Lennox MMDB Service Manual

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3.11. 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.
Manual control
button
AUTO COOL
Figure 13. Manual Control Button Location
• 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 2 times 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..

Lennox MMDB Specifications

General

Brand	Lennox
Model	MMDB
Category	Air Conditioner
Language	English