YASKAWA P1000 Technical Manual page 199

HOA Keypad Display
oH1
Cause
Surrounding temperature is too high
Load is too heavy
HOA Keypad Display
oH3
Cause
Motor has overheated
HOA Keypad Display
oH4
Cause
Motor has overheated
HOA Keypad Display
oL1
Cause
Load is too heavy
Cycle times are too short during acceleration and
deceleration
A general-purpose motor is driven below the rated
speed with a high load
The output voltage is too high
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
Overheat 1 (Heatsink Overheat)
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 (C6-02).
• Reduce the load.
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminals 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.
• 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 and C1-02).
Adjust the preset V/f pattern. Try setting E1-03 to 6.
• 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 Fault (PTC Input)
• The motor overheat signal to analog input terminals 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.
• 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 and C1-02).
Adjust the preset V/f pattern. Set E1-03 to 6.
• 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 Overload
The electronic motor overload protection tripped
Reduce the load.
Increase the acceleration and deceleration times (C1-01 and C1-02).
• Reduce the load.
• Increase the speed.
• If the motor is supposed to operate at low speeds, either increase the motor capacity or use a motor
specifically designed to operate in the desired speed range.
• Adjust the V/f pattern. Set E1-03 to 6.
• Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.
6.4 Fault Detection
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
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