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:

4704455 VAILLANT ECOTEC PRO 28 H COMBI HEP

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

4704455 VAILLANT ECOTEC PRO 28 H COMBI HEP - CASE REMOVAL INSTRUCTIONS

Next: &3, !f219

OBSERVATION DISPLAY ILLUMINATES

ON OFF SWITCH ON (SWITCH FLUSH WITH THE FASCIA ON THE APPLIANCE)

Next: &655, ?2791, ?2817

DHW FLOW RATE

Next: &542, f104

OBSERVATION FAN RUNS

Next: &177, f1357

OBSERVATION BURNER IGNITION AND ESTABLISH

Next: &2498, ?183, ?185, ?187

OPERATION DHW

Next: &2477, ?278, ?280, ?282, ?284

OPERATION CH

CH THERMOSTAT SET TO MAX

Next: &495, ?438, ?440, ?442

OBSERVATION CH DEMAND RECOGNISED

ENSURE EXTERNAL CONTROLS ARE CALLING FOR HEAT

Next: &437, f1512

OBSERVATION SYSTEM PRESSURE RISE

BOILER CH THERMOSTAT TO MAX

Next: &501, f496

OBSERVATION WARMSTART OPERATION

ENSURE APPLIANCE PRI

Next: &nff, ?503, ?505

OBSERVATION DHW DEMAND RECOGNISED

TURN HOT WATER TAP ON WITH A FLOW RATE OF 4 L/MIN

Next: &554, f543

OBSERVATION DOES PUMP RUN

Next: &137, !f555

OBSERVATION SELF CHECK

NO DEMANDS
ENSURE WARM START TURNED OFF
ENSURE CH TURNED OFF

Next: &2042, ?659, ?661, ?1878, ?1921, ?2848

HEADER FOR F75 FAULT CODE

INTENTIONALLY BLANK HEADER

Next: &nff, f3178

USER DISPLAY GUIDE

THE USER DISPLAY ON

Next: &556, !f656

HEADER FOR F22

INTENTIONALLY BLANK HEADER

Next: &nff, f3066

HEADER FOR F00,F01,F10,F11,F64,F71,F85

INTENTIONALLY BLANK HEADER

Next: &nff, f1851

F23, F24, F72, F83, F84

INTENTIONALLY BLANK HEADER

Next: &nff, f2090

HEADER FOR F13

INTENTIONALLY BLANK HEADER

Next: &nff, f762

HEADER FOR F70

INTENTIONALLY BLANK HEADER

Next: &nff, f792

HEADER FOR F27, F62

INTENTIONALLY BLANK HEADER

Next: &nff, f850

HEADER FOR F32

INTENTIONALLY BLANK HEADER

Next: &nff, f856

HEADER FOR F20

INTENTIONALLY BLANK HEADER

Next: &nff, f1836

HEADER FOR F49

INTENTIONALLY BLANK HEADER

Next: &nff, f938

HEADER FOR F61

INTENTIONALLY BLANK HEADER

Next: &nff, f1593

HEADER FOR FUSE INVESTIGATION

INTENTIONALLY BLANK HEADER

Next: &nff, f1607

HEADER FOR COMMUNICATION FAULT

INTENTIONALLY BLANK HEADER

Next: &nff, f1022

USER DISPLAY GUIDE

THE USER DISPLAY ON

Next: &nff, !f1031

CALLING UP THE INSTALLER LEVEL

Next: &nff, !f1444

INITIATING CHECK PROGRAMME P.01 - MAXIMUM LOAD

Next: &nff, !f1446

CHECKING/ADJUSTING DIAGNOSTIC CODE D.002

Next: &nff, !f2004

TYPE OF DIAGNOSTIC PROCEDURE

Next: &97, !f2043

CHECKING/ADJUSTING DIAGNOSTIC CODE D.001

Next: &nff, !f2321

HEADER FOR F73, F74

INTENTIONALLY BLANK HEADER

Next: &nff, f3048

HEADER FOR F76

INTENTIONALLY BLANK HEADER

Next: &nff, f2733

COMBUSTION PERFORMANCE ANALYSIS

CONNECT FGA TO THE C

Next: &444, f2518

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: &277, !f2499

GUIDANCE FOR MEASURING FLOW RATES AND TEMPERATURE RISES

Next: &nff, !f3099

ADJUSTMENT D.093 - DEVICE SPECIFIC NUMBER (DSN)

Next: &nff, !f3160

HEADER FOR F68

INTENTIONALLY BLANK HEADER

Next: &nff, f3237

HEADER FOR F77

INTENTIONALLY BLANK HEADER

Next: &nff, !f3326

COMMUNICATION FAULT

PCB

Next: End

NO COMMUNICATION

CABLE - DISPLAY

Next: End

BLANK FOR USER DISPLAY GUIDE FOR PREHEAT

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT RECOGNISING DHW DEMAND

SENSOR FITMENT

Next: End

BAFFLING OUT (BLOCKED)

