Technical data

Air Top 2000 ST Troubleshooting
505
F 12 Heater unit lock-out 07 The permanent heater fault lock-out
has been activated
Remove the fuse and reinsert it
NOTE
The following error has occurred several
times:
Fault counter more than 3 times
Incorrect start counter more than 9 times
Overheating counter more than 3 times
F 14 Overheating sensor
incorrect position
97
Incorrect position of the overheating
sensor (OHS gradient too low)
Position the overheating sensor correctly
F 15 Setpoint generator
short circuit
9B Nominal value potentiometer circuit
break or short circuit to + Ub
Check cables/ replace control element
Error
code
Error (group) Additional information during PC
diagnostic
Troubleshooting
Fig. 503 Troubleshooting