XSol Diagnostic System

Interactive Test Sequence Navigator

Welcome to the XSol Diagnostic System

This system provides interactive diagnostic tests with proper sequence navigation based on the decoded .seq file logic.

Start Diagnostic Sequence

or choose a specific test below:

BAXI MAIN ECO COMBI

WARNING - IMPORTA

Next: &1, *

NO FAULT FOUND

Next: nff

CASE REMOVAL


Next: &2570, !f2

POWER UP SELF CHECK

ENSURE NO DEMANDS

Next: &513, ?9, ?1332, ?1334, ?1406, ?1676, ?2572

OBSERVATION FAN RUNS, BURNER IGNITES AND ESTABLISHES

ENSURE APPLIANCE IS COOL

Next: &1282, ?443, ?445, ?1574, ?1576

CH OPERATION

Next: &1838, ?538, ?540, ?1288

FAULT CODE - SENSORS

NOT USED

Next: &nff, f2490

FAULT CODE - MISCELLANEOUS

NOT USED

Next: &nff, f506

FAULT CODE - PARAMETER FAULT

NOT USED

Next: &nff, f1885

FAULT CODE FAN FAULT

NOT USED

Next: &nff, f400

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &1273, !f514

STATUS CODE - SHUTDOWN INPUT

NOT USED

Next: &nff, f657

STATUS CODE - COMMUNICATION FAULT

NOT USED

Next: &nff, f670

STATUS CODE - MISCELLANEOUS

NOT USED

Next: &nff, f675

& FUSE PCB FURTHER INVESTIGATION

NOT USED

Next: &nff, f1821

ERROR CODE / STATUS CODE - OVERHEAT / TEMPERATURE PROTECTION

OK TO BE BLANK

Next: &nff, f869

OBSERVATION DHW FLOW RATE

Next: &29, f1274

PRESSURE GAS INLET

SLIGHTLY DISENGAGE T

Next: &1284, !f1283

OPERATION DHW

Next: &1285, ?1292, ?1294, ?1296, ?1298

COMBUSTION PERFORMANCE ANALYSIS

Next: &1914, f1850

OBSERVATION CH DEMAND RECOGNISED

Next: &44, f2369

OBSERVATION PUMP OVERRUN

Next: &nff, !f1839

HOW TO SET APPLIANCE TO FULL AND PART LOAD

SETTING THE APPLI

Next: &nff, !f1841

INITIAL SETUP AND DESCRIPTION OF KEYS INFORMATION PAGE

Next: &3, !f1895

CH OPERATION IMPORTANT INFORMATION

Next: &1528, !f1915

DHW FLOW SENSOR ERROR CODE

NOT USED

Next: &nff, f2485

INFORMATION RESETTING APPLIANCE

Next: &1894, !f2571

POOR FLOW RATE

DHW ISOLATION VALVE

Next: End

POOR FLOW RATE

MAINS WATER SUPPLY

Next: End

POOR FLOW RATE

CARTRIDGE RESTRICTOR

Next: End

INCORRECT INLET PRESSURE

GAS INLET PRESSURE

Next: End

EXCESSIVE PRESSURE RISE

EXPANSION VESSEL

Next: End

STATUS CODE

Z REDIRECTION

Next: End

FAULT CODES

Z REDIRECTION

Next: End

APPLIANCE FIRES WITH NO DEMAND

KIT - SENSOR

Next: End

PUMP DOES NOT RUN

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

APPLIANCE FIRES WITH NO DEMAND 1

KIT - SENSOR

Next: End

APPLIANCE FIRES WITH NO DEMAND

PLUMBING ISSUE

Next: End

FAN RUNS

KIT - SENSOR

Next: End

DHW RUNS HOT THEN COLD

SYSTEM PRESSURE

Next: End

DHW RUNS HOT THEN COLD

KIT - SENSOR

Next: End

DHW RUNS HOT THEN COLD 1

KIT - SENSOR

Next: End

DHW RUNS HOT THEN COLD

PUMP C/W SEAL

Next: End

POOR HW COOL RADS

SYSTEM PRESSURE

Next: End

POOR HW COOL RADS

KIT - SENSOR

Next: End

POOR HW COOL RADS 1

KIT - SENSOR

Next: End

FAILED GAS RATE

TRAP - CONDENSATE C/W SEAL

Next: End

FAILED GAS RATE

AIR INTAKE

Next: End

FAILED COMBUSTION TEST

FLUE

Next: End

DHW TOO HOT

KIT - SENSOR

Next: End

DHW TOO HOT 1

KIT - SENSOR

Next: End

NO POWER TO DIVERTER MOTOR DHW

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BOILER UP TO TEMP RADS COLD

ISOLATION VALVES

