Routine Maintenance - Delta 21UT024C24 Instruction Manual

7.2 Routine Maintenance

Do turn off the unit and cut off the main power supply when cleaning the air conditioner,
① .
otherwise electric shock may happen.
Do not make the air conditioner wet or electric shock may be lead; Ensure that the air
② .
conditioner will not be cleaned by water rinsing under any circumstance.
Volatile liquid like thinner or gasoline would damage the appearance of air conditioner. (So,
③ .
only soft dry cloth and wet cloth moistened by neutral cleaning fluid could be used to clean
the surface panel of air conditioner.)
(1) Cleaning the Indoor Unit
1) Remove the suction grille.
2) Slide both knobs simultaneously and then pull them downward slowly.
3) Remove the air filter from the unit (Fig.35)
4) Clean the air filter
5) Use a vacuum or water to clean the air filter when it is too dirty. If necessary, neutral
detergent can be used. After that, air dry it at a shady place.
6) Clean the suction grille by a soft brush with water and detergent, and then air dry it.
7) Reinstall the filter and suction grille as before.
(2) At the Start of the Seasonal Use
1) Check if there is blockage at the inlet or outlet vent of air conditioner.
2) Check if the earth wire has been attached reliably by the skilled serviceman.
3) Check if the exhausted batteries of the wireless controller have been replaced.
4) Check if the air filter had been installed well by professional.
Keep the power switch "On" 8 hours before the startup of the unit which has not been used for
a long period.
Note: all above should be operated by the skilled serviceman.
(3) At the End of the Seasonal Use
1) Cut off the power supply main switch
2) Clean the air filters and other parts by the skilled serviceman.
3) Leave the fan running for 2-3 hours to dry the inside of the unit.
Note: all above should be operated by the skilled serviceman.
Fig.35
Floor Ceiling Air-Conditioning Unit
WARNING !
27
Fig.36