Delta VFD450CP43S-21 - Page 612

Chapter 14 Fault Codes and DescriptionsCP2000
14-9
ID* Display on LCD Keypad Fault Name Fault Descriptions
10
Over-voltage at stop
(ovS)
Over-voltage at stop
Action and Reset
Action level
230V series: 410 V
DC
460V series: 820 V
DC
575V series: 1116 V
DC
690V series: 1318 V
DC
Action time Immediately act when DC bus voltage is higher than the level
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Reset only when DC bus voltage is lower than 90% of over-voltage level
Record Yes
Cause Corrective Actions
Power voltage is too high
Check if the input voltage is within the rated AC motor drive input voltage range,
and check for possible voltage spikes.
ON/OFF switch action of phase-in
capacitor in the same power
system
If the phase-in capacitor or active power supply unit activates in the same power
system, the input voltage may surge abnormally in a short time. In this case,
install an AC reactor.
Incorrect wiring of brake resistor or
brake unit
Check the wiring of brake resistor or brake unit.
Malfunction caused by interference
Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.
Hardware failure in voltage
detection
Check if other error code such as cd1–cd3 occur after cycling the power. If yes,
return to the factory for repair.
Motor ground fault
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.
ID* Display on LCD Keypad Fault Name Fault Descriptions
11
Low-voltage during
acceleration
(LvA)
DC bus voltage is lower than Pr.06-00 setting value
during acceleration
Action and Reset
Action level Pr.06-00 (Default = depending on the model)
Action time Immediately act when DC bus voltage is lower than Pr.06-00
Fault treatment parameter N/A
Reset method Manual reset
Reset condition
Reset when DC bus voltage is higher than Pr.06-00 + 30V (Frame A–D) / 40V
(Frame E and below)
Record Yes
Cause Corrective Actions
Power-off Improve power supply condition.
Power voltage changes Adjust voltage to the power range of the drive
Start up the motor with large
capacity
Check the power system.
Increase the capacity of power equipment.
The load is too large
Reduce the load.
Increase the drive capacity.
Increase the acceleration time.
DC bus Install DC reactor(s).
Check if there is short-circuit plate
or any DC reactor installed
between terminal +1 and +2
Connect short circuit plate or DC reactor between terminal +1 and +2.
If the error still exists, return to the factory for repair.