XSol Diagnostic System

VOKERA 20 / 80 R.S. FLOWMATIC.

GC NUMBER 47 094 07<

Next: &18, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

HOT WATER

DHW THERMOSTAT TO MAX
MODE SELECTOR SWITCH TO SUMMER
HOT WATER TAP ON

Next: &nff, ?98, ?100

DHW MODULATION

{ISOLATEMAINSPOWER}<

Next: &1, f95

DHW HIGH FLAME

{ISOLATEMAINSPOWER}<

Next: &2, f92

DHW FAN HIGH SPEED

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO SUMMER
TURN HOT WATER TAP ON

Next: &3, f89

HW DEMAND

{ISOLATEMAINSPOWER}

Next: &4, f84

PUMP OVERRUN

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: &5, !f83

CENTRAL HEATING

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT
HEATING THERMOSTAT TO MAX

Next: &6, ?79, ?81

CH MODULATION

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT
HEATING THERMOSTAT TO MAX

Next: &7, f76

CH LOW FLAME

{ISOLATEMAINSPOWER}<

Next: &8, f71

CH HIGH FLAME

{ISOLATEMAINSPOWER}<

Next: &9, ?49, ?51

CH FAN HIGH SPEED

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: &10, f370

SLOW FAN

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO SUMMER

Next: &11, f19

PILOT FLAME FAILURE

{ISOLATEMAINSPOWER}

Next: &12, !f18

PILOT ESTABLISHED

{ISOLATEMAINSPOWER}

Next: &13, f13

IGNITE PILOT

{ISOLATEMAINSPOWER}

Next: &14, f10

SYSTEM CHECKS.

{ISOLATEMAINSPOWER}

Next: &115, !f2

VOKERA 20 / 80 R.S. FLOWMATIC

{ISOLATEMAINSPOWER}<

Next: &17, !f1

ELECTRODE SPARKING

{ISOLATEMAINSPOWER}

Next: &15, f116

ELECTRICAL SAFETY CHECKS

Next: End

PILOT BURNER ASSEMBLY

Next: End

PIEZO SPARK UNIT EARTH

EARTH FOR PIEZO IGNITER

Next: End

ELECTRODE LEAD

SPARK ELECTRODE LEAD

Next: End

THERMOCOUPLE

Next: End

HIGH LIMIT THERMOSTAT

Next: End

PILOT FLAME FAILURE

GAS VALVE

Next: End

SYSTEM CHECKS

Next: End

MAINS POWER SUPPLY

Next: End

ON / OFF SWITCH

Next: End

NO HIGH FLAME

PRINTED CIRCUIT BOARD

Next: End

FLOW SWITCH SPINDLE

Next: End

SAFETY THERMOSTAT

Next: End

GAS VALVE COIL

GAS VALVE COIL/SOLENOID

Next: End

CH HIGH FLAME

AIR TUBE

Next: End

NO FLAME

VENTURI

Next: End

CH HIGH FLAME

FAN (CONDITION)

Next: End

FAN SPEED RESISTOR (560 OHM)

SLOW FAN SPEED RESISTOR (560 OHM)

Next: End

CH HIGH FLAME

FLUE

Next: End

NO POWER

PRINTED CIRCUIT BOARD

Next: End

SLOW FAN

FLOW SWITCH MICROSWITCH

Next: End

HEATING CONTROL SWITCH

Next: End

BOILER THERMOSTAT

Next: End

DC POWER SUPPLY

PRINTED CIRCUIT BOARD

Next: End

CH RELAY 1 NORMALLY OPEN VOLTAGE

PRINTED CIRCUIT BOARD

Next: End

NO POWER TO PUMP

PRINTED CIRCUIT BOARD

Next: End

LOW FLAME

BOILER THERMOSTAT

Next: End

DOMESTIC HOT WATER MICROSWITCH

Next: End

MODULATION COIL

GAS VALVE MODULATION COIL

Next: End

CH MODULATION

VENTURI

Next: End

PUMP OVVERRUN

BOILER THERMOSTAT

Next: End

FILTER (COLD WATER INLET)

