Regal 53 SC Owner's Manual page 472

Troubleshooting Notes
The DVSR unit is integrated into the battery management
panel.
While troubleshooting can be done with a D C. volt meter,
the best tool would be and inductive amp meter, which will
make the task faster and easier.
The DVSR unit has a RED LED indicator light on the
face of the unit which will light up indicating the DVSR
contacts are in a closed/current sharing condition. When
the red light is not lit, the DVSR contacts are open and the
two system batteries are isolated from each other, with a
correctly working DVSR unit.
Testing Process;
1. Turn off battery charging sources including engine
alternators.
2. Allow 30 minutes for the battery voltage to settle in their
natural state of charge.
3. Deplete batteries below 13 volts or until the DVSR
red LED indicators are no longer lit, to validate battery
isolation.
4. Measure all battery voltages and note those values for
future reference if needed,
5. Maintain a 20 to 25 amp load on the house battery to
help keep that battery below 13 volts while testing.
6. Start engine, and with an inductive amp meter or D.C.
volt meter check for charging circuit current at the engine
battery.
7. If charging current cannot be validated, determine cause
and repair before moving to step 8.
8. Use an inductive amp meter or D.C. volt meter, check
for charging current/elevated voltage at the DVSR unit.
TESTING A DVSR
9. Using an inductive amp meter or D.C. volt meter, check
for charging current/elevated voltage through the DVSR.
10. If step 9 cannot be validated, check for a good nega-
tive ground to the DVSR unit and correct if necessary.
11. If the negative ground is good to the DVSR, yet there
is no charging current through the DVSR, the DVSR is
defective and must be replaced.
12. If charging current or elevated voltage is validated
through the DVSR to the house battery with the engine
running, the DVSR unit and the system is functioning
properly.
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Troubleshooting