MCAC-UTSM-2009-03 Troubleshooting
Outdoor Units 33
10.2 Outdoor Unit Malfunction
No. LED1 LED2 LED3 Malfunction
1 ☆ × ☆ In-outdoor unit communication malfunction
2 × ☆ ☆ T3 condenser pipe temp. sensor malfunction
× Extinguish, Flash ☆
1. LED1 and LED3 flash
LED1 and LED3 flash
In-outdoor unit communication malfunction
Judge 1: Check whether the wiring of communication line is break off
Yes
Connect the wiring well
Judge 2: Check whether the wiring of L, N and S is wrong
No
Connect the wiring of L, N and S rightly
Replace the PCB
Yes
No
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