Rational iCombi Quick Service Reference page 2

| SERVICE REFERENCE iCombi
A calibration is necessary for:
the following service work:
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as soon as the fan wheel has been removed, installation of a new air
baffle, modification/type change of the hinging racks
customer complaints about uneven cooking results (but only after
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checking the installation conditions)
subsequent changes to the installation conditions for extractor
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hoods or Combi-Duo
subsequent change of the installation site with a change of the in-
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stallation altitude by more than 300 metres (otherwise only a recal-
ibration is recommended)
Start conditions: Cooking cabinet sensor B1, control sensor B2, humidity
sensor B4: < 40°C. In order to achieve the best possible calibration val-
ues, a closed GN container should be inserted 20 mm deep with the
open side down in the middle in front of each fan wheel.
The calibration values are determined during the self-test or calibration
and stored on the SD card and PCB.
After a successful self-test, a flue gas analysis must be carried out for gas
units!
C
ALIBRATION ERRORS
The following calibration errors can occur during the self-test or a
manual calibration:
(Error step | Error code)
(1 | 2) B1 too hot (1 | 4) B2 too hot (1 | 8) B4 too hot; Combination
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of error codes is possible!
(2 | 1) Differential pressure too low (2 | 2) Differential pressure too
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high; Check P1
(4 | 1), (10 | 1), (15 | 1) Determined calibration value too low
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(4 | 2), (10 | 2), (15 | 2) Determined calibration value too high; Check
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the hose
(X | 999) Timeout in calibration step; e.g.: Cooking cabinet door
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open, check heating register/SSR
Calibration step 20: Calibration completed successfully
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RROR CODE
Beware of electric shock, even when the unit is switched off:
I/O power supply unit (A10), pump PCB (A13), eSTB (A15/A16) and
solenoid valve block.
Service Description
10 SC pump, Combi water box, pump-off hose
11 Level electrode, CDS sensor flow rate, I/O PCB
12 Check CDS sensor
13
Check level electrode
80.51.872 RTS/Doem V06.3 - 07/24 en-GB
14
Check level electrode, measure conductivity of water
19.1 Check SD card
20.x Thermocouple break: -1 cooking cabinet B1; -2 control B2;
-4= humidity B4; -8= Steam generator B5; -16: Bottom
cooking cabinet B9 (floor units); -32: Installation area B10
(XS); -64: Cooling faniCareSystem AutoDose
25 No increase in performance at the fan motor when the water
jet hits: Check water supply, pressure, hoses, CDS sensor,
position of hinged racks / mobile oven racks
26
XS only: Drain valve does not open; test in the function test,
replace if necessary
27 XS only: drain valve does not close; test in the function test,
replace if necessary
28.x
Thermocouple: -1: Steam generator too hot (B5 > 170 °C);
-2: Cooking cabinet too hot (B1 > 350 °C); -4: Cooking cab-
inet too cold (B1 < 2 °C [36 °F])
29 CPU board temperature too high (>75 °C; > 167 °F)
30
Humidity control error; Check differential pressure sensor
P1
31.x Thermocouple core temperature B3: -1: Check cooking cab-
inet core probe; -2: Cooking cabinet core temperature
sensor emergency mode; -11/12: Check USB core probe
1 / emergency mode; -21/22: Check USB core probe 2 /
emergency mode
32.x Fault in combustion system or gas supply,
x= fault, 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
33.x
Error in the control of the combustion system, x= error
-1: Accumulation of combustion system errors
-2: Automatic 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: Check automatic ignition controller
34.xx Bus signal missing: -1 motor top; -2 motor centre; -4 motor
bottom; -8 Pump PCB; -16 I/O power supply; -32 ignition
box; -256: Chemical controller
35 UltraVent: Bus signal / internal communication
35.x UltraVent error: -1 voltage missing; -2 filter detection faulty;
-3 check thermocouple control; -4 check thermocouple mo-
tor protection; -5: Pre-warning (change filter) -6 dirt in filter
(immediate replacement); -7 Filter not inserted/no differen-
tial pressure measured
36 Check differential pressure sensor (no signal output of 0.5V;
check input signal 12V at P1); P1 must be installed horizont-
ally
37 Climate control malfunction: Check connecting hoses
40 iCombi Pro:
Error in iCareSystem, hose to steam generator (partially)
blocked or kinked
iCombi Pro with option iCareSystem AutoDose:
Error in iCareSystem, hose to steam generator (partially)
blocked or kinked, steam generator outlet (Y21) does not
open (valve jams and always remains closed)
42.x Solenoid valve x does not open: -1: fill Y1; -2: control Y2; -3
Moistening Y3; -4 Care Y4; -5 Climate Y5 / Y15; -6 Rinse
valve Y14
43 Solenoid valve does not close
44 Check steam heating
45.x -1: Cartridge valve 1 fault; -2: Cartridge valve 2 fault; -3:
Cartridge valve 3 fault; -4: Cartridge valve 4 fault; -5: Outlet
cleaner box fault; -6: Outlet steam generator fault;
46.1 SC pump (M4): Incorrect rpm/power consumption
47.1 Wastewater pump (M15): Incorrect rpm/power consump-
tion
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