Midea DLCMB - Page 38

Indoor / outdoor units communicaon error
Start: Power off , then Power on the
A/C by the Breaker. (Reconnect the
power wire). Is it sll displaying the
error code?
Yes
No
Change outdoor unit PCB assembly
include wiring
Check wiring on the outdoor and indoor
terminal follow the wiring diagram. Is all
connecng correctly?
Yes
No
Measure Vs, is it moving
alternately between posive value
and negave value? (Vs is the
voltage between S and L2). Refer
PIC 1.
Turn on the indoor unit by
remote. Does the indoor unit display?
Turn off the all indoor units. Is IPM
power LED or operang LED lamp
on Refer to PIC 2.?
Yes
A: Is all the wiring between
terminal and Indoor PCB
connect ok?
No
Yes
A
No
Reconnect the wiring
Yes
No first me
Yes
Yes
Change the Indoor PCB
Power on by remote
controller.
Is it sll
displaying the error code
aer 3 minutes?
Trouble is solved
No second me
No
Yes
Reconnect the wiring
No
change the IPM
No
Is the reactor connecng
well
No Reconnect the wiring
Change Outdoor Main PCB
Yes
No
Is main board
lamp on? Refer PIC 3.
Is indoor unit’s number
correct? Check on the outdoor check
point. The number displayed in check
point inquiry refers to the quantity of
units with a working connection.
Refer to PIC 4.
DLCM(R/H)B: Service Manual