Error handling
59
11.3
Communication error defroster
1
GHX – Ground heat exchanger
Communication error defroster
backup heater/GHX
1
regulating flap
Check system and menu, if
accidentally released /
check DIP in BUS thermostat
Restart
O.K.?
Change
setting
Yes
Check
Cat 5 cable
O.K.?
Yes
Replace
BUS thermostat
Replace
connection
No
No
WARNING!
Do not touch the board
for under 230 V power
supply live components!