Wolf BWL-1 S, Installation And Operating Instructions Manual, Page: 111 / 120

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55. Troubleshooting
Fault
code
Short designation Possible cause Remedy
12 Boiler sens. faulty Flow temperature (T_boiler) outside
permissible range (0 … 95 °C)
Check flow temperature (T_boiler)
Cable to sensor is faulty Check cable and plug-in connection
Sensor faulty Check / replace sensor
14 DHW sensor faulty DHW cylinder temperature outside
permissible range (0 … 95 °C)
Check DHW cylinder temperature
Cable to sensor is faulty Check cable and plug-in connection
Sensor is not correctly positioned at
measuring point
Check position of sensor and if necessary
insert sensor correctly
Sensor faulty Check / replace sensor
15 Outs. sensor faulty Outside temperature outside permissible
range (-39 … 50 °C)
Cable to sensor is faulty
Check cable and plug-in connection
Sensor faulty Check / replace sensor
16 T_return Return temperature outside permissible
range (0 … 95 °C)
Check return temperature
Cable to sensor is faulty Check cable and plug-in connection
Sensor faulty Check / replace sensor
32 Power failure 23 V 23V power supply failure Contact service engineer
35 BCC missing Appliance type connector missing Insert suitable appliance type connector
37 BCC incompatible Wrong appliance type connector Insert suitable appliance type connector
52 Max. cylinder
heating time
The maximum cylinder heat time is longer
than permitted
Cylinder sensor (T_DHW): Check position and
insert correctly if necessary
Check parameter WP022 and adjust if
necessary
Descale cylinder
78 Header sensor
fault
Header temperature outside permissible
range (0 … 95 °C)
Cable to sensor is faulty
Check cable and plug-in connection
Sensor is not correctly positioned at
measuring point
Check position of sensor and insert correctly
if necessary
Sensor faulty Check / replace sensor
101 Elec. heating Electric booster heater not connected Check cable and plug-in connection
Acknowledge fault if WP090 = OFF
High limit safety cut-out of the electric heating
has tripped:
Before commissioning the heat pump
Perform reset of high limit safety cut-out on
electric heating
Scale build-up in electric heating Have the notes in the installation instructions
regarding hot water treatment been observed?
Perform reset of high limit safety cut-out on
electric heating, after max. 3x resets, replace
electric heating.
Air in the electric heating Dry fire, replace the electric heating rod
104 Fan Fan communication interrupted (ODU) Contact service engineer
107 HC pressure Pressure in heating circuit outside
permissible range (0.5 ... 3.0 bar)
Check pressure in heating circuit
Cable to pressure sensor faulty Check cable and plug-in connection
Pressure sensor faulty Replace pressure sensor