Midea MSY-09HRDN1-QC8 Service Manual page 40

9.2.4 E3(indoor fan speed out of control) diagnosis and solution
Is the indoor fan motor
connector and
connection good?
Is voltage being
applied to the fan
motor?
(rang 90v-160v
between mid pin and N
9.2.5 E5(Open or short circuit of outdoor ambient or condenser temperature sensor) diagnosis
and solution.
Is the outdoor
temperature sensor
connector and
connection good?
Replace the sensor and
check if E5 display
again?
9.2.6 E6(open or short circuit of indoor room or evaporator temperature sensor) diagnosis and
solution.
Is the indoor temperature
and evaporator sensor
connector and
connection good?
Replace the sensor and
check if E6 display
again?
9.2.7 P0(IGBT over-strong current protection) diagnosis and solution.
YES
NO
YES
YES
NO
YES
NO
Repair the connector and
reconnect
YES
Replace outdoor e-box
NO
Repair the connector and
reconnect
YES
Replace the.indoor PCB
Repair the connector and
reconnect
Indoor PCB is defective.
Replace the indoor PCB.
Replace the indoor fan
motor
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