aerauliqa QR350MBP, Installation Manual

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8.5 Trouble shooting

Fans do not start 
1. Check that main supply gets to the unit. 
2. Check that all connections are working (all connections in terminal box and fast couplings of intake and exhaust air fans). 
3. If only the supply fan is switched off and if the external temperature is below zero, maybe the no-frost thermostat is activated: wait until the thermostat is 
deactivated.  
   
Reduced airflow 
1. Check setting of fan speed on the CTRL-DSP (controller supplied) 
2. Check filters. Change of filters required? 
3. Check diffusers. Re-setting or cleaning of grilles and diffusers required? 
4. Check fans and heat exchange block. Cleaning required? 
5. Check if air intake and exhaust have been clogged. 
6. Check ducting system for damage and/or dirt accumulation.
 
 
Fan noise/vibrations 
1. Clean fan impellers. Cleaning required? 
2. Check that the fans are firmly in place within the unit. 
 
Excessive air noise 
1. Check setting of fan speed on the CTRL-DSP (controller supplied) 
2. Check grilles and diffusers. Re-setting or cleaning of grilles and diffusers required? 
 
Gurgling noise 
1. Drainage parts have not been installed correctly. 
2. Drain connection below the unit has a too low water level, fill it up with water. 
 
Unpleasant smell 
1. Drainage parts have not been installed correctly. 
2. Drain connection below the unit has a too low water level, fill it up with water. 
3. Check filters . Change of filters required? 
4. Check ducting system and grilles and diffusers. Cleaning required? 
 
Water leakage near the unit 
1. Drain connections and elbows/plugs have not been installed correctly. Sealing necessary? 
2. Drain connections and elbows/plugs are dirty. Cleaning necessary?

Fig. 8.r

Fig. 8.s

Fig. 8.t