YASKAWA A1000 Series - Page 188

Digital Operator Display Fault Name
Internal cooling fan is stopped
• Replace the cooling fan.
•
After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
Digital Operator Display Fault Name
oH1
Overheat 1 (Heatsink Overheat)
The heatsink temperature exceeded the drive overheat level. Overheat level is determined by drive
capacity (o2-04).
Cause Possible Solution
Surrounding temperature is too high
• 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.
Load is too heavy
• Measure the output current.
• Lower the carrier frequency selection (C6-02).
• Reduce the load.
Digital Operator Display Fault Name
oH3
Motor Overheat Alarm (PTC Input)
• 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.
oH4
Motor Overheat Fault (PTC Input)
• 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.
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) 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.
Digital Operator Display Fault Name
<1>
oH5
Motor Overheat (NTC Input)
The motor temperature exceeded the level set to L1-16 (or L1-18 for motor 2)
Cause Possible Solution
Motor has overheated
• Reduce the load.
•
Check the ambient temperature.
<1> Detected in models 4A0930 and 4A1200.
5.2 Fault Detection
188
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide