AUX air conditioner service manual
219
Phenomena：Indoor unit leaked water
Cause analysis：air conditioner had been used for two years and never leaked water before, so it was
not caused by improper installation, it was possibly caused by obstruction in water drain pipe. When
air conditioner worked for a long time, condensate leaked from notch of basement connection tube.
We checked the appearance of air conditioner, it was installed on a level plane and filter had been
cleaned. Removed the panel, we found that evaporator was clean; filled the evaporator with water, it
didn’t leak, and could drain water smoothly. We disassembled evaporator and water flowed from
connection notch of basement. Removed indoor unit from wall, we found that rear guiding channel
had been blocked by sand, and water spilled over from channel. The main reason of block was that
wall was affected with damp and became loose, indoor unit vibrated when it operated, so sand fell into
channel.
Solution: cleaned foreign substance in channel and installed anti-moist plastic cushion to avoid sand
falling into air conditioner again.
Experience Conclusion: causes for leakage of M Series air conditioner are various, mainly including
following aspects:
⑴ Connection position of left motor bracket and water collector channel has an aperture because of
faulty injection mould, and water leaks from it;
⑵ Top of right side of water collection channel has a small aperture because of faulty injection mould
and water leaks form it;
⑶ Insulation sponge on the outlet of air blades is not appropriate affixed or insulation sponge has fall
off, so that condensate drops from the outlet.
⑷ Design of air blades is unreasonable and causes condensate dropping from it.
Solution:
⑴ In 1 and 2 cases, aperture can be filled with glass cement or ironed out with electric iron.
⑵ In third case, we shall affix insulation sponge(38×36×5mm, cutting a Φ17mm hole in the center)
properly, detailed to see Picture (1).
⑶ In the fourth case, we shall affix a 15×10×10mm PE sponge on air blades support to stuff air
blades and change zero position of stepping mode to avoid non-uniform wind of air blades.
To find out cause of leak, we shall pay attention to following aspects:
⑴ Observe air conditioner carefully before maintenance and investigate use condition, do not
disassemble air conditioner without careful consideration and cause more faults;
⑵ In case that two-folded evaporator leaks water, because it has two guiding channels, back guiding
channel is sometimes neglected by maintenance.
⑶ There are many causes for leak of air conditioner, such as structure, assembly, system,
environment and installation problems, we shall observe air conditioner carefully to find leak source,
and then deal with the problems accordingly, so that we can get twice the result with half the effort.
Case 4: Water barrier leaked water
Unit Model ASW-H09A4/ED
Phenomena：Indoor unit leaked water
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