Wolf BWL-1 S - Page 112

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