377
Troubleshooting
Alarm code
80
Transmission failure between Indoor unit and Master Controller
● Alarm code is displayed on the master controller/ the 7-segment of O.U. display PCB / the 7-segment of I.U. PCB1.
● Alarm code is displayed when there is no communication between indoor unit PCB1 and the Master Controller for 5
minutes.
● Reset the unit to release the alarm.
Controller
PCB4 PCB1
A
TB4-A CN1-3
B
TB4-B CN1-4
Are the connections
between I.U. PCB1
and Master Controller
correctly connected?
Yes
Check wiring: repair broken / wrong wiring
No
Faulty Master Controller
or I.U.PCB (Check it)
Contact your local dealer
PCB5
AC-L
PCN50-1
AC-N PCN50-3
Controller
Yes
Only for
Hi-Therma
Split
Check wiring: repair broken / wrong wiring
No
To Next Page
