ARMY TM 9-6115-60412
NAVY NAVFAC P-8-633-12
(3)
With humidistat S107 dial set fully clockwise (full on), use a multimeter to check for continuity
across humidistat.
(4)
Replace humidistat S107 if It fails to pass this test.
(5)
Connect wiring to humidistat S101 and discard tags.
(6)
Set MAINTENANCE LOCKOUT switch S100 to OPERATE.
b.
Remove.
(1)
Set MAINTENANCE LOCKOUT switch S100 to MAINTENANCE.
(2)
Tag and disconnect wires to humidistat S107.
(3)
Remove screw and captive washer assemblies to remove humidistat S107.
c.
Install.
.
(1)
Mount humidistat and secure with screw and captive washer assemblies.
(2)
Connect wires and discard tags.
(3)
Set MAINTENANCE LOCKOUT switch S100 to OPERATE.
4-136. ANNUNCIATOR HORN LS1 (2, Figure 2-12). Annunciator horn LS1 provides an audible alarm upon the
tripping of any generator set fault circuit. The alarm may be tested using ANNUNCIATOR TEST pushbutton S15 (5,
Figure 2-3) on upper cabinet A door.
a.
Test.
(1)
Test by using the ANNUNCIATOR TEST pushbutton (5, Figure 2-3). Annunciator horn LS1 should
sound when the button is pressed.
(2)
If annunciator horn LS1 does not sound, open cabinet C door and remove annunciator horn cover
(2, Figure 4-78) by loosening cover locking screw (1).
(3)
Connect a multimeter set to 50 V dc scale across terminals 1 and 2 inside the annunciator horn
housing. With ANNUNCIATOR TEST pushbutton pressed, check for presence of 24 V dc across
terminals. If 24 V dc is not present, trace back through circuit using FO-2 to find the problem If 24 V
dc is present, replace annunciator horn LS1.
b.
Remove. See Figure 4-78.
(1)
Set MAINTENANCE LOCKOUT switch S100 to MAINTENANCE.
(2)
Loosen cover locking screw (1) to remove cover (2).
(3)
Tag and disconnect wires connected to annunciator horn LS1 terminals 1 and 2.
(4)
Remove screw and captive washer assemblies (3) to remove annunciator horn LS1 (4)
(5)
If necessary, remove screw and captive washer assemblies (5) and nut and captive washer
assemblies (6) to remove outlet box (7).
c.
Install. See Figure 4-78.
(1)
If removed, Install outlet box (7) and secure with screw and captive washer assemblies (5) and nut
and captive washer assemblies (6). Install rubber grommet (8).
(2)
Feed wires Into outlet box (7) through hole In grommet (8).
(3)
Connect wires and discard tags.
(4)
Install annunciator horn LS1 (4) and secure with screw and captive washer assemblies (3).
(5)
Install cover (2) and secure by tightening cover locking screw (1).
(6)
Set MAINTENANCE LOCKOUT switch S100 to OPERATE.
4-196
