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:

BAXI BAHAMA 100 HONEYWELL

WARNING - IMPORTA

Next: &1, *

APPLIANCE APPEARS SATISFACTORY.

Next: nff

BAXI BAHAMA 100 HONEYWELL

G.C. NUMBER 47 075 0

Next: &3, !f17

DHW FLOW RATE

Next: &4, f19

DHW PUMP RUNS

SELECTOR SWITCH TO DHW POSITION
CH TEMPERATURE SELECTOR TO MIN
DHW TEMPERATURE SELECTOR TO MAX

Next: &236, f24

DHW BURNER IGNITION

ATTACH U-GAUGE TO GA

Next: &7, ?61, ?63, ?65

DHW BURNER ESTABLISHED (HIGH FLAME)

ATTACH U-GAUGE TO GA

Next: &8, ?94, ?96, ?98

CH IGNITION

ATTACH U-GAUGE TO GA

Next: &9, ?119, ?121

DHW OPERATION

SELECTOR SWITCH TO DHW POSITION
CH TEMPERATURE SELECTOR TO MIN
DHW TEMPERATURE SELECTOR TO MAX

Next: &10, ?137, ?139, ?141, ?345

DHW MODULATION

SET FLOW RATE AT TAP

Next: &11, f157

AUTO FROST

SELECTOR SWITCH TO O

Next: &12, f160

CH OPERATION

SELECTOR SWITCH TO D

Next: &13, ?163, ?165, ?167

SYSTEM PRESSURE RISE

SELECTOR SWITCH TO D

Next: &14, !f193

CH MODULATION

ATTACH A U-GAUGE TO

Next: &15, !f194

RE-IGNITION DELAY

SELECTOR SWITCH TO D

Next: &16, !f195

PUMP OVERRUNS

SELECTOR SWITCH TO D

Next: &nff, !f196

DHW FAN RUNS

SELECTOR SWITCH TO DHW POSITION
CH TEMPERATURE SELECTOR TO MIN
DHW TEMPERATURE SELECTOR TO MAX

Next: &6, ?237, ?239

DHW BURNER ESTABLISHED

FLAME SENSE ELECTRODE

Next: End

DHW BURNER ESTABLISHED

FLAME SENSE ELECTRODE LEAD

Next: End

DHW BURNER ESTABLISHED

PRIMARY HEAT EXCHANGER FLOW

Next: End

BURNER IGNITES BUT BAFFLES OUT

GAS INLET PRESSURE

Next: End

DHW BURNER ESTABLISHED

NTC SENSOR

Next: End

CH IGNITION

DHW FLOW SWITCH

Next: End

DHW OPERATION

INTEGRAL BYPASS

Next: End

DHW NOISY OPERATION

MAIN PCB

Next: End

DHW OPERATION

BURNER MANIFOLD

Next: End

DHW TEMPERATURE LOW RADIATORS HOT

MAIN PCB

Next: End

DHW OPERATION

DIVERTER VALVE BODY

Next: End

DHW MODULATION

NTC SENSOR

Next: End

AUTO FROST

NTC SENSOR

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PUMP

Next: End

CH OPERATION

NTC SENSOR

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

CH FILTER

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

INTEGRAL BYPASS

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

CH FILTER

Next: End

CH OPERATION

DIVERTER VALVE BODY

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

MAIN PCB

Next: End

CH NOISY DHW OK

PUMP

Next: End

CH NOISY DHW OK

INTEGRAL BYPASS

Next: End

CH NOISY DHW OK

DIVERTER VALVE BODY

Next: End

SYSTEM PRESSURE VESSEL

EXPANSION VESSEL

Next: End

CH MODULATION

MAIN PCB

Next: End

RE-IGNITION DELAY

MAIN PCB

Next: End

PUMP OVERRUNS

MAIN PCB

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PUMP

Next: End

DHW FLOW RATE

DHW ISOLATOR

Next: End

OVERHEAT THERMOSTAT RESISTANCE

ELECTRODE LEADS

Next: End

DHW BURNER IGNITION

GAS VALVE

