Trouble Shooting Chart (Sheet 16 of 20)
Figure 5
TROUBLE, SYMPTOM
TEST, CHECK, AND/OR
AND CONDITION
PROBABLE CAUSE
REMEDY
PROTECTIVE CIRCUIT
NOTE: The protective relays and protective monitor are not completely functional until the load contactor
is CLOSED. Since it is not advisable to vary voltages for test purposes while delivering power to an
aircraft, the generator should be connected to a load bank for trouble shooting the protective circuits.
To avoid repetition, it will be assumed that the reset switch [(36), Fig. 1] has been pushed and the load
contactor has been closed beforecommencing each test.
1. Load contactor
A. The overvoltage con-
A. Press reset switch (36,
opens during power
dition may have been
Fig. 1) and resume power
delivery. Overvoltage
the result of a sudden
delivery. Observe voltmeter
indicating light ON
drop in the load,
(2, Fig. 1) to be certain
or possible tampering
voltage is normal 115 V AC.
with voltage regulator
Adjust to normal if necessary.
rheostat, and
If the load contactor
may have been a
is opened again and an over-
normal action.
voltage condition is indicated
by light (DS 37), proceed
to step B.
B. Defective over-under-
B. Use voltage adjusting rheostat
voltage sensing module
to reduce voltage
(K26)
to 110 V AC. Observe
voltmeter and gradually
increase voltage with rheostat.
If the over-under-
voltage sensing module (K26)
functions to open the load
contactor at any value less
than 134 V AC, it is defective.
Replace over-undervoltage
module or complete
protective relay tray.
2. Load contactor
A. An undervoltage con-
A. Observe generator voltage on
opens during power
dition caused the
voltmeter and adjust to normal
delivery. Under-
over-undervoltage
115 V AC with voltage
voltage indicating
sensing module (K26)
regulator rheostat.
light ON.
to function normally.
Resume normal operation.
If the load contactor
opens again and an undervoltage
condition is indi-
cated by light (DS38), proceed
OM-2028
3-1
June 20/89 Revised
Page 24
Содержание 6910
Страница 2: ...This page intentionally left blank ...
Страница 14: ...This page intentionally left blank OM 2028 Introduction June 20 89 Revised Page 2 ...
Страница 40: ...This page intentionally left blank OM 2028 1 1 May 1 91 Revised Page 26 ...
Страница 66: ...Engine Control Panel in Tilt out Position Figure 6 OM 2028 2 1 August 31 90 Revised Page 12 ...
Страница 72: ...This page intentionally left blank OM 2028 2 2 June 20 89 Revised Page 6 ...
Страница 100: ...Test Receptacle Connector Termi nals Identification Figure 4 OM 2028 3 1 June 20 89 Revised Page 8 ...
Страница 128: ...Generator Set Figure 1 OM 2028 4 3 May 1 91 Revised Page 2 ...
Страница 130: ...Canopy Assembly Figure 2 OM 2028 4 3 May 1 91 Revised Page 4 ...
Страница 132: ...This page intentionally left blank OM 2028 4 3 May 1 91 Revised Page 6 ...
Страница 134: ...Generator Set Without Canopy Figure 3 OM 2028 4 3 May 1 91 Revised Page 8 ...
Страница 136: ...This page intentionally left blank OM 2028 4 3 May 1 91 Revised Page 10 ...
Страница 138: ...Radiator and Cooling System Group Figure 4 OM 2028 4 3 May 1 91 Revised Page 12 ...
Страница 140: ...Air Cleaner Assembly For units manufactured before and during August 1990 Figure 5 OM 2028 4 3 May 1 91 Revised Page 14 ...
Страница 142: ...Electric Governor Kit Figure 6 OM 2028 4 3 May 1 91 Revised Page 16 ...
Страница 144: ...Fuel Lines Assembly Figure 7 OM 2028 4 3 May 1 91 Revised Page 18 ...
Страница 146: ...Oil Line Assembly Figure 8 OM 2028 4 3 May 1 91 Revised Page 20 ...
Страница 148: ...Stator Terminal Panel Assembly Figure 9 OM 2028 4 3 May 1 91 Revised Page 22 ...
Страница 150: ...Power Module Panel Assembly Figure 10 OM 2028 4 3 May 1 91 Revised Page 24 ...
Страница 152: ...Control Box Assembly Figure 11 OM 2028 4 3 May 1 91 Revised Page 26 ...
Страница 154: ...Generator Controls Tray Assembly Figure 12 OM 2028 4 3 May 1 91 Revised Page 28 ...
Страница 156: ...Protective Relays Tray Assembly Figure 13 OM 2028 4 3 May 1 91 Revised Page 30 ...
Страница 158: ...Control Box and Internal Components Group Figure 14 OM 2028 4 3 May 1 91 Revised Page 32 ...
Страница 160: ...Engine Control Panel Assembly Figure 15 OM 2028 4 3 May 1 91 Revised Page 34 ...
Страница 162: ...This page intentionally left blank OM 2028 4 3 May 1 91 Revised Page 36 ...
Страница 164: ...Output Terminal Board Assembly Figure 16 OM 2028 4 3 May 1 91 Revised Page 38 ...
Страница 166: ...Generator Assembly Figure 17 OM 2028 4 3 May 1 91 Revised Page 40 ...
Страница 168: ...Mounting Frame Assembly and Lifting Yoke Figure 18 OM 2028 4 3 May 1 91 Revised Page 42 ...
Страница 170: ...Water Heater Figure 19 OM 2028 4 3 May 1 91 Revised Page 44 ...
Страница 172: ...This page intentionally left blank OM 2028 4 3 May 1 91 Revised Page 46 ...
Страница 174: ...This page intentionally left blank OM 2028 5 0 May 1 91 Revised Page 2 ...
Страница 176: ...This page intentionally left blank OM 2028 6 0 June 20 89 Revised Page 2 ...
Страница 177: ... I I I I I l zE I I 01 39NVN jlOVlQ t __ ...
Страница 178: ......
Страница 179: ......
Страница 180: ......
Страница 181: ......
Страница 182: ......
Страница 183: ......
Страница 184: ......
Страница 186: ......
Страница 187: ......
Страница 188: ......
Страница 189: ......
Страница 190: ......
Страница 191: ......
Страница 192: ......
Страница 193: ......
Страница 194: ......
Страница 195: ......
Страница 196: ......
Страница 198: ......
Страница 199: ......
Страница 200: ......
Страница 201: ......
Страница 202: ......
Страница 203: ......
Страница 204: ......
Страница 205: ......
Страница 206: ......