Technibel iSeries Technical Data & Service Manual page 29

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