www.blaubergventilatoren.de
9
FRESHBOX 60
Servicing of the unit is required 3-4 times per year.
Disconnect the unit from power mains prior to any maintenance operations.
The unit maintenance includes regular cleaning of the unit surfaces and
components from dust and filter cleaning or replacement.
To remove dust in the air handling unit use a soft brush, a cloth or compressed
air. Do not use water, abrasive detergents, sharp objects and solvents. Clean the
impeller blades once a year.
Soiled filters increase air resistance and decrease the unit performance. The
filters can be cleaned with a vacuum cleaner or with running water. Let the
filters dry well at least for 24 hours. The filters require cleaning at least 3-4 times
per year.
For accessing the unit filters open the front panel, fig. 1.
Regular cleaning is required to maintain the high heat recovery efficiency of the
heat exchanger. To clean the heat exchanger use a vacuum cleaner or flush it
under running water. And at least 24h to dry well.
MAINTENANCE
Fig. 13. SGR-3/1 sensor speed switch mounting
Mounting sequence of the sensor speed switch, fig. 13:
1. Carefully undo the latches of the switch front panel with a screwdriver.
2. Remove the front panel.
3. Route the cable to the installation place of the speed switch.
4. Fix the back panel to the wall through the fixing holes.
5. Connect the control cable to the speed switch following the wiring
diagram, fig. 12.
6. Install the speed switch front panel on the latches.
TROUBLESHOOTING
Fault
Possible reasons
Remedy
The fan does not start when the unit
is on.
No power supply.
Make sure of correct power supply, otherwise troubleshoot the connection
error.
Cold supply air.
Extract filter is clogged.
Clean or replace the extract filter.
The heat exchanger is frosted.
Check the heat exchanger for frosting. Shut the unit off if required and let
ice melt.
Low air flow.
The filters, the fans or the heat exchanger are
soiled.
Clean or replace the filters; clean the fans and the heat exchanger.
The air ducts or the outer hood are soiled or
mechanically damaged.
Clean or replace the damaged air ducts or the outer hood.
Noise, vibration.
The impeller blades are clogged.
Clean the impeller blades.
Loose screw connection.
Tighten the fastening screws.
Table 2. Error list and troubleshooting