XSol Diagnostic System

Interactive Test Sequence Navigator

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:

WORCESTER HIGHFLOW 400 BF LPG

G.C. NUMBER 47 311 2

Next: &16, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

COOLING FAN

{GAINPCBACS}
HEAT

Next: &232, ?172, ?174

CH SATISFIED

HEATING TEMPERATURE SELECTOR TO MID-RANGE
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: &2, !f170

SYSTEM PRESSURE RISE

HEATING TEMPERATURE SELECTOR TO MAXIMUM
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: &3, !f169

DHW OPERATION

HEATING TEMPERATURE

Next: &219, ?143, ?145, ?147, ?149

HEATBANK SATISFIED

PROGRAMMER OR SELECT

Next: &6, ?125, ?127, ?129, ?131

BURNER IGNITION (CH DEMAND)

HEATING TEMPERATURE SELECTOR TO MAXIMUM
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: &201, f99

DHW MAXIMUM PRESSURE

ATTACH U-GAUGE TO BU

Next: &9, f94

BURNER IGNITION (HEATBANK)

HEATING TEMPERATURE

Next: &10, f73

PUMP RUNS

HEATING TEMPERATURE

Next: &11, f59

DHW FLOW RATE

Next: &12, f53

PILOT OPERATION

GAS ON

Next: &13, ?20, ?22, ?24, ?26

SYSTEM CHECKS

Next: &14, !f19

WORCESTER HIGHFLOW 400 BF LPG

G.C. NUMBER 47 311 2

Next: &15, !f18

DIVERTER VALVE OPERATION

HEATING TEMPERATURE SELECTOR TO MAXIMUM
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: &7, f202

CH OPERATION

HEATING TEMPERATURE SELECTOR TO MAXIMUM
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: &4, ?220, ?222, ?224, ?259

PUMP OVERRUN

HEATING TEMPERATURE SELECTOR TO MAXIMUM
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: &nff, ?233, ?235

ROOM THERMOSTAT VOLTS IN

SELECTOR SWITCH / PROGRAMMER

Next: End

CH CONTROL THERMOSTAT VOLTS OUT

FLOW SWITCH

Next: End

DHW CONTROL THERMOSTAT (RESISTANCE

THERMOSTAT - RANCO K36P1333 (DHW STAT)

Next: End

PRIMARY HEAT EXCHANGER

HEAT EXCHANGER - GIANNONI

Next: End

BOILER SHUTS DOWN BEFORE DEMANDS ARE SATISFIED

THERMOSTAT - HEATBANK OVERHEAT

Next: End

BOILER SHUTS DOWN BEFORE DEMAND IS SATISFIED

THERMOSTAT - RANCO K36P1333 (DHW STAT)

Next: End

DHW DOES NOT REACH TEMPERATURE

BURNER INJECTOR

Next: End

DHW RUNS COLD OR TAKES TOO LONG TO REFIRE

FLOW SWITCH

Next: End

EXPANSION VESSEL

EXPANSION VESSEL

Next: End

CH SATISFIED

THERMOSTAT - RANCO K36P1332 (CH STAT)

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

COOLING FAN VOLTAGE

KIT - PCB 400 REPLACEMENT

Next: End

OVERHEAT THERMOSTAT (SAFETY TEMPERATURE LIMITER)

THERMOSTAT C/W LEAD ELMWOOD (OVERHEAT)

Next: End

SYSTEM CHECKS

SYSTEM CHECKS

Next: End

PILOT OP THERMOCOUPLE INTERRUPTOR CONS (2) FAIL

OVERHEAT THERMOSTAT (ECO CONNECTIONS)

Next: End

SPARK ELECTRODE

ELECTRODE - IGNITION

Next: End

BURNER IGNITION (CH DEMAND)

THERMOSTAT - RANCO K36P1332 (CH STAT)

Next: End

CH PIPE NOT HEATING

FLOW SWITCH

Next: End

CH PIPE DOES NOT HEAT

THERMOSTAT - RANCO K36P1333 (DHW STAT)

Next: End

FLOW SWITCH (RESISTANCE)

THERMOSTAT - RANCO K36P1333 (DHW STAT)

Next: End

BY-PASS ADJUSTING SCREW

SYSTEM BY-PASS

Next: End

CH OPERATION

SYSTEM BY-PASS

Next: End

NOT ADJUSTED

GAS VALVE

Next: End

RELAY A STICKING

KIT - PCB 400 REPLACEMENT

Next: End

MAIN PCB (VOLTS OUT)

