28
Technical Information
Service Manual
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
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 rstly 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
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.
L
Set this position as starting point 0
（
0
O
）
D
Set this position as starting point 0
（
0
O
）
fan motor operates at low speed.
◆
When Tamb.
＜
Tset-2
℃
, the compressor and the ODU fan
motor stop, while the IDU fan motor runs at low speed.
In drying mode, the 4-way valve is de-energized (4-way valve is
not available for cooling only unit); Temperature setting range is
16
～
30
℃
. Fan speed can’t be adjusted.
②
Protection functions (See function protection of this section)
(4)Heating mode(heating mode is not available for cooling
only uni)
①
Operation condition and process
◆
When Tamb.≤Tset-1
℃
, the system starts heating operation. In
this case, the 4-way valve is energized. The compressor and the
ODU fan motor operates simultaneously; The IDU fan motor will be
started up after delayed for a period of time to make sure the air
conditioner won’t blow out cold wind.
◆
When Tpreset-1
℃＜
Tamb.
＜
Tpreset+1
℃
, the system keeps
previous operation status.
◆
When Tamb.≥Tpreset+1
℃
, the compressor and the ODU fan
motor stop. The 4-way valve is energized all the time. The 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
℃
.
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
Defrosting condition and process
In order to ensure heating effect, the unit will proceed defrosting
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