Instructing The System User; Scanning And Resetting The "Service" Display - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
Maximum flow rate FX
Delivered condition: FX 3.0
Setting Description
range
FX 0.0 FX Select the flow rate in accordance with the installed collectors
20.0 (see Vitosol service instructions)
Heat transfer medium ME
Delivered condition: ME 1 (never adjust)
Setting Description
range
ME 0 Water
ME 1 Tyfocor G-LS
Manual mode MM
Delivered condition: MM 4 (automatic mode)
Setting Description
range
MM 0 Relay 1 and 2 OFF
MM 1 Relay 1 (solar circuit pump) ON, relay 2 OFF
MM 2 Relay 1 (solar circuit pump) OFF, relay 2 ON
MM 3 Relay 1 (solar circuit pump) ON, relay 2 ON
MM 4 Automatic mode

Instructing the system user

The system installer must hand the operating instructions to the system user
and instruct him/her in the operation of the system.

Scanning and resetting the "Service" display

The red fault indicator flashes when the limits set via coding address "21" and
"23" have been reached. "Service" flashes in the programming unit display:
64
3.0 l/min
(cont.)