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:

4726737 FERROLI DOMICOMPACT F24 B

WARNING - IMPORTA

Next: &1, *

NO FAULT FOUND

Next: nff

4726737 FERROLI DOMICOMPACT F24 B

Next: &4, !f3

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &67, !f5

POWER UP

Next: &105, f68

DHW FLOW RATE

Next: &115, f106

FAN RUN DHW DEMAND

Next: &180, f116

FAN RUNS BURNER IGNITES AND ESTABLISHES DHW DEMAND

UNDO OUTLET PRESSURE TEST POINT
ATTACH U GAUGE TO OUTLET PRESSURE TEST POINT

Next: &257, ?181, ?183, ?185, ?187

OPERATION DHW

DHW TEMPERATURE CONT

Next: &992, ?258, ?260, ?262, ?264, ?266

PUMP RUNS CENTRAL HEATING DEMAND

PREHEAT OFF (ECO SHOWING IN DISPLAY)
CH THERMOSTAT TURNED TO MID POSITION

Next: &476, f434

OPERATION CH

PREHEAT SWITCHED OFF

Next: &nff, ?477, ?479, ?481, ?483, ?485, ?487

BOILER FIRES WITH NO DEMAND

OUTSIDE MODEL

Next: &nff, f843

SAFETY OVERHEAT LOCKOUT

OUT OF MODEL

Next: &nff, f607

DHW FAULTY SENSOR LOCKOUT

OUT OF MODEL

Next: &nff, f617

PRIMARY FAULTY SENSOR LOCKOUT

OUT OF MODEL

Next: &nff, f623

OPERATION OF SAFETY STATS AND HARNESS AT TEMP

ATTACH FGA TEMPERATU

Next: &nff, ?1104, ?1132, ?1159

FURTHER INVESTIGATION FUSE

Next: &nff, ?674, ?696

SET UP GAS PRESSURES

Next: &nff, !f744

FAULT CODES

Next: &nff, !f799

F5 FAULT CODE

OUT OF MODEL

Next: &nff, f963

F2 FAULT CODE

OUT OF MODEL

Next: &nff, f837

FAULT CODE F37

OUT OF MODEL

Next: &nff, f859

OBSERVATION PREHEAT IS IT SATISFACTORY

ENSURE NO CH DEMAND OR NO DHW DEMAND

Next: &433, f993

BLOWN STANDBY MODE

FUSE MAIN PCB F2

Next: End

POOR FLOW RATE

SERVICE VALVE INLET (WATER INLET)

Next: End

BOILER TEMP LOW SYSTEM TEMP LOWOPERATION DHW DHW COOL RADS COOL

GAS PRESSURE INLET

Next: End

COOL HOT WATER

GAS VALVE - SIEMENS

Next: End

OVERHEATOVERHEAT FURTHERBOILER OVER HEAT

THERMOSTAT 100 DEG C

Next: End

OVERHEATOVERHEAT FURTHER

PUMP ASSEMBLY

Next: End

BOILER SHUTS DOWN PREMATURLEY BOILER NOISEOVERHEATOVERHEAT FURTHER

Next: End

OVERHEAT

BURNER ASSEMBLY

Next: End

OVERHEAT

COMBUSTION CHAMBER

Next: End

OVERHEAT COMBUSTION CHAMBER

FLUE

Next: End

OVERHEAT 2

SWITCH - FLOW

Next: End

TURNED OFF

FLOW RETURN VALVE/S

Next: End

NO SHUT DOWN

GAS VALVE - SIEMENS

Next: End

OVERHEAT

SWITCH - FLOW

Next: End

OVERHEATOVERHEAT FURTHER

SENSOR 10K NTC

Next: End

OVERHEATOVERHEAT FURTHER

SENSOR - DHW C/W BRACKET

Next: End

NO HW

SWITCH - FLOW

Next: End

NO PUMPNO EXTERNAL CONTROL NO PUMP

HARNESS (MAIN)

Next: End

NO PUMP

HARNESS (MAIN)

Next: End

NO CH HW STUCK ON

SWITCH - FLOW

Next: End

NO DISLAY NO HOT WATER DEMAND

PCB

Next: End

NOT SWITCHING OFF

SWITCH - FLOW

Next: End

LINK TO F5

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT MODULATING UP

SENSOR - DHW C/W BRACKET

Next: End

NOT MODULATING UP

SENSOR 10K NTC

Next: End

HIGH RESISTANCE CAUSING BLANK DISPLAY

GAS VALVE - SIEMENS

Next: End

NO FAN

TUBE IMPULSE AIR PRESSURE

Next: End

INOPERABLE

SWITCH - FLOW

Next: End

SYSTEM PRESSURE

SYSTEM PRESSURE

Next: End

FAN RUNS DHW

SENSOR 10K NTC

Next: End

SENSOR TEMP DHW

HARNESS (MAIN)

Next: End

FAN RUNS

KIT - THERMOSTAT 100 DEG - SECURITY

Next: End

NO FAN

THERMOSTAT 100 DEG C

Next: End

APSF5

HARNESS (MAIN)

Next: End

NO VOLTAGE TO APSF5

PCB

Next: End

BLOCKED OR DAMAGED FAN RUNS SPARKING DOES NOT OCCURDHW NOT THEN COLDF5 FAULT CODEF5 FAULT

TUBE IMPULSE AIR PRESSURE

Next: End

BLOCKED OR DAMAGEDDHW NOT THEN COLDF5 FAULT CODEF5 FAULT

FAN ASSEMBLY (VENTURI)

Next: End

NO AIR PRESSUREDHW NOT THEN COLDF5 FAULT CODEF5 FAULTF5

EXCHANGER - HEAT MAIN (FLUE WAYS)

