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:

VAILLANT VCW 20/1 T3 WH

WARNING - IMPORTA

Next: &17, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

FLUE

Next: &nff, !f18

WATER PRESSURE RISE

BOILER ON/OFF SWITCH

Next: &1, !f155

CENTRAL HEATING OPERATION

BOILER ON/OFF SWITCH

Next: &2, ?125, ?127, ?129, ?131

HOT WATER

BOILER ON/OFF SWITCH ON
CH SWITCH OFF
DHW SWITCH IN INSTANT POSITION

Next: &3, ?110, ?112, ?114

CH BURNER MODULATION

BOILER ON/OFF SWITCH

Next: &4, f95

CH BURNER IGNITES

BOILER ON/OFF SWITCH

Next: &5, f92

CH PUMP FLOW VALVE OPERATION

BOILER ON/OFF SWITCH

Next: &6, f87

DHW DIVERTER VALVE MICROSWITCH 2 RESISTANCE

{ISOLATEMAINSPOWER}

Next: &7, !f86

DHW PUMP FLOW VALVE OPERATION

BOILER ON/OFF SWITCH OFF
CH SWITCH OFF
DHW SWITCH IN INSTANT POSITION

Next: &68, f61

PUMP RUNS

BOILER ON/OFF SWITCH

Next: &10, f34

PILOT FLAME FAILURE

{ISOLATEMAINSPOWER}

Next: &11, !f33

PILOT ESTABLISHES

{ISOLATEMAINSPOWER}

Next: &12, f30

PILOT IGNITES

{ISOLATEMAINSPOWER}

Next: &13, f27

DHW FLOW RATE

{ISOLATEMAINSPOWER}

Next: &14, f22

SYSTEM CHECKS

{ISOLATEMAINSPOWER}

Next: &15, !f20

VAILLANT VCW 20/1 T3 WH

G.C. NUMBER 47 044 0

Next: &16, !f19

DHW BURNER HIGH FLAME

BOILER ON/OFF SWITCH ON
CH SWITCH OFF
DHW SWITCH IN INSTANT POSITION

Next: &8, f69

CH BURNER MODULATION

DIVERTER VALVE

Next: End

CH BURNER MODULATION

SENSOR

Next: End

CH BURNER MODULATION

SOLENOID

Next: End

PUMP RUNS

OVERHEAT THERMOSTAT

Next: End

WATER PRESSURE RISE

EXPANSION VESSEL

Next: End

FLUE

FLUE

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL CHECKS

Next: End

SYSTEM CHECKS

SYSTEM CHECKS

Next: End

DHW FLOW RATE

DHW INLET FILTER

Next: End

DHW FLOW RATE

DHW FLOW RESTRICTOR

Next: End

PILOT IGNITES

PILOT INJECTOR

Next: End

PILOT ESTABLISHES

THERMOCOUPLE

Next: End

PILOT FLAME FAILURE

PILOT VALVE

Next: End

PUMP RUNS

FUSES

Next: End

PUMP RUNS

MAINS POWER

Next: End

PUMP RUNS

DIVERTER VALVE

Next: End

PUMP RUNS

WATER VALVE DIAPHRAGM

Next: End

CH SWITCH OUTPUT VOLTAGE (CH OFF)

SWITCH PCB

Next: End

PUMP RUNS

PILOT MICROSWITCH

Next: End

DHW PUMP FLOW VALVE OPERATION

PUMP FLOW VALVE PIPES

Next: End

DHW PUMP FLOW VALVE OPERATION

VENTURI

Next: End

DHW PUMP FLOW VALVE OPERATION

PUMP FLOW VALVE DIAPHRAGM

Next: End

DHW BURNER HIGH FLAME

DIVERTER VALVE MICROSWITCHES

Next: End

DHW BURNER HIGH FLAME

SENSOR

Next: End

DHW BURNER HIGH FLAME

PCB FUSE

Next: End

DHW BURNER HIGH FLAME

WATER VALVE MICROSWITCH

Next: End

DHW BURNER HIGH FLAME

PILOT MICROSWITCH

Next: End

DHW BURNER HIGH FLAME

SOLENOID

Next: End

DHW DIVERTER VALVE MICROSWITCH 2 RESISTANCE

DIVERTER VALVE MICROSWITCHES

Next: End

CH PUMP FLOW VALVE OPERATION

SWITCH PCB

Next: End

CH PUMP FLOW VALVE OPERATION

Next: End

CH BURNER IGNITES

DIVERTER VALVE MICROSWITCHES

Next: End

CH BURNER MODULATION

WAX CAPSULE

Next: End

CH BURNER MODULATION

CONTROL PCB

Next: End

CH BURNER MODULATION

GAS VALVE

Next: End

DHW QUIET OPERATION, RADIATORS COLD

SECONDARY HEAT EXCHANGER

Next: End

HOT WATER

DIVERTER VALVE

Next: End

CENTRAL HEATING OPERATION

SYSTEM CHECKS

Next: End

CH NOISY HEAT EXCHANGER, DHW PREVIOUSLY QUIET

Next: End

CENTRAL HEATING OPERATION

DIVERTER VALVE

Next: End

CH QUIET OPERATION, FLOW HOT

Next: End

HOT WATER

PRIMARY HEAT EXCHANGER

Next: End

CH NOISY HEAT EXCHANGER, DHW PREVIOUSLY QUIET

SECONDARY HEAT EXCHANGER

Next: End

CH QUIET OPERATION, FLOW COLD

SECONDARY HEAT EXCHANGER

Next: End

CH PUMP FLOW VALVE OPERATION

OVERRUN SWITCH CONNECTION

Next: End

CH QUIET OPERATION, FLOW HOT

SECONDARY HEAT EXCHANGER

Next: End

CENTRAL HEATING OPERATION

SECONDARY HEAT EXCHANGER

Next: End

DHW FLOW RATE

SECONDARY HEAT EXCHANGER

Next: End

PILOT IGNITES

PILOT VALVE

Next: End

PILOT ESTABLISHES

MAG VALVE

Next: End

ON/OFF SWITCH OUTPUT VOLTAGE

SWITCH PCB

Next: End

PUMP RUNS

WAX CAPSULE

Next: End

PUMP RUNS

DIVERTER VALVE MICROSWITCHES

Next: End

PUMP RUNS

WATER VALVE MICROSWITCH

Next: End

PUMP RUNS

WATER VALVE

Next: End

PUMP RUNS

PUMP

Next: End

DHW PUMP VOLTAGE

SWITCH PCB

Next: End

DHW PUMP FLOW VALVE OPERATION

PUMP FLOW VALVE

Next: End

DHW BURNER HIGH FLAME

CONTROL PCB

Next: End

DHW BURNER HIGH FLAME

BURNER INJECTORS

Next: End

DHW BURNER HIGH FLAME

GAS VALVE

Next: End

CH BURNER IGNITES

SOLENOID MICROSWITCH

Next: End

CH BURNER MODULATION

DIVERTER VALVE MICROSWITCHES

Next: End

DHW NOISY HEAT EXCHANGER

CHARACTERISTIC TEST FROM HOT WATER

Next: p133

DHW QUIET OPERATION, RADIATORS COLD

CHARACTERISTIC TEST FROM HOT WATER

Next: !p113

DHW QUIET OPERATION, RADIATORS WARM

CHARACTERISTIC TEST FROM HOT WATER

Next: !p115

CH NOISY HEAT EXCHANGER, DHW PREVIOUSLY NOISY HEAT EXCHANGER

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p126

CH NOISY HEAT EXCHANGER, DHW PREVIOUSLY QUIET

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p128

CH QUIET OPERATION, FLOW COLD

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p130

CH QUIET OPERATION, FLOW HOT

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p132

CH NOISY HEAT EXCHANGER, DHW PREVIOUSLY NOISY HEAT EXCHANGER

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p140

CH NOISY HEAT EXCHANGER, DHW PREVIOUSLY QUIET

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p142

CH QUIET OPERATION, FLOW COLD

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p144

CH QUIET OPERATION, FLOW HOT

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p150

03/07/2012 12:15:17 4_1_50_1 10/01/2013 13:09:43

01/08/2012 12:17:03

Next: End

SENSOR MODULATION RESISTANCE

{ISOLATEMAINSPOWER}
ENSURE THE BOILER HAS REACHED ITS FULL OPERATING TEMPERATURE

Next: !p107, !f106

DHW INLET FILTER

{ISOLATEMAINSPOWER}
WATER OFF

Next: p24, !f23

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: !p29, !f28

THERMOCOUPLE MILLIVOLTAGE

{ISOLATEMAINSPOWER}

Next: !p32, !f31

DHW DIVERTER VALVE MICROSWITCH 1 OUTPUT VOLTAGE

BOILER ON/OFF SWITCH

Next: p36, f35

ON/OFF SWITCH OUTPUT VOLTAGE

BOILER ON/OFF SWITCH ON
CH SWITCH OFF
DHW SWITCH IN INSTANT POSITION

Next: p38, f37

FUSES 2 AMP

{ISOLATEMAINSPOWER}

Next: p40, !f39

DHW DIVERTER VALVE CLOSES

{ISOLATEMAINSPOWER}<

Next: !p46, !f45

WATER VALVE OPERATION

{ISOLATEMAINSPOWER}

Next: !p52, f51

WATER VALVE DIAPHRAGM

{ISOLATEMAINSPOWER}
WATER OFF

Next: !p54, !f53

PILOT MICROSWITCH 1 RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p60, !f59

PUMP FLOW VALVE PIPES

{ISOLATEMAINSPOWER}
DRAIN AND DISCHARGE BOILER

Next: p63, !f62

DHW GAS VALVE VOLTAGE

BOILER ON/OFF SWITCH ON
CH SWITCH OFF
DHW SWITCH IN INSTANT POSITION

Next: p71, f70

DHW DIVERTER VALVE MICROSWITCH 2 OPERATION

{ISOLATEMAINSPOWER}

Next: p73, !f72

SOLENOID OPERATION

BOILER ON/OFF SWITCH

Next: !p85, !f84

CH SWITCH OUTPUT VOLTAGE (CH ON)

BOILER ON/OFF SWITCH

Next: p89, !f88

CH DIVERTER VALVE MICROSWITCH OPERATION

{ISOLATEMAINSPOWER}<

Next: !p94, !f93

CH DIVERTER VALVE MICROSWITCH 2 RESISTANCE

{ISOLATEMAINSPOWER}<

Next: p97, f96

CH DIVERTER VALVE OPERATION

BOILER ON/OFF SWITCH

Next: !p99, f98

CH DIVERTER VALVE OPEN

{ISOLATEMAINSPOWER}<

Next: !p101, !f100

SOLENOID OPERATION

BOILER ON/OFF SWITCH

Next: !p109, !f108

CENTRAL HEATING OPERATION

BOILER ON/OFF SWITCH

Next: !p153, ?139, ?141, ?143, ?149

DHW FLOW RESTRICTOR

{ISOLATEMAINSPOWER}
WATER OFF

Next: !p26, !f25

DHW WATER VALVE MICROSWITCH RESISTANCES

{ISOLATEMAINSPOWER}

Next: p50, f49

DHW DIVERTER VALVE OPERATION

{ISOLATEMAINSPOWER}
REMOVE DIVERTER VALVE MICROSWITCH COVER

Next: p44, f43

MAINS POWER SUPPLY

BOILER ON/OFF SWITCH OFF

Next: !p42, !f41

OVERHEAT THERMOSTAT RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p48, !f154

CH SWITCH OUTPUT VOLTAGE (CH OFF)

BOILER ON/OFF SWITCH

Next: p56, !f55

DHW PUMP VOLTAGE

BOILER ON/OFF SWITCH

Next: !p58, f57

VENTURI

{ISOLATEMAINSPOWER}
BOILER DRAINED AND DISCHARGED

Next: p65, !f64

PUMP FLOW VALVE DIAPHRAGM

{ISOLATEMAINSPOWER}
BOILER DRAINED AND DISCHARGED

Next: !p67, !f66

DHW BURNER GAS PRESSURE

BOILER ON/OFF SWITCH

Next: !p83, f82

SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
ENSURE BOILER IS COOL

Next: p75, !f74

PCB FUSE

{ISOLATEMAINSPOWER}

Next: p77, !f76

DHW WATER VALVE MICROSWITCH RESISTANCES

{ISOLATEMAINSPOWER}

Next: p79, !f78

PILOT MICROSWITCH 2 RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p81, !f80

ROOM THERMOSTAT OUTPUT VOLTAGE

BOILER ON/OFF SWITCH ON
CH SWITCH ON
DHW SWITCH IN INSTANT POSITION

Next: !p148, !f90

CH MODULATION VOLTAGE

BOILER ON/OFF SWITCH

Next: p105, f104

System Information

Total Tests: 132

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control