Yaskawa 600V - Manual (Page 48)

HOA Keypad ALM FLT Cause Possible Solution
Overcurrent
oC
O
The motor has been damaged due to overheating
or the motor insulation is damaged
• Check the insulation resistance.
• Replace the motor.
One of the motor cables has shorted out or there
is a grounding problem
• Check the motor cables.
• Remove the short circuit and reapply power to the drive.
• Check the resistance between the motor cables and the
ground terminal .
• Replace damaged cables.
The load is too heavy
• Measure the current flowing into the motor.
• Replace the drive with a larger capacity drive if the current
value exceeds the rated current.
• Determine if there is sudden fluctuation in the current level.
• Reduce the load to avoid sudden changes in the current level
or switch to a larger drive.
Heatsink Overheat
oH or oH1
O O
Surrounding temperature is too high
• Check the temperature surrounding the drive. Verify
temperature is within drive specifications.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing
excessive heat.
Load is too heavy
• Measure the output current.
• Decrease the load.
• Lower the carrier frequency (C6-02).
Drive Overheat
Warning
oH2
O
An external device triggered an overheat warning
in the drive.
Search for the device that tripped the overheat warning.
Remove the cause of the problem.
Motor Overload
oL1
O
Load is too heavy Reduce the load.
Cycle times are too short during acceleration and
deceleration
Increase the acceleration and deceleration times (C1-01
through C1-04).
A general-purpose motor is driven below the
rated speed with a high load
• Reduce the load.
• Increase the speed.
• If the motor is supposed to operate at low speeds, either
increase the motor capacity or use a motor specifically
designed to operate in the desired speed range.
Drive Overload
oL2
O
Load is too heavy Reduce the load.
Cycle times are too short during acceleration and
deceleration
Increase the acceleration and deceleration times (C1-01
through C1-04).
The output voltage is too high
• Adjust the preset V/f pattern (E1-04 through E1-10) by
reducing E1-08 and E1-10.
• Do not lower E1-08 and E1-10 excessively. This reduces
load tolerance at low speeds.
Overtorque
Detection 1
oL3
O O
Parameter settings are not appropriate for the load Check L6-02 and L6-03 settings.
Fault on the machine side (e.g., machine is
locked up)
Check the status of the load. Remove the cause of the fault.
External HOA Keypad
Connection Fault
oPr
O
External operator is not properly connected to the
drive
• Check the connection between the operator and the drive.
• Replace the cable if damaged.
• Turn off the drive input power and disconnect the operator.
Reconnect the operator and reapply drive input power.
i.8 Troubleshooting
48 YASKAWA ELECTRIC TOEP YAIZ1U 02A YASKAWA AC Drive – Z1000 Safety Precautions