If the temperature inside the SERVOPACK panel exceeds 55°C , the drive's ability to dissipate heat is reduced, leading to premature overload warnings.
If you are using a cheap “brick” power supply or tapping into machine PLC power, upgrade to an industrial DIN-rail 24V DC power supply (e.g., Mean Well, PULS, or Yaskawa’s own option). Set the output to exactly 24.5V to provide a margin against voltage drops. yaskawa error code a910