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Module protection
DC generatrix low voltage
protection Heat pump syserm
high pressure protection
DC generatrix high voltage
protection Heat pump syserm
high pressure protection
Phase sequence protection
Zero speed protection
MCE malfunction
1. Check the Heat pump system pressure;
2. Check the phase resistance of compressor;
3. Check the U、V、W power line connection sequence
between the inventer board and the compressor;
4. Check the L1、L2、L3 power line connection between the
inventer board and the Filter board；
5. Check the inventer board.
Speed difference >15Hz
protection between
the front and the back clock
Speed difference >15Hz
protection between
the real and the setting speed
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