Wolf BWL-1 S Installation And Operating Instructions Manual page 112

Fault Short designation
code
108 Low pressure
109 High pressure
110 T_intake gas
(AWO)
111 T_hot gas
112 T_supply air
116 ESM (E1)
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
130 Invalid model
131 Excess
temperature, heat
exchanger
132 System
112
55. Troubleshooting
Possible cause
Low pressure fault (ODU)
(refrigerant circuit / intake gas side)
High pressure fault (ODU)
(refrigerant circuit / hot gas side)
Refrigerant temperature outside permissible
range
Cable to sensor is faulty
Sensor faulty
Hot gas temperature outside permissible
range (ODU)
Supply air temperature outside permissible
range (ODU)
External fault reported at programmable input
E1
BUS connection of AWO BUS interrupted,
no communication with ODU
No power supply to ODU
Defrost energy in heating circuit too low
during defrosting
Pressure outside permissible range
Cable to sensor is faulty
Flow temperature (AWO T_boiler) outside
permissible range
Cable to sensor is faulty
Sensor faulty
Evaporator temperature outside permissible
range (ODU)
Refrigerant inlet temperature outside
permissible range (ODU)
ODU or ODU component faulty
Compressor faulty (ODU)
Invalid assignment of parameters to outdoor
unit (ODU)
Temperature for heat exchanger of indoor
unit or outdoor unit is too high
System fault in IDU (AWO)
Remedy
Contact service engineer
Contact service engineer
Check cable and plug-in connection
Check refrigerant temperature
Check / replace sensor
Contact service engineer
Contact service engineer
Rectify the external fault
Check cable and plug-in connection
Check power cable of AWO BUS cable and
plug-in connections
Check ODU power supply
Check heating circuit flow rate and electric
heating, if necessary briefly reduce the heating
circuit volume
Check condenser temperature
Check cable and plug-in connection
Check flow temperature (AWO T_boiler)
Check cable and plug-in connection
Check / replace sensor
Contact service engineer
Contact service engineer
Contact service engineer
Contact service engineer
Contact service engineer
Automatic reset by control unit
Fault message is only for additional
information
3064298_201507