AIR2004 01 01
Month of Issue:
Page 1 of 4
Sharp Electronics (UK) Limited
Reference – ARCN-0312-06
Revision - 1
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
All air conditioners
Failure of the IPM (Intergrated Power Module) fitted in the outdoor unit.
If it is suspected that the IPM in the outdoor unit has failed, it can be checked by using
the following proceedure.
This is a gerneral procedure and will only indicate if the module is short circuit or
leaky. It will not indicate if the module is open circuit. If definate confirmation is
requiered it is recommended that the module be replaced.
The pictures below show a typical module and its internal structure (some modules
may differ slightly from this).
Make a note of the readings given between the various terminals as shown on the test
sheet on page 2 of this Technical Bulletin. For each group of readings (A, B, C or D)
the resistance measurement should be in the region of several hundred k
readings within each group should not vary by more that a few tens of k