RMM PC BOARD Replacement - CONTINUED

Hi-Rel PCB Replacement

To test of replace an RMM or HI-REl assembly, it is neccessary to partially disassemble the fan. Preceed as follows:

TURN POWER OFF.

1. Remove the blades and blade holder assemblies.

2. Remove the housing thru-bolts while hoding the botton late in place.

3. Remove the bottom plate and center band.

4. To test for a defective RMM or HI-REL assembly, remove the two connectors (AC/Motor & BFR) by grasping the edges and gently pulling out with a very slight rocking motion. Plug the connectors into a new RMM board.



( Figure #1 )


Be sure thatthe connector and jumper pin positions are aligned and pin #1 is inserted into pin #1.

 

5. If the problem is eliminated, remove the defective ASSEMBLY. To remove the ASSEMBLY, unplug the two (2) plugs as shoen in (figure #1) blow. Next loosen the two (2) holding screws ion the motor as shown in (figure #2)

( Figure #2 )

and gently pull the unit away from the motor as shown in (figure #3) shown below.



( Figure #3 )

RMM PC BOARD Replacement - CONTINUED






   

 

 


To Find a Service Center Near You
Call Toll Free: 1-888-227-2178