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When there is a problem that makes no sense due to un-
explainable things happening, check the following:
1.
Were the recommendations for Electrical Instal-
lation followed? (See Frick publication 090.400-
SB).
2.
Is the panel powered by an isolating power
source such as a control power transformer in
the motor starter panel?
3.
Verify that the panel is not powered from a light-
ing or utility panel.
4.
Did the unit ever work properly?
•
If the unit used to work properly, try to de-
termine when the problem fi rst showed up.
5.
It is important to know if the problem occurs
randomly, frequently, at the same time everyday
or all the time.
6.
Check what the temperature is in the engine
room and at the panel. Is it very hot (>110 F) or
very cold (<32 F)?
•
Make sure that the motor is not blowing ex-
haust air on the control panel.
7.
If the problem just started occurring, was there
recently a severe lightning storm, fi re, fl ood, or
a plant accident:
•
Has any water, refrigerant, or oil leaked into
the panel or any conduit?
8.
If the problem just started occurring, then check
if anything was recently changed in the system
(i.e. software or hardware.)
9.
If the problem just started occurring, then check
if any service was recently done to the compres-
sor or its electrical system?
10. If there is communication wiring connecting the
panel to another panel or device, then check the
following:
•
If the Quantum™ is unexplainably shutting
down, try disconnecting the communica-
tions cable to see if the problem goes away.
•
Check if the communications cable shields
are tied to machine ground at only one loca-
tion. For a PLC or Opto22 based system, the
shield should normally be tied only at the
PLC or Opto22 panel.
•
Check that you are using the Frickrecom-
QUANTUM™ HD COMPRESSOR CONTROL PANEL
MAINTENANCE
SECTION 8
TROUBLESHOOTING
mended communications cable.
11. Is the plant wiring up to code? (See Frick publi-
cation 090.400-SB)
12. Do you have power wiring (>50V) mixed with
control, sensor or communications wiring?
13. Check that the starter panel is grounded to the
plant transformer. There are usually four wires: 3
for the 3 phases and 1 for plant ground.
14. Check that the motor is grounded to the start-
er panel. There are usually four wires: 3 for the
phases and 1 for ground.
15. Ensure that one side of the motor current trans-
former is grounded in the motor starter panel.
The wire to the control panel terminal #2 is usu-
ally the only one grounded.
16. Check that the pressure transducers are properly
grounded.
17. Check that temperature transducers are properly
grounded.
18. Check to see if one of the temperature probes
have a signal wire shorted to machine ground.
19. Check that all inductive loads (i.e. coils, so-
lenoids, or relays, etc.) connected to the I/O
output modules have surge suppressors across
them, preferably at the devices. The larger fac-
tory installed inductive loads will have surge
suppressors as well.
20. Make sure that you have a continuous ground
back to the power source (plant transformer).
The ground connection must be aluminum or
copper. A conduit ground will not work. Do not
drive a ground stake at the compressor since ex-
traneous currents will be attracted to the com-
pressor.
21. Make sure that there is no AC wiring lying next to
any printed circuit board.
22. Unexplainable compressor auxiliary failures are
usually indicative of noise due to wiring prob-
lems (i.e. incorrect earth grounds, mixed power
and control wiring, unsuppressed coils, etc)
23. If the compressor is unexplainably shutting down,
check if the machine shares control transformer
power with something else. Make sure each
compressor has its own isolation transformer in
the motor control center off the three-phase bus
with the secondary properly grounded.
090.040-M (MAR 12)
Page 57
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Table of Contents
Troubleshooting
