7.2.1 CF1 Heating Failure
Detection
: The water is not reaching the required temperature in the specified time.
Remedy:
1. Possible Cause is overheating of the
circulation pump. Indication of this cause is if
the machine gives CF1 error code during a
cycle, but runs normally if the machine is
allowed to cool down. Check if the cooling
fan is running when the circulation pump is
running. If not, replace the fan (Figure 20).
If the fan is OK, proceed to step 2.
2. Using the debug screen check if the
pressure switch for the upper arm turns
ON when the circulation pump is ON. If not,
replace the upper arm pressure switch
(Figure 22). If OK, proceed to step 3.
3. Using the debug screen, monitor the
pressure switch during disinfection
(P3 only). If the switch turns OFF, the
pump is overheating. Check and replace
the cooling fan and/or the upper circulation
pump (Figure 20). If OK, proceed to step 4.
4. Check the fuses. If OK, proceed to step 5.
5. With the troubleshooting window in place,
start a cycle. After filling, the water level
should be approximately 10-15mm below
the lower wash arm. If the water level is not
correct, replace the level sensor (Figure 21).
If the water level is OK, proceed to step 6.
7.2 Cycle Faults
If the software detects an error, an error
message will appear on the screen
showing one of the codes listed below.
7. Troubleshooting
Heater
upper
circulation
pump
heater element
pressure switch
for lower arm
Fan
housing
level
sensor
Figure 20
Figure 21
P1 Regular
Instruments
Not Processed
CF3
TEMP. SENSOR 1 BAD
OK
Page 23
HYDR
IM
C51wd Service Guide
