Carrier 48FK Controls Operation And Troubleshooting page 4

LEGEND
T — Thermistor
Field Wiring
Accessory
Fig. 2 — Pin Terminal Connector J1
Thermistor Inputs
Table 2 — Pin Terminal Connector J2
Status Switch Inputs
CONNECTOR J2
STATUS SWITCH
TERMINAL NO.
Oil Pressure,
1,2
Circuit 2
Oil Pressure,
3,4
Circuit 1
Loss Of Charge,
7,8
Circuit 2
Loss of Charge,
9,10
Circuit 1
13,14
Changeover
Compressor Fault
15,20
Signal
Compressor Fault
15,24
Signal
LEGEND
CR — Control Relay
EC — Enthalpy Control
LPS — Low-Pressure Switch
NOTE: Terminal numbers 5, 6, 11, 12, 16-19, and 21-23 are not used
on these units.
UNIT SIZE
034-104
Jumpered
Jumpered
LPS2
LPS1
Economizer
EC
CR2
CR1
LEGEND
CR — Control Relay
EC — Enthalpy Control
LPS — Low-Pressure Switch
Fig. 3 — Pin Terminal Connector J2
Status Switch Inputs
LEGEND
IN — Input
P — Potentiometer
RNT — Return
SW — Switch
Fig. 4 — Pin Terminal Connector J3
Potentiometer Inputs
4
Factory Wiring
Field Wiring
Accessory