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:

VAILLANT ECOTEC PLUS SYSTEM

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

VAILLANT ECOTEC PLUS SYSTEM

Next: &4, !f3

TYPE OF DIAGNOSTIC PROCEDURE

Next: &1226, !f5

BURNER IGNITES AND ESTABLISHES

{CHTEMPCONTMAX}

Next: &432, ?301, ?303, ?307, ?402, ?2026, ?2283

CH OPERATION

{CHTEMPCONTMAX}
FLOW AND RETURN VALVES FULLY OPEN
ON/OFF SWITCH ON

Next: &825, ?465, ?481, ?495, ?504, ?700, ?717

PUMP OVERRUN

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: &769, f760

BOILER ANTI-CYCLE DELAY

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: &nff, f771

PUMP RUNS

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: &1118, ?863, ?1020

DHW DEMAND

ON/OFF SWITCH ON

Next: &730, !f824

CH MODULATION

Next: &1139, f826

FURTHER INVESTIGATION FUSE

INTENTIONALLY BLANK HEADER FOR FUSE INVESTIGATION

Next: &nff, f964

F0-F10 FAULT CODE/ FLOW THERMISTOR

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: &nff, f1536

F1-F11 FAULT CODE/ RETURN THERMISTOR

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: &nff, f1550

F67 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1557

F70 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1081

FAN RUNS

{CHTEMPCONTMAX}
ON/OFF SWITCH ON
ENSURE APPLIANCE IS COOL

Next: &300, f1337

BOILER ON, NO DEMAND (ANTI-FROST PROTECTION)

ON/OFF SWITCH ON
ENSURE ALL EXTERNAL CONTROLS ARE OFF

Next: &823, f1140

ENHANCED FAULT CODES

Next: &1234, f1227

POWER UP

NO DEMANDS

Next: &1329, f1235

FAN RUNS CONTINUOUSLY

{CHTEMPCONTMAX}
ENSURE NO EXTERNAL DEMAND
ON/OFF SWITCH ON

Next: &2065, f1401

F49 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1565

F76 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1628

F75 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1671

F63 F65 F67 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1813

INFORMATION D34 FAN SPEED

TO ACCESS PARAMETER

Next: &nff, !f1840

F25 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1843

F32 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1847

F72 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f1888

F61 AND F62 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f2015

FURTHER INVESTIGATION PCB

INTENTIONALLY BLANK HEADER FOR PCB INVESTIGATION

Next: &nff, f2054

CH DEMAND

{CHTEMPCONTMAX}

Next: &786, f2066

F22 / F73 / F74 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f2115

F77 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f2232

CON FAULT

INTENTIONALLY BLANK HEADER FOR CON FAULT

Next: &nff, f2260

BOILER NOISY

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

BOILER NOISY

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

SYS TEMP RESTART

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

SYS TEMP RESTART

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

CH MODULATION

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

CH MODULATION

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

PUMP OVERRUN

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

PUMP OVERRUN

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

ANTI-CYCLE DELAY

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

ANTI-CYCLE DELAY

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

BOILER NOISY

SYSTEM PRESSURE

Next: End

FAULT CODE DUM

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLOWN STAND BY MODE AT POWER UP

MAIN FUSE FUSED SPUR F1

Next: End

FAN VOLTAGE

PCB

Next: End

FAN RUNS CH DEMAND

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FAN RUNS

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FAN CONTROL

HARNESS X20

Next: End

BURNER DOES NOT ESTABLISH

BURNER

Next: End

BURNER DOES NOT ESTABLISH

HEAT EXCHANGER

Next: End

BURNER DOES NOT ESTABLISH

FLUE

Next: End

BURNER BAFFLES OUT

BURNER

Next: End

BURNER BAFFLES OUT

HEAT EXCHANGER

Next: End

BURNER BAFFLES OUT

FLUE

Next: End

RANS NO DEMAND

HARNESS X20

Next: End

FAN RUNS NO DEMAND 1

PCB

Next: End

SPARKING ABSENT

CABLE - IGNITION

Next: End

GREATER THAN -4MBAR

INLET - AIR DUCT

Next: End

BLOCKED

TRAP - SIPHONIC CONDENSATE

Next: End

CHOKED

BURNER

Next: End

BURNER DOES NOT IGNITE

HEAT EXCHANGER

Next: End

BOILER TEMP LOW SYS LOW

GAS SUPPLY

Next: End

GAS RATE

INLET - AIR DUCT

Next: End

GAS RATE

TRAP - SIPHONIC CONDENSATE

Next: End

GAS RATE

BURNER

Next: End

GAS RATE

HEAT EXCHANGER

Next: End

BOILER TEMP LOW SYS LOW

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

BOILER TEMP LOW SYS LOW

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

COOL BEFORE REFIRE

BY - PASS

Next: End

COOL BEFORE REFIRE1

BY - PASS

Next: End

COOL BEFORE REFIRE2

BY - PASS

Next: End

COOL BEFORE REFIRE3

BY - PASS

Next: End

TEMP BELOW 5 DEGREE

ANTI-FROST ACTIVATED

Next: End

ANTIFROST

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

ANTI FROST

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FURTHER INVESTIGATION FUSE F1

