Midea MRBT-60CWN1-D - Troubleshooting: Compressor and Sensor Errors

MCAC-RTSM-2015-01 60Hz R410a ClimaMaster Tropical Rooftop Package Unit
71
E0：Compressor phase sequence error or phase default
1) E1：Outdoor coil temp. sensor T3 default.
Yes
No
Yes
Yes
No
No
Detect if the temp. Sensor is normal.
Cut off power supply, replace the
power wire, inspect again.
Detect if the voltage of 5p wire joint
between A, B and C is normal.
Cut off power supply, exchange
freely two wires between A, B and
C. Power on again, if the main
board display E0.
Detect if the main board voltage
between A, B and C is normal.
Cut off power supply, exchange the
wire from main power supply to main
board. Power on again, retesting.
Replace the main board.
OK.
Replace the main board.
Yes
No
Replace the temp. sensor, detect
it again.