Fault action

1 Display fault

2 Stop all outputs except water pump

Fault handling

This function is only available for three-phase machines

1 The current is too high. Check whether the condenser ventilation and heat dissipation and water flow are good

2 Is the ambient temperature higher than 43℃ when cooling and higher than 24℃ when heating

3 Check the AC contactor and thermal overload relay

4 Is the compressor reversed? Are the OFL/COM plug and wiring reliable?