27
EN
MAINTENANCE
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 re.
Standard ltration is supplied with this unit and must be used. Dust and dirt can accumulate in the heat
exchanger if lters are removed. (This can lead to failure or decreased performance). To ensure efcient
operation, regular cleaning or replacement of lters is required. Filter maintenance frequency will depend
on working environment and unit running time.
User can use the unit after trial operation. Before contacting us, you can make self trouble shooting follo-
wing below chart in case of any failure.
Cleaning the lter
1. Open the access door
2. Remove the lters (from the side of the unit)
3. Vacuum the lters to get rid of the dust and dirt. For
bad conditions dip it into water with soft wash to clean.
4. Push the lters to the positions after they get dried
naturally, close the access door.
5. Change the lters if they are badly affected with
dust and dirt or if they are broken.
Maintenance of heat exchanger
1. Pull off the lters rst
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 lters to their positions
and close the access door.
Remarks: It is recommended maintenance of the exchanger
is made every 3 years
Warning
Failure diagnose
Phenomenon Possible reason Solutions
The airow volumes both indoor
and outdoor vents drop
obviously after a period of operation.
Dust and dirt blocking the lter Replace or clean the lter
Noise comes from vents Vents installation are loosing. Re-tightening the vents connections
Unit doesn’t work 1. No electricity
2. Protection breaker is cut
1. Guarantee power is on
2. Connect the breaker
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