Panasonic S-80MW1E5 Service Manual & Test Run Service Manual page 23

16. Troubleshooting Guide
Alarm code F03
Alarm meaning Abnormal refrigerant sensor 2 (E3)
Alarm conditions A/D step is 10 steps or less (short circuit).
A/D step is 1014 steps or more (open circuit).
Possible Cause Faulty connector connection
Faulty sensor
Faulty indoor unit PCB
Check Measure the sensor resistance. Check that the sensor is operating normally.
Use a remote controller monitor or PC monitor to check the temperature that is
recognized by the microcomputer.
Alarm code F10
Alarm meaning Abnormal water inlet sensor (TA)
Alarm conditions A/D step is 10 steps or less (short circuit).
A/D step is 1014 steps or more (open circuit).
Possible Cause Faulty connector connection
Faulty sensor
Faulty indoor unit PCB
Check Measure the sensor resistance. Check that the sensor is operating normally.
Use a remote controller monitor or PC monitor to check the temperature that is
recognized by the microcomputer.
Alarm code F11
Alarm meaning Abnormal water outlet sensor 2 (BL)
Alarm conditions A/D step is 10 steps or less (short circuit).
A/D step is 1014 steps or more (open circuit).
Possible Cause Faulty connector connection
Faulty sensor
Faulty indoor unit PCB
Check Measure the sensor resistance. Check that the sensor is operating normally.
Use a remote controller monitor or PC monitor to check the temperature that is
recognized by the microcomputer.
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Air-to-Water Indoor Unit
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