Functions And Control; Main Functions And Control Specification - Haier HSU24VCK Service Manual

5 Functions and control

5.1 main functions and control specifications
Including brief introduction to air conditioners of series models and electric control function.
5.1.1 Automatic running
(1) Single cold automatic run mode:
After entering into this mode, the main control "MCU" determines the corresponding work pattern according
to the indoor temperature so as to maintain the preset temperature (the preset temperature is 78° F). When
the indoor temperature is below 78° F, outlet air from compressor is off, the automatic wind from fan motor
is low, and wind can be set to high, medium or low by hand. When the indoor temperature is or above 78° F,
the unit enters the cooling mode and conducts the cooling programme (the preset temperature is 78° F),
outlet air from compressor is on and indoor fan motor run in fixed wind speed
5.1.2 Indoor temperature control
Temperature control range : 60°F ---86°F
Temperature control precision: ±2°F
Compressor can't be controlled by temperature sensor within 2 minutes after it starts
Cooling mode:
When Tr> Ts, outdoor fan motor and compressor on, and indoor fan motor run at fixed wind speed. When Tr
< Ts, outdoor fan motor and compressor off, and when Tr > Ts, outdoor fan motor and compressor are working
again .If Tr=Ts, the indoor fan motor , outdoor fan motor and the compressor's state will not change.
5.1.3 Cooling run mode:
emperature control range : 60°F---86°F
temperature control precision:±2°F
compressor can't be controlled by temperature sensor within 2 minutes after it starts.
control character: when Tr ≥ Ts, outlet air from compressor is on and indoor fan motor run at fixed wind
speed. When Tr < Ts, outlet air from compressor is off , and when Tr>Ts,outlet air from compressor is on.
wind speed control: (the temperature difference is 1
auto: whenTr>=Ts+5°F , the wind speed is high;
When Ts+1°F ≤Tr<Ts+5°F , the wind speed is medium.
When Tr< Ts+1°F , the wind speed is low.
When temperature sensor is off, the fan motor runs at low speed.
when the wind speed changes from low to high, thereis no delayand when it changes from high to low,
there is a 3-minutes delay before conversion.
Manual operation:When unit is on the wind speed can be set to high, medium, low or automatic as required
(execute instruction 2 seconds later after receiving remote signal)
Compressor control The compressor can't be controlled by temperature sensor within 2 minutes after start
up and can be only restarted at least 3 minutes later after shutdown. There is no 3-minute protection with power on
for the first time (over 3 minutes with poweroff). The compressor must sta nds by for 3 minutes before it is
restarted after shut down.
There is no 2-minute limit when changing the temperature setting or shutting down the machine through
remote controller, and the machine can be shut down immediately.
the
Avoiding electrical shock: outlet air is available 2 seconds later after startup.
High temperature expiration protection:
HSU24VCK-SM
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10
Functions and Control
DomesticAirConditioner