Chapter 8 Troubleshooting｜VP3000
515
Motor overheating
(oH3) PTC
Motor overheating (PTC) (Pr. H6-03 = 1 PTC), when PTC input > Pr. H6-07
setting value, the fault treatment acts according to Pr. H6-09.
PTC input value > Pr.H6-09 setting (Default = 50%)
Fault Treatment 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
It is “Warning” when Pr. H6-09 = 0, which will be automatically reset
It is “Fault” when Pr. H6-09 = 1–4, which must be reset manually.
Records when Pr. H6-09 = 1–4 and oH3 displays “Fault”
Clear the motor lock status.
Reduce the load.
Enlarge 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.
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 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 resistor and the heat protection.
Check if the setting for stall
prevention is correct
Set the stall prevention to the proper value.
Unbalance three-phase
impedance of the motor
Use remedies to reduce harmonics.
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