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Service Manual
6.4 Brief Description of Modes and Functions
1. Cooling mode
(1) Under this mode, the fan and the up swing will operate at setting status. The temperature setting range is 16~30ºC.
(2) The unit is stopped because of malfunction of outdoor unit or protection. The indoor unit keeps original operation status and the
error code is displayed.
(3) Indoor unit is stopped due to mode shock.
2. Drying mode
(1) Under this mode, the fan operates at low speed and the swing operates at setting status. The temperature setting range is
16~30ºC.
(2) The unit is stopped because of malfunction of outdoor unit or protection. The indoor unit keeps original operation status and the
error code is displayed.
3. Heating mode
(1) Under this mode, the temperature setting range is 16~30ºC.
(2) Working condition and process for heating
When the unit is turned on under heating mode, the indoor unit turns to cold air prevention status. When the unit is turned off and the
indoor unit has been started up before, the indoor unit blows the residual heat.
(3) Protection function: When the compressor is stopped due to malfunction under heating mode, the indoor unit blows the
residual heat.
(4) Blow residual heat
When the unit stops operation as it reaches the temperature point, indoor unit will continue to run for 60s. The fan speed cant be
switched during blowing residual heat period. The upper horizontal louver will turn to the defaulted position in cooling. When the unit
operates under heating mode or auto heating mode, compressor will be turned on and the corresponding electric expansion valve is
more than 65 and the unit stops operation during the operation status of indoor unit. The upper horizontal louver will turn to the
defaulted position in heating mode. The indoor unit operates at low speed for 10s and then the unit stops operation.
(5) Defrosting, oil-returning
As it received the signal of defrosting and oil-returning from outdoor unit, the upper horizontal louver will turn to the minimum angle in
cooling. 10s later, the in door fan stop operation. During defrosting and oil-returning process and they are quitted within 5mins, all
malfunctions for indoor tube temperature sensor wont be detected.
4. Working process for AUTO mode (Mode judgment will be performed every 30s)
Under AUTO mode, standard cooling Tpreset=25ºC (77ºF), standard heating Tpreset=20ºC (68ºF), and standard fan Tpreset= 25ºC
(77ºF).
(1) When Tamb≥26ºC (79ºF), the unit operation in cooling mode;
(2) Heating pump unit: When Tamb≤19ºC (66ºF), the unit operates in heating mode;
(3) Cooling only unit: Tamb≤19ºC (66ºF), the unit operates in fanmode;
(4) When 19ºC<Tindoor amb.<26ºC, if it turns to auto mode as the unit is turned on for the first time the unit will operates at auto fan
mode. If it switch to auto mode from other modes, the unit will keep previous operation mode (when it turns to dry mode, the unit
operates at auto fan mode).
(5) Protection function
Protection function is the same as that in cooling or heating mode.
5. Fan mode
Under fan mode, only indoor fan and swing operates. When it operates at auto fan speed, it will operate according to auto fan speed
condition in cooling.
6. Mode shock
If the mode shock is 1 which is received by indoor unit from outdoor unit, the loads of indoor unit (indoor unit, auxiliary heating,swing)
stop operation and the error code is displayed. The mode sent to outdoor unit is still remote control receiving mode. The unit will be
turned off during mode shock.
If timer ON is reached, and the mode shock is 1 which is received by indoor unit from outdoor unit, the loads of indoor unit (indoor
unit,auxiliary heating, swing) stop operation and the error code is displayed. The mode sent to outdoor unit is still remote control receiving
mode.
7. Other control
7.1 Buzzer
Upon energization or availably operating the unit or remote controller, the buzzer will give out a beep.
7.2 Auto button
If this button is pressed, the unit will operate in AUTO mode and indoor fan will operate at auto speed; meanwhile, the swing motor
operates. Press this button again to turn off the unit.
7.3 8 ºC heating function
Under heating mode, press TEMP+CLOCK buttons simultaneously. Under this mode, "cold air prevention protection" will be shielded.
Technical Information
41
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