Zehnder Rittling ComfoAir Q, Installer Manual

Page: 44 / 52

44 - EN
Malfunction code
TEMPCONTROL_SUP ERROR The modulating by-pass actuators have a malfunction.
Question Answer Action
1 not applicable not
applicable 1. Inspect the modulating by-pass valves as instructed in the chapter “Maintenance of the modulating
by-pass valves”.
2. Remove the modulating by-pass valves as instructed in the chapter “How to remove the modulating
by-pass valve”.
3. Go to the next question.
2 Are the
connection joints
of the valves
clean? Yes 1. Connect the power to the unit.
Risk of electrical shock.
2. Stop the service mode as instructed in the chapter “How to change the operation mode of the unit”.
3. Open the modulating by-pass fully9.
4. Set the modulating by-pass back to its original setting9.
5. Go to the next question.
No 1. Clean the connection joints.
2. Follow the procedure for ending the maintenance.
3. Reset the errors as instructed in the chapter “How to reset errors”.
3 Did the
modulating by-
pass actuators
run? Yes 1. Set the modulating by-pass to the AUTO setting9.
2. Disconnect the power from the unit.
3. Follow the procedure for ending the maintenance.
4. Reset the errors as instructed in the chapter “How to reset errors”.
No 1. Get the modulating by-pass actuator service set.
2. Replace the modulating by-pass actuator as instructed in its supplied manual.
3. Reset the errors as instructed in the chapter “How to reset errors”.
Malfunction code
TEMP_SENSOR_ETA ERROR /
TEMP_SENSOR_ODA ERROR. The extract / outdoor air sensor is detecting an incorrect temperature.
Question Answer Action
1 Is the temperature
between -40°C
and +70°C Yes 1. Solve the problem for the extreme temperature.
2. Reset the errors as instructed in the chapter “How to reset errors”.
3. Go to the next question.
No 1. Reset the errors as instructed in the chapter “How to reset errors”.
2. Go to the next question.
2 Did the error
come back? Yes 1. Inspect the heat exchanger as instructed in the chapter “Maintenance of the heat exchanger”.
2. Follow the instructions of the SENSOR_ETA ERROR / SENSOR_ODA ERROR table.
No Inspect the heat exchanger as instructed in the chapter “Maintenance of the heat exchanger”.
Malfunction code
TEMP_SENSOR_EHA ERROR /
TEMP_SENSOR_SUP ERROR. The extract / outdoor air sensor is detecting an incorrect temperature.
Question Answer Action
1 Is the temperature
between -40°C
and +70°C Yes 1. Solve the problem for the extreme temperature.
2. Reset the errors as instructed in the chapter “How to reset errors”.
3. Go to the next question.
No 1. Reset the errors as instructed in the chapter “How to reset errors”.
2. Go to the next question.
2 Did the error
come back? Yes 1. Inspect the heat exchanger as instructed in the chapter “Maintenance of the heat exchanger”.
2. Follow the instructions of the SENSOR_EHA ERROR / SENSOR_SUP ERROR table.
No Inspect the heat exchanger as instructed in the chapter “Maintenance of the heat exchanger”.
9 You can find the modulating by-pass settings in menu
> MENU > TASK MENU > BYPASS