Airxcel Mach 8 15K AC unit

Question

Need some help from the AC experts. I need to know if this unit has a compressor start capacitor. Looking at the diagram on the cover it looks optional but there is a small capacitor in the compartment that could be for the fan start? It is wired through the run capacitor and has a what looks like a PTCR wired in line. Any help would be greatly appreciated! Thanks Chino

dougrainer · Answer

ALL AC units have a Comp Start Capacitor. Even the Mach 8. Now, RVP offers an optional HARD START capacitor for certain OEM's, usually Towable Makers. Doug
Page 8 of this link will show the Start and run capacitors for the compressor. Remember, this unit has 2 fan motors instead of 1. So it has 2 Motor capacitors.
http://old.rvcomfort.com/rvp/pdf_documents/1976665.pdf

chinolbz · Answer

Thanks dougrainer. The wiring diagram shows 4 caps but mine only has two. I am adding a Micro-air soft start and need to disconnect the start cap if it has one. A large run cap and a smaller one tied to the run cap with what looks like a PTCR. Chino

hank_mi · Answer

The small cap with the PTCR is the start cap. The fan run cap would not be tied to the compressor run cap, the start cap would.

dougrainer · Answer

Chinolbz wrote:Thanks dougrainer. The wiring diagram shows 4 caps but mine only has two. I am adding a Micro-air soft start and need to disconnect the start cap if it has one. A large run cap and a smaller one tied to the run cap with what looks like a PTCR. ChinoI should have mentioned, "some" of the Mach 8 compressors have a built in capacitor. NOT a replaceable part. Doug

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Airxcel Mach 8 15K AC unit

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