PUMP

Next: End

F1/F10 FAULT CODE

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

F11/13 FAULT CODE

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

F67 FAULT CODE

PCB

Next: End

BAFFLES OUT

INLET - AIR DUCT

Next: End

DOES NOT ESTABLISH

INLET - AIR DUCT

Next: End

HARNESS OVERHEAT1

HARNESS X20

Next: End

F76

OVERHEAT

Next: End

OVERHEAT

SYSTEM PRESSURE

Next: End

OVERHEAT3

PUMP

Next: End

SYS TEMP3

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

SYS TEMP3

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

OVERHEAT3

PCB

Next: End

HARNESS OVERHEAT3

HARNESS X20

Next: End

OVERHEAT

Z DIRECTION CHOICE OR CONTINUE

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE

SYSTEM PRESSURE

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE

PCB

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE

HARNESS X2

Next: End

F63 F65 F67 FAULT CODE

PCB

Next: End

INFORMATION D34 FAN SPEED

Z DIRECTION CHOICE OR CONTINUE

Next: End

F25 FAULT CODE

OVERHEAT STAT

Next: End

F32 FAULT CODE FAN - SPEED CONTROL

HARNESS X20

Next: End

F32 FAULT CODE FAN RUNS - SPEED CONTROL

FAN

Next: End

F32 FAULT CODE FAN DOES NOT RUN HARNESS FAN

HARNESS X20

Next: End

F32 FAULT CODE FAN PERMANENT VOLTAGE

PCB

Next: End

F32 FAULT CODE - NO DEMAND VOLTAGE TO FAN

PCB

Next: End

FAULT CODE 32

Z DIRECTION CHOICE OR CONTINUE

Next: End

F32 FAULT CODE - FAN HALL SENSOR

HARNESS X20

Next: End

F32 FAULT CODE - FAN HALL SENSOR

FAN

Next: End

F72 FAULT CODE

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

F72 FAULT CODE

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

NO IGNITION

OVERHEAT STAT

Next: End

BURNER DOES NOT LIGHT - FAN HALL SENSOR

HARNESS X20

Next: End

BURNER DOES NOT LIGHT - FAN HALL SENSOR

FAN

Next: End

PUMP DOES NOT RUN 1

PCB

Next: End

BOILER TEMP LOW SYS LOWCIRCULATION ISSUE

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

BOILER TEMP LOW SYS LOWCIRCULATION ISSUE

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

PUMP

Next: End

BOILER TEMP LOW SYSTEM TEMP LOW

SYSTEM PRESSURE

Next: End

CIRCULATION ISSUE SYSTEM TEMP LOW

FLOW AND RETURN HOSE

Next: End

HARNESS OVERHEAT 2

HARNESS X20

Next: End

F62 GAS VALVE

VALVE GAS

Next: End

F62 - NOT SHUTTING DOWN

VALVE GAS

Next: End

F62 GAS VALVE AT IGNITION

VALVE GAS

Next: End

F62 - NOT SHUTTING DOWN AT IGNITION

VALVE GAS

Next: End

T2 FUSE FAILED

FUSE T2 (APPLIANCE PCB)

Next: End

FAULTY

PCB

Next: End

SHORTED

HARNESS X2

Next: End

NO DISPLAY

PCB

Next: End

OPEN OR SHORT CIRCUITFURTHER INVESTIGATION PCB FAIL

VALVE GAS

Next: End

FURTHER INVESTIGATION PCB FAIL

PUMP

Next: End

FURTHER INVESTIGATION PCB FAIL

FAN

Next: End

NOT RESPONDING TO CH DEMAND

PCB

Next: End

24 VOLT INPUT

PCB

Next: End

CH DEMAND 24

Next: End

EXTERNAL CONTROLS INPUT 240

Next: End

CH DEMAND 240

Next: End

PUMP

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

PUMP

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

PUMP DOES NOT RUN

SYSTEM PRESSURE

Next: End

VOLTAGE PRESSURE SENSOR

PCB

Next: End

PUMP RUNS

HARNESS X2

Next: End

PUMP DOES NOT RUN

HARNESS X20

Next: End

EBUS ERROR

PCB

Next: End

EBUS ERROR 2

PCB

Next: End

F22 / F74 / F74 FAULT CODE

SYSTEM PRESSURE

Next: End

F22 / F73 / F74 FAULT CODE 2

PCB

Next: End

F22 / F73 / F74

HARNESS X2

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE

PUMP

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE

AIR VENT - AUTOMATIC

Next: End

F75

FLOW AND RETURN HOSE

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE

EXPANSION VESSEL

Next: End

VOLTAGE AT PUMP F75 FAULT CODE

PCB

Next: End

PUMP DOES NOT RUN 1F75 FAULT CODE

PCB

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE INTERMITTENT

SYSTEM PRESSURE

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE INTERMITTENT

PCB

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE INTERMITTENT

HARNESS X2

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE INTERMITTENT

PUMP

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE INTERMITTENT

AIR VENT - AUTOMATIC

Next: End

F75 INTERMITTENT

FILTER PRIMARY CIRCUIT

Next: End

F75 INTERMITTENT

FLOW AND RETURN HOSE

Next: End

PUMP PULSES ON-OFF 75 FAULT CODE INTERMITTENT

EXPANSION VESSEL

Next: End

F75 FAULT CODE

FILTER PRIMARY CIRCUIT

Next: End

PUMP PULSES ON-OFF

SYSTEM PRESSURE

Next: End

PUMP PULSES ON_OFF

PCB

Next: End

PUMP PULSES ON_OFF

HARNESS X2

Next: End

PULSES ON_OFF

PUMP

Next: End

PUMP PULSES ON-OFF

AIR VENT - AUTOMATIC

Next: End

PUMP PULSES ON-OFF

FILTER PRIMARY CIRCUIT

Next: End

PUMP RUNS

FLOW AND RETURN HOSE

Next: End

PUMP PULSES ON_OFF

EXPANSION VESSEL

Next: End

RESTRICTED / BLOCKED

FILTER PRIMARY CIRCUIT

Next: End

GAS RATE1

INLET - AIR DUCT

Next: End

GAS RATE1

TRAP - SIPHONIC CONDENSATE

Next: End

GAS RATE1

BURNER

Next: End

GAS RATE1

HEAT EXCHANGER

Next: End

CH NOISY

FLOW AND RETURN HOSE

Next: End

RESTRICTED / BLOCKED 2

FILTER PRIMARY CIRCUIT

Next: End

UNABLE TO GAS RATE

BY - PASS

Next: End

RESTRICTED / BLOCKED

FLOW AND RETURN HOSE

Next: End

RESTRICTED / BLOCKED 3

FILTER PRIMARY CIRCUIT

Next: End

RESTRICTED / BLOCKED 2

FLOW AND RETURN HOSE

Next: End

F77 FAULT CODE

CONDENSATE PUMP (VAILLANT)

