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UGH004/0999 microKool Portable Chiller
TROUBLESHOOTING 6-7
SHUT DOWN
ALARMS
The chiller has detected a problem that could lead to equipment
damage or personal injury if it is not corrected.
◆ The Alarm LED lights and the STOP/RUN LED flashes red.
◆ The chiller turns off the compressor, but normal operation
resumes after you clear the alarm or the problem corrects itself.
◆ The control displays a red LED or alarm code indicating the
source of the problem.
Alarm
The compressor
overload has
tripped.
NOTE: This alarm
is available only on
models with semi-
hermetic compressor
sizes 15 Hp and
above.
The Oil Safety
input is open.
NOTE: This alarm
can be present only
on models with
compressor sizes
15 Hp and above.
Possible cause
Is the correct voltage
supplied to the motor on
the compressor?
Is the overload faulty or
set incorrectly?
Is the compressor faulty?
Oil level in the compres-
sor is low, or the input
has failed.
Solution
Supply voltage should match
the rating on the motor name
plate. If voltage is correct,
check wiring connections.
Disconnect the power and
open the electrical enclosure
for the compressor. Verify that
the overload is set to trip at the
proper amperage, which
should not exceed the FLA.
Manually trip and reset the
overload. If the problem con-
tinues, replace the overload.
Replace the compressor if
supply voltage, wiring and
overload settings are correct,
but the pump continues to
draw excessive current.
See
P
ERFORMING
S
YSTEM
T
ESTS
and perform an
I
NPUT
T
EST
. If
the input is OK, call Conair
service.
Compressor
Oil Safety Alarm