Next: End

NO APS PROVINGDHW NOT THEN COLDF5 FAULT CODEF5 FAULTF5

EXCHANGER - HEAT - SECONDARY (FLUEWAYS)

Next: End

BLOCKED OR DAMAGEDDHW NOT THEN COLDF5 FAULT CODEF5 FAULTF5

FLUE

Next: End

NO FANF5

TUBE IMPULSE AIR PRESSURE

Next: End

DHW RUNS HOT COLD

SENSOR 10K NTC - ADJUSTMENT

Next: End

DISPLAY

PCB

Next: End

NO DISPLAYNO RESPONSE TO DEMAND

PCB

Next: End

MECHANICAL PHYSICAL OPERATION

FAN ASSEMBLY

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

GAS PRESSURE INLET

Next: End

POOR SUPPLY

GAS PRESSURE INLET

Next: End

NEW MODELBLOCKED OR DAMAGED

BURNER ASSEMBLY

Next: End

GAP DAMAGE

ELECTRODE - IGNITION

Next: End

BLOCKED OR DAMAGED FAN RUNS SPARKING DOES NOT OCCUR

TUBE IMPULSE AIR PRESSURE

Next: End

BLOCKED OR DAMAGED

FAN ASSEMBLY (VENTURI)

Next: End

FAN RUNS SPARKING DOES NOT OCCUR

FAN ASSEMBLY

Next: End

NO SPARK

SPARK GAP

Next: End

CASE REMOVAL

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW COOL RADS COLD NO DEMAND

SENSOR - DHW C/W BRACKET

Next: End

DHW TOO HOT

SENSOR - DHW C/W BRACKET

Next: End

NEW MODEL FLUEWAYS

EXCHANGER - HEAT MAIN

Next: End

NO AIR PRESSURE

EXCHANGER - HEAT MAIN (FLUE WAYS)

Next: End

NO RECTIFICATION

TRAP - CONDENSATE

Next: End

NO SPARK

LEAD - IGNITION & FLAME SENSING

Next: End

DHW HOT THEN COLD

SENSOR - DHW C/W BRACKET

Next: End

DHW RUNS HOT THEN COLD

SENSOR 10K NTC

Next: End

NO SPARK

PCB

Next: End

FAN RUNS

PCB

Next: End

BURNER LIGHTS DOESNT ESTABLISH

BURNER ASSEMBLY

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

FLUE

Next: End

BURNER BAFFLES

EXCHANGER - HEAT - SECONDARY (FLUEWAYS)

Next: End

NO APS PROVING

EXCHANGER - HEAT - SECONDARY (FLUEWAYS)

Next: End

DHW COOL

SENSOR 10K NTC

Next: End

HOT THEN COLD

GAS VALVE - SIEMENS

Next: End

DHW TOO HOT

GAS VALVE - SIEMENS

Next: End

DHW COOL

PCB

Next: End

BLOCKED OR DAMAGED FAN RUNS SPARKING DOES NOT OCCURDHW NOT THEN COLD

TUBE IMPULSE AIR PRESSURE

Next: End

BLOCKED OR DAMAGEDDHW NOT THEN COLD

FAN ASSEMBLY (VENTURI)

Next: End

FAN RUNS SPARKING DOES NOT OCCURDHW NOT THEN COLD

FAN ASSEMBLY

Next: End

NO AIR PRESSUREDHW NOT THEN COLD

EXCHANGER - HEAT MAIN (FLUE WAYS)

Next: End

NO APS PROVINGDHW NOT THEN COLD

EXCHANGER - HEAT - SECONDARY (FLUEWAYS)

Next: End

BLOCKED OR DAMAGEDDHW NOT THEN COLD

FLUE

Next: End

UNDER PRESSURE

EXPANSION VESSEL 8 LITRE

Next: End

FOR TYPE DIAG PROCEDURE

Z DIRECTION CHOICE OR CONTINUE

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

GAS PRESSURE INLET

Next: End

BOILR SHUTS DOWN PREMATURELY CHOPERATION

PUMP ASSEMBLY

Next: End

BOILER SHUTS DOWN PREMATURLEY BOILER NOISY

Next: End

BOILER TO TEMP RADS COOL

PUMP ASSEMBLY

Next: End

CH OPERATION

Next: End

BOILER TEMP LOW SYSTEM LOW

SENSOR 10K NTC

Next: End

BOILER NOISY CH

SENSOR 10K NTC

Next: End

FROST

SENSOR 10K NTC

Next: End

NO VOLTAGE TO APS

PCB

Next: End

BOILER GOES TO OVERHEATOVERHEAT

THERMOSTAT 100 DEG C

Next: End

NO PUMP DHWNO DHW PUMPDHW LOCKOUTDHW LOCKOUT

SENSOR - DHW C/W BRACKET

Next: End

CH LOCKOUT

SENSOR 10K NTC

Next: End

PUMP

HARNESS (MAIN)

Next: End

APS

HARNESS (MAIN)

Next: End

GAS VALVE

HARNESS (MAIN)

