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Error code1Content
H7 Number of indoor units detected by master unit not same as number set on main PCB
H8 High pressure sensor error
H9 P9 protection appears ten times in 120 minutes
yHd Slave unit malfunction
C7 PL protection appears three times in 100 minutes
P1 Discharge pipe high pressure protection
P2 Suction pipe low pressure protection
xP3 Compressor current protection
P4 Discharge temperature protection
P5 Outdoor heat exchanger temperature protection
P9 Fan module protection
Error code1Content
PL Inverter module temperature protection
PP Compressor discharge insufcient superheat protection
xL0 Inverter module protection
xL1 DC bus low voltage protection
xL2 DC bus high voltage protection
xL4 MCE error
xL5 Zero speed protection
xL7 Phase sequence error
xL8 Compressor frequency variation greater than 15Hz within one second protection
xL9 Actual compressor frequency differs from target frequency by more than 15Hz protection
Notes:
1. 'x' is a placeholder for the compressor system (compressor and related electrical components), with 1
representing compressor system A and 2 representing compressor system B. 'y' is a placeholder for the
address (1 or 2) of the slave unit with the error.
2. For some error codes, a manual restart is required before the system can resume operation.
3. Once the EXV has been connected properly, the error code will ash to indicate that the connection has
been re-established. A manual restart is then required before the system can resume operation.
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