Operating Instructions

Fault Codes
Digital Keypad
336 | 443
Check for possible burnout or aging
insulation of the motor
Check the motor insulation value with megger. Replace the motor if the insulation is poor.
Malfunction caused by interference
Verify the wiring of the control circuit and the wiring/grounding of the main circuit to prevent
interference.
The length of motor cable is too long
● Increase the AC motor drive’s capacity.
● Install AC reactor(s) on the output side (U/V/W).
Hardware failure
The Aoc occurs due to the short circuit or ground fault at the output side of the drive. Check for
possible short circuits between terminals with the electric meter:
B1 corresponds to U, V and W; DC- corresponds to U, V and W; corresponds to U, V and W.
If short circuit occurs, return to the factory for repair.
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
80
V-phase over-current
before run (boc)
V-phase short circuit detected when the output wiring detection is
performed before the drive runs.
Action and Reset
Action level
300% of the rated current
Action time
Immediately act
Fault treatment parameter
N/A
Reset method
Manual reset
Reset condition
Reset in five seconds after the fault clears
Record
Yes
Cause
Corrective Actions
Incorrect wiring for the motor
Check if the motor’s internal wiring and the UVW wiring of the drive output terminal are correct.
Short-circuit at motor output due to poor
insulation wiring
Check the motor cable and remove causes of the short circuits, or replace the cable before turning
on the power.
Check for possible burnout or aging
insulation of the motor
Check the motor insulation value with megger. Replace the motor if the insulation is poor.
Malfunction caused by interference
Verify the wiring of the control circuit and the wiring/grounding of the main circuit to prevent
interference.
The length of motor cable is too long
● Increase the AC motor drive’s capacity.
● Install AC reactor(s) on the output side (U/V/W).
Hardware failure
The boc occurs due to the short circuit or ground fault at the output side of the drive. Check for
possible short circuits between terminals with the electric meter:
B1 corresponds to U, V and W; DC- corresponds to U, V and W; corresponds to U, V and W.
If short circuit occurs, return to the factory for repair.
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
81
W-phase over-current
before run (coc)
W-phase short circuit detected when the output wiring detection is
performed before the drive runs.
Action and Reset
Action level
300% of the rated current
Action time
Immediately act
Fault treatment parameter
N/A