Next: End

NO POWER TO DIVERTER MOTOR

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

POOR HW COOL RADS

PUMP C/W SEAL

Next: End

FAN DOES NOT RUN

SET - CABLE

Next: End

BURNER IGNITION

TRAP - CONDENSATE C/W SEAL

Next: End

BURNER IGNITION

GAS INLET PRESSURE

Next: End

BOILER NOISY

GAS INLET PRESSURE

Next: End

FAN DOES NOT RUN

KIT - SENSOR

Next: End

FAN RUNS 2

KIT - SENSOR

Next: End

LEDS DO NOT ILLUMINATE

MAINS FUSE

Next: End

LEDS DO NOT ILLUMINATE

FUSE F1

Next: End

FAULT CODE OVERHEAT 4

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAULT CODE OVERHEAT 8

KIT - SENSOR

Next: End

FAULT CODE OVERHEAT

SYSTEM PRESSURE

Next: End

OVERHEAT FAULT CODE

ISOLATION VALVES

Next: End

OVERHEAT 1

KIT - SENSOR

Next: End

OVERHEAT 2

KIT - SENSOR

Next: End

NO PUMP OVERRUN

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FUSE INVESTIGATION 1

3-WAY VALVE C/W ACTUATOR

Next: End

FUSE INVESTIGATION

3-WAY VALVE C/W ACTUATOR

Next: End

FUSE INVESTIGATION

PUMP C/W SEAL

Next: End

PUMP OVERRUN

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FULL AND PART LOAD GUIDANCE

Z REDIRECTION

Next: End

FAILED COMBUSTION TEST

COMBUSTION SEALS

Next: End

FAILED COMBUSTION TEST

AIR INTAKE

Next: End

FAULT CODE PARAMETER

SET - CABLE

Next: End

SET UP AND DESCRIPTION OF KEYS PAGE

Z REDIRECTION

Next: End

NOT OPENING TO RADS

3-WAY VALVE C/W ACTUATOR

Next: End

CH OPERATION INFORMATION

Z REDIRECTION

Next: End

CH DOES NOT RESPOND 2

240V EXTERNAL CONTROL WIRING

Next: End

CH DOES NOT RESPOND 1

240V EXTERNAL CONTROL WIRING

Next: End

APPLIANCE FIRES WITH NO DEMAND

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BOILER SYS COOL

KIT - SENSOR

Next: End

BOILER SYS COOL 2

KIT - SENSOR

Next: End

BOILER SYS COOL

CONTROLLER - USER INTERACTION

Next: End

CASE OFF

Z REDIRECTION

Next: End

FAILED GAS RATE

BURNER MESH C/W GASKET

Next: End

PARAMETER FAULT CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

PARAMETER ERROR CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

MISC ERROR CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FUSE INVESTIGATION GAS VALVE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FUSE INVESTIGATION FAN

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAN FAULT

ERROR CODE RESET

Next: End

FAN ERROR CODE

FAN ELECTRICAL CONNECTIONS

Next: End

CH DEMAND NOT RECOGNISED 1

Next: End

CH DEMAND NOT RECOGNISED 2

Next: End

CH NOT RECOGNISED 2

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CH DOES NOT RESPOND

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CH DOES NOT RESPOND 1

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CH NOT RECOGNISED 1

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BURNER IGNITION

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

AIR INTAKE

AIR INTAKE

Next: End

BURNER IGNITION 2

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BURNER IGNITION

FLUE

Next: End

BURNER IGNITION

SET - ELECTRODES C/W SCREW & GASKET

Next: End

BURNER IGNITION 2

BURNER MESH C/W GASKET

Next: End

BURNER DOES NOT IGNITE AND EST

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BURNER DOES NOT IGNITE & EST

