Chapter 8 Troubleshooting｜VP3000
412
Motor overheating
(oH3) PTC
Motor overheating warning.
The AC motor drive detects the temperature inside the motor is too high
Pr. H6-03 = 1 (PTC), PTC input level > Pr. H6-07 (default = 50%)
Warning Setting Parameter
Fault treatment: Pr. H6-09
0: Warning & continue OPER
1: Fault & Ramp to Stop
2: Fault & Auto-Decel
3: Fault & coast to stop
4: Fault & by Quick Stop Time
When Pr. H6-09 = 0 and when the temperature is ≤ Pr. H6-07 level, the oH3
warning is automatically cleared.
It is “Warning” when Pr. H6-09 = 0, which will be automatically reset
The oH3 is “Warning” when Pr. H6-09 = 0. When the temperature is ≤ Pr. H6-07
level, the oH3 warning is automatically cleared.
When the temperature is ≤ Pr. H6-07 level, the oH3 warning is automatically
cleared.
Clear the motor lock status.
Reduce the load.
Replace the motor with a larger capacity model.
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.
Operates at low speed too long
Decrease low-speed operation time.
Change to dedicated motor for the drive.
Enlarge the motor capacity.
Accel./Decel. time and working
cycle are too short
Increase the setting values for Pr. C2-00–Pr. C2-07 (accel./decel. time)
Adjust settings for Pr.E0-03–E0-14 (V/F curve). Adjust 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 PTC is properly set
and wired
Check the connection between PTC thermistor resistor and the heat protection.
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