Max BC-RT-TRX-CyG-4 Operating Manual page 41

Child safeguard/operating lock
( ). The adjustable temperature range is also restricted. The
minimum and maximum temperature upper limits are be-
tween 5.0 °C and 24.0 °C.
The advanced operating lock is deactivated in the initial state.
Activating the operating lock:
• Press the Auto/Manu button longer than 3 seconds. Se-
lect the menu item „Loc" with the handwheel and confirm
with the Boost button.
• Next, enter the default four-digit code 1357. Use the hand-
wheel to select each digit one after the other. Once you
have selected the correct digits, press the Boost button to
confirm. The cursor moves to the next digit automatically.
• After you have selected the correct code, "ON" or "OFF" is
displayed. Select the required state using the handwheel.
"On" means that the advanced operating lock is activated.
"OFF" deactivates the operating lock. Select "ON" and press
the Boost button to confirm your selection.
• The advanced operating lock is now activated and the
- symbol is displayed.
• If you enter an incorrect code, the display switches back
to normal immediately.
Deactivating the operating lock:
• If the - symbol is displayed, the advanced operating
lock is activated.
• Press the Auto/Manu button longer than 3 seconds to de-
activate the lock.
• Enter the default four-digit code. Use the handwheel to
select each digit one after the other. Press the Boost but-
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