KIT - PCB 400 REPLACEMENT

Next: End

FAN RUNS

SELECTOR SWITCH / PROGRAMMER

Next: End

DIVERTER VALVE

PUMP AND HOUSING

Next: End

DIVERTER VALVE PRESSURE RELIEF PIPE

PIPE 6MM - PRESSURE RELIEF ASSEMBLY

Next: End

HEATBANK SATISFIED - POWER STUCK TO DIVERTER

KIT - PCB 400 REPLACEMENT

Next: End

DHW OPERATION - POWER STUCK TO DIVERTER

KIT - PCB 400 REPLACEMENT

Next: End

NOT ADJUSTED - TOO LOW

GAS VALVE

Next: End

DHW OPERATION

EXTERNAL MIXING

Next: End

CH OP - UP TO TEMP RADS COOL

ISOLATING VALVE 22MM

Next: End

DIVERTER VALVE OPERATION

FILTER - CYLINDRICAL

Next: End

DIVERTER VALVE OPERATION

ISOLATING VALVE 22MM

Next: End

DHW OPERATION - DHW COOL RADS COOL

FILTER - CYLINDRICAL

Next: End

HEATBANK CH HEATS

ISOLATING VALVE 22MM

Next: End

DHW OPERATION

ISOLATING VALVE 22MM

Next: End

COIL 230V AC - DIVERTER VALVE

COIL 230V AC - DIVERTER VALVE

Next: End

PUMP OVERRUN LED STUCK ON

KIT - PCB 400 REPLACEMENT

Next: End

SPARK ELECTRODE LEAD

LEAD 220MM LONG 0.7 PTFE CABLE - SPARK ELECTRODE

Next: End

NO SPARKING SEEN AT ELECTRODE TIP

SPARK ELECTRODE GAP

Next: End

THERMOCOUPLE INTERRUPTER CONNECTIONS

OVERHEAT THERMOSTAT (ECO CONNECTIONS)

Next: End

SPARKING SEEN AT ELECTRODE TIP BUT PILOT DOES NOT IGNITE

SPARK ELECTRODE GAP

Next: End

INLET PRESSURE PILOT

INLET PRESSURE

Next: End

PILOT INJECTOR

INJECTOR - PILOT

Next: End

INLET FILTER

FILTER GAUZE - EXPAMET

Next: End

FLOW REGULATOR

FLOW REGULATOR

Next: End

MAINS POWER SUPPLY

Next: End

HEATBANK OVERHEAT THERMOSTAT RESISTANCE

THERMOSTAT - HEATBANK OVERHEAT

Next: End

FUSE 3 AMP

FUSE 3 AMP

Next: End

FLOW SWITCH

FLOW SWITCH

Next: End

DHW LIMIT THERMOSTAT

HARNESS - HOT WATER OVERHEAT (DHW LIMIT STAT)

Next: End

ORANGE LINK

ORANGE LINK

Next: End

MAIN GAS VALVE (RESISTANCE)

GAS VALVE

Next: End

INLET PRESSURE

INLET PRESSURE

Next: End

GAS VALVE VOLTAGE G3

KIT - PCB 400 REPLACEMENT

Next: End

GAS VALVE VOLTAGE G3

INLET PRESSURE

Next: End

EXTERNAL CONTROLS/ROOM THERMOSTAT

Next: End

SELECTOR SWITCH

KIT - PCB 400 REPLACEMENT

Next: End

BURNER IGNITION (CH DEMAND)

KIT - PCB 400 REPLACEMENT

Next: End

DHW CONTROL THERMOSTAT(RESISTANCE)

GAS VALVE

Next: End

CH OPERATION (DIAG)

HEAT EXCHANGER (PLATE)

Next: End

HEATBANK OVERHEAT RESISTANCE

THERMOSTAT - RANCO K36P1333 (DHW STAT)

Next: End

BOILER SHUTS DOWN BEFORE DEMAND IS SATISFIED

HARNESS - HOT WATER OVERHEAT (DHW LIMIT STAT)

Next: End

COOLING FAN IMPELLER

IMPELLOR - COOLING FAN

Next: End

COOLING FAN MOTOR

MOTOR - COOLING FAN

Next: End

PUMP RUNS

KIT - PCB 400 REPLACEMENT

Next: End

GAS VALVE (SUPPLY)

GAS VALVE

Next: End

GAS VALVE (LOW PRESSURE)

