LG CH Series - Error Code Display

14 Air-to-Water Heat Pump
Owner's instruction
On critical error, the unit will be unconditional stop.
At this time, 'CH' and error code No. keep display by turns.
Critical error
<Display>
Heavy trouble : Compressor cycle trouble
<Display>
Slight trouble : Sensor trouble
<Display>
The error code will be displayed on control panel.
Error code display