FRICK
QUANTUM™ COMPRESSOR CONTROL PANEL S90-010 M
MAINTENANCE Page 15
not on, check if the LED on the Digital Board is also not lit.
If the LED is not lit, then check the fuse. If the fuse is OK,
then check the module.
Fuse Testing And Replacement
1. Power off the panel.
2. Open the panel door.
3. Remove the questionable fuse.
4. Place the questionable fuse into the fuse tester at
the one end of each Digital I/O Board (refer to the
Digital Board drawings at the end of this section
for exact fuse tester location).
5. Power on the panel.
6. Check the LED on the tester. If the LED is lit, the
fuse is OK.
7. Power off the panel.
8. If the fuse is faulty, check for external shorts on
the corresponding circuit, the replace the fuse
with a new plug-type fuse (refer to
Recommended Spare Parts list).
Input and Output Module Testing and
Replacement
1. Power off the panel.
2. Open the panel door.
3. Replace the questionable module.
4. Power on the panel.
5. If it is an Output module, check for proper panel
voltage on the DIO connector plug. Check the
voltage between position 4 (neutral) and the
associated position to the Output module.
6. If it is an Input module, check if the associated
LED is on when power is applied to the module.
Troubleshooting an Output
1. Make sure the LED associated with the Output is
on when power is applied to the module.
2. If the LED is not on when it should be and there
is no operating condition preventing it, contact
the Frick
Service Department.
3. If the LED is on when it should be, check for
proper panel voltage on the DIO connector plug.
Check the voltage between the position 4
(neutral) and the associated position to the
Output module.
4. If the voltage is OK, check for proper panel
voltage between the associated position to the
Output module on the DIO connector and the
associated position on the terminal strip.
5. If the voltage is OK, check the wiring external to
the panel.
6. If voltage is not OK, check the fuse.
7. If the fuse is OK then check the module.
8. If the module is OK, check for proper panel
voltage on the DIO connector plug between
position 3 (Hot) and position 4 (neutral).
Troubleshooting an Input
1. Make sure the LED associated with the Input is
on when power is applied to the module.
2. If the LED is on then the fuse and Input module
are good.
3. If the LED is on and there is no input voltage,
replace the Input module.
4. If the LED is not on when power is applied, check
the fuse.
5. If the fuse is good, replace the Input module.
Replacing a Defective Digital Board
The procedure to replace a Digital board is outlined below:
1. Shut off control power.
2. Remove the old board from the machine and the
new board from its packing and place both on an
anti-static surface.
3. Remove any required chip(s) from the defective
board and install them in the replacement board.
4. Check that all jumpers, dipswitches and
components are properly setup on the new board
as it was on the old board (refer to the Digital
Settings tables near the end of this section).
5. Install the modified replacement board in the
panel.
Adding Digital Board 2
The procedure to add Digital Board 2 is outlined below:
1. Remove the new board from its packing and
place it on an antistatic surface.
2. Make sure the board’s dipswitch ID has been set
properly.
3. Check that all jumpers and components are
properly setup.
4. Shut off control power.
5. Install the new board in the panel. See the
Control Center Assembly (refer to the
QUANTUM™ DRAWINGS list for drawing
number) for proper mounting location of the
board.
6. To prevent possible noise problems from
improper wiring:
• When routing wiring to the terminal strip,
keep as much separation as possible
between the Analog boards' wiring and the
AC control wiring of the Digital I/O boards.
• DO NOT run any AC lines parallel to sensor
lines!!
• All DC analog wiring enters the panel on the
left, and all digital wiring enters on the right
side of the panel.
After replacing or installing a Digital Board and powering
on the control panel, select [Detect I/O Boards] from the
“Change Communications” screen in Panel Setup (this
section appears later in this manual). This selection
provides a method to detect all connected Digital and
Analog boards. If a board has been removed, a
communication error shutdown will be issued until this key
is selected. The “About” screen will show what was
detected.
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