Midea MRBT-100CWN1-D - Page 77

60Hz R410A ClimaMaster Tropical Rooftop Package Unit MCAC-RTSM-2015-01
76
5) Outdoor fan motor didn’t run.
6) Four ways valve didn’t work.
No
Yes
Yes
No
Yes
Yes
No
Yes
No
Yes
No
Yes
No
No
No
Detect if the voltage of compressor which
corresponds to the interface on PCB is 208 ~ 230V
AC between CN6 of OFAN1,OFAN2 and N.
Replace
transformer.
Detect if the fuse on PCB is burned off.
If the outdoor fan motor contactor is
close.
Replace outdoor
fan motor.
Replace
contactor.
Replace
fuse.
Check if the secondary voltage
transformer is normal.
Replace PCB.
Replace
transformer.
Detect if the voltage is 208 ~ 230V AC
between CN28, CN29 and C on PCB.
Replace four way valve or coil.
Detect if the fuse on PCB is burned off.
Check if the secondary voltage
transformer is normal.
Replace
fuse.
Replace
PCB.