Carrier ZS Standard - Troubleshooting SPT Sensors

SPT Sensors
Carrier Sensors CARRIER CORPORATION ©2021
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23
Troubleshooting SPT Sensors
Use the following tables to troubleshoot an SPT sensor.
SPT Standard or SPT Plus
If LED on back of circuit board...
Then sensor...
Is not lit
Has no power
Blinks 1 time per second
Has power, but is not communicating
Blinks 2.5 times per second
Is correctly wired and communicating
SPT Pro or SPT Pro Plus
If display shows...
Then sensor...
Nothing
Has no power
All display elements
Has power, but is not communicating
Only the temperature and current status
Is correctly wired and communicating
NOTE If OF is displayed, cycle the power on the controller.
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