XSol Diagnostic System

POTTERTON PUMA 80 (S.I.T.)

GLOBALLY REPLACED

Next: &20, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

PUMP OVERRUN

BOILER SWITCH IN ON

Next: &nff, !f110

CENTRAL HEATING

CENTRAL HEATING SWITCH IN CONSTANT POSITION
BOILER SWITCH IN ON POSITION

Next: &279, f107

CH HIGH FAN

CENTRAL HEATING SWITCH IN CONSTANT POSITION
BOILER SWITCH IN ON POSITION
ENSURE BOILER IS COOL

Next: &277, f94

HOT WATER

BOILER SWITCH IN ON

Next: &5, ?76, ?78, ?80

DHW WATER PUMP RUNNING

BOILER SWITCH IN ON

Next: &163, f73

DHW HIGH FAN

BOILER SWITCH IN ON POSITION
CENTRAL HEATING SWITCH IN OFF (CENTRAL) POSITION

Next: &143, f50

DHW DEMAND LED ON

{GAINPCBACS}
BOIL

Next: &157, f43

SLOW FAN

BOILER SWITCH IN STANDBY POSITION
CENTRAL HEATING SWITCH IN OFF (CENTRAL) POSITION

Next: &10, f38

FROST THERMOSTAT

{GAINPCBACS}
CENTRAL HEATING SWITCH OFF
DISCONNECT PLUG PL1

Next: &11, !f37

LOW SYSTEM PRESSURE LED

BOILER SWITCH IN STANDBY POSITION
CENTRAL HEATING SWITCH IN OFF (CENTRAL) POSITION

Next: &12, f32

MAINS LED

BOILER SWITCH IN STANDBY POSITION
CENTRAL HEATING SWITCH IN OFF (CENTRAL) POSITION

Next: &13, f21

PILOT FLAME FAILURE

Next: &14, !f126

ESTABLISH PILOT

BOILER SWITCH IN STA

Next: &15, f15

PILOT IGNITION

BOILER SWITCH IN STA

Next: &16, f8

PILOT SPARKING

BOILER SWITCH IN STANDBY POSITION
CENTRAL HEATING SWITCH IN OFF(CENTRAL) POSITION

Next: &17, f136

POTTERTON PUMA 80 (S.I.T.)

G.C. NUMBER 47 590 1

Next: &18, !f1

DHW BURNER IGNITES

BOILER SWITCH IN ON

Next: &7, f198

DHW DEMAND LED OFF

BOILER SWITCH IN STA

Next: &9, f158

DHW BURNER PRESSURE MINIMUM

ATTACH PRESSURE GAUG

Next: &165, f219

DHW BURNER PRESSURE MAXIMUM

ATTACH PRESSURE GAUG

Next: &175, f222

DHW MODULATION

ATTACH PRESSURE GAUG

Next: &6, ?176, ?178

OBSERVATION CH FULL RATE

ATTACH PRESSURE GAUG

Next: &2, ?265, ?267, ?269

CH PUMP RUNNING

SLACKEN WATER PUMP MANUAL RESTART NUT, TAKE CARE TO SAFELY CONTAIN ANY WATER RELEASED

Next: &264, !f278

CH BURNER MODULATION

CENTRAL HEATING SWIT

Next: &1, f280

FUSE FURTHER INVESTIGATION

Next: &nff, f297

ELECTRICAL SAFETY CHECKS

ELECTRICAL CHECKS

Next: End

BOILER SWITCH

MODULATION CONTROL BOARD

Next: End

CENTRAL HEATING

DIVERTER VALVE

Next: End

PUMP OVERRUN

MODULATION CONTROL BOARD

Next: End

PILOT FLAME FAILURE

GAS VALVE (THERMOELECTRIC VALVE)