PIPE - INLET - AIR

Next: End

BURNER BAFFLING

GAS INLET PRESSURE

Next: End

NOT OPERATING DIVERTER VALVE

PCB

Next: End

DIVERTER VALVE MOTOR

HARNESS - WIRING X2

Next: End

NOT OPERATING DIVERTER VALVE CH

PCB

Next: End

DIVERTER VALVE MOTOR CH

HARNESS - WIRING X2

Next: End

NOISY

PUMP

Next: End

NOISY CH

PUMP

Next: End

BOILER TO TEMP RADS COLD

PUMP

Next: End

NOT ESTABLISHING

GAS INLET PRESSURE

Next: End

NOT RECTIFYING

CABLE - IGNITION

Next: End

NOT RECTIFYING

ELECTRODE

Next: End

CAUSING NO RECTIFICATION

BURNER

Next: End

IGNITES BUT DOES NOT ESTABLISH

PIPE - INLET - AIR

Next: End

POOR DHW FLOW

VALVE - CONTROL

Next: End

DHW FLOW RATE

COLD WATER SUPPLY

Next: End

NO DEMAND TO FAN

SENSOR - NTC CH FLOW / CH RETURN

Next: End

FAN DOES NOT RUN

PCB

Next: End

FAN DOES NOT RUN

HARNESS - WIRING X20

Next: End

NO DEMAND FOR FAN

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

DHW OPERATION

SENSOR - NTC CH FLOW / CH RETURN

Next: End

DHW OPERATION

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

DHW TOO COOL

SENSOR - NTC CH FLOW / CH RETURN

Next: End

DHW TOO COOL

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

SLOW OR WEAK

PUMP

Next: End

DHW TOO COOL RADS COLD EXCESSIVE DIFFERENTIAL

FILTER PRIMARY CIRCUIT

Next: End

CALLING UP THE INSTALLER LEVEL

Z DIRECTION CHOICE OR CONTINUE

Next: End

USING CHECK PROGRAMMES

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT RESPONDING TO CH DEMANDDEMAND RECOGNISED

Next: End

NO VOLTAGE TO 24V CONTROLS3

PCB

Next: End

NOT RESPONDING TO EBUS CONTROLS

PCB

Next: End

NOT RESPONDING TO EBUS CONTROLS 3

PCB

Next: End

NO VOLTAGE TO 24V CONTROLS 2

PCB

Next: End

NOT RESPONDING TO CH DEMANDDEMAND RECOGNISED 3

Next: End

FAULT CODE F32

PCB

Next: End

FAULT CODE F32 2

PCB

Next: End

FAULT CODE F32 1

PCB

Next: End

FAULT CODE F32

HARNESS - WIRING X20

Next: End

FAULT CODE F61

GAS SECTION

Next: End

FAULT CODE F61

PCB

Next: End

F49

PCB

Next: End

FAULT CODE F49

PCB

Next: End

DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

DHW RUNS HOT THEN COLD

SYSTEM PRESSURE

Next: End

F20

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

F20

SENSOR - NTC CH FLOW / CH RETURN

Next: End

F20

CABLE - IGNITION

Next: End

F20

ELECTRODE

Next: End

LOW PRESSURE

SYSTEM PRESSURE

Next: End

FAULT CODE F70

PCB

Next: End

F13

PCB

Next: End

F13

SENSOR - NTC - DHW HEAT EXCHANGER

Next: End

UNABLE TO ADJUST DIAG CODE

PCB

Next: End

D 071

ADJUSTMENT DIAGNOSTIC CODE

Next: End

D000

ADJUSTMENT DIAGNOSTIC CODE

Next: End

DIAGNOSTIC CODE D002

Z DIRECTION CHOICE OR CONTINUE

Next: End

FUSE FURTHER INVESTIGATION 1

CABLE - PUMP

Next: End

FUSE FURTHER INVESTIAGTION

CABLE - PUMP

Next: End

F00 F01 F10 F11 F64 F71 F85

SENSOR FITMENT

Next: End

FAULT CODES

SENSOR - NTC CH FLOW / CH RETURN

Next: End

FAULT CODES

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

UNABLE TO ADJUST DIAGNOSTIC CODE

PCB

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR FAULT CODES 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

F23 F24 F83 F84

SYSTEM PRESSURE

Next: End

F23 F24 F83 F84

SENSOR - NTC CH FLOW / CH RETURN

Next: End

F23 F24 F83 F84

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

NO POWER TO PUMP OVERHEAT

PCB

Next: End

OVERHEAT

CABLE - PUMP

Next: End

NOT RESPONDING TO EBUS CONTROLS 4

PCB

Next: End

NO POWER TO 24V CONTROLS F23 F24 F83 F84

PCB

Next: End

NOT RESPONDING TO CH DEMAND F23 F24 F83 F84

Next: End

CLOSED TOO MUCH RAISING DIFFERENTIAL

Next: End

CLOSED TOO MUCH OR BLOCKED

BY-PASS

Next: End

EXCESSIVE DIFFERENTIAL AND TEMP RISE FAULT CODE

FILTER PRIMARY CIRCUIT

Next: End

BLANK FOR CASE OFF

Z DIRECTION CHOICE OR CONTINUE

Next: End

WEAK

PUMP

Next: End

PUMP DOES NOT OVERRUN

PCB

Next: End

F23 F24 F83 F84

SENSOR FITMENT

Next: End

OVERHEAT

SERVICE VALVES (COCK)

Next: End

DIAGNOSTIC CODE D001

Z DIRECTION CHOICE OR CONTINUE

Next: End

PUMP RUNS CONTINUOUSLY

SENSOR FITMENT

Next: End

PUMP RUNS CONTINUOUSLY

SENSOR - NTC CH FLOW / CH RETURN

Next: End

PUMP RUNS CONTINUOUSLY

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

TOO LOW

GAS INLET PRESSURE

Next: End

PERFORMANCE TEST FAIL

PIPE - INLET - AIR

Next: End

PERFORMANCE TEST FAIL

CONDENSATE SYPHON

Next: End

PERFORMANCE TEST FAIL

FLUE ASSEMBLY

Next: End

PERFORMANCE TEST FAIL

COMBUSTION SEALS

Next: End

PERFORMANCE TEST FAIL

BURNER

Next: End

PERFORMANCE TEST FAIL

HEAT EXCHANGER

Next: End

PERFORMANCE TEST FAIL

COMBUSTION ADJUSTMENT

Next: End

BAFFLING

HEAT EXCHANGER

Next: End

BAFFLING

BURNER

Next: End

BAFFLING

CONDENSATE SYPHON

Next: End

BAFFLING

FLUE ASSEMBLY

Next: End

DHW RUNS HOT THEN COLD

SENSOR FITMENT

Next: End

DHW RUNS HOT THEN COLD

SENSOR - NTC CH FLOW / CH RETURN

Next: End

DHW RUNS HOT THEN COLD

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

NOT RESPONDING TO EBUS CONTROLS 2

PCB

Next: End

NO VOLTAGE TO 24V CONTROLS

PCB

Next: End

NOT RESPONDING TO CH DEMANDDEMAND RECOGNISED 2

Next: End

DHW RUNS HOT THEN COLD

FILTER PRIMARY CIRCUIT

Next: End

SHUT CAUSING CH NOISE

BY-PASS

Next: End

F76

PCB

Next: End

F76

HARNESS - WIRING X20

Next: End

D 093

ADJUSTMENT DIAGNOSTIC CODE

Next: End

BLOWN STAND BY MODE AT POWER UP

FUSE (MAINS)

