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Clear 34:
Serial communication error between Controller /Interface PCB.
Hydraulic Unit LED:
Green 3 flashes / Red 2 flashes
Outdoor Unit LED:
No flash
Probable causes:
• Misconnection
•
External cause
•
Interface PCB failure
•
Main PCB Failure
Check:
1-1 Stop the system and start it again (disconnection time 1min):
Is the error still displayed?
YES
NO
1-2 Check for external causes:
- Check for any equipment generating harmonic
waves which interfere with the communication
between the Main PCB and the Interface PCB
(Neon light bulb or any electric equipment which
causes harmonic waves)
2 Check the connections:
- Check the connection between the Main PCB
and the Interface PCB
- If there is an abnormal condition, correct it
by referring to Installation manual
Maintenance document "1792 - EN"
- 27 -
Split system single phase type