63
Fault code
on the dis-
play
System characteris-
tics
Cause
Measures
0F
Control mode
Maintenance
Service the equipment.
After the service, set cod-
ing address "24:0".
10
Controls as if the out-
side temperature
were 0 °C
Short circuit, out-
side temperature
sensor
Check the outside tem-
perature sensor (see
page 69).
18
Controls as if the out-
side temperature
were 0 °C
Lead break, out-
side temperature
sensor
Check the outside tem-
perature sensor (see
page 69).
20
Regulates without
flow temperature
sensor (low loss
header)
Short circuit, sys-
tem flow tempera-
ture sensor
Check the low loss header
sensor (see page 71).
28
Regulates without
flow temperature
sensor (low loss
header)
Lead break, sys-
tem flow tempera-
ture sensor
Check the low loss header
sensor (see page 71).
30
Burner blocked
Short circuit, boiler
water temperature
sensor
Check the boiler water
temperature sensor (see
page 71).
38
Burner blocked
Lead break, boiler
water temperature
sensor
Check the boiler water
temperature sensor (see
page 71).
40
Mixer closes
Short circuit, flow
temperature sen-
sor in heating cir-
cuit with mixer M2
Check the flow tempera-
ture sensor.
48
Mixer closes
Lead break, flow
temperature sen-
sor in heating cir-
cuit with mixer M2
Check the flow tempera-
ture sensor.
50
No DHW heating
Short circuit, cylin-
der temperature
sensor
Check the sensor (see
page 71).
58
No DHW heating
Lead break, cylin-
der temperature
sensor
Check the sensor (see
page 71).
Troubleshooting
Fault codes
5692 799 GB
Summary of Contents for VITOLADENS 300-W
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