Next: End

WITH CONDENSATE PUMPSPARKING ABSENT

CABLE - IGNITION

Next: End

WITH CONDENSATE PUMPBURNER DOES NOT LIGHT - FAN HALL SENSOR

HARNESS X20

Next: End

WITH CONDENSATE PUMPBURNER DOES NOT LIGHT - FAN HALL SENSOR

FAN

Next: End

CON FAULT - DEFINITELY PCB

PCB

Next: End

BLOCKED

FLUE

Next: End

F76

CIRCULATION ISSUE

Next: End

FAULT CODE F70

ADJUSTMENT DIAGNOSTIC CODE

Next: End

FAULT CODE F70

PCB

Next: End

F61/F62 VOLTAGE ISSUES OR CORRUPT RECTIFICATION

PCB

Next: End

LOW CAUSING POOR IGNITION

GAS SUPPLY

Next: End

RESTRICTED OR BLOCKED AFFECTING IGNITION

TRAP - SIPHONIC CONDENSATE

Next: End

CAUSING POOR SPARK

CABLE - IGNITION

Next: End

WARPED CAUSING POOR IGNITION

ELECTRODE - IGNITION AND MONITORING

Next: End

SPLIT OR BLOCKED CAUSING POOR IGNITION

BURNER

Next: End

CASE REMOVAL

Z DIRECTION CHOICE OR CONTINUE

Next: End

SPARKING NO IGNITION

GAS SUPPLY

Next: End

SPARKING NO IGNITION

ELECTRODE - IGNITION AND MONITORING

Next: End

ELECTRICAL

VALVE GAS

Next: End

BURNER DOES NOT ESTABLISH

GAS SUPPLY

Next: End

BURNER DOES NOT ESTABLISH

TRAP - SIPHONIC CONDENSATE

Next: End

BURNER DOES NOT ESTABLISH

CABLE - IGNITION

Next: End

BURNER DOES NOT ESTABLISH

ELECTRODE - IGNITION AND MONITORING

Next: End

BURNER BAFFLES OUT

GAS SUPPLY

Next: End

BURNER BAFFLES OUT

TRAP - SIPHONIC CONDENSATE

Next: End

UNDER PRESSURE

EXPANSION VESSEL

Next: End

FOR TYPE DIAG PROCEDURE

Z DIRECTION CHOICE OR CONTINUE

Next: End

BOILER TO TEMP RADS COOL

PUMP

Next: End

BOILR SHUTS DOWN PREMATURELY CHOPERATION

PUMP

Next: End

BOILER NOISY

GAS VALVE ADJUSTMENT

Next: End

CH OPERATION FAILURE TO REFIRE

Next: End

ANTI-CYCLE DELAY

Next: End

DHW DEMAND

Next: End

OPEN OR SHORT CIRCUITFURTHER INVESTIGATION FUSE F1

VALVE GAS

Next: End

FURTHER INVESTIGATION FUSE F1

FAN

Next: End

FAULT CODES DUM

Z DIRECTION CHOICE OR CONTINUE

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION F1

Z DIRECTION CHOICE OR CONTINUE

Next: End

SENSOR PRIMARY FAN RUNS

HARNESS X20

Next: End

FAN RUN CH DEMAND

PCB

Next: End

SENSOR TEMP RETURN FAN RUNS

HARNESS X20

Next: End

CONTROL VOLTAGE

FAN

Next: End

BURNER DOES NOT ESTABLISH

PCB

Next: End

BURNER BAFFLES OUT

VALVE GAS

Next: End

RUNS NO DEMAND

FAN

Next: End

GAS RATE

VALVE GAS

Next: End

GAS RATE

FLUE

Next: End

BOILER TEMP LOW SYS LOW

PCB

Next: End

COOL BEFORE REFIRE

Next: End

COOL BEFORE REFIRE1

Next: End

COOL BEFORE REFIRE2

Next: End

CH MODULATION

PCB

Next: End

COOL BEFORE REFIRE3

Next: End

BOILER ON- NO DEMAND

Next: End

ANTI FROST

PCB

Next: End

F1/F2 FAULT CODES

PCB

Next: End

SENSOR PRIMARY F1/F10 FAULT CODE

HARNESS X20

Next: End

F1-F10 RETEST BOILER

Z DIRECTION CHOICE OR CONTINUE

Next: End

F11/F13 FAULT CODE

PCB

Next: End

SENSOR TEMP RETURN F11/13 FAULT CODE

HARNESS X20

Next: End

F11-13 RETEST BOILER

Z DIRECTION CHOICE OR CONTINUE

Next: End

F67 RETEST BOILER

Z DIRECTION CHOICE OR CONTINUE

Next: End

F70 RETEST BOILER

Z DIRECTION CHOICE OR CONTINUE

Next: End

F49 RETEST BOILER

Z DIRECTION CHOICE OR CONTINUE

Next: End

GREATER THAN 5MB

VALVE GAS

Next: End

SPARKING OCCURS

ELECTRODE - IGNITION AND MONITORING

Next: End

OVERHEAT STAT OK1

PCB

Next: End

OVERHEAT1

OVERHEAT STAT

Next: End

OVERHEAT STAT OK3

PCB

Next: End

OVERHEAT3

OVERHEAT STAT

Next: End

OVERHEAT 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

PUMP PULSES ON-OFFF75 FAULT CODE

SENSOR - WATER PRESSURE

Next: End

BLANK FOR RETEST BOILER

Z DIRECTION CHOICE OR CONTINUE

Next: End

F25 FAULT CODE

PCB

Next: End

F32 FAULT CODE FAN SPEED CONTROL

PCB

Next: End

F32 FAULT CODE FAN DOES NOT RUN

FAN

Next: End

F32 FAULT CODE - HALL SENSOR

PCB

Next: End

PRIMARY SENSOR F72 FAULT CODE

HARNESS X20

Next: End

F72 FAULT CODE

PCB

Next: End

RETURN SENSOR F72 FAULT CODE

HARNESS X20

Next: End

SPARK NO IGNITION

PCB

Next: End

BURNER DOES NOT LIGHT - HALL SENSOR

PCB

Next: End

PUMP RUNS

PUMP

Next: End

SYSTEM COOL BOILER COOL

CIRCULATION ISSUE

Next: End

F62 FAULT CODE

OVERHEAT STAT

Next: End

F62 FAULT CODE

HARNESS X20

Next: End

F62 FAULT CODE AT IGNITION

HARNESS X20

Next: End

F61/F62 VOLTAGE ISSUES OR CORRUPT RECTIFICATION AT IGNITION

PCB

Next: End

T2 FUSE FAILED

Z DIRECTION CHOICE OR CONTINUE

Next: End

PCB FURTHER INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK DISPLAY

SENSOR - WATER PRESSURE

Next: End

FAULTY

DISPLAY PCB

Next: End

FUSE BLOWN

PCB FUSE BLOWN

Next: End

FURTHER INVESTIGATION MAIN SOLENOIDPCB FAIL

HARNESS X20

Next: End

FURTHER INVESTIGATION

PCB

Next: End

FURTHER INVESTIGATION PCB FAIL

HARNESS X20

Next: End

CH DEMAND

TIME SWITCH

Next: End

PREVENTING HEATING OPERATION

EBUS CONTROLS

Next: End

24 VOLT CONTROL RETURN

PCB

Next: End

EXTERNAL CONTROLS RETURN 240

Next: End

SENSOR PRIMARY PUMP

HARNESS X20

Next: End

SENSOR TEMP RETURN PUMP

HARNESS X20

Next: End

SENSOR

SENSOR - WATER PRESSURE

Next: End

PUMP DOES NOT RUN

PCB

Next: End

PUMP DOES NOT RUN

OVERHEAT STAT

Next: End

FAULT CODE

EBUS CONTROLS

Next: End

F22 / F73 / F74 FAULT CODE

PCB

Next: End

F22 / F73 / F74 FAULT CODE

SENSOR - WATER PRESSURE

Next: End

F75 FAULT CODE

SENSOR - WATER PRESSURE

Next: End

PUMP RUNSF75 FAULT CODE

PUMP

Next: End

PUMP PULSING F75 INTERMITTENT

SENSOR - WATER PRESSURE

Next: End

INTERMITTENT FAULT

SENSOR - WATER PRESSURE

Next: End

PUMP PULSES ON_OFF

SENSOR - WATER PRESSURE

Next: End

PUMP PULSING F75 (2)

