Turning Direction
Install
Uninstall
Fixed Part
Service Board
Failure diagnose
User can use the unit after trial operation. Before contacting us, you can make self trouble shooting fol-
lowing below chart in case of any failure.
Phenomenon Possible reason Solutions
The airflow volumes both in-
door and outdoor vents drop
obviously after a period of op-
eration.
Dust and dirt blocking the filter Replace or clean the filter
Noise comes from vents Vents installation are loosing. Re-tightening the vents connec-
tions
Unit doesn’t work
1. No electricity
2. Protection breaker is cut
1. Guarantee power is on
2. Connect the breaker
Power must be isolated before installation and maintenance to avoid injury or electricsshock. Supply
power cables, main circuit breaker and earth leakage protection, must comply with national regulations.
Failure to observe could cause unit failure, electric shock or fire.
Standard filtration is supplied with this unit and must be used. Dust and dirt can accumulate in the heat
exchanger if filters are removed. (This can lead to failure or decreased performance). To ensure efficient
operation, regular cleaning or replacement of filters is required. Filter maintenance frequency will de-
pend on working environment and unit running time.
Cleaning the filter
1. Open the access door
2. Remove the filters (from the side of the unit)
3. Vacuum the filters to get rid of the dust and dirt. For
bad conditions dip it into water with soft wash to clean.
4. Push the filters to the positions after they get dried
naturally, close the access door.
5. Change the filters if they are badly affected with
dust and dirt or if they are broken.
Maintenance of heat exchanger
1. Pull off the filters first
2. Draw out the exchanger from the unit
3. Establish a cleaner schedule to clean the dust and
dirt on the exchanger.
4. Install the exchanger and filters to their positions
and close the access door.
Remarks: It is recommended maintenance of the ex-
changer is made every 3 years
Maintenance
21
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