AIR INTAKE

Next: End

BURNER DOES NOT IGNITE & EST

FLUE

Next: End

BURNER DOES NOT IGNITE & EST 2

SET - ELECTRODES C/W SCREW & GASKET

Next: End

BURNER DOES NOT IGNITE & EST

BURNER MESH C/W GASKET

Next: End

OVERHEAT

Next: End

POOR HW RADS COOL

EXTERNAL MIXING

Next: End

PUMP RUNS CONTINUOUSLY

KIT - SENSOR

Next: End

PUMP RUNS CONTINUOUSLY 1

KIT - SENSOR

Next: End

PUMP RUNS CONTINUOUSLY

HMI CABLE

Next: End

LEDS NOT ILLUMINATED

HMI CABLE

Next: End

PWR UP SELF TEST

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BOILER NOISEY

AIR INTAKE

Next: End

BOILER NOISY

FLUE

Next: End

FAN DOES NOT RUN

HMI CABLE

Next: End

FAN RUNS 2

CONTROLLER - USER INTERACTION

Next: End

PUMP DOES NOT RUN

HMI CABLE

Next: End

NO CH

HMI CABLE

Next: End

NO CH 1

HMI CABLE

Next: End

CH DOES NOT RESPOND 2

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CH NOT RECOGNISED

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CH DOES NOT RESPOND

240V EXTERNAL CONTROL WIRING

Next: End

CH DEMAND NOT RECOGNISED

Next: End

NO CH 2

HMI CABLE

Next: End

COMM FAULT

WIRING HARNESS CONNECTIONS / WATER INGRESS

Next: End

COMM FAULT

HMI CABLE

Next: End

MISC FAULT CODE

WIRING HARNESS CONNECTIONS / WATER INGRESS

Next: End

BOILER NOISY

COMBUSTION SEALS

Next: End

BOILER NOISY

TRAP - CONDENSATE C/W SEAL

Next: End

BOILER NOISY

BURNER MESH C/W GASKET

Next: End

GAS VALVE FAULT 3

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAILED COMBUSTION TEST

BURNER MESH C/W GASKET

Next: End

FAILED COMBUSTION TEST

TRAP - CONDENSATE C/W SEAL

Next: End

FAILED FLUE INTEGRITY TEST

FLUE

Next: End

COMBUSTION PERFORMANCE ANALYSIS

COMBUSTION VALUES CORRECTLY ADJUSTED

Next: End

POOR HW RADS COOL

FILTER

Next: End

DHW RUNS HOT THEN COLD

FILTER

Next: End

OVERHEAT

HEAT ENGINE

Next: End

OVERHEAT

FILTER

Next: End

DHW FLOWS SENSOR ERROR CODE

SET - CABLE

Next: End

FAULT CODE 2

KIT - SENSOR

Next: End

FAULT CODE

KIT - SENSOR

Next: End

FAULT CODE SENSORS

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

SENSOR ERROR CODE

SET - CABLE

Next: End

NO SUPPLY VOLTAGE TO FLOW SENSOR

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

POOR HW

CONTROLLER - USER INTERACTION

Next: End

POOR HW

HMI CABLE

Next: End

INFORMATION RESETTING APPLIANCE

Z REDIRECTION

Next: End

CHIMNEY SWEEP ILLUMINATED SOLID

BUTTONS STUCK IN

Next: End

DIAGNOSTIC PROCEDURE

Z REDIRECTION

Next: End

STATUS CODE SHUTDWN 2

CONTROLLER - USER INTERACTION

Next: End

STATUS CODE MISC

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

LIMPET TEST

PUMP C/W SEAL

Next: End

BOILER UPTO TEMP RADS COOL

Next: End

FAULT CODE OVERHEAT

PUMP C/W SEAL

Next: End

POOR FLOW RATE

HEAT EXCHANGER - PLATE C/W SEALS

Next: End

BLOCKED OR RESTRICTED

PIPE ASSEMBLY - EXPANSION VESSEL

Next: End

STATUS CODE 2

Z REDIRECTION

Next: End

FAULT CODES 1

Z REDIRECTION

Next: End

APPLIANCE FIRES WITH NO DEMAND

FROST PROTECTION

Next: End

PUMP DOES NOT RUN

PUMP C/W SEAL

Next: End

DHW RUNS HOT THEN COLD

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

DHW RUNS HOT THEN COLD

HEAT ENGINE

Next: End

POOR HW RADS COOL

HEAT ENGINE

Next: End

DHW TOO HOT

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAILED GAS RATE

INTERFACE - FLUE C/W SEAL

Next: End

FAILED GAS RATE

INTERFACE - SUMP

Next: End

POOR HW RADS HEATING UP

3-WAY VALVE C/W ACTUATOR

Next: End

POOR HW RADS HEAT UP

3-WAY VALVE C/W ACTUATOR

Next: End

BOILER UP TO TEMP RADS COLD

3-WAY VALVE C/W ACTUATOR

Next: End

FAN DOES NOT RUN

SENSOR - FLOW - DHW

Next: End

BOILER NOISY

INTERFACE - FLUE C/W SEAL

Next: End

BOILER NOISY

INTERFACE - SUMP

Next: End

LEDS DO NOT ILLUMINATE

Next: End

FUSE FURTHER INVESTIGATION MAINS

Z REDIRECTION

Next: End

FUSE FURTHER INVESTIGATION

Z REDIRECTION

Next: End

FAULT CODE OVERHEAT 6

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAULT CODE OVERHEAT

SET - CABLE

Next: End

OVERHEAT 1

SET - CABLE

Next: End

OVERHEAT 2

SET - CABLE

Next: End

PWR UP SELF TEST

COMBUSTION CONTROL UNIT - FUSE INVESTIGATION

Next: End

FAILED COMBUSTION TEST

INTERFACE - FLUE C/W SEAL

Next: End

FAILED COMBUSTION TEST

INTERFACE - SUMP

Next: End

FAN DOES NOT RUN

FAN ELECTRICAL CONNECTIONS

Next: End

PARAMETER FAULT

ERROR CODE RESET

Next: End

APPLIANCE FIRES WITH NO DEMAND

SENSOR - FLOW - DHW

Next: End

BOILER SYS COOL

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAILED COMBUSTION TEST

HEAT ENGINE FLUEWAYS

Next: End

FAN FAULT CODE 3

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAN DOES NOT RUN

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAN SEIZED

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

INCORRECT FAN RESISTANCES

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

GAS VALVE FAULT 2

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BEARING PLATE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAN FAULT CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

MISCELLANEOUS ERROR CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAN FAULT CODE 2

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

FAN ERROR CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

NO HEATING

CONTROLLER - USER INTERACTION

Next: End

NO HTG

CONTROLLER - USER INTERACTION

Next: End

FAILED GAS RATE

HEAT ENGINE FLUEWAYS

Next: End

FAN BEARING PLATE FAILURE 1

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CH DOES NOT RESPOND 2

Next: End

CH DOES NOT RESPOND

EBUS CONTROLS

Next: End

CH DOES NOT RESPOND 1

EBUS CONTROLS

Next: End

CH DOES NOT RESPOND 1

Next: End

BURNER IGNITION

INTERFACE - FLUE C/W SEAL

Next: End

BURNER IGNITION

INTERFACE - SUMP

Next: End

BURNER IGNITION

HEAT ENGINE FLUEWAYS

Next: End

BEARING PLATE FAILURE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

GAS VALVE FAULT

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BURNER DOES NOT IGNITE & EST

