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:

APPLIANCE APPEARS SATISFACTORY.

Next: nff

DHW FLOW RATE

Next: &803, f1424

DHW FAN RUNS

SELECTOR SWITCH TO D

Next: &1924, f1794

DHW OPERATION

SELECTOR SWITCH TO D

Next: &10, ?137, ?139, ?141, ?2335

DHW MODULATION

SET FLOW RATE AT TAP

Next: &12, f906

CH OPERATION

SELECTOR SWITCH TO D

Next: &13, ?163, ?165, ?167, ?2433

SYSTEM PRESSURE RISE

SELECTOR SWITCH TO D

Next: &14, !f193

CH MODULATION

ATTACH A U-GAUGE TO

Next: &nff, f909

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &3, !f609

OBSERVATION MAINS LED ILLUMINATED

ENSURE THE SELECTOR SWITCH IS IN HEATING AND HOT WATER MODE

Next: &818, ?804, ?806

DHW PUMP RUNS

SELECTOR SWITCH TO DHW & CH POSITION
DHW TEMPERATURE SELECTOR TO MAXIMUM
ENSURE NO DEMANDS

Next: &5, ?821, ?823

OVERHEAT FAULT

OUTSIDE MODEL

Next: &nff, f2121

HEADER FOR FUSE INVESTIGATION

INTENTIONALLY BLANK, HEADER FOR FUSE INVESTIGATION

Next: &nff, f1499

PRESSURE BURNER MAXIMUM

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: &2001, ?1912, ?1914

OBSERVATION BURNER IGNITES AND ESTABLISHES

SELECTOR SWITCH TO D

Next: &1911, ?1925, ?1927, ?1929, ?1931, ?1933

PRESSURE BURNER MINIMUM

{GAINPCBACS}
ATTA

Next: &9, ?2002, ?2004, ?2251

TYPE OF OVERHEAT

Next: &nff, !f2299

BOILER TO TEMPERATURE RADIATORS COLD

CABLE - SELECTOR SWITCH / PUMP

Next: End

BOILER AND RADS ONLY GET WARM

TAP - ISOLATION - FLOW / RETURN

Next: End

BOILER TO TEMP RADS COOL

TAP - ISOLATION - FLOW / RETURN

Next: End

RESTRICTED OR BLOCKED 3

FILTER RETURN

Next: End

POOR SUPPLY

TAP - ISOLATION - DHW INLET

Next: End

DHW FLOW RATE

FILTER - DHW INLET

Next: End

DHW FLOW RATE

DHW FLOW RESTRICTOR/FILTER/VENTURI

Next: End

LOW

WATER SUPPLY PRESSURE

Next: End

RESTRICTED OR BLOCKED

HEAT EXCHANGER - PRIMARY

Next: End

NOP OPENING UP TO RADS FULLY

SERVICE KIT 760 - 3 PORT VALVE

Next: End

BLOWING FUSE

PUMP

Next: End

BLOWING FUSE

FAN

Next: End

BLOWN

FUSE MAINS

Next: End

DHW PUMP RUNS

FUSE 2 AMP

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

DHW FAN RUNS

PIPE - PRESSURE SWITCH

Next: End

DHW FAN RUNS

VENTURI - PRESSURE SENSING

Next: End

FAN DOES NOT RUN

SYSTEM PRESSURE

Next: End

PUMP PROVING SWITCH

TAP - ISOLATION - FLOW / RETURN

Next: End

FAN DOES NOT RUN

PUMP

Next: End

RESTRICTED OR BLOCKED

FILTER RETURN

Next: End

RESTRICTED STOPPING FLOW SWITCH MAKING

PIPE ASSEMBLY - BYPASS

Next: End

FAN DOES NOT RUN

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