Next: End

OPEN OR SHORT CIRCUITFURTHER INVESTIGATION FUSE F1

GAS VALVE SOLENOID MODULATING

Next: End

FURTHER INVESTIGATION FUSE F1

PUMP ASSEMBLY

Next: End

OPEN OR SHORT CIRCUITFURTHER INVESTIGATION FUSE F1F1 OR F2 ON PCB

GAS VALVE SOLENOID MODULATING

Next: End

FURTHER INVESTIGATION FUSE F1F1 OR F2 ON PCB

PUMP ASSEMBLY

Next: End

FURTHER INVESTIGATION FUSE F1

FAN ASSEMBLY

Next: End

FURTHER INVESTIGATION FUSE F1F2

FAN ASSEMBLY

Next: End

NO CH

SWITCH - FLOW

Next: End

LOCKOUT

KIT - THERMOSTAT 100 DEG - SECURITY

Next: End

BLOWN STAND BY MODE AT POWER UP

MAIN FUSE FUSED SPUR F1

Next: End

UNABLE TO SET

BURNER PRESSURE ADJUSTMENT

Next: End

F2 F3

GAS VALVE - SIEMENS

Next: End

FAULT CODES

Z DIRECTION CHOICE OR CONTINUE

Next: End

F2

GAS VALVE - SIEMENS

Next: End

F37 FAULT CODE

SYSTEM PRESSURE

Next: End

F37 FAULT CODE

LOW WATER PRESSURE SWITCH

Next: End

OPERATION CH OK TOO COLD BEFORE REFIRE

Next: End

BOILER GETS TOO COOL

SENSOR 10K NTC

Next: End

OPERATION CH OK NO REFIRE

Next: End

CH NO DEMAND

Next: End

FUSE1

GAS VALVE - SIEMENS

Next: End

DAMAGED

INJECTOR 1.30 - MAIN

Next: End

BOILER FIRES NO DEMAND

INTEGRAL CLOCK

Next: End

BOILER GOES TO OVERHEATOVERHEATOVERHEAT

THERMOSTAT 100 DEG C

Next: End

LOCKOUTOVERHEAT

KIT - THERMOSTAT 100 DEG - SECURITY

Next: End

UNABLE TO SET 2

GAS VALVE - SIEMENS

Next: End

DHW NOISY

GAS VALVE - SIEMENS

Next: End

FLAME ROLL

BURNER ASSEMBLY

Next: End

CONTAMINATION COMBSTION AIR

FLUE SEALS

Next: End

AIR INTAKE CONTAMINATION

COMBUSTION CHAMBER

Next: End

NO RECTIFICATION

ELECTRODE - IGNITION

Next: End

NO RETIFICATION

LEAD - IGNITION & FLAME SENSING

Next: End

NOT LIGHTING

LEAD - IGNITION & FLAME SENSING

Next: End

BLOWN STANDBY MODE AT POWER UP

FUSE MAIN PCB

Next: End

FURTHER IN VESTIGATION F3

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW COOL

BURNER PRESSURE ADJUSTMENT

Next: End

MODUREG VOLTAGE

HARNESS (MAIN)

Next: End

HEAT EXCHANGER PRIMARY

EXCHANGER - HEAT MAIN

Next: End

SAFETY STATBOILER OVER HEAT

HARNESS (MAIN)

Next: End

FAN DOES NOT RUN

FAN ASSEMBLY

Next: End

RESCRICTION

Next: End

OVERHEATBOILER OVER HEAT

KIT - THERMOSTAT 100 DEG - SECURITY

Next: End

FAN ASS

HARNESS (MAIN)

Next: End

BOILER NOT SHUTTING DOWN ON TEMP

PCB

Next: End

FAN RUNS 2EXTERNAL CONTROLSNO EXTERNAL CONTROL NO PUMP

Next: End

NO PUMPNO EXTERNAL CONTROL NO PUMP

PCB

Next: End

NO PUMP

Next: End

FAN RUNS 2EXTERNAL CONTROLS

Next: End

NO PUMP

PCB

Next: End

FAN NOT RUNNING AND NO LED

FAN ASSEMBLY

Next: End

FAILS PREHEAT

PCB

Next: End

FAN DOES NOT RUNF5

FAN ASSEMBLY

Next: End

FAN ASSF5

HARNESS (MAIN)

Next: End

MODUREG VOLTAGE

PCB

Next: End

OVERHEAT INVESTIGATION PAGE

BOILER OVERHEAT

Next: End

OVERHEAT INVESTIGATION PAGE 2

BOILER OVERHEAT

Next: End

FAULTY NEUTRAL ON PCB

PCB

Next: End

STUCK ON NO FAN

PRESSURE SWITCH - HUBA

Next: End

NO FAN

LOW WATER PRESSURE SWITCH

Next: End

SENSOR PRIMARY FAN RUNS

HARNESS (MAIN)

Next: End

FAN RUNS DHW DEMAND

SENSOR - DHW C/W BRACKET

Next: End

NO FAN

PCB

Next: End

OVER HEAT STAT FAN RUNS

HARNESS (MAIN)

