Manuals / Emerson / Computer Equipment / Switch

Emerson MPR25 Fault diagnosis, Symptom, Possible cause, The switch is on the Test/Bypass position

Models: MPR15 Series MPR25

1 120
Download 120 pages 55.76 Kb
Page 79
Image 79
Fault diagnosis

 

 

Maintenance 79

Fault diagnosis

 

 

Symptom:

Possible cause

 

 

 

 

Low Voltage Test/Bypass

The switch is on the Test/Bypass position

 

LED lit

 

 

 

 

 

LVA and LVD LED lit

Check the voltage level at the test jacks and

 

 

the position of the Test switch. Verify the LVA

 

 

and LVD adjustment. Set the test switch to the

 

 

Test/Bypass position to verify their operation.

 

 

Replace the circuit pack if it is still not

 

 

operational.

 

The LVD disconnects the load

Verify the voltage at the test jacks. Remove the

 

 

faceplate and check the fuse located on the

 

 

control PCB.

25A Switch Mode RectifierNT5C06B / C Installation and User Manual

Page 78 Page 80
Page 79
Image 79
Emerson MPR25, MPR15 Series user manual Fault diagnosis, Symptom, Possible cause, The switch is on the Test/Bypass position
Page 78 Page 80