Chapter 8 Troubleshooting｜VP3000
520
Motor overheating
(oH3) PT1000
Motor overheating (PT1000) (Pr. H6-03 = 4 PT1000), when PT1000
temperature is > Pr. H6-07 setting value, the fault treatment acts according to
Pr. H6-09.
PT1000 temperature > Pr.06-07 setting
Fault Treatment Parameter
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 is
automatically cleared.
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 PT1000 is properly
set and wired
Check the connection between PT1000 thermistor resistor and the heat
protection.
Check if the setting for stall
prevention is correct
Set the stall prevention to the proper value.
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