Midea MOU-36HN1-R - Page 122

Troubleshooting MCAC-UTSM-2008-11
120 Outdoor Units
E5: Temperature sensor error of water pump
E6: Outdoor unit malfunction
E5
Whether the resistance of the temp. sensor is 10K
Replace temp. sensor
No
Yes
Replace the PCB
E6
Whether the outdoor unit is power on
Measure whether the voltage of the communication line’s red and black end
between the indoor and outdoor unit is +5V
Replace the PCB
Replace the outdoor unit
board
No
Yes
Check the indoor unit main board CN5 or replace the main control board
Yes
Check when the power is on
No
Yes