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①When Tpreset-(Tindoor amb.-Tcompensation)≥33.8 , the unit will enter heating operation. In that case, compressor, outdoor fan
and 4-way valve will operate at the same time.
②When 28.4 ＜Tpreset-（Tindoor amb.-Tcompensation）＜33.8 , the unit will keep its previous operation status.
③When Tpreset-(Tindoor amb.-Tcompensation)≤28.4 , compressor will stop operation and in 30s later, the outdoor will stop
operation;
④When the unit is turned off at heating mode, or changes to other mode from heating mode, the 4-way valve will be de-energized in
2 minutes later after compressor stops operation (the compressor is operating during heating mode.)
⑤When Toutdoor amb. ＞86 , compressor will stop operation immediately and outdoor fan will stop operation in 30s later.
⑥When the compressor is operation, or changing to heating from cooling or drying mode, the 4-way valve will be energized in 2-3
minutes later.
Note: Tcompensation is determined by indoor and outdoor units. If indoor unit controls temperature compensation, T compensation
is determined by the value sent to outdoor unit by indoor unit; If it doesn’t controlled by indoor unit, Tcompensation will be 37.4 as
default.
15Hz）for 17 minutes, if Tindoor amb.=Tpreset-35.6 , the compressor will stop operation;
1. Temperature Parameters
ƹ
Indoor preset temperature (Tpreset)
ƹ
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 function
3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with a 3-minute lag; and once
started, the compressor will not be stopped within 6 minutes regardless of changes in room temperature;
(1) Cooling Mode
ƹ
Working conditions and process of cooling
Protection
ƹ
Antifreeze protection
Under cooling and dehumidifying mode, 6 minutes after the compressor is started:
If T evap≤35.6
o
F, the compressor will operate at reduced frequency.
o
F
o
F
o
F
o
F
If T evap≤30.2
o
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
o
Fand the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original operation
state.
ƹ
Total current up and frequency down protection
When total current I
total
≤6A, increase frequency is allowed; when total current I
total
≥7A, increasing frequency is prohibited; when total
current I
total
≥8A, the unit operates by decreasing frequency. When total current I
total
≥9A, the compressor stops operation, and indoor
fan will stop operation after 30s.
(2) Dehumidifying Mode
ķ
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 -35.6
o
F≤Tamb≤Tpreset, the compressor remains at its original operation state.
If Tamb.< Tpreset -35.6
o
F, the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will operate at
o
F
o
F
o
F
o
F
o
F
o
F
low speed.
ĸ
Protection
Protection is the same as that under the cooling mode.
(3) Heating Mode
Working conditions and process of heating
①When Tindoor amb.≥Tpreset, the unit will enter cooling operation. In that case, the outdoor fan and compressor will operate.
④When Tpreset-35.6 ＜Tindoor amb.＜Tpreset, the unit will keep its previous operation.
③When Tindoor amb.≤Tpreset-37.4 , compressor will stop operation and in 30s later, outdoor fan will stop operation;
②When Tindoor amb.=Tpreset-35.6 and compressor has continuously operated at frequency lower than 15Hz（not including
ƹ