Failure code Failure section
1 defrosting temp. sensor TE circuit
2 outdoor ambient temp. sensor TA circuit
3 compressor suction temp. sensor TS circuit
4 compressor discharging temp. sensor TD circuit
5 mid-condenser temp. sensor TC circuit
6 AC current is overcurrent
7 mutual inductance circuit
8 no meaning
9 IPM protection circuit
10 inner malfunction of control board
11 protection action of compressor discharging temp. (TD)
12 no meaning
13 pressure switch acts
14 no meaning
15 no meaning
16 protection action of compressor suction temp. (TS)
17 no meaning
18 no meaning
19 low frequency, compressor discharging temp. protection action (TD)
20 inner malfunction of control board
21 inner malfunction of control board
22 communication malfunction between indoor and outdoor
23 inner malfunction of control board
When the malfunction occures, the LED on the outdoor unit PCB will display the
failure code directly as follows:
Trouble shooting
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