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www.blaubergventilatoren.de
KOMFORT EC LW
TECHNICAL MAINTENANCE
Regular technical supervision and maintenance of the unit are required to
ensure the product long service life and non-stop operation.
Disconnect the unit from power supply prior to any maintenance
operations.
WARNING! Consider the unit sharp edges! Fulfil maintenance
operations in work gloves!
1. Filter maintenance (3-4 times per year).
Dirty filters increase air resistance and decrease supply air volume.
Clean the filters with a vacuum cleaner or flush those with water. After two
consecutive cleanings the filters must be replaced. Install dry filters only!
Contact the Seller to purchase the filters stated above in the «Technical data»
section.
Dirty filters are not considered as a warranty case!
Replace humid and mouldy filters immediately!
2. Heat exchanger maintenance (once a year).
The heat exchanger must be regularly cleaned to maintain high heat
recovery efficiency even in case of the regular filter cleaning. To clean
the heat exchanger pull it out, flush the heat exchanger with warm
detergent solution. After cleaning install the dry heat exchanger back
to the unit.
3. Fan maintenance (once a year).
The regular filter cleaning may not completely prevent the dust ingress
into the unit, which results in the unit capacity decrease. Clean the fan with a
soft cloth or a brush. Cleaning with water, abrasive detergents, sharp object or
chemicals is not allowed.
4. Condensate drain system maintenance (once per year).
The condensate drainage (drain line) may get clogged by dirt and dust
particles contained in the exhaust air. Check the drain line operation by filling
the drain pan under the unit with water, clean the U-trap and the drain line,
if necessary.
5. Technical maintenance of the supply grille (twice a year).
Check the supply grille and remove foreign objects to maintain free air
intake.
6. Air ducts maintenance (once in 5 years).
Even regular fulfilling of all the prescribed above maintenance operations
may not completely prevent dirt accumulation in the air ducts which reduces
the unit capacity. Duct maintenance means regular cleaning or replacement.
7. Exhaust and intake diffusers maintenance (if required).
Remove the exhaust and the intake diffusers and flush those with warm
detergent solution. Check the ductworks connections periodically!
WARNING
Cut power supply to the unit off by turning the automatic electric switch QF to OFF position prior to
any maintenance operations.
Take steps to prevent activation of the automatic switch before finishing all the operations.
QF
TROUBLESHOOTING
Fault
Possible reason
Troubleshooting
The fan(s) does not
start when the unit
is on
No power supply or connection error.
Connect the unit to power supply. Troubleshoot the connection
error.
Jammed motor, soiled impeller blades.
Remove the motor jam, clean the impeller blades.
Alarm in the system.
Remove the system alarm. Restart the unit.
Automatic switch
tripping
Short circuit in power grid.
Turn the unit off and contact the unit Seller for fault diagnostics.
Low air flow
Too low set speed.
Set higher speed.
The filters and the fans are soiled, the heat exchanger is soiled.
Clean or replace the filters, fans and the heat exchanger.
The air dampers, the supply diffusers or the exhaust grilles are
closed or soiled.
Open and clean the air dampers, the supply diffusers, the
exhaust grilles to ensure free air flow.
Cold supply air
The extract filter is soiled.
Clean or replace the extract filter.
The heat exchanger is frozen.
Check the heat exchanger condition. Turn the unit off if
required and restart it after the freezing danger is no longer
imminent.
Malfunction of the water heater.
Contact the Seller.
Noise, vibration
The impeller is soiled.
Clean the impeller.
The screw connection is loose.
Tighten the fastening screws.
No flexible anti-vibration connectors are installed.
Install the flexible anti-vibration connectors.
Condensate leakage
The drain system is clogged, damaged or wrong installed.
Clean the condensate drain system. Check the drain hose slope.
Make sure the U-trap is filled with water and the drain system is
frost-protected.
Table 11. Possible faults and troubleshooting
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