![YASKAWA U1000 iQpump Drive Скачать руководство пользователя страница 207](http://html2.mh-extra.com/html/yaskawa/u1000-iqpump-drive/u1000-iqpump-drive_user-manual_3308978207.webp)
HOA Keypad Display
Minor Fault Name
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-
oo
= 10) will only be triggered if H2-
oo
= 2F.
Cause
Possible Solution
The main circuit and control circuit
capacitors have reached 90% of their
expected performance lives.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
HOA Keypad Display
Minor Fault Name
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-
oo
= 10) will only be triggered if H2-
oo
= 2F.
Cause
Possible Solution
The DC bus soft charge relay has reached
90% of expected performance life.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
HOA Keypad Display
Minor Fault Name
LT-4
IGBT Maintenance Time (50%)
IGBTs have reached 50% of their expected performance life.
Note:
An alarm output (H2-
oo
= 10) will only be triggered if H2-
oo
= 2F.
Cause
Possible Solution
IGBTs have reached 50% of their expected
performance life.
Check the load, carrier frequency, and output frequency.
HOA Keypad Display
Minor Fault Name
Main FdBk Lost
Using Backup FB
Main Feedback Device (H3-
oo
= B) lost.
Cause
Possible Solution
Wire-break on Analog Input Terminal
programmed for Primary PI Feedback
(H3-
oo
= B)
Check the connection of the Main Feedback transducer.
Main PI Feedback Transducer is broken.
Replace Main PI Feedback Transducer.
HOA Keypad Display
Minor Fault Name
NMS
Not Maintaining Setpoint
The setpoint cannot be maintained and P1-17 is set to 1.
Cause
Possible Solution
When the feedback deviates from the
setpoint at a level greater than P1-15, for a
time set in P1-16. This is effective only
when P1-17 is set to 1 (alarm).
• Check for a blocked impeller, over cycling, or broken pipe.
• Set the Not Maintaining Setpoint alarm characteristics in P1-16 and P1-17.
• Drive response to this condition is controlled by P1-17, Not Maintaining Setpoint Selection.
HOA Keypad Display
Minor Fault Name
oH
Heatsink Overheat
The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02.
Cause
Possible Solution
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.
Internal cooling fan has stopped.
• Replace the cooling fan.
• After replacing the drive, set parameter o4-03 to 0 to reset the cooling fan operation time.
Airflow around the drive is restricted.
• Provide proper installation space around the drive as indicated in the manual.
Orientation and Spacing on page 38
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.
5.4 Alarm Detection
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual
207
5
Troubleshooting