Acknowledging Messages - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

Troubleshooting
Control unit diagnostics

Acknowledging messages

If there are messages, these will be
shown after the system has been
started (see page 107).
Acknowledged messages remain in
the list, until the control unit has
recognised that the cause for the
message has been removed.
Messages can only be acknowl-
edged in the "Messages" display,
not in the message history.
Messages can only be acknowl-
edged together.
Required resistance curves for test-
ing sensors, see page 162.
Skip messages
To make adjustments/scans at the
control unit:
Note
If an acknowledged fault is not
removed, the message will be redis-
played the following day at 07:00 h.
Message display
All messages have a 2-digit number as identifier, the so-called "ID".
Note
The following details are required for checking sensors:
Sensor resistance curves, see from page 162.
Sensor identification and connection, see from page 172.
116
(cont.)
Access
Press "Standard display" (see
page 113): Messages appear.
"ALL" ("º" appears behind all
messages)
"BACK" to acknowledge all mes-
sages
Press "Standard display"
Access
Press "Standard display" E on
page 113: Messages appear.
"BACK": All messages will be
acknowledged simultaneously, the
fault display will be hidden, the red
fault indicator continues to flash,
return to standard menu.