Junkers ZWC 24-3 MFK User Manual

A8IS FLASHING
Bus communication interrupted
Control StepOrder Measure
1.
3.
4.
Yes:
Yes:
Yes:
No:
No:
No:
2. Is the room con t r o l l e r display active?
Are EMS BUS (on St19) cables connected
in parslled to toom control unit and other
connected modules?
Check if room control unit and other
modules have 15 VDC or not?
Fix cable connections make
Sure all modules and controllers have 15 VDC
Push the reset button.
Change the room controller and push reset button.
Change the modules and push the reset button.
Electronic card is out of order.
Switch off the appliance.
Cut mains supply
Change the electronic card.
Connect to mains supply.
Switch on the appliance.
Check if LED on modules is flashing
or not
If A8 still flashing
If A8 still flashing
If A8 still flashing
| 45Troubleshooting
6 720 660 238 (2008/07)
45
2.
3.
3.
4.
4.
2.

Junkers ZWC 24-3 MFK Specifications

General

Brand	Junkers
Model	ZWC 24-3 MFK
Category	Boiler
Language	English