Midea mcd-24hrdn1 - Page 220

Troubleshooting
210 Electrical Control System
2.4.2.6. E4 malfunction
Judge 1: Outdoor condenser temp. sensor (T3) is malfunction
E4 display
No
No
Replace condenser temp. sensor(T3)
Check whether the wiring of the
condenser temp. sensor(T3) is
broken off
Check whether the resistance of
condenser temp. sensorT3) is
wrong refer to the Appendix 1
Yes
Connect the wiring well
Yes
Judge 2: Outdoor ambient temp. sensor (T4) is malfunction
No
Replace outdoor ambient
temperature sensor (T4)
Check whether the wiring of the
outdoor ambient temperature
sensor (T4) is broken off
Check whether the resistance of
outdoor ambient temperature
sensor (T4) is wrong refer to the
Appendix 1
Yes
Connect the wiring well
Yes
No
Replace outdoor main PCB