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