Midea DLCMB - Page 56

Voltage protection
Check the outdoor unit’s power
supply voltage. Is the voltage between
L (L1) and N (L2) (about 187~264VAC).
Check the power supply
Check whether the voltage of IPM
board P and N(GND) is normal?
DC277—356V for 2-zone(18K Btu/h)/3
zone(27K Btu/h)
DC277-410V For 4-zone(36K Btu/h)/5-
zone(48K Btu/h)
Replace bridge rectifiers,
and then check whether the
system can run normally
(for
5-zone)
Replace IPM board, and
then check whether the
system can run normally
Replace outdoor main board
Yes
No
No
No
No
Yes
Problem solved
Yes
Yes
DLCM(R/H)B: Service Manual