CH NOISY DHW OK

PUMP

Next: End

BLOWING FUSE

GAS VALVE

Next: End

CH NOISY DHW OK

PIPE ASSEMBLY - BYPASS

Next: End

DHW IGNITION

GAS INLET PRESSURE

Next: End

DHW BURNER ESTABLISHED

SENSOR - TEMPERATURE

Next: End

HIGH FLAME NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

SYSTEM PRESSURE VESSEL

EXPANSION VESSEL

Next: End

LOW OR FLUCTUATING VOLTAGE TO FAN

PCB

Next: End

DHW BURNER IGNITION DROPPING OUT

SWITCH - AIR PRESSURE

Next: End

DHW BURNER IGNITION DROPPING OUT

PIPE - PRESSURE SWITCH

Next: End

AIR FLOW NO SPARK DROPPING OUT

HEAT EXCHANGER - PRIMARY

Next: End

DHW BURNER IGNITION DROPPING OUT

VENTURI - PRESSURE SENSING

Next: End

DHW BURNER IGNITION DROPPING OUT

FLUE

Next: End

BURNER IGNITES BUT BAFFLES OUT

GAS INLET PRESSURE

Next: End

DHW BURNER ESTABLISHED

HEAT EXCHANGER - PRIMARY

Next: End

IGNITES BAFFLES OUT

FLUE

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

GAS INLET PRESSURE

Next: End

DHW BURNER ESTABLISHED

LEAD - SENSING ELECTRODE

Next: End

SPARK NO GAS

GAS VALVE COMPENSATION TUBE

Next: End

DHW BURNER IGNITION

GAS INLET PRESSURE

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PUMP

Next: End

SPARK GAS PRESENT NO IGNITION

SPARK GAP

Next: End

NO SPARK

SPARK GAP

Next: End

DHW BURNER IGNITION

SWITCH - AIR PRESSURE

Next: End

DHW BURNER IGNITION NO SPARKING APS WIRES

CABLE - FAN / PRESSURE SWITCH

Next: End

DHW BURNER IGNITION

PIPE - PRESSURE SWITCH

Next: End

DHW BURNER IGNITION

VENTURI - PRESSURE SENSING

Next: End

AIR FLOW NO SPARK

HEAT EXCHANGER - PRIMARY

Next: End

DHW BURNER IGNITION

FLUE

Next: End

PRESSURE BURNER MINIMUM

PCB

Next: End

CH IGNITION

SWITCH SELECTOR

Next: End

CH IGNITION NO IGNITION TIMER LINK

PCB

Next: End

CH IGNITION

TIMER LINK (NO CLOCK)

Next: End

NO CLOCK IN VOLTS

PCB

Next: End

NO IGNITION

TIMER (CLOCK)

Next: End

DHW OPERATION

PIPE ASSEMBLY - BYPASS

Next: End

NOT RAMPING UP FOR CH

PCB-CONTROL KNOB ALIGNMENT

Next: End

NOT RAMPING UP FOR CH

SENSOR - TEMPERATURE

Next: End

DHW PUMP RUNS

PIPE - PRESSURE - NEGATIVE / POSITIVE

Next: End

OVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

OVERHEAT

TAP - ISOLATION - FLOW / RETURN

Next: End

OVERHEAT INVESTIGATION

PUMP

Next: End

OVERHEAT INVESTIGATION

SENSOR - TEMPERATURE

Next: End

OVERHEATING

HEAT EXCHANGER - PRIMARY

Next: End

OVERHEAT INVESTIGATION DHW IGNITION

GAS INLET PRESSURE

Next: End

OVERHEAT INVESTIGATION HIGH FLAME NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

