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