YASKAWA iQpump1000 - Page 185

HOA Keypad Display Fault Name
oH
Heatsink Overheat
The heatsink temperature exceeded the overheat pre-alarm level set to L8-02.
Cause Possible Solution
Surrounding temperature is too high
• Check the temperature surrounding the drive. Verify temperature is within drive specifications.
• 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.
• Decrease the load.
• Lower the carrier frequency (C6-02).
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.
HOA Keypad Display Fault Name
oH1
Overheat 1 (Heatsink Overheat)
The heatsink temperature exceeded the drive overheat level.
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 (C6-02).
• Reduce the load.
HOA Keypad Display Fault Name
oL1
Motor Overload
The electronic motor overload protection tripped
Cause Possible Solution
Load is too heavy Reduce the load.
Cycle times are too short during
acceleration and deceleration
Increase the acceleration and deceleration times (C1-01 through C1-04).
A general-purpose motor is driven below
the rated speed with a high load
• 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.
The output voltage is too high
• Adjust the user-set 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.
The wrong motor rated current is set to
E2-01
• Check the motor-rated current.
• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.
The base frequency is set incorrectly
• Check the rated frequency indicated on the motor nameplate.
• Enter the rated frequency to E1-06 (Base Frequency).
The electrical thermal protection
characteristics and motor overload
characteristics do not match
• Check the motor characteristics.
• Correct the type of motor protection that has been selected (L1-01).
• Install an external thermal relay.
The electrical thermal relay is operating at
the wrong level
• Check the current rating listed on the motor nameplate.
• Check the value set for the motor rated current (E2-01).
Motor overheated by overexcitation
operation
• Overexcitation increases the motor loss and the motor temperature. Excessive duration of overexcitation
may cause motor damage. Prevent excessive overexcitation operation or apply proper cooling to the motor.
• Reduce the excitation deceleration gain (n3-13).
• Set L3-04 (Stall Prevention during Deceleration) to a value other than 4.
Parameters related to Speed Search are set
incorrectly
• Check values set to Speed Search related parameters.
• Adjust the Speed Search current and Speed Search deceleration times (b3-02 and b3-03 respectively).
• After Auto-Tuning, set b3-24 to 1 to enable Speed Estimation Speed Search.
5.2 Fault Detection
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
185
5
Troubleshooting