Rational iCombi Classic Troubleshooting

1
Service error: 120
Error tree: Level electrode S2 detects no resistance
Service error: 120
Unit type: iCombi
V03 · 5/2021 · RTS/Bret · en-EN
Display Service 120
Reset faults by successfully running the abort programme
Water tap open. Water tap OK? Check water filter, pressure and hoses
In the functional test
Activate solenoid valve Y1 Filling.
After filling the Care chemical and control Y1, the level electrode S2 does not recognise any water level.
Result: Steam generator cannot be rinsed!
Chemical residues remain in the steam generator.
No
Solenoid valve open
Functional test not selectable
Water flow rate Y1 very low
Check voltage input on
conducting path
Check steam generator filling path Are the Combi water box, pump
housing (SC pump), demand branch, inlet hose from the solenoid
valve, hoses CWB to pump clean?
clean
Is there a sufficient amount of water at the unit
water tap connection? (min: 12 L / min)
Dirt filter on the unit connection is clean
Water flow rate Y1 very low
Pull the bus connector from the motor or circuit
board and force Service 34
In Service Mode
Abort process and fill steam generator with
functional test Y1.
Water flow rate sufficient
Check Function/Wiring /Connection of level
electrode
Logic error check plug and cable or replace circuit
board
Change 5-fold solenoid valve
Yes
Yes
No
No
Yes
Yes
Yes
Yes Yes
Yes
Yes
Yes
No
Yes
No

Rational iCombi Classic Specifications

General

Model	iCombi Classic
Material	Stainless steel
Cooking Modes	Convection, Steam
Temperature Range	30°C to 300°C
Capacity	10, 20
Power Supply	400V 3-phase
Power Consumption	Varies by model
Dimensions	Varies by model
Weight	Varies by model
Cooking Levels	10, 20, or 40