SET - ELECTRODES C/W SCREW & GASKET

Next: End

BURNER DOES NOT IGNITE & EST 2

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BURNER DOES NOT IGNITE & EST

INTERFACE - FLUE C/W SEAL

Next: End

BURNER DOES NOT IGNITE & EST

INTERFACE - SUMP

Next: End

BURNER DOES NOT IGNITE & EST

HEAT ENGINE FLUEWAYS

Next: End

FAN BEARING PLATE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

GAS VALVE FAULT 1

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

POOR HW RADS COOL

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

PUMP RUNS CONTINUOUSLY

FROST PROTECTION

Next: End

PUMP RUNS CONTINUOUSLY

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

LEDS DO NOT ILLUMINATE

CONTROLLER - USER INTERACTION

Next: End

FAN RUNS

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CH DOES NOT RESPOND 2

EBUS CONTROLS

Next: End

CH DOES NOT RESPOND

Next: End

CH DOES NOT RESPOND

CONTROLLER - USER INTERACTION

Next: End

NORMAL OPERATION

OVERHEAT

Next: End

OVERHEAT FAULT CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

OVERHEAT FAULT CODE

KIT - SENSOR

Next: End

STATUS CODE COMMS

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

BOILER NOISY

HEAT ENGINE FLUEWAYS

Next: End

FAN BEARING PLATE FAILURE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

GAS VALVE FAULT 4

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

CONTINUE TESTING

Z REDIRECTION

Next: End

POOR HW RADS COOL

HEAT EXCHANGER - PLATE C/W SEALS

Next: End

DHW RUNS HOT THEN COLD

HEAT EXCHANGER - PLATE C/W SEALS

Next: End

OVERHEAT

HEAT EXCHANGER - PLATE C/W SEALS

Next: End

SHORTED

SENSOR - FLOW - DHW

Next: End

DHW FLOW SENSOR ERROR CODE

COMBUSTION CONTROL UNIT INC PARAMETER UNIT

Next: End

SENSOR ERROR CODE

SENSOR - FLOW - DHW

Next: End

FAULT CODE

SET - CABLE

Next: End

FAULT CODE 2

SET - CABLE

Next: End

FAULT CODE SENSOR

ERROR CODE RESET

Next: End

FAN NOT RUNNING

SENSOR - FLOW - DHW

Next: End

CHIMNEY ILLUMINATED SOLID

CONTROLLER - USER INTERACTION

Next: End

FAULT CODE MISCELLANEOUS

ERROR CODE RESET

Next: End

STATUS CODE SHUT DWN

ERROR CODE RESET

Next: End

STATUS CODE SHUTDWN

CONTROLLER - USER INTERACTION

Next: End

STATUS CODE SHUTDWN

BL TERMINALS - LINK

Next: End

STATUS CODE SHUTDWN

Next: End

STATUS CODE COMS

ERROR CODE RESET

Next: End

STATUS CODE MISC

ERROR CODE RESET

Next: End

BOILER UPTO TEMP RADS COOL

Next: End

FAULT CODE OVERHEAT 3

PUMP C/W SEAL

Next: End

SYSTEM PRESSURE RISE EXCESSIVE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1289

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1293

TEMPERATURE RISE UNSATISFACTORY, RADIATORS REMAINS COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1295

TEMPERATURE RISE UNSATISFACTORY, RADIATORS HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1297

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1299

PUMP RUNS CONTINUOUSLY

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p2246

APPLIANCE FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p1335

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p2332

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p1481

APPLIANCE DOES NOT RESPOND TO A CH DEMAND

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p2337

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p1513

APPLIANCE DOES NOT RESPOND TO A HEATING DEMAND

CHARACTERISTIC TEST FROM TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p2353

FLUE INTERFACE RESTRICTED AND/OR BLOCKED

Next: !p1521

SUMP RESTRICTED AND/OR BLOCKED

Next: !p1523

FAN RUNS, BURNER IGNITES BUT IS BAFFLING AND/OR NOISY

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS, BURNER IGNITES AND ESTABLISHES

Next: p1639

FAN RUNS, BURNER DOES NOT IGNITE AND ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS, BURNER IGNITES AND ESTABLISHES

Next: p1578

FLUE INTERFACE RESTRICTED AND/OR BLOCKED

Next: !p1649

SUMP RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p1651

LEDS DO NOT ILLUMINATE

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p1678

FLUE INTERFACE RESTRICTED AND/OR BLOCKED

Next: !p1860

SUMP RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p1862

POOR ELECTRICAL CONNECTION BETWEEN FAN MOTOR AND PCB

CHARACTERISTIC TEST FROM OBSERVATION FAN ROTATION & RESISTANCE

Next: !p1878

HEAT EXCHANGER FLUEWAYS RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2009

FAN BEARING PLATE FAILURE

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2047

FAN RUNS

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS - FAULT CODE

Next: p2061

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS, BURNER IGNITES AND ESTABLISHES

Next: p2063

HEAT EXCHANGER FLUEWAYS RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2088

FAN BEARING PLATE FAILURE

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2090

24 VOLT EXTERNAL CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

Next: p2095

EBUS EXTERNAL CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

Next: p2094

24 VOLT EXTERNAL CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

Next: p2106

EBUS EXTERNAL CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

Next: p2103

FLUE INTERFACE RESTRICTED AND/OR BLOCKED

Next: !p2132

SUMP RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2134

HEAT EXCHANGER FLUEWAYS RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2140