OVERHEAT INVESTIGATION PRESSURE BURNER MINIMUM

PCB

Next: End

RESTRICTED OR BLOCKED 5

FILTER RETURN

Next: End

FLAME SENSE POSITION

FLAME SENSE POSITION

Next: End

DHW BURNER ESTABLISHED

ELECTRODE - IGNITION

Next: End

PUMP RUNS NO DEMAND

OPEN TAP OR LEAK

Next: End

DHW COOL RADS COOL

EXTERNAL MIXING

Next: End

PUMP RUNS NO DEMAND

EXTERNAL CONTROLS / TIMER

Next: End

DHW COOL RADS COOL

PUMP

Next: End

DHW NOISY

PUMP

Next: End

GAS PRESENT NO IGNITION

MANIFOLD - BURNER

Next: End

BAFFLES OUT

MANIFOLD - BURNER

Next: End

DOES NOT ESTABLISH

MANIFOLD - BURNER

Next: End

PUMP DOES NOT RUN

CABLE - SELECTOR SWITCH / PUMP

Next: End

NO IGNITION NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

MECHANICAL 2

GAS VALVE

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PUMP

Next: End

FAN DOES NOT RUNAUTO RESET OVERHEAT

SENSOR - TEMPERATURE

Next: End

LOCK OUT RESETAUTO RESET OVERHEAT

SWITCH SELECTOR

Next: End

DOES NOT ESTABLISHAUTO RESET OVERHEAT

MANIFOLD - BURNER

Next: End

DOES NOT ESTABLISH - AUTO RESET OVERHEAT

LEAD - SENSING ELECTRODE

Next: End

FAN DOES NOT RUN - AUTO RESET OVERHEAT

CABLE - TEMPERATURE / PRESSURE STATS

Next: End

TYPE OF OVERHEAT

Z BLANK

Next: End

DHW FAN RUNS

OVERHEAT THERMOSTAT

Next: End

FAN DOES NOT RUN

SENSOR - TEMPERATURE

Next: End

LOCK OUT RESET

SWITCH SELECTOR

Next: End

DHW FAN RUNS - TRIPPED WONT RESET

OVERHEAT THERMOSTAT

Next: End

OVERHEAT THERMOSTAT RESISTANCE

LEAD - IGNITION ELECTRODE

Next: End

DHW OPERATIONOVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

DHW OPERATIONOVERHEAT INVESTIGATION

PUMP

Next: End

DHW OPERATIONOVERHEATING

HEAT EXCHANGER - PRIMARY

Next: End

DHW OPERATIONOVERHEAT INVESTIGATION

SENSOR - TEMPERATURE

Next: End

CH OVERHEATOVERHEAT

TAP - ISOLATION - FLOW / RETURN

Next: End

CH OVERHEATOVERHEAT INVESTIGATION

PUMP

Next: End

CH OPERATIONCH MODULATION

SENSOR - TEMPERATURE

Next: End

CH OVERHEATRESTRICTED OR BLOCKED 5

FILTER RETURN

Next: End

CH OVERHEATS DIFF WRONG

FILTER RETURN

Next: End

NO SPARK

PCB

Next: End

SPARK GENERATOR NO SPARK

CABLE - GAS VALVE / IGNITER

Next: End

PROC

DUMMY

Next: End

DHW COLD RADS COLD

SENSOR - TEMPERATURE

Next: End

PCB-CONTROL KNOB ALIGNMENT

PCB-CONTROL KNOB ALIGNMENT

Next: End

DHW OPERATION

MANIFOLD - BURNER

Next: End

PUMP RUNS NO DEMAND

CABLE - SELECTOR SWITCH / PUMP

Next: End

NO DEMAND REC

CABLE - SELECTOR SWITCH / PUMP

Next: End

DHW PUMP RUNS

SWITCH SELECTOR

Next: End

DHW MODULATION

SENSOR - TEMPERATURE

Next: End

CH MODULATION

SENSOR - TEMPERATURE

Next: End

CH MODULATION

PCB

Next: End

DHW MODULATION

PCB

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

Next: End

DHW FLOW RATE

HEAT EXCHANGER - DHW - 10 PLATES

Next: End

DHW TEMPERATURE LOW RADIATORS COLD

HEAT EXCHANGER - DHW - 10 PLATES

Next: End

DHW

SERVICE KIT 760 - 3 PORT VALVE

Next: End

MISCELANEOUS FAULT

PCB

Next: End

BLOWING FUSE

CABLE - SELECTOR SWITCH / PUMP

Next: End

BLOWING FUSE

CABLE - FAN / PRESSURE SWITCH

Next: End

PCB BLOWING FUSE

PCB FUSE INVESTIGATION

Next: End

DHW PUMP RUNS

Next: End

BLANK FOR FUSE INVESTIGATION

Z BLANK

Next: End

BLANK FOR FUSE INVESTIGATION (APPLIANCE FUSE)

Z BLANK

Next: End

DHW FAN RUNS APS WIRES SHORTED

CABLE - FAN / PRESSURE SWITCH

Next: End

DHW FAN RUNS

SWITCH - AIR PRESSURE

Next: End

DHW FAN RUNS

FAN

Next: End

NO POWER TO FAN FULL MODEL

CABLE - FAN / PRESSURE SWITCH

Next: End

DHW FAN RUNS

SERVICE KIT - DIAPHRAGM STUFFING BOX AND WASHER (CH)

