Delta VFD300C43S-HS User Manual page 560

Chapter 14 Fault Codes and DescriptionsC2000-HS
ID* Display on LCM Keypad
6
Action level
Action time
Fault treatment parameter
Reset method
Reset condition
Record
Cause
Malfunction caused by interference
Hardware failure
ID* Display on LCM Keypad
7
Action level
Action time
Fault treatment parameter
Reset method
Reset condition
Record
Cause
Acceleration is too slow (e.g. hen
lifting load decreases acceleration
time)
The setting for stall prevention
level is smaller than no-load
current
Power voltage is too high
ON/OFF switch action of phase-in
capacitor in the same power
system
Regenerative voltage of motor
inertia
Acceleration time is too short
Motor ground fault
Incorrect wiring of brake resistor or
brake unit
Malfunction caused by interference
Fault Name
Over-current or hardware failure in current detection at
Over-current at stop stop.
(ocS) Cycle the power after ocS occurs. If the hardware failure
occurs, the display shows cd1, cd2 or cd3.
Action and Reset
240% of rated current
Immediately act
N/A
Manual reset
Reset in 5 sec. after the fault is cleared
Yes
Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.
Check if other error code such as cd1–cd3 occur after cycling the power. If yes,
return to the factory for repair.
Fault Name
DC BUS over-voltage during acceleration.
Over-voltage during
When ovA occurs, the drive closes the gate of the
acceleration
output, the motor runs freely, and the display shows an
(ovA)
ovA error.
Action and Reset
820V
DC
Immediately act when DC BUS voltage is higher than the level
N/A
Manual reset
Reset only when DC BUS voltage is lower than 90% of the over-voltage level
Yes
Decrease the acceleration time
Use brake unit or DC BUS
Replace the drive with a larger capacity model.
The setting for stall prevention level should be larger than no-load current
Check if the input voltage is within the rated AC motor drive input voltage range,
and check for possible voltage spikes.
If the phase-in capacitor or active power supply unit acts in the same power
system, the input voltage may surge abnormally in a short time. In this case,
install an AC reactor.
Use over-voltage stall prevention function (Pr. 06-01)
Use auto-acceleration and auto-deceleration setting (Pr. 01-44)
Use a brake unit or DC BUS
Check if the over-voltage warning occurs after acceleration stops.
When the warning occurs, do the following:
1. Increase the acceleration time
2. Set Pr. 06-01 over-voltage stall prevention
3. Increase setting value for Pr. 01-25 S-curve acceleration arrival time 2
The ground short circuit current charges the capacitor in the main circuit through
the power. Check if there is ground fault on the motor cable, wiring box and its
internal terminals.
Troubleshoot the ground fault.
Check the wiring of brake resistor and brake unit.
Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.
14-6
Fault Descriptions
Corrective Actions
Fault Descriptions
Corrective Actions