Cause:

• The fuse (4A fuse) installed at the bottom of the 24 V power supply circuit in the controller may have blown out.
  For the fuse blowout, the emergency stop made by the customer may be the cause, or there may be a ground fault or short circuit with the 24 V power supply in the wiring of a door switch, enabling device, etc.
• The T/B might be out of order.

Measures:

• Investigate and correct the ground fault or short circuit portion in the wiring made by the customer. Then, replace the fuse inside the controller.