Next: End

PILOT SPARKING

ELECTRODE LEAD

Next: End

PILOT IGNITION

PILOT ASSEMBLY

Next: End

PILOT SPARKING

SPARK ELECTRODE

Next: End

ESTABLISH PILOT

THERMOCOUPLE

Next: End

DHW DEMAND LED OFF

DHW FLOW SWITCH

Next: End

DHW DEMAND LED OFF

DHW DEMAND SWITCH

Next: End

ESTABLISH PILOT

OVERHEAT THERMOSTAT

Next: End

DHW BURNER CYCLING ON AND OFF

FAN VENTURI

Next: End

DHW BURNER CYLING ON AND OFF

AIR PRESSURE TUBE

Next: End

DHW BURNER CYCLING ON AND OFF

FAN

Next: End

DHW BURNER CYCLING ON AND OFF

HEAT EXCHANGER

Next: End

DHW BURNER CYCLING ON AND OFF

FLUE

Next: End

DHW BURNER MODUALTION

DHW TEMPERATURE SENSOR

Next: End

DHW BURNER MODULATION

DISPLAY BOARD (DHW POTENTIOMETER)

Next: End

DHW BURNER IGNITES

AIR PRESSURE SWITCH

Next: End

DOES NOT CROSS LIGHT

AIR PRESSURE TUBE

Next: End

DOES NOT CROSS LIGHT

FAN VENTURI

Next: End

DOES NOT CROSS LIGHT

FAN

Next: End

DHW BURNER IGNITES

FLUE

Next: End

DHW BURNER IGNITES

INLET PRESSURE

Next: End

PILOT IGNITION

INLET PRESSURE

Next: End

DHW BURNER PRESSURE MIN

INLET PRESSURE

Next: End

DHW BURNER PRESSURE

DHW TEMPERATURE SENSOR

Next: End

DHW BURNER PRESSURE

DISPLAY BOARD (DHW POTENTIOMETER)

Next: End

DHW BURNER PRESSURE MAX

INLET PRESSURE

Next: End

BURNER CYCLES ON AND OFF

AIR PRESSURE SWITCH

Next: End

BOILER CYCLES ON AND OFF

DHW OVERHEAT THERMOSTAT

Next: End

CH FULL RATE

WATER PUMP

Next: End

CH FULL RATE - SHUTTING DOWN

CH TEMPERATURE SENSOR

Next: End

CH FULL RATE - STAYING ON LOW

CH TEMPERATURE SENSOR

Next: End

CH PUMP RUNNING

MODULATION CONTROL BOARD

Next: End

MODULATION BOARD VOLTAGE

MODULATION CONTROL BOARD

Next: End

CH BURNER MODULATION

CH TEMPERATURE SENSOR

Next: End

DHW MODULATION - CYCLES

DHW TEMPERATURE SENSOR

Next: End

FUSE INVESTIGATION

WATER PUMP

Next: End

MAINS LED

DISPLAY BOARD CABLE

Next: End

FUSE INVESTIGATION

FAN

Next: End

FUSE INVESTIGATION

SOLENOID OPERATOR - SIT

Next: End

FUSE INVESTIGATION

GAS VALVE

Next: End

FUSE INVESTIGATION

TRANSFORMER

Next: End

MAINS LED

FUSE F1

Next: End

FUSE F1

MODULATION CONTROL BOARD

Next: End

MAINS LED

MAINS FUSE

Next: End

FUSE INVESTIGATION

WATER PRESSURE SWITCH

Next: End

OBSERVATION CH FULL RATE

WAX SENSOR

Next: End

LOW SYSTEM PRESSURE LED

SYSTEM PRESSURE

Next: End

LOW SYSTEM PRESSURE LED

WATER SYSTEM PRESSURE SWITCH

Next: End

FROST THERMOSTAT

Next: End

SLOW FAN

TRANSFORMER

Next: End

DHW DEMAND LED ON

DHW FLOW SWITCH

Next: End

DHW DEMAND LED ON

DHW DEMAND SWITCH

Next: End

DHW BOILER SWITCH (POWER IN)

