DM15-01.01.11-01en
Service manual
Multi DC inverter R410A. Outdoor unit
53
Pic 2:IPM or outdoor main PCB (For
M4OD-28HFN1-Q/tri-zone)
Self-Check
Power,
Operating
Self-Check
Operating
Pic 2: IPM or outdoor main PCB (For
M2OD-18HFN1-Q/M4OA-36HFN1-Q/
qui-zone)
Pic 1: check the voltage of N to S
(Vs), is it moving alternately
between positive value and negative
value?