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 TURBOMAX VUW 242 EH

WARNING - IMPORTA

Next: &15, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

ANTI-CYCLE

ON/OFF SWITCH IN ON

Next: &nff, !f18

PUMP OVERRUN

ON/OFF SWITCH IN ON

Next: &1, !f177

BURNER MODULATION

ON/OFF SWITCH IN ON

Next: &2, f172

SYSTEM PRESSURE RISE

ON/OFF SWITCH IN ON

Next: &3, !f163

CH OPERATION

ON/OFF SWITCH IN ON

Next: &4, ?157, ?159, ?161

DHW OPERATION

ON/OFF SWITCH IN ON

Next: &5, ?139, ?141, ?143, ?145

DHW MAXIMUM BURNER PRESSURE

ON/OFF SWITCH IN ON

Next: &6, ?123, ?125

DHW DEMAND

ON/OFF SWITCH IN ON

Next: &7, ?326, ?328

BURNER ESTABLISHED

ON/OFF SWITCH IN ON

Next: &8, ?92, ?94, ?96

FAN RUNS (CH DEMAND)

ON/OFF SWITCH IN ON

Next: &191, f51

PUMP RUNS (CH DEMAND)

ON/OFF SWITCH IN ON

Next: &11, f26

DHW FLOW RATE

Next: &12, f19

VAILLANT TURBOMAX VUW 242 EH

G.C. NUMBER 47 044 2

Next: &13, !f16

ELECTRODE SPARKING

ON/OFF SWITCH IN ON

Next: &9, f192

FURTHER INVESTIGATION PCB

INTENTIONALLY BLANK

Next: &nff, f244

FUSE FURTHER INVESTIGATION

INTENTIONALLY BLANK HEADER FOR FUSE INVESTIGATION

Next: &nff, f278

BURNER ESTABLISHED

ELECTRODE - MONITORING

Next: End

BURNER ESTABLISHED

ELECTRODE - IGNITION (GAP)

Next: End

DHW MAXIMUM BURNER PRESSURE

PRIMARY HEAT EXCHANGER - VUW 242/1

Next: End

DHW MAXIMUM BURNER PRESSURE

FLUE

Next: End

DHW MAXIMUM BURNER PRESSURE

SENSOR NTC

Next: End

DHW MAXIMUM BURNER PRESSURE

GAS VALVE INLET PRESSURE

Next: End

DHW OPERATION

PRIMARY HEAT EXCHANGER - VUW 242/1

Next: End

DHW OPERATION

FLUE

Next: End

DHW OPERATION

INJECTOR 1.20MM DIA - BURNER - NG

Next: End

DHW OPERATION

SPILL VALVE

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

SYSTEM PRESSURE RISE

EXPANSION VESSEL

Next: End

CH NOISY, DHW OK

DIVERTER SECTION

Next: End

CH NOISY, DHW OK

SPILL VALVE

Next: End

BOILER HEATS, BUT RADS COLD

DIVERTER SECTION

Next: End

BOILER HEATS, BUT RADS COLD

SPILL VALVE

Next: End

BURNER MODULATION

SENSOR NTC

Next: End

PUMP OVERRUN

PCB

Next: End

PUMP RUNS (CH DEMAND)

PCB

Next: End

ANTI-CYCLE

PCB

Next: End

FAN RUNS (CH DEMAND)

SENSOR NTC

Next: End

FAN RUNS (CH DEMAND)

PCB

Next: End

FAN RUNS (CH DEMAND)