Next: End

HARNESS X20 AND X25

HARNESS - WIRING X20

Next: End

HARNESS X2

HARNESS - WIRING X2

Next: End

FUSE F1

FUSE F1

Next: End

OUT OF CAL STOPPING DHW DEMAND RECOGNITION

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

BURNER NOT IGNITING

GAS INLET PRESSURE

Next: End

SPARKING NOT LIGHTING

ELECTRODE

Next: End

HIGH FAN PRESSURE

PIPE - INLET - AIR

Next: End

RESTRICTED FAN PRESSURE

CONDENSATE SYPHON

Next: End

RESTRICTED FAN PRESSURE

BURNER

Next: End

RESTRICTED FAN PRESSURE

HEAT EXCHANGER

Next: End

RESTRICTED FAN PRESSURE

FLUE ASSEMBLY

Next: End

BURNER DOES NOT IGNITE

PCB AND GAS SECTION

Next: End

SPARKING BUT NOT LIGHTING

GAS SECTION

Next: End

POOR HOT WATER

EXTERNAL MIXING

Next: End

NOT SHUTTING BURNER DOWN CH

SENSOR - NTC CH FLOW / CH RETURN

Next: End

NOT SHUTTING BURNER DOWN CH

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

COMMUNICATION FAULT 1

PCB

Next: End

NO COMMUNICATION 1

CABLE - DISPLAY

Next: End

FAULT CODE F73 - F74

PCB

Next: End

F73 F74

HARNESS - WIRING X2

Next: End

FAULT CODE F73 F74

PCB

Next: End

F73 - F74

SYSTEM PRESSURE

Next: End

NO POWER TO LOW PRESSURE SWITCH 2

PCB

Next: End

PCB NOT RECOGNISING SYSTEM PRESSURE

PCB

Next: End

F22

SYSTEM PRESSURE

Next: End

MEASURING FLOW RATE AND TEMP RISES

Z DIRECTION CHOICE OR CONTINUE

Next: End

POOR HOT WATER

CONDENSATE SYPHON

Next: End

POOR HOT WATER

FLUE ASSEMBLY

Next: End

POOR HOT WATER

HEAT EXCHANGER

Next: End

POOR HOT WATER

PIPE - INLET - AIR

Next: End

POOR HOT WATER

BURNER

Next: End

POOR HOT WATER

FAN ASSEMBLY

Next: End

S34

SENSOR - NTC CH FLOW / CH RETURN

Next: End

S34

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FROST PROTECTION

SENSOR - NTC CH FLOW / CH RETURN

Next: End

FROST PROTECTION

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FAULTY FROST PROTECTION

PCB

Next: End

SENSING DHW DEMAND WHEN NONE

PCB

Next: End

SPANNER ON THE DISPLAY

PCB

Next: End

NOT RECOGNISING DEMAND

BURNER OFF LINK

Next: End

FAULT CODE F70

ADJUSTMENT DIAGNOSTIC CODE

Next: End

D093 ADJUSTMENT

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE F32 1

HARNESS - WIRING X20

Next: End

F32

HARNESS - WIRING X20

Next: End

SPEED CONTROL SHORTED

PUMP

Next: End

FAULT CODE F75

SYSTEM PRESSURE

Next: End

PUMP PULSING

SYSTEM PRESSURE

Next: End

NO VOLTAGE TO PUMP

PCB

Next: End

FAULT CODE F75

CABLE - PUMP

Next: End

FAULT CODE F68

CONDENSATE SYPHON

Next: End

FAULT CODE F68

FLUE ASSEMBLY

Next: End

FAULT CODE F68

CABLE - IGNITION

Next: End

FAULT CODE F68

ELECTRODE

Next: End

FAULTY

CONDENSATE PUMP

Next: End

SPANNER SHOWING 2

PCB

Next: End

DC HALL SENSOR

HARNESS - WIRING X20

Next: End

SPARKING

CABLE - IGNITION

Next: End

SPARKING

ELECTRODE

Next: End

DC HALL SENSOR CONDENSATE PUMP

HARNESS - WIRING X20

Next: End

SPARKING CONDENSATE PUMP

CABLE - IGNITION

Next: End

SPARKING CONDENSATE PUMP

ELECTRODE

Next: End

FAULT CODE F75

AIR VENT - AUTOMATIC

Next: End

FAULT CODE F75

EXPANSION VESSEL 10L

Next: End

DOES NOT RUN

PUMP

Next: End

FAULT CODE F75

FILTER PRIMARY CIRCUIT

Next: End

FAULT CODE F75

PUMP

Next: End

FAULT CODE F75 2

AIR VENT - AUTOMATIC

Next: End

FAULT CODE F75 2

EXPANSION VESSEL 10L

Next: End

FAULT CODE F75 2

FILTER PRIMARY CIRCUIT

Next: End

FAULTY CONDENSE PUMP

CONDENSATE FAULT CODE

Next: End

CH NOISY

SERVICE VALVES (COCK)

Next: End

TURNED OFF

SERVICE VALVES (COCK)

