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Haier HSU-12LV03 Service Manual page 8

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ELECTRICAL CONTROL
ELECTRICAL CONTROL
ELECTRICAL CONTROL
2.Control function:
2.1Timer function: You can set 24-hour timer on or timer off as required, and the minum time unit is 1
minute. After setting, a pattern of clock displaied on the LCD, and it is off when timer setting is
completed. There are several timer mode as follows.
Timer on: The pattern of clock displaied on the LCD,the background light is off, and unit
behaves with halt status. Timer on is completed, and then unit starts running with the pattern
of clock disappeared,and the background light is on. The unit starts with the last setting
receiving timer signals, and sleep setting is not allowed.
Timer off: Unit working, the pattern of clock displaied on the LCD; When reaching time
setting, unit enters shutdown mode, and sleep function can be set. If timer off and sleep are
set synchronously, the one which time is short run first. Executing shutdown instruction clear
timer and sleep function.
Timer on and timer off can be set synchronously. when they are completed,
2.2 Sleep function (saving function at night):. The pattern of moon and star displaied on the LCD
In cooling/defrosting mode, the temp. setting increases 1one hour later after startup. After
another hour the temp. setting increase by more 1
hours and then close.
If the wind speed is set to high or medium before going to bed, the wind speed shifts to
medium or low. If the wind speed is set to low before going to bed, the wind speed keep
unchanged.
2.3 Protection of malfunction of temperature sensitive resistance.
The temperature sensitive resistor is short circuit or open circuit, the machine doesn't work.
During defrosting, don't detect if the temperature sensor short circuit or open circuit.
Detect the temperature of coil pipe is below -40
pipe is open.
Detect the temperature of coil pipe is above 95
is short .
Detect the temperature of inlet air is below -20
is open.
Detect the temperature of inlet air is above 90
is short.
2.4 Emergency switch imput:
Press the switch of emergency operation, then buzzer rings once and unit enters the automatic
operation mode. (emergency operation)
Air Conditioner
C and then run continuously for another 6
O
C . then think the temperation circuit of coil
O
C .then think the temperation circuit of coil pipe
O
C.then think the temperation circuit of inlet air
O
C. then think the temperation circuit of inlet air
O
4
Edition:2006/8/20

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