Compu-aire System 2100 Series Installation And Operation Manual page 43

8. System does not de-
humidify or does not do
so sufficiently.
Complaint
9. Display shows
messages that don't
make sense for this
machine.
10. System occasionally
forgets control settings.
Complaint
Control parameters are
not set correctly or are
not set as expected.
Compressors or
chilled water valve
(depending on type
system) is not
operating.
Problem
DIP switches on MCP
are set incorrectly.
Battery is dead.
Excessive noise on the
power supply.
Problem
System seems to
function okay
otherwise.
Display shows
dehumidification but,
compressors are not
running or, for chilled
water systems, the
valve is not open.
Symptom
Display shows function
messages for
equipment not
installed.
If the system is turned
off for a few minutes
and then turned on
again, the set points are
not as they were.
There has been a
thunder storm in the
area or there was a
power outage or brown-
out.
Symptom
43
MCP.
Refer to the section,
Environment Control
Settings, and check that
all control settings are
correct.
Check all items under
5 above.
Action
Refer to the section in
this guide, DIP Switch
Settings, and make sure
the switches are set
correctly.
The battery on the MCP
has an expected life of
at least 5 years. Contact
Compu-Aire for
assistance in replacing
the battery.
Random problems could
be attributed to noise
on the power source
caused by machinery
being switched on and
off, power outages or
thunder storms. These
kinds of problems can
be very difficult to
identify. Make sure all
wiring
Action
connections are secure
and that contactors do
not chatter when
switch-ed. Check that
the sys-tem ground is
properly connected to