Rational Combi Master, Training Manual

Page: 158 / 200

158
Trouble shooting SCC
Edition 10-2008a
Service 26 (Drain Valve)
Micro switch ball valve in permanent closed position.
Unit out of order
Indication Service 26
Activate ball valve in the function
test.
NO
YES
Output voltage at I/O
pcb X25 7/8 (12V DC)
present?
Change I/O pcb
Check motor ball valve, micro
switch, cable, connector. Complete
ball valve unit must be changed.
NO
Service 27 (Drain Valve)
Micro switch ball valve in permanent open position.
CleanJet can not be used
Indication Service 27
Separate unit from mains (swit-
ching off and on with main switch
is not enough). After approx. 5
seconds connect unit to mains .
YES
YES
Is Service 27 deleted?
Start a CleanJet-program and
check for correct function
Change I/O pcb
NO
Output voltage at I/O
pcb X25 7/8 (12V DC)
present?
Ball valve blocked by dirt.
Motor of ball valve, micro switch,
cable and/or connector defective.
Change unit if necessary
Activate ball valve with the func-
tion test
NO
Should Service 27 appear more often and I/O-pcb with revision status 402 respec. 403 is installed,
change I/O-
pcb