Johnson Controls Frick QUANTUM Series Maintenance Manual page 36

090.560-M (APRIL 13)
Page 36
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
QUANTUM™ LX CONDENSER/VESSEL CONTROL PANEL
MAINTENANCE
®
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.
6. If you are receiving an Alarm or Shutdown from a
digital input in which the adjacent LED indicator
light is on, check the Digital I/O screen to see if that
channel is turning on and off. If so, 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
components are properly setup on the new
board using the old board as a reference (refer
to the Digital Settings tables near the end of this
section).
5. Install the modifi ed replacement board in the
panel.
After replacing or installing a Digital Board and powering
on the control panel, select User Level 1 or higher, then
select the Setpoints Menu, then the Communications
Menu. On the Communications Screen is a button labeled
as [Redetect I/O Comms]. Clicking on the [Redetect I/O
Comms] button will cause the controller to examine the
internal I/O communications of the panel, and initialize
all connected 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.
all jumpers, dipswitches and