Lennox EL23XCV Series Manual page 33

Table 6 continued
WARNING - Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and
local codes. The 4 pins in P6 have the potential of transferring up to 250 volts to the unit cabinet ground.
Designator Description
Transmit data to inverter, connects to Rx of
P6 - Pin 1 Tx
inverter
Inverter common
Inverter
P6 - Pin2 NOTE – This is a signal reference point
Common
and not an earth ground.
Receive data from the inverter
P6 - Pin 3 Rx
Connects to Tx of inverter
P6 - Pin 4 Inv 5V Inverter 5VDC volts
Discharge Line temperature sensor - not
DIS
used (10K ohm resistor installed)
Discharge Line temperature sensor - not
DIS
used (10K ohm resistor installed)
Outdoor ambient temperature sensor
AMB
supply
Outdoor ambient temperature sensor
AMB
return
Outdoor coil temperature sensor - not used
COIL
(10K ohm resistor installed)
Outdoor coil temperature sensor - not used
COIL
(10K ohm resistor installed)
Charge Mode function. Can be used when
charging, checking charge, pump down or check-
ing unit operation. Unit will run at 100% capacity.
Conventional 24VAC thermostat
1. Install the Charge Mode jumper (before the Y1
2. Provide a Y1 demand to the EL23XCV
3. A blower demand must be provided to the in-
4. Remove the charge mode jumper to end the
CHRG MODE
S30 Communicating Thermostat
1. Install the Charge Mode jumper
2. Unit will start and run at 100% capacity and
4. Remove the charge mode jumper to end the
NOTE - If the charge mode jumper is in the ON
position during power-up, it is ignored.
NOTE - If the charge mode is left in place, it will
be ignored after 60 minutes.
Outdoor Control Terminal Designations and Inputs / Outputs
demand)
door unit for 100% of the cooling air volume.
charge mode
communicate to the indoor unit to bring on the
blower at 100% of the cooling air volume.
charge mode
Input
Outdoor control
communication
transmit pin
Inverter common
Outdoor control
communication
receive pin
Inverter 5VDC volts
N/A
N/A
N/A
N/A
N/A
N/A
Charge Mode
Disabled
CHRG
MODE
Page 33
Output Common
– Pin 1 to pin 2 should read 4.5 to 5.55
VDC when not communicating
– Pin 3 to pin 2 should read 4.5 to 5.55
VDC when not communicating
– Pin 4 to pin 2 should read 4.5 to 5.5 VDC
NOTE - Communication signals switch off
and on rapidly. This may cause volt meter
readings to fluctuate. This is normal. Com-
munication signals will switch between
this 5V and common (Pin 2).
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
Charge Mode
Enabled
CHRG
MODE