Next: End

DHW FAN RUNS

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

FAN DOES NOT RUN

SERVICE KIT 760 - 3 PORT VALVE

Next: End

FAN DOES NOT RUN

HEAT EXCHANGER - PRIMARY

Next: End

BLOWING FUSE 2

CABLE - GAS VALVE / IGNITER

Next: End

MISCELANEOUS FAULT 3

PCB

Next: End

PRESSURE BURNER MAXIMUM

GAS VALVE ADJUSTMENT

Next: End

SENSOR - DHW DIES OUT

CABLE - TEMPERATURE / PRESSURE STATS

Next: End

MINIMUM SET WRONG ON MODUREG

GAS VALVE

Next: End

DHW BURNER IGNITION DROPPING OUT

FAN

Next: End

OBSERVATION BURNER IGNITES AND ESTABLISHES - DOES NOT ESTABLISH

GAS VALVE

Next: End

SPARKING NO IGNITION - RESISTANCE OK

GAS VALVE

Next: End

DHW BURNER IGNITION

ELECTRODE - IGNITION

Next: End

NO SPARK - NO LOCKOUT

PCB

Next: End

DHW BURNER IGNITION

FAN

Next: End

PRESSURE BURNER MINIMUM

GAS VALVE ADJUSTMENT

Next: End

CH IGNITION

EXT CONTROLS / LINK

Next: End

CH IGNITION

PCB

Next: End

NO IGNITION CLOCK OK

PCB

Next: End

DHW OPERATION

HEAT EXCHANGER - PRIMARY

Next: End

DHW PUMP RUNS

SERVICE KIT - DIAPHRAGM STUFFING BOX AND WASHERS (DHW)

Next: End

DHW PUMP RUNS - STUFFING BOX

SERVICE KIT - DIAPHRAGM STUFFING BOX AND WASHERS (DHW)

Next: End

DHW VENTURI

HYDRAULIC VENTURI ASSEMBLY

Next: End

DHW PUMP RUNS - SPINDLE

VALVE - DHW FLOW

Next: End

RESTRICTED / BLOCKED

HEAT EXCHANGER - DHW - 10 PLATES

Next: End

OVERHEAT INVESTIGATIONPRESSURE BURNER MAXIMUM

GAS VALVE ADJUSTMENT

Next: End

OVERHEAT INVESTIGATION MINIMUM SET WRONG ON MODUREG

GAS VALVE

Next: End

OVERHEAT INVESTIGATION PRESSURE BURNER MINIMUM

GAS VALVE ADJUSTMENT

Next: End

OVERHEAT INVESTIGATION

PCB

Next: End

CUTTING OUT EARLY

OVERHEAT THERMOSTAT

Next: End

OVERHEAT INVESTIGATION

OVERHEAT

Next: End

BOILER AND RADS ONLY GET WARM

VALVE - DHW FLOW

Next: End

BOILER AND RADS ONLY GET WARM

SERVICE KIT - DIAPHRAGM STUFFING BOX AND WASHERS (DHW)

Next: End

BOILER AND RADS ONLY GET WARM - STUFFING BOX

SERVICE KIT - DIAPHRAGM STUFFING BOX AND WASHERS (DHW)

Next: End

PUMP RUNS NO DEMAND

VALVE - DHW FLOW

Next: End

PUMP RUNS NO DEMAND

SERVICE KIT - DIAPHRAGM STUFFING BOX AND WASHERS (DHW)

Next: End

PUMP RUNS NO DEMAND - STUFFING BOX

SERVICE KIT - DIAPHRAGM STUFFING BOX AND WASHERS (DHW)

Next: End

PUMP RUNS NO DEMAND

PCB

Next: End

DHW BURNER IGNITION

MANIFOLD - BURNER

Next: End

BURNER IGNITES BUT BAFFLES OUT

GAS VALVE

Next: End

DHW BURNER ESTABLISHED

PCB

Next: End

DHW PUMP RUNS

PUMP

Next: End

FAULT 1

CABLE - GAS VALVE / IGNITER

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PCB

Next: End

PRESSURE BURNER MINIMUM - TOO LOW

GAS VALVE ADJUSTMENT

Next: End

SENSOR - FAN NOT RUNNINGAUTO RESET OVERHEAT

CABLE - TEMPERATURE / PRESSURE STATS

Next: End

DHW BURNER ESTABLISHEDAUTO RESET OVERHEAT

PCB

Next: End

DOES NOT ESTABLISH - HARNESS (KIT NEEDED)

OVERHEAT THERMOSTAT

Next: End

MISCELANEOUS FAULT 4AUTO RESET OVERHEAT

PCB

Next: End

OVERHEAT THERMOSTAT

CABLE - TEMPERATURE / PRESSURE STATS

Next: End

SENSOR - FAN NOT RUNNING

CABLE - TEMPERATURE / PRESSURE STATS

Next: End

MISCELANEOUS FAULT 4

PCB

Next: End

OVERHEAT FURTHER INVESTIGATION

Z BLANK

Next: End

DHW OPERATIONRESTRICTED / BLOCKED

HEAT EXCHANGER - DHW - 10 PLATES

Next: End

DHW OPERATION OVERHEAT

PCB

Next: End

CH OPERATIONCH MODULATION

PCB

Next: End

CH OVERHEATCUTTING OUT EARLY

OVERHEAT THERMOSTAT

Next: End

CH OVERHEATOVERHEATING

HEAT EXCHANGER - PRIMARY

Next: End

DHW OPERATION CUTTING OUT EARLY

OVERHEAT THERMOSTAT

Next: End

NO SPARKING

IGNITOR C/W LEAD

Next: End

DHW OPERATION

HEAT EXCHANGER - DHW - 10 PLATES

Next: End

CH NOISY DHW OK

Next: End

POOR DHW

PCB

Next: End

MAINS LED NOT ILLUMINATED

PCB

Next: End

SELECTOR SWITCH

SWITCH SELECTOR

Next: End

DHW PUMP RUNS

CABLE - PCB INPUT

Next: End

DHW noisy operation

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p2211

DHW temperature low, radiators cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p2182

