Instructions / Assembly
Page 51 mrcool.com
Refrigerant Piping Connection
Before Test Run
Test Run Instructions
List of Checks to Perform Before Test Run
Test Run
10
You should perform the Test Run for at least 30
minutes.
1. Ensure both the liquid and gas stop valves are
fully opened.
2. Connect power to the unit. Then, turn on the
main power switch and allow the unit to warm up.
3. Set the air conditioner to COOL mode.
4. While the system is running, perform the checks
listed in the tables below:
Failure to perform the test run could result
in damage to the unit, property, or personal
injury. Only perform test run after you have
ensure the following steps have been
completed:
• Electrical Safety Checks - Confirm that the
unit’s electrical system is safe and
operating properly.
• Gas Leak Checks - Check all refrigerant
piping/line set connections and confirm
that the system is not leaking.
• Confirm that the gas and liquid (high and
low pressure) stop valves are fully open. If
the valves are not fully opened before the
system is turned on, damage could occur.
A test run must be performed after the entire
system has been completely installed. Complete
and confirm the list of checks below before
performing a test run.
List of Checks to Perform During Test Run
•
•
•
Ensure the room temperature is being
registered/displayed correctly
Check to see that the drainage system
unimpeded and draining smoothly
Ensure there is no vibration or abnormal
noise during operation
Ensure the manual buttons of the indoor air
unit function properly
Ensure refrigerant piping connections
DO NOT leak.
Ensure there is no vibration or abnormal
noise during operation.
Ensure the air current, noise, and water
generated by the unit DO NOT pose a safety
hazard or cause a disruption to your
neighbors.
For Indoor Unit
For Outdoor Unit
•
•
•
•
•
•
•
•
•
•
•
•
•
Refrigeration system and all refrigerant
piping connection points DO NOT leak.
Drainage system is unimpeded and drains to
a safe location.
The indoor & outdoor units are properly
installed.
All piping & wiring are properly connected.
No obstacles are near the inlet and outlet of
the unit that might cause poor performance
or product malfunction.
Heating insulation is properly installed.
Ground wires are properly connected and
system is properly grounded.
Length of the piping and additional
refrigerant stow capacity have been recorded.
Wall Hole Sleeve is packed airtight
Power voltage is the correct voltage for
the unit.
•
Drainage Test Instructions
The drainage test is performed to ensure the drain
pipe flows smoothly. NOTE: Units being installed
in new buildings should have this test
performed before finishing the ceiling.
1. Remove the test cover and add 2000 ml of water
to the tank through the attached tube.
2. Turn on the main power switch and run the air
conditioner in COOL mode.
3. Listen to the sound of the drain pump to see if it
makes any unusual noises.
NOTE: If the unit malfunctions or does not
operate correctly, please refer to the
Troubleshooting section of this manual
before contacting technical support.