If the engine fails to start within 5 seconds, the control system will automatically
disable the starting motor and indicate a low oil pressure fault. The emergency
stop switch must be pressed to reset the control system and allow another
starting attempt. If the engine fails to start after four attempts, an inspection
should be made to determine the cause.
If the engine fires sufficiently to disengage the starter gear, but does not start,
allow the starting motor to come to a complete stop before attempting to engage
the starter again, then press the start push button switch.
(3)
Check oil pressure to make certain that it is normal, and observe all other engine instruments for
normal operation.
(4)
Allow engine to idle and warm for
3 - 5 minutes
before bringing it up to rated speed.
DO NOT allow the engine to idle for long periods of time.
c. Failed Starting Procedure
In the event that the engine fails to start. The circuitry must be reset before the next attempt. To do
this:
(1)
Push the red
EMERGENCY STOP/RESET BUTTON
on the left side door of the generator set.
(2)
Pull the red
EMERGENCY STOP/RESET BUTTON
back out before the next attempt of starting
the generator set.
d. Power Delivery
(1)
Press engine start push button switch (26, Fig. 1) a second time to bring engine from idle speed
to rated speed. The electric governor will immediately increase engine speed to 2400 RPM and
maintain it. The voltage build-up will occur automatically. Also the green indicating light in the
engine start push-button (26) switch will glow continuously.
(2)
Observe generator instruments. The frequency meter (9, Fig. 1) should indicate exactly 400 Hz.
With voltmeter-ammeter selector switch (18) in any line-to-neutral position, (A-N, B-N, or C-N),
the voltmeter (13) should read 115 volts. With voltmeter-ammeter selector switch in any
line-to-line position, (A-B, B-C, or C-A), the voltmeter should read 200 volts.
The final step in delivering power
is closing one or both of the load contactors. When
satisfactory frequency and voltage values are indicated by the instruments, close either load
contactor (or both load contactors) by momentarily pressing the load contactor control push
button switch (22 and/or 24,). The yellow or orange indicating light of the push button switch that
is pressed will glow at once, to indicate that the load contactor is closed and power is available at
the aircraft. As soon as the light glows, release the push button switch.
(3)
Early in the power delivery run it is recommended that the operator check output voltage and
current in each of the three phases. Use the meter switch (18, Fig. 1) to select the phase and
line-to-line or line-to-neutral voltage. If the load is changing, it is good operating practice to
observe the instruments until load conditions stabilize.
NEVER press the test/reset push button switch while power is being delivered.
The contactors will open and power to the aircraft will be suddenly interrupted.
CAUTION
CAUTION
CAUTION
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
Chapter 1-3
November 27, 1997
Page 4