YASKAWA iQpump Micro CIMR-PW Series User Manual page 276

6.4 Alarm Detection
LED Display LCD Display
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
The wrong motor rated current is set to E2-01
The base frequency is set incorrectly
The electrical thermal protection
characteristics and motor overload
characteristics do not match
The electrical thermal relay is operating at
the wrong level
Motor overheated by overexcitation
operation
Parameters related to Speed Search are set
incorrectly
Output current fluctuation due to power
supply loss
LED Display LCD Display
ol2
Cause
Load is too heavy
Acceleration or deceleration time is too short Increase the settings for the acceleration and deceleration times (C1-01 through C1-04).
The output voltage is too high
Drive capacity is too small
Overload occurred when operating at low
speeds
Excessive torque compensation
Parameters related to Speed Search are set
incorrectly
Output current fluctuation due to input phase
loss
LED Display LCD Display
ol3
Cause
Parameter settings are not appropriate for the
load
Fault on the machine side (e.g., machine is
locked up)
276
Increase the acceleration and deceleration times (C1-01 through C1-04).
• 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 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.
• Check the motor-rated current.
• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.
• Check the rated frequency indicated on the motor nameplate.
• Enter the rated frequency to E1-06 (Base Frequency).
• Check the motor characteristics.
• Correct the type of motor protection that has been selected (L1-01).
• Install an external thermal relay.
• Check the current rating listed on the motor nameplate.
• Check the value set for the motor rated current (E2-01).
• 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.
• 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.
Check the power supply for phase loss.
Drive Overload
oL2
The thermal sensor of the drive triggered overload protection.
Reduce the load.
• Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.
• Do not lower E1-08 and E1-10 excessively. This reduces load tolerance at low speeds.
Replace the drive with a larger model.
• Reduce the load when operating at low speeds.
• Replace the drive with a model that is one frame size larger.
• Lower the carrier frequency (C6-02).
Reduce the torque compensation gain in parameter C4-01 until there is less current but no speed loss.
• Check the settings for all Speed Search related parameters.
• Adjust the current used during Speed Search (b3-03) and the Speed Search deceleration time (b3-02).
• After Auto-Tuning, set b3-24 to 1 to enable Speed Estimation Speed Search.
Check the power supply for phase loss.
Overtorque Detection 1
The current has exceeded the value set for torque detection (L6-02) for longer than the allowable time
oL3
(L6-03).
Check L6-02 and L6-03 settings.
Check the status of the load. Remove the cause of the fault.
Minor Fault Name
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual