ERROR
LEDS
OPERATION TIMER STANDBY
POSSIBLE CAUSE SYSTEM BEHAVIOUR SOLUTION
E4
F F O
Defective or not connected indoor coil
temperature sensor.
Fan is stopped and flap is closed.
The system restarts automatically
as soon as the sensor is repaired.
Check that the sensor is properly con-
nected to the PCB as shown in the
electrical wiring diagram.
Check that the sensor is not damaged
and, if necessary, replace it.
E5
F O F
Defective or not connected room air tem-
perature/humidity sensor.
Fan is stopped and flap is closed.
The system restarts automatically
as soon as the sensor is repaired.
Check that the sensor is properly con-
nected to the PCB as shown in the
electrical wiring diagram.
Check that the sensor is not damaged
and, if necessary, replace it.
E6
O F F
Fan motor error. Fan is stopped and flap is closed.
The system restarts automatically
after some seconds.
Check that the fan motor is properly
connected to the PCB as shown in the
electrical wiring diagram.
Check that the fan motor is not locked.
Check that the fan motor is not dam-
aged and, if necessary, replace it.
E8
O F O
Combination between outdoor unit and
indoor units is not correct.
Fan is stopped and flap is closed. Check that you have selected, during
the installation of the system, a proper
combination between outdoor unit and
indoor units.
Check that none of the indoor units of
the system has a communication error.
If present, first solve this error.
NOTE: If the trouble is not solved with the above actions, contact your service centre.
O = LED OFF
l
= LED ON F = Flashing LED
