YASKAWA A1000 Series Quick Start Manual page 105

Cause
Surrounding temperature is too high.
Load is too heavy.
Internal cooling fan is stopped.
Digital Operator Display
Cause
Surrounding temperature is too high.
Load is too heavy.
Digital Operator Display
Cause
Motor has overheated.
Digital Operator Display
Cause
Load is too heavy.
Cycle times are too short during
acceleration and deceleration.
A general purpose motor is driven below
the rated speed with too high load.
The output voltage is too high.
The wrong motor rated current is set to E2-
01.
The maximum output frequency is set
incorrectly.
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
• 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.
• Measure the output current.
• Decrease the load.
• Lower the carrier frequency (C6-02).
• Replace the cooling fan.
• After replacing the drive, reset the cooling fan maintenance parameter (o4-03 = 0).
Overheat 1 (Heatsink Overheat)
oH1
The temperature of the heatsink exceeded the drive overheat level. The overheat level is determined
by drive capacity (o2-04).
• Check the temperature surrounding the drive.
• 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.
• Measure the output current.
• Lower the carrier frequency (C6-02).
• Reduce the load.
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the alarm detection
oH3
level.
• Detection requires multi-function analog input H3-02, H3-06, or H3-10 be set to "E".
Motor Overheat Fault (PTC Input)
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the fault detection
oH4
level.
• Detection requires that multi-function analog input H3-02, H3-06, or H3-10 = "E".
• Check the size of the load, the accel/decel times, and the cycle times.
• Decrease the load.
• Increase the acceleration and deceleration times (C1-01 through C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). This will mainly involve reducing E1-08 and
E1-10. Be careful not to lower E1-08 and E1-10 too much because this reduces load tolerance at
low speeds.
• Check the motor rated current.
• Enter the motor rated current as indicated on the motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Motor Overload
oL1
The electronic motor overload protection tripped.
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-08).
• 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.
Adjust the user-set V/f patterns (E1-04 through E1-10). Parameters E1-08 and E1-10 may need to be
reduced. Be careful not to lower E1-08 and E1-10 too much because this reduces load tolerance at
low speeds.
• Check the motor-rated current.
• Enter the value written on the motor nameplate to parameter E2-01.
• Check the rated frequency indicated on the motor nameplate.
• Enter the rated frequency to E1-06 (Base Frequency).
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
5 Troubleshooting
5
105