(g) Install annunciator (13) by securing
brackets (12) using screws (10) and
(h) Connect wires to terminal boards,
then remove wire tags.
15-11. FLASHER FC1. The flasher (23, figure 15-3) is
plugged into terminal block (22) which is mounted on the
plate assembly (30) with two screws (20) and nuts (25).
Test the flasher by connecting it in series with a 24V DC
power source and test lamp. The test lamp should flash
on and off; otherwise the flasher is defective and should
15-12. TRANSFORMER T103 (29, figure 15-3).
a. Remove phase shift transformer T103 as
(1) Tag and disconnect lead wires.
(2) Remove screws (27) and nuts (28) and
remove T103 (29).
b. Test transformer T103 in accordance with
procedures in paragraph 5-3 b.
c. Install T103 as follows:
(1) Secure transformer T103 to plate (30)
using screws (27) and nuts (28).
(2) Connect wires and remove tags.
15-13. RESISTOR R30 (14, figure 15-3).
a. Remove R30 (14) from terminal block (19) by
removing screws (17).
b. Use an ohmmeter to test R30 for resistance of
39,000 ohms ±5 percent. Replace R30 if
specified resistance value is not met.
c. Install resistor R30 (14) onto terminal block (19)
using screws (17).
15-14. DIODE CR36 (15, figure 15-3).
a. Disconnect one end of the diode (15) by
removing screw (17).
b. Connect an ohmmeter (scale set at Rx100)
across the diode, and note reading.
c. Reverse ohmmeter leads to the diode, and again
note reading. A good diode will read high
resistance one way and low resistance the other
way. A shorted diode will read full scale both
ways. An open diode will read infinity (no
reading, in either direction.
d. Remove shorted or open diode (15) by removing
remaining screw (17).
e. Reconnect lead of good diode, or install new
diode with screws (17).
Section III. MAINTENANCE OF AUTOMATIC CONTROL MODULE
15-15. GENERAL. the Automatic Control Module can
automatically control up to four generator sets by
monitoring the utility bus voltage and frequency. If
voltage should vary by ±10 percent or frequency should
vary by ±3 percent the module will start the generators,
open the utility breaker and sequentially load generators.
The troubleshooting procedure contained in Table 5-5 and
5-6 of the Operator and Organizational Maintenance
manual isolates most faults that may occur. Test and
adjustment procedures are contained in this section.
15-16. UNDER/OVERVOLTAGE DEVICE. There is one
under/over voltage device. The device is preset for a ±10
percent deviation in the 120V AC bus sensing power. The
device is adjustable within the range specified in the
tabulated data in Chapter 1 of the Operator and
Organizational Maintenance manual. Trip settings are
made by removing protective plastic caps on front of the
device and turning adjustment screws beneath caps. A
clockwise rotation of adjustment screw will increase trip
point. Figure 15-9 shows component layout of Automatic