Fisher FSAIF-Pro-95AE2 Service Manual page 43

Split wall-mounted type
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9.2.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
E4/E5/F1/F2/F3
If the sampling voltage is lower than 0.06V or higher than 4.94V,
the LED will display the failure.
Wiring mistake
Sensor faulty
PCB faulty
41

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