Next: End

CH STAYING TOO COOL

SENSOR - NTC CH FLOW / CH RETURN

Next: End

CH STAYING TOO COOL

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

FLAT

EXPANSION VESSEL 10L

Next: End

BOILER NOT RECOGNISING FACILITY

SENSOR - NTC - DHW HEAT EXCHANGER

Next: End

WARMSTART ISSUES

SENSOR - NTC CH FLOW / CH RETURN

Next: End

WARMSTART ISSUES

SENSOR - NTC - CH FLOW / CH RETURN

Next: End

WARM START NOT HOT ENOUGH

SENSOR - NTC - DHW HEAT EXCHANGER

Next: End

OPEN TOO MUCH SO RADS DONT HEAT

Next: End

OPEN TOO MUCH SO BYPASSING RADS

BY-PASS

Next: End

NO VOLTAGE TO AQUA SENSOR

PCB

Next: End

TO AQUA SENSOR

HARNESS - WIRING X2

Next: End

OUT OF CAL STOPING DHW DEMAND RECOGNITION

SENSOR - NTC CH FLOW / CH RETURN

Next: End

PUMP DOES NOT RUN WITH DEMAND

PCB

Next: End

FOR USER DISPLAY GUIDE

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT OPENING TO RADS POSITION

VALVE - 3 WAY

Next: End

CLOSED TOO MUCH NOISY

Next: End

PASSING SOLENOIDS

GAS SECTION

Next: End

F27 F62

ELECTRODE

Next: End

NO COMMUNICATION

DISPLAY

Next: End

HEAT EXCHANGER - DHW

HEAT EXCHANGER - 13 PLATES - DHW

Next: End

FLOW LIMITER

LIMITER

Next: End

PASSING TO RADS

DIVERTER VALVE MOTOR

Next: End

PASSING TO RADS CH

DIVERTER VALVE MOTOR

Next: End

FILTER DHW

FILTER DHW

Next: End

NOT RECOGNISING RECTIFICATION

PCB

Next: End

BAFFLING

GAS SECTION

Next: End

NOT RUNNING WITH CORRECT VOLTAGES

FAN ASSEMBLY

Next: End

NO DEMAND TO FAN FROM PCB

PCB

Next: End

NOT CONTROLLING HW TEMP

PCB

Next: End

DHW TOO COOL

HEAT EXCHANGER

Next: End

DHW TOO COOL

HEAT EXCHANGER - 13 PLATES - DHW

Next: End

NOT RESPONDING TO 240V CONTROLS3

PCB

Next: End

NOT RESPONDING TO 24V CONTROLS3

PCB

Next: End

NOT RESPONDING TO CH DEMAND3

Next: End

NOT RSPONDING TO CH DEMAND

EBUS CONTROL

Next: End

NOT RSPONDING TO CH DEMAND 3

EBUS CONTROL

Next: End

NOT RESPONDING TO 24V CONTROLS 2

PCB

Next: End

NOT RESPONDING TO CH DEMAND

Next: End

NOT RESPONDING TO 240V CONTROLS 2

PCB

Next: End

F32

FAULT CODE RESET

Next: End

FAULT CODE F32

FAN ASSEMBLY

Next: End

FAULT CODE F61

HARNESS - WIRING X20

Next: End

F61

FAULT CODE RESET

Next: End

F49

FAULT CODE RESET - F49

Next: End

FAULT CODE F49

EBUS CONTROL

Next: End

F20

FAULT CODE RESET

Next: End

F20 2

HARNESS - WIRING X20

Next: End

F20

HARNESS - WIRING X20

Next: End

F20

PCB

Next: End

SYSTEM PRESSURE FURTHER INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

DSN NUMBER

FAULT CODE RESET

Next: End

FAULT CODE F70

FACTORY RESET

Next: End

F13

FAULT CODE RESET

Next: End

F13

HARNESS - WIRING X2

Next: End

RAD TEMP LOW

Z DIRECTION CHOICE OR CONTINUE

Next: End

RADIATOR TEMP LOW

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK DISPLAY

FUSE FURTHER INVESTIGATION

Next: End

FUSE INVESTIGATION

PUMP

Next: End

FUSE FURTHER INVESTIGATION

PUMP

Next: End

F00 F01 F10 F11 F64 F71 F85

FAULT CODE RESET

Next: End

THERMISTOR FAULT CODES FLOW SENSOR

HARNESS - WIRING X20

Next: End

THERMISTOR FAULT CODES

PCB

Next: End

THERMISTOR FAULT CODES RETURN SENSOR

HARNESS - WIRING X20

Next: End

BLANK FOR FAULT CODES

Z DIRECTION CHOICE OR CONTINUE

Next: End

OVERHEAT DOES NOT RESET

PCB

Next: End

OVERHEAT

PUMP

Next: End

DHW TOO COOLF23 F24 F83 F84

PCB

Next: End

NOT RESPONDING TO CH DEMAND 4

EBUS CONTROL

Next: End

NOT RESPONDING TO 24V CONTROLS2 F23 F24 F83 F84

PCB

Next: End

NOT RESPONDING TO CH DEMAND F23 F24 F83 F84

Next: End

NOT RESPONDING TO 240V CONTROLS 2F23 F24 F83 F84

PCB

Next: End

F23 F24 F83 F84

HEAT EXCHANGER

Next: End

F23 F24 F83 F84

HEAT EXCHANGER - 13 PLATES - DHW

Next: End

NOT REGISTERING PRESSURE

SENSOR - WATER PRESSURE

Next: End

BLOCKED OR RESTRICTED

SENSOR - WATER PRESSURE

Next: End

BLOCKED OR RESTRICTED

ADAPTOR

Next: End

PUMP RUNS CONTINUOUSLY

PCB

Next: End

PUMP RUNS CONTINUOUSLY

FROST PROTECTION - NORMAL OPERATION

Next: End

PUMP RUNS CONSTANT

PCB

Next: End

PERFORMANCE TEST FAIL

GAS SECTION

Next: End

COMBUSTION VALUES

Z DIRECTION CHOICE OR CONTINUE

Next: End

DHW RUNS HOT THEN COLD

PCB

Next: End

DHW RUNS HOT THEN COLD

HEAT EXCHANGER

Next: End

NOT RSPONDING TO CH DEMAND 2

EBUS CONTROL

Next: End

NOT RESPONDING TO 24V CONTROLS

PCB

Next: End

NOT RESPONDING TO CH DEMAND2

Next: End

NOT RESPONDING TO 240V CONTROLS

PCB

Next: End

NOISY

HEAT EXCHANGER - 13 PLATES - DHW

Next: End

SCALED-NOISY

HEAT EXCHANGER

Next: End

NOISY CH

Next: End

F76

FAULT CODE RESET

Next: End

F76

LINK FOR FLUE GAS SAFETY TEMP LIMITER

Next: End

POOR HW

Z DIRECTION CHOICE OR CONTINUE

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION MAINS

Z DIRECTION CHOICE OR CONTINUE

Next: End

CAUSING BLANK DISPLAY

FAN ASSEMBLY

Next: End

AQUA SENSOR

SENSOR - FLOW

Next: End

BLANK DISPLAY

SENSOR - WATER PRESSURE

Next: End

DISPLAY PCB

DISPLAY

Next: End

HARNESS DISPLAY PCB

CABLE - DISPLAY

Next: End

PCB MAIN

PCB

Next: End

FURTHER INVESTIGATION FUSE F1

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT RECOGNISING DEMAND

PCB

Next: End

INCORRECT MIX

GAS SECTION

Next: End

FAN PRESSURE INCORRECT

FAN ASSEMBLY

Next: End

NO VOLTAGE TO GAS VALVE

PCB

Next: End

BURNER DOES NOT IGNITE

PCB AND HARNESS X20

Next: End

SPARKING BUT NOT LIGHTING

HARNESS - WIRING X20

Next: End

SOLENOID NOT OPENING

GAS SECTION

Next: End

DHW TOO COOL

PCB

Next: End

NOT SHUTTING BURNER DOWN ON CH

PCB

Next: End

NO COMMUNICATION 1

DISPLAY

Next: End

FAULT CODE F73 - F74

SENSOR - WATER PRESSURE

Next: End

F73 F74

SENSOR - WATER PRESSURE

Next: End

F73 F74

ADAPTOR

Next: End

FAULT CODE F73 F74

SENSOR - WATER PRESSURE

Next: End

FAULT CODE F73 - F74

FAULT CODE RESET

Next: End

F72

SENSOR - WATER PRESSURE

Next: End

FAULT CODE F22

ADAPTOR

Next: End

FAULT CODE F22

SENSOR - WATER PRESSURE

Next: End

LOW SYSTEM PRESSURE

FAULT CODE RESET

Next: End

POOR HOT WATER

GAS SECTION

Next: End

OPERATION CORRECTLY

FROST PROTECTION - NORMAL OPERATION

Next: End

TAP OPEN OR LEAKING DHW DRAW OFF

TAP OPEN OR LEAKING DHW DRAW OFF

Next: End

SPANNER ON DISPLAY

MAINTENANCE INTERVAL SURPASSED

Next: End

FAULT CODE F70

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE F32 1

FAN ASSEMBLY

Next: End

FAULT CODE F32 3

PCB

Next: End

SHORTED

CABLE - PUMP

Next: End

FAULT CODE F75 F75

PUMP

Next: End

F68

PCB

Next: End

SPANNER ON DISPLAY 2

MAINTENANCE INTERVAL SURPASSED

Next: End

HALL SENSOR SIGNAL

FAN ASSEMBLY

Next: End

NOT SPARKING

PCB

Next: End

HALL SENSOR SIGNAL CONDENSATE PUMP

FAN ASSEMBLY

Next: End

NOT SPARKING CONDENSATE PUMP

PCB

Next: End

FAULTY 2

CONDENSATE PUMP

Next: End

FAULT CODE F75

SENSOR - WATER PRESSURE

Next: End

FAULT CODE F75 2

SENSOR - WATER PRESSURE

Next: End

PASSING TO RADS

VALVE - 3 WAY

Next: End

CH REMAINING TOO COOL

PCB

Next: End

BLOCKED

TUBE - EXPANSION VESSEL

Next: End

NOT RECOGNISING WARM START FACILITY

PCB

Next: End

WARM START SENSOR

HARNESS - WIRING X2

Next: End

NOT HEATING ENOUGH ON WARMSTART

PCB

Next: End

NOT SENSING DEMAND

SENSOR - FLOW

Next: End

BOILER TO TEMP BUT RADS COOL

Next: End

F27 F62

PCB

Next: End

LIMITER BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION FLOW LIMITER AND FILTER

