Appendix - Carrier 24AHA4 Service Manual

DESCRIPTION
Control Board Input/Output Values
Temperature Sensor Values (Temperature vs. Resistance) for T1, T2, T3, T4
Temperature Sensor Values (Temperature vs. Resistance) for T5
Indoor Unit Diagnostic Codes
A1
Table 17 – Control Board Input/Output Value - - 40MFC(Q)009---1 / 40MFC(Q)012---1
CONNECTOR
CAP
CN 6
CN 7
CN_COMP
CN_VALVE
CN_L4
CN_N1
CN_N2
CN_T0
CN_TIN
CN 3
CN 2
CN 5
CN 10/11
CN_SWM

APPENDIX

APPENDIX TABLE OF CONTENTS
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Table 16 – Control Board Input/Output Value
CONTROL BOARD INPUT or OUTPUT VALUE
Transformer secondary interface Output AC 12V
Transformer primary interface Input AC 230V
Pipe temperature interface Output DC 5V
Room temperature interface Output DC 5V
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Capacitor Voltage :AC 230V
Fan drive interface Voltage :AC 230V
Fan feedback interface Output DC 12V
Compressor signal Voltage :AC 230V
Four way valve signal Voltage :AC 230V
Live wire L Voltage :AC 230V
Null line N Voltage :AC 230V
Null line N Voltage :AC 230V
Display board interface Output DC 5V
Motor Interface Output DC 12V
Emergency key interface DC 5V
24
NUMBER
A1
A2
A3
A4