Marathon DVR 2000E - Generator Voltage Does Not Build

S
ection
7
S
ection
7
SECTION 7 • MAINTENANCE AND TROUBLE-
SHOOTING
PREVENTATIVE MAINTENANCE
The only preventive maintenance required on the DVR2000E is to periodically check that the connections between
the DVR2000E and the system are clean and tight. DVR2000E units are manufactured using state-of-the-art,
surface-mount technology. As such, Marathon Electric recommends that no repair procedures be attempted by
anyone other than Marathon Electric personnel.
TROUBLESHOOTING
If you do not get the results that you expect from the DVR2000E, rst check the programmable settings for the
appropriate function. Use the following troubleshooting procedures when difculties are encountered in the
operation of your excitation system.
Generator Voltage Does Not Build
Step 1. Verify that all wiring is properly connected. Refer to Figures 4-6 through 4-10.
If wiring is improperly connected or loose, reconnect wiring properly.
If wiring connections are correct, proceed to Step 2.
Step 2. Verify that the generator is spinning at rated speed.
If the generator is not up to rated speed, increase generator speed to the rated value.
If the generator is spinning at rated speed, proceed to Step 3.
Step 3. Check for correct input power to the DVR2000E. Refer to Section 1, General Information, Specications
for input power requirements.
If voltage is not present, refer to the generator manual for repair procedures.
If voltage is present, proceed to Step 4.
Step 4. Verify that the fuse is not open.
Replace any open fuse.
If no fuses are open, proceed to Step 4.
Step 5. Verify that the front panel OVEREXCITATION SHUTDOWN indicator is not lit.
If the front panel OVEREXCITATION SHUTDOWN indicator (eld voltage) is lit, check the generator
and/or load conditions. Interrupt input power or shut down the generator for a minimum of one minute.
If the front panel OVEREXCITATION SHUTDOWN indicator is not lit, proceed to Step 6.
Step 6. Verify that the front panel OVEREXCITATION LIMITING indicator is not lit.
If the front panel OVEREXCITATION LIMITING indicator is lit, check the generator and load conditions.
Also check the eld current limit setpoint for the correct level. Interrupt input power or shut down the
generator for a minimum of 1 minute.
If the front panel OVEREXCITATION LIMITING indicator is not lit, proceed to Step 7.
Step 7. Verify that the DVR2000E soft start settings are correct. Too long of a soft start setting may give the
appearance of no buildup.
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