GAS VALVE

Next: End

SPARK GENERATOR

SPARK GENERATOR - KIGASS CORVETTE 5800

Next: End

CH CONTROL THERMOSTAT VOLTAGE

KIT - PCB 400 REPLACEMENT

Next: End

DIVERTER VALVE OPERATION

KIT - PCB 400 REPLACEMENT

Next: End

DHW OP RELAY C STICKING

KIT - PCB 400 REPLACEMENT

Next: End

CH OPERATION

THERMOSTAT - RANCO K36P1332 (CH STAT)

Next: End

CH OPERATION

Next: End

PUMP OVERRUN

KIT - PCB 400 REPLACEMENT

Next: End

FAN RUNS

KIT - PCB 400 REPLACEMENT

Next: End

PILOT IGNITES AND ESTABLISHES BUT DOES NOT SWITCH OFF

GAS VALVE

Next: End

CH OPERATION - RADS ONLY GET WARM

Next: End

BY-PASS ADJUSTING SCREW

Next: End

DIVERTER VALVE OPERATION

DIVERTER VALVE

Next: End

DHW OPERATION

HEAT EXCHANGER (PLATE)

Next: End

HEATBANK SATISFIED

DIVERTER VALVE

Next: End

DHW OPERATION

DIVERTER VALVE

Next: End

PUMP RUNS NO DEMAND

SELECTOR SWITCH / PROGRAMMER

Next: End

THERMOCOUPLE

THERMOCOUPLE

Next: End

THERMOCOUPLE INTERRUPTER CONNECTIONS

GAS VALVE

Next: End

FLOW REGULATOR

HEAT EXCHANGER (PLATE)

Next: End

FUSE 3 AMP

KIT - PCB 400 REPLACEMENT

Next: End

PUMP

PUMP

Next: End

DHW CONTROL THERMOSTAT VOLTS IN

THERMOSTAT - RANCO K36P1333 (DHW STAT)

Next: End

ORANGE LINK

KIT - PCB 400 REPLACEMENT

Next: End

IGNITION BURNER PRESSURE

BURNER INJECTOR

Next: End

INLET PRESSURE

GAS VALVE

Next: End

BOILER DOES NOT SHUT DOWN AT CORRECT TEMPERATURES AND/OR GOES TO OVERHEAT

CHARACTERISTIC TEST FROM HEATBANK SATISFIED

Next: p133

BOILER KETTLES IMMEDIATELY. PILOT SHUTS DOWN

CHARACTERISTIC TEST FROM HEATBANK SATISFIED

Next: p136

BOILER SHUTS DOWN BEFORE DEMAND IS SATISFIED

CHARACTERISTIC TEST FROM HEATBANK SATISFIED

Next: p139

CH SYSTEM HEATS UP

CHARACTERISTIC TEST FROM HEATBANK SATISFIED

Next: p253

BOILER SHUTS DOWN BEFORE DEMAND IS SATISFIED

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p144

DHW DOES NOT REACH TEMPERATURE

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p146

RADIATORS HEAT WITH DHW DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p256

DHW RUNS COLD OR BOILER TAKES TOO LONG TO REFIRE

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p150

COOLING FAN DOES NOT RUN

CHARACTERISTIC TEST FROM COOLING FAN

Next: p173

COOLING FAN RUNS BUT IMPELLER DAMAGED OR SLIPS

CHARACTERISTIC TEST FROM COOLING FAN

Next: !p175

NO SPARKING SEEN AT THE ELECTRODE TIP

CHARACTERISTIC TEST FROM PILOT OPERATION

Next: p21

PILOT IGNITES BUT GOES OUT WHEN BUTTON IS RELEASED

CHARACTERISTIC TEST FROM PILOT OPERATION

Next: p23

CH NOISY, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION

Next: p221

BOILER SHUTS DOWN, BOILER TEMPERATURE LOW, RADIATOR TEMPERATURE LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p223

BOILER REACHES TEMPERATURE, RADIATORS DO NOT HEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p225

PUMP DOES NOT OVERRUN

CHARACTERISTIC TEST FROM PUMP OVERRUN

Next: !p234

PUMP OVERRUNS OVER 5 MINUTES

CHARACTERISTIC TEST FROM PUMP OVERRUN

Next: p236

PILOT IGNITES AND ESTSBLISHES BUT DOES NOT SWITCH OFF

CHARACTERISTIC TEST FROM PILOT OPERATION

Next: !p25

BOILER DOES NOT REACH TEMPERATURE - RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM CH OPERATION

Next: p260

SPARKING SEEN AT ELECTRODE TIP BUT PILOT DOES NOT IGNITE

CHARACTERISTIC TEST FROM PILOT OPERATION

Next: p43

09/07/2018 10:20:14 1807_1_50_1 20/07/2018 14:04:36

09/07/2018 14:12:12

Next: End

EXTERNAL CONTROLS/ROOM THERMOSTAT (VOLTS IN)