DHW temperature low, radiators hot

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p1470

BOILER AND RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2029

BOILER UP TO TEMPERATURE RADIATORS COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p166

CH noisy, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION

Next: p168

DIAPHRAGM SPLIT OR WORN

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1818

SPINDLE CORRODED OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1820

DIFFERENTIAL VALVE WATERWAYS BLOCKED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1822

BURNER PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE BURNER MAXIMUM

Next: p1913

BURNER PRESSURE EXCESSIVE

CHARACTERISTIC TEST FROM PRESSURE BURNER MAXIMUM

Next: !p1915

NO SPARKING SEEN

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1926

SPARKING SEEN BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1928

BURNER IGNITES BUT BOILER GOES TO LOCKOUT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1930

Burner ignites but baffles out

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1932

BURNER IGNITES THEN DROPS OUT AND RE IGNITES

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1934

MINIMUM PRESSURE INCORRECT - TOO HIGH

CHARACTERISTIC TEST FROM PRESSURE BURNER MINIMUM

Next: p2003

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM PRESSURE BURNER MINIMUM

Next: p2011

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p2104

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p2106

SPINDLE DAMAGED OR SCALED UP

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW (NOT RUNNING)

Next: !p2120

BURNER PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE BURNER MAXIMUM

Next: p2137

BURNER PRESSURE EXCESSIVE

CHARACTERISTIC TEST FROM PRESSURE BURNER MAXIMUM

Next: !p2139

BOILER CONTINUES TO HEAT PAST 80 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p2151

BOILER OVERHEATS BELOW 80 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p2153

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p2165

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p2167

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p2178

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p2180

MINIMUM PRESSURE INCORRECT - TOO LOW

CHARACTERISTIC TEST FROM PRESSURE BURNER MINIMUM

Next: !p2252

BOILER OVERHEATS ON DHW OPERATION

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p2337

BOILER OVERHEATS ON CH OPERATION

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2435

MAINS LED FLASHING

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: !p1475

MAINS LED NOT ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: p807

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM DHW PUMP RUNS

Next: p822

PUMP RUNS WITH NO DEMAND

CHARACTERISTIC TEST FROM DHW PUMP RUNS

Next: p824

24/11/2020 13:09:59 2011_1_50_1 04/01/2021 11:34:04

25/11/2020 11:19:03

Next: End

WATER SUPPLY TO PREMISES

TURN ON A COLD WATER TAP

Next: p1432, !f1439

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1441, !f1442

INSPECTION 3-WAY VALVE OPERATION

DISCHARGE AND DRAIN THE HOT WATER CIRCUIT

Next: p2162, !f1468

RESISTANCE PUMP AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR M1 FROM THE PCB

Next: p1501, f1500

RESISTANCE PUMP FUSE INVESTIGATION

REMOVE THE COVER FROM THE PUMP ASSEMBLY
REMOVE THE WIRES FROM THE PUMP ASSEMBLY

Next: !p1502, !f1503

RESISTANCE FAN FUSE INVESTIGATION

DISCONNECT LIVE AND NEUTRAL LEADS FROM FAN

Next: !p1506, !f1507

RESISTANCE FUSE MAINS

GAIN ACCESS TO THE MAINS FUSE FOR THE APPLIANCE

Next: !p1517, f1518

FUSE FURTHER INVESTIGATION (MAINS)

Next: !p1519, !f1520

FUSE FURTHER INVESTIGATION (APPLIANCE)

Next: !p1522, !f1523

RESISTANCE APS AND HARNESS (N/C)

{GAINPCBACS}
DISCONNECT CONNECTOR M5 FROM THE PCB

Next: p1795, f1796

RESISTANCE APS (N/C)