Next: End

DIVERTER VALVE DIAPHRAGM

DOMESTIC HOT WATER DIAPHRAGM

Next: End

DHW FAN HIGH SPEED (FAIL)

DOMESTIC HOT WATER MICROSWITCH

Next: End

DOMESTIC HOT WATER THERMOSTAT

Next: End

DHW MODULATION

DOMESTIC HOT WATER THERMOSTAT

Next: End

DIVERTER VALVE

THREE PORT DIVERTER VALVE

Next: End

CH MODULATION

BOILER THERMOSTAT

Next: End

PIEZO IGNITOR

PIEZO SPARK UNIT

Next: End

IGNITE PILOT

GAS VALVE

Next: End

SPARK ELECTRODE

Next: End

HW DEMAND

PRINTED CIRCUIT BOARD

Next: End

PILOT ESTABLISHED

GAS VALVE

Next: End

SLOW FAN

PRINTED CIRCUIT BOARD

Next: End

BURNER

Next: End

NO FLAME

GAS VALVE

Next: End

NO FLAME

AIR PRESSURE SWITCH

Next: End

FLUE VENTURI

VENTURI

Next: End

NOT LIGHTING

GAS VALVE

Next: End

FAN

Next: End

ROOM THERMOSTAT CONNECTIONS

Next: End

AIR PRESSURE SWITCH

Next: End

CH RELAY 1 NORMALLY OPEN VOLTAGE

FLOW SWITCH MICROSWITCH

Next: End

PUMP

Next: End

SPLIT

DIAPHRAGM CH FLOW SWITCH

Next: End

LOW FLAME

PRINTED CIRCUIT BOARD

Next: End

CH LOW FLAME

GAS VALVE

Next: End

PRIMARY HEAT EXCHANGER

Next: End

SYSTEM FAULT

Next: End

DIVERTER VALVE SPINDLE

Next: End

DHW HIGH FLAME

DOMESTIC HOT WATER MICROSWITCH

Next: End

DHW MODULATION

DOMESTIC HOT WATER MICROSWITCH

Next: End

SECONDARY HEAT EXCHANGER

Next: End

HOT RADIATORS

CHARACTERISTIC TEST FROM HOT WATER.

Next: !p101

LOW FLAME

CHARACTERISTIC TEST FROM CH HIGH FLAME.

Next: p50

NO FLAME

CHARACTERISTIC TEST FROM CH HIGH FLAME.

Next: p52

NOISILY

CHARACTERISTIC TEST FROM CENTRAL HEATING.

Next: !p80

QUIETLY

CHARACTERISTIC TEST FROM CENTRAL HEATING.

Next: !p82

COLD RADIATORS

CHARACTERISTIC TEST FROM HOT WATER.

Next: !p99

27/11/2017 10:02:50 1709_1_50_1 09/01/2018 08:45:50

27/11/2017 13:10:41

Next: End

PILOT INJECTOR BLOCKED

{ISOLATEMAINSPOWER}

Next: !p12, !f11

PIEZO EARTH CHECK

{ISOLATEMAINSPOWER}

Next: p117, !f118

ELECTRODE LEAD/ ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p121, !f122

THERMOCOUPLE VOLTAGE

{ISOLATEMAINSPOWER}

Next: p15, !f14

RELAY 1 NORMALLY CLOSED CHECK

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO SUMMER

Next: p21, f20

MAINS POWER SUPPLY

ON/OFF SWITCH IN OFF POSITION

Next: p23, !f22

VOLTAGE AIR PRESSURE SWITCH COMMON

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: p273, !f248

GAS VALVE SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT AND REMOVE WIRES FROM SOLENOID BEFORE TESTING.

