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 TM5-4120-384-14
4-28.
-
Continued
Test.
a.
(1)
Disconnect
power
at
power
source.
(2)
See
and
remove
control
module.
(3) Remove top front cover on F18H-3S and F18H-1S or top
cover on F18H-3SA and F18H-3SB (para 4-11).
(4)
Remove seven screws
and
lock
washers
and
carefully
slide
junction
box out of unit.
(5)
K2
and
K3.
(a) Apply
28VDC
to
terminals
X1
and
X2;
X1
is
positive,
X2
is
negative.
(b) Check continuity across terminals A1 and A2; B1 and B2,
and C1 and C2.
The multimeter must show that contacts are closed.
(c)
Remove
power.
Multimeter
must
show
that
contacts
are
open.
(6)
K4
and
KS.
(a)
Apply
28VDC
to
terminals
2
and
9;
2
is
positive,
9
is
negative.
(b) Check
across
terminals,
1
and
3;
5
and
11:
and 10 and 8.
(c) Read Multimeter.
It should indicate that terminals 1
and 3, 5 and 11, a n d 1 0 a n d 8 a r e c l o s e d .
Terminals 1 and 4, 5 and
6, and 10 and 7 are open.
(d) Remove 28VDC power.
Multimeter should indicate that
terminals 1 and 4, 5 and 6, and 10 and 7 are closed and that
terminals 1 and 3, 5 and 11, and 10 and 8 are open.
(7)
Time
delay
relay
K1.
(a)
Connect
multimeter
to
terminal
A1
and
A2
of
relay
K3.
(b) Apply +28VDC to terminal 2 of K1 and 28VDC ground to
terminal X2 of K3.
Terminal 2 of K1 is positive and terminal X2
of
K3 is negative.
4-81
Change 2
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