Next: End

NO AIR FLOWF5

PRESSURE SWITCH - HUBA

Next: End

F5F5 FAULTF5

FAN ASSEMBLY

Next: End

F5 FAULTY NEUTRAL

PCB

Next: End

NO FANF5

PCB

Next: End

STUCK ON NO FANF5

PRESSURE SWITCH - HUBA

Next: End

DHW RUNS HOT THEN COLD

PCB

Next: End

SPARKING OCCURS BURNER DOES NOT LIGHT

GAS VALVE - SIEMENS

Next: End

LEAD NO SPARK

ELECTRODE - IGNITION

Next: End

HIGH_LOW ADJUSTMENT

BURNER PRESSURE ADJUSTMENT

Next: End

PUMP RUNNING ON HW DEMAND

PCB

Next: End

KETTLING

EXCHANGER - HEAT MAIN

Next: End

BLOCKED OR DAMAGED

FLUE

Next: End

NO RECTIFICATION

PCB

Next: End

DHW TOO HOT

PCB

Next: End

POOR DHW TEMP RISE

EXCHANGER - HEAT MAIN

Next: End

PUMP RUNS

PUMP ASSEMBLY

Next: End

NO APS PROVINGDHW HOT THEN COLD

PRESSURE SWITCH - HUBA

Next: End

NO AIR FLOW

PRESSURE SWITCH - HUBA

Next: End

EXPANSION CONNECTION

BLOCKAGES

Next: End

LOW GAS RATE CH OPERATION

INJECTOR 1.30 - MAIN

Next: End

CH OPERATION NOISY

EXCHANGER - HEAT MAIN

Next: End

CH OPERATION NOISEY

Next: End

CH OPERATION BOILER UP TO TEMP RADS COLD

Next: End

BOILER FIRES NO DEMAND

FROST PROTECTION

Next: End

BOILER TEMP LOW SYSTEM LOW

PCB

Next: End

BOILER NOISY

PCB

Next: End

FLUE OVERHEAT

HARNESS (MAIN)

Next: End

DHW THERMISTOR

HARNESS (MAIN)

Next: End

SENSOR LOCKOUT

HARNESS (MAIN)

Next: End

OVERHEAT

PCB

Next: End

DHW SENSOR FAULTY

PCB

Next: End

CH SENSOR FAULTY

PCB

Next: End

SUPPLY FAULT AT POWER UP

Next: End

MAINS FUSE

FUSE GONE PCB

Next: End

MAINS FUSEF2

FUSE GONE PCB

Next: End

FURTHER INVESTIGATION F1

Z DIRECTION CHOICE OR CONTINUE

Next: End

F1

HARNESS (MAIN)

Next: End

FAN F1

HARNESS (MAIN)

Next: End

F2 FAN

HARNESS (MAIN)

Next: End

SOLENIOD

HARNESS (MAIN)

Next: End

PUMP F3

HARNESS (MAIN)

Next: End

GAS VALVE SOLENIOD MAIN

HARNESS (MAIN)

Next: End

GV SOLENIOD MAIN

HARNESS (MAIN)

Next: End

F2 F3 FURTHER INVESTIGATION

HARNESS (MAIN)

Next: End

FURTHER INVESTIGATION LED PCB FAULT TO FAN RUNS BURNER IGNITES AND ESTABLISHES

Z DIRECTION CHOICE OR CONTINUE

Next: End

NO RESET

PCB

Next: End

PREHEAT

NORMAL OPERATION

Next: End

F37 FAULT CODE

PCB

Next: End

F37 FAULT CODE

HARNESS (MAIN)

Next: End

OPERATION CH TOO LONG FOR REFIRECIRCULATION

Next: End

SYSTEM GETS TOO COOL

PCB

Next: End

CH NO DMAND

PCB

Next: End

CH NO DEMAND2

PCB

Next: End

PUMP RUNS

FILTER - DHW

Next: End

POOR FLOW RATE

SWITCH - FLOW

Next: End

OVERHEATOVERHEAT

PCB

Next: End

FLUE OVERHEATOVERHEAT

HARNESS (MAIN)

Next: End

UNABLE TO SET PRESSURE

GAS VALVE - SIEMENS

Next: End

DHW COOL 2

BURNER PRESSURE ADJUSTMENT

Next: End

DHW NOISY

BURNER PRESSURE ADJUSTMENT

Next: End

FLAME BAFFLING

FLUE

Next: End

BOCKED OR DAMAGED SPARKING OCCURS BURNER DOESNOT IGNITE

INJECTOR 1.30 - MAIN

Next: End

FURTHER IN VESTIGATION F2

Z DIRECTION CHOICE OR CONTINUE

Next: End

BOILER CUTS OUT ON FAULT CODE BEFORE REACHING 82 DEGREES

CHARACTERISTIC TEST FROM OPERATION OF SAFETY STATS AND HARNESS AT TEMP

Next: p1154

FLOW SWITCH ASSEMBLY CLEAR

CHARACTERISTIC TEST FROM FLOW SWITCH ASSEMBLY

Next: !p114

BOILER TEMPERATURE EXCEEDS 92 DEGREES AND BOILER STILL FIRING

CHARACTERISTIC TEST FROM OPERATION OF SAFETY STATS AND HARNESS AT TEMP

Next: p1217

BOILER TEMP RISING RAPIDLY

CHARACTERISTIC TEST FROM OPERATION OF SAFETY STATS AND HARNESS AT TEMP

Next: p1202

MAINS VOLTAGE ABSENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1328

MAINS VOLTAGE PRESENT ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1327

MAINS VOLTAGE ABSENT ON TEST 1

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1374

MAINS VOLTAGE PRESENT ON TEST 2

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1373

FAN RUNS SPARKING DOES NOT OCCUR

CHARACTERISTIC TEST FROM FAN RUNS BURNER IGNITES AND ESTABLISHES DHW DEMAND

Next: p182

FAN RUNS SPARKING OCCURS BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM FAN RUNS BURNER IGNITES AND ESTABLISHES DHW DEMAND

Next: p184

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM FAN RUNS BURNER IGNITES AND ESTABLISHES DHW DEMAND

Next: p186

BURNER IGNITES BUT BAFFLES OUT OR LIFTS OFF

CHARACTERISTIC TEST FROM FAN RUNS BURNER IGNITES AND ESTABLISHES DHW DEMAND

Next: p188

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p259

DHW COOL / TEMP RISE POOR

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p261

DHW COOL RADS HOT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: !p347

DHW NOISY KETTLING

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p349

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p267

BOILER NOISY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p478

BOILER UP TO TEMP RADS COLD

CHARACTERISTIC TEST FROM OPERATION CH

Next: p537

BOILER TEMP LOW SYSTEM TEMP LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p482

