Error handling
53
11.11
Failure or problems without a message
Below is an overview of failure or problems are shown without a message.
Problem / failure
Reason
Control / Action
Everything out
Power supply
Check the fuse at the control board.
Is the fuse O.K., than the board is
faulty.
No power supply
Power supply has failed.
High supply air
temperatures in summer
Bypass will be closed
Check setting of temperature.
Unusual noises
Bearing of the fan is faulty
Replace the fan.
Slurping noise
Siphon is empty
Siphon does not close
Fill the siphon.
Mount the siphon new.
Whistling noise
somewhere is an air gap
Caulk the air gap.
Condensate leaking
condensate drain is blocked
Clean the condensate drain.
Condensate from intake air and
exhaust air flows back into the device
Mount a siphon before the device in
the pipeline.
Condensate pan under the heat
exchanger damaged or missing
Replace the condensate pan.
Table 6: Overview of failure or problems are shown without a message