FAN BEARING PLATE FAILURE

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2142

FLUE INTERFACE RESTRICTED AND/OR BLOCKED

Next: !p2159

SUMP RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2161

HEAT EXCHANGER FLUEWAYS RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2167

FAN BEARING PLATE FAILURE

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2169

24 VOLT EXTERNAL CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

Next: p2373

EBUS EXTERNAL CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

Next: p2375

APPLIANCE CONTINUES TO HEAT BEYOND 75 DEG

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: !p2388

APPLIANCE OVERHEATS BEFORE 75 DEG IS REACHED

CHARACTERISTIC TEST FROM OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: !p2390

HEAT EXCHANGER FLUEWAYS RESTRICTED AND/OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2433

FAN BEARING PLATE FAILURE

CHARACTERISTIC TEST FROM INSPECTION HEAT EXCHANGER FLUEWAYS

Next: !p2435

CHIMNEY SWEEP LED ILLUMINATED (SOLID RED OR GREEN)

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p2573

FAN PULSES

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS, BURNER IGNITES AND ESTABLISHES

Next: !p2032

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS, BURNER IGNITES AND ESTABLISHES

Next: p447

FAN SEIZED AND/OR ROTATION RESTRICTED

CHARACTERISTIC TEST FROM OBSERVATION FAN ROTATION & RESISTANCE

Next: !p2034

FAN RESISTANCE NOT AS EXPECTED

CHARACTERISTIC TEST FROM OBSERVATION FAN ROTATION & RESISTANCE

Next: !p2035

APPLIANCE AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1972

APPLIANCE UP TO TEMPERATURE, RADIATORS DO NOT HEAT SUFFICIENTLY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p550

NO CONNECTIONS PRESENT @ BL TERMINALS

CHARACTERISTIC TEST FROM INSPECTION BL TERMINALS - USER INTERFACE

Next: !p665

EXTERNAL WIRING CONNECTIONS PRESENT @ BL TERMINALS

CHARACTERISTIC TEST FROM INSPECTION BL TERMINALS - USER INTERFACE

Next: p667

ERROR / STATUS CODE (CHIMNEY SWEEP AND / OR RESET LED FLASHING RED OR GREEN)

