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it is not turn off.
K3/K4 key (colder /warmer)
Temperature setting switch of down zone: Under normal conditions the tempera-
ture display will flash and indicates the current temperature of the down zone.
Pressing the K3/K4 key when setting the temperature, the temperature displayed
will decrease or increase in an increment of one degree. If the K3 (colder) or K4
(warmer) key is pressed and held for one second, the temperature displayed will
decrease or increase in a speed of one degree per one second.
The temperature display will flash 5 seconds after the temperature been set, and
indicates the current temperature.
K5 key (C°/F°)
The temperature display can be changed between Celsius and Fahrenheit by
pressing K5 key.
K6 key (up interior light)
Interior light control switch of the up zone： To turn on or turn off the interior light,
by pressing K6 key once for each time. The interior light will keep lighting if it is
not turn off.
K7/K8 key (colder /warmer)
Temperature setting switch of up zone： Under normal conditions the temper-
ature display will flash and indicates the current temperature of the up zone.
Pressing the K7/K8 key when setting the temperature, the temperature displayed
will decrease or increase in an increment of one degree. If the K7 (colder) or K8
(warmer) key is pressed and held for one second, the temperature displayed will
decrease or increase in a speed of one degree per one second. The temperature
display will flash 5 seconds after the temperature been set, and indicates the cur-
rent temperature.
