YASKAWA LA500, Technical Manual

Page: 189 / 376

T
roubleshooting
7
7.5 Minor Faults/Alarms
YASKAWA SIEPYEULA5001C LA500 Technical Manual 189
Code Name Causes Possible Solutions
The main circuit capacitors have deteriorated. Examine the capacitor maintenance time in monitor U4-05
[CapacitorMaintenance] . If U4-05 is more than 90%, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales
representative.
The drive input power transformer is too small and
voltage drops when the power is switched on. • Check for an alarm when a molded-case circuit breaker,
Leakage Breaker (ELCB, GFCI, or RCM/RCD) (with
overcurrent protective function), or magnetic contactor is ON.
• Check the capacity of the drive power supply transformer.
Air inside the drive is too hot. Measure the ambient temperature of the drive.
The Charge LED is broken. Replace the board or the drive. For information about replacing
the control board, contact Yaskawa or your nearest sales
representative.
Note:
• The drive detects this error if one of these conditions is correct when the Run command has not been input (while the drive is stopped).
– The DC bus voltage < L2-05 [Undervoltage Detection Lvl (Uv1)] .
– The Contactor that prevents inrush current in the drive was opened.
–
There is low voltage in the control drive input power.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.