YASKAWA T1000V Technical Manual page 260

6.5 Alarm Detection
LED Operator Display
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
Cause
Inappropriate parameter settings.
There is a fault on the machine side (e.g.,
the machine is locked up).
LED Operator Display
Cause
Parameter settings are not appropriate.
There is a fault on the machine side (e.g.,
the machine is locked up).
LED Operator Display
Cause
Overshoot or undershoot is occurring.
PG pulse settings are incorrect.
Parameter settings are inappropriate.
260
Motor Overheat
oH3
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 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
oL3
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
oL4
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.
Overspeed (for Simple V/f with PG)
oS
Pulse input (RP) indicates that motor speed feedback exceeded F1-08 setting.
• Adjust the gain by using the pulse train input parameters (H6-02 through H6-05).
• Adjust the speed feedback accuracy.
• Increase the settings for C5-01 (Speed Control Proportional Gain 1) and reduce C5-
02 (Speed Control Integral Time 1).
Set the H6-02 (Pulse Train Input Scaling) = 100%, the number of pulses during
maximum motor revolutions.
Check the setting for the overspeed detection level and the overspeed detection time
(F1-08 and F1-09).
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Minor Fault
Output
(H2- = 10)
YES
YES
YES
Minor Fault
Output
(H2- = 10)
YES
YES
Minor Fault
Output
(H2- = 10)
YES
YES
Minor Fault
Output
(H2- = 10)
YES
YES
YES