Zehnder Group ComfoAir 160, Installer Manual

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EN - 26
2.10.4 Malfunctions (or problems) without alerts
An overview of the malfunctions (or problems) without notifications is given below.
Problem/Malfunction Indication Check / action
System switched off Power supply on
Check the fuse on the control circuit
board.
• If the fuse is defective, replace fuse.
• If the fuse is oK, the control circuit
board is defective and must be
replaced.
No power supply
Mains power is off.
High intake tempera-
ture in summer Bypass remains closed
reduce the comfort temperature.
ComfoAir is still in Winter mode:
Bypass remains closed Checking the Mode of the ComfoAir is
possible with special read-out software.
• Wait untill ComfoAir switches to
Summer mode.
Low intake tempera-
ture in winter Bypass stays open
Wait a half an hour, the bypass will al-
ways stay open for at least half an hour.
After half an hour, increase the comfort
temperature.
Little or no
air supply;
shower remains
damp Filters blocked
replace the filters.
Valves blocked
Clean the valves.
Exchanger clogged by dirt.
Clean the exchanger.
Exchanger frozen
defrost the exchanger.
Fan dirty
Clean the fan.
Ventilation ducts blocked
Clean the ventilation ducts.
ComfoAir is in frost-protection
operation Wait until the weather warms up.
Too noisy Fan bearings defective
replace the fan (bearings).
Fan settings to high
Change the fan (settings).
Slurping noise
• Siphon is empty
• Siphon does not seal properly
reconnect the siphon.
Whistling noise
• An air gap somewhere
Seal the air gap.
Airflow noise
• Valves do not close onto duct.
• Valves not open far enough
reinstall the valves.
reset the valves.
Condensation leak Condensation drain clogged
unblock the condensation drain.
Condensation from exhaust duct does
not run into leakage tray
Check whether the connections
are correct.
Corded 3-position
switch not working Cabling is not 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].
Switch is defective
Wireless 3-position
switch not working Battery is discharged
Check the battery.
• replace the battery (if necessary).
Switch is not correctly tuned. Remove the power briefly from the
ComfoAir. Shortly after reconnecting
the power, tune the switch again.