DISCONNECT THE BLACK

Next: !p1797, f1798

INSPECTION AIR PRESSURE SWITCH TUBES

REMOVE INNER COMBUSTION COVER TO GAIN ACCESS TO THE FAN AREA

Next: p1799, !f1800

FAN VOLTAGE AT PCB

{GAINPCBACS}
SELE

Next: !p1805, f1806

PUMP PROVING SWITCH SPINDLE

SELECTOR SWITCH IN D

Next: p1807, f1808

CHECK FOR TRAPPED AIR AND SYSTEM WATER PRESSURE

ENSURE THE PUMP IS NOT RUNNING AS THIS MAY ALTER THE PRESSURE SHOWN

Next: p1809, !f1810

RESISTANCE GAS VALVE

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: !p1887, !f1888

RESISTANCE SENSOR CH

REMOVE CONNECTOR FROM THE TEMPERATURE SENSOR

Next: !p1920, !f1921

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: !p1955, !f1956

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: p2230, !f1968

SPARK GENERATOR (OUTPUT)

REMOVE THE LEAD FROM

Next: p1979, f1980

RESISTANCE ELECTRODE LEAD

REMOVE THE ELECTRODE LEAD

Next: p2326, !f2333

RESISTANCE HARNESS APS

{GAINPCBACS}
DISCONNECT M5 FROM THE PCB
DISCONNECT BLUE WIRE FROM THE APS

Next: !p1991, !f1992

ROOM THERMOSTAT / EXTERNAL TIMER INPUT

{GAINPCBACS}
SELE

Next: !p2014, !f2015

TIMER LINK IN VOLTS INPUT

{GAINPCBACS}
SELE

Next: p2018, !f2019

INTERNAL-BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p2027, !f2028

INSPECTION PRESSURE SYSTEM

Next: p2122, !f2123

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p2132, !f2133

VOLTAGE GAS VALVE AT PCB (MINIMUM)

{GAINPCBACS}
TURN POTENTIOMETER MARKED P4 MAX FULLY ANTICLOCKWISE

Next: !p2146, !f2147

OBSERVATION ISOLATE DHW

TURN DHW ISOLATION VALVE OFF

Next: p2175, !f2181

RESISTANCE GAS VALVE

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: !p2241, !f2245

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: p2268, f2269

RESISTANCE SENSOR CH

REMOVE CONNECTOR FROM THE TEMPERATURE SENSOR

Next: !p2270, !f2271

RESISTANCE FLAME SENSE LEAD AND OVERHEAT

DISCONNECT FLAME SENSE LEAD FROM ELECTRODE
DISCONNECT FLAME SENSE / OVERHEAT PLUG FROM PCB

Next: p2281, f2284

FLAME SENSE LEAD (AUTO RESET OVERHEAT)

Next: !p2290, !f2293

RESISTANCE OVERHEAT THERMOSTAT AND HARNESS

DISCONNECT M2 FROM THE PCB

Next: p2314, f2315

OVERHEAT THERMOSTAT RESISTANCE

REMOVE TWO CONNECTORS FROM OVERHEAT THERMOSTAT

Next: !p2316, !f2317

RESISTANCE SENSOR CH

REMOVE CONNECTOR FROM THE TEMPERATURE SENSOR

Next: !p2320, !f2321

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p2419, !f2420

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: !p2423, !f2424

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: !p2496, !f2497

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p2512, !f2513

MAINS POWER SUPPLY

{GAINPCBACS}

Next: p810, f1516

FUSE (2 AMP) RESISTANCE

REMOVE FUSE FROM FUSE HOLDER LOCATED IN THE MAIN TERMINAL BLOCK

Next: !p814, f1521

INSPECTION DIFFERENTIAL VALVE DHW (NOT RUNNING)

ISOLATE DHW COLD FEE

Next: p2114, ?2103, ?2105, ?2119

DHW DEMAND MICROSWITCH OPERATION

REMOVE THE M1 CONNECTOR FROM THE PCB.

Next: p846, !f847

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: !p1009, !f908

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: !p1008, !f911

DHW DEMAND MICROSWITCH OPERATION

REMOVE THE M1 CONNECTOR FROM THE PCB.

