Pioneer YN020GMFI22M2D Service Manual page 56

Multi split system outdoor units/two, three, four and five zones
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IPM board
(for 4-zone)
Bridge rectifier
(for 5-zone)
Remark:
Measure the DC voltage
between + and - port. The
normal value should be
190V~250V.
IPM board
(for 5-zone)

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