Earth fault alarm occurred on ECS ACU and ME shutdown.

What may be the probable cause of this alarm?

23 Jan '20, 23:17

Jan. 23, 2020, 11:17 p.m.
KnowledgeBase's gravatar image


Check HCU unit, solenoid valves wiring.

It had been an issue with oil leaking and accumulating in the protective cover of proportional control valve solenoid cover. If that is the case, the replacement of proportional control valve may be required.

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23 Jan '20, 23:29

Jan. 23, 2020, 11:29 p.m.
cheng's gravatar image

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