Next: p1155, !f1086

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p2248, !f1151

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p175, !f1161

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1164, !f1165

INSPECTION DHW INLET VALVE

Next: p1433, !f1434

DHW INLET FILTER

DHW CIRCUIT OF APPLIANCE DRAINED AND DISCHARGED

Next: p1435, !f1436

DHW FLOW RESTRICTOR/FILTER

BOILER DRAINED AND DISCHARGED

Next: !p1437, !f1438

RESISTANCE FAN AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR M5 FROM THE PCB

Next: p1504, f1505

RESISTANCE GAS VALVE AND HARNESS FUSE INVESTIGATION

REMOVE THE M4 CONNECTOR FROM THE PCB

Next: !p1508, f1886

DHW SPINDLE

Next: p1080, f1466

PUMP LIMPET TEST

Next: p187, !f188

PUMP LIMPET TEST

Next: p1163, !f197

FAN VOLTS

SELECTOR SWITCH TO O

Next: !p1803, f1804

VENTURI

Next: !p1801, !f1802

CH DEMAND MICROSWITCH OPERATION

REMOVE THE RED LEADS

Next: p2253, !f1828

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1811, !f1812

PUMP LIMPET TEST

Next: p1813, !f1814

INSPECTION CH DIFFERENTIAL VALVE

APPLIANCE DRAINED AND DISCHARGED

Next: p1815, ?1817, ?1819, ?1821

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: p1823, !f1824

INTERNAL-BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p1825, !f1826

INTERNAL-BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p414, !f190

OBSERVATION HAS OVERHEAT TRIPPED

ENSURE BOILER IS COOL

Next: p2301, f2313

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: p1916, !f1917

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: p1918, f1919

VOLTAGE GAS VALVE AT PCB (MAXIMUM)

{GAINPCBACS}
SELE

Next: !p1922, !f1923

OBSERVATION DOES BOILER GO TO LOCKOUT

Next: p1977, f1978

INSPECTION COMPENSATION PIPE

Next: p1963, !f1964

PRESSURE BURNER ON IGNITION

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: p1953, f1954

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: p1947, !f1948

VOLTAGE FAN AT PCB AIR FLOW

{GAINPCBACS}
SELE

Next: p1935, !f1936

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1937, !f1938

INSPECTION AIR PRESSURE SWITCH TUBES

REMOVE INNER COMBUSTION COVER TO GAIN ACCESS TO THE FAN AREA

Next: p1939, !f1940

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1941, !f1942

VENTURI

Next: p1943, !f1944

INSPECTION FLUE

Next: !p1945, !f1946

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1949, !f1950

INSPECTION FLUE

Next: p2221, !f1952

FLAME SENSE POSITION

Next: p1957, !f2159

FLAME SENSE ELECTRODE

Next: p2274, !f2160

FLAME SENSE LEAD

Next: p2224, !f1962

PRESSURE BURNER ON IGNITION

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: p1965, f1966

ELECTRODE GAP

Next: p2218, !f1976

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
SELE

Next: !p1969, !f2242

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1987, !f1988

ELECTRODE GAP

Next: !p1985, !f1986

OBSERVATION SPARKING WITH APS PROVEN

DISCONNECT THE RIGHT HAND TUBE(+VE) FROM THE VENTURI AND CONNECT THE AIR PRESSURE SWITCH CHARGE KIT

Next: p1989, f1990

INSPECTION AIR PRESSURE SWITCH TUBES

REMOVE INNER COMBUSTION COVER TO GAIN ACCESS TO THE FAN AREA

Next: p1993, !f1994

VENTURI

Next: p1995, !f1996

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1997, !f1998

INSPECTION FLUE

Next: !p1999, !f2000

VOLTAGE GAS VALVE AT PCB (MINIMUM)

{GAINPCBACS}
TURN POTENTIOMETER MARKED P4 MAX FULLY ANTICLOCKWISE

Next: !p2006, !f2007

EXTERNAL CONTROLS/RTC OUTPUT

{GAINPCBACS}
SELE

Next: p2012, f2013

CLOCK FITTED

Next: p2016, f2017

CLOCK IN VOLTS INPUT

{GAINPCBACS}
SELE

Next: p2022, !f2023

TIMER LINK RESISTANCE

DISCONNECT CONNECTOR M3 FROM THE PCB

Next: !p2020, !f2021

CLOCK RESISTANCE

DISCONNECT CONNECTOR M3 FROM THE PCB

Next: !p2024, !f2025

INSPECTION PCB CONTROL KNOBS

{GAINPCBACS}

Next: p2062, !f2044

RESISTANCE SENSOR CH

REMOVE CONNECTOR FROM THE TEMPERATURE SENSOR

Next: p1141, !f2074

DHW SENSING PIPES

BOILER DRAINED AND DISCHARGED

Next: !p2115, !f2116

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p2124, !f2125

PUMP LIMPET TEST

Next: p2126, !f2127

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: p2128, !f2129

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: p2130, f2131

PRESSURE BURNER MAXIMUM

ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: p2134, ?2136, ?2138

PRESSURE BURNER MINIMUM (OVERHEAT)

{GAINPCBACS}
ATTA

Next: p2144, f2145

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: p2140, !f2141

VOLTAGE GAS VALVE AT PCB (MAXIMUM)

