Failure: the suction pressure is too high reasons: 1, 2 refrigerant excess heat load is too large 3, expansion valve 4 improper, improperly installed thermal package 5, 6 compressor displacement reduction, oil separator oil return malfunction failure Remedy: 1, 2 release excess refrigerant, adjust the load 3, 4 properly adjusted, re-bandaging 5, check valve maintenance, repair or replacement of six, repair or manually check the oil return faults: oil pressure drops quickly reasons: 1 , oil filter clogging 2, oil is less than 3, 4 oil spills, crankcase oil mixed with liquid refrigerant 5 (foaming) oil pump suction foam 6, oil emulsion deterioration troubleshooting methods: 1. Remove Cleanup 2, supplement 3, after checking trap 4, 5 out of the refrigerant, oil change maintenance equipment refrigeration equipment maintenance | Maintenance | Snow Dragon cooling provided by the Dongguan City-long Refrigeration Electrical and Mechanical Equipment Engineering Co., Ltd .. Dongguan City-long Refrigeration Electrical Equipment Engineering Co., Ltd. (www.dgxuelong.com) strong, credible, in Dongguan, Guangdong heat exchangers, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead XUELONG refrigeration and you hand into the brilliant, for a better future!