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:

APPLIANCE APPEARS SATISFACTORY

Next: nff

OBSERVE PUMP RUNNING

BOILER ON
SELECTOR LEVER RIGHT - CH/HW POSITION
SYSTEM CALLING FOR HEAT
CLOCK ON

Next: &146, f35

TEST HOT WATER TEMPERATURE

BOILER ON
SELECTOR LEVER LEFT - HW POSITION

Next: &8, ?31, ?33

TEST BOILER LIGHTS UP

BOILER ON
SELECTOR LEVER LEFT - HW POSITION

Next: &9, f29

CHECK FAN SLOW SPEED

{ISOLATEMAINSPOWER}
REMOVE FRONT PANEL
BOILER ON
SYSTEM CALLING FOR HEAT

Next: &12, f163

ESTABLISH FLAME

BOILER ON
SYSTEM CALLING FOR HEAT

Next: &13, f25

OBSERVE PILOT IGNITION

BOILER ON
SYSTEM CALLING FOR HEAT

Next: &14, ?19, ?21, ?23

SAUNIER DUVAL SD 623

{ISOLATEMAINSPOWER}<

Next: &150, !f17

CENTRAL HEATING RESPONSE

BOILER ON
SELECTOR LEVER RIGHT - CH/HW POSITION
SYSTEM CALLING FOR HEAT
CLOCK ON

Next: &nff, f147

SYSTEM CHECKS

PLEASE ENSURE THE FOLLOWING SYSTEM CHECKS ARE COMPLETED

Next: &15, !f151

MICROSWITCH ASSEMBLY (SW 1)

MICROSWITCH ASSEMBLY

Next: End

CENTRAL HEATING RESPONSE

MICROSWITCH ASSEMBLY

Next: End

SYSTEM CHECKS

SYSTEM CHECKS

Next: End

OBSERVE PILOT IGNITION

PUSH BUTTON

Next: End

NO SPARKING AT ALL

SPARK GENERATOR LEADS

Next: End

OBSERVE PILOT IGNITION

TUBE - C/W ELECTRODE - PILOT BURNER

Next: End

NO POWER TO FAN

PCB

Next: End

CHECK FAN SLOW SPEED

FAN RESISTOR REPLACEMENT

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

OBSERVE PUMP RUNNING

PCB

Next: End

TEST VOLTAGE SWITCHING

CLOCK

Next: End

ESTABLISH FLAME

KLIXON

Next: End

ESTABLISH FLAME

THERMOCOUPLE / INTERRUPTOR - SPECIAL

Next: End

WATER VALVE RESPONSE

WATER VALVE - SPECIAL

Next: End

SPARKING OCCURS IMMEDIATELY

PCB

Next: End

OBSERVE PILOT IGNITION

BAYONET CONNECTOR

Next: End

NORMAL FAN SPEED

KIT - AIR PRESSURE SWITCH

Next: End

NORMAL FAN SPEED

PACK - FUSES 80MA 5 OFF - PCB

Next: End

NORMAL FAN SPEED

SWITCH - WATER PRESSURE

Next: End

TEST BOILER LIGHTS UP

FLUE SYSTEM

Next: End

TEST BOILER LIGHTS UP

GAS VALVE - NG

Next: End

TEST BOILER LIGHTS UP

KIT - AIR PRESSURE SWITCH

Next: End

TEST BOILER LIGHTS UP

MICROSWITCH ASSEMBLY

Next: End

NORMAL FAN SPEED

PCB

Next: End

MICROSWITCH ASSEMBLY (SW 2)