Next: End

DHW BURNER IGNITION

GAS INLET PRESSURE

Next: End

NO IGNITION NO OUTPUT FROM IGNITION BOARD

IGNITION CONTROL BOX

Next: End

HIGH FLAME NO OUTPUT FROM IGNITION BOARD

IGNITION CONTROL BOX

Next: End

DHW FLOW RATE

DHW INLET FILTER RESTRICTOR CARTRIDGE

Next: End

BURNER IGNITION PRESSURE LOW OR DIES OUT

GAS INLET PRESSURE

Next: End

MODULATING SOLENOID

GAS VALVE

Next: End

FAN RUNS 10 SECONDS THEN STOPS

NTC SENSOR

Next: End

DHW FAN RUNS

OVERHEAT THERMOSTAT

Next: End

DHW PUMP RUNS

DHW FLOW SWITCH

Next: End

PUMP RUNS

CH FLOW SWITCH

Next: End

MAIN PCB

FUSE

Next: End

PUMP DOES NOT RUN

NTC SENSOR

Next: End

CLOCK IN VOLTS INPUT TERMINAL 1

MAIN PCB

Next: End

CH IGNITION

Next: End

CH IGNITION

Next: End

FAN DOES NOT RUN

PUMP

Next: End

DHW FAN RUNS

AIR PRESSURE SWITCH TUBES

Next: End

DHW FAN RUNS

VENTURI

Next: End

DHW FAN RUNS

FLUE

Next: End

FAN DOES NOT RUN

MAIN PCB

Next: End

FAN DOES NOT RUN

NTC SENSOR

Next: End

DHW FAN RUNS

LOCK OUT RESET SWITCH

Next: End

DHW PUMP RUNS

MAINS POWER IN

Next: End

BURNER CUTS OUT DHW

PUMP

Next: End

DHW RUNS HOT COLD

PUMP

Next: End

DHW RUNS HOT COLD

CH FLOW SWITCH

Next: End

DHW RUNS HOT COLDDHW OPERATION

INTEGRAL BYPASS

Next: End

NO CH

PUMP

Next: End

CH IGNITION

CH FILTER

Next: End

DHW FAN RUNS SHORT CCT

CH FLOW SWITCH

Next: End

DHW FAN RUNS THEN STOPS SHORT CCT

CH FLOW SWITCH

Next: End

DHW FAN RUNS THEN STOPS

PUMP

Next: End

BURNER CUTS OUT SHORT CCT

CH FLOW SWITCH

Next: End

CH IGNITION SHORT CCT

CH FLOW SWITCH

Next: End

NO SPARK

SPARK GAP

Next: End

DHW BURNER IGNITION

SPARK ELECTRODE

Next: End

DHW BURNER IGNITION

EARTH ELECTRODE

Next: End

DHW BURNER IGNITION

OVERHEAT THERMOSTAT

Next: End

DHW BURNER IGNITION

AIR PRESSURE SWITCH TUBES

Next: End

DHW BURNER IGNITION

VENTURI

Next: End

DHW BURNER IGNITION

FLUE

Next: End

SPARK GAS PRESENT NO IGNITION

SPARK GAP

Next: End

DHW BURNER ESTABLISHED

IGNITION CONTROL BOX

Next: End

BURNER IGNITES BUT BAFFLES OUT

GAS VALVE

Next: End

CH IGNITION

GAS VALVE

Next: End

DHW OPERATION

SECONDARY HEAT EXCHANGER

Next: End

DHW OPERATION

PRIMARY HEAT EXCHANGER

Next: End

DHW NOISY OPERATION

DIVERTER VALVE HEAD

Next: End

DHW TEMPERATURE LOW RADIATORS COLD

SECONDARY HEAT EXCHANGER

Next: End

DHW TEMPERATURE LOW RADIATORS HOT

DIVERTER VALVE HEAD

Next: End

DHW MODULATION

MAIN PCB

Next: End

AUTO FROST

MAIN PCB

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

MAIN PCB

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

DIVERTER VALVE HEAD

Next: End

CH NOISY DHW OK

Next: End

NO SPARK

IGNITION CONTROL BOX

Next: End

DHW FLOW RATE

DHW HEAT EXCHANGER

Next: End

MECHANICAL FAILURE

GAS VALVE

Next: End

MAINS IN

HARNESS

Next: End

DHW PUMP RUNS

PUMP

