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GENERAL INFORMATION
The components within the control panel can be
inadvertently damaged by static electricity or mis-
handling. Only qualifi ed 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 without
fi rst attaching a properly grounded wrist
ground strap to prevent static electrical dis-
charge from your body.
Most problems encountered with the microproces-
sor 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 pres-
sure transducer. Faults in the computer, while pos-
sible, are unlikely. If a fault develops in the computer,
the probability is that all functions will cease and the
display screen will go blank. The control system of
the compressor consists of an AC side, which can
be either 120 volts, or 230 volts, and a DC side. The
AC side actuates solenoids, relays, alarms, and other
electromechanical functions. The DC side operates
the computer and its various sensors.
When working within the panel, the AC side, which
can be either nominal 120 VAC or nominal 230 VAC,
CAN CAUSE INJURY OR DEATH.
To troubleshoot the DC side of the control circuits, it
will be necessary to have at least the following tools:
1.
Accurate digital multimeter (capable of
reading to DC/AC, mA to the hundreds
place)
2.
Small wire stripper
3.
Small screwdriver (with insulated shaft)
4.
Small snip nose pliers
NOTE 1: Proper panel voltage refers to the AC that
has been supplied to the panel, which could be either
nominal 120 VAC or nominal 230 VAC (Reference the
Control Panel Power Specifi cations).
NOTE 2: When working with and around the various
QUANTUM™ HD COMPRESSOR CONTROL PANEL
MAINTENANCE
circuit boards inside the control panel, it is recom-
mended to prevent static build-up and discharge to
these boards by keeping yourself properly grounded.
This can be accomplished by the utilization of the fol-
lowing items:
1.
Wrist Grounding strap
2.
Static free grounded work surface
WHAT TO DO BEFORE CALLING THE FACTORY
On occasions when a suspected Quantum™ problem
is called in to a service representative, not enough
information is provided for the service personnel to
assist in solving the problem. This is most likely be-
cause the caller is not aware of the type of infor-
mation that would be useful to service personnel in
helping to identify and correct the problem. An ex-
ample of this is the statement that the Quantum™ is
not booting (the main processor board is not start-
ing). Unfortunately, this description is usually vague
and only means that there is nothing on the display.
A blank screen could be the result of something else.
The following is a list of possible reasons for no dis-
play:
•
No power
•
Loose or Faulty Display Cable or Inverter
Cable
•
Defective Display
•
Defective Backlight Inverter
•
Defective Backlight LED Tube
•
Wrong Combination of Display, Cable, or
Software
•
Faulty CPU Board
Before calling your Frick factor service representative
for assistance, you may choose to review the infor-
mation on the following pages to discover and re-
solve your issue. The actual cause of most problems
will not be with the Q5 processor board itself, but
with something external. However, on the rare oc-
casion that the problem has been identifi ed as being
the Q5 processor board, use Section 3 as a guideline
for replacing it.
090.040-M (MAR 12)
Page 7
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Table of Contents
Troubleshooting
