Malfunctions (Or Problems) Without Alarms - Zehnder ComfoAir 550 Installationsanleitung

2.10.4 Malfunctions (or problems) without alerts
An overview of the malfunctions (or problems) without notifi cations is given below.
Problem/Malfunction Indication
System switched off Power supply on
High intake temper-
ature in summer
Low intake tempera-
ture in winter
Little or no
air supply;
shower remains
damp
Too noisy
Condensation leak
Corded 3-position
switch not working
Wireless 3-position
switch not working
No power supply
Bypass remains closed
ComfoAir is still in Winter mode:
Bypass remains closed
Bypass stays open
Filters blocked
Valves blocked
Exchanger clogged by dirt.
Exchanger frozen
Fan dirty
Ventilation ducts blocked
ComfoAir is in frost-protection
operation
Fan bearings defective
Fan settings to high
Slurping noise
• Siphon is empty
• Siphon does not seal properly
Whistling noise
• An air gap somewhere
Airfl ow noise
• Valves do not close onto duct.
• Valves not open far enough
Condensation drain clogged
Condensation from exhaust duct
does not run into leakage tray
Cabling is not correct
Switch is defective
Battery is discharged
Switch is not correctly tuned.
Check / action
Check the fuse on the control circuit
board.
• If the fuse is Defect, replace fuse.
• If the fuse is OK, the control circuit
board is defective and must be
replaced.
Mains power is off.
Reduce the comfort temperature.
Cheking the Mode of the ComfoAir is
possible with special read-out software.
• Wait untill ComfoAir switches to
Summer mode.
Increase the comfort temperature.
Replace the fi lters.
Clean the valves.
Clean the exchanger.
Defrost the exchanger.
Clean the fan.
Clean the ventilation ducts.
Wait until the weather warms up.
Replace the fan (bearings).
Change the fan (settings).
Reconnect the siphon.
Seal the air gap.
Reinstall the valves.
Reset the valves.
Unblock the condensation drain.
Check whether the connections
are correct.
Check the wire-circuit of the
3-position switch by
measuring the voltage:
• Voltage only on N & L3:
[Fans rotate in position 1].
• Voltage only on N & L3 & L2:
[Fans rotate in position 2].
• Voltage only on N & L3 & L1 or
N & L3 & L2 & L1:
[Fans rotate in position 3].
Check the battery.
• Replace the battery (if necessary).
Remove the power shortly from the
ComfoAir. Shortly after reconnecting
the power tune the switch again.
25 - EN