Technibel iSeries - Page 29

Bad connection
between the outdoor
pcb and the heatsink.
Check that the outdoor pcb is
properly connected to the heatsink
and that the screws on the pcb are
properly mounted with the right
torque. Check that there is enough
thermal paste between the pcb and
the heatsink.
The rear of the outdoor
unit is obstructed.
Remove the obstruction.
6 Automatic
protection against
overheating on the
power electronics
(compressor
module).
Compressor and fan
are stopped.The
system restarts
automatically after
3 minutes.
Incorrect fan operation.
Check that fan works properly.
Power supply surge or
under voltage.
Check the quality of the power
supply.
There is some air or
moisture inside the
refrigerant circuit.
Be sure to have correctly pulled the
vacuum of the system. In case, pull
the vacuum again and recharge the
outdoor unit with the correct amount
of refrigerant.
Damaged compressor. Check windings of the compressor.
Bad earth connection. Check that all the earth cables are
correctly connected.
Fan damaged. Check that fan motors of indoors and
outdoor units work properly.
7 Automatic
protection against
compressor
overcurrent.
Compressor and fan
are stopped.
The system restarts
automatically after
3 minutes.
Lack of refrigerant in
the refrigerant circuit.
Check the refrigerant amount in the
unit, find and repair a possible
leakage and recharge the unit with
the correct refrigerant amount.
8 OCT (Outdoor Coil
Temperature)
sensor fault.
Compressor and fan
are stopped.
The system restarts
as soon as the
sensor is repaired.
Sensor out of order or
disconnected (check
wiring diagram).
Reconnect or replace the sensor.
9 OAT (Outdoor Air
Temperature)
sensor fault.
Compressor and fan
are stopped.
The system restarts
as soon as the
sensor is repaired.
Sensor out of order or
disconnected (check
wiring diagram).
Reconnect or replace the sensor.
10 CDT (Compressor
Discharge
Temperature)
sensor fault.
Compressor and fan
are stopped.
The system restarts
as soon as the
sensor is repaired.
Sensor out of order or
disconnected (check
wiring diagram).
Reconnect or replace the sensor.