SENSOR - WATER PRESSURE

Next: End

GAS RATE1

VALVE GAS

Next: End

GAS RATE1

FLUE

Next: End

CH OPERATION NOISY

HEAT EXCHANGER

Next: End

CIRCULATION ISSUES

Next: End

RESTRICTED / BLOCKED

HEAT EXCHANGER

Next: End

CH OPERATION BOILER UP TO TEMP RADS COLD

Next: End

F77 FOR NO REASON

PCB

Next: End

F77 FAULT CODE 2

PCB

Next: End

PREVENTING SPARK

CONDENSATE PUMP (VAILLANT)

Next: End

WITH CONDENSATE PUMPSPARKING OCCURS

ELECTRODE - IGNITION AND MONITORING

Next: End

WITH CONDENSATE PUMPBURNER DOES NOT LIGHT - HALL SENSOR

PCB

Next: End

CON FAULT

PCB - CON FAULT

Next: End

SPARKING NO IGNITION ZERO PRESSURE

FAN

Next: End

FAULT CODE F70

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE F70

FACTORY RESET

Next: End

F61 / F62 RETEST APPLIANCE

Z DIRECTION CHOICE OR CONTINUE

Next: End

WEAK SPARK

PCB

Next: End

WRONG MIX CAUSING POOR IGNITION

VALVE GAS

Next: End

BLOCKED OR DAMAGED

BURNER

Next: End

SPARK NO IGNITION

VALVE GAS

Next: End

SPARK NO IGNITION

HARNESS X20

Next: End

EXPANSION CONNECTION

TUBE - CONNECTION

Next: End

POTENTIOMETER TEMP CONTROL CH OP BOILER NOISY 2

PCB

Next: End

CH OPERATION NOISEY

Next: End

OPERATION CH TOO LONG FOR REFIRECIRCULATION

Next: End

SYS TEMP RESTART

PCB

Next: End

PUMP OVERRUN

PCB

Next: End

ANTI-CYCLE DELAY

Next: End

ANTI-CYCLE DELAY

PCB

Next: End

FURTHER INVESTIGATION FUSE F1 MAIN SOLENOID

HARNESS X20

Next: End

FURTHER INVESTIGATION FUSE F1

HARNESS X20

Next: End

DOES NOT RUN

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p1284

PRESSURE GREATER THAN -5.0MBAR ( E.G - 5.5MB)

CHARACTERISTIC TEST FROM FAN PRESSURE TEST

Next: p1432

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM FAN RUNS F32

Next: p1850

FAN RUNS CONTINUOUSLY

CHARACTERISTIC TEST FROM FAN RUNS F32

Next: p1852

F61 OR F62 SHOWN AFTER DEMAND

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p2027

24 VOLT CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED?

Next: p2071

EBUS CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED?

Next: p2073

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP BEHAVIOUR F75

Next: p2145

PUMP RUNS OR F75 OCCURING INTERMITTENTLY

CHARACTERISTIC TEST FROM OBSERVATION PUMP BEHAVIOUR F75

Next: p2150

GAS RATE INCORRECT

Next: p2202

APPLIANCE MODULATES BEFORE GAS RATE CAN BE TAKEN

Next: p2201

BURNER IGNITES BUT IGNITION POOR ((HEAVY/DELAYED/EXPLOSIVE/SLOW)

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p2284

SPARKING OCCURS BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p316

FAN RUNS SPARKING DOES NOT OCCUR

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p2237

BURNER IGNITES BUT BAFFLES OUT OR LIFTS OFF

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p419

ZERO PRESSURE MEASURED

CHARACTERISTIC TEST FROM FAN PRESSURE TEST

Next: p1435

PRESSURE STAYS AT -4.5MBAR

CHARACTERISTIC TEST FROM FAN PRESSURE TEST

Next: p324

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM BURNER IGNITES AND ESTABLISHES

Next: p404

BOILER NOISY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p669

BOILER UP TO TEMP RADS COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p499

SYSTEM PRESSURE RISE EXCESSIVE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p496

BOILER TEMP LOW SYSTEM TEMP LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1923

TEMPERATURE DIFFERENTIAL INCORRECT OR LOCAL BOILING

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

Next: p1992

DIFFERENTIAL OK SYSTEM NOISE

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

Next: !p699

OPERATION SATISFACTORY, BUT GETS TOO COOL BEFORE REFIRING

CHARACTERISTIC TEST FROM CH OPERATION

Next: p702

CH OPERATION OK, GOES TO OVERHEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1666

PUMP PULSES ON-OFF_THEN LOCK OUT F75

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p2176

17/08/2021 13:06:31 2108_1_50_1 23/09/2021 09:24:49

20/08/2021 14:58:00

Next: End

LOCKOUT RESET F 70

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: !p1560, f2273

EXTERNAL CONTROLS (NO DEMAND)

NO DEMANDS
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: !p1524, f1525

ENHANCED FAULT CODES

Next: !p1228, !f1229

VOLTAGE MAINS POWER INPUT TO APPLIANCE

REMOVE CONTROL BOX COVER

Next: p2034, f1237

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p1238, f1239

FUSE FURTHER INVESTIGATION FUSED SPUR

Next: !p1240, !f1241

VOLTAGE FAN PCB

{CHTEMPCONTMAX}
D

Next: p1338, !f1339

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1342, f1343

RESISTANCE SENSOR TEMP PRIMARY

REMOVE THE RED AND BLACK LEADS FROM PRIMARY SENSOR

Next: !p1344, !f1345

RESISTANCE SENSOR TEMP RETURN

REMOVE BLUE AND BLACK LEADS FROM RETURN SENSOR

Next: !p1348, !f1349

VOLTAGE FAN (RUNS CONTINUOUSLY)

DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY
(PLACE IN A SAFE POSITION)
ON/OFF SWITCH ON

Next: p1415, !f1418

SPARK ELECTRODE LEAD

DISCONNECT FLAME SENSE FROM ELECTRODE
DISCONNECT CONNECTER FROM THE SPARK GENERATOR

Next: p1913, !f1423

FAN TEST PRESSURE

{CHTEMPCONTMAX}
ATTACH PRESSURE GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: !p1491, f1492

AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p1493, !f1494

AUTO BYPASS

FLOW AND RETURN VALVES OFF
ENSURE APPLIANCE IS COMPLETELY DISCHARGED AND DRAINED

Next: !p1506, !f1507

AUTO BYPASS

FLOW AND RETURN VALVES OFF
ENSURE APPLIANCE IS COMPLETELY DISCHARGED AND DRAINED

Next: !p1510, !f1511

AUTO BYPASS

FLOW AND RETURN VALVES OFF
ENSURE APPLIANCE IS COMPLETELY DISCHARGED AND DRAINED

Next: !p1514, !f1515

AUTO BYPASS

FLOW AND RETURN VALVES OFF
ENSURE APPLIANCE IS COMPLETELY DISCHARGED AND DRAINED

Next: !p1521, !f1522

CHECK FLOW PIPE TEMP

Next: p1526, !f1527

LOCKOUT RESET FLOW THERMISTOR

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: !p1549, f1544

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p1545, f1546

RESISTANCE SENSOR TEMP PRIMARY

REMOVE THE RED AND BLACK LEADS FROM PRIMARY SENSOR

Next: !p1547, !f1548

LOCKOUT RESET RETURN THERMISTOR

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: !p1556, f1551

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p1552, f1553

RESISTANCE SENSOR TEMP RETURN

REMOVE BLUE AND BLACK LEADS FROM RETURN SENSOR

Next: !p1554, !f1555

LOCKOUT RESET F 67

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: !p1558, !f1559

LOCKOUT RESET F 49

ON/OFF SWITCH ON

Next: !p1566, f2105

LOCKOUT RESET F76

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: p1649, f1631

RESISTANCE OVERHEAT STAT AND HARNESS F76

DISCONNECT CONNECTOR X20 FROM THE ON THE PCB

Next: !p1632, f1633

RESISTANCE OVERHEAT HARNESS

DISCONNECT X20 CONNECTOR FROM THE PCB
DISCONNECT THE LEAD TO THE OVERHEAT STAT

Next: !p1634, !f1635

RESISTANCE OVERHEAT HARNESS

DISCONNECT X20 CONNECTOR FROM THE PCB
DISCONNECT THE LEAD TO THE OVERHEAT STAT

Next: !p1664, !f1665

OBSERVATION PUMP BEHAVIOUR F75

{CHTEMPCONTMAX}

Next: p1672, ?2141, ?2143

RESISTANCE PRESSURE SENSOR HARNESS

DISCONNECT CONNECTOR X2 FROM THE PCB
DISCONNECT CONNECTOR FROM THE LOW WATER PRESSURE SWITCH

Next: !p1679, !f1680

LOCKOUT RESET F63 F65 F67

ON/OFF SWITCH ON

Next: !p1814, !f1815

RESISTANCE OVERHEAT STAT AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE ON THE PCB

Next: !p1844, !f1845

FAN RUNS F32

ENSURE NO DEMANDS

Next: p1848, ?1849, ?1851

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1889, f1890

RESISTANCE SENSOR TEMP PRIMARY

REMOVE THE RED AND BLACK LEADS FROM PRIMARY SENSOR

Next: !p1891, !f1892

RESISTANCE SENSOR TEMP RETURN

REMOVE BLUE AND BLACK LEADS FROM RETURN SENSOR

Next: !p1895, !f1896

RESISTANCE OVERHEAT STAT AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE ON THE PCB

Next: !p1911, !f1912

SYSTEM PRESSURE

Next: p1960, !f1973

RESISTANCE OVERHEAT STAT AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE ON THE PCB

Next: p2016, f2017

RESISTANCE OVERHEAT HARNESS

DISCONNECT X20 CONNECTOR FROM THE PCB
DISCONNECT THE LEAD TO THE OVERHEAT STAT

Next: !p2018, !f2019

RESISTANCE GAS VALVE SOLENOID MAIN F61

REMOVE THE LEADS FROM THE GAS VALVE

Next: !p2022, !f2023

RESISTANCE GAS VALVE SOLENOID MAIN F61

REMOVE THE LEADS FROM THE GAS VALVE

Next: !p2030, !f2031

FUSE FURTHER INVESTIGATION

Next: !p2037, !f2038

VOLTAGE 24 VDC AND 5 VDC X2 REMOVED

REMOVE CONNECTOR X2 FROM THE PCB

Next: p2044, f2045

PCB FURTHER INVESTIGATION

Next: !p2046, !f2047

RESISTANCE GAS VALVE SOLENOID MAIN AND HARNESS

DISCONNECT X20 FROM PCB

Next: p2055, f2056

RESISTANCE GAS VALVE SOLENOID MAIN

DISCONNECT LEAD FROM GAS VALVE

Next: !p2057, !f2058

RESISTANCE FAN

DISCONNECT THE CONNECTOR FROM THE FAN ASSEMBLY

Next: !p2063, !f2064

DISCONNECT TIMER INTERNAL

DISCONNECT THE INTERNAL PROGRAMMER TO THE RIGHT OF THE DISPLAY BOARD

Next: !p2067, f2068

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED?

Next: p2069, ?2070, ?2072

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p2085, f2086

RESISTANCE SENSOR TEMP PRIMARY

REMOVE THE RED AND BLACK LEADS FROM PRIMARY SENSOR

Next: !p2087, !f2088

RESISTANCE SENSOR TEMP RETURN

REMOVE BLUE AND BLACK LEADS FROM RETURN SENSOR

Next: !p2091, !f2092

RESISTANCE PRESSURE SENSOR HARNESS

DISCONNECT CONNECTOR X2 FROM THE PCB
DISCONNECT CONNECTOR FROM THE LOW WATER PRESSURE SWITCH

Next: !p2099, !f2100

RESISTANCE OVERHEAT HARNESS

DISCONNECT X20 CONNECTOR FROM THE PCB
DISCONNECT THE LEAD TO THE OVERHEAT STAT

Next: !p2103, !f2104

OBSERVATION ARE ANY EBUS CONTROLS FITTED

GAIN ACCESS TO THE PCB

Next: p2106, !f2107

SYSTEM PRESSURE

Next: p2116, !f2117

VOLTAGE PRESSURE SENSOR PCB

ON/OFF SWITCH ON

Next: p2120, !f2121

RESISTANCE PRESSURE SENSOR HARNESS

DISCONNECT CONNECTOR X2 FROM THE PCB
DISCONNECT CONNECTOR FROM THE LOW WATER PRESSURE SWITCH

Next: !p2157, !f2158

RESISTANCE PRESSURE SENSOR HARNESS

DISCONNECT CONNECTOR X2 FROM THE PCB
DISCONNECT CONNECTOR FROM THE LOW WATER PRESSURE SWITCH

Next: !p2183, !f2184

AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p2205, !f2206

AUTO BYPASS

FLOW AND RETURN VALVES OFF
ENSURE APPLIANCE IS COMPLETELY DISCHARGED AND DRAINED

Next: p2222, !f2223

OBSERVATION CONNECTOR X40 (CONDENSATE PUMP)

GAIN ACCESS TO PCB

Next: !p2233, f2234

OBSERVATION F77 RESET (CONDENSATE PUMP DISCONNECTED)

REMOVE CONDENSATE PUMP CONNECTOR FROM X40 AND MAKE SAFE

Next: !p2235, !f2236

DISCONNECT X40 DOES SPARKING OCCUR?

