Scanning And Resetting The "Service" Display - Viessmann VITODENS 200-W Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Scanning and resetting the "Service" display

The red fault indicator flashes when the limits set via coding address "21" and "23"
have been reached. The programming unit display flashes:
■ On a constant temperature control unit:
The defaulted hours run or the defaulted interval with clock symbol "u" (subject to
setting)
■ On a weather-compensated control unit:
"Service"
Note
Set code "24:1" and then code "24:0" if a service is carried out before the service
display is shown; the set service parameters for hours run and interval are then reset
to 0.
Press the following keys:
1. c The service scan is active.
2. a/b Scan service messages.
3. d The service display will be
cleared (for a weather-com-
pensated control unit:
"Acknowledge: Yes", recon-
firm with d).
The red fault display contin-
ues to flash.
After a service has been carried out
1. Reset code "24:1" to "24:0".
The red fault indicator extinguishes.
Note
If coding address "24" is not reset, the
"Service" message reappears:
■ On a constant temperature control
unit:
After 24 hours
■ On a weather-compensated con-
trol unit:
At 07:00 h on Monday
34
(cont.)
Note
An acknowledged service message can
be redisplayed by pressing
3 s).
2. Reset the burner hours run, burner
starts and consumption, if required.
Press the following keys:
c Scanning is active.
a/b for the selected value.
e The selected value will be set
to "0".
a/b for further scans.
d Scanning is completed.
d (approx.