HOSE SILICONE RUBBER

Next: End

ELECTRODE SPARKING

HOSE SILICONE RUBBER

Next: End

DHW FLOW RATE

DHW ISOLATING VALVE

Next: End

ELECTRODE SPARKING

TUBE - PITOT

Next: End

ELECTRODE SPARKING

FLUE

Next: End

ELECTRODE SPARKING

MICROSWITCH

Next: End

ELECTRODE SPARKING

ELECTRODE - IGNITION

Next: End

DHW FLOW FLOW RATE

VALVE

Next: End

SCALED

HEAT EXCHANGER - SECONDARY - DHW

Next: End

BURNER ESTABLISHED

GAS VALVE INLET PRESSURE

Next: End

GAS VALVE 2 VOLTAGE

PCB

Next: End

BURNER ESTABLISHED

MAGNETO

Next: End

BURNER ESTABLISHED

OPERATOR GAS

Next: End

GV1 RESISTANCE

MAGNETO AND PCB

Next: End

GV2 RESISTANCE

OPERATOR AND PCB

Next: End

GAS VALVE 1 VOLTAGE

PCB

Next: End

GREEN RESISTOR BLOWN

MAGNETO AND PCB

Next: End

RESISTANCE WRONG

MAGNETO

Next: End

DHW FLOW RATE

COLD WATER SUPPLY

Next: End

NO SPARKING

CABLE TREE

Next: End

FUSE FURTHER INVESTIGATION

FAN

Next: End

FUSE FURTHER INVESTIGATION

PUMP COMPLETE 240V - GRUNDFOS VP5ZE

Next: End

PUMP RUNS (CH DEMAND)

FUSE 2A

Next: End

FUSE FURTHER INVESTIGATION

TRANSFORMER

Next: End

PUMP RUNS (CH DEMAND)

PACK - 5 OFF FUSES 125MA 20MM GLASS

Next: End

NO SPARKING

FAN

Next: End

PUMP RUNS

MAINS FUSE

Next: End

ELECTRODE SPARKING

CONTROL LINE

Next: End

ELECTRODE SPARKING

FLOW SWITCH - PPO

Next: End

ELECTRODE SPARKING

PUMP COMPLETE 240V - GRUNDFOS VP5ZE

Next: End

PUMP RUNS (CH DEMAND)

FUSE 2 AMP

Next: End

DHW DEMAND

DIAPHRAGM

Next: End

DHW DEMAND

MICROSWITCH

Next: End

DHW DEMAND

PUMP COMPLETE 240V - GRUNDFOS VP5ZE

Next: End

DHW DEMAND

CONTROL LINE

Next: End

DHW DEMAND

FLOW SWITCH - PPO

Next: End

TRANSFORMER (VOLTAGE IN)

PCB

Next: End

EXTERNAL CONTROLS (VOLTAGE IN)

Next: End

PUMP RUNS (CH DEMAND)

LIMITER - TEMPERATURE

Next: End

FAN RUNS (CH DEMAND)

TUBE - PITOT

Next: End

FAN RUNS (CH DEMAND)

FLUE

Next: End

BURNER ESTABLISHED

CABLE TREE

Next: End

BURNER IGNITES, SPARKING CONTINUES THEN BOILER LOCKS OUT

PCB

Next: End

BURNER ESTABLISHED

INJECTOR 1.20MM DIA - BURNER - NG

Next: End

DHW MAXIMUM BURNER PRESSURE

FAN

Next: End

DHW MAXIMUM BURNER PRESSURE

PCB

Next: End

DHW OPERATION

DIVERTER SECTION

Next: End

DHW OPERATION

FAN

Next: End

DHW COLD, RADIATORS COLD

HEAT EXCHANGER - SECONDARY - DHW

Next: End

DHW NOISY OPERATION, KETTLES

HEAT EXCHANGER - SECONDARY - DHW

Next: End

DHW OPERATION

PRIMARY HEAT EXCHANGER - VUW 242/1

Next: End

CH OPERATION

MICROSWITCH

Next: End

CH NOISY, DHW OKAY

Next: End

BOILER HEATS, BUT RADS COLD

Next: End

BURNER MODULATION

GAS SECTION

Next: End

BURNER MODULATION

PCB

Next: End

FAN RUNS (CH DEMAND)

FAN

Next: End

FAN VOLTAGE

PCB

Next: End

FAN RUNS (CH DEMAND)

