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Error code
1
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 code1
Content
PL
Inverter module temperature protection
PP
Compressor discharge insufficient 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 flash to indicate that the connection has
been re-established. A manual restart is then required before the system can resume operation.
Content
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