McQuay PFS 155C, Руководство по эксплуатации и обслуживанию

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18 PFS 155C - 315C OM 135
Status LED’s
There are three status LED’s located on the model 280 controller which will indicate the
microprocessor’s operating condition. When power is first applied to the control panel, the red reset
LED will illuminate for approximately 3 seconds. During this time,
the microprocessor is checking the control software and
performing internal hardware tests. When these tests are
complete the reset LED will turn off and the green running LED
will illuminate indicating the controller’s circuitry and software are
operating correctly. The amber output 0 active LED is associated
with the external alarm output. This LED may or may not be
illuminated at this time based on the setpoints under menu 23.
If the reset LED stays on or the running LED fails to illuminate, disconnect the controller power
by opening circuit breaker CB-1 and re-check the field wiring. Observe the controller’s LED’s while re-
connecting power by closing CB-1. If the green
running LED still does not turn on, a hardware failure
exists or the control software is corrupted. Downloading new control software or replacing the 280
controller should correct the problem.
With the controller powered up and the green running LED illuminated, the backlit panel on the
display module will be illuminated and the unit status menu will be visible. If the display text looks
faded or appears as “blocks” the contrast control needs to be adjusted. Watch the display and
adjusting the contrast control with a small flat-blade screwdriver until the best setting is determined.
Figure 2, Contrast adjustment
KDI BOARD
(back side)
Power
Wiring Ribbon
Cable
Contrast
Adjustment
The MicroTech controller contains factory installed default setpoints which will be appropriate for
most common installations. Step through all of the unit’s setpoints by using the keypad / display and
adjust them as required to meet the specific job requirements. Any faults appearing on the display
should be cleared at this time by pressing the
clear key.
green
red
amber
RUNNING
RESET
ACTIVE
CPU
STATUS
OUTPUT 0