Midea Mini VRF

MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF
Troubleshooting 67
4.4 E4: T3&T4 sensor malfunction
4.5 E5: Voltage protection malfunction
LED displays E4
Judge: whether the body is broken.
Replace main PCB
Judge: T3&T4 sensor malfunction
Connect the wire again.
YES
NO
Judge whether temperature sensor pin connects
properly.
YES
Connect again.
NO
NO
Replace T3/T4 sensor
YES
LED
displays
E5
Voltage protection malfunction
Judge whether the input voltage is 180-260V
NO
Replace the filter board to check whether the unit operates
normally.
Check the power supply.
YES
Replace the main PCB
YES
OK
NO