OPERATION SATISFACTORY BUT BOILER GOES TO OVER HEAT

CHARACTERISTIC TEST FROM OPERATION CH

Next: p897

OPERATION SATISFACTORY BOILER AND SYSTEM REACHES TEMP BUT GETS TOO COOL BEFORE REFIRING

CHARACTERISTIC TEST FROM OPERATION CH

Next: p866

SYSTEM PRESSURE RISE EXCESSIVE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p488

TEMP DIFF CORRECT LOCAL BOILING

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW RETURN (P=DIF NOK NOISY NSD)

Next: !p534

DIFFERENTIAL OK

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL FLOW RETURN (P=DIF NOK NOISY NSD)

Next: !p536

FUSE 1 (3AMP FUSED SPUR)

CHARACTERISTIC TEST FROM FURTHER INVESTIGATION FUSE

Next: p675

FURTHER INVESTIGATION F2 OR F3 ON PCB

CHARACTERISTIC TEST FROM FURTHER INVESTIGATION FUSE

Next: p697

INLET FILTER BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM FLOW SWITCH ASSEMBLY

Next: !p885

11/07/2018 13:48:57 1807_1_50_1 20/07/2018 14:02:50

11/07/2018 14:51:09

Next: End

FUSE FURTHER INVESTIGATION FUSE 2 PCB

Next: !p101, !f102

SERVICE VALVE

Next: p107, !f108

VOLTAGE MODUREG

DHW THERMOSTAT TO MAX
RUN DHW TAP ON MAXIMUM FLOW RATE

Next: p1088, f1093

VOLTAGE MODUREG FROM PCB

{GAINPCBACS}
DHW THERMOSTAT TO MAX
RUN DHW TAP ON MAXIMUM FLOW RATE

Next: !p1094, f1308

VOLTAGE FAN (AT FAN)

Next: !p117, f118

INSPECTION FLUE

Next: !p1173, !f1174

VOLTAGE FAN (AT PCB)

GAIN ACCESS TO CONTROL BOX AND CONNECTOR X7

Next: !p119, ?1324, ?1326

LINK INTEGRAL CLOCK CONNECTIONS

REMOVE WHITE WIRES F

Next: !p1241, f1242

RESISTANCE TIMER HARNESS

REMOVE CONNECTOR X2 FROM PCB AND THE
CONNECTIONS 3 & 5 (WHITE WIRES) FROM INTEGRAL TIMER

Next: !p1243, !f1244

LINK INTEGRAL CLOCK CONNECTIONS

REMOVE WHITE WIRES F

Next: !p1247, f1248

RESISTANCE TIMER HARNESS

REMOVE CONNECTOR X2 FROM PCB AND THE
CONNECTIONS 3 & 5 (WHITE WIRES) FROM INTEGRAL TIMER

Next: !p1249, !f1250

VOLTAGE FAN (AT FAN)

Next: !p1276, f1277

VOLTAGE FAN (AT PCB)

GAIN ACCESS TO CONTROL BOX AND CONNECTOR X7

Next: !p1278, ?1370, ?1372

VOLTAGE FROM PRESSURE SWITCH DURING OPERATION

{GAINPCBACS}
CONNECTOR X4 IS LOCATED ON LEFT HAND SIDE OF PCB

Next: p1379, !f1307

RESISTANCE SENSOR DHW

REMOVE BLUE LEADS FROM DHW SENSOR

Next: p1309, !f1310

INSPECTION TUBES AIR PRESSURE

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: !p1331, !f1332

SYSTEM PRESSURE

Next: !p1337, !f1338

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: !p1341, !f1342

RESISTANCE SENSOR TEMP DHW

REMOVE BLUE LEADS FROM DHW SENSOR

Next: !p1345, !f1346

RESISTANCE SENSOR FLUE OVERHEAT STAT

DISCONNECT THE GREY LEADS FROM THE FLUE OVERHEAT THERMOSTAT

Next: p1349, !f1350

INSPECTION TUBES AIR PRESSURE

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: p1360, !f1361

INSPECTION TUBES AIR PRESSURE

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: !p1377, !f1378

PRESSURE GAS INLET

UNDO INLET PRESSURE TEST POINT
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: !p923, !f206

PRESSURE GAS INLET

UNDO INLET PRESSURE TEST POINT
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p221, !f222

AIR PRESSURE SWITCH PROVING AT APS AIR FLOW TEST

SET PERFORMANCE TEST

Next: p233, f234

INSPECTION TUBES AIR PRESSURE

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: p235, !f236

CAN HIGH LOW BURNER PRESSURE BE ADJUSTED

DHW TEMPERATURE CONT

Next: !p270, !f426

CAN HIGH LOW BURNER PRESSURE BE ADJUSTED

DHW TEMPERATURE CONT

Next: !p926, !f427

VOLTAGE PUMP AT (PCB)

{GAINPCBACS}
PREHEAT OFF (ECO SHOWING IN DISPLAY)

