QUANTUM™ LX EVAPORATOR CONTROL PANEL
OPERATION
090.610-O (MAR 2016)
Page 23
TROUBLESHOOTING
The following section will help to identify some common prob-
lems that may arise within an Evaporator system. Use this sec-
tion in conjunction with the 090.610-M (Maintenance) manual.
Operator Interface Panel
1. Quantum™ controller does not have any LED’s lit:
• Check for the presence of 120 VAC power
at the incoming AC terminal strip. (see the
section entitled CHECKING THE AC POWER)
• Check for the presence of proper DC power
to the Quantum™ (refer to the 090-610 M
manual under the section entitled QUAN-
TUM™ LX CONTROL PANEL POWER SUP-
PLY.
• If the Quantum™ controller has proper DC
voltage applied, then with turn the control
power OFF, remove the program ash card,
and recycle the power. If the LED’s do not
start their booting pattern, continue to the
next step.
• Try disconnecting all cables one at a time
(with the exception of the DC power). If the
LED’s start ashing normally, then recon-
nect the removed cables one at a time, until
the problem reappears, then troubleshoot
that cable.
• If the DC power to the Quantum™ controller
is normal, and the cables from the previous
step had all been removed without correct-
ing the problem, then the board will need
replaced.
2. Quantum™ appears to boot normally, but nothing
shows on the display:
• Ensure that the display cable is securely
plugged in at both ends.
• For the Q4 controller only, Verify that jump-
ers LK3 and LK4 are set properly. Both links
should be set to position B.
• Ensure that the connectors on both ends of
backlight inverter board are plugged in se-
curely. Use caution when checking around
the inverter, as high DC voltage is present
when the control power is ON.
• Shine a ashlight onto the display screen
at an angle. If the Quantum™ has properly
booted, you should see some text dimly
shown on the screen. If it appears as though
there IS something being displayed, but it is
not visible, then there is a problem with the
backlight, the inverter, cable or Quantum™.
Remote Panels
1. LED’s are not lit on one or more I/O boards within the
panel.
• Ensure that both HOA modules have their cir-
cuit breakers engaged (see the section entitled
CHECKING THE AC POWER).
• If both breakers are engaged, check the incom-
ing 120 VAC power. (see the section entitled
CHECKING THE AC POWER)
• If AC power is correct, and breakers are en-
gaged, measure the DC voltage to the ques-
tionable board(s) as described in the Digital or
Analog board sections of the 090-610 M (Main-
tenance) manual.
• If DC power to the questionable board(s) is good,
replace the board.
2. One or more of the boards within a Remote Panel are
not being detected on the About screen:
• Refer to the Evaporator System Communications
Wiring Diagram and verify that the board DIP-
SWITCH settings are correct.
• Verify that the communications wiring polarity is
correct.
• Push the [Redetect] button on the About screen
to see if the failing board is now redetected.
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