YASKAWA V1000 Series Technical Manual page 240

6.5 Alarm Detection
Cause
Internally, both Hardwire Baseblock channels are
broken.
There is no signal at terminal H1.
LED Operator Display
Cause
One of the baseblock channels is faulty.
LED Operator Display
Cause
Load is too heavy.
Acceleration and deceleration times are too short.
A special-purpose motor is being used, or the drive is
attempting to run a motor greater than the maximum
allowable capacity.
The current level increased due to Speed Search after a
momentary power loss or while attempting to perform a
fault restart.
LED Operator Display
Cause
Surrounding temperature is too high
Internal cooling fan has stopped.
Airflow around the drive is restricted.
LED Operator Display
Cause
An external device triggered and overheat warning in the
drive.
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
240
Hardwire Baseblock Signal Input
Hbb
Hardwire Baseblock input signal open.
Replace the drive.
Check the wiring of terminal H1. Check if the PLC signal is set correctly.
Hardwire Baseblock Signal Input
HbbF
One of the baseblock channels is damaged.
Replace the drive.
Current Alarm
HCA
Drive current exceeded overcurrent warning level (150% of the rated current).
• Measure the current flowing through the motor.
• Reduce the load or increase the capacity of the drive.
• Calculate the torque required during acceleration and for the inertia moment.
• If the torque level is not right for the load, take the following steps:
• Increase the acceleration and deceleration times (C1-01 through C1-08).
• Increase the capacity of the drive.
• Check the motor capacity.
• Use a motor appropriate for the drive. Ensure the motor is within the allowable capacity range.
The alarm will appear only briefly. There is no need to take action to prevent the alarm from occurring in such instances.
Heatsink Overheat
oH
The temperature exceeded the maximum allowable value.
• 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.
• Replace the cooling fan.
• After replacing the drive, reset the cooling fan maintenance parameter to (o4-03 = "0").
• Provide proper installation space around the drive as indicated in the manual. Refer to
• Allow for the specified space and ensure that there is sufficient circulation around the control panel.
• Check for dust or foreign materials clogging cooling fan.
• Clear debris caught in the fan that restricts air circulation.
Drive Overheat Warning
oH2
"Drive Overheat Warning" was input to a multi-function input terminal, S1 through S7 (H1-oo
• Search for the device that tripped the overheat warning.
• Solving the problem will clear the warning.
Motor Overheat
oH3
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level (H3-02 or H13-10 = 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
oL3
Drive output current (or torque in OLV) was greater than L6-02 for longer than the time set in L6-03.
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Refer to Cooling Fan Replacement on page
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
261.
Figure 2.1 on page 26.
Minor Fault
Output
(H2-oo = 10)
YES
YES
Minor Fault
Output
(H2-oo = 10)
YES
Minor Fault
Output
(H2-oo = 10)
YES
YES
YES
YES
Minor Fault
Output
(H2-oo = 10)
YES
YES
YES
YES
Minor Fault
Output
(H2-oo = 10)
YES
Minor Fault
Output
(H2-oo = 10)
YES
YES