DHC BT400 Manual Del Propietário página 10

7. When testing older model diesel engines, the
users need to run up the engine to 2500 rpm for
15 secs.
8. Press «ENTER» to read the ripple from the charging system to the battery.
One of the three testing results will be displayed along with the actual testing
measured.
RIPPLE DETECTED NORMAL
Diodes function well in the alternator / starter.
NO RIPPLE DETECT
Ripple is not detected.
EXCESS RIPPLE DETECTED
One or more diodes in the alternator are not
functioning or there is stator damage. Check to
ensure the alternator mounting is sturdy and
that the belts are in good shape and functioning
properly. If the mounting and belts are good,
replace the alternator.
9. Press the «ENTER» key to continue the charging system with accessory
loads. One of the three results will be displayed along with the actual testing
measured.
CHARGING SYSTEM HIGH WHEN
TEST WITH ACCESSORY LOADS
The voltage output from the alternator to the
battery exceeds the normal limits of a
functioning regulator.
Check to ensure there are no loose connections and that the ground
connection is normal. If there are no connection issues, replace the regulator.
Since most alternators have the regulator built-in, this will require you to
replace the alternator.
RUN ENGINE UP
TO 2500RPM 15
xx.xx V NORMAL
NO RIPPLE DETECT
PRESS ENTER
ALT. LOAD VOLTS
10
10
SEC
RIPPLE
DETECTED
RIPPLE
DETECTED
xx.xx V HIGH
xx.xx V HIGH