Next: End

ELECTRODE SPARKING

PCB

Next: End

IGNITION ELECTRODE LEADS

WIRE - IGNITION

Next: End

DHW FLOW RATE

FILTER

Next: End

GV2 PCB

DIRECTION CHOICE OR CONTINUE

Next: End

BURNER ESTABLISHED

GAS SECTION

Next: End

FURTHER INVESTIGATION

PCB

Next: End

FURTHER IN VESTIGATION GV1 PCB

DIRECTION CHOICE OR CONTINUE

Next: End

INLET PRESSURE

MAGNETO

Next: End

FUSE FURTHER INVESTIGATION

ZREDIRECTION

Next: End

FUSE FURTHER INVESTIGATION

PCB FUSE FURTHER INVESTIGATION

Next: End

FUSE FURTHER INVESTIGATION F3

ZREDIRECTION

Next: End

ELECTRODE SPARKING

SWITCH - FAN PROVING

Next: End

PUMP RUNS (CH DEMAND)

Next: End

FUSE FURTHER INVESTIGATION MAINS

ZREDIRECTION

Next: End

ELECTRODE SPARKING

FLOW SWITCH - PPO

Next: End

FUSE FURTHER INVESTIGATION 2

ZREDIRECTION

Next: End

DHW DEMAND

DIVERTER SECTION

Next: End

DHW DEMAND

PCB

Next: End

DHW DEMAND

PCB

Next: End

FUSE F2 RESISTANCE

PCB

Next: End

DHW DEMAND

FLOW SWITCH - PPO

Next: End

PUMP RUNS (CH DEMAND)

TRANSFORMER

Next: End

PUMP RUNS (CH DEMAND)

Next: End

PUMP RUNS

PUMP COMPLETE 240V - GRUNDFOS VP5ZE

Next: End

PUMP RUNS (CH DEMAND)

PCB

Next: End

FAN RUNS (CH DEMAND)

SWITCH - FAN PROVING

Next: End

BURNER BAFFLES OUT

CHARACTERISTIC TEST FROM DHW MAXIMUM BURNER PRESSURE

Next: p124

BURNER PRESSURE UNSATISFACTORY

CHARACTERISTIC TEST FROM DHW MAXIMUM BURNER PRESSURE

Next: p126

BURNER BAFFLES OUT

CHARACTERISTIC TEST FROM DHW MAXIMUM BURNER PRESSURE

Next: p140

DHW COLD, RADIATORS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p142

DHW COLD, RADIATORS HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p144

DHW NOISY OPERATION, KETTLES

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p146

CH NOISY, DHW OKAY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p158

BOILER HEATS, BUT RADS COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p160

RADIATORS ON CONSTANT WHEN POWER APPLIED TO APPLIANCE

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p162

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM DHW DEMAND

Next: p330

FAN RUNS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM DHW DEMAND

Next: p337

BURNER IGNITES, SPARKING CONTINUES THEN BOILER LOCKS OUT

CHARACTERISTIC TEST FROM BURNER ESTABLISHED

Next: p93

BURNER PRESSURE, SPARKING PRESENT BUT BURNER FAILS TO IGNITE

CHARACTERISTIC TEST FROM BURNER ESTABLISHED

Next: p95

INSUFFICIENT OR NO BURNER PRESSURE

CHARACTERISTIC TEST FROM BURNER ESTABLISHED

Next: p228

05/04/2018 14:10:58 1803_1_50_1 10/04/2018 15:17:47

06/04/2018 09:34:25

Next: End

NTC RESISTANCE

DISCONNECT SENSOR LEAD

Next: !p134, !f133

SPILL VALVE

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: !p156, !f155

GAS VALVE 3 MODULATION VOLTAGE

REMOVE PLASTIC TOP C

Next: !p174, f173

NTC MODULATION RESISTANCE

DISCONNECT SENSOR LEAD

Next: !p176, !f175

NTC RESISTANCE

DISCONNECT SENSOR LEAD

Next: !p184, !f185

EXTERNAL CONTROLS (VOLTAGE IN)

