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3  FLOW CHART OF TROUBLESHOOTING 
Service personnel shall collect the malfunction information as much as possible and research them thoroughly, 
list these electrical parts which may cause malfunction, and shall be able to determine the specific reason and 
solve the faulted parts. Observe the status of the complete device and do not observe the partial.   
It is advised to start from the simple operation during analyzing, judging and confirming malfunction reason, 
then conduct the complicated operations such removal of device, part replacement and refrigerant filling.   
Find the malfunction reason carefully as unit may occur several malfunction at the same time and one 
malfunction may develop into several malfunction, so entire system analysis shall be established to make the 
judged result exact and credible.   
3.1  Malfunction display: High Pressure Protection