REMOVE CONNECTOR X40 FROM THE PCB AND MAKE SAFE

Next: !p2248, f2250

SPARKING PRESENT CH

{CHTEMPCONTMAX}
O

Next: !p2251, f2252

SPARK ELECTRODE LEAD

DISCONNECT FLAME SENSE FROM ELECTRODE
DISCONNECT CONNECTER FROM THE SPARK GENERATOR

Next: p2253, !f2254

VOLTAGE TO DISPLAY (AT PCB)

GAIN ACCESS TO PCB
USE INSULATION MAT AS NECESSARY

Next: !p2261, !f2262

OBSERVATION IS THE DSN SET CORRECTLY

ENSURE NO DEMANDS

Next: p2274, f2275

DIAGNOSTIC CODE D93 SET CORRECTLY

THE DEVICE SPECIFIC

Next: !p2276, !f2277

SPARK ELECTRODE LEAD

DISCONNECT FLAME SENSE FROM ELECTRODE
DISCONNECT CONNECTER FROM THE SPARK GENERATOR

Next: !p2291, !f2292

RESISTANCE GAS VALVE

DISCONNECT THE CONNECTOR FROM THE GAS VALVE

Next: !p351, !f353

INSPECTION BYPASS INTERNAL

{CHTEMPCONTMAX}
ENSURE FLOW AND RETURN ISOLATION VALVES ARE OPEN
ON/OFF SWITCH ON

Next: !p707, f1505

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p761, !f1197

VOLTAGE BOILER SWITCHED LIVE OPERATION REFIRE

Next: p772, !f773

INSPECTION BYPASS INTERNAL

{CHTEMPCONTMAX}
ENSURE FLOW AND RETURN ISOLATION VALVES ARE OPEN
ON/OFF SWITCH ON

Next: !p776, f1520

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p827, !f1185

RESISTANCE GAS VALVE SOLENOID MAIN AND HARNESS

DISCONNECT X20 FROM PCB

Next: p965, f966

RESISTANCE GAS VALVE SOLENOID MAIN

DISCONNECT LEAD FROM GAS VALVE

Next: !p967, !f968

RESISTANCE FAN

DISCONNECT THE CONNECTOR FROM THE FAN ASSEMBLY

Next: !p975, !f976

VOLTAGE PUMP AT PCB

DISCONNECT CONNECTOR X18 FROM THE PCB
(PLACE IN A SAFE POSITION)

Next: p1918, f2084

VOLTAGE PCB DEMAND TO FAN

{CHTEMPCONTMAX}
D

Next: p1340, f1341

RESISTANCE FAN HARNESS

DISCONNECT X20 FROM THE PCB
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1350, !f1351

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p1346, f1347

INSPECTION BURNER

REMOVE THE BURNER MODULE
(REFER TO ADAPT FOR GUIDANCE)

Next: p1388, !f1389

INSPECTION COMBUSTION CHAMBER

REMOVE BURNER MODULE (REFER TO ADAPT FOR GUIDANCE)
(PLACE IN A SAFE PLACE)

Next: p1390, !f1391

INSPECTION FLUE

Next: !p1392, !f1393

INSPECTION BURNER

REMOVE THE BURNER MODULE
(REFER TO ADAPT FOR GUIDANCE)

Next: p1395, !f1396

INSPECTION COMBUSTION CHAMBER

REMOVE BURNER MODULE (REFER TO ADAPT FOR GUIDANCE)
(PLACE IN A SAFE PLACE)

Next: p1397, !f1398

INSPECTION FLUE

Next: !p1399, !f1400

RESISTANCE FAN HARNESS

DISCONNECT X20 FROM THE PCB
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1416, !f1417

SPARKING PRESENT CH

{CHTEMPCONTMAX}
O

Next: !p1603, f1421

AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: !p1598, !f1433

INSPECTION CONDENSATE PIPE

Next: p1436, !f1437

INSPECTION BURNER

REMOVE THE BURNER MODULE
(REFER TO ADAPT FOR GUIDANCE)

Next: p1438, !f1439

INSPECTION COMBUSTION CHAMBER

REMOVE BURNER MODULE (REFER TO ADAPT FOR GUIDANCE)
(PLACE IN A SAFE PLACE)

Next: p2263, !f1441

GAS INLET PRESSURE

{CHTEMPCONTMAX}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: p1487, !f1488

GAS RATE

Next: p1489, f1490

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1501, !f1502

INSPECTION CONDENSATE PIPE

Next: p1495, !f1496

INSPECTION BURNER

REMOVE THE BURNER MODULE
(REFER TO ADAPT FOR GUIDANCE)

Next: p1497, !f1498

INSPECTION COMBUSTION CHAMBER

REMOVE BURNER MODULE (REFER TO ADAPT FOR GUIDANCE)
(PLACE IN A SAFE PLACE)

Next: !p1499, !f1500

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p1503, !f1504

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1528, !f1529

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p1530, !f1531

AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p420, !f1581

AIR INTAKE MANIFOLD

REMOVE THE AIR INTAKE MANIFOLD

Next: p405, !f1596

RUN CH UP TO MAX TEMP DOES IT GO OVERHEAT

{CHTEMPCONTMAX}
ON-OFF SWITCH ON

Next: p1650, !f1651

SYSTEM PRESSURE

Next: p1652, !f1653

PUMP LIMPET TEST

Next: p1654, !f1655

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1656, !f1657

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1658, !f1659

PUMP OVERRUN

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: p2266, !f1661

RESISTANCE OVERHEAT STAT AND HARNESS AT TEMP F76

{CHTEMPCONTMAX}

Next: !p1662, f1663

RUN CH UP TO MAX TEMP DOES IT GO OVERHEAT

{CHTEMPCONTMAX}
ON-OFF SWITCH ON

Next: !p1667, !f1668

SYSTEM PRESSURE

Next: p1673, !f1674

VOLTAGE PRESSURE SENSOR PCB

ON/OFF SWITCH ON

Next: p1675, !f1676

VOLTAGE PRESSURE SENSOR (OUT)

