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:

4707561 BAXI PLATINUM 2 COMBI 28 GA

WARNING - IMPORTA

Next: &473, *

NO FAULT FOUND

Next: nff

BOILER ENTERS STANDBY MODE

ENSURE THERE ARE NO DEMANDS

Next: &79, ?174, ?650

POWER UP

NO DEMANDS

Next: &26, f58

DHW FLOW RATE

Next: &449, f80

FAN RUN DHW DEMAND

ENSURE DHW MODE IS TURNED ON IN USER CONTROL

Next: &190, f100

BURNER IGNITES AND ESTABLISHES

ENSURE DHW MODE IS TURNED ON IN USER CONTROL

Next: &247, ?191, ?193, ?197, ?1235

OPERATION DHW

DHW TEMPERATURE CONTROL SET TO MAX

Next: &940, ?248, ?250, ?252, ?254, ?256

OPERATION CH

CH THERMOSTAT SET TO MAX
USER DISPLAY CONTROL SET TO HW AND CH

Next: &1565, ?349, ?351, ?353, ?357, ?1276

PUMP RUNS DHW DEMAND

ENSURE DHW MODE IS TURNED ON IN USER CONTROL
RUN HOT WATER TAP AT FLOW RATE OF 3 L/MIN

Next: &99, f549

CASE OFF

Next: &475, !f474

TYPE OF DIAGNOSTIC PROCEDURE

Next: &57, !f476

OVER HEAT FURTHER INVESTIGATION

Next: &nff, f1285

FUSE FURTHER INVESTIGATION

Next: &nff, f609

ERROR CODE 160 FAN INVESTIGATION

OUTSIDE MODEL

Next: &nff, f1477

E28 FLUE SENSOR

Next: &nff, f758

E20 FLOW SENSOR

Next: &nff, f740

E40 RETURN SENSOR

Next: &nff, f746

E321 DHW SENSOR

Next: &nff, f752

FAULT CODES

Next: &nff, !f772

E117 AND E118 SYSTEM PRESSURE

Next: &nff, f869

DOES BOILER REACT TO CH DEMAND

USER DISPLAY CONTROL SET TO HW AND CH

Next: &348, f941

E151 AND E385 INVESTIGATION

Next: &nff, f1269

E384 FALSE FLAME

Next: &nff, f1281

OBSERVATION ANTI CYCLE DELAY

ALLOW THE HEATING SY

Next: &1567, !f1568

OBSERVATION PUMP OVER RUN

Next: &nff, !f1569

IMPORTANT INFORMATION FOR RESETTING THE APPLIANCE

Next: &nff, !f1582

VOLTAGE IN

HARNESS INPUT

Next: End

PERMANENT LIVE TO FAN

PCB

Next: End

PUMP DOES NOT RUN

HARNESS - LOW VOLTAGE

Next: End

PUMP DOES NOT RUN 2

HARNESS - LOW VOLTAGE

Next: End

PRESSURE INVESTIGATION

HARNESS - LOW VOLTAGE

Next: End

RETURN SENSOR INVESTIGATION

HARNESS - LOW VOLTAGE

Next: End

PCB BRIDGE

BRIDGE - PCB

Next: End

BLOWN STANDBY MODE AT POWER UP

FUSE 2A 250V C/W HOLDER

Next: End

BLOWN STANDBY MODE

FUSE 2A 250V C/W HOLDER

Next: End

FUSE FURTHER INVESTIGATION

GAS VALVE ASSEMBLY

Next: End

FAN DOES NOT RUN

THERMOSTAT 105 DEG C - LIMIT

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

BURNER IGNITES

ELECTRODE - SENSING - FLAME

Next: End

PERMANENT RECTIFICATION VOLTAGE

PCB

Next: End

SPARK NOT LIGHT

HARNESS - GAS VALVE TO IGNITER

Next: End

HARNESS FLAME RECTIFICATION

CABLE - DETECTION ELECTRODE

Next: End

VOLTAGE TO STEPPER

PCB

Next: End

STEPPER MOTOR

HARNESS - STEPPER MOTOR - GAS VALVE

Next: End

SPARKING NOT LIGHTING

BODY - TRAP - CONDENSATE / PIPEWORK

Next: End

NO PRESSURE DROP

FLUE

Next: End

NO DROP

VENTURI ASSEMBLY

Next: End

NO DROP

BURNER

Next: End

BURNER BAFFLES OUT ONCE ESTABLISHED

BODY - TRAP - CONDENSATE / PIPEWORK

Next: End

DIES AWAY

GAS INLET PRESSURE

Next: End

BURNER BAFFLES OUTONCE ESTABLISHED

HEAT EXCHANGER ASSEMBLY 4E - FLUEWAYS

Next: End

