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Technical Information
Service Manual
6.2 Brief Description of Modes and Functions
Indoor Part
Temperature Parameter
◆
Room setting temperature (Tpreset)
◆
Room ambient temperature (Tamb.) (temperature sensor :15K, partial pressure resistance:15K)
◆
Surface temperature of copper pipe for indoor heat exchanger (Tindoor tube) (temperature sensor: 20K, partial pressure resistance:
20K)
1. Basic Functions of System
(1) Cooling Mode
①
In this mode, indoor fan and swing will operate according to the setting status. The temperature setting range is 16~30°C.
②
When the unit stop operation due to malfunction of outdoor unit or protection, indoor unit will keep original operating status.
Malfunction code will be displayed.
③
When 0≤(Tpreset-Tamb.), if the indoor unit is operating at high fan speed, the speed of fan will change to medium fan speed; if the
indoor unit is operating at medium or
low fan speed, the speed of fan will keep the same; (This condition can only be carried out after the compressor is started up);
Theres no change for super-high fan speed; when (Tamb.-Tpreset)≥1°C, the fan speed will resume setting fan speed;
(2) Dry Mode
①
In this mode, fan will operate at low fan speed and swing will operate at setting status. The temperature setting range is 16~30°C.
2. When the unit stop operation due to malfunction of outdoor unit or protection, indoor unit will keep original operating status.
Malfunction code will be displayed.
(3) Fan Mode
①
In this mode, indoor fan will operate at high, medium, low or auto fan speed. Compressor, indoor fan and the four-way valve will all
stop operation.
②
In this mode, the temperature setting range is 16~30°C.
(4) Heating Mode
①
In this mode, the temperature setting range is 16~30°C.
②
Working condition and process of heating: when the unit is turned on in heating mode, indoor unit enters into anti-cold air condition;
when the unit is tuned off, the unit will enter into the condition of blowing residual heat.
③
Protection function: in heating mode, when the compressor is stopped due to malfunction, indoor fan will operate at the condition of
blowing residual heat.
④
Defrosting control: after receiving the defrosting signal from outdoor unit, heating indicator on indoor unit OFF 0.5s and ON 10s.
⑤
Anti-cold function
⑥
Blowing residual heat function;
a) During heating operation, when the stopping condition for the compressor is reached, the compressor and the outdoor fan motor
stop operation. The upper& down horizontal louver will rotate to the horizontal position L. The indoor fan will be stopped after operating
for 60s at setting speed.
b) Due to the blockage of PG motor, horizontal louver will keep the stop position when the unit is turned off. (In other modes) When the
unit is stopped due to other malfunctions,up&down horizontal louver will rotate to horizontal position L. The indoor fan will be stopped
after operating for 60s at setting speed.
c) If the unit is turned off when the compressor is operating in heating mode or auto heating mode, up&down horizontal louver will rotate
to horizontal position L. The indoor fan will be stopped after operating for 60s at setting speed.
(5) Auto Mode
①
When Tamb.≥26°C, the unit will operate in cooling mode. The implied setting temperature is 25°C.
②
Heat pump type: when Tamb.≤22°C, the unit will operate in heating mode. The implied setting temperature is 20°C.
③
Cooling only unit: when Tamb.≤25°C, the unit will operate in auto mode. The implied setting temperature is 25°C.
④
When 23°C≤Tindoor amb. ≤25°C, the unit will operate in auto fan mode if the unit is turned on and enters into the auto mode for the
first time. If the unit is switched to auto mode from other mode, it will keep the previous operation mode (if the unit is switched to auto
mode from dry mode, the unit will operate at auto fan mode).
2. Display Status of Indoor Indicator
(NOTE:Nixie tube is not available for A8 panel.)
(1) Status of Indoor Display Board
①
After energization, all the icons will be displayed and then only the power indicator is bright. When the unit is turned on by remote
controller, the operation indicator will be bright. Meanwhile, the current setting operation mode will be displayed.
②
During defrosting, heating indicator on indoor unit OFF 0.5s and ON 10s.
③
“Dual-8” displays setting temperature.
●
Display of operation icon and mode icon
After energization, all the icons will be displayed for once. In standby status, the operation indicator will be in red. If turn on the unit by
remote controller, the operating indication icon will be bright. Meanwhile, the current setting operation mode will be displayed (mode
indicator: cooling indicator, heating indicator, dry indicator). If turn off the light button, all displays will be turned off.
●
Temperature display control mode for split type unit
①
When user set the remote controller as the setting temperature display status, the current setting temperature will be displayed on
