Dial Codes - Lennox MMA018SM4 Service Manual

Remote Control Terminal
(ON-OFF, CN2, Short Connector JR1)
NOTE: Remove the short connector (JR1) when using the ON-OFF function.
Remote Switch
ON (close)
OFF (open)
1. Unit responds to demand; use the remote controller to select the required mode.
2. Unit will not respond to the demand from the remote controller.
NOTE: If the remote switch is off, but the remote controller is on, the CP code appear on the display board.
NOTE: The voltage of the port (CN2) is 12V DC; maximum current is 5mA.

4.5. Dial Codes

NOTE:
The SW4 DIP switch is for certified service technical use only.
No. Dial Code Control
Scenario
1 SW1-2 1,2
2 SW1-3 1,2,3
3 SW2-1 1
4 SW2-1 2
5 SW2-2 2
6 SW2-3 2
1
2
Function
Anti-cold blow protection option
Single cooling / heating and cooling options
Compressor Running (demand working with
heat pump+ Electric heat)
Temperature differential to activate first stage
auxiliary heat(the GAP of T1 and Ts),Wire
controller demand with heat pump+Electric heat
working together
Electric heat on delay
Electric auxiliary heating delay to start time
Unit Status
Unit is on.
Unit is off.
ON
NO
Cooling
Compressor
slower speed
2°F (1°C)
YES
30 minutes
26
Demand Response Time
Within two (2) seconds
Within two (2) seconds
OFF
[Default] YES
[Default] Cooling &
Heating
[Default] Faster Only affects
Compressor compressor and
[Default] 4°F (2°C)
[Default]NO
[Default] 15 Based on SW2-2
minutes
Note
W1
is ON