Appendix
22
Installation and maintenance instructions recoVAIR 0020159949_07
Symptom
Possible cause
Measure
Product with increased noise
level
System components (e.g. heat
exchanger, fan) are dirty
▶
Clean dirty system components.
Fan runs at maximum rotational
speed
1.
Check whether the pressure hoses are bent.
2.
Reduce the air volume flow at the lowest ventilator speed.
No or insufficient exhaust air or
supply air
Filter dirty
▶
Clean the filters.
Exhaust-air line blocked
▶
Clean the exhaust-air line.
Supply-air line blocked
▶
Clean the supply-air line.
Fan defective
▶
Replace the fan(s).
Air flow too low
▶
Install an intake grille that has increased air flow.
Supply-air valve is closed too
far
1.
Open the supply-air valve.
2.
Adjust the system.
Exhaust-air valve is closed too
far
1.
Open the exhaust-air valve.
2.
Adjust the system.
Supply-air temperature too low
▶
Wait until the supply-air temperature increases again. The
product then starts normal operation.
Supply air temp.: > 10
℃
Outside temperature too low
1.
Check whether
S.812
is displayed in the
Live Monitor
.
2.
Wait until the outside temperature increases again. The
product then starts normal operation.
–
Outside temperature: >
−
3
℃
Bypass summer mode does not
work
Bypass function not active
1.
Activate the bypass function.
2.
Set the planned operating days for summer mode.
The bypass motor is connected
incorrectly
1.
Check the plug connection to the bypass motor.
2.
Check the temperature sensor.
Bypass motor is defective
▶
Replace the bypass motor.
Incorrect flap position
▶
Check the flap position.
The temperature sensor is posi-
tioned incorrectly
▶
Check the positioning of the temperature sensor.
Noises in the condensate drain
pipework
Condensate siphon connected
incorrectly
▶
Connect the condensate siphon correctly.
Water drips out of the product
Exhaust-air lines not insulated
to ensure that they are vapour-
diffusion-tight
▶
Insulate the exhaust-air lines so that they are vapour-diffusion-
tight.
Supply-air lines not insulated
to ensure that they are vapour-
diffusion-tight
▶
Insulate the supply-air lines so that they are vapour-diffusion-
tight.
The supply air is too cold
Supply-air and exhaust-air flows
are not balanced
▶
Adjust the product.
Incorrect flap position
▶
Check the flap position.
Bypass motor is defective
▶
Replace the bypass motor.
System components (e.g. heat
exchanger, fan) are dirty
▶
Clean dirty system components.
Frost protection active (mains
voltage present)
1.
Check whether
S.815
is displayed in the
Live Monitor
.
2.
Wait until the outside temperature increases (the product
automatically switches on no later than 60 minutes after the
temperature increases.).
–
Outside temperature: >
−
3
℃
Bad and/or unpleasant odours
present
Openings for the supply-air and
exhaust-air lines are too close
to each other
▶
Increase the distances between the openings for the supply-air
and exhaust-air lines.
Noise transmission between the
rooms
No T supersonic damper in-
stalled
1.
Install T supersonic dampers.
2.
Adjust the product.
Planned air volume flow not
available after installation
Installation is not vapour-diffu-
sion-tight
▶
Check that all of the connections are leak-tight.
Noises after replacing the fan
Fan installed incorrectly
▶
Check the fan's installation location.