{GAINPCBACS}
HEAT

Next: !p103, f102

SELECTOR SWITCH / PROGRAMMER

{GAINPCBACS}
HEAT

Next: !p105, !f104

FLOW SWITCH (RESISTANCE)

DISCONNECT CONNECTOR X1 (BLUE & BROWN WIRES) FROM PCB.

Next: !p115, !f114

DIVERTER VALVE (VOLTAGE)

{GAINPCBACS}
HEAT

Next: p244, f204

FLOW SWITCH (RESISTANCE)

DISCONNECT CONNECTOR X1 (BLUE & BROWN WIRES) FROM PCB.

Next: p205, !f206

SELECTOR SWITCH (VOLTS IN)

{GAINPCBACS}
HEAT

Next: p240, !f241

THERMOCOUPLE INTERRUPTER CONNECTIONS

Next: !p38, !f190

INLET FILTER

DISCHARGE AND DRAIN THE HOT WATER CIRCUIT

Next: p55, !f54

HEATBANK OVERHEAT THERMOSTAT (VOLTAGE)

{GAINPCBACS}
HEATING TEMPERATURE SELECTOR TO OFF
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: p61, f60

MAINS POWER SUPPLY

{GAINPCBACS}
HEATING TEMPERATURE SELECTOR TO OFF
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: p63, !f62

FLOW SWITCH (RESISTANCE)

DISCONNECT CONNECTOR X1 (BLUE & BROWN WIRES) FROM PCB.

Next: !p185, !f72

GAS VALVE VOLTAGE

{GAINPCBACS}
PROG

Next: p75, f74

DHW CONTROL THERMOSTAT (VOLTS OUT)

{GAINPCBACS}
PROG

Next: p77, f76

DHW CONTROL THERMOSTAT (VOLTS IN )

{GAINPCBACS}
PROG

Next: !p79, f239

INLET PRESSURE

ATTACH U-GAUGE TO IN

Next: !p92, !f93

GAS VALVE VOLTAGE (GV3)

{GAINPCBACS}
PROG

Next: p96, !f95

EXTERNAL CONTROLS/ROOM THERMOSTAT (VOLTS OUT)

{GAINPCBACS}
HEAT

Next: p101, f100

CH CONTROL THERMOSTAT (VOLTS IN)

{GAINPCBACS}
HEAT

Next: p198, f106

DHW CONTROL THERMOSTAT (RESISTANCE)

HEATING TEMPERATURE

Next: !p135, !f134

CH OPERATION (DIAG)

HEATING TEMPERATURE SELECTOR TO MAXIMUM
HOT WATER TEMPERATURE SELECTOR TO OFF

Next: !p138, !f137

HEATBANK OVERHEAT (RESISTANCE)

REMOVE CONNECTOR X14

Next: !p141, !f140

DHW CONTROL THERMOSTAT

{GAINPCBACS}
PROG

Next: !p156, !f155

MAIN BURNER INJECTOR

Next: p263, !f157

FLOW SWITCH (RESISTANCE)

DISCONNECT CONNECTOR X1 (BLUE & BROWN WIRES) FROM PCB.

Next: p213, !f159

COOLING FAN (VOLTAGE)

{GAINPCBACS}
HEAT

Next: !p184, !f183

RESISTANCE CH CONTROL THERMOSTAT

{GAINPCBACS}
CH TEMPERATURE SELECTOR TO MAX
DISCONNECT CONNECTOR X15 FROM PCB

Next: !p199, !f200

RESISTANCE DHW CONTROL THERMOSTAT (OPEN)

{GAINPCBACS}
HOT WATER TEMPERATURE SELECTOR TO OFF
DISCONNECT CONNECTOR X2 FROM PCB

Next: !p207, !f208

SPARK ELECTRODE

Next: p29, !f193

RESISTANCE DHW CONTROL THERMOSTAT

{GAINPCBACS}
HOT

Next: !p214, !f215

BY-PASS ADJUSTING SCREW

Next: p228, !f229

BY-PASS ADJUSTING SCREW

Next: p266, !f227

PRESSURE BURNER (CENTRAL HEATING)

