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iCOM
Controls Training and Service Manual
112
Temperature/ Humidity Board: All Units
This section deals with the single plug connection located on the system
temperature and humidity board. The temperature/ humidity board is supplied on
all systems with iCOM controls. The cable is plugged into Plug P67 on the unit
microprocessor board and transmits information using “CAN” – Controlled Area
Network communication. Troubleshooting is accomplished by observing an LED
located on the board. If the LED is glowing the board is good. The temperature
and humidity board is typically located in the unit return.
Humidity Temperature
Sen Sensor
Power
Supply
CAN Bus Connectors
Temperature/ Humidity Board
P67: Return Air Temperature/ Humidity Board
P67-1: CAN communication
P67-6: CAN communication
Temperature/ Humidity Assembly Housing
sor