ON/OFF SWITCH ON

Next: p2124, f1678

OBSERVATION F32 REOCCURS

Next: p1863, !f1864

RESISTANCE FAN HARNESS

DISCONNECT X20 FROM THE PCB
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: p1857, !f1858

RESISTANCE FAN HARNESS

DISCONNECT X20 FROM THE PCB
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: p1853, !f1854

VOLTAGE FAN SPEED CONTROL

LEAVE CONNECTOR IN PLACE

Next: !p1855, !f1856

VOLTAGE FAN PCB

{CHTEMPCONTMAX}
D

Next: p1859, !f1860

VOLTAGE PCB DEMAND TO FAN

{CHTEMPCONTMAX}
D

Next: !p1861, !f1862

RESISTANCE FAN HARNESS

DISCONNECT X20 FROM THE PCB
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: p1865, !f1866

VOLTAGE FAN HALL SENSOR

LEAVE CONNECTOR IN PLACE

Next: !p1867, !f1868

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p1893, f1894

RESISTANCE FAN HARNESS

DISCONNECT X20 FROM THE PCB
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: p1914, !f1915

VOLTAGE FAN HALL SENSOR

LEAVE CONNECTOR IN PLACE

Next: !p1916, !f1917

VOLTAGE PUMP PCB CONNECTOR

DISCONNECT CONNECTOR X18 FROM THE PCB
(PLACE IN A SAFE POSITION)

Next: !p1919, !f1920

OBSERVATION STATUS MODE IN CH OP

Next: p1486, f1959

PUMP LIMPET TEST

Next: p1961, !f1972

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1962, !f1963

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p1989, !f1965

INSPECTION FLOW AND RETURN RUBBER HOSES

DISCHARGE THE PRIMARY WATER FROM THE BOILER

Next: !p1990, !f1991

INSPECTION FLOW AND RETURN RUBBER HOSES

DISCHARGE THE PRIMARY WATER FROM THE BOILER

Next: p2216, !f2217

RESISTANCE GAS VALVE AND HARNESS F61/F62

DISCONNECT X20 FROM PCB

Next: p2020, f2021

TIGHTNESS TEST GAS VALVE

Next: p2280, !f2025

RESISTANCE GAS VALVE AND HARNESS F61/F62

DISCONNECT X20 FROM PCB

Next: p2028, f2029

TIGHTNESS TEST GAS VALVE

Next: !p2032, !f2033

RESISTANCE FUSE T2 ( APPLIANCE)

REMOVE FUSE FROM FUSE AND HOLDER FROM PCB

Next: p2041, f2036

VOLTAGE 24 VDC AND 5 VDC ON PCB

Next: p2042, f2043

VOLTAGE TO DISPLAY (AT PCB)

GAIN ACCESS TO PCB
USE INSULATION MAT AS NECESSARY

Next: !p2050, !f2051

VOLTAGE 24VDC AND 5 VDC X2 REFITTED PRESSURE SENSOR REMOVED

REFIT CONNECTOR X2 TO THE PCB
REMOVE CONNECTOR FROM PRESSURE SENSOR AND MAKE SAFE

Next: !p2048, !f2049

RESISTANCE PUMP AND HARNESS

REMOVE X18 FROM THE PCB

Next: p2059, !f2060

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p2061, f2062

EXTERNAL CONTROLS INPUT 240

{CHTEMPCONTMAX}
G

Next: p2080, !f2081

EXTERNAL CONTROLS INPUT 24

{CHTEMPCONTMAX}
G

Next: p2076, !f2077

DISCONNECT EBUS CONTROLS

DISCONNECT EBUS WIRING AND MAKE SAFE

Next: !p2074, !f2075

EXTERNAL CONTROLS OUTPUT 24

{CHTEMPCONTMAX}

Next: !p2078, !f2079

EXTERNAL CONTROLS OUTPUT 240

{CHTEMPCONTMAX}

Next: !p2082, !f2083

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p2089, f2090

SYSTEM PRESSURE

Next: p2093, !f2094

VOLTAGE PRESSURE SENSOR PCB

ON/OFF SWITCH ON

Next: p2095, !f2096

VOLTAGE PRESSURE SENSOR (OUT)

ON/OFF SWITCH ON

Next: p2097, f2098

RESISTANCE OVERHEAT STAT AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE ON THE PCB

Next: !p2101, f2102

DISCONNECT EBUS CONTROLS - FAULT CODE

DISCONNECT EBUS WIRING AND MAKE SAFE

Next: !p2111, !f2113

VOLTAGE PRESSURE SENSOR (OUT)

ON/OFF SWITCH ON

Next: !p2118, f2119

RESISTANCE PRESSURE SENSOR HARNESS

DISCONNECT CONNECTOR X2 FROM THE PCB
DISCONNECT CONNECTOR FROM THE LOW WATER PRESSURE SWITCH

Next: !p2122, !f2123

CHECK PUMP OPERATION

REMOVE VENT PLUG FRO

Next: p2125, !f2126

AUTO AIR VENT/ AIR SYSTEM

Next: p2169, !f2128

INSPECTION FLOW AND RETURN RUBBER HOSES

DISCHARGE THE PRIMARY WATER FROM THE BOILER

Next: p2137, !f2138

EXPANSION VESSEL

FLOW AND RETURN ISOL

Next: !p2139, !f2140

VOLTAGE PUMP AT PCB

DISCONNECT CONNECTOR X18 FROM THE PCB
(PLACE IN A SAFE POSITION)

Next: p2146, !f2147

VOLTAGE PUMP PCB CONNECTOR

DISCONNECT CONNECTOR X18 FROM THE PCB
(PLACE IN A SAFE POSITION)

Next: !p2148, !f2149

SYSTEM PRESSURE

Next: p2151, !f2152

VOLTAGE PRESSURE SENSOR PCB

ON/OFF SWITCH ON

Next: p2153, !f2154

VOLTAGE PRESSURE SENSOR (OUT)

ON/OFF SWITCH ON

Next: p2155, f2156

PUMP LIMPET TEST

Next: p2159, !f2160

AUTO AIR VENT/ AIR SYSTEM

Next: p2161, !f2162

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DISCHARGED AND DRAINED

Next: p2163, !f2164

INSPECTION FLOW AND RETURN RUBBER HOSES

DISCHARGE THE PRIMARY WATER FROM THE BOILER

Next: p2165, !f2166

EXPANSION VESSEL

FLOW AND RETURN ISOL

Next: !p2167, !f2168

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DISCHARGED AND DRAINED

Next: p2136, !f2175

SYSTEM PRESSURE

Next: p2177, !f2178

VOLTAGE PRESSURE SENSOR PCB

ON/OFF SWITCH ON

Next: p2179, !f2180

VOLTAGE PRESSURE SENSOR (OUT)

