Technibel iSeries Technical Data & Service Manual page 28

3 Error on the indoor
unit.
4 Automatic
protection against
overheating on the
power electronics
(fan motor
module).
5 Automatic
protection against
fan motor
overcurrent.
Communication fuses
blown.
Indoor unit not
powered on.
Outdoor or indoor unit
pcb out of order.
Compressor damaged.
Compressor and fan An error occurred on
are stopped. the indoor unit.
The system restarts
automatically as
soon as the error
on the indoor unit is
solved.
Compressor and fan Bad connection
are stopped. between the fan
The system restarts motor's module and the
automatically after heatsink, or missing fan
3 minutes. module's heatsink.
The rear of the outdoor
unit is obstructed.
Incorrect fan operation. Check that fan works properly.
Compressor and fan Fan motor
are stopped. disconnected.
The system restarts
Fan motor blocked /
automatically after
obstructed.
3 minutes.
Fan motor damaged.
Outdoor pcb damaged.
Check the communication fuse on
outdoor unit.
Check the communication fuse on
indoor unit (only certain models).
Check that the indoor unit has power
supply and that the unit is working.
Check that all the pcbs are powered
on.
Be sure that power supply has not
been connected to the
communication terminals.
Check that there are no burnt signes
on the pcbs, in particular close to
communication cables.
Check that there is no continuity
between the phases of the
compressor and the earth (dielectric
strength).
Follow specific indoor unit
troubleshooting.
Check that the fan motor module is
properly connected to the heatsink
and that the screws on the module
are properly mounted with the right
torque. Check that there is enough
thermal paste between the fan
module and the heatsink.
Remove the obstruction.
Check the fan motor connector.
Remove the obstruction.
Check if the fan motor starts. If it
does not start correctly, change the
fan motor.
Only if the error is recurrent, change
the outdoor pcb.