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Have you set the
motor type?
Is the load too heavy?
Does an electronic thermal
relay fault occur?
Does an external thermal
relay fault occur?
Set the motor (Pr. 71).
Perform offline auto tuning
(Pr. 71, Pr. 80, Pr. 81, Pr. 83,
Pr. 84, Pr. 96) or enter the motor
constants (Pr. 90 to Pr. 94).
Lighten the load or increase
the inverter and motor
capacities.
The possible cause is a
motor fault.
Check the balance in V/F
control without a motor.
The motor generates
heat abnormally.
Are the inverter output
voltages (U, V, W) balanced?
Lighten the load.
Check the setting of the external thermal
relay.
Input the rated current value at 50Hz.
Check the motor setting of Pr. 71.
Lighten the load.
Please contact your sales
representative.
Is the fan for SF-THY,
SF-VH running?
Is the SF-THY, SF-VH, SF-LHA
or SF-LHCA,
Blue Max
®
2000 (NA) used?
Is the Mitsubishi dedicated
motor(SF-THY, SF-VH) used?
Check the wiring of the
power supply for SF-THY,
SF-VH fan.
Also check for dust
accumulated in the wind
tunnel section of the fan.