Installation Manual
Page 36mrcool.com
Testing
DOUBLE-CHECK PIPE CONNECTIONS
IF AMBIENT TEMPERATURE IS BELOW 
63°F (17°C)
5.  After the Test Run is successfully complete, and 
Perform have PASSED, do the following: 
 a. 
operating temperature.
 b.
refrigerant pipe connections that you left uncovered 
during the indoor unit installation process.
Fig. 8.1
Manual control button
During operation, the pressure of the refrigerant 
circuit will increase. This may reveal leaks that 
were not present during your initial leak check. 
Take time during the Test Run to double-check 
that all refrigerant pipe connection points do not 
have leaks. Refer to 
Gas Leak Check section for 
instructions.
You cannot use the remote controller to turn 
on the COOL function when the ambient 
temperature is below 63°F (17°C). In this
instance you can use the MANUAL CONTROL 
button to test the COOL function.
1. Lift the front panel of the indoor unit, and 
raise it until it clicks in place.
2. The MANUAL CONTROL button is located
on the right-hand side of the unit. Press it twice 
to select the COOL function (See ).
Fig
.
8.1
3. Perform Test Run as normal.










