AUX air conditioner service manual
Experience Conclusion: the said noise is wind sound, which isn’t beyond noise standard. In such case,
do not change motor or controller without careful consideration.
Case 4: Noise produced by friction between fan blade and wind baffle
Unit Model No：ASF-H24B4/FSY
Phenomena：Noise in outdoor unit
Cause Analysis: We run the air conditioner when we finished installation, outdoor unit produced
unpleasant sound, and we suspected outdoor fan was broken or steel casing scraped with each other.
Opened the cover of outdoor unit, rotated fan with hand, no noise was heard; turned on air conditioner
again, we found that blade collided with wind baffle and produced noise. Maintenance personnel
failed to insert wind baffle in locating slot.
Solution: inserted wind baffle into locating slot, the noise was eliminated.
Experience Conclusion: if there’s noise in outdoor unit, attention should be paid to decide what kind
of noise it is: friction noise or resonance vibration noise or magnetic noise, and then deal with it
accordingly.
Case 5: Fix screws of fan blade loosed
Unit Model：ASW-12A4/M
Phenomena：Indoor unit noise
Cause Analysis: air conditioner was newly installed, and it didn’t make noise during test running.
Noise occurred one month later. Maintenance personnel suspected that there’s foreign substance in
indoor air duct or problem was caused by improper installation. We opened indoor unit but didn’t find
anything wrong. When we rotated wind wheel with hand, and found that fan blades moved to the left
and right and collided with shell because of the loose screws. We tightened the screws, air conditioner
worked properly since then.
Solution: adjusted position of wind wheel and tightened fix screws.
Experience conclusion: if noise can be heard even the air conditioner works in ventilation mode, fan
wheel should be checked first.
Case 6: Noise caused by friction in actuating mechanism of air blades
213
To Next Page
Loading...
Need help?
General
