Woodward Vertex-Pro Installation/Hardware Manual Download

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Vertex-Pro Motor-Driven Compressor Control

Manual 26489V1

Woodward

4.2.2—System Power-Up

If at any time during this procedure the defined or expected result is not
achieved, begin system troubleshooting.

1. Verify that the entire MicroNet Plus control system has been installed.

2. Turn on the power to one power supply and verify that the power supply’s

green LED is the only power supply LED on.

3. Turn off the power to the first power supply and turn on the power to the

second power supply (if a second power supply is present) and verify that the
power supply’s green LED is the only power supply LED on.

4. Toggle the CPU’s RESET switch. The CPU’s red Fault and Watchdog LEDs

should turn off, and the green RUN LED should go on. At this time, the CPU is
performing the self-diagnostic and boot-up processes. When the CPU has
completed its diagnostic tests, all red LEDs on the CPU module or I/O modules
should be off, and the control will begin running the application program.

4.3—Power Supply Troubleshooting

System diagnostic routines continuously monitor each main power supply for
proper operation. If a fault condition is detected, the fault is annunciated. If
necessary, use the power supply’s front panel LEDs to assist in diagnosing any
related problems. If all supply LEDs are off (not illuminated), it is probable that
input power is not present, and verification should be made.

4.3.1—Power Supply LED Descriptions

OK LED

—This green LED turns on to indicate that the power supply is operating

and that 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 the power
supply input specifications.

OVERTEMPERATURE LED

—This red LED gives an early warning of a thermal

shutdown. The LED turns on to indicate that the internal power supply
temperature has exceeded approximately 95 °C. If the internal supply
temperature rises to approximately 100 °C, the supply may shut down. Because
of the many variables involved (ambient temperature, load, thermal conductivity
variations), there is no accurate way of predicting the time between the indication
of overtemperature (LED illuminated) and power supply shutdown.

If this LED is turned on, verify that the fans in the power supply chassis are
turning and free of dust and other obstructions, and that the temperature around
the power supply is less than 55 °C. If the power supply is cooled down without
delay, it can recover from this situation without shutting down. This LED will turn
off once the internal power supply heatsink temperature falls below
approximately 90 °C.