Delta CFP2000 Series, User Manual

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Chapter 14 Fault Codes and Descriptions

CFP2000
14-6
ID* Display on LCD Keypad Fault Name Fault Descriptions
6
Over-current at stop
(ocS)
Over-current or hardware failure in current detection at
stop.
Cycle the power after ocS occurs. If the hardware failure
occurs, the display shows cd1, cd2 or cd3.
Action and Reset
Action level 240% of rated current
Action time Immediately act
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Reset in 5 sec. after the fault is cleared
Record Yes
Cause Corrective Actions
Malfunction caused by interference Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.
Hardware failure
Check if other error code such as cd1–cd3 occur after cycling the power. If yes,
return to the factory for repair.
ID* Display on LCD Keypad Fault Name Fault Descriptions
7
Over-voltage during
acceleration
(ovA)
DC bus over-voltage during acceleration.
When ovA occurs, the drive closes the gate of the
output, the motor runs freely, and the display shows an
ovA error.
Action and Reset
Action level 820 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 the over-voltage level
Record Yes
Cause Corrective Actions
Acceleration is too slow (e.g. lifting
load decreases acceleration time)
Decrease the acceleration time
Use brake unit or DC bus
Replace the drive with a larger capacity model.
The setting for stall prevention
level is smaller than no-load
current
The setting for stall prevention level should be larger than no-load current
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 acts in the same power
system, the input voltage may surge abnormally in a short time. In this case,
install an AC reactor.
Regenerative voltage of motor
inertia
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
Acceleration time is too short
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
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.
Incorrect wiring of brake resistor or
brake unit
Check the wiring of brake resistor and brake unit.
Malfunction caused by interference Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.