BAFFLES OUT ONCE ESTABLISHED

BURNER

Next: End

BURNER BAFFLESONCE ESTABLISHED

FLUE

Next: End

NO SPARK

PCB

Next: End

NO SPARK

CABLE - IGNITION ELECTRODE

Next: End

NO SPARK

HARNESS - GAS VALVE TO IGNITER

Next: End

PCB LOW VOLTAGE OUTSIDE MODEL

Next: End

UNDER PRESSURE

VESSEL - EXPANSION

Next: End

PASSING CAUSING FALSE FLAME

GAS VALVE ASSEMBLY

Next: End

OVERHEAT FURTHER INVESTIGATION

THERMOSTAT 105 DEG C - LIMIT

Next: End

OVERHEAT FURTHER INVESTIGATION

PUMP C/W O-RING

Next: End

OVERHEAT INVESTIGATION

AIR IN BOILER OR SYSTEM

Next: End

FOR OVERHEAT 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

OVERHEAT NO POWER TO PUMP

PCB

Next: End

PREHEAT SATISFACTORY3

PCB

Next: End

PREHEAT SATISFACTORY3

HARNESS - SUPPLY - 3 WAY VALVE TO PUMP

Next: End

BLR TO TEMP RADS COLD

PCB

Next: End

BLR TO TEMP RADS COLD

HARNESS - SUPPLY - 3 WAY VALVE TO PUMP

Next: End

FROST

Next: End

TAP RUNNING

FLOW THROUGH TURBINE

Next: End

FROST PROTECTION

SENSOR - NTC C/W WASHER

Next: End

FROST PROTECTION

SENSOR - THERMODISC - MINIFIT

Next: End

HARNESS FLAME RECTIFICATION SECOND SECTION

CABLE - FLAME SENSOR TO CONTROL BOX

Next: End

BURNER NOT ESTABLISHING STEPPER MOTOR VOLTAGE

PCB

Next: End

FAN RUNS DHW

SENSOR - THERMODISC - MINIFIT

Next: End

NO POWER TO FAN

SENSOR - THERMODISC - MINIFIT

Next: End

FAN RUNS

SENSOR - NTC - HEAT EXCHANGER

Next: End

FAN RUNS DHW

SENSOR - NTC C/W WASHER

Next: End

RESTRICTED DHW OPERATION

VENTURI ASSEMBLY

Next: End

DHW COOL RADS COLD NO HEAT DEMAND

BODY - TRAP - CONDENSATE / PIPEWORK

Next: End

DHW INCORRECT FAN PRESSURE

CONDENSATE PIPE

Next: End

DHW COOL RADS COLD NO HEAT DEMAND

FAN ASSEMBLY

Next: End

DHW COOL RADS COLD NO HEAT DEMAND

HEAT EXCHANGER ASSEMBLY 4E

Next: End

DHW INCORRECT FAN PRESSURE

BURNER

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

VENTURI ASSEMBLY

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

BODY - TRAP - CONDENSATE / PIPEWORK

Next: End

CH INCORRECT FAN PRESSURE

CONDENSATE PIPE

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

FAN ASSEMBLY

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

HEAT EXCHANGER ASSEMBLY 4E

Next: End

CH INCORRECT FAN PRESSURE

BURNER

Next: End

FAN INVESTIGATION

HARNESS - FAN - PUMP

Next: End

FAN INVESTIGATION

PCB

Next: End

FAN INVESTIGATION 2

PCB

Next: End

FAN INVESTIGATION 3

PCB

Next: End

FAN INVESTIGATION

FAN ASSEMBLY

Next: End

FAN INVESTIGATION 2

FAN ASSEMBLY

Next: End

FAN INVESTIGATION

HARNESS FAN

Next: End

FAN DOES NOT RUN

HARNESS FAN

Next: End

OVERHEATING

Next: End

OVERHEAT INVESTIGATION

SENSOR - THERMODISC - MINIFIT

Next: End

OVERHEAT INVESTIGATION

SENSOR - THERMODISC - MINIFIT

Next: End

OVERHEAT FURTHER INVESTIGATION

Next: End

OVERHEAT

SENSOR - NTC - HEAT EXCHANGER

Next: End

NO ANTI CYCLE DELAY

PCB

Next: End

NO PUMP OVER RUN

PCB

Next: End

GAS VALVE - PCB

GAS VALVE - PCB

Next: End

BLANK FOR RESETS INFORMATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BOILER NOISY

