32
Technical Information
Service Manual
IDU fan motor will blow residual heat after operating at set
speed for a period of time consecutively to make sure the inner
temperature of air conditioner won’t be too high.
In heating mode, 4-way valve is energized. Temperature setting
range is 16 ~ 30°C.
10S
10S
T
preset
+1
T
preset
-1
Stop heating
Original operating status
Start heating
valve
Outdoor unit
Intdoor unit
Compressor
min.
min.
min.
T
amb
.
.nim.nim
Set fan speedSet fan speed
②
Defrosting condition and process
In order to ensure heating effect, the unit will proceed defrosting
automatically according to the frost situation of outdoor unit.
Dual-8 nixie tube displays H1 during defrosting. (For some
models, heating icon is bright for a period of time and then OFF).
③
Protection functions (See function protection of this section)
(5) Fan mode
①
Operation condition and process
The IDU fan motor operates at set speed, while the compressor,
the ODU fan motor and 4-way valve stop.
②
Protection functions (See function protection of this section)
3 Other control function introductions
(1) Swing function (the unit is with up&down swing and
left&right swing)
a. Up&down swing control
①
After energization, swing motor will rstly have the horizontal
louver rotate anticlockwise to position O to close air outlet.
If swing function has not been set after start-up of the unit,
horizontal louver will turn clockwise to position D in heating
mode, or turn clockwise to position L in other modes.
②
If swing function is set when turning on the unit, the horizontal
louver will swing between L and D.
Horizontal louver has 7 swing statuses:
◆
Stay at position L: control by remote controller:
◆
Stay at position A: control by remote controller:
◆
Stay at position B: control by remote controller:
◆
Stay at position C: control by remote controller:
◆
Stay at position D: control by remote controller:
◆
Swing between L and D: control by remote controller:
，
，
，
◆
Stop at any position between L and D (angles between L and
D are equiangular), control by remote controller: OFF
L
Set this position as starting point 0
（
0°
）
③
When turning off the unit, horizontal louver will close at
position O.
④
Swing action is valid only when swing command has been set
and the IDU fan motor is operating.
b. Left&right swing control
①
After energization, swing motor will firstly have the vertical
louver rotate anticlockwise to position O to close air outlet. If
swing function has not been set after start-up of the unit, vertical
louver will turn clockwise to position D in heating mode, or turn
clockwise to position L in other modes.
②
If swing function is set when turning on the unit, the vertical
louver will swing between L and D.
Vertical louver has 7 swing statuses:
◆
Stay at position L: control by remote controller
◆
Stay at position A: control by remote controller
◆
Stay at position B: control by remote controller
◆
Stay at position C: control by remote controller
◆
Stay at position D: control by remote controller
◆
Swing between L and D: control by remote controller
，
， ，
◆
Stop at any position between L and D (angles between L and
D are equiangular), control by remote controller: OFF
C
D
Set this position as starting point 0
（
0°
）
③
When turning off the unit, vertical louver will close at position
O.
④
Swing action is valid only when swing command has been set
and the IDU fan motor is operating.
(2) Sleep function
◆
If start up sleep function under cooling or drying mode, the
6. Function and Control
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