2 fault detection – Yaskawa J1000 Compact Vector Control Drive User Manual
Page 143
Digital Operator Display
Fault Name
oH3
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminal A1 or A2 exceeded the
alarm detection level.
• Detection requires multi-function analog input H3-02 or H3-10 be set to E.
Cause
Possible Solution
Motor has overheated
• 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 excessively, as 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.
Digital Operator Display
Fault Name
oH4
Motor Overheat Fault (PTC Input)
• The motor overheat signal to analog input terminal A1 or A2 exceeded the
fault detection level.
• Detection requires multi-function analog input H3-02 or H3-10 be set to E.
Cause
Possible Solution
Motor has overheated.
• 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
excessively 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.
Digital Operator Display
Fault Name
oL1
Motor Overload
The electrothermal sensor tripped overload protection.
Note:
The U4-16 value must be less than 100 before oL1 can be reset.
Cause
Possible Solution
5.2 Fault Detection
YASKAWA ELECTRIC TOEP C710606 47C YASKAWA AC Drive – V1000 Quick Start Guide
143
5
Troubleshooting