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No.
Components
4 Main circuit board [2] Check the motor drive.
5 Remote controller
(VL-50SR
-E only)
2
10. Before receiving repair requests
Frequently asked question
The incoming air feels cold.
When switching the operating
mode or adjusting the shutter knob,
there is a noise inside the product.
The product does not operate.
The operation sound becomes
louder.
The air volume is low.
No air is coming from the product.
Not much air is coming from the
product.
The front panel cannot be closed. If Lossnay core and filters are not properly installed, reinstall them prop-
When adjusting the shutter knob,
there is a noise inside the product.
Cold air or wind comes in more
than usual when the product is
stopped.
Operation sensitivity of the re-
mote controller is low.
(VL-50SR
-E only)
2
• Motor: Measure the voltage between the pins of the following connector.
VL-50S
-E, VL-50ES
2
VL-50SR
-E: CN2
2
At high fan speed output: Between 1 and 5 pins: 220/230/240 V AC ± 5 V
At low fan speed output: Between 1 and 5 pins: 80 V AC or more
For details of the above checkpoints, see Chapter 7. Circuit board diagrams.
If any of the above items is not satisfied, replace the main circuit board together with
the display circuit board.
• Check if the battery is old. (Battery voltage 2.9 V or more is required.)
• If the remote controller does not work, even though the operating mode selection
switch is operable, the remote controller might be broken.
( Take a digital photo of the transmitter part on the remote controller to check
whether infrared rays are emitted from the remote controller.)
Has the outside air temperature dropped?
If the outside air temperature has dropped, switch the operating mode to
"Exhaust only mode," or stop the operation and close the shutters.
This sound is the operation sound of the motor or shutters in the product.
It is not a malfunction.
[1] The power plug is almost detached from the wall outlet. (VL-50S
[2] The circuit breaker on the distribution board is OFF.
[3] A power failure has occurred.
[1] If the front panel or the filters are almost detached (or tilted), reinstall
them properly.
[2] If the shutters are closed, adjust the shutter knob to the OPEN position.
[3] If the filters are clogged, clean them in accordance with the operating
instructions.
If the filters are clogged, clean them in accordance with the operating
instructions.
If the shutters are closed, adjust the shutter knob to the OPEN position.
erly. (For example, a component is out of position or inserted backwards.)
This sound is the operation sound of the shutters in the product. It is not a
malfunction.
If the shutters are being kept open, adjust the shutter knob to the CLOSE
position.
[1] Check if the battery is weak. (Replace it with a commercially available
lithium battery (CR2025).)
[2] Check if the remote controller is operated at the position too far away
from the product, or at the improper angle. (See page 14.)
[3] Operation sensitivity of the infrared remote controller can be affected by
strong light such as sunlight or room illumination. It is not a malfunction.
[4] Electromagnetic waves can affect the operation sensitivity at the loca-
tions in close proximity of electronic devices such as a television. It is
not a malfunction.
Judging instructions
-E: CN3
2
Response
─ 17 ─
-E only)
2
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