Toshiba E3, Manual

8

1.2  Removal Procedure 

Removal of the N2 interface board from a EIII inverter should only be performed by a 
qualified technician familiar with the maintenance and operation of the EIII.  In order to 
protect the interface board connector’s reliability, do not repeatedly connect and 
disconnect the interface board.  Use the following procedure if it becomes necessary 
to remove the N2 interface board from the inverter. 

CAUTION!

  Do not remove the interface board while power is applied to 

the inverter.  Removing the interface board with power applied may damage the 
inverter. 
 

1. 

CAUTION!

  Verify that all input power sources to the inverter have 

been turned OFF and are locked and tagged out. 

2. 

DANGER!

 Wait at least 5 minutes for the inverter’s electrolytic 

capacitors to discharge before proceeding to step 3.  

Do not touch any internal 

parts with power applied to the inverter, or for at least 5 minutes after 
power to the inverter has been removed.  A hazard exists temporarily for 
electrical shock even if the source power has been removed.

3. 

 Remove the inverter’s cover (open the door on units with hinged doors). 

Verify that the CHARGE LED has gone out before continuing the removal process. 

4.  Loosen the 4 screws attaching the operation panel support bracket to the control 

board support bracket and remove the operation panel and support bracket as a unit 
(refer to Figure 3). 

5. 

CAUTION!

  The communications interface is a static-sensitive 

device.  Standard electrostatic-sensitive component handling precautions should 
be observed.  Release the 4 corners of the interface board from the standoffs by 
pressing down on the standoff locking tabs with a small flat-headed screwdriver.  
Be careful to not apply any abnormal stress to the interface board while performing 
this, as this may damage the interface board or control board connectors. 

6.  Remove the interface board from the inverter. 

7.  Disconnect the N2 bus cable from the interface board connector (TB1), and pull 

the cable out through the access holes at the bottom of the inverter. 

8.  Carefully re-install the operation panel and support bracket and tighten the 4 

screws that attach the operation panel support bracket to the control board 
support bracket. 

9.  Reinstall the inverter’s cover (close and latch the door on units with hinged doors). 

DANGER!

Do not operate unit with the cover off / cabinet 

door open.