Emerson MPR15 Series User Manual

76   Maintenance 

UM5C06B / C ( 169-2071-500 )   P0711722   Standard 10.00   May 2001 

Verify that the sense leads of all the rectifiers are connected to a common 

point (across the battery or output power terminals of the power shelf, or at 

the discharge busbar). 

Readjust the rectifier’s float voltage until all the rectifiers share the load. It is 

recommended that the current from each rectifier be 3 amperes minimum 

for best results. 

It is also recommended to leave the units functioning for at least 30 minutes 

to reach full stability, prior to final system adjustment. 

Fan failure is indicated by the absence of fan rotation. The rectifier will be 

inhibited and an RFA and Fan alarm will be activated. The Fan Fail LED will 

turn RED. 

 

 

Before replacing the fan, turn the rectifier off. Remove the 

rectifier from the shelf. Wait five minutes to allow all 

internal capacitors to fully discharge.

 

  

  

  

Take the necessary precautions to prevent any dirt, dust, 

moisture, or metallic particles from falling into the unit.

 

With the unit sitting solidly on a clean workbench, carefully remove the 

five mounting screws that secure the fan assembly (see Figure 27). 

Slowly and carefully remove the fan assembly by pulling it from the 

chassis. 

Take note of which side the wire is connected to the fan and disconnect 

the fan connector (three pins). 

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