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KOMFORT EC DW
4. Condensate drain system maintenance (once per year).
Extract air particles may accumulate in the condensate drain system and
cause its clogging. Fill a drain pan under the unit with water to check free
water flow. Clean the U-trap and the drain system if required.
5. Supply grille maintenance (twice per year).
Check the supply grille and remove foreign objects to maintain free air
intake.
6. Air ducts maintenance (once in 5 years).
The regular unit maintenance in compliance with the above rules may
not completely prevent dust ingress into the air ducts which may result in air
flow decrease. The air duct maintenance involves their periodical cleaning or
replacement.
7. Exhaust and intake diffuser maintenance (as required).
Remove the exhaust and the intake diffusers and flush those with warm
detergent solution. Check the ductworks connections periodically!
TROUBLESHOOTING AND FAULT HANDLING
Fault
Possible reason
Troubleshooting
The fan(s) does not
start when the unit
is on
No power supply or wrong connection to power mains.
Connect the unit to power supply. Troubleshoot the connection
error.
The motor is jammed, the impeller blades are soiled.
Remove the motor jam, clean the impeller blades.
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 the 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.
Low supply air
temperature
The extract filter is soiled.
Clean or replace the extract filter.
The heat exchanger is iced.
Check the heat exchanger condition. Shutdown the unit if
required and turn it on after the freezing danger is no longer
imminent.
Water heater malfunction.
Contact the Seller.
Noise, vibration
The impeller is soiled.
Clean the impeller.
The screw connection is loose.
Tighten the screws.
No flexible anti-vibration connectors.
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 9. Alarm list and troubleshooting
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