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OM 2012
To avoid repetition,
it
wi:!
he a<sunxd
that th.:: reset
svritcl~t(M),
Fig.
?? \,t>s beer-1
pushcd and the load contactor
has been
closed
brfoce commzncir-q
each tc-c!:t.
1. Load confactrv
opxs
dur i:>g
power de livery.
Overvoli-a3c
in-
dicoting
light
ON
.
!.
Load contactcr
opens dur ing
power de livery.
Undervoltage
in-
dicating
light
ON
A. The overvoltage
condition
may have been the resu!t
of a sudden drcp in the
load,
OT po,silie
tampr-
ing with
voltage
regulate
rheastat
(37,
Fig.
l),
and may have been a
norma I action.
B. Defective
over-undervolt-
age scns ing module (K26)
A.An
undervottagc
condition
caused the over-undervolt-
age sensing
moduk
(K26)
to function
ncxmally.
\ * Press reset
switch
(3C>, Fig.
1) and
resuri-
pcv,c: de I ivory .
Obxrvc
voltmeter
(2,
Fig.
1)
to
be cer-
tain volta&
is normal
1'15 V AC.
Adjust
to nocrxrl
if necessary.
If
the load co;;tuctor
is opened aguin
and an overvoltage-
co:;dition
is
indicated
by light
(DS37),
proceed
to step B ,
1. Use yoltagz
adjusting
rhecstat
(37,
Fig.
1) 10 reduce voltage
to 110 V
AC.
Okerve
voltrxter
and grod-
ually
increase
voltage
+ith
rhec-
stat.
if thz
over-unc'xvoltcge
scns~
ing moduk
(K26)
funct icns to opn
the load contactor
at cny value
less than 134 V AC,
it is defective
,
Replace
over-undervoito~e
module
tx complete
protective
re luy troy.
i. Observe
generator
voltage
on volt-
rnzter and adjust
to
nOiiT?Cll
115 V
AC with voltage
reguluto:
rheaztat
(37,
Fig.
1).
Resurnz
normaI cpero.
tion.
If the load coniuctw
opens
again and on undervoltage
condi-
tion
is indicated
by light
(DS38),
ptxeed
to step B.
Aug
25185
:
Trouble
Shooting
Chart
(Sheet
li
Figure
9
3-l
Page 31
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