FRICK
QUANTUM™LX AcuAir
CONTROL PANEL 090.510-M (OCT 10)
MAINTENANCE Page 9
QUANTUM™ 4 CONTROLLER BOARD
INTRODUCTION
Frick
®
Controls strives to remain on the cutting edge
of microprocessor technology and development.
Because of the ever-increasing speed, memory
features, and power of microprocessors, Frick
®
will
continue to introduce the latest advancement in
microprocessor control technology.
Quantum™ 4
TROUBLESHOOTING THE QUANTUM™ CONTROL
PANEL
This section contains information on troubleshooting
and making corrections to the boards and control
circuits of the Quantum™ 4. Refer to the drawings at
the end of this manual.
GENERAL INFORMATION
The components within the control panel can be
inadvertently damaged by static electricity or
mishandling. Only qualified technicians should
directly handle these components.
1.
DO NOT attempt to make corrections to the
power supply without shutting off the power
to the control panel. Accidental shorts can
irreparably damage the processor boards or
the display screen.
2.
DO NOT HANDLE the panel boards when
their cables are disconnected without first
attaching a properly grounded wrist ground
strap to prevent static electrical discharge
from your body.
Most problems encountered with the microprocessor
and control circuits will be the result of a wiring fault, a
blown fuse, faulty I/O module or failure of a peripheral
control such as a solenoid coil or a pressure
transducer. Faults in the computer, while possible, are
unlikely. If a fault develops in the computer, the
probability is that all functions will cease. The control
system of the compressor consists of an AC (high
voltage) side, which can be either 120 volts, or 230
volts, and a DC (low voltage) side. The AC side
actuates solenoids, relays, alarms, and other
electromechanical functions. The DC side operates
the computer and it's various sensors.
When working within the panel, the AC high
voltage side, which can be either nominal 120
VAC or nominal 230 VAC, CAN CAUSE INJURY
OR DEATH.
To troubleshoot the low-voltage side of the control
circuits, it is necessary to have the following tools:
1.
Accurate digital multi-meter (capable of
reading DC/AC mA to the hundreds place)
2.
Small wire stripper
3.
Small screwdriver (with insulated shaft)
4.
Small snip nose pliers
5.
Wrist Grounding strap
6.
Static free grounded work surface
Note: Proper panel voltage refers to the AC (high
volt-age) that has been supplied to the panel,
which could be either nominal 120 VAC or
nominal 230 VAC (Reference the Control Panel
Power Specifications).
Some problems that are encountered involve
troubleshooting the panels digital inputs and outputs.
The Digital I/O (Input/Output) boards have six Digital
I/O (DIO) board connectors labeled P1 through P6.
The input and output modules are wired into a DIO
connector plug. Position 3 provides power and
position 4 is a neutral on the DIO connectors.
WHAT TO DO BEFORE CALLING THE FACTORY
Many times when a suspected Quantum™ problem is
called in to the factory, not enough information is
provided for the service personnel to assist in solving
the problem. This is because the caller most likely is
not aware of the type of information that would be
useful to factory personnel in helping to identify and
correct the problem. An example of this is the
statement that the Quantum™ is not booting (the
main processor board is not starting). Unfortunately,
this description is usually vague and only means that
nothing is showing on the web browser or the optional