BODY - TRAP - CONDENSATE / PIPEWORK

Next: End

CH BOILER NOISY

CONDENSATE PIPE

Next: End

BOILER NOISY CH OPERATION

SENSOR - THERMODISC - MINIFIT

Next: End

BOILER NOISY ON CH

SENSOR - THERMODISC - MINIFIT

Next: End

KETTLING ON DHW

HEAT EXCHANGER ASSEMBLY 4E

Next: End

ENGINEER CHOICE TO CHANGE

THERMOSTAT 105 DEG C - LIMIT

Next: End

FUSE BLOWING

HARNESS FAN

Next: End

FAN STANDBY

PCB

Next: End

STANDBY

FAN ASSEMBLY

Next: End

SOLENOID FAULT

GAS VALVE ASSEMBLY

Next: End

BURNER DOES NOT IGNITE

ELECTRODE - SPARK

Next: End

BURNER DOES NOT IGNITE

VENTURI ASSEMBLY

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

DHW KETTLING

PUMP C/W O-RING

Next: End

DHW NOISY KETTLING

BODY - TRAP - CONDENSATE / PIPEWORK

Next: End

DHW NOISY KETTLING

PCB

Next: End

DHW NOISY KETTLING

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW DHW

GAS INLET PRESSURE

Next: End

DHW COOL

PUMP C/W O-RING

Next: End

CH OPERATION FAILURE TO REFIRE

Next: End

ANTI CYCLE DELAY

PCB

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

GAS INLET PRESSURE

Next: End

BLR TO TEMP RADS NOT

FLOW ASSEMBLY BRASS W/O BYPASS

Next: End

BOILER TO TEMP RADS COOL

PUMP C/W O-RING

Next: End

CH OPERATION

Next: End

BOILER NOISY

PUMP C/W O-RING

Next: End

CH OPERATION NOISY

Next: End

CASE REMOVAL

Z DIRECTION CHOICE OR CONTINUE

Next: End

FOR TYPE DIAG PROCEDURE

Z DIRECTION CHOICE OR CONTINUE

Next: End

LOW PRESSURE WARNING

SYSTEM CHECKS

Next: End

LOW PRESSURE SWITCH

PCB

Next: End

NO VOLTAGE TO FLOW TURBINE

PCB

Next: End

STOPS PUMP RUNNING

SENSOR - THERMODISC - MINIFIT

Next: End

STOPS PUMP

SENSOR - THERMODISC - MINIFIT

Next: End

STOPS PUMP

SENSOR - NTC - HEAT EXCHANGER

Next: End

STOPS PUMP RUNNING

SENSOR - NTC C/W WASHER

Next: End

FURTHER INVESTIGATION FUSE F1

PUMP C/W O-RING

Next: End

BLOWN STAND BY MODE AT POWER UP

MAIN FUSE FUSED SPUR F1

Next: End

CALIBBRATION

SENSOR - THERMODISC - MINIFIT

Next: End

FAN RUNS

SENSOR - NTC C/W WASHER

Next: End

OUTSIDE MODEL

SENSOR - NTC - HEAT EXCHANGER

Next: End

FAULT CODES

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW TOO HOT

SENSOR - NTC C/W WASHER

Next: End

FAN RUNS

SENSOR - THERMODISC - MINIFIT

Next: End

DHW TOO HOT

SENSOR - THERMODISC - MINIFIT

Next: End

DHW COOL RADS COLD

SENSOR - NTC C/W WASHER

Next: End

DHW COOL

SENSOR - THERMODISC - MINIFIT

Next: End

DHW COOL

SENSOR - THERMODISC - MINIFIT

Next: End

DHW RUNS HOT THEN COLD

PUMP C/W O-RING

Next: End

DHE RUNS HOT THEN COLD

SENSOR - THERMODISC - MINIFIT

Next: End

DHW RUNS HOT THEN COLD

SENSOR - NTC C/W WASHER

Next: End

DHW RUNS HOT THEN COLD

SENSOR - THERMODISC - MINIFIT

Next: End

BLR TEMP LOW SYSTEM LOW

SENSOR - THERMODISC - MINIFIT

Next: End

BLR TEMP LOW SYSTEM LOW

SENSOR - THERMODISC - MINIFIT

Next: End

POOR FLOW RATE

VALVE - COMPACT - RETURN - DHW

Next: End

OUTSIDE MODEL SYSTEM PRESSURE INVESTIGATION

PCB

Next: End

FAULT CODE

SYSTEM CHECKS

Next: End

DC HARNESS

FAN ASSEMBLY

Next: End

FUSE BLOWING

MOTOR - 3 WAY VALVE

Next: End

STANDBY

HARNESS - FAN - PUMP

Next: End

FLOW SWITCH ASSEMBLY

FLOW ASSEMBLY

Next: End

DHW NOISY KETTLINGNO REACTION CH

PCB

Next: End

DHW NOISY KETTLINGNO REACTION CH

Next: End

DHW COOL

HEAT EXCHANGER ASSEMBLY 4E

Next: End

DHW HOT THEN COLD

HEAT EXCHANGER ASSEMBLY 4E

Next: End

SERVICE VALVES FLOW AND RETURN

SERVICE VALVES FLOW AND RETURN

Next: End

TOO COOL BEFORE RE FIRE

Next: End

BURNER IGNITION

FAN ASSEMBLY

Next: End

FUSE FURTHER INVESTIGATION

HARNESS - SUPPLY - 3 WAY VALVE TO PUMP

Next: End

PUMP DOES NOT RUN

HARNESS - SUPPLY - 3 WAY VALVE TO PUMP

Next: End

FUSE FURTHER INVESTIGATION 2

HARNESS - SUPPLY - 3 WAY VALVE TO PUMP

Next: End

SENSOR INVESTIGATION

HARNESS - NTC / EXTERNAL SENSOR

Next: End

FLOW SENSOR INVESTIGATION

HARNESS - LOW VOLTAGE

Next: End

PCB DISPLAY

KNOB - HMI TEXT

Next: End

FURTHER IN VESTIGATION F2

Z DIRECTION CHOICE OR CONTINUE

Next: End

FUSE

PCB

Next: End

FURTHER IN VESTIGATION F3

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAN DOES NOT RUN

HARNESS - LIMIT THERMOSTAT

Next: End

SPARK BUT DOES NOT LIGHT

GAS VALVE ASSEMBLY

Next: End

MECHANICAL FAULT

GAS VALVE ASSEMBLY

Next: End

NO DROP

HEAT EXCHANGER ASSEMBLY 4E - FLUEWAYS

Next: End

BAFFLES OUT

GAS VALVE ASSEMBLY

Next: End

SPARK GENERATOR

IGNITER ASSEMBLY

Next: End

NO SPARK GENERATOR OK

ELECTRODE - SPARK

Next: End

E151 AND E385

PCB

Next: End

EXPANSION CONNECTION

PIPE - VESSEL - EXPANSION

Next: End

FALSE FLAME

PCB

Next: End

OVERHEAT WILL NOT RESET

PCB

Next: End

OVERHEAT FURTHER INVESTIGATION

HARNESS - LIMIT THERMOSTAT

Next: End

OVERHEAT

PUMP C/W O-RING

Next: End

OVERHEAT

HARNESS - SUPPLY - 3 WAY VALVE TO PUMP

Next: End

DHW COOL RADS HOT

MOTOR - 3 WAY VALVE

Next: End

BOILER UP TO TEMP RADS COLD

MOTOR - 3 WAY VALVE

Next: End

HW+CHFROST STANDBY MODE

PCB

Next: End

VOTAGE CHANGE

PCB

Next: End

STEPPER MOTOR

GAS VALVE ASSEMBLY

Next: End

PCB FUSE BLOWING

PCB FUSE BLOWING

Next: End

SENSOR PRIMARY FAN RUNS

HARNESS - LOW VOLTAGE

Next: End