ON/OFF SWITCH ON

Next: p2181, f2182

CHECK PUMP OPERATION

REMOVE VENT PLUG FRO

Next: p2185, !f2186

AUTO AIR VENT/ AIR SYSTEM

Next: p2187, !f2188

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DISCHARGED AND DRAINED

Next: p2189, !f2190

INSPECTION FLOW AND RETURN RUBBER HOSES

DISCHARGE THE PRIMARY WATER FROM THE BOILER

Next: p2191, !f2192

EXPANSION VESSEL

FLOW AND RETURN ISOL

Next: !p2193, !f2194

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DISCHARGED AND DRAINED

Next: p2228, !f2197

TEMPERATURE DIFFERENTIAL

ON/OFF SWITCH ON

Next: !p2220, f2221

FAN TEST PRESSURE

{CHTEMPCONTMAX}
ATTACH PRESSURE GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: !p2203, f2204

INSPECTION CONDENSATE PIPE

Next: p2207, !f2208

INSPECTION BURNER

REMOVE THE BURNER MODULE
(REFER TO ADAPT FOR GUIDANCE)

Next: p2209, !f2210

INSPECTION COMBUSTION CHAMBER

REMOVE BURNER MODULE (REFER TO ADAPT FOR GUIDANCE)
(PLACE IN A SAFE PLACE)

Next: !p2211, !f2212

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DISCHARGED AND DRAINED

Next: !p2218, !f2219

INSPECTION FLOW AND RETURN RUBBER HOSES

DISCHARGE THE PRIMARY WATER FROM THE BOILER

Next: p2224, !f2226

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DISCHARGED AND DRAINED

Next: !p2225, !f2227

INSPECTION FLOW AND RETURN RUBBER HOSES

DISCHARGE THE PRIMARY WATER FROM THE BOILER

Next: !p2229, !f2230

OBSERVATION CONNECTOR X40 (CONDENSATE PUMP)

GAIN ACCESS TO PCB

Next: p1419, f2247

RESISTANCE FAN HARNESS

DISCONNECT X20 FROM THE PCB
DISCONNECT THE FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: p2255, !f2256

VOLTAGE FAN HALL SENSOR

LEAVE CONNECTOR IN PLACE

Next: !p2257, !f2258

INSPECTION FLUE

Next: !p2264, !f2265

TEMPERATURE DIFFERENTIAL

ON/OFF SWITCH ON

Next: p1660, !f2272

FACTORY RESET - MAIN PCB

ENSURE NO DEMANDS

Next: !p2278, !f2279

LOCKOUT RESET F61 / F62

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: !p2281, !f2282

GAS INLET PRESSURE

{CHTEMPCONTMAX}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: p2285, !f2286

INSPECTION CONDENSATE PIPE

Next: p2287, !f2288

OBSERVATION SPARK QUALITY

REMOVE THE SPARK IGN

Next: p2289, f2290

INSPECTION ELECTRODE AND GAP

Next: p2293, !f2294

INSPECTION BURNER

REMOVE THE BURNER MODULE
(REFER TO ADAPT FOR GUIDANCE)

Next: !p2295, !f2296

GAS PRESSURE INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: p317, !f318

FAN PRESSURE TEST

{CHTEMPCONTMAX}
ATTACH PRESSURE GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: p319, ?321, ?323, ?1430

INSPECTION ELECTRODE AND GAP

Next: !p343, !f344

VOLTAGE GAS VALVE (AT PCB)

{CHTEMPCONTMAX}
ON/OFF SWITCH ON

Next: p346, f1910

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT X20 FROM PCB

Next: !p349, f350

GAS INLET PRESSURE

{CHTEMPCONTMAX}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: p1582, !f406

INSPECTION CONDENSATE PIPE

Next: p407, !f408

INSPECTION ELECTRODE LEAD FLAME SENSE

DISCONNECT FLAME SENSE FROM ELECTRODE
DISCONNECT CONNECTER FROM THE SPARK GENERATOR

Next: p409, !f410

INSPECTION ELECTRODE AND GAP

Next: p1387, !f412

GAS INLET PRESSURE

{CHTEMPCONTMAX}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
ON/OFF SWITCH ON

Next: p1571, !f421

INSPECTION CONDENSATE PIPE

Next: p1394, !f423

EXPANSION VESSEL PRESSURE

FLOW AND RETURN ISOL

Next: !p497, !f498

PUMP LIMPET TEST

Next: p500, !f501

INSPECTION BYPASS INTERNAL

{CHTEMPCONTMAX}
ENSURE FLOW AND RETURN ISOLATION VALVES ARE OPEN
ON/OFF SWITCH ON

Next: p2195, f1513

SYSTEM PRESSURE

Next: p670, !f1217

PUMP LIMPET TEST

Next: p678, !f679

COMBUSTION TEST

{CHTEMPCONTMAX}
O

Next: p680, !f681

INSPECTION BYPASS INTERNAL

{CHTEMPCONTMAX}
ENSURE FLOW AND RETURN ISOLATION VALVES ARE OPEN
ON/OFF SWITCH ON

Next: p682, f1509

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p684, !f1158

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p688, !f1155

GAS RATE

Next: p692, ?2198, ?2200

TEMPERATURE DIFFERENTIAL FLOW RETURN

ON/OFF SWITCH ON

Next: !p694, ?696, ?698

VOLTAGE BOILER SWITCHED LIVE OPERATION REFIRE

Next: p703, !f704

TEMPERATURE SYSTEM FLOW

CH TEMPERATURE CONTROL SET TO 50°C
ON/OFF SWITCH ON
ATTACH TEMPERATURE CLAMP TO FLOW PIPE

Next: p705, f706

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p709, !f1173

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p713, !f1176

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p765, !f1200

TEMPERATURE SYSTEM FLOW

CH TEMPERATURE CONTROL SET TO 50°C
ON/OFF SWITCH ON
ATTACH TEMPERATURE CLAMP TO FLOW PIPE

Next: p774, f775

RESISTANCE SENSOR TEMP PRIMARY AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: p778, !f1203

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p782, !f1206

RESISTANCE SENSOR TEMP RETURN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p1518, !f1188

RESISTANCE PUMP AND HARNESS

REMOVE X18 FROM THE PCB

Next: p969, !f1534

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR X20 FROM THE PCB

Next: !p2052, f974

System Information

  • Total Tests: 594
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control