LED Operator Display Minor Fault Name
oH2
Drive Overheat Warning
“Drive Overheat Warning” was input to a multi-function input terminal, S1 through S7 (H1-oo= B)
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
An external device triggered and overheat
warning in the drive.
• Search for the device that tripped the overheat warning.
•
Solving the problem will clear the warning.
YES
LED Operator Display Minor Fault Name
oH3
Motor Overheat
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level
(H3-02 or H3-10 = E).
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
Motor thermostat wiring is fault (PTC
input).
Repair the PTC input wiring. YES
There is a fault on the machine side (e.g.,
the machine is locked up).
• Check the status of the machine.
• Remove the cause of the fault.
YES
Motor has overheated.
• Check the load size, accel/decel times, and cycle times.
• Decrease the load.
• Increase accel and decel times (C1-01 to C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). This will mainly involve reducing
E1-08 and E1-10. Note: Do not lower E1-08 and E1-10 excessively, because this
reduces load tolerance at low speeds.
• Check the motor-rated current.
• Enter motor-rated current on motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
YES
LED Operator Display Minor Fault Name
oL3
Overtorque 1
Drive output current (or torque in OLV) was greater than L6-02 for longer than the time set in L6-03.
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
Inappropriate parameter settings. Check parameters L6-02 and L6-03. YES
There is a fault on the machine side (e.g.,
the machine is locked up).
• Check the status of the machine.
• Remove the cause of the fault.
YES
LED Operator Display Minor Fault Name
oL4
Overtorque 2
Drive output current (or torque in OLV) was greater than L6-05 for longer than the time set in L6-06.
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
Parameter settings are not appropriate. Check parameters L6-05 and L6-06. YES
There is a fault on the machine side (e.g.,
the machine is locked up).
• Check the status of the machine being used.
•
Remove the cause of the fault.
YES
LED Operator Display Minor Fault Name
oL5
Mechanical Weakening Detection 1
Overtorque occurred, matching the conditions specified in L6-08.
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
Overtorque occurred, triggering the
mechanical weakening level set to L6-08.
Check for the cause of mechanical weakening. YES
LED Operator Display Minor Fault Name
oS
Overspeed (for Simple V/f with PG)
Pulse input (RP) indicates that motor speed feedback exceeded F1-08 setting.
6.5 Alarm Detection
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
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Troubleshooting
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