Chapter 14 Fault CodesMS300
569
Motor overheating
(oH3) PTC
Motor overheating (PTC) (Pr.03-00–Pr.03-01 = 6 PTC),
when PTC input > Pr.06-30, the fault treatment acts
according to Pr.06-29.
PTC input value > Pr.06-30 setting (Default = 50%)
Fault Treatment Parameter
Pr.06-29
0: Warn and continue operation
1: Fault and ramp to stop
2: Fault and coast to stop
3: No warning
When Pr.06-29 = 0, oH3 is a “Warning”. The “Warning” is automatically cleared.
When Pr.06-29 = 1 or 2, oH3 is a “Fault”. You must reset manually.
When Pr.06-29 = 1 or 2, oH3 is a “Fault”, and the fault is recorded.
Reduce the load.
Increase the motor capacity.
Ambient temperature is too high
Change the installed place if there are heating devices in the surroundings.
Install/ add cooling fan or air conditioner to lower the ambient temperature.
Motor cooling system error
Check the cooling system to make it work normally.
Operate at low-speed too long.
Decrease low-speed operation time.
Replace the motor with a dedicated to VFD model.
Increase the motor capacity.
Accel./Decel. time and working
cycle are too short
Increase the setting values for Pr.01-12–01-19 (accel./decel. time)
Adjust 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 low, the load capacity
decreases at low speed).
Check if the motor rated current
matches that on the motor
nameplate.
Reset to the correct motor rated current.
Check if the PTC is properly set
and wired.
Check the connection between PTC 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
Use remedies to reduce harmonics.
To Next Page
Loading...
Need help?
General