130
Troubleshooting
Alarm
Code
03
Abnormal Transmitting between Indoor Units/Water Module and Outdoor Units
● The RUN indicator (Red) is ashing
● The indoor unit number, the alarm code, the unit model code and the connected number of indoor units are displayed on
LCD, or the indoor unit number and the alarm code are displayed on the 7-segment of outdoor unit PCB.
★
When fuses are melted, or the circuit breakers are activated, check the cause of overcurrent and take action.
★
This alarm code is indicated when abnormality continues for 3 minutes after normal transmitting between indoor units and
outdoor units, and also abnormal transmitting continues for 30 seconds after the micro-computer is automatically reset. If
the abnormal transmitting occurs from the rst, the alarm code is indicated after 30 seconds from starting the outdoor unit.
Is LED3 (yellow)
on O.U. PCB ON?
No
No
Yes
Yes
Yes
Is DSW10-1P
(Terminating Resistance)
on O.U. PCB ON?
Is LED1 (red)
on O.U. PCB ON?
Set it correctly.
No
Remove terminals of
#1 and #2 on TB2.
Yes
Reconnect terminals
of #1 and #2 on TB2.
Replace fuse.
No
Check the fuses of
outdoor unit power
supply.
Faulty O.U. PCB
Outdoor
Unit
To Next Page
No
No
Is the fuse for
O.U. PCB melted?
Yes
Yes
Is the voltage between
faston terminal "R1"
and “N1”of O.U. PCB
208V or 230V?
Is DSW10-1P
(Terminating Resistance)
on O.U. PCB ON?
Is "R1" and "N1"on
O.U. PCB loosened?
Connect them correctly.
Yes
No
O.U. PCB: Outdoor Unit PCB
I.U. PCB: Indoor Unit PCB
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