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14 P.C. BOARD EXCHANGE PROCEDURES
■ Outdoor Unit
14-1. Replacement of outdoor P.C. board
※Before replacing P.C. board, turn off the power supply of the outdoor unit.
Immediately after turning off the power of the outdoor unit, the electrolytic capacitors inside the
unit will still have a high voltage, and there is a risk of electric shocks. Therefore, wait at least 5
minutes after turning off the power before starting the replacement procedure.
Using a voltmeter as shown below, confirm that the P.C. board (Compressor) voltage between
(+) and (-) (of IPM Q201) is 10VDC or less.
P.C. Board for Compressor (MCC-1683)
IPM (Q201)
Expanded view of IPM
(+) of IPM
10V. DC
+ -
(-) of IPM