YASKAWA iQpump1000 Quick Start Manual page 186

5.2 Fault Detection
Output current fluctuation due to power
supply loss
HOA Keypad Display
oL2
Cause
Load is too heavy
Acceleration or deceleration time is too
short
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
HOA Keypad Display
oL3
Cause
Parameter settings are not appropriate for
the load
Fault on the machine side (e.g., machine is
locked up)
HOA Keypad Display
oL4
Cause
Parameter settings are not appropriate for
the load
HOA Keypad Display
oL7
Cause
Excessive load inertia
Motor is driven by the load
Something on the load side is restricting
deceleration
The overload time during High Slip
Braking is too short
HOA Keypad Display
oPr
186
Check the power supply for phase loss.
Drive Overload
The thermal sensor of the drive triggered overload protection.
Reduce the load.
Increase the settings for the acceleration and deceleration times (C1-01 through C1-04).
• 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 (L6-03).
Check L6-02 and L6-03 settings.
Check the status of the load. Remove the cause of the fault.
Overtorque Detection 2
The current has exceeded the value set for Overtorque Detection 2 (L6-05) for longer than the allowable
time (L6-06).
Check the settings of parameters L6-05 and L6-06.
High Slip Braking oL
The output frequency stayed constant for longer than the time set to n3-04 during High Slip Braking.
• Reduce deceleration times in parameters C1-02 and C1-04 for applications that do not use High Slip
Braking.
• Use a braking resistor to shorten deceleration time.
• Increase parameter n3-04 (High-slip Braking Overload Time).
• Install a thermal relay and increase the setting of n3-04 to maximum value.
External HOA Keypad Connection Fault
The HOA keypad has been disconnected from the drive.
Note: An oPr fault will occur when all of the following conditions are true:
• Output is interrupted when the keypad is disconnected (o2-06 = 1).
• The Run command is assigned to the operator (b1-02 = 0 and LOCAL has been selected).
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
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