Double-Check Pipe Connections; Ambient Temperature Is Below 63°F (17°C) - Lennox MCA Series Service Manual

7.5.

Double-Check Pipe Connections

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.
• Using remote control, return unit to the normal
operating temperature.
• Using insulation tape, wrap the indoor refrigerant pipe
connections that you left uncovered during the indoor
unit installation process.
7.6. Ambient Temperature is Below 63°F
(17°C)
You can't use the remote controller to turn on the COOL
function when the ambient temperature is below 17°C. In
this instance, you can use the MANUAL CONTROL button
to test the COOL function.
• Lift the front panel of the indoor unit, and raise it until it
clicks in place.
• The MANUAL CONTROL button is located on the right-
hand side of the unit. Press it one time to select the
COOL function.
• Perform Test Run as normal.
• Push the button once and unit is in auto mode.
Temperature is set at 75°F with no changing of set
temperature..
Figure 17. Manual Button Location
Manual control
button
15