MODULATION CONTROL BOARD

Next: End

DHW HIGH FAN

AIR PRESSURE SWITCH

Next: End

DHW HIGH FAN

DHW OVERHEAT THERMOSTAT

Next: End

DHW HIGH FAN

DISPLAY BOARD CABLE

Next: End

DHW HIGH FAN

DHW TEMPERATURE SENSOR

Next: End

DHW WATER PUMP RUNNING

MODULATION CONTROL BOARD

Next: End

CH HIGH FAN

CH SWITCH

Next: End

CH SWITCH

MODULATION CONTROL BOARD

Next: End

PILOT IGNITION

ELECTRODE ALIGNMENT

Next: End

CH HIGH FAN

Next: End

CH HIGH FAN

CH TEMPERATURE SENSOR

Next: End

CENTRAL HEATING

DRIPPING TAP AND/OR LEAKING SUPPLY

Next: End

FLOW RATE INCREASES WITH RISE IN DHW TEMPERATURE, BUT NOT TO MAXIMUM

HEAT EXCHANGER

Next: End

PILOT IGNITION

GAS VALVE (THERMOELECTRIC VALVE)

Next: End

ESTABLISH PILOT

GAS VALVE (THERMOELECTRIC VALVE)

Next: End

MAINS LED

DISPLAY BOARD (POWER ON NEON)

Next: End

PILOT SPARKING

PIEZO IGNITER

Next: End

DHW DEMAND LED OFF

MODULATION CONTROL BOARD

Next: End

DHW BURNER CYCLING ON AND OFF

MODULATION CONTROL BOARD

Next: End

DHW BURNER MODULATION

MODULATION CONTROL BOARD

Next: End

DHW BURNER IGNITES

GAS VALVE

Next: End

DHW BURNER IGNITES

MODULATION CONTROL BOARD

Next: End

DHW BURNER MODULATION

GAS VALVE

Next: End

MINIMUM SET WRONG

GAS VALVE

Next: End

DHW BURNER PRESSURE

GAS VALVE

Next: End

DHW BURNER PRESSURE

MODULATION CONTROL BOARD

Next: End

CH FULL RATE

MODULATION CONTROL BOARD

Next: End

CH FULL RATE

MODULATION BOARD POT

Next: End

CH BURNER MODULATION

DISPLAY BOARD (CH POTENTIOMETER)

