Haier HSU-07HV03/R2 Service Manual page 61

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 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: outlet air is available 2 seconds later after startup.
Timer on, Timer off and sleep control are available.
Control of 4-way valve: When the unit is started for the first time, the 4-way valve starts
runnig 10 seconds earlier than compressor does. After compressor stops runnig, the
4-way valve continues running for 2 minutes and 30 seconds then stops. If changing
the unit from heating to cooling, the 4-way valve is shut off 2 minutes later and
compressor is started 3 minutes later.
Cold blast avoidance mode:
(1)Compressor is interrupted during the defrosting operation and continues to run after
defrosting is completed. When the indoor exchanging temperature is below 23¡æ,
the indoor fan motor is off. When the indoor exchanging temperature is above 23¡æ,
the indoor fan motor is running at weak speed.
(2)If the temperature of coil pipe can't be above 38¡æ 4 minutes later after startup, fan
motor is running at the preset wind speed.
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