Next: End

DHW PUMP RUNS

MAIN PCB

Next: End

NO GAS

GAS VALVE

Next: End

CH IGNITION

Next: End

CH IGNITION

Next: End

NO CH IGNITION NO PUMP

MAIN PCB

Next: End

DHW FAN RUNS

CH FLOW SWITCH

Next: End

DHW FAN RUNS

AIR PRESSURE SWITCH

Next: End

DHW FAN RUNS

FAN

Next: End

FAN DOES NOT RUN 2

MAIN PCB

Next: End

DHW FAN RUNS

IGNITION CONTROL BOX

Next: End

BURNER CUTS OUT DHW

CH FLOW SWITCH

Next: End

DHW RUNS HOT COLDDHW OPERATION

SECONDARY HEAT EXCHANGER

Next: End

DHW RUNS HOT COLDDHW OPERATION

PRIMARY HEAT EXCHANGER

Next: End

RTC OUTPUT TERMINAL 4

MAIN PCB

Next: End

NO CH

CH FLOW SWITCH

Next: End

DHW FAN RUNS NO VOLTAGE TO CH FLOW SWITCH

MAIN PCB

Next: End

FAN RUNS 10 SECONDS THEN STOPS

MAIN PCB

Next: End

DHW FAN RUNS THEN STOPS NO VOLTAGE TO CH FLOW SWITCH

MAIN PCB

Next: End

DHW FAN RUNS THEN STOPS NOT MAKING

CH FLOW SWITCH

Next: End

BURNER CUTS OUT NO VOLTAGE TO CH FLOW SWITCH

MAIN PCB

Next: End

CH IGNITION NO VOLTAGE TO CH FLOW SWITCH

MAIN PCB

Next: End

ELECTRODE GAP

ELECTRODE LEADS

Next: End

DHW BURNER IGNITION

AIR PRESSURE SWITCH

Next: End

DHW BURNER IGNITION

BURNER MANIFOLD

Next: End

Burner ignites straight to high flame

CHARACTERISTIC TEST FROM CH IGNITION

Next: p120

No ignition

CHARACTERISTIC TEST FROM CH IGNITION

Next: p293

DHW noisy operation

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p138

DHW temperature low, radiators cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p140

DHW temperature low, radiators hot

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p142

Boiler and radiators provide insufficient heat

CHARACTERISTIC TEST FROM CH OPERATION

Next: p164

Boiler to temperature, radiators cold

CHARACTERISTIC TEST FROM CH OPERATION

Next: p166

CH noisy, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION

Next: p168

FAN DOES NOT RUN OR RUNS INTERMITTENTLY

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p312

FAN RUNS 10-15 SECONDS THEN STOPS

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p240

VOLTAGE AS EXPECTED ON TEST 1 BUT DOES NOT DROP ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p315

VOLTAGE NOT AS EXPECTED ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p365

VOLTAGE AS EXPECTED ON TEST 1 BUT DOES NOT DROP ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p342

VOLTAGE NOT AS EXPECTED ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p384

DHW CUTS OUT OR RUNS HOT COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p346

VOLTAGE AS EXPECTED ON TEST 1 BUT DOES NOT DROP ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p358

VOLTAGE NOT AS EXPECTED ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p387

VOLTAGE AS EXPECTED ON TEST 1 BUT DOES NOT DROP ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p381

