HDS Middle Range / HDS Premium Range
Unit Function
Service Manual 04.2008
Page 19 / 127
2.2.3 Error messages
Display
Note
Explanation
Rotating field incorrect.
Motor thermal contact (WSK) in the motor has actuated.
Mains voltage too low or too high or phase has failed or motor current
too high.
Check mains connection.
Check pump for sluggishness.
Insufficient water
Invert phase in the commuta-
ting pole plug
.
Switch off unit and
let the motor cool down.
Exhaust temperature too high
Perform burner maintenance.
Time monitoring active for 30
min, continuous pause/
continuous operation
Open water tap.
Ensure water supply.
Switch off unit and then
switch on again.