GMV5 Home DC Inverter Multi VRF Units
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4.2.12. Analysis of drive control system faults
When the unit fails and halts, first check the dual-8 digit nixie tube of main control board and
fault table to find out the specific fault. Then check and solve the fault according to the following
methods.
1) Communication failure between the compressors drive board and control board (outdoor
fault C2)
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