Innova Srl
Page 28
N420220A_ManualeHRC_Rev07.EN
7
ALARMS
7.1.1
GENERALITY
In case of problems or breakdowns, contact the installer or the authorized service center.
7.1.2
PROBLEMS RELATED TO THE OPERATION OF THE UNIT
PROBLEM
CAUSE
REMEDIES
The fan does not turn on
-The power supply is not switched on
-The unit control unit does not work
- Wrong electrical connections
-Fans in thermal protection
- Check the power supply on the fan
- Check the control unit and its relative power supply
-Check the operation of the power supply
-Check that the fan impellers are not obstructed
The fan stops unexpectedly
- Fan blades obstructed
- Incorrect motor voltage from the control unit
- Wrong electrical connections
-Fans in thermal protection
- Check the power supply on the fan
- Check the control unit and its relative power supply
-Check the operation of the power supply
-Check that the fan impellers are not obstructed
Insufficient air flow
- Clogged filter, exchanger or grids
- Foreign body inside the pipe
- Problems with the fan blades
-Clean the filters
-Increase the rotation speed
-Clean pipes, exchanger
- Check the fan impellers
Insufficient efficiency of the
exchanger
-Clogged exchanger
- Cycle time set incorrectly
-Clean the surfaces of the exchanger
-Set the cycle time according to the previous indications
Excessive vibration and
noise
-Incorrect installation of the drive
- Incorrect installation of the pipes
- Imbalance of the fan impeller
-Check the unit brackets and fixings
-Check brackets and pipe fasteners
- Check the fan impellers status
Water leaks from the unit
-Installation unit with wrong inclination
- Check the correct installation of the fan unit
7.1.3
PROBLEMS RELATED TO THE OPERATION OF THE CONTROL UNIT OR POWER SUPPLY
PROBLEM
CAUSE
REMEDIES
The fan does not turn on
-Faulty control unit
-Faulty power supply
- Check or replace the control unit
The fan does not change
speed
-Faulty control unit
- Check or replace the control unit
The fan does not change its
operating mode
-Faulty control unit
- Check or replace the control unit