YASKAWA GA700 Technical Manual page 308

6.5 Minor Faults/Alarms
Code Name
Note:
• Detected if one of the following situations was true when the drive was stopped or when the Run command was not entered:
–The DC bus voltage dropped below the value set in L2-05 [Undervoltage Detect Level (Uv1)].
–Contactor for restraining inrush current in the drive was opened.
–Low voltage in the control drive input power..
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
308
Cause
The main circuit capacitors are worn.
The drive input power transformer is too
small and voltage drops when the power
is switched on.
Air inside the drive is too hot.
The Charge LED is broken.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Possible Solution
Check the capacitor maintenance period in U4-05
[CapacitorMaintenance]. If U4-05 exceeds 90%,
replace the control board or the entire drive. For
more information on replacing the control board,
contact Yaskawa or your nearest sales
representative.
• Check for an alarm when a molded-case circuit
breaker, Leakage Breaker (ELCB, GFCI, or
RCM/RCD) (with overcurrent protective
function), or electromagnetic contactor is ON.
• Check the capacity of the drive power supply
transformer.
Check the ambient temperature of the drive.
Replace the board or the entire drive. For
instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.