Trouble Shooting Chart (Sheet 18 of 20)
Figure 4
TROUBLE, SYMPTOM
TEST, CHECK, AND/OR
AND CONDITION
PROBABLE CAUSE
REMEDY
PROTECTIVE CIRCUIT (CONTINUED)
4. Load contactor
A. Electric governor
B. Proceed as follows:
opens during power
improperly adjusted,
delivery. Under-
or malfunctioning
frequency light ON.
(1) Governor improperly
(1) Adjust in accordance
adjusted
with Sect. 2-3, Para. 3.
(2) Electric governor
(2) Check and adjust or re-
system malfunc-
pair in accordance with
tioning
ENGINE AND CONTROLS,
Troubles 8 and 9.
B. Defective over-under-
B. If overfrequency nuisance
frequency sensing
tripping continues after the
module (K27)
governor system is proven to
be good, and an underfre-
quency condition does not
exist, replace over-under-
frequency relay, or complete
protective relay tray.
5. Load contactor
A. There may have been
A. Observe ammeter (4, Fig. 1).
opens during power
an overload condition
Check for abnormal overload
delivery. Overload
which caused the
condition and correct. If
indi cating
overload device (K4)
overload device functions to
light ON.
to function normally.
open the load contactor when
an overload does not exist,
proceed to step B.
B. One of the resistors
B. An open resistor will cause
(R26, R27, or R28)
a higher than normal volt-
across overload
age. Check resistors (Sect.
transformers is open
1-1; 1, Fig. 11). Replace if
circuited.
defective.
C. Overload device
C. Check voltage at terminal E,
printed circuit board
Fig. 8. If 12-V DC, replace
OM-2029
3-1
September 30/89 Revised
Page 24
Содержание 140GT17K
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Страница 87: ...Electric Governor Controller Illustration and Connection Diagram Figure 6 March 16 90 2 3 Page 13 OM 2029 ...
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Страница 128: ...Canopy Assembly Figure 2 OM 2029 4 3 September 30 89 Revised Page 4 ...
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Страница 134: ...Radiator and Cooling System Group Figure 4 OM 2029 4 3 September 30 89 Revised Page 10 ...
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Страница 138: ...Electric Governor Kit Figure 6 OM 2029 4 3 September 30 89 Revised Page 14 ...
Страница 140: ...Panel Engine Control Assembly Figure 7 OM 2029 4 3 September 30 89 Revised Page 16 ...
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Страница 152: ...Fuel Line Assembly Figure 12 OM 2029 4 3 September 30 89 Revised Page 28 ...
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Страница 164: ...Solid State Voltage Regulator Assembly Part No 489812A Figure 15 4 3 July 27 90 Page 40 OM 2029 ...
Страница 166: ...Magnetic Amplifier Voltage Regulator Assembly Part No 281407 Figure 16 4 3 July 27 90 Page 42 OM 2029 ...
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