Panasonic CS-S9MKQ Service Manual page 101

15.4.13 H58 (Patrol Sensor Abnormality)
Malfunction Decision Conditions
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If Patrol sensor feedback is 0V or 5V continuous for 6 hours.
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Error will display only when the Patrol operation is ON.
Malfunction Caused
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Faulty connector connection.
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Faulty Patrol sensor.
Troubleshooting
101