Troubleshooting; Fault Messages; Scanning Temperatures And Programs - Viessmann Vitotrol 100 OT Installation And Service Instructions Manual

Fault messages

If a fault occurs, the display shows
"ERROR".
Press INFO to show the fault message.
Fault message
"ERROR OUTSIDE TEMPER-
ATURE"
"ERROR - FLAME"
"ERROR - WATER TEMP"
Note
Fault messages which are displayed as
a fault code can be found in the instal-
lation and service instructions for the
heat generator.

Scanning temperatures and programs

Press INFO to select the required scan.
Depending on the system configuration,
not all scans are displayed.
Scan
"ROOM TEMP"
"OUTSIDE TEMP"
"P... ACTIVE"
"TARGET TEMP"
"FEED SETPOINT TEMP"
"FEED SETPOINT TEMP 2"
"ACTUAL FEED TEMP"
"ACTUAL FEED TEMP 2"
"HW SETPOINT TEMP"
"ACTUAL HW TEMP"
Meaning
Short circuit/lead break, outside temperature sen-
sor
No flame signal
Temperature limiter has responded
For messages "ERROR D0" to
"ERROR D5", see the installation and
service instructions for the mixer exten-
sion kit.
Meaning
Current room temperature
Current outside temperature
Active program
Set room temperature (for room temperature-de-
pendent mode)
Set flow temperature for heating circuit (if 1 heating
circuit is connected) or heating circuit without mixer
(if 2 heating circuits are connected)
Set flow temperature for heating circuit with mixer
(if 2 heating circuits are connected)
Actual flow temperature for heating circuit (if 1
heating circuit is connected) or heating circuit with-
out mixer (if 2 heating circuits are connected)
Actual flow temperature for heating circuit with mix-
er (if 2 heating circuits are connected)
Set DHW temperature
Actual DHW temperature

Troubleshooting

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