Operating Instructions

Fault Codes
Digital Keypad
347 | 443
Reset method
Auto
When Pr.14-77=1 or 3, ot4 is a “Warning”. The warning is automatically cleared when
the output current < Pr.14-78.
Manual
When Pr.14-77=2 or 4, ot4 is a “Fault”. You must reset manually.
Reset condition
Immediately reset
Record
Pr.14-77=2 or 4, ot4 is a “Fault”, and the fault is recorded.
Cause
Corrective Actions
Incorrect parameter setting
Configure the settings for Pr.14-78 and Pr.14-79 again.
Mechanical failure (e.g. over-torque,
mechanical lock)
Remove the causes of malfunction.
The load is too large
Reduce the load.
Replace the motor with a larger capacity model.
Accel./ Decel. time and working cycle are
too short
Increase the setting values for Pr.01-12–Pr.01-19 (accel./ decel. time)
V/F voltage is too high
Adjust the V/F curve (Motor 4, Pr.01-63–01-70), especially the setting value for the mid-point
voltage (if the mid-point voltage is set too low, the load capacity decreases at low speed).
The motor capacity is too small
Replace the motor with a larger capacity model.
Overload during low-speed operation
● Decrease low-speed operation time.
● Increase the motor capacity.
Torque compensation is too large
Adjust the torque compensation (See Pr.07-75 torque compensation gain) until the current
reduces and the motor does not stall.
Improper parameter settings for speed
tracking function (including restart after
momentary power loss and restart after
fault)
1. Correct the parameter settings for speed tracking.
2. Start the speed tracking function.
3. Adjust the maximum current for Pr.07-09 speed tracking.
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
134
Internal communication
error (EoL3)
Electronic thermal relay 3 protection. The drive coasts to stop once
it activates.
Action and Reset
Action level
Start counting when output current > 105% of the motor 3 rated current.
Action time
Pr.14-81 (If the output current is larger than 105% of the motor 3 rated current again within 60
sec., the counting time reduces and is less than Pr.14-81)
Fault treatment parameter
N/A
Reset method
Manual reset
Reset condition
Reset in five seconds after the fault is cleared
Record
Yes
Cause
Corrective Actions
The load is too large
Reduce the load.
Accel. /Decel. time or the working cycle
are too short
Increase the setting value for Pr.01-12–01-19 (accel./ decel. time)
V/F voltage is too high
Adjust the settings for Pr.01-54–01-61 (V/F curve), especially the setting value for the mid-point
voltage (if the mid-point voltage is set too low, the load capacity decreases at low speed).
Overload during low-speed operation.
When using a general motor, even it
operates below rated current, an overload
● Decrease low-speed operation time.
● Replace the drive with a dedicated to VFD model.