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