{GAINPCBACS}
SELE

Next: !p2142, !f2143

OBSERVATION RUN BOILER UP TO TEMPERATURE

CH TEMPERATURE SELEC

Next: p2148, ?2150, ?2152

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p2154, !f2155

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATE DHW COLD FEE

Next: !p2163, ?2164, ?2166

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATE DHW COLD FEE

Next: !p2176, ?2177, ?2179

OBSERVATION EXTERNAL MIXING

Next: p2198, !f2194

OBSERVATION DISCONNECT TIMER / LINK

DISCONNECT CONNECTOR M3 FROM THE PCB AND MAKE SAFE
SELECTOR SWITCH IN DHW & CH POSITION

Next: !p2197, !f2196

PUMP LIMPET TEST

Next: p705, !f2210

PUMP LIMPET TEST

Next: p352, !f2217

INSPECTION BURNER

Next: !p2219, !f2220

INSPECTION BURNER

Next: !p2222, !f2223

INSPECTION BURNER

Next: !p2225, !f2226

RESISTANCE HARNESS PUMP

REMOVE THE COVER FROM THE PUMP ASSEMBLY
DISCONNECT M1 FROM THE PCB

Next: !p2228, !f2229

RESISTANCE GAS VALVE AND HARNESS

REMOVE THE M4 CONNECTOR FROM THE PCB

Next: p1967, f2238

PUMP LIMPET TEST

Next: !p2249, !f2250

OBSERVATION TYPE OF OVERHEAT STAT

Next: p1898, f2267

LOCK OUT RESET SWITCH

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH
ATTACH CROCODILE CLIPS TO EXPOSED TERMINALS

Next: p2294, !f2273

OBSERVATION TYPE OF OVERHEAT STAT

Next: p1959, f2280

INSPECTION BURNER

Next: !p2282, !f2283

RESISTANCE ORIGINAL OVERHEAT STAT LINK

DISCONNECT M2 FROM THE PCB

Next: !p2295, !f2297

OVERHEAT FURTHER INVESTIGATION

TURN HOT WATER TAP O

Next: !p2324, !f2325

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: p2318, f2319

LOCK OUT RESET SWITCH

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH
ATTACH CROCODILE CLIPS TO EXPOSED TERMINALS

Next: !p2322, !f2323

VOLTAGE SPARK GENERATOR AT PCB

REMOVE CONNECTOR FROM SPARK GENERATOR AND MAKE SAFE
SELECTOR SWITCH TO DHW POSITION

Next: p2518, !f2517

INSPECTION PRESSURE SYSTEM

Next: p2372, !f2339

PUMP LIMPET TEST

Next: p2416, !f2374

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: p2417, f2418

DHW MODULATION

SET FLOW RATE AT TAP

Next: !p2514, f2422

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p2436, !f2437

PUMP LIMPET TEST

Next: p2491, !f2439

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: p2492, f2511

CH MODULATION

ATTACH A U-GAUGE TO

Next: p2508, f2495

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p2509, !f2510

RESISTANCE HARNESS SPARK GENERATOR

DISCONNECT PLUG FROM SPARK GENERATOR

Next: !p2519, !f2520

CH OPERATION (DHW OPERATION)

SELECTOR SWITCH TO D

Next: !p353, f2026

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: p706, f1440

RESISTANCE SENSOR CH AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR M2 FROM THE PCB

Next: p708, !f709

INSPECTION PCB CONTROL KNOBS

{GAINPCBACS}

Next: p710, !f711

INSPECTION BURNER MANIFOLD

REMOVE THE BURNER ASSEMBLY

Next: !p712, !f713

POWER TO CONTROL BOARD

{GAINPCBACS}
SELECTOR SWITCH TO DHW POSITION

Next: !p808, f809

SELECTOR SWITCH VOLTAGE

SELECTOR SWITCH TO OFF POSITION

Next: !p812, f813

DHW DEMAND

HOT TAP TURNED OFF

Next: p836, f837

OPERATION DIFFERENTIAL VALVE DHW

Next: p825, f2168

RESISTANCE DHW MICROSWITCH AND HARNESS

REMOVE THE M1 CONNECTOR FROM THE PCB.
DHW TAPS OFF

Next: p2195, !f833

PUMP VOLTS

{GAINPCBACS}
SELE

Next: p2227, f845

LOCK OUT RESET SWITCH

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH
ATTACH CROCODILE CLIPS TO EXPOSED TERMINALS

Next: !p1890, !f849

System Information

Total Tests: 414

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control