No Programming Unit Display - Viessmann VITOCAL 300-A Installation And Service Instructions Manual
Type awc-i-m, aw-o-m
compact heat pump with electric drive, 230 v~
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Also See for VITOCAL 300-A:
- Installation and service instructions manual (208 pages) ,
- Installation and service instructions for contractors (124 pages) ,
- Operating instructions manual (60 pages)
Table of Contents
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Troubleshooting
No programming unit display
1. Switch ON system ON/OFF switch.
2. Check the fuse; replace it if
required (see page 164).
3. Check whether there is power at
the control unit and control panel;
switch ON power supply if required.
130
4. Check the plug-in and threaded
connections.
5. Replace programming unit if
required.
6. Replace PCB 2 (main PCB) if
required.
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