Error handling: Motor power OFF.
Error reset: Possible.
Content: The rotational speed of a fan inside the controller has decreased.
Main causes:
-
The fan has deteriorated with age.
-
An open circuit or poor connection in the harness between the fan and power supply unit control board.
-
A problem with the power supply unit control board or power supply unit power board.
-
A problem with the brake power supply inside the power supply unit.
Countermeasures:
-
Check that the harness between the fan and power supply unit control board is properly connected.
-
Replace the fan.
-
Replace the power supply unit.
- (FANXX-XX) in the error message indicates the power supply unit number and fan number. These symbols identify the fan with a problem. For fan installation locations, refer to "Note: Regarding warning W1053, see below." in section 4.5.4.

CAUTION
This error can be reset, and the robot can continue operating in its present condition. However, continued use in this condition may adversely affect the controller components, so take corrective action as soon as possible.