SENSOR TEMP RETURN FAN RUNS

HARNESS - LOW VOLTAGE

Next: End

FLUE SENSOR FAN RUNS

HARNESS - LOW VOLTAGE

Next: End

FAN DOES NOT RUN DHW

PCB

Next: End

FAN RUNS

HARNESS - NTC / EXTERNAL SENSOR

Next: End

DHW COOL RADS COLD NO HEAT DEMAND

FLUE

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

FLUE

Next: End

FAN INVESTIGATION 4

PCB

Next: End

OVERHEATING

HEAT EXCHANGER - PLATE TO PLATE - 14 PLATES

Next: End

OVERHEAT INVESTIGATION

HARNESS - LOW VOLTAGE

Next: End

OVERHEAT INVESTIGATION2

HARNESS - LOW VOLTAGE

Next: End

FLUE SENSOR OVERHEAT

HARNESS - LOW VOLTAGE

Next: End

OVERHEATING

HEAT EXCHANGER ASSEMBLY 4E

Next: End

LETBY PREHEAT3

FLOW ASSEMBLY BRASS W/O BYPASS

Next: End

SPARKING BUT DOES NOT LIGHT

PCB

Next: End

OVERHEAT FURTHER INVESTIGATION 2

PCB

Next: End

CH OPERATION NOISY

HEAT EXCHANGER ASSEMBLY 4E

Next: End

CH OPERATION NOISEY

Next: End

KETTLING

HEAT EXCHANGER - PLATE TO PLATE - 14 PLATES

Next: End

BLANKS FOR OVERHEAT SECTION

Z DIRECTION CHOICE OR CONTINUE

Next: End

FUSE BLOWING

FAN ASSEMBLY

Next: End

OVERHEAT FURTHER INVESTIGATION

PCB

Next: End

FAN STANDBY 2

PCB

Next: End

BURNER DOES NOT IGNITE

BURNER

Next: End

DHW NOISY KETTLING

HEAT EXCHANGER - PLATE TO PLATE - 14 PLATES

Next: End

DHW NOISY KETTLING

HEAT EXCHANGER ASSEMBLY 4E

Next: End

NO REACTION TO CH DEMAND DHW KETTLING

HARNESS INPUT

Next: End

DHW TOO COOL

PCB

Next: End

WATER TOO HOT

PCB

Next: End

BLR LOW SYSTEM LOW

PCB

Next: End

POWER TO PUMP

PUMP C/W O-RING

Next: End

STANDBY MODE

VALVE - SENSOR - PRESSURE

Next: End

STOPS PUMP SENSOR PRIMARY FAN RUNS

HARNESS - LOW VOLTAGE

Next: End

STOPS PUMP SENSOR TEMP RETURN FAN RUNS

HARNESS - LOW VOLTAGE

Next: End

STOPS PUMP FLUE SENSOR FAN RUNS

HARNESS - LOW VOLTAGE

Next: End

STOPS PUMPFAN RUNS

HARNESS - NTC / EXTERNAL SENSOR

Next: End

PUMP DOES NOT RUN ALL OTHER TESTS OK

PCB

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION FUSE F1 MAIN SOLENOID

HARNESS - GAS VALVE TO IGNITER

Next: End

FURTHER INVESTIGATION F1

Z DIRECTION CHOICE OR CONTINUE

Next: End

FROST PROTECTION

FROST PROTECTION

Next: End

FLOW SENSOR OUTSIDE MODEL

PCB

Next: End

RETURN SENSOR OUTSIDE MODEL

PCB

Next: End

OUTSIDE MODEL

SENSOR - THERMODISC - MINIFIT

Next: End

DHW SENSOR OUTSIDE MODEL

PCB

Next: End

STOPS PUMP FLUE SENSOR FAN RUNS OUTSIDE MODEL

HARNESS - LOW VOLTAGE

Next: End

FLUE SENSOR OUTSIDE MODEL

PCB

Next: End

GAS RATE

GAS VALVE ASSEMBLY

Next: End

PUMP RUNS

DHW INLET FILTER

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

GAS VALVE ASSEMBLY

Next: End

PRESSURE FAULT CODE

PCB

Next: End

PUMP RUNS

DHW FLOW FLOAT

Next: End

STANDBY MODESYSTEM PRESSURE

VALVE - SENSOR - PRESSURE

Next: End

FUSE INVESTIGATION

HARNESS - FAN - PUMP

Next: End

POOR FLOW RATE

HEAT EXCHANGER - PLATE TO PLATE - 14 PLATES

Next: End

VOLTAGE IN

PCB

Next: End

PUMP RUNS?FAN DOES NOT RUN

SENSOR - HALL

Next: End

NO REACTION TO CH DEMAND

HARNESS INPUT

Next: End

DHW COOL

HEAT EXCHANGER - PLATE TO PLATE - 14 PLATES

Next: End

DHW RUN HOT THEN COLD

PCB

Next: End

OPERATION DHW DHW RUNS HOT THEN COLD

HEAT EXCHANGER - PLATE TO PLATE - 14 PLATES

Next: End

CH OPERATION BOILER UP TO TEMP RADS COLD

Next: End

VOLTAGE IN 2

PCB

Next: End

BURNER ESTABLISHES THEN BAFFLES AFTER MORE THAN 5 SECONDS

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p1237

SYSTEM PRESSURE RISE EXCESSIVE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1277

TEMP DIFF CORRECT LOCAL BOILING

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

Next: !p1602

DIFFERENTIAL OK

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

Next: !p1604

FAN RUNS CONTINUALLY

CHARACTERISTIC TEST FROM BOILER ENTERS STANDBY MODE

Next: p180

NO SPARK

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p1250

BURNER IGNITES BUT DOES NOT ESTABLISH WITHIN 5 SECONDS

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p1130

SPARKING OCCURS BUT BURNER DOES NOT LIGHT

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p198

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p249

DHW TOO COOL RADIATORS REMAIN COLD {NO HEATING DEMAND}

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p251

DHW TOO COOL RADIATORS START TO HEAT WITH NO HEATING DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p253

DHW NOISY KETTLING

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p255

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p787

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION (FOR HEAT EX DIAG)

Next: p283

BOILER KETTLES

CHARACTERISTIC TEST FROM CH OPERATION (FOR HEAT EX DIAG)

Next: p285

BOILER NOISY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p350

BOILER UP TO TEMPERATURE BUT RADIATORS COLD

CHARACTERISTIC TEST FROM OPERATION CH

Next: p352

BOILER TEMP LOW SYSTEM TEMP LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p354

OPERATES CORRECTLY BUT SYSTEM GETS TOO COOL BEFORE REFIRING

CHARACTERISTIC TEST FROM OPERATION CH

Next: p358

BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM BOILER ENTERS STANDBY MODE

