YASKAWA V1000 Technical Manual page 271

LED Operator Display
oH2
Cause
An external device triggered and overheat
warning in the drive.
LED Operator Display
oH3
Cause
Motor thermostat wiring is fault (PTC
input).
There is a fault on the machine side (e.g.,
the machine is locked up).
Motor has overheated.
LED Operator Display
oL3
Cause
Inappropriate parameter settings.
There is a fault on the machine side (e.g.,
the machine is locked up).
LED Operator Display
oL4
Cause
Parameter settings are not appropriate.
There is a fault on the machine side (e.g.,
the machine is locked up).
LED Operator Display
oL5
Cause
Overtorque occurred, triggering the
mechanical weakening level set to L6-08.
LED Operator Display
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Drive Overheat Warning
"Drive Overheat Warning" was input to a multi-function input terminal, S1 through S7 (H1-oo= B)
• Search for the device that tripped the overheat warning.
• Solving the problem will clear the warning.
Motor Overheat
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level
(H3-02 or H3-10 = E).
Repair the PTC input wiring.
• Check the status of the machine.
• Remove the cause of the fault.
• 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.
Overtorque 1
Drive output current (or torque in OLV) was greater than L6-02 for longer than the time set in L6-03.
Check parameters L6-02 and L6-03.
• Check the status of the machine.
• Remove the cause of the fault.
Overtorque 2
Drive output current (or torque in OLV) was greater than L6-05 for longer than the time set in L6-06.
Check parameters L6-05 and L6-06.
• Check the status of the machine being used.
• Remove the cause of the fault.
Mechanical Weakening Detection 1
Overtorque occurred, matching the conditions specified in L6-08.
Check for the cause of mechanical weakening.
Overspeed (for Simple V/f with PG)
oS
Pulse input (RP) indicates that motor speed feedback exceeded F1-08 setting.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
6.5 Alarm Detection
Minor Fault
Output
(H2-oo =
10)
YES
Minor Fault
Output
(H2-oo =
10)
YES
YES
YES
Minor Fault
Output
(H2-oo =
10)
YES
YES
Minor Fault
Output
(H2-oo =
10)
YES
YES
Minor Fault
Output
(H2-oo =
10)
YES
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