32
Function and Control
(4) Heating Mode
1. Conditions and processes of heating operations: (Tindoor ambient is the actual detection temperature of indoor environment thermo-bulb,
¨
Theating
indoor ambient temperature compensation is the indoor ambient temperature compensation during heating operations)
(1) If the compressor is stop, and [(Tindoor ambient –
¨
Theating indoor ambient temperature compensation) –Tpreset]
0.5
ć
, start the machine to enter
into heating operations for heating;
(2) During operations of heating, if 0
ć
[(Tindoor ambient –
¨
Theating indoor ambient temperature compensation) –Tpreset] < 2
ć
, the heating operation
will be still running;
(3) During operations of heating, if 2
ć
[(Tindoor ambient –
¨
Theating indoor ambient temperature compensation) –Tpreset], the heating operation will
stop after reaching the temperature point.
2. The temperature setting range in this mode is: 16~30
ć
.
(5) Defrosting Control
1. After the time for defrosting is judged to be satisfied, if the temperature for defrosting is satisfied after detections for continuous 3minutes, the defrosting
operation will start.
2. Start to defrost: Compressor stops and starts up 55S later;
3. Defrosting finish: Compressor stops and starts up 55S later;
4. Conditions of finishing defrosting
The defrosting operation can exit when any of the conditions below is satisfied:
(1) Toutdoor pipe
12
ć
;
(2) Toutdoor ambient
⧞
-5
ć
, and the Toutdoor pipe
6
ć
last more than 80S;
(3) The continuous running time of defrosting reaches to 8min.
(6) Compressor Control
1. The frequency of compressor will be controlled with the relationship of ambient temperature and preset temperature and changing speed of ambient
temperature;
2. Start the compressor after starting cooling, heating, dry operations, and the outdoor fan start for 5s;
3. When the unit is off, in safety stops and switching to fan mode, the compressor will stop immediately;
4. In all modes: once the compressor starts up, it will not be allowed to stop until having run for the [tmin. Compressor running time] (Note: including cases
of shutdown when the temperature point is reached; except the cases requiring stopping the compressor such as fault protection, remote shutdown, mode
switching etc.);
5. In all modes: once the compressor stops, it will be allowed be restart after 3-minute delay (Note: The indoor units have a function of power memory, the
machine can be restarted after remote shutdown and powering up again without delay).
(7) Outdoor Fan Control
1. When the unit is off by remote control
ʙ
in safety stops and stop after reaching to the temperature point.
2. In fan mode: The outdoor fan stops;
3. Start to defrost: Outdoor fan will stop after compressor stops for 50S;
4. Defrosting finish: Outdoor fan will start up when the compressor is stopping.
(8) 4-way valve control
1. The 4-way valve control under the modes of Cooling, dehumidification and fan: closing;
2. When the unit is on in heating mode, the 4-way valve is energized;
3. When the unit is on in heating mode and heating mode shift to other modes, the 4-way valve will be de-energized after compressor stops for 2min;
4. After protection stops, the 4-way valve will be de-energized after 4min;
5. Start to defrost: The power of 4-way valve will be de-energized after the compressor stops;
6. Defrosting finish: The 4-way valve will be energized after the compressor stops.
(9) Anti-freezing protection
1. In cooling and dry mode, if Tindoor pipe
˘
0 is detected for 3min continuously, the unit will stop; if
˘
Tindoor pipe, and compressor has stopped for
3min, the unit will resume running;
2. In cooling and dry mode, if Tindoor pipe
˘
6, running frequency of compressor will be decreased or stop to increase will be occurred;
3. If the unit stops as anti-freezing protection for 6 times, it can not resume running automatically and display malfunction, it can resume by pressing
ON/OFF. During operation, if the time exceeds compressor running time, the time of anti-freezing protection stop will zero clearing. When the unit is off/
fan/ heating mode, the malfunction and malfunction times will zero clearing. (If the malfunction can not resume, the shifting mode can clear malfunction.)
(10) Overload protection
1. In cooling and dry mode: if
Toutdoor pipe, the unit will stop; if Toutdoor pipe
˘
, and compressor has stopped for 3min, the unit will resume running;
2. In cooling and dry mode: if
Toutdoor pipe, running frequency of compressor will be decreased or stop to increase will be occurred;
3. In heating mode: if
Tindoor pipe, the unit will stop; if Tindoor pipe
˘
, and compressor has stopped for 3min, the unit will resume running;
4. In cooling and dry mode: if
Tindoor pipe, running frequency of compressor will be decreased or stop to increase will be occurred;
5. If the unit stops as overload protection for 6 times, it can not resume running automatically and display malfunction, it can resume by pressing ON/OFF.
During operation, if the time exceeds compressor running time, the time of overload protection stop will zero clearing. When the unit is off/ fan/ shifts to
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