Phenomena of problems other than error mode display
Phenomenon | Cause |
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Lighting does not turn on. | 1.Lighting board | • Replace the light receiving board. |
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| 2.Control circuit | • Replace the control board if other than above. |
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The hand dryer starts | 1.Stained sensor's windows | • Are the sensor's three windows stained? |
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drying as soon as the | 2.Disengaged sensor | • Is the sensor's lead wire connector connected? |
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power switch is turned | 3.Displaced sensor's | • Are the sensor's board positions displaced (bottom | ||||||||||
ON. | board positions |
| light emitting boards, light receiving board)? |
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| 4.Sensor light | • Measure the forward voltages of the LEDs on the | ||||||||||
| emitting/receiving |
| bottom light emitting boards and the photo diode | |||||||||
| diode failure |
| (PHD) on the light receiving board with a measuring | |||||||||
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| device that has a diode check function. |
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| – side |
| Item name |
| Measured value |
| Decision |
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| Tester | LED |
| 0.9 to 1.2V |
| Normal |
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| + side |
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| Photo diode |
| 0.5 to 0.8V |
| Normal |
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| * Replace the bottom light emitting boards and the light | ||||||||||
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| receiving board if the measured values are other than | |||||||||
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| the normal values shown in the table above. |
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| 5.Control circuit | • Replace the display board or the control circuit if other | ||||||||||
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| than above. |
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The hand dryer does not | 1.Stained sensor's | • Are the sensor's three windows stained? → Clean the | ||||||||||
stop after removing the | windows |
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hands. | 2.Disengaged sensor | • Is the sensor's lead wire connector connected? |
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| 3.Displaced sensor's | • Are the sensor's board positions displaced? → Install | ||||||||||
| board positions |
| the sensor light boards in their proper positions if | |||||||||
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| displaced (top light emitting boards, light receiving | |||||||||
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| board). |
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| 4.Sensor light | • Measure the forward voltages of the LEDs on the top | ||||||||||
| emitting/receiving |
| light emitting boards and the photo diode (PHD) on | |||||||||
| diode failure |
| the light receiving board with a measuring device that | |||||||||
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| has a diode check function. |
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| – side |
| Item name |
| Measured value |
| Decision |
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| Tester | LED |
| 0.9 to 1.2V |
| Normal |
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| + side |
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| Photo diode |
| 0.5 to 0.8V |
| Normal |
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| * Replace the top light emitting boards and the light | |||||||||
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| receiving board if the measured values are other | |||||||||
| 5.Control circuit |
| than the normal values shown in the table above. | |||||||||
| • Replace the display board or the control circuit if other | |||||||||||
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| than above. |
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Abnormal noise is | 1.Suction of foreign | • Are foreign particles being attached to the motor's | ||||||||||
particles | ||||||||||||
generated. |
| fins? |
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2.Filter clogged with dust |
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| • Is the filter clogged with dust? |
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