Wolf BWL-1S-05 Installation And Operating Instructions Manual page 111

Fault Short designation
code
110 T_intake gas
(AWO)
111 T_hot gas
112 T_supply air
118 PCB
interrupted
119 Defrost energy
124 AWO pressure
sensor
125 Boiler sensor AWO
126 Evaporator
temperature sensor
127 Refrigerant inlet
temperature sensor
128 ODU
129 Compressor
132 System
3064298_201805
Troubleshooting
Possible cause
Refrigerant temperature outside permissible
range
Lead to sensor is faulty
Sensor faulty
Hot gas temperature outside the permissible
range (ODU, CTT sensor)
Supply air temperature outside the
permissible range (ODU, OAT sensor)
Bus connection interrupted between IDU and
ODU
No communication between HCM-3, AWO-/
EWO board, ODU
No power supply to ODU
Defrost energy in heating circuit too low
during defrosting
Pressure outside permissible range
Lead to sensor is faulty
Flow temperature (AWO T_boiler) outside
permissible range
Lead to sensor is faulty
Sensor faulty
Evaporator temperature outside the
permissible range (ODU, OMT sensor)
Refrigerant inlet temperature outside the
permissible range (ODU, OCT sensor)
Fault in ODU or one of its components
Compressor fault (ODU)
System fault in IDU (AWO)
Remedy
Check lead and plug-in connection
Check refrigerant temperature
Check/replace sensor
(condenser temperature (IRT))
Contact service engineer
Contact service engineer
Check bus cable and plug-in connections
Check AWO/EWO board and HCM-3
Check ODU power supply
Check heating circuit flow rate and electric
heater; if necessary briefly reduce the heating
circuit volume
Check refrigerant temperature (ICT)
Check lead and plug-in connection
Check flow temperature (AWO T_boiler)
Check lead and plug-in connection
Check/replace sensor
Contact service engineer
Contact service engineer
Contact service engineer
Contact service engineer
Fault message is only for additional
information
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