Rational CombiMaster CM Manuel d'utilisateur télécharger pdf (Page 116)

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Fault List SCC

No function - safety chain

No function

Power supply ok?

Check main fuse of the

power supply and earth

leakage breaker

Fuse F1/F2 and

contactor K1 ok?

Replace defective part

and find reason for tripping

Press dry up protector of steam

generator

Is unit on now

Check steam heating

elements, SSR, water

supply, scale build up

yes

Press safety thermostat of interior

cabinet

Is unit on now

Check SSR, hot air

heating element

yes

Input voltage at control

transformer T1 present

Check cable and

connector

Is green LED on

I/O pcb on

12 V supply at X14 pin

3 and 4

present

Check I/O pcb

yes

Check control transformer

cable and connector

Is green LED on

processor pcb on

yes

Check bus cable between

I/O and processor pcb

(X51)

Check processor pcb

Input voltage at connector

X1 (2,5V) of control pcb

present

Check control transformer

cable and connector

Check/change processor

pcb

Is main switch S1 working?

Check switch,

Change pcb if necessary

Ribbon cable between

operator and processor

pcb connected correctly?

Check cable and

connection

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Rational CombiMaster CM Manuel d'utilisateur Page 116

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