Next: p651

FLOAT DAMAGED,RESTRICTED OR JAMMED

CHARACTERISTIC TEST FROM FLOW SWITCH ASSEMBLY

Next: !p88

FLOW SWITCH ASSEMBLY CLEAR

CHARACTERISTIC TEST FROM FLOW SWITCH ASSEMBLY

Next: !p90

03/08/2018 15:32:57 1807_1_50_1 16/08/2018 11:29:47

06/08/2018 10:31:19

Next: End

VOLTAGE PERMANENT TO FAN

Next: p1501, !f102

RESISTANCE BRIDGE PCB AND HARNESS

REMOVE DISPLAY PCB FROM FRONT OF BOILER
REMOVE CONNECTOR X40 FROM PCB

Next: p1065, !f1066

FUSE FURTHER INVESTIGATION F2

Next: !p1069, !f1070

FUSE FURTHER INVESTIGATION F3

Next: !p1073, !f1074

RESISTANCE CHECK OVERHEAT STAT AND HARNESS

DISCONNECT CONNECTOR X14 FROM THE PCB

Next: p1401, f1127

RESISTANCE SENSOR OVERHEAT STAT

DISCONNECT THE LEADS FROM THE OVERHEAT STAT

Next: !p1129, !f1128

ELECTRODE SENSE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p1209, !f1163

RESISTANCE GAS VALVE HARNESS

DISCONNECT THE 4 WAY CONNECTOR (X15) FROM THE PCB
ALSO DISCONNECT THE LEAD FROM THE GAS VALVE

Next: p1575, !f1192

RESISTANCE STEPPER MOTOR HARNESS

DISCONNECT CONNECTOR X25 FROM THE PCB
DISCONNECT THE STEPPER MOTOR LEAD FROM THE GAS VALVE

Next: !p1222, !f1223

INSPECTION CONDENSATE TRAP

Next: p1227, !f1228

VOLTAGE TO SPARK GENERATOR

Next: p1259, !f1260

VOLTAGE MAINS POWER INPUT TO APPLIANCE

REMOVE CONTROL BOX COVER

Next: !p1271, !f1270

PRESSURE INLET CUTOUT

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: !p1282, !f1284

OBSERVATION RESET BOILER

ALLOW THE APPLIANCE TO COOL

Next: p1287, f1286

RESISTANCE CHECK OVERHEAT STAT AND HARNESS

DISCONNECT CONNECTOR X14 FROM THE PCB

Next: !p1291, f1289

RESISTANCE SENSOR OVERHEAT STAT

DISCONNECT THE LEADS FROM THE OVERHEAT STAT

Next: !p1292, !f1293

VOLTAGE PUMP AT PUMP

DISCONNECT THE DC CO

Next: !p1337, f1338

VOLTAGE PUMP AT PCB

RUN HOT WATER TAP AT FLOW RATE OF 3 L/MIN

Next: !p1339, !f1340

VOLTAGE DIVERTER VALVE PCB (DHW)

Next: p1346, !f1345

VOLTAGE DIVERTER VALVE PCB CH

USER DISPLAY CONTROL SET TO HW AND CH

Next: p1352, !f1351

RESISTANCE SENSOR TEMP PRIMARY

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: !p1404, !f1405

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: !p1408, !f1409

RESISTANCE HEAT EX OVERHEAT SENSOR

DISCONNECT THE WIRING FROM THE FLUE OVERHEAT STAT.

Next: !p1412, !f1413

RESISTANCE SENSOR TEMP DHW

REMOVE THE GREEN LEADS FROM DHW SENSOR

Next: !p1416, !f1417

INSPECTION AIR INTAKE

Next: p1419, !f1420

INSPECTION AIR INTAKE

Next: p1449, !f1450

RESISTANCE FAN HARNESS

DISCONNECT THE 4 WAY CONNECTOR FROM THE PCB AND FAN

Next: p1478, !f1479

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE P

Next: !p1541, f1542

INSPECTION EXTERNAL BYPASS SYSTEM

Next: !p1572, !f1543

RESISTANCE SENSOR TEMP PRIMARY

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: !p1548, !f1549

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: !p1552, !f1553

RESISTANCE HEAT EX OVERHEAT SENSOR

DISCONNECT THE WIRING FROM THE FLUE OVERHEAT STAT.

Next: !p1559, !f1561

OBSERVATION ADJUST BYPASS AND RE FIRE

Next: !p1606, !f1607

OVERHEAT STAT OR FURTHER INVESTIGATION

TESTS SO FAR IND

Next: !p1610, !f1609

RESISTANCE AC FAN HARNESS

REMOVE CONNECTOR X11 FROM THE PCB
REMOVE THE 3 WAY CONNECTOR FROM THE FAN

Next: !p1619, !f1618

VOLTAGES DC TO GAS VALVE

Next: p201, f1191

VOLTAGE EXTERNAL CONTROLS (IN)

USER DISPLAY CONTROL TO HW AND CH

Next: !p927, !f293

VOLTAGE PUMP AT PUMP

DISCONNECT THE DC CO

Next: !p550, f551

VOLTAGE PUMP AT PCB

RUN HOT WATER TAP AT FLOW RATE OF 3 L/MIN

Next: !p1050, f554

SYSTEM PRESSURE CORRECT

Next: p555, !f556

VOLTAGE TO LOW PRESSURE SWITCH

REMOVE CONTROL BOX COVER IF NECESSARY

Next: p559, !f560

VOLTAGE TO FLOW SENSOR

REMOVE CONTROL BOX COVER IF NECESSARY

Next: p565, !f566

RESISTANCE SENSOR TEMP PRIMARY

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: !p571, !f572

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: !p575, !f576

RESISTANCE HEAT EX OVERHEAT SENSOR

DISCONNECT THE WIRING FROM THE FLUE OVERHEAT STAT.