Next: !p114

FILTER BLOCKED OR RESTRICTED

CHARACTERISTIC TEST FROM INSPECTION FLOW LIMITER AND FILTER

Next: !p116

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: !p1408

BOILER DOES NOT RESPOND TO CENTRAL HEATING

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p1563

24 VOLT EXTERNAL CONTROLS FITTED

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

Next: p1531

EBUS CONTROLS FITTED

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

Next: p1517

24 VOLT EXTERNAL CONTROLS FITTED

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

Next: p1566

EBUS CONTROLS FITTED

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

Next: p1568

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS - FAULT CODE F32

Next: p1580

FAN RUNS AND/OR STOPS AND RESTARTS - FAULT CODE F32 OCCURS

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS - FAULT CODE F32

Next: p1582

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p2856

BURNER IGNITES BUT DOES NOT ESTABLISH (FLAME SYMBOL DOES NOT APPEAR ON DISPLAY) - RECTIFICATION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p1237

BURNER IGNITES BUT BAFFLES OUT/NOISY - COMBUSTION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p1106

PUMP RUNS CONTINUOUSLY

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK

Next: p2446

LOW SYSTEM PRESSURE DISPLAYED

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK

Next: p1922

CON X22 PUMP SPEED CONTROL RESISTANCES NOT AS ABOVE

CHARACTERISTIC TEST FROM RESISTANCE PUMP AND HARNESS

Next: p2019

CON X18 PUMP MAIN SUPPLY RESISTANCES NOT AS ABOVE

CHARACTERISTIC TEST FROM RESISTANCE PUMP AND HARNESS

Next: p2021

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p2160

BOILER DOES NOT RESPOND TO CENTRAL HEATING

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p2162

24 VOLT EXTERNAL CONTROLS FITTED

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

Next: p2165

EBUS CONTROLS FITTED

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

Next: p2167

WATER PRESSURE SENSOR RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

Next: !p2371

ADAPTOR RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

Next: !p2373

STATUS CODE S.34 SHOWN

CHARACTERISTIC TEST FROM OBSERVATION WHICH STATUS CODE IS SHOWN

Next: !p2461

STATUS CODE S.96 OR S.98 SHOWN

CHARACTERISTIC TEST FROM OBSERVATION WHICH STATUS CODE IS SHOWN

Next: p2464

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM RESISTANCE PUMP AND HARNESS

Next: !p2699

BOILER DOES NOT RESPOND TO CENTRAL HEATING

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER

Next: p2701

24 VOLT EXTERNAL CONTROLS FITTED

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

Next: p2704

EBUS CONTROLS FITTED

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

Next: p2706

DIFFERENTIAL INCORRECT OR LOCAL NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER FOR CH NOISE

Next: !p2729

DIFFERENTIAL OK SYSTEM NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL PRIMARY HEAT EXCHANGER FOR CH NOISE

Next: !p2731

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1392

DISPLAY ILLUMINATES BUT NO INFORMATION/TEXT ON SCREEN

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMINATES

Next: p3036

TEMPERATURE RISE UNSATISFACTORY, RADIATORS REMAIN COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1888

DISPLAY DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM OBSERVATION DISPLAY ILLUMINATES

Next: p2819

TEMPERATURE RISE UNSATISFACTORY, RADIATORS HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p283

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p1752

BOILER COMPLETES SELF CHECK AS DESCRIBED BUT SPANNER ON THE DISPLAY

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK

Next: p3246

ADAPTOR RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

Next: !p3060

WATER PRESSURE SENSOR RESTRCITED OR BLOCKED

CHARACTERISTIC TEST FROM RESISTANCE PUMP AND HARNESS

Next: !p3062

ADAPTOR RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

Next: !p3075

WATER PRESSURE SENSOR RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

Next: !p3077

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP BEHAVIOUR F75

Next: p3220

PUMP RUNS OR F75 OCCURING INTERMITTENTLY

CHARACTERISTIC TEST FROM OBSERVATION PUMP BEHAVIOUR F75

Next: p3183

BOILER NOISY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p439

BOILER UP TO TEMP RADS COLD

CHARACTERISTIC TEST FROM OPERATION CH

Next: p470

BOILER AND SYSTEM TEMPERATURE LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p1965

BOILER DOES NOT GIVE THE OPTION OF ACTIVATING WARMSTART

CHARACTERISTIC TEST FROM OBSERVATION WARMSTART OPERATION

Next: p504

BOILER DOES NOT HEAT SUFFICIENTLY ON WARM START

CHARACTERISTIC TEST FROM OBSERVATION WARMSTART OPERATION

Next: p506

BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK

Next: p2423

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM OBSERVATION SELF CHECK

Next: p670

25/08/2021 08:48:03 2108_1_50_1 23/09/2021 09:29:12

14/09/2021 12:07:54

Next: End

VOLTAGE TO DISPLAY PCB AT MAIN PCB

REMOVE THE DISPLAY HARNESS CONNECTOR FROM THE MAIN PCB

Next: p1023, !f1024

INSPECTION DHW ISOLATION VALVE

Next: p1257, !f1264

VOLTAGE DIVERTER VALVE

REMOVE CONNECTOR FROM THE DIVERTER VALVE AND MAKE SAFE
ENSURE NO DEMANDS

Next: p1153, !f1151

VOLTAGE DIVERTER VALVE

REMOVE CONNECTOR FROM THE DIVERTER VALVE AND MAKE SAFE
ENSURE NO DEMANDS

Next: p1157, !f1158

VOLTAGE DC PWM DEMAND AT FAN

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1366, f1367

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p1368, !f1369

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p1406, ?1407, ?1409

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p1523, ?1514, ?1516

VOLTAGE TO 24V EXTERNAL CONTROLS

Next: !p1534, !f1535

VOLTAGE TO 24V EXTERNAL CONTROLS

Next: !p1573, !f1574

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p1594, f1595

RESISTANCE GAS VALVE

REMOVE THE LEFT HAND

Next: !p1596, !f1597

OBSERVATION ARE ANY EBUS CONTROLS FITTED

{GAINPCBACS}

Next: p1603, !f1604

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR X22

Next: !p2017, ?2018, ?2020

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1837, f1838

RESISTANCE FLOW SENSOR AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p1839, f1840

