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Why does the controller have the following error code?

Why does the controller have the following error code?

Update Time:2019/3/4
Q:Why does the controller have the following error code?
P0.P43  P46 P49
Automatically remove after 30s
P50 P51
Voltage return to normal,remove the fault immediately
P60
Automatically clear after the temperature is normal
P48
Automatically clear after 30 minutes or re-power to clear
E8  ALARM
restart the power
PL 
At the first 5 times,it will removal after 30 seconds,and then 30 minutes to removal
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