I'm considering purchasing a Fujitsu ART45LUAK/AOT45LJBYL ducted air
conditioning system which uses a Mitsubishi PS21869-A Intelligent
Power Module chip in the inverter section that drives the compressor.

Here is its datasheet:
http://www.mitsubishichips.com/Globa...9-p(-ap)_e.pdf

I notice that this chip was discontinued by Mitsubishi in Dec 2008.
Could these devices be expected to fail during the reasonable lifetime
of the machine, and would it be a good idea to obtain a spare ahead of
time (57 EUR from http://www.ineltron.de)? The unit has a 5 year
warranty.

I'm also prepared for failures in the ACTPM board which looks like it
might provide an active PFC function. Unfortunately it appears to use
an LACT33020B chip (potted module?) whose identity is a mystery.

Operating manual:
http://www.fujitsugeneral.com.au/ima.../ART45LUAK.pdf

Service manual (pages 8 & 9):
http://www.eserviceinfo.com/download.php?fileid=40291

- Franc Zabkar
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