2
9.4 How to Check simply the main part
Troubleshooting
1
Indoor fan does not rotate without feedback
n detection point:
Is the control panel reliably connected with the electromotor? Is it loose? Is the connecting sequence correct?
Is the input voltage within the normal range (measure the voltage between L and N of the wiring block XT with AC voltage gauge.)
Malfunction diagnosis process:
Mai
z
z
Y
Y
Y
N
N
N
Y
N
Energize the
unit and start it
Voltage > 200V?
Voltage between L
and N of indoor
wiring block
Check the
connecting
state of the
connecting terminal
Reliable
connection
Adjust
connecting state
Check power supply
Replace main
board of
indoor unit
remove the
error?
remove the
error?
Replace motor
Finish
Temperature sensor malfunction
Main detection point:
Is outdoor ambient temperature within the normal range?
Is indoor and outdoor fan running normally?
Is the radiating environment inside and outside the unit good enough?
Malfunction diagnosis process:
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