VOLTAGE NOT AS EXPECTED ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE CH FLOW SWITCH DROP

Next: p378

No spark

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p62

Sparking present, no gas

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p219

Sparking, gas present, no ignition

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p66

BURNER IGNITION PRESSURE LOW OR DIES OUT WITHIN 20 SECONDS

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p276

Burner ignites but baffles out

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p110

Burner ignition spark continues, boiler goes to lockout

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p99

30/01/2018 14:59:05 1801_1_50_1 06/03/2018 13:33:18

30/01/2018 15:07:50

Next: End

DHW DIVERTER VALVE VOLTS

{GAINPCBACS}
SELE

Next: !p149, !f150

BYPASS CHECK

DISCHARGE AND DRAIN BOILER

Next: !p147, !f148

SENSOR MODULATION

DISCONNECT RED LEADS FROM THE NTC SENSOR

Next: !p158, !f159

AUTO FROST SENSOR

DISCONNECT RED LEADS FROM THE NTC SENSOR

Next: !p161, !f162

DHW DIVERTER VALVE VOLTS

{GAINPCBACS}
SELE

Next: !p185, !f186

DHW ISOLATOR

Next: p20, !f21

POWER TO CONTROL BOARD

{GAINPCBACS}
SELECTOR SWITCH TO DHW POSITION

Next: p25, f26

MAINS POWER IN

{GAINPCBACS}

Next: !p265, !f34

RESISTANCE CHECK PCB FUSE

REMOVE THE FUSE FROM THE HOLDER

Next: p267, !f272

RTC INPUT TERMINAL 3

{GAINPCBACS}
TIMER (IF FITTED) CALLING FOR HEAT

Next: p296, f297

CLOCK IN VOLTS INPUT TERMINAL 1

Next: p298, f299

LIVE IN TERMINAL L

Next: !p300, !f301

AIR PRESSURE SWITCH TUBES

Next: p322, !f323

VOLTS TO IGNITION PCB

{GAINPCBACS}
SELE

Next: p330, !f331

NTC RESISTANCE DEMAND

DISCONNECT RED LEADS FROM THE NTC SENSOR

Next: !p334, !f335

VOLTAGE CH FLOW SWITCH DURING DEMAND

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAX

Next: p351, !f352

AIR PRESSURE SWITCH TUBES

Next: p82, !f83

OVERHEAT THERMOSTAT RESISTANCE

REMOVE LEADS FROM OVERHEAT THERMOSTAT

Next: p216, !f78

FLAME SENSE LEAD

Next: !p102, !f103

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p111, !f112

GAS INLET PRESSURE

ATTACH U GAUGE TO GA

Next: !p113, !f114

DHW FLOW SWITCH RESISTANCE

{GAINPCBACS}
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p135, !f136

DHW DIVERTER VALVE OPERATION

CH TEMPERATURE SELEC

Next: p143, f144

GAS RATE

Next: !p151, !f152

DHW DIVERTER VALVE VOLTS

{GAINPCBACS}
SELE

Next: p153, !f154

CH OPERATION

SELECTOR SWITCH TO D

Next: !p145, f146

DIVERTER VALVE BODY

REMOVE THE DIVERTER VALVE HEAD

Next: !p155, !f156

PUMP LIMPET TEST

Next: p169, !f170

DHW DIVERTER VALVE OPERATION

CH TEMPERATURE SELEC

Next: p175, f176

PUMP LIMPET TEST

Next: p187, !f188

NTC RESISTANCE RAMP UP

DISCONNECT RED LEADS FROM THE NTC SENSOR

Next: p171, !f172

CH FILTER

DISCHARGE AND DRAIN BOILER

Next: !p173, !f174

PUMP LIMPET TEST

Next: p177, !f197

BYPASS CHECK

DISCHARGE AND DRAIN BOILER

Next: p179, !f180

CH FILTER

DISCHARGE AND DRAIN BOILER

Next: p181, !f182

DIVERTER VALVE BODY

REMOVE THE DIVERTER VALVE HEAD

Next: !p183, !f184

BYPASS CHECK

DISCHARGE AND DRAIN BOILER

Next: p189, !f190

DIVERTER VALVE BODY

REMOVE THE DIVERTER VALVE HEAD

Next: !p191, !f192

DHW INLET FILTER RESTRICTOR CARTRIDGE

DHW ISOLATOR VALVE OFF
DHW DISCHARGED AND DRAINED

Next: !p22, !f23

ELECTRODE LEADS

Next: !p217, !f218

GAS VALVE 1 VOLTAGE

SELECTOR SWITCH TO D

Next: p220, !f225

GAS VALVE RESISTANCE

DISCONNECT IGNITION PCB FROM GAS VALVE

Next: p221, !f222

GAS INLET PRESSURE

ATTACH U GAUGE TO GA

Next: !p292, !f224

MODULATING SOLENOID VOLTAGE

{GAINPCBACS}
SELE

Next: p227, !f228

GAS VALVE RESISTANCE

DISCONNECT IGNITION PCB FROM GAS VALVE

Next: p229, !f232

GAS INLET PRESSURE

ATTACH U GAUGE TO GA

Next: !p230, !f231

NTC RESISTANCE DEMAND

DISCONNECT RED LEADS FROM THE NTC SENSOR

Next: p241, !f242

OVERHEAT THERMOSTAT RESISTANCE

REMOVE LEADS FROM OVERHEAT THERMOSTAT

Next: p368, !f244

PUMP VOLTS

SELECTOR SWITCH TO D

Next: !p27, f266

DHW FLOW SWITCH RESISTANCE

{GAINPCBACS}
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p268, !f269

CH FLOW SWITCH RESISTANCE (OPEN CIRCUIT CHECK)

