Woodward MicroNet TMR 5009, Installation/Hardware Manual

Page: 78 / 118

5009 Installation/Hardware Manual 85580V2
70 Woodward
Chapter 5.
Troubleshooting and Module
Replacement
Introduction
This chapter provides detailed information on system hardware, gives tips to
assist in solving hardware related issues, and includes module replacement
instructions. Once a system problem is annunciated, this chapter can be utilized
as a troubleshooting guide to assist problem finding and if necessary module
replacement.
Because testing all functions of an individual module is beyond the scope of this
manual, when the results of the procedures indicate that a module may be faulty,
replace the suspected module with a module known to be good. This will help
verify that the cause of the problem actually is in the suspected module.
If after following this chapter’s guidance the cause of a problem cannot be found,
contact the Woodward technical assistance group.
CAUTION—QUALIFIED PERSONNEL
Only qualified service personnel should perform the following module
replacement procedures.
Main Power Supply
System diagnostic routines continuously monitor each main power supply for
proper operation. If a fault condition is detected, the fault is annunciated, and the
supply’s output disabled. If necessary, use the power supply’s front panel LEDs
to assist in diagnosing a related problem. If all supply LEDs are turned off (not
illuminated), it is probable that input power is not present and verification should
be made.
Main Power Supply LED descriptions:
OK LED
—This green LED turns on to indicate that the power supply is operating
and no faults are present.
INPUT FAULT LED
—This red LED turns on to indicate that the input voltage is
either above or below the specified input range. If this LED is on, check the input
voltage and correct the problem. Long-term operation with incorrect input
voltages may permanently damage the power supply. Once the input voltage is
within the supply’s input specifications, this LED will turn off. Refer to Table 4-1
for power supply input specifications.