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: !p1841, !f1842

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p1845, !f1846

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2029, f2030

OBSERVATION IS THE DSN SET CORRECTLY - D.093

ENSURE NO DEMANDS

Next: p1950, f3156

RESISTANCE WARM START SENSOR

REMOVE THE CONNECTOR FROM THE WARM START SENSOR

Next: !p1960, !f1961

ADJUSTMENT D.071 - TARGET VALUE MAXIMUM HEATING FLOW TEMPERATURE

Next: p1993, !f1994

ADJUSTMENT D.000 - HEATING PARTIAL LOAD

Next: p1989, !f2041

OBSERVATION SENSORS CORRECTLY FITTED

Next: p2031, !f2032

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: !p2035, !f2036

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p2039, !f2040

RESET APPLIANCE - ENSURE APPLIANCE IS COOL

ENSURE NO DEMANDS ARE PRESENT
ENSURE APPLIANCE IS COOL

Next: p2097, f2140

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p2141, !f2142

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p2150, !f2151

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p2158, ?2159, ?2161

VOLTAGE TO 24V EXTERNAL CONTROLS

Next: !p2172, !f2173

INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

DRAIN PRIMARY WATER

Next: !p2369, ?2370, ?2372

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p2519, !f2520

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p2529, !f2530

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p2697, ?2698, ?2700

VOLTAGE TO 24V EXTERNAL CONTROLS

Next: !p2711, !f2712

RESISTANCE HARNESS AND LINK FOR FLUE GAS SAFETY TEMP LIMITER

REMOVE CONNECTOR X20 FROM THE PCB

Next: p2745, f2748

RESISTANCE HARNESS FLUE GAS SAFETY TEMP LIMITER

REMOVE CONNECTOR X20 FROM THE PCB
DISCONNECT THE PLUG AT THE INLINE CONNECTOR (AS SHOWN)

Next: !p2750, !f2751

DIAGNOSTIC CODE D.093 SET CORRECTLY

THE DEVICE SPECIFIC

Next: !p2758, !f2759

RESISTANCE MAINS SUPPLY FUSE

REMOVE THE MAINS 3A FUSE FROM ITS HOLDER

Next: !p2822, f2823

FUSE FURTHER INVESTIGATION MAINS

Next: !p2824, !f2825

OBSERVATION RE ATTACH X2

REFIT CONNECTOR X2 (BLUE) TO THE PCB

Next: p2828, f2829

OBSERVATION RE ATTACH X20

REFIT CONNECTOR X20 (RED) TO THE PCB

Next: p2830, f2831

OBSERVATION RE ATTACH X22 BUT DISCONNECT PUMP SPEED CONTROL

REFIT CONNECTOR X22 TO THE PCB
DISCONNECT PUMP SPEED CONTROL FROM THE PUMP AND MAKE SAFE

Next: !p3176, !f3177

OBSERVATION DISCONNECT LOW WATER PRESSURE SENSOR

REMOVE THE CONNECTOR FROM THE LOW WATER
PRESSURE SWITCH AND MAKE SAFE

Next: !p2838, !f2839

VOLTAGE TO DISPLAY PCB AT MAIN PCB

REMOVE THE DISPLAY HARNESS CONNECTOR FROM THE MAIN PCB

Next: !p2842, f2843

RESISTANCE FUSE F1

REMOVE FUSE F1 FROM ITS HOLDER ON THE PCB

Next: !p2844, f2845

FUSE FURTHER INVESTIGATION F1

Next: !p2846, !f2847

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p2993, !f2994

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}

Next: p3004, f3005

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p3006, f3007

RESISTANCE GAS VALVE

REMOVE THE LEFT HAND

Next: !p3008, !f3009

RESISTANCE GAS VALVE

REMOVE THE LEFT HAND

Next: !p3011, !f3012

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p3101, !f3110

OBSERVATION SYSTEM PRESSURE

Next: p3049, !f3065

VOLTAGE TO WATER PRESSURE SENSOR

Next: p3052, !f3053

INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

DRAIN PRIMARY WATER

Next: !p3058, ?3059, ?3061

OBSERVATION SYSTEM PRESSURE

Next: p3067, !f3080

VOLTAGE TO WATER PRESSURE SENSOR

Next: p3070, !f3071

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3123, !f3124

DIAGNOSTIC CODE D.093 SET CORRECTLY

THE DEVICE SPECIFIC

Next: !p3157, !f3158

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X20 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3163, !f3164

OBSERVATION PUMP BEHAVIOUR F75

Next: p3179, ?3180, ?3182

INSPECTION CONDENSATE TRAP

Next: p3238, !f3242

OBSERVATION DISCONNECT CONDENSATE PUMP (SPANNER)

REMOVE THE TWO WIRES

Next: p3253, !f3254

OBSERVATION VAILLANT CONDENSATE PUMP FITTED (X40)

GAIN ACCESS TO THE PCB

Next: p3269, f3278

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X20 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3272, !f3273

OBSERVATION DISCONNECT CONDENSATE PUMP (SPARKING)

REMOVE IGNITION ELEC

Next: !p3300, f3291

VOLTAGE HALL SENSOR

{GAINPCBACS}

Next: p3292, f3293

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X20 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3294, !f3295

PRESSURE EXPANSION VESSEL

APPLIANCE PRIMARY CIRCUIT DRAINED AND DISCHARGED

Next: !p497, !f498

RESISTANCE WARM START SENSOR

REMOVE THE CONNECTOR FROM THE WARM START SENSOR

Next: !p509, !f510

VOLTAGE DEMAND FROM AQUA SENSOR

{GAINPCBACS}
ENSURE A FLOW RATE ABOVE 3 LITRES PER MINUTE

Next: p1043, f545

VOLTAGE TO AQUA SENSOR

Next: p546, !f547

RESISTANCE WARM START SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p1956, f1959

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1948, f1949

OBSERVATION BURNER EXTINGUISH

Next: p852, !f851

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: p891, !f1577

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1601, f1602

RESISTANCE HARNESS DISPLAY PCB

REMOVE DISPLAY HARNESS FROM X51 CONNECTIONS

Next: !p1025, !f1026

OBSERVATION SENSORS CORRECTLY FITTED

Next: p544, !f1049

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p188, !f1070

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p1050, !f1128

INSPECTION FLOW LIMITER AND FILTER

DHW SUPPLY ISOLATED

Next: !p112, ?113, ?115

RESISTANCE DIVERTER VALVE HARNESS

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE MOTOR

Next: !p1154, !f1155

RESISTANCE DIVERTER VALVE HARNESS

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE MOTOR

Next: !p1159, !f1160

PUMP LIMPET

Next: p285, !f1178

PUMP LIMPET

Next: p461, !f1189

PUMP LIMPET

Next: p535, !f1194

INSPECTION AIR INTAKE TUBE

REMOVE AIR INTAKE TUBE

Next: p1238, !f1247

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p1239, !f1240

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE PCB
REMOVE THE IGNITION LEAD FROM THE SPARK ELECTRODE

Next: p1241, !f1242

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p1243, !f1244

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: !p1245, !f1246

OBSERVATION COLD WATER SUPPLY

Next: p111, !f1265

INSPECTION CONDENSATE TRAP

Next: p1341, !f2627

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p1343, !f2626

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: !p1345, !f2625

VOLTAGE FAN 22VDC AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1374, !f1375

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p1390, !f1391

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X20 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1376, !f1377