{GAINPCBACS}
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: p273, !f271

NTC RESISTANCE DEMAND

DISCONNECT RED LEADS FROM THE NTC SENSOR

Next: !p274, !f275

VOLTAGE CH FLOW SWITCH DROP

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAX

Next: p95, ?338, ?340

OBSERVATION PUMP RUNS CH

SELECTOR SWITCH TO CH AND DHW POSITION
CH TEMPERATURE SELECTOR TO MAX

Next: p355, f295

RTC OUTPUT TERMINAL 4

TIMER AND ROOM THERMOSTAT (IF FITTED) CALLING FOR HEAT

Next: !p304, !f305

CLOCK OUT VOLTS TERMINAL 2

TIMER (IF FITTED) CALLING FOR HEAT

Next: !p302, !f303

VOLTAGE CH FLOW SWITCH DROP

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAX

Next: p313, ?314, ?316

AIR PRESSURE SWITCH RESISTANCE

DISCONNECT THE WHITE LEADS FROM THE AIR PRESSURE SWITCH

Next: p320, f321

PUMP LIMPET CHECK

Next: !p318, !f319

FAN VOLTS

SELECTOR SWITCH TO OFF POSITION
CH TEMPERATURE SELECTOR TO MIN
DHW TEMPERATURE SELECTOR TO MAX

Next: !p328, f329

VENTURI

Next: p324, !f325

FLUE

Next: !p326, !f327

SWITCHED LIVE TO IGNITION PCB

SELECTOR SWITCH TO HW POSITION
CH TEMPERATURE SELECTOR TO MIN
DHW TEMPERATURE SELECTOR TO MAX

Next: p332, f333

LOCKOUT RESET SWITCH

REMOVE ONE OF THE WIRES FROM THE LOCKOUT RESET SWITCH

Next: !p336, !f337

PUMP LIMPET TEST

Next: !p343, !f344

PUMP LIMPET TEST

Next: p347, !f348

CH OPERATION

SELECTOR SWITCH TO D

Next: !p349, f350

BYPASS CHECK

DISCHARGE AND DRAIN BOILER

Next: !p353, !f354

VOLTAGE CH FLOW SWITCH DROP

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAX

Next: !p356, ?357, ?359

PUMP LIMPET CHECK

Next: p361, !f362

CH FILTER

DISCHARGE AND DRAIN BOILER

Next: !p363, !f364

CH FLOW SWITCH RESISTANCE (OPEN CIRCUIT CHECK)

{GAINPCBACS}
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p366, !f367

VOLTAGE CH FLOW SWITCH DROP

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAX

Next: !p369, ?374, ?376

CH FLOW SWITCH RESISTANCE (OPEN CIRCUIT CHECK)

{GAINPCBACS}
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p379, !f380

PUMP LIMPET CHECK

Next: !p382, !f383

CH FLOW SWITCH RESISTANCE (OPEN CIRCUIT CHECK)

{GAINPCBACS}
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p385, !f386

CH FLOW SWITCH RESISTANCE (OPEN CIRCUIT CHECK)

{GAINPCBACS}
DISCONNECT CONNECTOR X4 FROM THE PCB

Next: !p388, !f389

AIR PRESSURE SWITCH PROVING

SELECTOR SWITCH TO O

Next: p67, f68

ELECTRODE GAP

Next: !p92, !f93

SPARK OUTPUT

SELECTOR SWITCH TO O

Next: p69, f70

ELECTRODE GAP

Next: p71, !f72

IGNITION ELECTRODE

Next: p73, !f74

EARTH ELECTRODE

Next: !p75, !f76

VENTURI

Next: p84, !f85

FLUE

Next: !p86, !f87

NTC RESISTANCE DEMAND

DISCONNECT RED LEADS FROM THE NTC SENSOR

Next: p226, !f116

FLAME SENSE ELECTRODE

Next: p100, !f101

System Information

Total Tests: 247

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control