Appendix
52
Installation and maintenance instructions auroCOMPACT 0020181589_04
Status code
Meaning
S.34
Frost protection mode active.
S.35
Unit in waiting period because of fan block due to speed being too high or too low.
S.36
Controller target value constantly < 20 °C, the external controller is blocking heating mode.
S.37
Fan speed deviation in operation too high.
S.39
The burner's stop contact (e.g. safety thermostat for underfloor heating or condensate pump) has been triggered.
S.40
Operation in comfort protection mode: Unit in operation, limited heating comfort.
S.41
Water pressure > 2.8 bar.
S.42
Feedback from the flue non-return flap is blocking burner operation (only in conjunction with a multi-functional module) or
condensate pump defective, heat requirement being blocked.
S.46
Operation in comfort protection mode, flame goes out at minimum load.
S.53
Unit in waiting period due to modulation block/operation block as a result of low water pressure (spread between flow
and return too high).
S.54
Unit in waiting period due to operation block as a result of low water pressure (temperature gradient).
S.57
Waiting mode, operation in comfort protection mode.
S.58
Burner modulation due to noise emission/wind.
S.59
Waiting period: Minimum water circulation volume not achieved.
S.61
Gas family check unsuccessful: The coding resistance on the PCB does not match the entered gas group (see also
F.92).
S.62
Gas family check unsuccessful: CO/CO
₂
values at limit. Check combustion.
S.63
Gas family check unsuccessful: Combustion quality outside permissible range (see F.93). Check combustion.
S.76
System pressure too low. Top up water.
S.92
Flow rate sensor test running, heating demands are blocked.
S.96
Return sensor test running, heating demands are blocked.
S.97
Water pressure sensor test running, heating demands are blocked.
S.98
Flow/return sensor test running, heating demands are blocked.
S.105
Low heating flow rate, carry out purging P00 again. (Proklima)
E
Overview of fault codes
Code
Meaning
Cause
F.00
Flow temperature sensor interruption
NTC plug not plugged in or has come loose, multiple plug on the PCB
not plugged in correctly, interruption in cable harness, NTC defective
F.01
Return temperature sensor interruption
NTC plug not plugged in or has come loose, multiple plug on the PCB
not plugged in correctly, interruption in cable harness, NTC defective
F.02
Cylinder charging sensor fault
NTC defective, NTC cable defective, defective plug connection on NTC
F.03
Cylinder sensor fault
NTC defective, NTC cable defective, defective plug connection on NTC
F.10
Flow NTC short circuit
NTC defective, short circuit in cable harness, cable/casing
F.11
Return NTC short circuit
NTC defective, short circuit in cable harness, cable/casing
F.12
Cylinder charging sensor short circuit
NTC defective, short circuit in cable harness, cable/casing
F.13
Cylinder sensor short circuit
NTC defective, short circuit in cable harness, cable/casing
F.20
Safety switch-off: Temperature limiter
Incorrect earth connection between cable harness and product, flow or
return NTC defective (loose connection), black discharge via ignition
cable, ignition plug or ignition electrode
F.22
Safety switch-off: Low water pressure
No or insufficient water in the product, water pressure sensor defective,
cable to pump or water pressure sensor loose/not connected/defective
F.23
Safety switch-off: Temperature difference too
great
Pump blocked, insufficient pump output, air in product, flow and return
NTC connected the wrong way round
F.24
Safety switch-off: Temperature rise too fast
Pump blocked, insufficient pump output, air in product, system pressure
too low, non-return valve blocked/incorrectly installed
F.25
Safety switch-off: Flue gas temperature limiter
(accessory for Austria) or other safety compon-
ents on the pre-fitted plug on X20
Break in plug connection for optional flue gas safety temperature limiter
(STB), break in cable harness
F.26
Fault: Gas valve without function
Gas valve stepper motor not connected, multiple plug on the PCB not
plugged in correctly, interruption in cable harness, gas valve stepper
motor defective, electronics defective