Next: p435, f773

PRESSURE GAS BURNER

DHW THERMOSTAT TURNE

Next: !p507, !f924

IS BOILER IN FROST PROTECTION

Next: !p575, f576

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: p577, !f578

REMOVE WIRE EXTERNAL CONTROLS DOES BOILER STILL FIRE

REMOVE ONE OR BOTH WIRES FROM EXTERNAL CONTROLS CONNECTION

Next: !p875, !f876

CAN BOILER BE RESET

ALLOW BOILER TO COOL

Next: !p1322, f609

RESISTANCE SAFETY STATS AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR FROM X4 ON THE PCB

Next: !p667, f611

RESISTANCE SAFETY THERMOSTAT

DISCONNECT THE GREY LEADS FROM THE OVERHEAT STAT

Next: p612, !f613

RESISTANCE SENSOR TEMP DHW AND HARNESS

DISCONNECT CONNECTOR X2 ON THE PCB

Next: !p668, f619

RESISTANCE SENSOR DHW

REMOVE BLUE LEADS FROM DHW SENSOR

Next: !p664, !f621

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT X4 PLUG ON THE PCB

Next: !p669, f625

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: !p665, !f627

RESISTANCE GAS VALVE SOLENOID MAIN

REMOVE THE LEADS FROM THE GAS VALVE

Next: !p741, !f880

VOLTAGE MAINS POWER INPUT TO APPLIANCE

GAIN ACCESS TO CONNECTOR X1 ON PCB

Next: p69, f70

RESISTANCE GAS VALVE SOLENOID MODULATING

REMOVE THE LEADS FROM THE GAS VALVE

Next: !p738, !f683

RESISTANCE PUMP

Next: !p735, !f687

RESISTANCE GAS VALVE SOLENOID MAIN

REMOVE THE LEADS FROM THE GAS VALVE

Next: !p742, !f797

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p71, f72

RESISTANCE GAS VALVE SOLENOID MODULATING

REMOVE THE LEADS FROM THE GAS VALVE

Next: !p796, !f705

RESISTANCE PUMP

Next: !p740, !f709

FUSE FURTHER INVESTIGATION F1

Next: !p73, !f74

RESISTANCE FAN

Next: !p736, !f722

RESISTANCE FAN

Next: !p737, !f732

IS DHW FLOW SWITCH OPEN CIRCUIT

DHW TAP OFF
DISCONNECT THE X2 CONNECTOR FROM THE PCB

Next: p1238, !f1251

DOES BURNER EXTINGUISH AFTER DEMAND

PREHEAT OFF (ECO IN DISPLAY)

Next: !p841, !f840

IS BOILER IN PREHEAT

NO DEMAND

Next: !p857, f574

SYSTEM PRESSURE

Next: p861, !f860

RESISTANCE LOW WATER PRESSURE SWITCH

DISCONNECT THE BLACK LEADS FROM THE PRIMARY CIRCUIT SWITCH

Next: !p864, !f865

INSPECTION EXTERNAL BYPASS

Next: !p869, !f870

RESISTANCE SAFETY STATS AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR FROM X4 ON THE PCB

Next: !p900, f901

RESISTANCE SAFETY THERMOSTAT

DISCONNECT THE GREY LEADS FROM THE OVERHEAT STAT

Next: p902, !f903

CAN HIGH LOW BURNER PRESSURE BE ADJUSTED

DHW TEMPERATURE CONT

Next: !p928, !f929

RESISTANCE FUSE ( APPLIANCE F1)

REMOVE FUSE FROM PCB

Next: p95, f96

FUSE FURTHER INVESTIGATION FUSE 1 PCB

Next: !p97, !f98

FAN RUN DHW DEMAND

Next: p1353, f1275

RESISTANCE FLOW SWITCH

DISCONNECT THE TWO PINK LEADS ON THE DHW FLOW SWITCH.

Next: !p1258, !f1259

FLOW SWITCH ASSEMBLY

DHW DISCHARGED AND DRAINED
REMOVE THE DHW FLOW SWITCH GROUP ASSEMBLY

Next: !p886, ?113, ?884

PRESSURE GAS INLET

UNDO INLET PRESSURE TEST POINT
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1089, !f1090

CAN HIGH LOW BURNER PRESSURE BE ADJUSTED

DHW TEMPERATURE CONT

Next: !p1091, !f1092

INSPECTION GAS VALVE SHUT DOWN

CH DEMAND OFF
PREHEAT SWITCHED OFF (ECO IN DISPLAY)

Next: p1229, !f1215

RESISTANCE FLUE OVERHEAT

DISCONNECT BOTH OF THE GREY LEADS FROM THE FLUE OVERHEAT STAT

Next: p1155, f1172

RESISTANCE SAFETY THERMOSTAT

DISCONNECT THE GREY LEADS FROM THE OVERHEAT STAT

Next: !p1157, !f1158

PUMP LIMPET TEST

Next: p1161, !f1162

EXTERNAL BYPASS SYSTEM

Next: p1164, !f1165

INSPECTION BURNER

REMOVE THE BURNER

Next: p1166, !f1168

INSPECTION COMBUSTION CHAMBER

REMOVE FRONT COVER
REMOVE INNER COMBUSTION COVER

Next: !p1170, !f1171

IS DHW FLOW SWITCH OPEN CIRCUIT

DHW TAP OFF
DISCONNECT THE X2 CONNECTOR FROM THE PCB

Next: p1160, !f1201

ARE FLOW RETURN VALVES FULLY OPEN

Next: p1191, !f1214

IS DHW FLOW SWITCH OPEN CIRCUIT

DHW TAP OFF
DISCONNECT THE X2 CONNECTOR FROM THE PCB

Next: p1134, !f1227

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: p1230, !f1231

RESISTANCE SENSOR DHW

REMOVE BLUE LEADS FROM DHW SENSOR

Next: !p1232, !f1233

EXTERNAL CONTROLS FITTED ?

Next: p1239, f1240

LINK EXTERNAL CONTROLS

REMOVE ROOM STAT WIR

Next: !p1245, f1246

VOLTAGE FAN (AT FAN)

Next: !p1253, !f1254

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: !p1311, !f1312

OBSERVATION DISCONNECT GAS VALVE - DISPLAY ILLUMINATES?

