Sanyo MPR-411FR Instruction Manual page 14

OPERATING INSTRUCTIONS
2. Key lock operation
This unit incorporates a key lock feature which can inhibit the tampering using the keys on the control
panel.
The key lock is set to OFF at the factory.
Display
Table 2 Key lock setup procedure (Example: Key lock OFF
Operation
1 Press and hold the digit shift
key for about 5 seconds
2 Set the lower digit to "1" with
the numeric value shift key
3 Press the set key
Note:
Key lock can be set any time when the current refrigerator or freezer temperature is displayed.
If the numerical value shift key is held depressed for more than about 5 seconds, F0 is displayed. This
is one of the functions used by the service personnel and the figure should not be changed. To return to
the refrigerator or freezer temperature display mode, press the set key or leave the unit for about 90
seconds without pressing any key.
Mode
Key lock OFF Temperature change enabled
Key lock ON Temperature change disabled
Key operated
----- The current refrigerator or freezer
temperature is displayed.
The lower digit of the temperature
display blinks.
Pressing the key shifts up the
figure of the digit.
Key lock is set to ON and the current
SET refrigerator or freezer temperature is
displayed.
13
Function
Key lock ON)
Indication after operation Display mode
Temperature
display mode
Key lock
mode
Temperature
display mode