Next: End

F1 FUSE INVESTIGATION

Z REDIRECT

Next: End

MAINS LED

TRANSFORMER

Next: End

MAINS LED

Next: End

MAINS FUSE FURTHER INVESTIGATION

Z REDIRECT

Next: End

FUSE INVESTIGATION

FUSE BLOWN

Next: End

CH FULL RATE

Next: End

LOW SYSTEM PRESSURE LED

MODULATION CONTROL BOARD

Next: End

SLOW FAN

FAN

Next: End

SLOW FAN

MODULATION CONTROL BOARD

Next: End

DHW DEMAND LED ON

MODULATION CONTROL BOARD

Next: End

DHW HIGH FAN

ON/OFF SWITCH

Next: End

AIR PRESSURE SWITCH: NO AIR

MODULATION CONTROL BOARD

Next: End

DHW WATER PUMP RUNNING

WATER PUMP

Next: End

HOT WATER

WATER SYSTEM PRESSURE SWITCH

Next: End

HOT WATER

DHW FLOW LIMITER

Next: End

BURNER DOES NOT MODULATE

CHARACTERISTIC TEST FROM DHW MODULATION

Next: p177

BURNER REPEATEDLY CUTS OUT BEFORE MODULATION TAKES PLACE

CHARACTERISTIC TEST FROM DHW MODULATION

Next: p238

BOILER REMAINS ON LOW RATE

CHARACTERISTIC TEST FROM OBSERVATION CH FULL RATE

Next: p266

BOILER SHUTS DOWN BEFORE IT CAN RUN FOR 2 MINUTES

CHARACTERISTIC TEST FROM OBSERVATION CH FULL RATE

Next: p268

BOILER INCREASES TO MAXIMUM RATE IMMEDIATELY

CHARACTERISTIC TEST FROM OBSERVATION CH FULL RATE

Next: !p270

BURNER CUTS OUT, LOW WATER PRESSURE, NEON LIGHTS

CHARACTERISTIC TEST FROM HOT WATER

Next: !p77

FLOW RATE DOES NOT INCREASE WITH RISE IN DHW TEMPERATURE

CHARACTERISTIC TEST FROM HOT WATER

Next: !p79

FLOW RATE INCREASES WITH RISE IN DHW TEMPERATURE, BUT NOT TO MAX

CHARACTERISTIC TEST FROM HOT WATER

Next: !p113

18/07/2018 11:14:56 1807_1_50_1 20/07/2018 14:22:27

18/07/2018 14:33:33

Next: End

DIVERTER VALVE OPERATION

TURN OFF THE MAINS W

Next: !p109, !f108

ELECTRODE LEAD

Next: p140, !f138

THERMOCOUPLE VOLTAGE

CLIP ONE LEAD OF MUL

Next: p17, !f16

DHW FLOW SWITCH OPERATION

Next: p159, !f160

DHW TEMPERATURE SENSOR

Next: p192, !f193

INLET PRESSURE

BOILER SWITCH IN ON

Next: p199, !f212

AIR PRESSURE SWITCH AIR DETECT

DISCONNECT LEADS FRO

Next: p202, !f203

TRANSFORMER VOLTAGE

{GAINPCBACS}
BOILER SWITCH IN ON POSITION

Next: p23, f308

INLET PRESSURE

BOILER SWITCH IN ON

Next: !p220, !f221

INLET PRESSURE

BOILER SWITCH IN ON

Next: p230, !f237

DHW TEMPERATURE SENSOR

Next: p233, !f234

NTC - CH RESISTANCE

Next: !p281, !f282

RESISTANCE PUMP

DISCONNECT INLINE CONNECTOR FOR THE PUMP

Next: p298, !f299

FUSE F1

REMOVE FUSE F1 FROM MODULATION CONTROL BOARD

Next: p309, f310

FUSE FURTHER INVESTIGATION

Next: !p311, !f312

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: !p319, f320

SYSTEM PRESSURE

Next: p34, !f33

FUSE FURTHER INVESTIGATION

Next: !p321, !f323

SLOW FAN VOLTAGE

Next: !p40, f39

TRANSFORMER 90V AC

{GAINPCBACS}

Next: !p42, !f41

DHW FLOW SWITCH

Next: p45, !f44

BOILER SWITCH (POWER OUT)

{GAINPCBACS}
BOILER SWITCH IN ON POSITION
CENTRAL HEATING SWITCH IN OFF (CENTRAL) POSITION

Next: p52, f51

DHW BOILER SWITCH (POWER IN)