Next: !p579, !f580

VOLTAGE MAINS POWER INPUT TO APPLIANCE

REMOVE CONTROL BOX COVER

Next: p1062, f60

RESISTANCE SENSOR TEMP DHW

REMOVE THE GREEN LEADS FROM DHW SENSOR

Next: !p583, !f584

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM HOLDER

Next: !p61, f62

RESISTANCE GAS VALVE AND SOLENOID MAIN AND HARNESS_FUSE

DISCONNECT CONNECTOR MARKED X36

Next: p611, f612

RESISTANCE GAS VALVE SOLENOID MAIN_FUSE

DISCONNECT THE LEAD FROM THE GAS VALVE

Next: !p613, !f1100

RESISTANCE PUMP_FUSE

DISCONNECT THE MAINS CABLE TO THE PUMP

Next: !p1053, !f618

FUSE FURTHER INVESTIGATION F1

Next: !p63, !f64

VOLTAGE EXTERNAL CONTROLS CALLING

ENSURE THERE ARE NO DEMANDS FROM EXTERNAL CONTROLS

Next: p1355, !f1356

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: !p741, f742

RESISTANCE SENSOR TEMP PRIMARY

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: !p1055, !f744

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: !p747, f748

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: !p749, !f1056

RESISTANCE SENSOR TEMP DHW AND HARNESS

DISCONNECT CONNECTOR FROM X21 ON THE PCB

Next: !p753, f754

RESISTANCE SENSOR TEMP DHW

REMOVE THE GREEN LEADS FROM DHW SENSOR

Next: !p1054, !f756

RESISTANCE HEAT EX OVERHEAT AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: !p765, f762

RESISTANCE HEAT EX OVERHEAT SENSOR

DISCONNECT THE WIRING FROM THE FLUE OVERHEAT STAT.

Next: !p763, !f764

INSPECTION SERVICE VALVE DHW

Next: p81, !f82

PRESSURE FAN

ATTACH U GAUGE TO GAS VALVE OUTLET TEST POINT
REMOVE 4 WIRE HARNESS FROM FAN

Next: !p821, f1418

PRESSURE FAN

ATTACH U GAUGE TO GAS VALVE OUTLET TEST POINT
REMOVE 4 WIRE HARNESS FROM FAN

Next: !p836, f1448

SYSTEM PRESSURE CORRECT

Next: p878, !f885

VOLTAGE TO LOW PRESSURE SWITCH

REMOVE CONTROL BOX COVER IF NECESSARY

Next: p881, !f882

RESISTANCE FAN (DC)_FUSE

REMOVE THE 4 WIRE CONNECTOR FROM THE FAN

Next: !p899, !f892

RESISTANCE DIVERTER VALVE HEAD

REMOVE DIVERTER VALVE HEAD FROM BODY

Next: !p1049, !f896

VOLTAGE EXTERNAL CONTROLS (OUT PCB)

REMOVE CONTROLS COVER AS NECESSARY
USER DISPLAY CONTROL TO CH AND HW

Next: p942, !f943

VOLTAGE EXTERNAL CONTROLS (IN)

USER DISPLAY CONTROL TO HW AND CH

Next: p998, !f947

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EX_CH

USER DISPLAY CONTROL SET TO HW AND CH
ATTACH TEMPERATURE PROBES AS INDICATED BY RED ARROWS

Next: !p982, !f983

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EX_CH

USER DISPLAY CONTROL SET TO HW AND CH
ATTACH TEMPERATURE PROBES AS INDICATED BY RED ARROWS

Next: !p986, !f989

VOLTAGE FAN

Next: !p103, f1101

VOLTAGE TO DISPLAY PCB

REMOVE THE I-CONTROLLER (DISPLAY PCB) FROM THE FRONT OF THE BOILER

Next: !p1063, f1064

RESISTANCE FUSE F2 ( APPLIANCE)

REMOVE FUSE FROM HOLDER AND CONNECTOR BLOCK

Next: p1067, f1068

RESISTANCE FUSE F3 ( APPLIANCE)

REMOVE FUSE FROM HOLDER AND THE CONNECTOR BLOCK.

