5.6 Alarm Detection
230 YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
The current level increased due to
Speed Search after a momentary
power loss or while attempting to
perform a fault restart.
The alarm will appear only briefly. There is no need to take
action to prevent the alarm from occurring in such
instances.
YES
LED Operator Display Minor Fault Name
LT-1
Cooling Fan Maintenance Time
Indicates that the maintenance time period for the cooling fan has passed the
alarm level.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
• 90% of the cooling fan maintenance
time has passed.
• Detected only when a
multi-function contact (H2-) is
set to 2F.
Replace the cooling fan. Refer to Cooling Fan
Replacement on page 278.
Note: After replacing the drive, reset the cooling fan
maintenance parameter (o4-03 = “0”).
No output
LED Operator Display Minor Fault Name
LT-2
Capacitor Maintenance Time
Indicates that the maintenance time period for the capacitors has passed the
alarm level.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
• 90% of the capacitor maintenance
time has passed.
• Detected only when a
multi-function contact output (H2-
) is set to 2F.
Replace the drive. Refer to Drive Replacement on
page 282
No output
LED Operator Display Minor Fault Name
LT-3
DC Bus Pre-charge Relay Maintenance Time
Indicates that the maintenance time period for the soft starter has passed the
alarm level.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
• 90% of the Soft Starter maintenance
time has passed.
• Detected only when a
multi-function contact output
(H2-) is set to 2F.
Replace the drive. Refer to Drive Replacement on
page 282
No output
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