7. Troubleshooting
7.2.3 CF3 Chamber temperature sensor reading failure
Detection:
Main temperature sensor readings are
outside limits (too high or too low)
Remedy:
1. Possible cause is disconnection of the
temperature sensor. Check the connection
of the sensor to the logic board (see section
4.5 Removing the Controller Assembly). If
OK proceed to step 2.
2. Possible cause is malfunction of the
temperature sensor. Remove the kick
plate. Replace the temperature sensor
as required.
7.2.4 CF 4 Water evacuation failure
Detection:
Chamber full switch did not open in 1 minute after turning the drain pump on.
Remedy:
1. Check for a kink or blockage in the drain hose.
2. Possible cause is drain pump failure.
Manually load 3 litres of water into the
chamber. With the troubleshooting window
in place, go into the service menu and
activate the drain pump. The water should
drain within 20 seconds. If it does not, remove
the top and bottom covers and replace the
drain pump (Figure 24a). If the water drains
ok, proceed to step 3.
3. Possible cause is chamber full switch failure.
Using the debug screen, check if the chamber
full switch is OFF when water had drained
from the chamber. If not, remove the top
cover and the chemical bracket. Check the
level diaphragm / switch assembly and replace
as necessary (Figure 24a).
temperature sensor
drain
pump
chamber full switch
Figure 23
Figure 24a
Figure 24b
Page 25
HYDR
IM
C51wd Service Guide
