Yaskawa AC Drive-P1000 Industrial Fan - Manual (Page 305)

Digital Operator Display Fault Name
oL2
Drive Overload
The thermal sensor of the drive triggered overload protection.
Cause Possible Solution
Load is too heavy Reduce the load.
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
• 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.
Drive capacity is too small Replace the drive with a larger model.
Overload occurred when operating at low
speeds
• 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).
Excessive torque compensation Reduce the torque compensation gain in parameter C4-01 until there is no speed loss but less current.
Parameters related to Speed Search are set
incorrectly
• 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.
Output current fluctuation due to input phase
loss
Check the power supply for phase loss.
Digital Operator Display Fault Name
oL3
Overtorque Detection 1
The current has exceeded the value set for torque detection (L6-02) for longer than the allowable time
(L6-03).
Cause Possible Solution
Parameter settings are not appropriate for the
load
Check L6-02 and L6-03 settings.
Fault on the machine side (e.g., machine is
locked up)
Check the status of the load. Remove the cause of the fault.
Digital Operator Display Fault Name
oL4
Overtorque Detection 2
The current has exceeded the value set for Overtorque Detection 2 (L6-05) for longer than the allowable
time (L6-06).
Cause Possible Solution
Parameter settings are not appropriate for the
load
Check the settings of parameters L6-05 and L6-06.
Digital Operator Display Fault Name
oL7
High Slip Braking oL
The output frequency stayed constant for longer than the time set to n3-04 during High Slip Braking.
Cause Possible Solution
Excessive load inertia
• 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.
Motor is driven by the load
Something on the load side is restricting
deceleration
The overload time during High Slip Braking
is too short
• Increase parameter n3-04 (High-slip Braking Overload Time).
• Install a thermal relay and increase the setting of n3-04 to maximum value.
Digital Operator Display Fault Name
oPr
External Digital Operator Connection Fault
The external operator 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 operator is disconnected (o2-06 = 1).
• The Run command is assigned to the operator (b1-02 = 0 and LOCAL has been selected).
Cause Possible Solution
6.4 Fault Detection
YASKAWA SIEP YAIP1U 01B AC Drive - P1000 Technical Manual 305
6
Troubleshooting