MICROSWITCH ASSEMBLY

Next: End

CENTRAL HEATING RESPONSE

THERMOSTAT - SPECIAL

Next: End

NO SPARK AT ALL

PCB

Next: End

OBSERVE PILOT IGNITION

SPARK GENERATOR - SPECIAL

Next: End

OBSERVE PILOT IGNITION

PACK - INJECTORS 20 OFF - PILOT - NG

Next: End

CHECK FAN SLOW SPEED

FAN

Next: End

TEST HOT WATER TEMPERATURE

GREASE THERMISTOR

Next: End

TEST HOT WATER TEMPERATURE

HEAT EXCHANGER

Next: End

OBSERVE PUMP RUNNING

PUMP

Next: End

ESTABLISH FLAME

SOLENOID - THERMOCOUPLE

Next: End

WATER VALVE RESPONSE

KIT - DIFFERENTIAL VALVE

Next: End

SPARKING OCCURS IMMEDIATELY

SPARK GENERATOR LEADS

Next: End

OBSERVE PILOT IGNITION

GAS SUPPLY

Next: End

NORMAL FAN SPEED 2

PCB

Next: End

TEST BOILER LIGHTS UP

THERMISTOR - HIGH LIMIT - VIOLET

Next: End

TEST BOILER LIGHTS UP

THERMISTOR ORANGE SPOT - HOT WATER

Next: End

TEST BOILER LIGHTS UP

PCB

Next: End

SPARKING OCCURS IMMEDIATELY

CHARACTERISTIC TEST FROM OBSERVE PILOT IGNITION

Next: p20

NO SPARKING AT ALL

CHARACTERISTIC TEST FROM OBSERVE PILOT IGNITION

Next: p152

SPARKING OCCURS, BUT THERE IS NO FLAME

CHARACTERISTIC TEST FROM OBSERVE PILOT IGNITION

Next: p24

BOILER LIGHTS, BUT DROPS BACK TO A LOW FLAME

CHARACTERISTIC TEST FROM TEST HOT WATER TEMPERATURE

Next: !p32

BOILER IS VERY NOISY WITH A POOR HW FLOW RATE

CHARACTERISTIC TEST FROM TEST HOT WATER TEMPERATURE

Next: !p34

11/12/2019 08:41:29 1911_1_50_1 06/01/2020 14:30:12

11/12/2019 11:45:40

Next: End

RESISTANCE OF MICROSWITCH SW3

{ISOLATEMAINSPOWER}

Next: !p148, !f149

ON SWITCH VOLTAGE TEST

Next: !p155, !f156

RESISTANCE FAN RESISTOR

{ISOLATEMAINSPOWER}
REMOVE THE WIRES FROM THE FAN RESISTOR

Next: p165, !f169

OVERHEAT THERMOSTAT (KLIXON) TEST

{ISOLATEMAINSPOWER}

Next: p40, !f39

WATER VALVE DIAPHRAGM CHECK

{ISOLATEMAINSPOWER}
REMOVE WATER VALVE AND STRIP

Next: !p46, !f45

PCB DC VOLTAGE MEASUREMENT

SELECTOR LEVER HW POSITION

Next: p64, f63

CENTRAL HEATING THERMISTOR OPERATION

{ISOLATEMAINSPOWER}<

Next: !p78, f77

PUMP VOLTAGE MEASUREMENT

{ISOLATEMAINSPOWER}<

Next: !p37, !f36

BAYONET FITTING CHECK

{ISOLATEMAINSPOWER}

Next: !p60, !f59

MICROSWITCH SW2 CONTINUITY CHECK

{ISOLATEMAINSPOWER}<

Next: p66, f65

RESISTANCE OF MICROSWITCH SW1

{ISOLATEMAINSPOWER}

Next: !p145, !f144

DOMESTIC HOT WATER THERMISTOR TEST

{ISOLATEMAINSPOWER}<

Next: !p80, f79

AIR PRESSURE SWITCH RESISTANCE CHECK

{ISOLATEMAINSPOWER}

Next: p82, !f89

SPARK GENERATOR INPUT

{ISOLATEMAINSPOWER}
REMOVE LEADS FROM INPUT TO SPARK GENERATOR

Next: p153, f154

SPARK GENERATOR LEADS

{ISOLATEMAINSPOWER}
REMOVE CASE AND FRONT PANEL

Next: p157, !f158

ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p159, !f160

FAN RESISTOR VOLTAGE

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

Next: !p166, !f168

SPARK GENERATOR INPUT

{ISOLATEMAINSPOWER}
REMOVE LEADS FROM INPUT TO SPARK GENERATOR

Next: !p48, !f47

MEASURE GAS SUPPLY PRESSURE

{ISOLATEMAINSPOWER}
ATTACH GAUGE TO INLET PRESSURE TEST POINT

Next: !p162, f57

THERMOCOUPLE VOLTAGE

{ISOLATEMAINSPOWER}

Next: !p42, !f41

AIR PRESSURE SWITCH RESISTANCE

{ISOLATEMAINSPOWER}<

Next: !p143, !f67

FUSE RESISTANCE CHECK

{ISOLATEMAINSPOWER}
REMOVE CONTROL PANEL COVER TO REVEAL PCB

Next: p72, !f71

RESISTANCE OF WATER PRESSURE SWITCH

{ISOLATEMAINSPOWER}

Next: !p76, !f75

BLOCKED FLUE PIPE

Next: p84, !f83

RESISTANCE OF MICROSWITCH SW3

{ISOLATEMAINSPOWER}

Next: p86, !f91

GAS VALVE SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p88, !f87

System Information

Total Tests: 87

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control