Haier HSU-07HV03/R2 Service Manual page 44

the indoor fan motor can be operated in cooling mode. While controlling fan motor by hand in
cooling mode, the cooling ranges include wind speed setting and refriferation range, others are the
same as fan motor in automation mode.
compressor control£º The compressor can't be controlled by temperature sensor in 2 minutes after
startup and also can't be started again at least 3 minutes later after shutdown. There are
3-minutes protection with power on for the first time (over 3 minutes with power off). The
compressor must be started again 3 minutes later after shutdown.
There is no 2-minutes limit when changing the temperature setting or shutting off the machine
through the remote controller, and the machine can be shut down immediately.
Avoiding electrical shock: outdoor fan motor is available 2 seconds later after compressor startup.
Controlling the position of air door: set the position of air door as required.
Protection of expiration of current peak value is available: Current cross detection is available in order
to avoid burning out the compressor when the current is too big. The action character as
follows:
The compressor can't be detected in 60 seconds after startup. when current is above "CT 1.6 V"
and lasts 3 seconds, the system enter protection mode and shut off compressor with outdoor air
blower and indoor fan motor controlled as the temperature sensor is off. After 3 minutes the
machine can be started again.
Protection of frost is available (disable in test run or heating mode): In order to prevent the indoor heat
exchanger from freezing (in refrigation or dehumidifying mode), the compressor will be shut
off when the temperature of the indoor coil pipe is or below 0¡æ and the compressor runs
for over 5 minutes. When the temperature of the indoor coil pipe ascends to over 7¡æ, the
compressor is restarted (must meet a 3-minutes delay)
Timer on, Timer off and sleep control are available.
2.4 Heating mode: (Tr: inlet air temperature,Ts£º the set temperature)
The background lighting of the LCD is red
Temperature control range : 16¡æ¡ª 30¡æ
Temperature control precision: ±1¡æ
Control Character:
When Tr ≤ Ts, compressor, four-ways valve and outdoor fan motor is on, indoor fan motor runs as
in cold blast avoidance mode, and 4¡æof compensation is added after compressor is started.
When Tr>Ts+5¡æ, compressor is off, and the indoor fan motor runs as in cold blast avoidance
mode.
When Tr<Ts+5¡æ, compressor, four-ways valve and outdoor fan motor is on, and the indoor fan
motor runs as in the mode of avoiding cold blast.
Control of indoor fan motor:
Manual operation: The wind speed can be set to high, medium, low or automatic as required.
Automatic operation: When Tr < Ts, the wind speed is high;
Control of air door: setting the position of air door as required.
compressor control£º The compressor can't be controlled by temperature sensor in 2 minutes after
startup and also can't be started again at least 3 minutes later after shutdown. There are 3-minute
protection with power on for the first time (over 3 minutes with power off). The compressor must
Air Conditioner
When Ts=<Tr<Ts+2¡æ, the wind speed is medium.
When Tr>= Ts+2¡æ, the wind speed is low.
Edition:2006/1/10