Delta 21CK018C24 Instruction Manual page 21

3.4.14 Field Functions
Under off-state of the unit, press Function and Timer buttons continuously for 5s to go to the debugging menu.
Press Mode button to adjust the setting items and ▲ or ▼ button to set the actual value.
3.4.14.1 Ambient Temperature Sensor Setting
In field setting mode, press Mode button to adjust the temperature displayed location displaying 00, and press ▲ or
▼ button to adjust setting state at timer displayed location. There are 3 types for selection:
⑴ Indoor ambient temperature is that at return air inlet (01 is displayed at timer displayed location)
⑵ Indoor ambient temperature is that at the place of screen (02 is displayed at timer displayed location)
⑶ Return air inlet temperature sensor shall be selected for cooling, dry and fan modes and wired controller
temperature sensor (03 is displayed at timer displayed location) shall be selected for heating and auto modes.
3.4.14.2 Three Grades of Speed for Indoor Fan
In field setting mode, press Mode button to adjust the temperature displayed location displaying 01 and press ▲ or
▼ button to adjust setting state at timer displayed location. There are 2 types for selection:
⑴ 3 low grades (LCD displays 01)
⑵ 3 high grades (LCD displays 02)
Three low grades indicate high, medium and low grades and 3 high grades indicate super-high, high and medium
grades.
Press Enter/Cancel button to save the setting and quit after setting. If there is not any operation within 20s after the
system responds to the last button operation in this interface, the system will quit this menu and display normal
off-state; meanwhile, current setting won't be saved.
3.4.15 Other Functions
3.4.15.1 Lock Function
Upon startup of the unit without malfunction or under off-state of the unit, press ▲ and ▼buttons at the same time
for 5s till the wired controller enters lock state. In this case, LCD displays
at the same time for 5s to quit lock state.
Under lock state, any other buttons won't give any response to the press.
3.4.15.2 Memory Function
Memory switchover: Under off-state of the unit, press Mode and ▲ buttons at the same time for 5s to switch
memory modes. During setting memory mode, Memory will be displayed. If this function is
not set, the unit will be under off state after power failure and then power recovery.
Memory recovery: If memory mode has been set for wired controller, the wired controller after power failure will
resume its original running state upon power recovery.
Note:
It will take about 5 seconds to save all the information, therefore, please do not cut down the power at this time,
or it may fails.
3.4.15.3 Selection of Centigrade and Fahrenheit
Under off-state of the unit, press Mode and ▼ at the same time for 5s, the displayer panel will switch between
Centigrade and Fahrenheit.
. After that, repress these two buttons
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