Rational iCombi Classic Troubleshooting

1
Service error: 34.1 – 34.400 (BUS)
Bus fault index:Bus fault index:Bus fault index:
Error tree: BUS
Service error: 34.1 – 34.400 (BUS)
Unit type: iCombi
V03 · 04/2021 · RTS/Awei · en-GB
Display Service 34.1 to 34.400
Does the LED on component light up?
Disconnect and reconnect the bus cable to the relevant component.
Replace the bus cable Is the fault eliminated?
Is the fault eliminated?
Replace faulty component
Reason for motor failure:
Humidity: Checking the steam hose, connections water hoses, cooking chamber sensors, connection control box to exhaust pipe
Note: Observe motor auto addressing
1: Motor above
2: Motor centre
4: Motor below
8: Pump board
16: I/O - power supply unit
32: Ignition box
- 400: Complete failure
64: HF power supply unit
Replace the component
Is the voltage input present on the component?
Check voltage supply (K1)
Carry out a test run
Carry out a test run
Carry out a test run
120 Ohm termination: Terminating resistor used
Yes
Yes
No
No
Yes
No
No
Yes No
Yes
Yes
Yes

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