31369765EN-07
44
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
9 Troubleshooting
Fault
Possible cause
Required action
Fan motor not functioning
No power supply
Check/restore power supply.
No control signal (EC motors)
Check/restore control signal.
Fan blade blocked
Remove obstruction.
Fan motor burnt
- Check for fan blade obstructions.
- Check thermal protection device.
- Replace fan motor.
Excess motor noise
Defective fan motor bearing
Replace fan motor.
Excess vibrations
Loose fan fasteners
Tighten fasteners.
Unbalanced fan blades
Replace fan blades.
Insufficient capacity
Heat exchanger coil dirty/blocked
Clean coil.
Coil partly blocked by solid ice
- Check defrost cycle settings.
- Check defrost heaters.
- Perform 100% coil defrost to remove all ice.
Fans not (properly) functioning
Check fans.
Refrigerant supply/pressure insufficient
Restore refrigerant supply/pressure to reference values.
Refrigerant leakage
Refrigerant containing parts damaged
- Stop fans.
- Close refrigerant supply.
- Repair leak.
