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.

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

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

Troubleshooting