YASKAWA V1000 Series Installation & Start-Up Manual page 216

5 . 5 F a u l t D e t e c t i o n
Cause
Overexcitation current is enabled.
Speed Search related parameters are
not set to the proper values.
LED Operator Display
Cause
Load is too heavy.
Cycle times are too short during
acceleration and deceleration.
Voltage is too high for the V/f
characteristics.
Drive capacity is too small.
Overload occurred when operating
at low speeds.
Excessive torque compensation.
Speed Search related parameters are
not set correctly.
LED Operator Display
Cause
Parameter settings are not
appropriate for the type of load.
There is a fault on the machine side
(e.g., the machine is locked up).
216
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
• Overexcitation is a potential serious danger to the motor.
• Reduce the excitation deceleration gain (n3-13).
• Set L3-04 (Stall Prevention during Deceleration) to a value other than 4.
• Disable overexcitation (n3-23 = "0").
• 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, enable Speed Estimation Type Search (b3-24 = "1").
Drive Overload
oL2
The thermal sensor of the drive triggered overload protection.
Reduce the load.
Increase the settings for the acceleration and deceleration times (C1-01
through C1-08).
• 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 because 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 (C4-01) until there is no speed loss but
less current.
• Check the settings for all Speed Search related parameters.
• Adjust the current used during Speed Search and the Speed Search
deceleration time (b3-03 and b3-02 respectively).
• After Auto-Tuning the drive, enable the Speed Search Estimation Type
(b3-24 = "1").
Overtorque Detection 1
oL3
The current has exceeded the value set for torque detection (L6-02) for longer
than the allowable time (L6-03).
Check the settings of parameters L6-02 and L6-03.
Check the status of the load.
Remove the cause of the fault.
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution