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17.4.15 H70 (Light Sensor Abnormality)
Malfunction Decision Conditions
Feedback signal of light sensor.
Malfunction Caused
Feedback value is 0 VDC continuously.
Troubleshooting
Is the connector connection normal?
When abnormality indication starts again.
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
NO
YES
YES
Check if the feedback signal of sunlight sensor (pin 11 and 12)
is normal.
Depends on indoor light intensity, feedback voltage
= 0.06 ~ 4.8 VDC (from dim to bright).
Check the connector connection:
Turn off the power.
Check the connector connection.
Connector poor contact.
Correct the connection.
Defect in indoor unit PCB.
Replace the indoor unit PCB.
NO
Defect in sunlight sensor.
Replace the sinlight sensor.
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