Error Code
high
Rational iCombi Classic – Error 42.x: Solenoid Valve Malfunction (Code )
On your iCombi Classic unit, error code 42.x indicates that a specific solenoid valve is failing to open, affecting critical functions like water intake,…
Rational Error Codes
Select Rational Model Series
Code List – 176 error codes found
Error Code
medium
Rational iCombi Classic – Error 40: Check the Care Pump (M18) in the Function Test
On your iCombi Classic unit, error code 40 indicates an issue with the care pump (M18). This pump is essential for the automatic cleaning…
Error Code
medium
Rational iCombi Classic – Error 37: Climate Control Malfunction – Check Hose Connections
On your iCombi Classic unit, error code 37 indicates a climate control malfunction, specifically related to the hose connections. This usually means there's an…
Error Code
high
Rational iCombi Pro – Error 35.x: UltraVent System Fault
On your iCombi Pro unit, error code 35.x indicates a fault within the UltraVent condensation hood system, ranging from electrical issues like missing voltage…
Error Code
medium
Rational iCombi Pro – Error 36: Differential Pressure Sensor Fault
On your iCombi Pro unit, error code 36 indicates a fault with the differential pressure sensor (P1), specifically a lack of 0.5V signal output.…
Error Code
medium
Rational iCombi Classic – Error 35: UltraVent® – Bus Signal / Internal Communication
On your iCombi Classic unit, error code 35 indicates a bus signal or internal communication issue with the UltraVent condensation hood. This prevents the…
Error Code
high
Rational iCombi Classic – Error 34.xx: Service – BUS Communication Error (PCB & Motors)
On your iCombi Classic unit, error 34.xx indicates a critical BUS communication failure affecting various internal components, including fan motors, the pump board, I/O…
Error Code
high
Rational iCombi Classic – Error 33.x: Gas Burner Error (Ignition & Gas Valve Control)
On your iCombi Classic unit, error 33.x indicates a problem with the gas burner system, potentially involving the gas tap, gas valve, or the…
Error Code
high
Rational iCombi Classic – Error 32.x: Ignition Box Error – Burner Branch Number
On your iCombi Classic unit, error code 32.x indicates a fault within the ignition system specific to a particular burner branch. This often points…
Error Code
medium
Rational iCombi Classic – Error 31.xx: Thermoelement Core Temperature Sensor B3 Fault or Emergency Mode
On your iCombi Classic unit, error code 31.xx indicates an issue with the Thermoelement Core Temperature Sensor B3, or a related USB core temperature…
Error Code
medium
Rational iCombi Classic – Error 30: Moisture Control Error – Differential Pressure Sensor P1
On your iCombi Classic unit, error code 30 indicates a problem with the differential pressure sensor P1, which is critical for accurate moisture control.…
Error Code
high
Rational iCombi Classic – Error 28.x: Thermoelement Error – Steam Generator B5 Overheating, Cooking Cabinet B1 Overheating or Underheating
On your iCombi Classic unit, error code 28.x indicates a thermoelement fault, specifically issues with the steam generator's B5 sensor or the cooking cabinet's…