21
All messages are clearly identified by a unique
2-digit message code.
01 System fault
Cause
Action
Control unit processor faulty.
Replace controller and sensor PCB.
02 Data error stand.settg
Cause
Measure
Delivered condition set after recognition of data error.
Reconfigure system.
05 Refrigerant circuit
Additional code
Cause
Action
Last message in message histo-
ry, refrigerant circuit
Fault message from the refrigerant
circuit controller
Observe
"Diagnosis"
"Refrigerant
circuit"
"Message history"
.
07 Fault refrigerant circ
Additional code
Cause
Measure
Last message in message histo-
ry, refrigerant circuit
Message from the refrigerant circuit
controller
Observe
"Diagnosis"
"Refrigerant
circuit"
"Message history"
.
10 Outside temp. sensor
An outside temperature value of
–
40 °C is used to cal-
culate the set flow temperature.
Cause
Action
Short circuit, outside temperature sensor
Check resistance value (NTC 10 k
Ω
) at plug F0 (see
"Controller and sensor PCB"); replace sensor if re-
quired.
18 Outside temp. sensor
An outside temperature value of
–
40 °C is used to cal-
culate the set flow temperature.
Cause
Action
Lead break, outside temperature sensor
Check resistance value (NTC 10 k
Ω
) at plug F0 (see
"Controller and sensor PCB"); replace sensor if re-
quired.
Troubleshooting
Message overview
5800 917 GB
Maintenance
