VPRS-4175E OPERATION MANUAL
Issue : 2009.03
ED : 1
VPRS-4175E OPERATION MANUAL 37 /31
10.1 Problem Solving
This rectifier has been designed for users to solve problems easily. The LCD
window of the control panel displays details of faults.
10.2 Replacing Parts
If a fault is suspected on a particular point, circuit board of that point should be
replaced. Replacing or replacement of individual circuits should not be made in
fields. Field replaceable units are limited to fan on a rectifier module, distribution
panel fuse and NFB.
10.3 Order of Replacement
10.3.1 Replacement of Rectifier Module (VPRM5435)
1) When a rectifier module is replaced, alarm will be driven. Turn off the rectifier
module from the control panel, or notify this fact to the person in charge.
2) Set the switch of the rectifier module to ‘STB’.
3) Turn the captive screw of the module counter clockwise. Then, take out the
module from the shelf seizing the handle on it.
4) Check if the switch of the new module is set to ‘STB’. Then, push it to the
end of the shelf along the slide.
5) Turn the captive screw of the module clockwise. Then, fix it to the shelf.
6) Set the switch of the rectifier to ON position.
7) Check if the module operates normally, and if any alarm is driven on it.
10.3.2 FAN Replacement of Rectifier Module
FAN should be replaced in the following order:
