ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
n.
Connect all wires previously disconnected.
o. Close output box access door.
4-1-3 Testing. (Regulator. P/N: 19890-002 For MEF-815A Generator Set).
a.
b.
c.
d.
e.
f.
9.
h.
i.
j.
k.
l.
Shut down generator set.
Open output box access door.
Note position of voltage reconnection terminal board.
Start generator set and turn VOLTAGE adjust potentiometer to ensure the adjustment ranges on TABLE 4-2 are
met, depending on position of voltage reconnection terminal board.
Shut down generator set.
If no voltage or Iow voltage was indicated, or voltage adjustment range could not be achieved, perform the follow-
ing steps. Otherwise, AC voltage regulator (2, FIGURE 4-3) is serviceable.
Disconnect wire 141A from terminal 1 of AC voltage regulator.
Set multimeter for DC volts and connect positive lead to wire 141A. Connect negative lead of multimeter to termi-
nal 3 of AC voltage regulator. Start generator set and operate at rated frequency. Move and hold MASTER
SWITCH in START position. Multimeter should indicate between 4 and 12 VDC.
Shut down generator set. Isolate wire 141A.
Set multimeter for AC volts and connect to terminals 10 and 11 of AC voltage regulator. Start generator set and
operate at rated frequency. Move and hold MASTER SWITCH in START position. Multimeter should indicate
110 to 160 VAC.
Shut down generator set.
Disconnect wire 137A from terminal 5 of AC voltage regulator. Set multimeter for ohms and connect positive lead
to wire 137A and negative lead to terminal 4 of AC voltage regulator. Move VOLTAGE adjust potentiometer to
full counterclockwise position. Multimeter should indicate approximately 0 ohms. Move VOLTAGE adjust poten-
tiometer clockwise slowly while observing multimeter. Multimeter should increase smoothly to approximately
20,000 ohms.
TABLE 4-2. Voltage Adjustment Range (MEP-815A)
Voltage Reconnection Terminal Board Position
Adjustment Range
m.
n.
o.
1 20/208
197-229 volts
240/41
6
395-458 volts
If steps h, j, and l are as indicated above, AC voltage regulator is defective and must be replaced.
Connect aft wires previously disconnected.
Close output box access door.
4-3
