Carrier 42D Series - Page 82

82
APPENDIX A — CONTROLS OPERATION
Fig. A — 85 Control Board
Changeover/Return Air Sensor (CN2)
Pluggable T-Stat Connector (CN1)Remote Shutdown Input (CN3)
Two-Stage
Cooling (CN5)
Actuator & Aquastat (CN6)
Transformer (CN7) Line Service Voltage (CN8)
PSC Motor Connection (CN9)
ECM Connection (CN10)
ECM Fan Speed
Adjustment
LED Indication(s)
1
2
4
3
5
6
7 8
9
10
11
13
12
1 CN1 – 24V Customer Input (Thermostat)
2 CN2 – Changeover/Return Air Sensor
3 CN3 – Remote Shutdown Input
4 CN4 – Condensate Overflow Switch
5 CN5 –Two-Stage Cooling
6 CN6 – Actuator 7 Aquastat
7 CN7 – Transformer
8 CN8 – Line Service Voltage
9 CN9 – PSC Motor Connection
10 CN10 – ECM Connection
11 ECM Fan Speed Adjustment
12 Ground Connection
13 LED Diagnostics (for Multimeter Diagnostics)