Use and Care Manual
mrcool.com47
TEST RUN
12
CAUTION
Failure to perform the test run may result in unit damage, property damage, or personal injury.
A test run must be performed after the entire system
has been completely installed. Conrm the following
points before performing the test:
a) Indoor and outdoor units are properly installed.
b) Piping and wiring are properly connected.
c) No obstacles near the inlet and outlet of the unit
that might cause poor performance or product
malfunction.
d) Refrigeration system does not leak.
e) Drainage system is unimpeded and draining to a
safe location.
f) Insulation of piping and duct is properly installed.
g) Grounding wires are properly connected.
h) Length of the piping and additional refrigerant
capacity have been recorded.
i) Power voltage is the correct voltage for the system.
1. Open both the liquid and gas service valves.
2. Turn on the main power switch and allow the unit to
warm up.
3. Set the unit to COOL mode.
4. For the Indoor Unit
a. Double check to see if the room temperature
is being registered correctly.
b. Ensure the manual buttons on the indoor
unit work properly.
c. Check to see that the drainage system is
unimpeded and draining smoothly.
d. Ensure there is no vibration or abnormal
noise during operation.
5. For the Outdoor Unit
a. Check for any leaks from the refrigeration
system.
b. Make sure there is no vibration or abnormal
noise during operation.
c. Ensure the wind, noise, and water generated
by the unit do not disturb individuals nearby or
pose a safety hazard.
6. Drainage Test
a. Ensure the drainpipe ows smoothly. New
buildings should perform this test before
nishing the ceiling.
b. Turn on the main power switch and run the
unit in COOL mode.
c. Check to see that the water is discharged.
It may take up to one minute before the unit
begins to drain depending on the drainpipe.
d. Make sure that there are no leaks in any of
the piping.
e. Stop the unit. Turn o the main power switch
and reinstall the test cover.
NOTICE
If the unit malfunctions or does not operate according
to expectations, refer to the Troubleshooting section
of the Service Manual before calling customer service.
12.1 Before Test Run
12.2 Test Run Instructions