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p1393, !f1394

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p1395, !f1396

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p1398, !f1399

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p1400, !f1401

PUMP LIMPET

Next: p1402, !f1403

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: p3014, f1405

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p1419, !f1420

DISCONNECT EBUS CONTROLS - CH DEMAND

DISCONNECT EBUS WIRING FROM CONNECTOR X100 AND MAKE SAFE

Next: !p1536, !f1537

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p1529, !f1530

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p1532, f1533

OBSERVATION D.000 - ADJUSTABLE HEATING PARTIAL LOAD

ENSURE NO DEMANDS

Next: p443, f1988

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p1564, ?1565, ?1567

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p1575, !f1576

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p1571, f1572

DISCONNECT EBUS CONTROLS - CH DEMAND

DISCONNECT EBUS WIRING FROM CONNECTOR X100 AND MAKE SAFE

Next: !p1569, !f1570

VOLTAGE DC PWM DEMAND AT FAN

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1583, !f1584

VOLTAGE HALL SENSOR

{GAINPCBACS}

Next: p3161, f3162

VOLTAGE FAN 22VDC AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1585, !f1586

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X20 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p1587, !f1588

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1598, !f1599

DISCONNECT EBUS CONTROLS

DISCONNECT EBUS WIRING FROM CONNECTOR X100 AND MAKE SAFE

Next: !p1605, !f1606

OBSERVATION SYSTEM PRESSURE

Next: p1397, !f1751

OBSERVATION SYSTEM PRESSURE

Next: p1778, !f1804

OBSERVATION SENSORS CORRECTLY FITTED

Next: p2632, !f2662

RESISTANCE RETURN SENSOR AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p1843, f1844

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE PCB
REMOVE THE IGNITION LEAD FROM THE SPARK ELECTRODE

Next: p1847, !f1848

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: !p1849, !f1850

INSPECTION FLUE

Next: p1340, !f2628

OBSERVATION IS THE DSN SET CORRECTLY - D.093

ENSURE NO DEMANDS

Next: p1713, f2757

OBSERVATION SYSTEM PRESSURE - LOW PRESSURE

Next: p1923, f2368

SYSTEM PRESSURE FURTHER INVESTIGATION

THE SYSTEM PRESSURE

Next: !p1925, !f1926

FACTORY RESET - MAIN PCB

Next: !p1954, !f1955

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1957, !f1958

OBSERVATION D.071 - TARGET VALUE MAXIMUM HEATING FLOW TEMPERATURE

ENSURE NO DEMANDS

Next: p1552, f1984

DIAGNOSTIC CODE D.000 SET CORRECTLY

THE HEATING PARTIAL

Next: !p1990, !f2002

DIAGNOSTIC CODE D.071 SET CORRECTLY

THE TARGET VALUE MAX

Next: !p1995, !f1996

RESISTANCE PUMP SPEED CONTROL HARNESS

REMOVE CONNECTOR X22

Next: !p2022, !f2023

RESISTANCE PUMP MAIN SUPPLY HARNESS

REMOVE CONNECTOR X18

Next: !p2024, !f2025

RESISTANCE FLOW SENSOR AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p2033, f2034

RESISTANCE RETURN SENSOR AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p2037, f2038

OBSERVATION SYSTEM PRESSURE

Next: p2098, !f2099

OBSERVATION SENSORS CORRECTLY FITTED

Next: p2213, !f2251

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p2143, !f2144

OBSERVATION DOES PUMP RUN

Next: p2148, f2149

PUMP LIMPET

Next: p2183, !f2211

RESISTANCE PUMP MAIN SUPPLY HARNESS

REMOVE CONNECTOR X18

Next: !p2152, !f2153

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: !p2156, f2157

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p2180, !f2181

INSPECTION EXTERNAL BYPASS

Next: p2176, !f2177

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p2163, ?2164, ?2166

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p2174, !f2175

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p2170, f2171

DISCONNECT EBUS CONTROLS - CH DEMAND

DISCONNECT EBUS WIRING FROM CONNECTOR X100 AND MAKE SAFE

Next: !p2168, !f2169

INSPECTION INTEGRAL BYPASS

APPLIANCE DRAINED AND DISCHARGED

Next: !p2178, !f2179

OBSERVATION PUMP OVERRUN

ENSURE CH CONTROLS ARE CALLING FOR HEAT

Next: p2154, !f2212

INSPECTION FLOW AND RETURN VALVES

Next: p2147, !f2252

OBSERVATION IS STATUS CODE S.34 SHOWN

Next: p3117, f3122

OBSERVATION WHICH STATUS CODE IS SHOWN

Next: !p2459, ?2460, ?2462

OBSERVATION SENSORS CORRECTLY FITTED

Next: p2465, !f2466

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p2467, !f2468

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p2469, !f2470

INSPECTION CONDENSATE TRAP

Next: p2521, !f2522

INSPECTION FLUE

Next: p2523, !f2524

INSPECTION COMBUSTION SEALS

Next: p2525, !f2526

OBSERVATION CAN COMBUSTION BE ADJUSTED

CONNECT FGA TO THE C

Next: p2527, f2528

COMBUSTION VALUES CORRECTLY ADJUSTED

THE COMBUSTION READI

Next: !p2533, !f2534

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: !p2531, !f2532

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p2663, !f2693

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p1163, !f2694

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p2715, !f2716

OBSERVATION WHAT TYPE OF EXTERNAL CONTROLS ARE FITTED ?

GAIN ACCESS TO THE PCB

Next: p2702, ?2703, ?2705

VOLTAGE FROM 240V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p2713, !f2714

VOLTAGE FROM 24V EXTERNAL CONTROLS

{GAINPCBACS}
ENSURE ALL EXTERNAL CONTROLS ARE CALLING

Next: !p2709, f2710

DISCONNECT EBUS CONTROLS - CH DEMAND

DISCONNECT EBUS WIRING FROM CONNECTOR X100 AND MAKE SAFE

Next: !p2707, !f2708

TEMPERATURE DIFFERENTIAL PRIMARY HEAT EXCHANGER FOR CH NOISE

ATTACH TEMPERATURE C

Next: p3031, ?2728, ?2730

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2746, !f2747

VOLTAGE MAINS POWER INPUT TO APPLIANCE

{GAINPCBACS}

Next: p2820, f2821

OBSERVATION REMOVE CONNECTORS FROM PCB

REMOVE CONNECTORS X20 (RED) X2 (BLUE) AND X22 FROM
THE PCB AND MAKE SAFE

Next: p2826, f2827

VOLTAGE TO DISPLAY PCB AT DISPLAY PCB

Next: !p2840, f2841

OBSERVATION DISCONNECT AQUA SENSOR

REMOVE THE CONNECTOR FROM THE AQUA SENSOR AND MAKE SAFE

Next: !p2836, f2837

INSPECTION DIVERTER VALVE MOTOR OPERATION

REMOVE THE DIVERTER

Next: !p356, f1149

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X20 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p2834, !f2835

