Brief Description Of Modes And Functions - Sinclair SYMPHONY MS-H09AISW PT Service Manual

6.2 Brief Description of Modes and Functions

I. Basic Operation Mode
1. Cool; 2.Dry; 3.Heat; 4.Auto; 5.Fan
II. Basic Functions
1. Cooling Only
(1) Under cooling mode, fan and swing operate at setting status. Temperature setting range is 16~30℃ .
(2) During malfunction of outdoor unit or stop operation, indoor unit keeps original operation status. Dual-8 nixie tube display error
code.
(3) Indoor fan stops operation during mode shock.
2. Drying mode
(1) Under drying mode, fan operates at low speed and swing operates at setting status. Temperature setting range is 16~30℃ .
(2) During malfunction of outdoor unit or stop operation, indoor unit keeps original operation status. Dual-8 nixie tube display error
code.
(3) Protection status is same as that under cooling mode
3. Heating Mode
(1) Under heating mode, temperature setting range is 16~30℃ .
(2) Operation condition and process for heating mode
After turning on the unit under heating mode, indoor unit operates according to cold air prevention condition;
During heating process, after room temperature is increased to set temperature，the complete unit stops operation. Indoor fan will
blow residual heat and delay 1min to stop operation.
During heating operation, after turning off the unit by remote controller, indoor fan will blow residual heat to delay 10s to stop operation.
(3) Protection Function.
When compressor stops operation due to malfunction (include malfunction of temperature sensor) during heating mode, indoor fan will
blow residual heat to delay 1min to stop operation.
(4) Defrosting and Oil Retrun
After receiving oil-return signal of heating from outdoor unit, heating indicator is ON 10s and OFF 0.5; When received defrosting signal
from outdoor unit, defrosting indicator is ON.
4. Auto mode
(1) Operation condition and process for auto mode
Under this mode, system will select operation mode (cooling, heating, fan) automatically according to the change of indoor ambient
temperature. There's 30s auto delay protection for mode switchover.
◆ When Tindoor amb. ≥26℃ , the system will operate under cooling mode; Ex-factory set temperature: Tpreset=25℃
◆ Heat pump unit: When Tindoor amb. ≤22℃ , the system operates under heating mode. Ex-factory set temperature: Tpreset=20℃
◆ Cooling only unit: When Tindoor amb. ≤22℃ , the system operates under fan mode. Ex-factory set temperature: Tpreset=25℃
◆ When 22℃＜ Tindoor amb. ＜ 26℃ : The unit will operate under fan mode when entering into auto mode after turning on the unit.
If switch to auto mode from cooling, heating or fan mode, the unit will keep original operation mode. If switch to auto mode from drying
mode, the unit will operate under fan mode.
(2) Display: operation icon, actual operation mode icon. Display set temperature, but it can't be adjusted.
(3) Protection function is same as that under other modes. (refer to the section of system function protection)
5. Fan Mode
Under fan mode, indoor fan operates at set fan speed, while compressor and outdoor fan stops operation. 4-way valve is de-energized
(4-way valve is not available for cooling only unit). Temperature setting range is 16 ～ 30℃ .
III. Other Control
1. Buzzer
Upon energization or pressing button (emergency switch on air conditioner) or receiving signal from remote controller, the buzzer will
give out a beep.
2. Auto button
When pressing this button under OFF status, the complete unit will operate under auto mode and indoor unit will operate at auto fan
speed. Swing mode will operate when indoor fan is operating.
Press this button under ON status to turn off the unit.
3. Auto fan
(1) Auto fan speed under heating mode
When Tindoor amb.≤Tpreset+1℃ , indoor fan will operate at high fan speed;
When Tpreset+1℃＜ Tindoor amb. ＜ Tpreset ＋ 3℃ , indoor fan operate at medium fan speed;
When Tindoor amb. ≥Tpreset ＋ 3℃ , indoor fan operates at low fan speed;
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