Fault Codes; Fault Memory; Fault Finding Charts - Vaillant 824/2 E Instructions For Installation Manual

Turbomax plus and thermocompact wall hung room sealed fan assisted combination and system boilers
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10 Fault Finding

10.7 Fault codes

Fault codes take priority over all other display functions
in the event of a system fault occurring. If multiple
faults occur, the corresponding fault codes are displayed
alternately for about two seconds each.

10.8 Fault memory

The fault memory stores details of the ten most recent
faults.
Display
Indication
F.00
Flow-NTC:
NTC broken; NTC cable broken; Defective connection at NTC
Defective connection at electronics
F.01
Return NTC:
NTC broken; NTC cable broken; Defective connection at NTC
Defective connection at electronics
F.10
Short circuit - flow-NTC (<130°C)
F.11
Short circuit - return-NTC (<130°C)
F.20
Over heat cut off activated
F.22
Dry fire protection
F.23
Dry fire protection (difference between flow and
return NTC's too large)
F.24
Dry fire protection (temperature gradient of flow NTC too steep). Air in boiler/system, pump blocked or defective, pump
F.27
No demand to gas valve
F.28
Boiler goes to lock out
F.29
Flame extinguished re-ignition unsuccesful
F.32
Main heat exchanger anti freeze protection mode
(837/637 only) due to fan speed deviation too great
F.33
Main heat exchanger anti freeze protection mode
(837/637 only) due to no switching signal from the air pressure switch
F.37
The rotary speed of the fan is too high or too low
defect
(837/637 only)
F.41
No setting for the type of gas is stored
(837/637 only)
F.42
Faulty cable loom
F.43
Faulty cable loom
F.60
Electronic fault
F.61
Electronic fault
F.62
Flame rectification present 4 secs. after gas valve turns off
F.63
EMC fault
F.64
Sensor or electronics fault
F.65
PCB processor temperature too high
F.66
Display fault
F.67
Electronic fault
Table St.2: Fault codes
40
Supplied By www.heating spares.co Tel. 0161 620 6677
• Press the "i" and "-" buttons simultaneously.
• Use the "+" button to scroll back through the list of
memorised errors.
To cancel fault error memory display mode, proceed as
follows:
• Press the "i" button below the display.
or
• Do not touch any key for about four minutes. The
display will now revert back to showing the current
flow temperature.
Displayed values/adjustment values
Flow-NTC cable defective/ broken NTC faulty
Return-NTC cable defective/broken NTC faulty
NTC-plug shorted to casing, NTC defective
NTC-plug shorted to casing, NTC defective
Maximun temperature exeeded
No water in appliance, pump cable defective, pump
blocked or defective, pump output too low
No water in appliance, pump cable defective, pump
blocked or defective, pump output too low
output too low
Electronic board defective; Gas valve defective
No gas; Isufficient gas; Incorrect gas valve
adjustment; Electrode defective; Ignition lead defect;
Electronic igniter defective
Gas supply absent or insufficient
Check fan control cables/connections; Defective fan
control cable;
Check air pressure switch, fan, fan supply or flue
system
Air pressure switch defect; fan defect; electronics
Set gas type in PCB (see page 30)
Faulty or incorrect loom fitted
Faulty or incorrect loom fitted
Electronics defect
Electronics defect
Check gas valve, burner tubes and injectors or
electronics defect
EMC or electronics defect
Check NTC's/connections or electronics defect
Check earth connection or electronics defect
Display defect; fault in the connection to the display;
electronics defect
Electronics defect
Instructions for Installation and Servicing turboMAX plus and thermoCOMPACT R1

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