Midea MS9V-09HRDN1-QC2 9V Series, Руководство по обслуживанию

Страница: 44 / 46

42
9.2.4 E3 (indoor fan speed out of control) diagnosis
9.2.5 E5/E6(Open or short circuit of temperature sensor) diagnosis and solution.
Is the indoor fan motor connector and
connection good?
The unit does not work normally
Turn off the unit, rotate the cross fan.
Does it rotate freely?
NO Disassemble the connection between fan
and motor, check if the bearing is normal.
If not, change the bearing. If yes, follow
the below step.
Replace the fan motor
YES
Replace the indoor PCB
NO
YES
Check the voltage between the red and
black wires of motor power input .Is it in
range of AC90-160V?
YES
Shut off the power supply and turn on it 5s later
YES
Replace outdoor PCB
YES
Check the connections between the
sensors and the PCB. Are the
connections good?
Replace the sensor and check if the
errors happen again?