BOILER SWITCH IN ON POSITION
CENTRAL HEATING SWITCH IN OFF (CENTRAL) POSITION

Next: !p54, !f53

WATER PUMP VOLTAGE

BOILER SWITCH IN ON POSITION
CENTRAL HEATING SWITCH IN CONSTANT POSITION

Next: !p75, !f74

IGNITE PILOT WITH MATCH

TURN GAS CONTROL KNOB TO PILOT POSITION

Next: !p10, f9

INLET PRESSURE PILOT

CONNECT PRESSURE GAU

Next: p12, !f213

ROOM THERMOSTAT

{GAINPCBACS}
CENTRAL HEATING SWITCH IN CONSTANT POSITION
ROOM THERMOSTAT CALLING FOR HEAT

Next: p96, f95

CH SWITCH

CENTRAL HEATING SWITCH IN CONSTANT POSITION

Next: p98, !f97

PILOT BURNER BLOCKED

Next: !p124, !f14

SPARK ELECTRODE INSPECTION

REMOVE SPARK ELECTRODE

Next: !p142, !f141

DHW MICROSWITCH

REMOVE BOTH ORANGE WIRES FROM DHW DEMAND MICROSWITCH

Next: !p161, !f162

CH OVERHEAT THERMOSTAT

REMOVE WHITE LEADS FROM OVERHEAT THERMOSTAT

Next: !p125, !f18

MODUREG VOLTAGE

BOILER SWITCH IN ON

Next: !p218, f191

INSPECTION FAN VENTURI

REMOVE THE FAN VENTURI, TOP OF HEAT EXCHANGER
AND SIDE OF FAN ASSEMBLY

Next: p180, !f181

AIR PRESSURE SWITCH TUBES

Next: p182, !f183

INSPECTION FAN ASSEMBLY

REMOVE FAN ASSEMBLY FROM BOILER

Next: p184, !f185

HEAT EXCHANGER INSPECTION

Next: p186, !f187

FLUE INSPECTION

Next: !p188, !f189

DHW POTENTIOMETER

TURN/SET THE HOT WATER CONTROL (POTENTIOMETER) TO APPROXIMATELY MID POSITION

Next: !p194, !f195

GV2 MAIN SOLENOID VOLTAGE

{GAINPCBACS}
BOILER SWITCH IN ON POSITION
CENTRAL HEATING SWITCH IN OFF (CENTRAL) POSITION

Next: !p200, f201

INSPECTION TUBES AIR PRESSURE

Next: p204, !f205

INSPECTION FAN VENTURI

REMOVE THE FAN VENTURI, TOP OF HEAT EXCHANGER
AND SIDE OF FAN ASSEMBLY

Next: p206, !f207

INSPECTION FAN ASSEMBLY

REMOVE FAN ASSEMBLY FROM BOILER

Next: p208, !f209

FLUE INSPECTION

Next: !p210, !f211

MODULATION BOARD VOLTAGE

LOWER FRONT FASCIA PANEL

Next: p29, !f28

GV3 MODULATING SOLENOID VOLTAGE

BOILER SWITCH IN ON

Next: !p231, f232

DHW POTENTIOMETER

TURN/SET THE HOT WATER CONTROL (POTENTIOMETER) TO APPROXIMATELY MID POSITION

Next: !p235, !f236

AIR PRESSURE SWITCH TEST

DISCONNECT LEADS FRO

Next: p250, !f262

DHW LIMIT THERMOSTAT

REMOVE PURPLE WIRES FROM DHW LIMIT THERMOSTAT

Next: p283, !f263

NTC - CH RESISTANCE

Next: !p275, !f276

PUMP LIMPET TEST

Next: p271, !f272

NTC - CH RESISTANCE

Next: p327, !f274

DHW TEMPERATURE SENSOR

Next: p179, !f295

DISPLAY BOARD CABLE

VISUAL AND MECHANICAL SOUNDNESS CHECK OF THE CONNECTIONS.

Next: !p127, !f30

RESISTANCE FAN

DISCONNECT INLINE CONNECTOR FOR THE PUMP

Next: p300, !f301

RESISTANCE GAS VALVE OPERATING SOLENOID

REMOVE PLUG FROM THE

Next: p302, !f303

RESISTANCE GAS VALVE MOD SOLENOID

DISCONNECT SPADE CONNECTORS FROM MODULATING SOLENOID

Next: p304, !f305

RESISTANCE TRANSFORMER

DISCONNECT CONNECTOR PL6 AT THE PCB

Next: p324, !f307

MAINS POWER SUPPLY

LOWER CONTROL PANEL (HINGED)

Next: p313, f314

TRANSFORMER INPUT (240 VOLTS)

Next: !p317, !f318

RESISTANCE WATER PRESSURE SWITCH TO EARTH

REMOVE BOTH YELLOW LEADS FROM WATER PRESSURE SWITCH

Next: !p325, !f326

DIVERTER VALVE OPERATION

TURN OFF THE MAINS W

Next: !p328, !f329

WATER PRESSURE SWITCH

REMOVE BOTH YELLOW LEADS FROM WATER PRESSURE SWITCH

Next: !p36, !f35

DHW DEMAND SWITCH

REMOVE BOTH ORANGE WIRES FROM DHW DEMAND SWITCH

Next: !p49, !f48

AIR PRESSURE SWITCH NO AIR

REMOVE ORANGE AND PURPLE WIRES FROM AIR PRESSURE SWITCH

Next: p56, !f55

DHW LIMIT THERMOSTAT

REMOVE PURPLE WIRES FROM DHW LIMIT THERMOSTAT

Next: p58, !f57

DISPLAY BOARD CABLE

VISUAL AND MECHANICAL SOUNDNESS CHECK OF THE CONNECTIONS.

Next: p60, !f59

NTC - DHW RESISTANCE

Next: !p62, !f61

BOILER SWITCH

CENTRAL HEATING SWITCH IN CONSTANT POSITION
BOILER SWITCH IN ON POSITION

Next: !p102, !f101

ROOM THERMOSTAT (VOLTAGE INPUT)

CENTRAL HEATING SWITCH IN CONSTANT POSITION
ROOM THERMOSTAT CALLING FOR HEAT

Next: !p100, !f99

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