LED Operator Display
Minor Fault Name
oH
Heatsink Overheat
The temperature exceeded the maximum allowable value.
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 10)
Surrounding temperature is too high
• Check the surrounding temperature.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool surrounding area.
• Remove anything near drive that may cause extra heat.
YES
Internal cooling fan has stopped.
• Replace the cooling fan.
Refer to Cooling Fan Replacement on page 267
.
• After replacing the drive, reset the cooling fan maintenance parameter to (o4-03 = “0”).
YES
Airflow around the drive is restricted.
• Provide proper installation space around the drive as indicated in the manual.
Refer
to Correct Installation Orientation on page 31
.
• Allow for the specified space and ensure that there is sufficient circulation around the
control panel.
YES
• Check for dust or foreign materials clogging cooling fan.
• Clear debris caught in the fan that restricts air circulation.
YES
LED Operator Display
Minor Fault Name
oH2
Drive Overheat Warning
“Drive Overheat Warning” was input to a multi-function input terminal, S1 through S6 (H1-
= B)
Cause
Possible Solutions
Minor Fault
Output
(H2-
= 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-
= 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-
= 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-
= 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-
= 10)
Overtorque occurred, triggering the
mechanical weakening level set to L6-08. Check for the cause of mechanical weakening.
YES
6.5 Alarm Detection
244
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
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