Zehnder Rittling ComfoAir 1500, Manual

Page: 40 / 48

40 - EN
Error
code Description code Cause Result /
Action
E21 Port 1 no
communication Com port 1 failure No communication with connected equipment
Check settings in parameter M08, connections and connected
devices
E22 Port 2 no
communication Com port 2 failure
E23 Port 3 no
communication Com port 3 failure
E24 Port 4 no
communication Com port 4 failure
E25 Port 5 no
communication Com port 5 failure
E26 FIRE FIRE The assigned input contact “Fire Alert”
(FIRE) is activated
�
The supply and extract fans run at the values programmed
in parameters M02-19 and M02-20 or in parameters M02-21
and M02-22;
�
The bypass opens;
�
The cooling and heating closes.
E3110 Failure supply fan Supply fan malfunctioning. Check fan, cabling, both PCBs.
E3210 Failure exhaust fan Extract fan malfunctioning. Check fan, cabling, both PCBs.
E33 n/a Parameter M12-01 programmed
incorrectly. Set M12-01 to 0.
E34 Failure overall The assigned input contact “General
failure” is activated.
�
The supply or extract fans switch off;
�
The bypass closes.;
�
The cooling and heating valves close.
E35 n/a Parameter M12-01 programmed
incorrectly. Set M12-01 to 0
E36 Failure supply air
pressure nozzle Supply fan pressure nozzle not
registering pressure difference. Corresponding fan still running at 50%
Check air volumes, pressure hose, pressure nozzle.
E37 Failure exhaust air
pressure nozzle Extract fan pressure nozzle not
registering pressure difference.
E3811 Failure cooling Cooling battery failure. No Delta T across the battery.
Check the corresponding battery.
E3911 Failure heating Heating battery failure.
E41 Frost contact closed Frost risk! The assigned digital/
temperature input contact “Frost
protection” is activated.
�
Summer night cooling stops;
�
The supply fan is switched off;
�
The heating valve is set at a minimum of 50%;
�
The cooling/heating pump is switched on.
E4211,12 PreHeat frost extract
max power Output preheater extract is more than
95% for at least 5 minutes. No actions necessary
E4311,12 Frost recuperating
unit Heat exchanger frost protection has
become active. (T4 < M12-02). The supply fan is powered down or switched off in accordance
with M12-02 and M12-03 settings.
This message will automatically disappear if the measured
value T4 exceeds M12-02 settings again.
E4411 Filter Exhaust Excessive pressure drop across extract
filter for at least 24 hours. Replace extract filter.
E4511 Filter Supply Excessive pressure drop across supply
filter for at least 24 hours. Replace supply filter.
E46 Min supply temp
alarm Required supply temperature too low. (T2
≤ M10-29). Supply fan is deactivated and only reactivated 30 minutes after
T2 measures a higher value than M10-29.
E4711,12 Max Filter Exhaust Pressure across exhaust air filter is higher
than set in M70-13. The exhaust fan is powered down.
This message will automatically disappear if the pressure
across the exhaust air filter is lower than set in M70-13.
E4811,12 Max Filter Supply Pressure across supply air filter is higher
than set in M70-13. The supply fan is powered down.
This message will automatically disappear if the pressure
across the supply air filter is lower than set in M70-13.
10 This failure code can be activated by a digital input or the communication line of the fan itself
11 The Alarm relay stays deactivated. The ComfoAir XL active relay stays active.
12 This failure code does not need to be reset.