MKN Oven Error Codes Service Menu Of The Electronic (Configuration menu) The service menu (configuration menu) serves for the check and analysis of all electronic components. These can be test one by one or by summarized test programs. If once the flash module should be exchanged, then this must be configured completely. In this case all steps must be carried out as well as a petition of equipment specific information is necessary.
MKN Oven Error Code Solutions
MKN Oven Error Codes A module preprogrammed by MKN can alternatively be installed. In this case the serial number must be announced with the order.
Access the configuration menu as follows:
– Select menu on the left select button
– Select 4 setup with the CombiPilot
– Push CombiPilot
– Enter password —- with the CombiPilot (enter number, push CombiPilot, enter next number)
and confirm with “start/stop”
– Select test step and confirm with the CombiPilot.
|Error core temperature probe
|Error chamber probe 1
|Error chamber probe 2
|Core temperature probe not calibrated
|Error drain probe
|Error reference probe on board defect
|Risk of ice
|Overtemperature cooking chamber
|Electronic too hot
|Core temp. replace not possible
|No fan 1
|No fan 2
|Fan direction wrong
|Jumper setting at frequency controller wrong
|Not authorized access
|No gas 1
|No gas 2
|No gas fan 1
|No gas fan 1
|General gas fault 1
|General gas fault 2
|No flame 1
|No flame 2
|12 Volt ground error
|UREF0. Ground error at probe or pcb
|Carry out unit configuration in the service area
➢ The pcb controls the DynaSteam unit which is responsible for the amount of injected water. The incoming water flow pressure must be between 1,5 (21,75 psi) and 6 bar (87,00 psi). The pressure switch controls the availability and the pressure of water (Only at units with WaveClean).
➢ The water runs now through a hose to the water supply pipe located in the chamber. Inside the hose is an orifice to stabilize the pulsed water flow from the DynaSteam unit.
➢ The water supply pipe injects the water on an centrifuge at the PHI fan wheel. The heating elements surround the fan wheel heats it up. The water gets to steam now and by the speed of the fan wheel tiny drops are flung against the chamber. Surplus water runs into the drain.
➢ During heat up and after opening / closing the door during operation the steaming unit increases the amount of water to speed up the steam production (controlled by the electronic).
➢ At a temperature of more than 107°C (225°F) the steaming unit decreases the amount of water (electronic controlled)
Basics of the gas technology
Operation of the gas burner:
The electronic (pcb) gives a heat demand (relay K14 and K15) to the burner control.
The electronic (pcb) regulates the speed of the gas fan and supervises these.
The complete igniting process is handled by the burner control.
At a failure of the flame signal from the burner control to the electronic the appliance is
nevertheless ready for use. There is an electrical failure of the signal which safety-related is
quite safe as long as no alarm is reported. (The burner control has recognized the flame (In this
case there is “just”an error to transmit information to the electronic The burner control itself
has already detected the flame).
The gas fan
The gas fan promotes the air-/ gas mixture into the burner. The promoting volume and the performance
are dependent on the speed of the gas fan. This is steered and supervised by the electronic. The speed
only can be changed in a defined speed window which is dependent on the kind of gas and unit size.
The speed window is basis of the equipment admittance and may not be changed. This regulation
ensures that the gas fan speed works independently of outer influences (temperature and supply
Fan speed control:
The gas fan is / are controlled by a PWM signal (pulse width modulation) from the electronic A2,
terminal X8.2 (6.x, 10.x, lower chamber at 20.x) and terminal X8.4 (upper chamber at unit size 20.x).
Without PWM signal and with available supply voltage the gas fan runs for safety reasons with full
speed. The gas fan transmit the fan speed to the electronic A3, terminal X5.2 (6.x, 10.x, 20.x lower
chamber) and terminal X5.5 (only 20.x upper chamber) as a re-registration. The gas blower is
regulated on set rotation speed by a software regulator. This can be checked with the help of the
configuration menu (service menu).
A speed fluctuation up to 50 rpm is normal.
The ignition electrode
The ignition electrode serves to ignite the gas/air mixture and is supplied by a separate transformer
The flame control
The flame control induces an ionization current (approx. 5 µA) after the igniting process and passes
this to the burner control. If this confirmation is not available, the error message Err 71 (no gas)
appears and a reset of the burner control is necessary.
A sufficient overlap-time is important to ensure for a safety ignition process. This time can be
controlled in the generally measurement mask.
When heating request of the temperature regulator is available, the display changes from G0 to G1.
At first F0 is still shown because there is no flame detected. At latest after 7 seconds F1 must be
shown on display, otherwise appears the error message Err 71 (no gas).
If the “flame OK” signal is permanently not available the unit goes into an emergency program,
because there is no safety risks represents.
In this case F0 does not change to F1 into the measurement mask, even though the flame is present
(The unit heats up). There is only a risk / error, if within the heat demand (active operating) the “flame
OK signal” changes repeatedly from F1 to F0.
Disconnect the unit from the power and gas supply. Wait at least 3 minutes until the capacitors on the
controller have unloaded themselves!
The frequency converter is fitted with a wide range input.
The input voltage can be configured with the link plug (Jumper) J1
Input voltage at the mains terminal inlet can be measured according to the following Jumper status.
To be measured are:
J1 Plugged: Area 200V-240V (-10%, +15%) Despatch status!!!
J1 Open : Area 100V-120V (-10%, +15%)
The voltage (live) phase L must be led through the Ferrite core before the mains terminal in the cable
harness, to avoid EMC-interferences in the appliance.
For the appliance sizes 6.1, 10.1 and 20.1 the Jumper J3 is not plugged (open, despatch status).
Therefore the Jumper must be plugged between J3 and J4 (horizontally). The fan runs max..
In the appliance sizes 6.2, 10.2 and 20.2 the Jumper J3 must be plugged (left Jumper vertically). The
fan runs max. 1800 rpm`s