Zehnder Rittling ComfoAir Q, Installer Manual

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38 - EN EN - 39
Malfunction code
OPTION_BOX CONNECT ERROR. No communication between the option box and the unit.
Question Answer Action
1 not applicable not
applicable 1. Access the ComfoNet connectors as instructed in the chapter “How to gain access to the ComfoNet
connectors on the unit”.
2. Go to the next question.
2 Are the
connections at
the ComfoNet
connector
correct?4 Yes 1. Access the option box connections.
2. Go to the next question.
No 1. Reconnect the option box to the unit.
2. Follow the procedure for ending the maintenance.
3 Are the
connections at
the option box
correct?4 Yes Go to the next question.
No 1. Reconnect the option box to the unit.
2. Fill in the maintenance log.
4 Is something
wrong with the
option box cable? Yes 1. Replace the cable.
2. Follow the procedure for ending the maintenance.
No 1. Get a new option box.
2. Replace the option box.
3. Wait for 2 minutes.
4. Go to the next question.
5 Is the error still
present? Yes 1. Get the control PCB service set.
2. Replace the control PCB as instructed in its supplied manual.
3. Follow the procedure for ending the maintenance.
No Follow the procedure for ending the maintenance.
Malfunction code
GROUND_HEAT_CONNECT ERROR
/ POSTHEAT_ CONNECT ERROR. There is no communication between the ComfoFond-L Q / post-heater and the unit.
Question Answer Action
1 not applicable not
applicable 1. Access the option box connectors.
2. Go to the next question.
2 Are the
connections at
the option box
correct?4 Yes 1. Access the connections on the ancillary side.
2. Go to the next question.
No 1. Reconnect the ancillary to the option box.
2. Fill in the maintenance log.
3 Are the
connections at
the ancillary side
correct?7 Yes Go to the next question.
No 1. Reconnect the ancillary to the option box.
2. Follow the procedure for ending the maintenance.
4 Is something
wrong with the
cable? Yes 1. Replace the cable.
2. Follow the procedure for ending the maintenance.
No 1. Get a new ancillary.
2. Replace the ancillary.
3. Go to the next question.
5 Is the error still
present? Yes 1. Get the control PCB service set.
2. Replace the control PCB as instructed in its supplied manual.
3. Follow the procedure for ending the maintenance.
No Follow the procedure for ending the maintenance.
4 You can find the correct connection in the technical specification chapter.
7 You can find the correct connection in the manual of the ancillary.