Haier Smart Power Series Service Manual page 192

PIM temperature protection
Temperature more than 105°C, and continue 5 seconds, then drive shutdown protection.
Compressor startup failure protection
The drive will attempt to start the compressor 5 times, at intervals of 15 seconds. When the drive is making five
times the driving signal cannot normally drive the compressor, for the protection of the relevant parts, compressor
immediately shut down, and the drive will have the compressor drive failure protection.
Limit frequency/shutdown protection
Compressor current protection:
Error protection
Compressor phase current>compressor phase current shutdown
Shutdown
protection current (RMS) , the compressor immediately stop, drive into the
protection
limitedfrequency overcurrent protection.
Compressor phase current>compressor Phase current limit frequency
protection current (RMS) , the compressor will decrease the frequency by
the 2Hz/s rate.
Limit frequency
After compressor decrease the frequency, compressor phase current
protection
limit frequency protection current (RMS) ≥ compressor phase current>
compressor phase current protection recovery current (RMS) , forbid
increase the compressor frequency.
Compressor phase current≤Compressor phase current protection recovery
Protection
current (RMS) , cancel the compressor limit frequency protection and
recovery
normally operation
DC bus over/under voltage protection
Bus voltage>overvoltage shutdown value, the compressor stop, then drive into the bus overvoltage protection.
Bus voltage<overvoltage recovery value, cancel the bus overvoltage protection.
Bus voltage<under voltage shutdown value, the compressor stop, then drive into the bus under voltage protection.
Bus voltage>voltage recovery value, cancel the bus under voltage protection.
Communication error
Drive priority detect the model code after power on. the 30s after power on is the time for the model code setting.
And need to complete the model code setting within this 30s, if setting completely, are not allowed to change
If the model code is not within the model range or the 30s not receive correct communication data, that the
communication failure, execute communications shutdown protection, while communication returns the
corresponding error code.
After the communication failure, if the receiver again to correct data and models within the model code range, then
cancel the error
Note: For debug mode, when the model code is not within the range of models, sentenced to communication
failure; when the model code within the model range, then cancel the error
Protection condition
Compressor type
MNB42FFDMC-L
190
Smart Power
Model code
0x03DF
Error symbol
Limit frequency
protection
Forbid increase
the compressor
frequency