Table 115 -- Main Control Board (MBB) Inputs and Outputs
POINT POINT DESCRIPTION I/O POINT PLUG AND PIN SIGNAL PIN(S) PORT STATE
NAME NAME REFERENCE
INPUTS
GASFAN YAC Indoor Fan relay (fan request from YAC) DI1 36, 3-4 4 0 = 24vac, 1= 0vac
FSD Fire Shutdown switch input DI2 J6, 5-6 6 0 = 24vac, 1= 0vac
G Thermostat 'G' input DI3 J7, 1-2 2 0 = 24vac, 1= 0vac
W2 Thermostat 'W2' input DI4 J7, 3-4 4 0 = 24vac, 1= 0vac
Wl Thermostat 'WI' input DI5 J7, 5-6 6 0 = 24vac, 1= 0vac
Y2 Thermostat 'Y2' input DI6 J7, 7-8 8 0 = 24vac, 1= 0vac
Y1 Thermostat 'YI' input DI7 J7, 9-10 10 0 = 24vac, 1= 0vac
CSBA1 Compressor A1 current sensor DIG1 J9, 10-12 10=5v, 11=Vin, 12=GND 0= 5vdc, 1 =Ovdc
CSBA2 Compressor A2 current sensor DIG2 J9, 7-9 7=5v, 8=Vin, 9=GND 0 = 5vdc, 1 = Ovdc
CSB B1 Compressor B1 current sensor DIG3 J9, 4-6 4=5v, 5=Vin, 6 =GND 0 = 5vdc, 1 = Ovdc
CSB B2 Compressor B2 current sensor DIG4 J9, 1-3 1=5v, 2=Vin, 3=GND 0 = 5vdc, 1 = Ovdc
Circuit A saturated 21=5v, 22=Vin, 23=GND (0-5vdc, thermistor, ohms)
DP NSCTA condensing pressure/temp AN1 J8, 21-23 (thermistor 21-22)
Circuit B saturated 24=5v, 25=Vin, 26=GND
DP B/SCTB condensing pressure/temp AN2 J8, 24-26 (thermistor 24-25) (0-5vdc, thermistor, ohms)
15=5v, 16=Vin, 17=GND
SP NSSTA Circuit A saturated AN3 J8, 15-17 (0-5vdc, thermistor, ohms)
suction pressure/temp (thermistor 15-16)
SP B/SSTB Circuit B saturated 18=5v, 19=Vin, 20=GND (0-5vdc, thermistor, ohms)
suction pressure/temp AN4 J8, 18-20 (thermistor 18-20)
RAT Return air temperature AN5 J8, 9-10 9 (thermistor, ohms)
SA TEMP Supply air temperature AN6 J8, 11-12 11 (thermistor, ohms)
OAT Outdoor air temperature AN7 J8, 13-14 13 (thermistor, ohms)
SPT Space temperature (T55/56) AN8 J8, 1-2 1 (thermistor, ohms)
SPTO Space temperature offset (T56) AN9 J8, 3-4 3 (thermistor, ohms)
IAQ/IAQMINOV IAQ analog input ANIO J8, 5-6 5 (thermistor, ohms)
FLTS Filter Status AN11 J8, 7-8 7 (thermistor, ohms)
OUTPUTS
CMPB2 Compressor B2 RLY 1 J10, 20-21 20 = RLY1A (=RLY2A), 21 = RLY1B 1 = Closes RLY1A/RLY1B
CMPB1 Compressor B1 RLY 2 J10, 22-23 22 = RLY2A (=RLY1A), 23 = RLY2B 1 = Closes RLY2A/RLY2B
CMPA2 Compressor A2 RLY 3 J10, 24-25 24 = RLY3A (=RLY4A), 25 = RLY3B 1 = Closes RLY3A/RLY3B
CMPA1 Compressor A1 RLY 4 J10, 26-27 26 = RLY4A (=RLY3A), 27 = RLY4B 1 = Closes RLY4A/RLY4B
CONDFANB Condenser fan B RLY 5 J10, 10-11 10 = RLY5A (=RLY6A), 11 = RLY5B 1 = Closes RLY5A/RLY5B
CONDFANA Condenser fan A RLY 6 J10, 12-13 12 = RLY6A (=RLY5A), 13 = RLY6B 1 = Closes RLY6A/RLY6B
HS2 Heat stage 2 RLY7 J10, 14-16 14 = 15 = RLY7A, 16 = RLY7B 1 = Closes RLY7A/RLY7B
HS1 Heat stage 1 RLY 8 J10, 17-19 17 = 18 = RLY8A, 19 = RLY8B 1 = Closes RLY8A/RLY8B
HIR Heat interlock relay RLY 9 JlO, 4-6 4 = 5 = RLY9A, 6 = RLY9B 1 = Closes RLY9A/RLY9B
SF Supply fan RLY 10 JlO, 7-9 7 = 8 = RLY10A, 9 = RLY10B 1 = Closes RLYIOA/RLY10B
ALRM Alarm output relay RLY 11 JlO, 1-3 1 = 2 = RLY11A, 3 = RLY11B 1 = Closes RLY11A/RLY11B
YAC -- Gas Heat Unit
YELLOW LED -
CCN (CARRIER COMFORT NETWORK)
Z_INSTANCE JUMPER (SET TO 1)
RED LED - STATUS GREEN LED-
__ _PMENT NETWORK) __
CEPL130346-01 HK 50A4.)29 CE BO 430346 _/
J7
Fig. 26 -- Main Base Board (MBB)
118
To Next Page
Loading...
