Yaskawa Varispeed 626M5 - Manual (Page 245)

14.2 Standard Motor Specifications
14 -41
14.2.10 Replacing the Motor Cooling Fan
The AC main axis motor is cooled using a cooling fan mounted to the back of the motor. If the cooling fan
malfunctions due to dirt or damage, replace the cooling fan immediately. For spare parts, refer to 14.2.9
Spare Motor Parts.
Never replace the cooling fan or insert or remove wiring while the power supply is turned ON. Also, when
replacing the cooling fan or inserting or removing wiring, be sure not to drop screws or other small parts into
the motor unit.
Replace the Motor Cooling Fan using the following procedure.
1. Turn OFF the power supply. Make sure the main circuit capacitor has fully discharged by confirming
that the CHARGE indicator is not lit before starting work.
2. Remove the cooling fan lead cables inside the terminal box, and pull out the lead cables from the lead
cable vent.
3. Remove the four screws used to mount the casing to the motor unit, and the screws within the terminal
box used to fix the terminal box to the casing.
4. Remove the cooling fan and the casing as a single unit.
5. Perform steps 1. to 4. in reverse to mount the new cooling fan and the casing as a single unit to the motor
unit.
6. Apply Three Bond No. 1212 to the lead cable vent on the terminal box to seal the vent.
Note: When performing step 4., if the casing and terminal box interfere with each other making
it difficult to remove the casing, loosen the terminal box mounting screws.
Casing mounting
screws (x 4)
Casing (Forms
single unit with
cooling fan.)
Motor unit
Terminal box
Casing Mounting
Terminal box mounting screw
Cooling fan lead wires
Casing fixing screw
Lead wire vent
Terminal Box Exterior
Fig 14.15 Replacing the Motor Cooling Fan
14
IMPORTANT