Operation Manual

12
EG
ERROR
LEDS
OPERATION TIMER STANDBY
POSSIBLE CAUSE SYSTEM BEHAVIOUR SOLUTION
E3
F F F
Communication error between the outdoor unit and the indoor unit
Fan is stopped and flap is closed after 30 seconds of missing communication. The system restarts automatically as soon as the communication is recovered.
Check that connections between C1 and C2 on outdoor and indoor terminal block are correct (C1 terminals connected together, C2 terminals connected together). Check that a shielded communication cable has been used. Check that the dip-switch SW2 for communication address setting is in the correct position. Check that all earth cables are properly connected to every terminal. Check that the shield of the communication cable is properly connected to every terminal. Check the communication fuse on outdoor and indoor unit. Check that the outdoor unit has power supply and that it is working. Check that all PCBs are powered on. Be sure that power supply has not been connected to the communication terminals. Check that there are no burnt signs on the PCBs, in particular close to communication cables. Check that the fan motor is not damaged and it doesn’t create short circuit on the indoor PCB.
O = LED OFF
l
= LED ON F = Flashing LED