Midea MRBT-60CWN1-D - Troubleshooting: Fan, Compressor, and Sensor Issues (6.2 ton+)

60Hz R410A ClimaMaster Tropical Rooftop Package Unit MCAC-RTSM-2015-01
74
For 6.2ton and above
Item
Content
Error code
1
Indoor fan motor didn’t run.
--
2
Compressor didn’t run.
--
3
T3 temp sensor error.
EA
4
Check if the low pressure protection is normal.
--
5
Outdoor fan motor didn’t run.
--
6
Four ways valve didn’t work.
--
7
Condenser high temp protection.
P8,P9
1) Indoor fan motor didn’t run.
The first check if the power supplier is normal, if all wire connection terminal is loose, if the wired controller set
and wire connection are correct, operating as flow process after confirm.
Yes
No
No
Yes
Yes
No
Yes
No
Yes
No
If the heating mode is in preventing cold
state for a long time (Cooling mode will not
be considered)
Detect if the voltage of the fan on PCB
which corresponds to the interface is 208 ~
230V AC between CN6 of INFAN and N.
Replace T2 sensor or check if exist
leakage in pipeline.
If the indoor fan contactor is close.
Replace motor.
Replace contactor.
Detect if the fuse on PCB is burned off.
Replace fuse.
Check if the secondary voltage
transformer is normal.
Replace PCB.
Replace
transformer.