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MK / MKT (E5) 08/2020 page 41/162
5.8 Performance when opening the door
MK 56: Immediately after opening the door, the fan runs at the minimum speed (30%). 60 seconds after
opening the door, the fan turns off.
MK/MKT 115, 240, 720: The fan turns off immediately after opening the door.
After 60 seconds from opening the door, heating, and refrigeration turn off. The compressor continues
operating during 5 minutes without cooling function.
After closing the door, heating, refrigeration, and fan turn on again.
6. Start up
6.1 Turning on the chamber
After connecting the electrical supply (chap. 4), you can start up the chamber.
• MK 56: Turn on the main power switch (1) in the lateral control panel at least one hour before operating
the chamber.
• MK/MKT 115, 240, 720: Turn on the main power switch (1) in the lateral control panel and the rear
power switch (12) at least one hour before operating the chamber
The lit pilot lamp shows the chamber is ready for operation. When the chamber is turned on and yet the
controller display is dark, the display is in stand-by mode. Press on the touchscreen to activate it.
MK 56: The refrigerating function is available only one hour after turning on the main power switch (1). This
is indicated by the notification “Preheating phase” in the controller display.
MK/MKT 115, 240, 720: The refrigerating function is available only one hour after turning on the main power
switch (1) and the rear power switch (12). This is indicated by the information message “Preheating phase”
in the controller display.
Warming chambers may release odors in the first few days after commissioning. This is not a quality defect.
To reduce odors quickly we recommend heating up the chamber to its nominal temperature for one day
and in a well-ventilated location.
For control reasons the refrigeration machine starts with a delay time. The refrigeration ma-
chine also turns off with a 5 minutes delay. This explains why the compressor may remain op-
erating also during positive temperature jumps.
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