REMOVE CONNECTOR FROM GAS VALVE AND MAKE SAFE

Next: p174, !f1321

RESISTANCE PRESSURE SWITCH

Next: p1329, f1330

RESISTANCE FLOW SWITCH

DISCONNECT THE TWO PINK LEADS ON THE DHW FLOW SWITCH.

Next: p1333, !f1334

RESISTANCE LOW WATER PRESSURE SWITCH

DISCONNECT THE BLACK LEADS FROM THE PRIMARY CIRCUIT SWITCH

Next: p1335, f1336

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT X4 PLUG ON THE PCB

Next: p1339, f1340

RESISTANCE SENSOR TEMP DHW AND HARNESS

DISCONNECT CONNECTOR X2 ON THE PCB

Next: p1343, f1344

RESISTANCE SENSOR OVERHEATS AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR FROM X4 ON THE PCB

Next: !p1347, f1348

RESISTANCE SENSOR OVERHEAT STAT

DISCONNECT THE GREY LEADS FROM THE OVERHEAT STAT

Next: !p1351, !f1352

AIR PRESSURE SWITCH PROVING AT APS AIR FLOW TEST

SET PERFORMANCE TEST

Next: p1354, f1359

AIR PRESSURE SWITCH HARNESS CONTINUITY

REMOVE LEADS FROM AIR PRESSURE SWITCH AND REMOVE CONNECTION X4 FROM PCB

Next: p1355, !f1356

VOLTAGE SUPPLY FROM PCB TO APS

GAIN ACCESS TO CONNECTOR X4 ON PCB

Next: !p1357, !f1358

INSPECTION VENTURI

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: p1363, !f1362

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

Next: p1364, !f1365

INSPECTION CONDENSING HEAT EXCHANGER FLUEWAYS

REMOVE COMBUSTION COVER AND FAN ASSEMBLY

Next: p1366, !f1367

INSPECTION FLUE

Next: !p1368, !f1369

RESISTANCE PRESSURE SWITCH

Next: !p1375, f1376

ADJUST SENSOR PRIMARY POSITION

Next: !p1380, !f1381

PUMP RUNS CENTRAL HEATING DEMAND

PREHEAT OFF (ECO SHOWING IN DISPLAY)
CH THERMOSTAT TURNED TO MID POSITION

Next: p175, !f176

RESISTANCE FLOW SWITCH

DISCONNECT THE TWO PINK LEADS ON THE DHW FLOW SWITCH.

Next: p1252, !f1234

AIR PRESSURE SWITCH PROVING AT PCB

GAIN ACCESS TO PCB (

Next: p231, f232

PRESSURE GAS BURNER IGNITION

UNDO BURNER PRESSURE TEST POINT
ATTACH PRESSURE GAUGE TO THE BURNER PRESSURE TEST POINT

Next: p219, f220

PRESSURE GAS BURNER IGNITION

UNDO BURNER PRESSURE TEST POINT
ATTACH PRESSURE GAUGE TO THE BURNER PRESSURE TEST POINT

Next: p365, f204

INSPECTION BURNER

REMOVE THE BURNER

Next: p937, !f930

INSPECTION FAN MECHANICAL

REMOVE FAN

Next: p355, !f196

INSPECTION BURNER

REMOVE THE BURNER

Next: p227, !f228

VOLTAGE GAS VALVE (AT PCB)

{GAINPCBACS}
REMOVE CONNECTOR FROM GAS VALVE AND MAKE SAFE

Next: p223, !f399

RESISTANCE GAS VALVE HARNESS

REMOVE X7 CONNECTOR FROM PCB AND PLUG FROM GAS VALVE

Next: !p225, !f666

INSPECTION ELECTRODE AND GAP

Next: p959, !f230

SPARKING OCCUR AT PCB

REMOVE SPARK LEAD FR

Next: p251, !f398

AIR PRESSURE SWITCH HARNESS CONTINUITY

REMOVE LEADS FROM AIR PRESSURE SWITCH AND REMOVE CONNECTION X4 FROM PCB

Next: p247, !f663

INSPECTION VENTURI

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: p237, !f238

INSPECTION FAN

REMOVE FAN

Next: p360, !f240

VOLTAGE SUPPLY FROM PCB TO APS

GAIN ACCESS TO CONNECTOR X4 ON PCB

Next: !p474, !f592

SPARK GAP AND CONDITION

Next: p253, !f254

RESISTANCE IGNITION LEAD

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: !p255, !f383

RESISTANCE SENSOR DHW

REMOVE BLUE LEADS FROM DHW SENSOR

Next: p338, !f339

BURNER PRESSURE

THERMOSTAT TURNED TO MAX
CONNECT A U-GAUGE TO THE BURNER GAS PRESSURE TEST POINT

Next: p316, f1082

IS HIGH LOW BURNER PRESSURE CORRECT

DHW TEMPERATURE CONT

Next: p392, f269

RESISTANCE SENSOR DHW

REMOVE BLUE LEADS FROM DHW SENSOR

Next: p419, !f319

IS HIGH LOW BURNER PRESSURE CORRECT

DHW TEMPERATURE CONT

Next: !p417, f341

BURNER PRESSURE

THERMOSTAT TURNED TO MAX
CONNECT A U-GAUGE TO THE BURNER GAS PRESSURE TEST POINT

Next: !p350, f927

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

Next: p410, !f357

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

Next: p361, !f362

INSPECTION CONDENSING HEAT EXCHANGER FLUEWAYS

REMOVE COMBUSTION COVER AND FAN ASSEMBLY

Next: !p363, !f415

INSPECTION CONDENSATE

Next: p401, !f378

RESISTANCE SENSOR DHW

REMOVE BLUE LEADS FROM DHW SENSOR

Next: p393, !f394

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: p457, !f396

INSPECTION ELECTRODE AND GAP

Next: p951, !f957

INSPECTION BURNER

REMOVE THE BURNER

Next: p404, !f405

INSPECTION FLUE

Next: !p406, !f407

INSPECTION HEAT EXCHANGER CONDENSING (FLUE WAYS)

