HC
PFC protection
Normal protection
Check whether power grid voltage is
normal?
NO
Drive board PFC is damaged ?
YES
Replace the drive board .
YES
3.4.23 ―Lc‖ Startup Failure
Error display: ODU mainboard, IDU wired controller and IDU receive light board will display Lc
Error judgment condition and method:
Check the error code on nixie tube of ODU main control board. If PJ is displayed, it indicates
inverter compressor startup failure
Possible reason:
■Poor contact of compressor UVW wire;
■Compressor is broken;
■Compressor drive board is broken;
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