YASKAWA V1000 Series Installation & Start-Up Manual page 214

5.5 Fault Detection
Cause
Surrounding temperature is too hot.
Load is too heavy.
The internal cooling fan has reached
its performance life or has
malfunctioned.
Airflow is restricted to the cooling
fan.
LED Operator Display
Cause
Motor has overheated.
Motor has overheated.
Motor has overheated.
LED Operator Display
214
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
• 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.
• Reduce the load.
• Lower the carrier frequency (C6-02).
• Check the maintenance time for the cooling fan (U4-04).
• If U4-04 exceeds 90%, replace the cooling fan.
Replacement on page
• When the fan has been replaced, reset the fan maintenance time
(o4-03 = "0").
• Provide the proper installation space around the drive as indicated in the
manual. Refer to Correct Installation Spacing on page
• Allow for the specified space and ensure there is sufficient circulation around
the control panel.
• Check for dust or foreign materials that may have clogged the cooling fan.
• Clear out debris caught in the fan that inhibits air circulation.
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminal A1 or A2 exceeded the
oH3
alarm detection level.
• Detection requires multi-function analog input H3-02 or H3-10 be set 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). 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.
Motor Overheat Fault (PTC Input)
• The motor overheat signal to analog input terminal A1 or A2 exceeded the
oH4
alarm detection level.
• Detection requires that multi-function analog input H3-02 or
H3-10 be set to "E".
Possible Solution
278.
Fault Name
Possible Solution
Fault Name
Refer to Cooling Fan
40.