Basler Electric DECS-400 - Manual (Page 161)

9369700990 Rev R 149
Maintenance
DECS-400 preventative maintenance consists of regular checks to ensure that the DECS-400
connections are clean and tight and periodic replacement of the backup battery. See Backup Battery
Replacement for battery replacement guidelines.
Storage
Stored units should be kept in the original shipping package in a moisture- and dust-free environment.
This device contains long-life aluminum electrolytic capacitors. For devices that are not in service (spares
in storage), the life of these capacitors can be maximized by energizing the device for 30 minutes once
per year.
Warranty and Repair Service
DECS-400 units are manufactured using state-of-the-art, surface mount technology. As such, Basler
Electric recommends that no maintenance procedures be attempted by anyone other than Basler Electric
personnel.
The DECS-400 is warranted against defective material and workmanship for 18 months from the date of
shipment from our factory. Units submitted for warranty repair should be returned to the factory in
Highland, Illinois, freight pre-paid, with a complete description of the installation and the reported problem.
Pre-arrangement with either the nearest Basler Electric sales office or with the Technical Sales Support
department at the factory will assure the fastest possible turn-around time.
Troubleshooting
These troubleshooting procedures assume that the excitation system components are selected correctly,
fully operational, and connected correctly. If you do not get the results that you expect from the DECS-
400, first check the programmable settings for the appropriate function.
DECS-400 Appears Inoperative
If the DECS-400 does not power up (no backlighting on front panel display), ensure that the operating
power connections are correct and the voltage level is within the acceptable range. AC operating power
connects to terminals C2 (N) and C3 (L) and must be within the range of 82 to 132 Vac. DC operating
power connects to terminals C4 (BATT–) and C5 (BATT+). A DECS-400 with style number XCXX has an
operating range of 90 to 150 Vdc. A DECS-400 with style number XLXX has an operating range of 16 to
60 Vdc.
Display Blank or Frozen
If the front panel display (LCD) is blank or frozen (does not scroll), remove input power and then reapply
input power after approximately 60 seconds. If the problem occurred during software uploading, repeat
the upload procedures as described in the associated instructions. If the problem persists, return the unit
to the factory as described in the preceding paragraphs.
Generator Voltage Does Not Build
Check the DECS-400 settings for the following system configurations:
a. Generator potential transformer (PT) primary voltage
b. Generator PT secondary voltage
c. Analog control output signal type
Check the DECS-400 soft start settings:
d. Maximum field flash dropout time
DECS-400 Maintenance