30 - EN
EN - 31
Error code
PRESSURE 12 ERROR / PRESSURE 22 ERROR
Malfunction in the pressure sensor for the exhaust air / supply air.
■
For the right-hand unit: PRESSURE SENSOR 22 is to the right;
■
For the left-hand unit: PRESSURE SENSOR 22 is to the centre-left;
Question
Answer
Action
1
n/a
n/a
1. Remove the electronics cap as described in the section “Access to the control PCB”.
2. Go to the next question.
2
Are all connectors properly
connected to the control
PCB?
(See connection diagram
in the section “Technical
specifications”)
Yes
1. Check the connector of the sensor. How to get access to the sensor can be found in the section
“Access to the T12/T21/T22 sensor”.
2. Go to the next question.
No
1. Connect everything as described in the connection diagram in the section “Technical
specifications”.
2. Follow the procedure for completing the maintenance.
3
Is the connector properly
connected to the sensor?
Yes
1. Get the service set for the sensor of the central section.
2. Replace the sensor as described in the manual supplied.
3. Go to the next question.
No
1. Connect the connector properly.
2. Follow the procedure for completing the maintenance.
4
Did the error alert return?
Yes
1. Get the service set for the control PCB.
2. Replace the control PCB as described in the manual supplied.
3. Follow the procedure for completing the maintenance.
Error code
RH SENSOR 11 ERROR /
RH SENSOR 20 ERROR
Malfunctions in the humidity sensor for the extract air / outdoor air.
■
For the right-hand unit: RH SENSOR 11 is to the top-right of the unit;
■
For the left-hand unit: RH SENSOR 11 is to the top-left of the unit.
Question
Answer
Action
1
n/a
n/a
1. Remove the electronics cap as described in the section “Access to the control PCB”.
2. Go to the next question.
2
Are all connectors properly
connected to the control
PCB?
(See connection diagram
in the section “Technical
specifications”)
Yes
1. Check the connector of the sensor. How to get access to the sensor can be found in the
malfunction Section “Access to the T11/T20 sensor”.
2. Go to the next question.
No
1. Connect everything as described in the connection diagram in the section “Technical
specifications”.
2. Follow the procedure for completing the maintenance.
3
Is the connector properly
connected to the sensor?
Yes
1. Get the service set for the sensor of the upper section.
2. Replace the sensor as described in the manual supplied.
3. Go to the next question.
No
1. Connect the connector properly.
2. Follow the procedure for completing the maintenance.
4
Did the error alert return?
Yes
1. Get the service set for the control PCB.
2. Replace the control PCB as described in the manual supplied.
3. Follow the procedure for completing the maintenance.
Error code
RH SENSOR 12 ERROR /
RH SENSOR 22 ERROR /
Malfunctions in the humidity sensor for the exhaust air / outdoor air.
■
For the right-hand unit: RH SENSOR 22 is to the centre-right of the unit;
■
For the left-hand unit: RH SENSOR 22 is to the centre-left of the unit.
Question
Answer
Action
1
n/a
n/a
Remove the electronics cap as described in the section “Access to the control PCB”.
2
Are all connectors properly
connected to the control
PCB?
(See connection diagram
in the section “Technical
specifications”)
Yes
1. Check the connector of the sensor. How to get access to the sensor can be found in the section
“Access to the T12/T21/T22 sensor”.
2. Go to the next question.
No
1. Connect everything as described in the connection diagram in the section “Technical
specifications”.
2. Follow the procedure for completing the maintenance.
3
Is the connector properly
connected to the sensor?
Yes
1. Get the service set for the sensor of the central section.
2. Replace the sensor as described in the manual supplied.
3. Go to the next question.
No
1. Connect the connector properly.
2. Follow the procedure for completing the maintenance.
4
Did the error alert return?
Yes
1. Get the service set for the control PCB.
2. Replace the control PCB as described in the manual supplied.
3. Follow the procedure for completing the maintenance.
10001047667-0619-zw-zw-A4 ComfoAir E 350 GEN2 Service Zehnder-SI_EN.indd 31
11-07-19 13:31