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p1337

02/03/2020 12:04:35 2002_1_50_1 12/03/2020 14:01:13

05/03/2020 12:47:39

Next: End

INSPECTION DHW ISOLATION VALVE

Next: p1276, !f1277

ERROR CODES

Next: !p1342, !f1343

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: p1390, !f1391

VOLTAGE FLOW SENSOR - DEMAND

{GAINPCBACS}

Next: p1441, f1436

VOLTAGE FLOW SENSOR - SUPPLY

Next: p1437, f2516

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

THE TEMPERATURE CLAM

Next: p2476, ?1480, ?1482

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

THE TEMPERATURE CLAM

Next: p2473, ?1512, ?1514

INSPECTION CONDENSATE PIPE

Next: p1498, !f1499

VOLTAGE DIVERTER MOTOR AT PCB - DHW

{GAINPCBACS}

Next: !p1526, !f1527

VOLTAGE DIVERTER MOTOR AT PCB - CH

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX

Next: !p1538, !f1539

RESISTANCE MAINS SUPPLY FUSE

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p1681, f1682

FUSE FURTHER INVESTIGATION - MAINS

Next: !p1683, !f1684

FUSE FURTHER INVESTIGATION F1

Next: !p1687, !f1688

RESISTANCE SAFETY CIRCUIT AND HARNESS

REMOVE CONNECTOR X5 FROM THE PCB

Next: !p1727, f1728

RESISTANCE STAT OVERHEAT

GAIN ACCESS TO OVERHEAT STAT & DISCONNECT LEADS TO STAT

Next: !p1729, !f1730

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: !p1805, !f1806

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: !p1807, !f1808

INSPECTION DIVERTER VALVE - FUSE INVESTIGATION

REMOVE ELECTRICAL CO

Next: p1822, !f1823

INSPECTION CONDENSATE PIPE

Next: p2447, !f2470

INSPECTION PARAMETER UNIT

Next: p1886, !f2051

VOLTAGE RECTIFICATION AT PCB

{GAINPCBACS}

Next: p2146, f2147

DISCONNECT SPARK ELECTRODE AT SPARK GENERATOR

DISCONNECT SPARK ELECTRODE LEAD FROM SPARK GENERATOR

Next: !p2148, !f2149

INSPECTION AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p2152, !f2153

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: p2249, !f2250

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: p2370, !f2384

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

THE TEMPERATURE CLAM

Next: p2480, !f2481

DISCONNECT DHW FLOW SENSOR - ERROR CODE

REMOVE ELECTRICAL CONNECTOR FROM THE DHW FLOW SENSOR AND MAKE SAFE

Next: !p2486, f2487

RESISTANCE DHW FLOW SENSOR HARNESS

REMOVE THE AIR INTAKE
REMOVE THE CONNECTOR FROM THE DHW FLOW SENSOR

Next: !p2488, !f2489

DISCONNECT DHW FLOW SENSOR - ERROR CODE

REMOVE ELECTRICAL CONNECTOR FROM THE DHW FLOW SENSOR AND MAKE SAFE

Next: !p2502, f2503

RESISTANCE DHW FLOW SENSOR HARNESS

REMOVE THE AIR INTAKE
REMOVE THE CONNECTOR FROM THE DHW FLOW SENSOR

Next: p2504, !f2515

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: !p2507, !f2508

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: !p2511, !f2512

VOLTAGE FLOW SENSOR - SUPPLY - FLOW SENSOR DISCONNECTED

REMOVE ELECTRICAL CONNECTOR FROM THE DHW FLOW SENSOR AND MAKE SAFE

Next: !p2517, !f2518

OBSERVATION FAN RUNS - FAULT CODE

Next: !p2049, ?2060, ?2062

RESET APPLIANCE - ERROR / STATUS CODE DISPLAYED

Next: !p507, f508

INSPECTION PARAMETER UNIT

Next: p509, !f2052

RESET APPLIANCE - ERROR / STATUS CODE DISPLAYED

Next: !p660, f659

INSPECTION BL TERMINALS @ USER INTERFACE

GAIN ACCESS TO THE USER CONTROL INTERFACE PCB

Next: !p663, ?664, ?666

RESET APPLIANCE - ERROR / STATUS CODE DISPLAYED

Next: !p671, f672

INSPECTION WIRING HARNESS CONNECTIONS

GAIN ACCESS TO PCB

Next: p2394, !f2395

RESET APPLIANCE - ERROR / STATUS CODE DISPLAYED

Next: !p676, !f678

RESET APPLIANCE - OVERHEAT / TEMPERATURE PROTECTION

ENSURE APPLIANCE IS COOL

Next: p1697, f1726

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p927, !f1695

OBSERVATION COLD WATER SUPPLY

Next: p1278, !f1279

INSPECTION DHW CARTRIDGE RESTRICTOR

ISOLATE THE COLD WAT

Next: !p1280, !f1281

PRESSURE EXPANSION VESSEL

APPLIANCE PRIMARY CIRCUIT DRAINED AND DISCHARGED

Next: !p1290, !f1291

OBSERVATION HYDRAULIC PRESSURE

Next: p1469, !f1470

OBSERVATION HYDRAULIC PRESSURE

Next: p2187, !f1485

OBSERVATION DIVERTER VALVE MOTOR OPERATION - DHW

RELEASE THE SECURING

Next: !p1524, f1525

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: p1516, !f1517

TEMPERATURE FLOW - FROST PROTECTION

ATTACH A TEMPERATURE CLAMP TO THE FLOW PIPE

Next: !p1385, f1389

ERROR / STATUS OR DHW FLOW SENSOR ERROR CODE SELECTION

Next: p1338, f1341

STATUS CODES

Next: !p1339, !f1340

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: p1415, !f1423

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p1408, !f1409

OBSERVATION ISOLATE COLD MAINS SUPPLY

ISOLATE THE COLD MAINS SUPPLY

Next: p1425, !f1426

DISCONNECT DHW FLOW SENSOR

REMOVE ELECTRICAL CONNECTOR FROM THE DHW FLOW SENSOR AND MAKE SAFE

Next: !p1967, !f1968

RESISTANCE DHW FLOW SENSOR HARNESS

REMOVE THE AIR INTAKE
REMOVE THE CONNECTOR FROM THE DHW FLOW SENSOR

Next: !p1572, !f1573

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: p1442, !f1443

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: p1670, !f1675

RESISTANCE POTENTIOMETER - DHW TEMPERATURE

DISCONNECT HMI CABLE

Next: p2328, !f2331

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: p1471, !f1472

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: p1473, !f1474

PUMP LIMPET TEST

Next: p1475, !f1476

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH A TEMPERATURE

Next: !p1477, f1478

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: p1486, !f1487

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: p1488, !f1489

PUMP LIMPET TEST

Next: p1540, !f1569

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH A TEMPERATURE

Next: p1492, f1493

GAS RATE

Next: !p2244, f1495

INSPECTION AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p1500, !f1501

INSPECTION INTERFACE AND SUMP

Next: p1502, ?1520, ?1522

INSPECTION FLUE

Next: p1504, !f1505

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE THE COMBUSTION CONTROL UNIT AND GAIN
ACCESS TO THE HEAT EXCHANGER FLUEWAYS

Next: p1506, ?2087, ?2089

INSPECTION BURNER

Next: !p2044, !f2045

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: !p1518, !f1519

OBSERVATION DIVERTER VALVE MOTOR OPERATION - CH

Next: p1907, f1537

RESISTANCE POTENTIOMETER - DHW TEMPERATURE

DISCONNECT HMI CABLE

Next: p2519, !f2568

INSPECTION CONDENSATE PIPE

Next: p1579, !f1580

PRESSURE GAS INLET

SLIGHTLY DISENGAGE T

Next: p1581, !f1582

OBSERVATION BURNER HEARD TO IGNITE

Next: p2120, f2145

PRESSURE GAS INLET

SLIGHTLY DISENGAGE T

Next: p1640, !f1641

INSPECTION CONDENSATE PIPE

Next: p2399, !f2422

INSPECTION AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p2284, !f2292

INSPECTION INTERFACE AND SUMP

Next: p1646, ?1648, ?1650

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE THE COMBUSTION CONTROL UNIT AND GAIN
ACCESS TO THE HEAT EXCHANGER FLUEWAYS

