Yaskawa D1000 Series Power Regenerative Converter - Manual (Page 124)

5.4 Alarm Detection
124 YASKAWA ELECTRIC TOEP C710656 07C YASKAWA Power Regenerative Converter - D1000 Instruction Manual
The phase rotation direction has changed in the
input power supply.
Correct the wiring.
The detected power supply frequency exceeded
the allowable value.
Improve the power supply.
Digital Operator
Display
Minor Fault Name Detail
Alarm
Output
(H2-=10)
HCA Current Alarm
Converter current exceeded overcurrent warning level (150% of the rated
current).
YES
Cause Possible Solutions
Load is too heavy.
Reduce the load for applications with repetitive operations (i.e., stops and starts), or replace the
converter.
Digital Operator
Display
Minor Fault Name Detail
Alarm
Output
(H2-=10)
LT-1
Cooling Fan
Maintenance Time
The cooling fan has reached its expected maintenance period and may need to be
replaced.
Note: An alarm output (H2- = 10) will only be triggered if both (H2- =
2F and H2- = 10) are set.
YES
Cause Possible Solutions
The cooling fan has reached 90% of its
expected performance life.
Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.
Digital Operator
Display
Minor Fault Name Detail
Alarm
Output
(H2-=10)
LT-2
Capacitor Maintenance
Time
The main circuit and control circuit capacitors are nearing the end of their
expected performance life.
Note: An alarm output (H2- = 10) will only be triggered if H2- = 2F.
YES
Cause Possible Solutions
The main circuit and control circuit capacitors
have reached 90% of their expected
performance lives.
Replace either the control board or the entire converter. For instructions on replacing the control
board, contact Yaskawa or your nearest sales representative.
Digital Operator
Display
Minor Fault Name Detail
Alarm
Output
(H2-=10)
LT-3
Soft Charge Bypass
Relay Maintenance
Time
The DC bus soft charge relay is nearing the end of its expected performance life.
Note: An alarm output (H2- = 10) will only be triggered if H2- = 2F.
YES
Cause Possible Solutions
The DC bus soft charge relay has reached 90%
of expected performance life. Replace either the control board or the entire converter. For instructions on replacing the control
board, contact Yaskawa or your nearest sales representative.
Digital Operator
Display
Minor Fault Name Detail
Alarm
Output
(H2-=10)
oH Heatsink Overheat
The temperature of the heatsink exceeded the overheat pre-alarm level set to
L8-02 (90-100
°C). Default value for L8-02 is determined by o2-04 (drive model
selection).
YES
Cause Possible Solutions
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 converter that may cause extra heat.
Airflow around the converter is restricted.
• Provide proper installation space around the converter as indicated in the manual. Refer to
Installation Orientation and Spacing on page 30 for details.
• Allow for the proper space and ensure that there is sufficient circulation around the control
panel.
• Check for dust or other foreign materials clogging the cooling fan.
• Clear debris caught in the fan that restricts air circulation.
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