Hobart Brothers 6910, Operation And Maintenance Manual With Illustrated Parts List

Page: 70 / 206

(2) Check electrical connections for looseness.
NOTE: A darkened terminal generally indicates a loose connection.
4. Electrical System (115-V AC)
The 400-Hz generator and controls are designed to be as maintenance free as possible. No lubrication is
necessary and no periodic maintenance adjustments are required. However, some regular checks should
be made to be sure all controls, instruments, etc., are working properly.
A. Monitoring Instruments
Observe operation of voltmeter, ammeter, and frequency meter each time the unit is started.
Item Protected Location Illustration Size & Type
Instrument panel Engine control Sect. 1-1, Fig.9, 10A Type AGC
lights & engine panel item 13
circuit
Protective relay Protective relay Sect. 1-1, Fig.8, 2A Type AGC
system tray item 17
Voltage regulator Voltage regulator Sect. 1-1, Fig. 10, 5A Type AGC
item 12
Load contactor Protective relay Sect. 1-1, Fig. 8, 2A Type AGC
circuit tray item 16
Fuse Identification Chart
Figure 3
B. Indicating Lights
Check lamps
(bulbs)
in all of the indicating lights at each start up. Fault indicating lights in the protective
relay tray may be tested by pressing test switch (1-1; 8, Fig. 8)
C. Protective Modules
Check operation of all protective modules to make certain they will function if a fault should occur in the
output circuit.
(See 2-3; Para. 3, B.)
OM-2028
2-2 June 20/89 Revised
Page 4