12.4 Abnormally high operation sound (in the ceiling type indoor unit).
Question and answer for the field work
Example 3: Abnormally high operation sound (in-the-ceiling type indoor unit)
Phenomenon The operation sound at the "HIGH" speed was abnormally high.
Cause
The indoor units were installed without the ducts. Since there scarcely was any external static pressure, an abnormally big
air volume was supplied. This resulted in a higher air speed through the heat exchanger.
Countermeasure In order to reduce the airflow rate, a plate that is used as a damper at the discharge gas side was added.
Remarks Note that the running current is increased when no external pressure is given to the indoor unit. This results in an overheating.
12 Maintenace notes
461
SMGB0060 rev. 1- 12/2010
12
To Next Page
Loading...
