E6 Fault At Lon Subscbr - Viessmann VITOTRONIC 200 Service Instructions Manual

Troubleshooting
Message overview

E6 Fault at LON subscbr.

No communication via LON with the subscriber, e.g. a
lag heat pump of a heat pump cascade
Cause
Fault at LON subscriber
EE KM BUS subscriber
Cause
Communication with a KM BUS subscriber not possi-
ble.
EF Modbus subscriber
Cause
Communication with a Modbus subscriber not possible. Check Modbus1 and Modbus 2 subscriber lists ("Serv-
F2 Parameters 5030/5130
Energy statement not calculated correctly.
Cause
Compressor output not set.
FF New start
Information display, no restriction of functions: Indi-
cates that the heat pump has been re-started.
Cause
Heat pump control unit restart
■
If this occurs unexpectedly: Brief interruptions in the
■
power supply, e.g. loose contacts
Nothing displayed on programming unit display
1. Switch ON system ON/OFF switch.
2. Check heat pump control unit fuse; replace if nec-
essary.
3. Check whether there is power at the heat pump
control unit; switch on power supply if necessary.
4. Check the plug-in and threaded connections.
102
(cont.)
Measure
Read message memory at faulty LON subscriber. Rec-
tify fault at LON subscriber.
Measure
Check KM BUS subscriber list ("Service functions"
"KM-BUS subscriber").
Measure
ice functions" "Modbus1 subscriber"/"Modbus2
subscriber").
Measure
Set "Output compressor stage 5030/5130" parame-
ter accordingly.
Measure
After restart: No action required
If this occurs unexpectedly:
Check power supply of heat pump control unit.
■
Check ribbon cable in heat pump control unit.
■
5. Replace programming unit if necessary.
6. Replace controller and sensor PCB if necessary.
Installation and service instructions of the rele-
vant heat pump.