MrCool U-match MDUI18024, Руководство по обслуживанию

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MRCOOL Universal Service Manual
46
3.4.19 “P8” Driver Module High Temperature Protection
Error display: ODU mainboard LED displayer
Error judgment condition and method:
If IPM module temperature or PFC module temperature exceeds the set protection value, then it can be
judged that driver module temperature is too high and system will shut down for protection.
Possible reason:
■Thermal grease is not applied or not evenly applied to the module, or there is other substance on the back of the
module.
■The module securing screws are not tightened up.
■Drive board temperature sampling circuit element is damaged or drive chip temperature sampling AD terminal is
abnormal.
Troubleshooting ：
3.4.20 “PA” AC Current Protection
Error display: ODU mainboard LED displayer
Error judgment condition and method:
If input current value exceeds the set protection value, then it can be judged that AC current protection
occurs and system will shut down for protection.
Possible reason:
■System is heavy-loaded and compressor current is too large.
■Grid voltage is abnormal.
■PFC module is damaged.