Next: !p271, !f272

VOLTAGE AIR PRESSURE SWITCH COMMON

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: !p285, !f286

CH - AIR PRESSURE SWITCH NORMALLY CLOSED

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: p371, f372

ROOM THERMOSTAT/LINK VOLTAGE

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: p373, f374

SELECTOR SWITCH IN CONSTANT POSITION

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT
HEATING THERMOSTAT TO MAX

Next: !p375, !f376

CH PUMP RUNS

Next: !p392, f388

VOLTAGE CH PUMP

Next: !p389, !f391

AIR PRESSURE SWITCH NORMALLY OPEN VOLTAGE

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: !p291, f284

DHW MICROSWITCH NORMALLY CLOSED CHECK

{ISOLATEMAINSPOWER}
ON/OFF SWITCH IN OFF POSITION

Next: p73, !f72

BLOCKED VENTURI

{ISOLATEMAINSPOWER}

Next: !p103, !f77

DHW FILTER

{ISOLATEMAINSPOWER}

Next: p86, !f85

RESISTANCE DHW MICROSWITCHES

{ISOLATEMAINSPOWER}

Next: !p123, !f90

DHW THERMOSTAT RESISTANCE (COLD)

{ISOLATEMAINSPOWER}

Next: !p94, !f93

DHW THERMOSTAT RESISTANCE (MODULATING)

{ISOLATEMAINSPOWER}
ENSURE THAT THE BOILER IS AT ITS FULL OPERATING TEMPERATURE

Next: !p97, !f96

ELECTRODE LEAD AND ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p119, f120

HIGH LIMIT THERMOSTAT CONTINUITY

{ISOLATEMAINSPOWER}

Next: !p17, !f16

FLOW SWITCH SPINDLE

{ISOLATEMAINSPOWER}
REMOVE PLASTIC COVER FROM FLOWSWITCH

Next: p27, !f26

ON/OFF SWITCH OPERATION

ON/OFF SWITCH IN ON POSITION

Next: !p25, !f24

SAFETY THERMOSTAT RESISTANCE

{ISOLATEMAINSPOWER}

Next: p267, !f268

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p269, f270

FAN SPEED (560 OHM) RESISTOR

{ISOLATEMAINSPOWER}

Next: p29, !f28

APS TUBES

{ISOLATEMAINSPOWER}

Next: p274, !f275

BLOCKED VENTURI

{ISOLATEMAINSPOWER}

Next: p276, !f277

FAN CONDITION

{ISOLATEMAINSPOWER}
REMOVE FAN ASSEMBLY

Next: p278, !f279

BLOCKED FLUE.

Next: !p280, !f281

SLOW FAN VOLTAGE

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO SUMMER

Next: !p31, !f30

CH FLOW SWITCH MICROSWITCH

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: p379, f387

BOILER THERMOSTAT 2ND. STAGE

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: !p377, !f378

DC POWER SUPPLY

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT
HEATING THERMOSTAT TO MAX

Next: p383, !f384

CH RELAY 1 NORMALLY OPEN VOLTAGE

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT
HEATING THERMOSTAT TO MAX

Next: !p385, !f386

MODUREG SOLENOID SLUG FAILURE

{ISOLATEMAINSPOWER}<

Next: p54, f53

AIR PRESSURE SWITCH NORMALLY OPEN VOLTAGE

ON/OFF SWITCH IN ON POSITION
MODE SELECTOR SWITCH TO CONSTANT

Next: p266, f238

BOILER THERMOSTAT (COLD) RESISTANCE

{ISOLATEMAINSPOWER}
ENSURE THAT THE BOILER IS NOT AT ITS FULL OPERATING TEMPERATURE

Next: !p58, !f57

MODULATION COIL RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT WIRES FROM THE MODULATION COIL

Next: !p75, !f74

DIVERTER VALVE DIAPHRAGM.

{ISOLATEMAINSPOWER}

Next: !p88, !f87

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