Proportional Valve Feed alarm occurred several times as well as low insulation alarm at UPS (A) box.

What can be the suggested course of troubleshooting?

Main Engine - MAN ME-C

03 Feb '20, 21:10

Feb. 3, 2020, 9:10 p.m.
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Answer:

The proposed investigation route is as follows:

  • trace the problem, check all connections and cables for tightness
  • traced low insulation
  • from the experience, one of the probable causes could be a proportional valve (4/2 way solenoid valve) of a HSU - Pump. Disconnect it and the low insulation alarm should disappear.

The proportional valve may leak and have oil accumulated it a protection cover. If this is the case, it should be replaced at first opportunity.

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03 Feb '20, 21:23

Feb. 3, 2020, 9:23 p.m.
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