Error handling
62
11.6
Error intake air too low
Check
DIP switch
position at
thermostat
O.K.?
Check
power supply
230 V at BUS
thermostat
O.K.?
Check
release at control
O.K.?
Check STB
at preheater
O.K.?
freeze
protection
available?
Error intake air
too low
Mount freeze
protection
No
WARNING!
Do not touch the board
for under 230 V power
supply live components!
Check
preheater by
cooling the sensor with
ice spray, measure power
supply 230 V at
preheater
O.K.?
Yes
Replace
preheater
Replace
STB
No
No
Yes
Yes
Yes
No
Other
menu
No
Yes
Establish
power supply
Yes
Replace
thermostat
Other position
(restart)
No