INSPECTION BURNER OFF LINK

Next: p3152, !f3155

TEMPERATURE DIFFERENTIAL DHW HEAT EXCHANGER

ATTACH TEMPERATURE C

Next: !p2695, f2696

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p2885, !f2895

OBSERVATION IS SPARKING PRESENT

REMOVE IGNITION ELEC

Next: p2932, f3259

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p2946, !f2968

PRESSURE FAN

ATTACH PRESSURE TUBE

Next: p2969, f2992

PRESSURE FAN - EQUALISATION

ATTACH PRESSURE TUBE

Next: !p2991, f3003

INSPECTION CONDENSATE TRAP

Next: p2995, !f2996

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p2997, !f2998

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: p2999, !f3000

INSPECTION FLUE

Next: !p3001, !f3002

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p3013, f3010

GAS RATE

Next: p3015, f3016

TEMPERATURE COMPARISON OF HOT WATER - EXTERNAL MIXING TEST

Next: !p3029, !f3030

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3032, !f3033

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3034, !f3035

VOLTAGE TO DISPLAY PCB AT MAIN PCB

REMOVE THE DISPLAY HARNESS CONNECTOR FROM THE MAIN PCB

Next: p3037, !f3038

RESISTANCE HARNESS DISPLAY PCB

REMOVE DISPLAY HARNESS FROM X51 CONNECTIONS

Next: !p3039, !f3040

VOLTAGE FROM WATER PRESSURE SENSOR

{GAINPCBACS}

Next: p3050, f3051

OBSERVATION ADJUST PRIMARY SYSTEM PRESSURE

LOCATE SYSTEM FILING LOOP

Next: p3056, f3057

RESISTANCE WATER PRESSURE SENSOR HARNESS

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

Next: !p3054, !f3055

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p3063, !f3064

OBSERVATION ADJUST SYSTEM PRESSURE

{GAINPCBACS}
LOCATE THE SYSTEM FILLING LOOP

Next: p3068, f3069

RESET APPLIANCE - FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p3078, !f3079

INSPECTION WATER PRESSURE SENSOR AND ADAPTOR

DRAIN PRIMARY WATER

Next: !p3072, ?3074, ?3076

INSPECTION CONDENSATE TRAP

Next: p3102, !f3103

INSPECTION FLUE

Next: p3104, !f3105

INSPECTION BURNER

REMOVE THE COMBUSTION FRONT ASSEMBLY

Next: p3111, !f3115

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

REMOVE THE BURNER DOOR ASSEMBLY

Next: !p3108, !f3109

INSPECTION FAN

Next: p3106, !f3116

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p3118, !f3119

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p3120, !f3121

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p3125, !f3126

OBSERVATION DHW DEMAND INCORRECTLY RECOGNISED

HOT WATER TAPS OFF

Next: p3127, !f3128

OBSERVATION ISOLATE MAINS WATER - DOES DEMAND STOP ?

TURN OFF THE DHW ISOLATION VALVE

Next: !p3129, !f3130

OBSERVATION HAS THE MAINTENANCE INTERVAL SURPASSED ?

Next: !p3153, !f3154

RESISTANCE FAN HARNESS

REMOVE CONNECTOR X20 FROM THE PCB
REMOVE THE DC FAN CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3165, !f3166

OBSERVATION SYSTEM PRESSURE

Next: p3308, !f3205

OBSERVATION SYSTEM PRESSURE

Next: p3317, !f3185

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p3221, !f3222

RESISTANCE PUMP MAIN SUPPLY HARNESS

REMOVE CONNECTOR X18

Next: !p3223, !f3224

INSPECTION FLUE

Next: p3239, !f3243

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE PCB
REMOVE THE IGNITION LEAD FROM THE SPARK ELECTRODE

Next: p3240, !f3244

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: !p3241, !f3245

OBSERVATION VAILLANT CONDENSATE PUMP FITTED (BURNER OFF)

GAIN ACCESS TO THE PCB

Next: p2849, f3252

OBSERVATION HAS THE MAINTENANCE INTERVAL SURPASSED ?

Next: !p3258, !f3256

VOLTAGE HALL SENSOR

{GAINPCBACS}

Next: p3270, f3271

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE PCB
REMOVE THE IGNITION LEAD FROM THE SPARK ELECTRODE

Next: p3274, !f3275

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: !p3276, !f3277

RESISTANCE IGNITION LEAD

REMOVE THE IGNITION LEAD FROM THE PCB
REMOVE THE IGNITION LEAD FROM THE SPARK ELECTRODE

Next: p3296, !f3297

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: !p3298, !f3299

INSPECTION AUTO AIR VENT / AIR IN SYSTEM

Next: p3309, !f3310

PRESSURE EXPANSION VESSEL

APPLIANCE PRIMARY CIRCUIT DRAINED AND DISCHARGED

Next: p3311, !f3312

INSPECTION PUMP IMPELLER

BOILER PRIMARY CIRCUIT DRAINED AS NECESSARY

Next: p3313, !f3314

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p3315, !f3316

PUMP LIMPET

Next: p3318, !f3319

INSPECTION AUTO AIR VENT / AIR IN SYSTEM

Next: p3320, !f3321

PRESSURE EXPANSION VESSEL

APPLIANCE PRIMARY CIRCUIT DRAINED AND DISCHARGED

Next: p3322, !f3323

INSPECTION FILTER PRIMARY CIRCUIT

APPLIANCE DRAINED AND DISCHARGED

Next: !p3324, !f3325

INSPECTION FLOW AND RETURN VALVES

Next: p768, !f468

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p490, !f492

INSPECTION INTEGRAL BYPASS

APPLIANCE DRAINED AND DISCHARGED

Next: p2726, !f2732

INSPECTION FLOW AND RETURN VALVES

Next: p518, !f480

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p491, !f493

RESISTANCE WARM START SENSOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p507, f508

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p511, !f513

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: p515, !f514

RESISTANCE WARM START SENSOR

REMOVE THE CONNECTOR FROM THE WARM START SENSOR

Next: !p516, !f517

INSPECTION DIVERTER VALVE MOTOR OPERATION

REMOVE THE DIVERTER

Next: p686, f1156

INSPECTION EXTERNAL BYPASS

Next: p1190, !f531

OBSERVATION CLOSE INTEGRAL BYPASS

CLOSE THE INTEGRAL B

Next: !p692, !f537

RESISTANCE FLOW SENSOR

REMOVE THE CONNECTOR FROM THE FLOW SENSOR (RED)

Next: p550, !f551

RESISTANCE CHECK AQUA SENSOR HARNESS

REMOVE THE CONNECTOR FROM THE AQUA SENSOR
REMOVE CONNECTOR X2 FROM THE PCB

Next: !p548, !f549

RESISTANCE RETURN SENSOR

REMOVE THE CONNECTOR FROM THE RETURN SENSOR (BLUE)

Next: !p2854, !f2855

FAULT CODES

Next: !p2046, !f2047

INSPECTION DIVERTER VALVE SPINDLE

REMOVE THE DIVERTER VALVE MOTOR FROM THE BODY

Next: p530, !f693

INSPECTION EXTERNAL BYPASS

Next: p1179, !f778

INSPECTION SPARK ELECTRODE

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: !p854, !f853

OBSERVATION FAN RUNS - FAULT CODE F32

Next: !p1578, ?1579, ?1581

System Information

  • Total Tests: 689
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control