YASKAWA A1000 Series Quick Start Manual page 188

5.2 Fault Detection
Digital Operator Display
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
<1>
Cause
Motor has overheated
<1> Detected in models 4A0930 and 4A1200.
188
• Replace the cooling fan.
• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
Overheat 1 (Heatsink Overheat)
oH1
The heatsink temperature exceeded the drive overheat level. 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 selection (C6-02).
• Reduce the load.
Motor Overheat Alarm (PTC Input)
oH3
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the alarm detection level.
• Detection requires setting multi-function analog inputs H3-02, H3-10, or H3-06 to E.
Motor Overheat Fault (PTC Input)
oH4
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the fault detection level.
• Detection requires setting multi-function analog inputs H3-02, H3-10, or H3-06 to 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) by reducing E1-08 and E1-10.
• Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.
• Check the motor rated current.
• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Motor Overheat (NTC Input)
oH5
The motor temperature exceeded the level set to L1-16 (or L1-18 for motor 2)
• Reduce the load.
• Check the ambient temperature.
Fault Name
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide