Rational iCombi Classic Service & Reference Manual page 2

| SERVICE REFERENCE iCombi
19.x
-1: EEPROM missing or not recognised; -2: Internal storage
error (battery may have been removed)
20.x Thermocouple:
-1: cooking cabinet B1; -2: control B2; -4: humidity B4;
-8: steam generator B5; -16: Cooking cabinet bottom B9
(floor units)
23
Temperature rise on the steam generator without request
Steam heating check
24 Temperature rise in the cooking cabinet without request
Hot air heating check
25
No water detection without cleaning
Fan wheels not running/no increase in performance at the
fan motor, when water jet hits: Check the water supply,
pressure, hoses, CDS sensor, position of GN conductors and
mobile oven racks
28.x Thermal element:
-1: steam generator too hot (B5 > 170 °C [338 °F]);
-2: cooking cabinet too hot (B1 > 350 °C [662 °F]); -4: steam
generator (B5 < 2 °C [36 °F], heating possible again from
4 °C [39 °F])
29.x
Overtemperature PCB:
-1: Fan motor top; -2: Fan motor bottom; -4: Fan motor
middle; -8: Pump PCB; -16: I/O board; -64: CPU board
30 Humidity measurement not working correctly
Pressure sensor P1, connection hoses, measuring connec-
tion pieces, humidity sensor B4
31.x
Thermocouple core temperature B3:
-1: Core probe defective; -11: External core probe error
32.x Fault in combustion system or gas supply (y = combustion
system):
-1.y (22: HA top, 32: steam, 42: HA bottom):
5x unsuccessful ignition process
-2.y (17/18/49: HA top, 27/28/52: steam,
37/38/55: HA bottom):
Flame current measured with gas valve closed
-3.y (19: HA top, 29: steam, 39: HA bottom):
Burner went out 5 times during the burning phase
-4.y (20: HA top, 30: steam, 40: HA bottom):
The speed of the gas blower deviates from the target speed
by more than 150 rpm
80.51.885 RTS/Doem V07 - 10/24 en-GB
33.x
Error in the control of the combustion system:
-1: Accumulation of combustion system errors; -2: Auto-
matic burner control initialised with incorrect gas speeds (=0
or Min<Start<Max not fulfilled); -3: Mains frequency outside
40...70 Hz; -4: Phase and neutral conductor mixed up;
-5: Automatic ignition controller error
34.x
Bus signal missing:
-1: Motor top; -2: Motor centre; -4: Motor bottom (floor
units only); -8: Pump PCB; -16: I/O power supply;
-32: Automatic ignition controller
35 UltraVent: Bus signal / internal communication
35.x UltraVent error:
-1: Voltage missing; -2: Filter detection faulty (UV Plus only);
-3: Thermocouple control error; -4: Thermocouple motor
protection error; -5/6: Dirt in filter (pre-warning/immedi-
ate replacement); -7: Filter not inserted/no differential pres-
sure measured
36
Differential pressure sensor fault (no signal output of 0.5V;
check 12V at P1); P1 must be installed horizontally
37 Climate control malfunction: Check hose connections
40 Check the care pump (M18) in the function test (note: Y4 is
activated at the same time, run the rinse programme)
42.x Incorrect water flow or incorrect flow detection via valve:
-1: filling Y1 to steam generator; -2: control Y2 to control
solenoid; -4: Care Y4 to care container
44 Steam heating faulty or inadequate during cleaning
46.1 SC-pump malfunction (M4)
47.1
Wastewater pump malfunction (M15)
48.1 Circulation pump (M17)
49.1 Care pump malfunction (M18)
50 Real time clock (date and time) not initialised
51 Check battery, replace if necessary
52.1 LED cooking cabinet light faulty
55 Error fan motor top:
Fan motor top does not reach the set speed. Heating request
is blocked.
56
Error fan motor bottom:
Fan motor bottom does not reach the set speed. Heating re-
quest is blocked.
57
Error fan motor middle:
Fan motor middle does not reach the set speed. Heating re-
quest is blocked.
63 Water detected after dry calibration, repeat self-test with
water
64 Unit calibrated dry – attempt to start humid cooking mode
70.1
Cooling fan malfunction
71.x Power supply error:
-1: General failure; -2: Undervoltage (< 170V)
72 eSTL safety chain has tripped. For cause of trip, see "eSTL
A15/A16: Diagnostic LED"
73
Check air filter due to overtemperature in the electrical in-
stallation room
75.x Internal bus interface:
-1: Additional board energy optimisation not detected;
-2: Additional PCB 4-way relay is not detected;
-4: (USA ONLY) voltage switching PCB is not detected
76.x
USA units ONLY
Voltage switching board error:
-1: Voltage too low; -2: Internal check failed; -3: Incorrect
voltage setting; -4/5/6/7: Internal faults
90 Unit not yet calibrated, carry out calibration
110
SC pump faulty while care solution is in the steam generator
(Remove error and set to released under Basic settings
"Cleaning unlock")
120 Level electrode without signal while care solution is in the
steam generator
(Remove error and set to released under Basic settings
"Cleaning unlock")
121 Additional function when operating the unit without water:
Note on filling water in the control box
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