Lennox MWCB Series User Manual Download Page 4

4

Operation (Manual) - Force Cooling Mode

In the event that your remote control fails to work, your unit 

can be operated manually with the MANUAL CONTROL 

button located on the indoor unit. 

Figure 4.  AUTO/COOL Control Button

IMPORTANT

Unit must be turned off before using AUTO/COOL 

operation procedures.

To operate your unit manually:

1. 

Open the front panel of the indoor unit.

2. 

Locate the 

AUTO/COOL

 button on the right-hand side 

of the unit.

3. 

Press the 

AUTO/COOL

 button to activate 

FORCED 

AUTO

 mode. Both FORCE HEATING and COOLING is 

preset to 75ºF (24ºC) and cannot be manually adjusted.

4. 

Press the 

AUTO/COOL

  button  second  time  to  five 

seconds to activate 

FORCED COOLING

 mode. The 

compressor  and  outdoor  fan  keep  running  (fixed  at 

rated frequency), and the indoor fan runs at high speed 

(80%). Force cooling mode is preset to 75ºF (24ºC) and 

cannot be manually adjusted.

NOTE: 

When system receives signals, such as switch on, 

switch off, timer on, timer off, mode setting, fan 

speed setting, sleep mode setting and follow me 

setting, the forced operation will stop.

5. 

Press the 

AUTO/COOL

  button  a  third  time  for  five 

seconds to activate 

FORCE DEFROSTING

 mode 

(applicable to heat pump systems only). Indoor fan will 

stop, defrosting lamp will light on.

6. 

Press the 

AUTO/COOL

 button again for 5 seconds to 

turn the unit off.

7. 

Close the front panel.

Operation (Wireless Remote Controller)

IMPORTANT!

Frequent changes to operating mode may cause system 

malfunction. Allow at least one minute between mode 

changes for the system to stabilize. 

Requirements

Using the remote controller 

•  Point the remote controller directly at the indoor unit.
•  Stand within 26 feet (8 meters) of the indoor unit.
•  Do not block the signal between the remote controller 

and indoor unit. 

NOTE: 

The remote controller will not function without a 

clear line of sight to the indoor unit.

•  Do not submerge the remote controller in liquid.
•  Do not expose to direct sunlight.
•  Do not drop or step on remote controller. 
Remote control holder 

Use field-provided fasteners to attach the remote controller 

holder to any suitable vertical surface such as a wall.

Remote Control Specifications

Table 2. 

Specifications

Rated voltage

3.0 VDC (2 AAA batteries)

Min voltage for sending signal 

to CPU

2.4 VDC

Effective transmitting distance 26 feet (8 meters)
Operation conditions

23°F to 140°F (-5 to 60°C)

Summary of Contents for MWCB Series

Page 1: ...Screen Indicators 6 Wireless Remote Controller Operation 7 Wireless Remote Controller Set Button Function 7 Troubleshooting 8 FCC Compliance Statement PART 15 19 8 THIS MANUAL MUST BE LEFT WITH THE OWNER FOR FUTURE REFERENCE Optimal Performance Optimal performance for the COOL HEAT and DRY modes can be achieved in the following temperature ranges When your system is used outside of these ranges ce...

Page 2: ... either the indoor or outdoor unit Do not remove the outdoor unit fan guard for any reason CAUTION If outdoor unit is installed on a raised stand check condition of stand occasionally to ensure that it remains stable Do NOT install sprinklers or soaker hoses where they can expose the outdoor unit to treated water Prolonged exposure to treated water will corrode the surface of the steel and aluminu...

Page 3: ... Cooling operation Set horizontal louvers outward Auto swing operation Set louvers to swing up and down automatically Figure 2 Louver Operation Refer to the wireless remote control section on using the swing and direct buttons Return Air Filters Blocked or dirty return air filters affect system oper ation and efficiency Air filters should be checked monthly in order to ensure proper air flow to th...

Page 4: ...UTO COOL button a third time for five seconds to activate FORCE DEFROSTING mode applicable to heat pump systems only Indoor fan will stop defrosting lamp will light on 6 Press the AUTO COOL button again for 5 seconds to turn the unit off 7 Close the front panel Operation Wireless Remote Controller IMPORTANT Frequent changes to operating mode may cause system malfunction Allow at least one minute b...

Page 5: ...75 F unit operation if setpoint is lower Sets fan to Auto operation if setpoint is over 75 F NOTE If setpoint is manually changed to less than 75 F ECO operation is canceled GEAR Operation Reduces electrical consumption to 75 or 50 8 OK Button Confirms selected function 9 TIMER Button a Initiates an auto on or auto off time sequence b Press TIMER button to initiate the ON time sequence c Press the...

Page 6: ...tion flashing Note All icons are shown for display purposes only During actual unit operation only active icons are displayed Displays when LOCK feature is activated Silence LOW MED HIGH AUTO Lights up when remote sends signal to indoor unit Displays selected fan speed Displays the current including mode 2 20 21 40 41 60 61 80 81 100 1 NOTE Fan speed cannot be adjusted in AUTO or DRY mode Displays...

Page 7: ...ds to activate Lock function All buttons will not response except pressing the same two buttons for two seconds again to disable locking Swing Function 1 Press the SWING button to activate up down louver operation Louvers oscillate up and down automatically 2 Press and hold the SWING button again to disable NOTE Pressing the SWING button multiple times will set the louvers at five different fixed ...

Page 8: ...ing at 2Hz FCC Compliance Statement PART 15 19 PART 15 19 This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 This device must accept any interference received including interference that may cause undesired operation FCC Interference Statement PART 15 105 B 3 This equipment has been tested a...

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