Chapter 13 Warning Codes|MH300
V/F voltage is too high
Adjust the settings for Pr.01-01–01-08
(V/F curve), especially the setting
value for the mid-point voltage (if the mid-
point voltage is set too small,
the load capacity decreases at low-speed).
Check if the motor rated
current matches the motor
nameplate
Configure the correct rated current value of the motor again.
Check if the PT100 is properly
set and wired
Check the connection between PT100 thermistor and the heat protection.
Check if the setting for stall
prevention is correct
Set the stall prevention to the proper value.
Unbalanced three-phase
impedance of the motor
Replace the motor.
Harmonics is too high Use remedies to reduce harmonics.