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27-03-2010, 11:22 AM #1
Fujitsu Split System Outdoor Fan Wiring Issue
Hey all, new to these forums and to messing around with split systems. Am qualified refrig mechanic, but only experienced with transport refrigeration (Thermo King, etc).
Anyways...
I have a Fujitsu split system problem, indoor unit turns on okay, and indoor fan runs okay. However, ventured outside... compressor running, but outdoor fan not running. So no surprises to it having no cooling effect. Removed some covers, made sure fan not seized, etc. Noticed @ the 6 terminal motor starter the Neutral wire is very badly damaged and getting hot whilst running. (Burning smell and insulation previously starting to melt)
Just wondering if motor starters are a common problem in a/c units, like if its an internal fault within the starter itself that would cause such a thing or something like the fan motor capacitor?
Looks like its gotten hot only @ Neutral terminal where it clips onto the starter, i was thinking maybe bad connection causing high resistance therefore caused it to heat up, get hot, and cook the starter?
Probably something simple, i havent really had a go at anything to do with split systems before so any advice would be greatly appreciated.
Also, outdoor unit model AOT30R if that helps at all
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