Next: !p1071, f1072

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1158, !f1131

VOLTAGE PERMANENT RECTIFICATION

NO DEMANDS
ENSURE BOILER IS NOT IN LOCKOUT CONDITION

Next: p1159, !f1177

VOLTAGE CHANGE RECTIFICATION

Next: p1367, f1161

RESISTANCE CHECK RECTIFICATION LEAD

DISCONNECT THE RECTIFICATION LEAD FROM THE PCB
DISCONNECT THE RECTIFICATION LEAD FROM THE PROBE

Next: p1364, !f1210

VOLTAGE TO STEPPER MOTOR AT PCB

REMOVE CONNECTOR X25 FROM THE PCB AND MAKE SAFE

Next: p1220, !f1219

RESISTANCE STEPPER MOTOR AND HARNESS

REMOVE CONNECTOR X25 FROM THE PCB

Next: p1224, f1221

PRESSURE FAN

ATTACH U GAUGE TO GAS VALVE OUTLET TEST POINT
REMOVE 4 WIRE HARNESS FROM FAN

Next: !p1225, f1226

INSPECTION FLUE

Next: p1229, !f1230

INSPECTION AIR INTAKE

Next: p1231, !f1232

INSPECTION BURNER

REMOVE THE FRONT OF THE COMBUSTION CHAMBER

Next: !p1233, !f1234

INSPECTION CONDENSATE TRAP

Next: p1238, !f1239

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1240, !f1241

HEAT EXCHANGER FLUE WAYS

REMOVE THE COMBUSTION CHAMBER FRONT

Next: p1242, !f1243

INSPECTION BURNER

REMOVE THE FRONT OF THE COMBUSTION CHAMBER

Next: p1244, !f1245

INSPECTION FLUE

Next: !p1246, !f1247

OBSERVATION SPARKING

REMOVE THE SPARK ELECTRODE CAP
WEDGE THE CAP BEHIND THE BRACKET FOR THE SPARK GENERATOR

Next: !p1265, f1258

RESISTANCE CHECK IGNITION LEAD

REMOVE THE SPARK LEAD FROM THE ELECTRODE
REMOVE THE SPARK LEAD FROM THE GENERATOR

Next: p1261, !f1262

RESISTANCE SPARK GENERATOR LEAD

REMOVE CONNECTOR X15 FROM THE PCB
REMOVE THE POWER CABLE FROM THE SPARK GENERATOR

Next: !p1263, !f1266

EXPANSION VESSEL PRESSURE

SYSTEM DISCHARGED

Next: !p1278, !f1279

OBSERVATION DOES A FAULT CODE RE APPEAR

DHW SET TO MAX

Next: p1314, f1608

PUMP RUNS DHW DEMAND

ENSURE DHW MODE IS TURNED ON IN USER CONTROL
RUN HOT WATER TAP AT FLOW RATE OF 3 L/MIN

Next: p1295, f1336

PUMP LIMPET TEST

Next: p1296, !f1297

INSPECTION AIR IN SYSTEM AND BOILER

ENSURE BOILER SYSTEM PRESSURE IS CORRECT
ENSURE AUTO AIR VENT CAP IS OPEN

Next: p1526, !f1299

RESISTANCE OVERHEAT STAT AT TEMP

RUN THE APPLIANCE UNTIL THE BURNER SHUTS DOWN

Next: p1294, !f1335

RESISTANCE CHECK DIVERTER VALVE HARNESS

REMOVE CONNECTOR X13 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE HEAD

Next: !p1347, !f1348

RESISTANCE CHECK DIVERTER VALVE HARNESS

REMOVE CONNECTOR X13 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE HEAD

Next: !p1353, !f1354

VOLTAGE NO DEMAND FROM FLOW SWITCH TURBINE

REMOVE CONTROL BOX COVER
NO DEMANDS

Next: p1359, !f1358

RESISTANCE SENSOR TEMP DHW

REMOVE THE GREEN LEADS FROM DHW SENSOR

Next: p1360, !f1361

RESISTANCE SENSOR TEMP PRIMARY

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: !p1362, !f1363

RESISTANCE CHECK RECTIFICATION LEAD SECOND SECTION

DISCONNECT THE RECTI

Next: !p1365, !f1366

VOLTAGE TO STEPPER MOTOR NOT ESTABLISHING

SET MULTIMETER TO RANGE MODE
(CLICK ON MULTIMETER SYMBOL FOR GUIDANCE)

Next: !p1368, !f1369

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p1402, f1403

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p1406, f1407

RESISTANCE HEAT EX OVERHEAT AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p1410, f1411

RESISTANCE SENSOR TEMP DHW AND HARNESS

DISCONNECT CONNECTOR FROM X21 ON THE PCB

Next: !p1414, f1415

INSPECTION CONDENSATE TRAP

Next: p1421, !f1422

INSPECTION CONDENSATE PIPE

Next: p1423, !f1424

INSPECTION FAN

REMOVE FAN

Next: p1425, !f1426

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

Next: p1430, !f1428

INSPECTION BURNER

REMOVE THE FRONT OF THE COMBUSTION CHAMBER

Next: !p1432, !f1431

INSPECTION CONDENSATE TRAP

Next: p1451, !f1452

INSPECTION CONDENSATE PIPE

Next: p1453, !f1454

INSPECTION FAN

REMOVE FAN

Next: p1455, !f1456

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

Next: p1460, !f1458

INSPECTION BURNER

REMOVE THE FRONT OF THE COMBUSTION CHAMBER

Next: !p1462, !f1461

VOLTAGE PERMANENT TO FAN

Next: p1490, !f1481

VOLTAGE DC TO FAN

Next: p1482, !f1483

VOLTAGE FAN

Next: p1485, !f1484

FAN RUNNING

Next: p1486, !f1487

VOLTAGES DC FROM FAN

Next: !p1488, !f1489

RESISTANCE AC FAN HARNESS

REMOVE CONNECTOR X11 FROM THE PCB
REMOVE THE 3 WAY CONNECTOR FROM THE FAN

Next: p1480, !f1500

RESISTANCE AC FAN HARNESS

REMOVE CONNECTOR X11 FROM THE PCB
REMOVE THE 3 WAY CONNECTOR FROM THE FAN

Next: p101, !f1525

DIFFERENTIAL PLATE HEAT EX

ATTACH TEMPERATURE P

Next: p1545, f1538

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p1546, f1547

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p1554, f1551

RESISTANCE HEAT EX OVERHEAT AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p1556, f1558

INSPECTION EXTERNAL BYPASS SYSTEM

Next: !p1620, !f1557

RESISTANCE GAS VALVE SOLENOID AND TO EARTH

DISCONNECT THE LEAD FROM THE GAS VALVE

Next: !p1579, !f1580

INSPECTION CONDENSATE TRAP

Next: p1585, !f1586

INSPECTION CONDENSATE PIPE

Next: p1595, !f1588

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: p1596, !f1597

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: p1599, !f1598

TEMPERATURE DIFFERENTIAL FLOW RETURN FROM BOILER

ALLOW FAN TO RUN AND

Next: !p1600, ?1601, ?1603

RESISTANCE AC FAN_FUSE

DISCONNECT CONNECTOR X11 FROM THE PCB

Next: p889, f1617

RESISTANCE FAN HARNESS

DISCONNECT THE 4 WAY CONNECTOR FROM THE PCB AND FAN

Next: p181, !f897

VOLTAGE DC TO FAN

Next: p187, !f186

VOLTAGES DC FROM FAN

Next: !p188, !f189

INLET PRESSURE DROP

ATTACH PRESSURE GAU

Next: p199, f200

ELECTRODES SPARK

Next: p213, !f214

RESISTANCE GAS VALVE

DISCONNECT THE LEAD FROM THE GAS VALVE

Next: p1218, !f204

FAN ASSEMBLY AIR INTAKE

Next: p215, !f216

INSPECTION FLUE

Next: !p217, !f218

RESISTANCE SENSOR TEMP DHW

REMOVE THE GREEN LEADS FROM DHW SENSOR

Next: p336, !f778

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p304, !f305

INSPECTION DIVERTER VALVE DHW POSITION

REMOVE DIVERTER VALVE MOTOR FROM THE BODY

Next: !p1574, f1343

PUMP LIMPET TEST

Next: p276, !f277

INSPECTION CONDENSATE TRAP

Next: p278, !f279

CH OPERATION 1

FLOW AND RETURN VALV

Next: !p280, ?282, ?284

VOLTAGE EXTERNAL CONTROLS (OUT PCB)