REMOVE COMBUSTION COVER AND FAN ASSEMBLY

Next: p932, !f414

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: p429, !f421

DOES BURNER PRESSURE STAY ON MAX

THERMOSTAT TURNED TO

Next: !p430, !f431

VOLTAGE PUMP AT (PUMP)

REMOVE THE COVER FROM THE PUMP
APPLY DEMAND

Next: !p455, !f662

IS DISPLAY SHOWING FAULT CODE AS BOILER CUTS OUT

Next: p460, f1305

INSPECTION TUBES AIR PRESSURE

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: p461, !f462

INSPECTION VENTURI

REMOVE SILICONE RUBBER TUBES FROM THE VENTURI

Next: p463, !f464

INSPECTION FAN

REMOVE FAN

Next: p465, !f466

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

Next: p467, !f468

INSPECTION CONDENSING HEAT EXCHANGER FLUEWAYS

REMOVE COMBUSTION COVER AND FAN ASSEMBLY

Next: p471, !f470

INSPECTION FLUE

Next: !p473, !f472

PUMP LIMPET TEST

Next: p523, !f524

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p503, !f504

EXPANSION VESSEL PRESSURE

BOILER DISCHARGED

Next: !p489, !f490

GAS RATE

Next: p505, f506

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: !p591, !f542

INSPECTION EXTERNAL BYPASS

Next: p525, !f526

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: p527, !f543

GAS RATE

Next: p529, !f881

TEMPERATURE DIFFERENTIAL FLOW RETURN (CH)

PLACE TELEGAN CLAMPS ON THE FLOW AND RETURN PIPES CLOSE TO THE COMBUSTION CHAMBER

Next: !p594, ?533, ?535

PUMP LIMPET TEST

Next: p538, !f539

INSPECTION EXTERNAL BYPASS

Next: !p540, !f541

IS DHW FLOW SWITCH OPEN CIRCUIT

DHW TAP OFF
DISCONNECT THE X2 CONNECTOR FROM THE PCB

Next: p579, !f733

DOES BOILER RUN OFF INTEGRAL TIMER

Next: p581, f582

REMOVE WIRE INTEGRAL TIMER DOES BOILER STILL FIRE

REMOVE THE TWO WHITE WIRES ON TERMINALS 3 AND 4 OF THE INTEGRAL TIMER AND MAKE SAFE

Next: !p877, !f883

RESISTANCE FLUE OVERHEAT

DISCONNECT BOTH OF THE GREY LEADS FROM THE FLUE OVERHEAT STAT

Next: !p660, !f734

RESISTANCE GAS VALVE SOLENOID MAIN AND HARNESS

{GAINPCBACS}
DISCONNECT PLUG MARKED X7 FROM THE PCB

Next: p676, f677

RESISTANCE GAS VALVE SOLENOID MODULATING AND HARNESS

REMOVE CONNECTION X2 FROM THE PCB

Next: p680, f681

RESISTANCE PUMP AND HARNESS

{GAINPCBACS}
DISCONNECT PLUG MARKED X3 FROM PCB

Next: p718, f685

FAN RUNS DHW DEMAND

Next: p75, f94

RESISTANCE GAS VALVE SOLENOID MAIN AND HARNESS

{GAINPCBACS}
DISCONNECT PLUG MARKED X7 FROM THE PCB

Next: p698, f699

RESISTANCE GAS VALVE SOLENOID MODULATING AND HARNESS

REMOVE CONNECTION X2 FROM THE PCB

Next: p702, f703

RESISTANCE PUMP AND HARNESS

{GAINPCBACS}
DISCONNECT PLUG MARKED X3 FROM PCB

Next: p728, f707

RESISTANCE FAN AND HARNESS

DISCONNECT PLUG MARKED X7 FROM THE PCB

Next: !p719, f720

RESISTANCE FAN AND HARNESS

DISCONNECT PLUG MARKED X7 FROM THE PCB

Next: !p729, f730

FURTHER INVESTIGATION DISPLAY FAULT

Next: !p83, !f173

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR X2 FROM PCB

Next: !p862, f863

TEMPERATURE SYSTEM FLOW

ATTACH TEMP CLAMPS T

Next: p867, f868

RESISTANCE SENSOR PRIMARY

REMOVE RED LEADS FROM CH SENSOR

Next: p871, !f872

INSPECTION EXTERNAL BYPASS

Next: !p873, !f874

CAN BOILER BE RESET

ALLOW BOILER TO COOL

Next: !p1323, f899

RESISTANCE FLUE OVERHEAT

DISCONNECT BOTH OF THE GREY LEADS FROM THE FLUE OVERHEAT STAT

Next: !p904, !f905

INSPECTION FLUE SEALS

Next: !p950, !f934

INSPECTION COMBUSTION CHAMBER

REMOVE FRONT COVER
REMOVE INNER COMBUSTION COVER

Next: p189, !f949

RESISTANCE FUSE ( APPLIANCE F2)

REMOVE FUSE FROM PCB

Next: p1313, f100

RESISTANCE ELECTRODE LEAD

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p402, !f958

RESISTANCE ELECTRODE LEAD

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: !p961, !f962

System Information

Total Tests: 452

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control