28
EE KM BUS subscriber
Cause
Measure
Communication with a KM BUS subscriber not possi-
ble.
Check KM BUS subscriber list (
"Service functions"
"KM-BUS subscriber"
).
EF Modbus subscriber
Cause
Measure
Communication with a Modbus subscriber not possible. Check Modbus1 and Modbus 2 subscriber lists (
"Serv-
ice functions"
"Modbus1 subscriber"
/
"Modbus2
subscriber"
).
F2 Parameter 5030
Energy statement not calculated correctly.
Cause
Measure
Compressor output not selected.
Set parameter
"Output compressor stage 5030"
to
17 kW.
FF New start
Information display, no function restriction.
Cause
Measure
New start of heat pump control unit.
No action required.
No display on programming unit screen
1.
Switch on the system ON/OFF switch.
2.
Check heat pump control unit fuse. Replace fuse if
required.
3.
Check whether there is power at the heat pump
control unit. Switch on power supply if required.
4.
Check the plug-in and threaded connections.
5.
Replace programming unit if necessary.
6.
Replace controller and sensor PCB if necessary.
Troubleshooting
Message overview
(cont.)
5800 917 GB
Maintenance
