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microKool Portable Chillers UGH004/0999
Turn on the condenser water supply (MPW
units) and check for leaks.
If any leaks appear, stop
the test and fix the problem before continuing. The water
pressure must be at least must be at least 25 PSI at the
condenser inlet.
Apply power to the unit.
◆ Indicator lights on the control panel blink green, then
red, to test operation of the LEDs.
◆ Setpoint and actual windows will display for
three seconds, followed by the software version. The
windows then display the factory default setpoint of
50° F (10° C) and the actual temperature.
Check the rotation of the pump. Remove the
access panel and verify that the pump rotation matches the
direction indicated on the rotation stamp on the pump.
NOTE: If the rotation is incorrect, stop the test and
disconnect power to the unit. Open the electrical
enclosure and switch any two of the three power
source wires on the terminal block. Return to Step 2
and check rotation again.
Replace the access panel.
Press the RUN key to start the unit.
If everything is working correctly:
◆ The RUN/STOP light turns green.
◆ The pump begins operating. The compressor turns on
after 3 seconds, if the actual temperature is above the
setpoint.
◆ Normal operation begins. The unloader valves turn on,
if the actual temperature is below setpoint. The com-
pressor remains active until the actual temperature is
6° F below the setpoint.
The test is over. Proceed to initial setup if the unit operated
normally; refer to the
T
ROUBLESHOOTING
section if it did not.
TESTING THE
INSTALLATION
1
2
3
4
5
WARNING: Only qualified personnel
should perform this procedure.
Parts of this test require opening the unit while it is
energized. Only qualified personnel who have been
trained in the use of electrical testing devices and
in avoiding the safety hazards involved in safely
troubleshooting this type of equipment should per-
form this test procedure.
3-6 INSTALLATION
NOTE: Make sure the
chiller tank is full of
process fluid before you
begin operating.