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Basic Functions - 9K & 12K 230 volt
◆ Indoor preset temperature (Tpreset)
◆ Indoor ambient temperature (Tamb.)
2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
functionis available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a3-minute lag; if the compressor is in operation before de-energization, the compressor will be started
with a 3-minute lag; and oncestarted, the compressor will not be stopped within 6 minutes regardless of changes in room
temperature;
(1) Cooling Mode
1. Working conditions and process of cooling
When Tamb.≥Tpreset, the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the com-
pressor will workand the indoor fan will run at preset speed.
When Tamb.=Tpreset-3.6°F, the compressor will run in 15Hz for continuous 15 minutes; if Tamb.=Tpreset-3.6°F is not
changed after that, the compressor will stop to run;
When Tamb.≤Tpreset-5.4°F, the compressor will stop to run, the outdoor fan motor will stop to run after 30 seconds and
the indoor fan motor will run at set fan speed;
When Tpreset-3.6°F < Tamb.< Tpreset, the unit will keep the previous running status.
Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 61 to 86°F.
If the compressor is shut down for some reason, the indoor fan and the swing device will operate at original state.
2. Protection
◆ Antifreeze protection
Under cooling and dehumidifying mode, 6 minutes after the compressor is started:
If T evap≤35.6°F, the compressor will operate at reduced frequency.
If T evap≤30.2°F is detected for durative 3 minutes, the compressor will stop, and after 30 seconds, the outdoor fan will
stop; and under cooling mode, the indoor fan and the swing motor will remain at the original state.
If T evap. ≥50°F and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original
operation state.
◆ Total current up and frequency down protection
When total current Itotal≤6A, increase frequency is allowed; when total current Itotal≥7A, increasing frequency is prohib-
ited; when total current Itotal≥8A, the unit operates by decreasing frequency. When total current Itotal≥9A, the compres-
sor stops operation, and indoor fan will stop operation after 30s.
(2) Dehumidifying Mode
1. Working conditions and process of dehumidifying
If Tamb>Tpreset, the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan
will operate
and the indoor fan will run at low speed.
If Tpreset -3.6°F≤Tamb≤Tpreset, the compressor remains at its original operation state.
If Tamb.< Tpreset -3.6°F, the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
operate at
low speed.
2. Protection
Protection is the same as that under the cooling mode.
(3) Heating Mode
1. Working conditions and process of heating
1. If Tpreset-(Tindoor ambient- Tcompensatory) ≥1.8°F, the unit enters heating mode, in which case the compressor, the
outdoor fan and the 4-way valve will operate simultaneously;
2. If -3.6°F<Tpreset-(Tindoor ambient- Tcompensatory) <1.8°F, the unit will maintain its original operating status.
Product Introduction