ATTACH U-GAUGE TO BU

Next: !p230, !f231

THERMOCOUPLE VOLTAGE

ATTACH +VE PROBE OF MULTIMETER TO A SUITABLE EARTH POINT VIA CROCODILE CLIP
GAS ON

Next: p36, f35

OBSERVATION DEMAND LIGHT

PROGRAMMER OR SELECTOR SWITCH SET TO HOT WATER ONLY

Next: p284, !f238

SELECTOR SWITCH (VOLTS OUT)

{GAINPCBACS}
HEAT

Next: !p242, !f243

RESISTANCE DIVERTER VALVE

DISCONNECT CONNECTOR X7 FROM THE PCB

Next: p245, !f283

INSPECTION PUMP CHECK VALVE

DRAIN BOILER PRIMARY CIRCUIT

Next: p247, !f248

INSPECTION DIVERTER VALVE PRESSURE RELIEF PIPE

DRAIN BOILER PRIMARY CIRCUIT
REMOVE PUMP ASSEMBLY

Next: p269, !f250

DIVERTER VALVE (VOLTAGE) - DHW DEMAND

{GAINPCBACS}
HEAT

Next: p277, !f255

DIVERTER VALVE (VOLTAGE) - DHW DEMAND

{GAINPCBACS}
HEAT

Next: p280, !f258

PRESSURE BURNER (CENTRAL HEATING)

ATTACH U-GAUGE TO BU

Next: !p261, !f262

TEMPERATURE DHW AT BOILER AND TAP

Next: p274, !f265

INSPECTION NON-RETURN VALVE

DRAIN BOILER AND SYSTEM OF WATER

Next: !p267, !f268

INSPECTION HEATING FILTER

DRAIN BOILER PRIMARY CIRCUIT
REMOVE THERMOSTAT PHIAL AND PHIAL POCKET

Next: p270, !f271

INSPECTION NON-RETURN VALVE

DRAIN BOILER AND SYSTEM OF WATER

Next: !p272, !f273

INSPECTION HEATING FILTER

DRAIN BOILER PRIMARY CIRCUIT
REMOVE THERMOSTAT PHIAL AND PHIAL POCKET

Next: !p275, !f276

INSPECTION NON-RETURN VALVE

DRAIN BOILER AND SYSTEM OF WATER

Next: !p278, !f279

INSPECTION NON-RETURN VALVE

DRAIN BOILER AND SYSTEM OF WATER

Next: !p281, !f282

OBSERVATION DISCONNECT PROGRAMMER / SELECTOR SWITCH

UNPLUG 4 PIN CONNECTOR AT X12 FROM THE PCB

Next: !p285, !f286

SPARK ELECTRODE LEAD

Next: p32, !f30

SPARK ELECTRODE GAP

Next: !p194, !f33

OVERHEAT THERMOSTAT (RESISTANCE)

Next: p40, !f187

THERMOCOUPLE INTERRUPTER CONNECTIONS

Next: !p42, !f41

SPARK ELECTRODE GAP

Next: p48, !f44

INLET PRESSURE (PILOT)

ATTACH U-GAUGE TO INLET PRESSURE TEST POINT
GAS ON

Next: p50, !f49

PILOT INJECTOR

Next: !p191, !f51

FLOW REGULATOR

DISCHARGE AND DRAIN THE HOT WATER CIRCUIT

Next: !p57, !f56

PUMP

{GAINPCBACS}
HEAT

Next: !p69, f70

HEATBANK OVERHEAT THERMOSTAT (RESISTANCE)

DISCONNECT CONNECTOR X14 (RED LEADS) FROM PCB

Next: p65, !f64

FUSE (3 AMP)

REMOVE FUSE FROM ITS HOLDER ON THE PCB

Next: !p67, !f66

MAIN GAS VALVE (RESISTANCE)

REMOVE BLACK PLUG FROM MAIN GAS VALVE SOLENOID

Next: p87, !f88

DHW LIMIT THERMOSTAT (RESISTANCE)

REMOVE CONNECTOR X16 (BLACK WIRES) FROM PCB

Next: p83, !f82

ORANGE LINK

Next: !p85, !f84

IGNITION BURNER PRESSURE

ATTACH U-GAUGE TO BU

Next: !p90, f91

INLET PRESSURE

ATTACH U-GAUGE TO IN

Next: !p192, !f97

System Information

  • Total Tests: 199
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control