES) FROM CONNECTION X2 ON MAIN DRIVER BOARD

Next: p212, !f213

MODUREG VOLTAGE C/H

OPERATING SWITCH IN HEATING & WATER POSITION

Next: !p214, f215

INFORMATION POWER ON NEON

Next: !p271, !f229

OBSERVATION DISCONNECT FROST THERMOSTAT (IF FITTED)

{ISOLATEMAINSPOWER}<

Next: !p243, !f244

ROOM THERMOSTAT

{ISOLATEMAINSPOWER}<

Next: p235, f236

C/H DEMAND VOLTAGE

OPERATING SWITCH IN HEATING & WATER POSITION.

Next: p239, !f240

INFORMATION DEMAND NEON

Next: !p241, !f242

RESISTANCE DIVERTER VALVE MICROSWITCH DHW HIGH FLAME (OPEN CIRCUIT)

{ISOLATEMAINSPOWER}<

Next: !p246, f247

RESISTANCE DIVERTER VALVE MICROSWITCH DHW HIGH FLAME (OPEN CIRCUIT)

{ISOLATEMAINSPOWER}<

Next: !p251, f263

RESISTANCE DIVERTER VALVE MICROSWITCH DHW HIGH FLAME

{ISOLATEMAINSPOWER}<

Next: !p257, !f258

MAINS POWER INPUT

Next: p227, f301

DIVERTER VALVE MICROSWITCHES HW

{ISOLATEMAINSPOWER}
OPERATING SWITCH IN WATER POSITION

Next: !p269, !f270

INSPECTION DHW ISOLATION VALVE

{ISOLATEMAINSPOWER}

Next: p278, !f279

INSPECTION DHW FILTER

{ISOLATEMAINSPOWER}
TURN OFF COLD WATER SUPPLY TO APPLIANCE

Next: p280, !f281

INSPECTION FLOW REGULATOR

{ISOLATEMAINSPOWER}
TURN OFF COLD WATER SUPPLY TO APPLIANCE

Next: !p282, !f283

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT 5 PIN CONNECTOR MARKED CN5 ON THE IGNITION PCB

Next: p295, !f290

RESISTANCE GAS VALVE

{ISOLATEMAINSPOWER}
DISCONNECT 9 PIN CONNECTOR MARKED CN3 ON THE IGNITION PCB

Next: !p296, !f297

FAN RUNNING

OPERATING SWITCH IN HEATING & WATER POSITION

Next: p316, f317

AIR PRESSURE SWITCH: AIR DETECT

{ISOLATEMAINSPOWER}<

Next: p332, f333

AIR PRESSURE SWITCH: NO AIR

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR CN2 FROM THE IGNITION CONTROL BOARD

Next: p326, !f327

FUSE F2

{ISOLATEMAINSPOWER}

Next: !p322, f323

FAN VOLTAGE

OPERATING SWITCH IN HEATING & WATER POSITION

Next: !p328, f329

SPARK ELECTRODE

Next: p340, f341

INSPECTION AIR PRESSURE TUBES

{ISOLATEMAINSPOWER}

Next: p336, !f337

INSPECTION FAN ASSEMBLY

{ISOLATEMAINSPOWER}
REMOVE FAN ASSEMBLY FROM BOILER

Next: !p338, !f339

PILOT SOLENOID VOLTAGE

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

Next: p356, !f347

SPARK ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}

Next: !p344, !f345

PILOT INJECTOR INSPECTION

{ISOLATEMAINSPOWER}

Next: p357, !f358

INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: !p359, !f360

MAIN GAS VALVE MECHANICAL OPERATION

{ISOLATEMAINSPOWER}<

Next: !p75, !f74

FLAME SENSE ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p73, !f72

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