REMOVE CONTROLS COVER AS NECESSARY
USER DISPLAY CONTROL TO CH AND HW

Next: p288, !f289

INSPECTION EXTERNAL BYPASS SYSTEM

Next: !p286, f1605

VOLTAGE EXTERNAL CONTROLS (OUT)

REMOVE CONTROLS COVER AS NECESSARY
USER DISPLAY CONTROL SET TO HW AND CH

Next: !p290, f291

RESISTANCE SENSOR TEMP DHW

REMOVE THE GREEN LEADS FROM DHW SENSOR

Next: p306, !f784

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: p310, !f785

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: p314, !f786

PUMP LIMPET TEST

Next: p318, !f319

GAS RATE

Next: p320, f820

DIFFERENTIAL PLATE HEAT EX

ATTACH TEMPERATURE P

Next: !p334, f981

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: p340, !f779

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: !p344, !f780

PUMP LIMPET TEST

Next: p407, !f408

INSPECTION DIVERTER VALVE CH POSITION

REMOVE DIVERTER VALVE MOTOR FROM DIVERTER BODY

Next: p395, f1349

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p371, !f372

VOLTAGE BOILER SWITCHED LIVE OPERATION REFIRE

ENSURE EXTERNAL TIMER AND ROOM STAT ARE CALLING (IF FITTED)
USER DISPLAY CONTROL SET TO HW AND CH

Next: p363, !f364

OBSERVATION ANTI CYCLE DELAY

ALLOW THE HEATING SY

Next: !p1018, !f366

GAS RATE

Next: p373, f835

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: p387, !f816

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: !p391, !f817

INSPECTION DIVERTER SPINDLE CH

REMOVE THE DIVERTER VALVE ACTUATOR FROM THE DIVERTER VALVE BODY

Next: p401, !f402

PUMP LIMPET TEST

Next: p403, !f404

INSPECTION EXTERNAL BYPASS SYSTEM

Next: p990, !f406

INSPECTION EXTERNAL BYPASS SYSTEM

Next: p1584, !f410

VOLTAGE LOW PRESSURE SWITCH

ENSURE SYSTEM PRESSURE IS SET BETWEEN 0.6 AND 1.5BAR

Next: p557, f558

VOLTAGE DEMAND FROM FLOW SENSOR

REMOVE CONTROL BOX COVER IF NECESSARY
RUN HOT WATER TAP AT FLOW RATE OF 3 L/MIN

Next: p563, f564

RESISTANCE LOW PRESSURE SWITCH HARNESS

REMOVE THE CONNECTOR X22 FROM THE PCB
DISCONNECT THE LOW PRESSURE SWITCH CONNECTOR

Next: !p561, !f1051

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p569, f570

RESISTANCE HARNESS FLOW SENSOR

DISCONNECT TERMINAL X22 FROM THE PCB
DISCONNECT THE LEAD FROM THE HALL SENSOR

Next: p929, !f1048

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p573, f574

RESISTANCE HEAT EX OVERHEAT AND HARNESS

DISCONNECT CONNECTOR FROM X22 ON THE PCB

Next: p577, f578

RESISTANCE SENSOR TEMP DHW AND HARNESS

DISCONNECT CONNECTOR FROM X21 ON THE PCB

Next: !p586, f582

RESISTANCE PUMP AND HARNESS_FUSE

REMOVE CONNECTOR X13 FROM THE PCB

Next: p888, f616

IS BOILER TEMP LOW

Next: !p673, f718

RESISTANCE SENSOR TEMP DHW

REMOVE THE GREEN LEADS FROM DHW SENSOR

Next: p788, !f808

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RED LEADS) FROM FLOW SENSOR

Next: p792, !f807

RESISTANCE SENSOR TEMP RETURN

REMOVE THE TWO LEADS (BLUE) FROM THE RETURN SENSOR

Next: p796, !f809

PUMP LIMPET TEST

Next: p800, !f801

DIFFERENTIAL PLATE HEAT EX

ATTACH TEMPERATURE P

Next: !p984, f985

FLOW SWITCH ASSEMBLY

DHW DISCHARGED AND D

Next: !p83, ?87, ?89

VOLTAGE LOW PRESSURE SWITCH

ENSURE SYSTEM PRESSURE IS SET BETWEEN 0.6 AND 1.5BAR

Next: !p879, f880

RESISTANCE LOW PRESSURE SWITCH HARNESS

REMOVE THE CONNECTOR X22 FROM THE PCB
DISCONNECT THE LOW PRESSURE SWITCH CONNECTOR

Next: !p883, !f1052

RESISTANCE FAN AND HARNESS(DC)_FUSE

DISCONNECT CONNECTOR X23 FROM THE PCB

Next: p1611, f890

RESISTANCE DIVERTER VALVE AND HARNESS_FUSE

REMOVE CONNECTOR X13 FROM THE PCB
REMOVE DIVERTER VALVE HEAD FROM BODY

Next: !p1400, f894

INSPECTION FLOW ASSEMBLY

ISOLATE MAINS WATER
DRAIN DOMESTIC WATER CIRCUITS

Next: !p930, !f931

VOLTAGE EXTERNAL CONTROLS (OUT)

REMOVE CONTROLS COVER AS NECESSARY
USER DISPLAY CONTROL SET TO HW AND CH

Next: !p944, f945

INSPECTION FLOW AND RETURN VALVES

Next: !p992, !f991

VOLTAGE EXTERNAL CONTROLS IN PCB

REMOVE CONTROLS COVER AS NECESSARY
USER DISPLAY CONTROL SET TO HW AND CH

Next: !p999, !f1000

System Information

Total Tests: 492

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control