VII. Troubleshooting
Caution: Make sure power is disconnected from the unit before connecting or disconnecting any port/connector on
the PC board to avoid any potential damage.
Table 33 - Troubleshooting Codes
Code Definition
0E0 Communication error between ODUs (Displayed on the follower unit only)
0E2 Communication error between ODU and IDU
0E4 T3 or T4 temperature sensor error
0E5 Voltage protection
0E8 Incorrect ODU address
10H0 20H0 Communication error between main control chip and compressor drive chip
0H1 Communication error between main control chip and communication chip
0H2/0H3 Incorrect number of ODUs (Displayed on the header unit only)
0H7 Incorrect number of IDUs
0H8 High pressure sensor error
0Hb Low pressure sensor error
10F1 20F1 PTC error
0F3 Temperature sensor (T5) error
0F4 Temperature sensor (T6) error
0F5 Temperature sensor (T7) error
0F6 Electronic expansion valve error
10Hd 20Hd Follower unit error
0P1 Current leakage, Discharge temperature switch or High pressure protection
0P2 0H5 Low pressure protection
0P3 Over current protection for compressor
0P4 0H6 Discharge temperature protection
0P5 High temperature protection for pipe temperature
0P9 0H9 DC fan protection
0PL 0C7 High module temperature protection
L0~L9 10H4/20H4 Compressor INV module protection
A tL Ambient temperature limit operation
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