EN
UAB KOMFOVENT we reserve the right to make changes without prior notice
RHP-C5.1_21-01
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Message
Possible cause
Elimination
Exhaust fan drive
overload
The exhaust fan drive is overloaded.
Check the condition of the exhaust fan drive
and its cooling.
Exhaust fan motor
failure
The exhaust fan is broken.
Check the exhaust fan and replace it if
necessary.
Exhaust fan motor
overload
The exhaust fan is overloaded.
Check the condition of the exhaust fan and
make sure that the resistance of the ventila-
tion system is not exceeded.
Rotor drive failure
A fault signal has been received from the
rotor drive.
Check the rotor drive and its messages.
Rotor drive overload
The rotor drive is overloaded.
Check the condition of the rotor drive and
its cooling.
Rotor motor failure
The rotor motor is broken.
Check the rotor motor and replace it if neces-
sary.
Rotor motor overload
The rotor motor is overloaded.
Check the condition of the rotor motor and
make sure that the rotor is not blocked.
Communication error
No communication with the internal com-
ponents of the air handling unit (controller
extension modules, frequency converters,
fans, etc.) or one / several of them are
broken.
Check internal connections and functioning
of separate components.
Controller failure
Main controller module fault.
Replace the main controller.
The emergency protection of the electrical heater against overheating can be
reset with the RESET button only if the cause of the overheating of the heater has
been clarified and eliminated.
If the unit is shut down and a failure text message is shown on the control panel,
the fault must be eliminated!
Before performing any jobs inside the unit make sure that the unit is stopped and
disconnected from the electrical power supply.
After failure has been eliminated and power supply connected the error messages should be de-
leted. However if the failure has not been eliminated, unit either starts operating and after some time it
stops again, or it does not operate and failure message is indicated.