{USEINSMAT}
ON/OFF SWITCH IN ON POSITION

Next: !p187, !f188

DHW ISOLATING VALVE

Next: p259, !f20

SPARK GENERATOR VOLTAGE

{USEINSMAT}
DISCO

Next: p193, f194

AIR PRESSURE SWITCH (AIR DETECT)

DISCONNECT LEADS FRO

Next: p266, f196

AIR PRESSURE SWITCH TUBES

Next: p197, !f198

PCB FURTHER INVESTIGATION

Next: !p237, !f238

GAS VALVE 1 RESISTANCE (FURTHER INVESTIGATION)

DISCONNECT CONNECTOR MARKED X101 (GREY CONNECTOR)
FROM THE SWITCHBOARD

Next: p245, !f246

RESISTANCE OF RESISTOR R185 AT PCB

Next: p253, !f256

TRANSFORMER (VOLTAGE OUT)

{USEINSMAT}
REMOV

Next: p28, f27

EXTERNAL CONTROLS (VOLTAGE IN)

{USEINSMAT}
ON/OFF SWITCH IN ON POSITION

Next: p317, f29

RESISTANCE FAN (FUSE FURTHER INVESTIGATION)

REMOVE ELECTRICAL CONNECTIONS TO FAN ASSEMBLY

Next: p279, !f280

FUSE FURTHER INVESTIGATION

Next: !p291, !f292

MAINS POWER SUPPLY

{USEINSMAT}

Next: p32, f304

FUSE FURTHER INVESTIGATION

Next: !p299, !f300

RESISTANCE MAINS FUSE

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p305, f306

FUSE FURTHER INVESTIGATION MAINS

Next: !p307, !f308

PUMP LIMPET TEST

Next: p310, !f316

FUSE FURTHER INVESTIGATION F2

Next: !p323, !f324

DIVERTER VALVE DIAPHRAGM

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: !p333, !f334

PUMP LIMPET TEST

Next: p340, !f341

EXTERNAL CONTROLS (VOLTAGE IN)

{USEINSMAT}
ON/OFF SWITCH IN ON POSITION

Next: !p42, !f41

OVERHEAT THERMOSTAT RESISTANCE

DISCONNECT BLACK LEADS FROM THE OVERHEAT THERMOSTAT.

Next: p46, !f45

AIR PRESSURE SWITCH (NORMALLY OPEN)

DISCONNECT ONE LEAD FROM THE AIR PRESSURE SWITCH

Next: p53, f52

AIR PRESSURE SWITCH TUBES

Next: p55, !f189

HEAT EXCHANGER FLUE WAYS

REMOVE THE COMBUSTION CHAMBER FRONT PANEL

Next: p128, !f127

GAS VALVE 3 VOLTAGE

TURN HOT WATER TAP O

Next: p132, f131

FLUE CHECK

Next: !p130, !f129

GAS VALVE 3 RESISTANCE

DISCONNECT LEADS FROM MODULATING SOLENOID

Next: p136, !f257

GAS INLET PRESSURE (DHW)

ON/OFF SWITCH IN ON

Next: !p258, !f137

HEAT EXCHANGER FLUE WAYS

REMOVE THE COMBUSTION CHAMBER FRONT PANEL

Next: p148, !f147

GAS RATE

Next: !p152, !f151

CENTRAL HEATING OPERATION

CH TEMP SELECTOR SWI

Next: !p154, f153

FLUE CHECK

Next: !p150, !f149

DIVERTER VALVE OPERATION (CH)

ON/OFF SWITCH IN ON

Next: p165, !f164

DIVERTER VALVE OPERATION (CH)

ON/OFF SWITCH IN ON

Next: p169, !f168

SPILL VALVE

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: !p167, !f166

SPILL VALVE

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: !p171, !f170

FAN VOLTAGE

{USEINSMAT}
ON/OF

Next: !p182, f183

IGNITION ELECTRODES

Next: !p211, !f212

DIFFERENTIAL PRESSURE SWITCH

ON/OFF SWITCH IN ON

Next: p203, f309

INSPECTION VENTURI

Next: p199, !f200

FLUE CHECK

Next: p301, !f202

DIFFERENTIAL PRESSURE SWITCH MICROSWITCH

DISCONNECT LEADS FRO

Next: !p209, !f210

FLOW LIMITER

Next: p23, !f22

GAS INLET PRESSURE (CH)

