Haier GE NS23AM Service Manual page 30

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
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 and not
Common
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 used
DIS
(10K ohm resistor installed)
Discharge Line temperature sensor - not used
DIS
(10K ohm resistor installed)
Outdoor ambient temperature sensor supply
AMB
Outdoor ambient temperature sensor return
AMB
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
checking unit operation. Unit will run at 100%
capacity.
Conventional 24VAC thermostat
1. Install the Charge Mode jumper (before the
Y1 demand)
2. Provide a Y1 demand to the NS23AM
CHRG MODE
3. A blower demand must be provided to
the indoor unit for 100% of the cooling air
volume.
4. Remove the charge mode jumper to end the
charge mode
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.
Table 10. Outdoor Control Terminal Designations and Inputs / Outputs
Description
Page 30
Input Output
Outdoor control – Pin 1 to pin 2 should read 4.5 to
communication 5.55 VDC when not communicating
transmit pin
– Pin 3 to pin 2 should read 4.5 to
5.55 VDC when not communicating
Inverter common
– Pin 4 to pin 2 should read 4.5 to 5.5
VDC
Outdoor control
NOTE - Communication signals
communication
receive pin
may cause volt meter readings
Inverter 5VDC
Communication signals will switch
volts
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
Disabled
CHRG
MODE
Common
N/A
N/A
N/A
N/A
N/A
N/A
Charge Mode
Enabled
CHRG
MODE
31-5000746 Rev. 0