Next: p2424, ?2432, ?2434

RESISTANCE STAT OVERHEAT

GAIN ACCESS TO OVERHEAT STAT & DISCONNECT LEADS TO STAT

Next: p1444, !f1674

VOLTAGE MAINS AT PCB

{GAINPCBACS}

Next: p1679, f1680

RESISTANCE FUSE PCB

REMOVE FUSE FROM THE PCB

Next: p1969, f1686

OBSERVATION HYDRAULIC PRESSURE

Next: p1732, !f1778

INSPECTION FLOW AND RETURN VALVES

Next: p1755, !f1779

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR X5 FROM THE PCB

Next: p1780, f1803

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE CONNECTOR X5 FROM THE PCB

Next: p898, f1804

RESISTANCE DIVERTER MOTOR AND HARNESS - FUSE INVESTIGATION

REMOVE CONNECTOR X3 FROM THE PCB

Next: p1824, !f1825

RESISTANCE PUMP - FUSE INVESTIGATION

REMOVE PUMP COVER AND DISCONNECT ELECTRICAL CONNECTIONS

Next: p1826, !f1831

RESISTANCE FAN ASSEMBLY

GAIN ACCESS TO PCB
REMOVE FAN DRIVER PCB FROM THE FAN ASSEMBLY

Next: p1827, !f2056

RESISTANCE GAS VALVE - FUSE FURTHER INVESTIGATION

REMOVE ELECTRICAL CONNECTOR FROM THE GAS VALVE

Next: !p1829, !f2055

INSPECTION COMBUSTION CIRCUIT SEALS

Next: p1853, !f1854

INSPECTION AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p1855, !f1856

INSPECTION INTERFACE AND SUMP

Next: p2004, ?1859, ?1861

RESISTANCE HARNESS PARAMETER UNIT

REMOVE AIR INTAKE
REMOVE ELECTRICAL CONNECTOR TO PARAMETER UNIT

Next: p1888, !f1889

RESET APPLIANCE - ERROR / STATUS CODE DISPLAYED

Next: !p1890, !f2050

INSPECTION DIVERTER VALVE BODY

RELEASE THE SECURING

Next: p807, !f1913

OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

GAIN ACCESS TO CONTROLLER INTERFACE PCB

Next: p1933, ?2100, ?2102

OBSERVATION IS WIRING CORRECT / LINK PRESENT AT 'OT' TERMINALS

GAIN ACCESS TO CONTROLLER INTERFACE PCB

Next: p1942, !f1961

VOLTAGE AT 'ENABLE' TERMINALS

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX

Next: !p2074, !f2075

OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

GAIN ACCESS TO CONTROLLER INTERFACE PCB

Next: p1947, ?2091, ?2093

OBSERVATION IS WIRING CORRECT / LINK PRESENT AT 'OT' TERMINALS

GAIN ACCESS TO CONTROLLER INTERFACE PCB

Next: p1956, !f1963

VOLTAGE AT 'ENABLE' TERMINALS

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX

Next: !p2076, !f2077

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: p2257, !f2260

RESISTANCE THERMISTOR FLOW

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE FLOW THERMISTOR ELECTRICAL CONNECTOR

Next: p1973, !f1974

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: p1975, !f1976

RESISTANCE POTENTIOMETER - CH TEMPERATURE

DISCONNECT HMI CABLE

Next: !p1977, !f1978

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE THE COMBUSTION CONTROL UNIT AND GAIN
ACCESS TO THE HEAT EXCHANGER FLUEWAYS

Next: p2005, ?2008, ?2010

INSPECTION BURNER

Next: p2441, !f2446

OBSERVATION FAN FAULT CODE OCCURS

Next: !p2064, !f2065

OBSERVATION ELECTRICAL CONNECTIONS BETWEEN FAN MOTOR AND PCB

GAIN ACCESS TO PCB
REMOVE FAN DRIVER PCB FROM THE FAN ASSEMBLY

Next: !p2069, !f2070

DISCONNECT EBUS CONTROLS

DISCONNECT EBUS WIRING AND MAKE SAFE

Next: !p2098, !f2099

BYPASS EXTERNAL CONTROLS 24V

DISCONNECT 24V EXTER

Next: !p2096, !f2097

DISCONNECT EBUS CONTROLS

DISCONNECT EBUS WIRING AND MAKE SAFE

Next: !p2104, !f2105

BYPASS EXTERNAL CONTROLS 24V

DISCONNECT 24V EXTER

Next: !p2107, !f2108

VOLTAGE GAS VALVE

Next: p2121, !f2122

INSPECTION AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p2123, !f2124

OBSERVATION SPARK GENERATOR

GAIN ACCESS TO THE PCB
REMOVE SPARK IGNITION LEAD FROM THE SPARK GENERATOR AND MAKE SAFE

Next: p2125, !f2126

INSPECTION FLUE

Next: p2127, !f2128

INSPECTION INTERFACE AND SUMP

Next: p2129, ?2131, ?2133

INSPECTION ELECTRODE IGNITION

REMOVE SPARK ELECTRODE ASSEMBLY FROM THE APPLIANCE

Next: p2135, !f2136

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE THE COMBUSTION CONTROL UNIT AND GAIN
ACCESS TO THE HEAT EXCHANGER FLUEWAYS