ON/OFF SWITCH IN ON

Next: p229, !f230

GAS VALVE 1 VOLTAGE

{USEINSMAT}
ON/OF

Next: p231, f249

DHW FILTER

WATER OFF
BOILER DISCHARGED

Next: !p220, !f221

GAS VALVE 2 VOLTAGE

ON/OFF SWITCH IN ON

Next: p235, f236

GAS VALVE 1 RESISTANCE

DISCONNECT CONNECTOR MARKED X101 (GREY CONNECTOR)
FROM THE SWITCHBOARD

Next: p239, !f240

GAS VALVE 2 RESISTANCE

REMOVE PLASTIC TOP C

Next: !p241, !f242

GAS VALVE 2 RESISTANCE (FURTHER INVESTIGATION)

REMOVE PLASTIC TOP C

Next: !p247, !f248

PCB FURTHER INVESTIGATION

Next: !p254, !f255

OBSERVATION COLD WATER SUPPLY

Next: p21, !f265

RESISTANCE AIR PRESSURE SWITCH HARNESS

REMOVE CONNECTOR X100 FROM PCB

Next: p195, !f276

RESISTANCE PUMP ASSEMBLY (FUSE FURTHER INVESTIGATION)

REMOVE CONNECTOR X10 FROM PCB

Next: p295, !f282

EXTERNAL CONTROLS (VOLTAGE OUT)

{USEINSMAT}
ON/OF

Next: p40, f39

RESISTANCE TRANSFORMER

REMOVE CONNECTOR X12 FROM THE PCB

Next: !p296, !f297

TRANSFORMER (VOLTAGE IN)

{USEINSMAT}
ON/OFF SWITCH IN ON POSITION

Next: !p38, !f37

INSPECTION FAN ASSEMBLY

REMOVE FAN ASSEMBLY FROM BOILER

Next: !p302, !f303

DIFFERENTIAL PRESSURE SWITCH TUBE

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: p311, !f312

DIFFERENTIAL PRESSURE SWITCH DIAPHRAGM

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: !p313, !f314

FUSE F2 RESISTANCE

REMOVE FUSE F2 FROM MAIN SWITCHBOARD

Next: p30, f322

FUSE F1 RESISTANCE

REMOVE FUSE F1 FROM MAIN SWITCHBOARD

Next: !p34, f289

DHW DEMAND (DIVERTER VALVE)

TURN OFF DHW INLET ISOLATING VALVE
TURN ON HOT TAP

Next: p331, f332

DHW MICROSWITCH OPERATION

REMOVE PLASTIC COVER

Next: !p335, !f336

DIFFERENTIAL PRESSURE SWITCH (DHW)

ON/OFF SWITCH IN ON

Next: !p338, f339

DIFFERENTIAL PRESSURE SWITCH TUBE

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: p342, !f343

DIFFERENTIAL PRESSURE SWITCH DIAPHRAGM

WATER OFF
BOILER DISCHARGED AND DRAINED

Next: !p344, !f345

PUMP VOLTAGE

{USEINSMAT}
ON/OF

Next: !p44, f43

FUSE F3 RESISTANCE

REMOVE FUSE F3 FROM MAIN SWITCHBOARD

Next: p48, f298

DC SUPPLY TO CONTROL BOARD

REMOVE BLACK PLASTIC

Next: !p50, !f178

EXTERNAL CONTROLS (VOLTAGE OUT)

{USEINSMAT}
ON/OF

Next: p181, f186

INSPECTION VENTURI

Next: p57, !f56

FLUE CHECK

Next: !p59, !f58

FLAME SENSE ELECTRODE LEAD

Next: p99, !f98

SPARK ELECTRODE GAP

Next: !p103, !f102

FLAME SENSE ELECTRODE

Next: !p101, !f100

System Information

Total Tests: 222

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control