Next: p2137, ?2139, ?2141

INSPECTION BURNER

Next: !p2143, !f2144

VOLTAGE RECTIFICATION AT PCB - IGNITION

{GAINPCBACS}

Next: !p2150, f2151

INSPECTION FLUE

Next: p2154, !f2155

INSPECTION INTERFACE AND SUMP

Next: p2156, ?2158, ?2160

INSPECTION ELECTRODE IGNITION

REMOVE SPARK ELECTRODE ASSEMBLY FROM THE APPLIANCE

Next: p2162, !f2163

INSPECTION HEAT EXCHANGER FLUEWAYS

REMOVE THE COMBUSTION CONTROL UNIT AND GAIN
ACCESS TO THE HEAT EXCHANGER FLUEWAYS

Next: p2164, ?2166, ?2168

INSPECTION BURNER

Next: !p2170, !f2171

INSPECTION EXTERNAL BYPASS

Next: p902, !f2186

TEMPERATURE COMPARISON OF HOT WATER - EXTERNAL MIXING

Next: p1484, !f2241

TEMPERATURE FLOW

ATTACH A TEMPERATURE CLAMP TO THE FLOW PIPE

Next: !p2247, f2248

RESISTANCE THERMISTOR RETURN

REMOVE THE AIR INTAKE AND FLUE INTERFACE
REMOVE RETURN THERMISTOR ELECTRICAL CONNECTOR

Next: p2253, !f2254

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: !p2255, !f2256

OBSERVATION DIVERTER MOTOR SPINDLE DURING PUMP PURGE

RELEASE THE SECURING

Next: !p2261, !f2262

INSPECTION FLUE

Next: p1644, !f2305

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: !p2329, !f2330

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: p1407, !f2336

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: p1946, !f2352

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: p1932, !f2368

OBSERVATION WHICH TYPE OF EXTERNAL CONTROLS ARE FITTED

GAIN ACCESS TO CONTROLLER INTERFACE PCB

Next: p2371, ?2372, ?2374

OBSERVATION IS WIRING CORRECT / LINK PRESENT AT 'OT' TERMINALS

GAIN ACCESS TO CONTROLLER INTERFACE PCB

Next: p2380, !f2381

BYPASS EXTERNAL CONTROLS 24V

DISCONNECT 24V EXTER

Next: !p2378, !f2379

DISCONNECT EBUS CONTROLS

DISCONNECT EBUS WIRING AND MAKE SAFE

Next: !p2376, !f2377

VOLTAGE AT 'ENABLE' TERMINALS

{GAINPCBACS}
CH TEMPERATURE CONTROL SET TO MAX

Next: !p2382, !f2383

OBSERVATION DOES OVERHEAT OCCUR AT MAX TEMPERATURE

Next: !p2386, ?2387, ?2389

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: !p2396, !f2397

INSPECTION COMBUSTION CIRCUIT SEALS

Next: p1642, !f2421

INSPECTION BURNER

Next: !p2438, !f2439

OBSERVATION CAN COMBUSTION VALUES BE ADJUSTED

CONNECT FGA TO THE COMBUSTION TEST POINT

Next: p2442, !f2443

COMBUSTION VALUES CORRECTLY ADJUSTED

THE COMBUSTION READI

Next: !p2444, !f2472

INSPECTION FLUE

Next: p1851, !f2471

INSPECTION FILTER

APPLIANCE DRAINED AN

Next: !p2474, !f2475

INSPECTION FILTER

APPLIANCE DRAINED AN

Next: !p2477, !f2478

INSPECTION FILTER

APPLIANCE DRAINED AN

Next: !p2482, !f2483

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR X5 FROM THE PCB

Next: p2505, f2506

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE CONNECTOR X5 FROM THE PCB

Next: p2509, f2510

RESET APPLIANCE - ERROR CODE

Next: !p2513, !f2514

RESISTANCE HMI CABLE

DISCONNECT HMI CABLE FROM CONTROLLER INTERFACE PCB AND THE MAIN PCB

Next: p1490, !f2569

INSPECTION BUTTON STUCK IN

Next: !p2574, !f2575

OBSERVATION FAN ROTATION & RESISTANCE

GAIN ACCESS TO PCB
REMOVE FAN DRIVER PCB FROM THE FAN ASSEMBLY

Next: p448, ?449, ?451, ?1877

VOLTAGE FAN

{GAINPCBACS}
REMOVE FAN DRIVER PCB FROM THE FAN ASSEMBLY & MAKE SAFE

Next: !p2033, f1434

INSPECTION WIRING HARNESS CONNECTIONS

GAIN ACCESS TO PCB

Next: !p2053, !f2398

INSPECTION FLOW AND RETURN VALVES

Next: p1530, !f1536

DISCONNECT EXTERNAL BL CONNECTIONS

REMOVE EXTERNAL CONN

Next: !p668, !f669

PUMP LIMPET TEST

Next: p808, !f809

INSPECTION EXTERNAL BYPASS

Next: !p810, !f811

OBSERVATION PUMP PULSES DURING PURGE

Next: p899, f926

PUMP LIMPET TEST

Next: p900, !f901

OBSERVATION PUMP OVERRUN

Next: p2172, !f1809

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH A TEMPERATURE

Next: p2385, f2391

System Information

  • Total Tests: 496
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control