6.2 Description of Each Control Operation
Function and Control
1. Temperature Parameters
Indoor preset temperature (T
preset
)
Indoor ambient temperature (T
amb.
2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a 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
Working conditions and process of cooling
When T
amb
.≥ T
preset
, the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the compressor
will work and the indoor fan will run at preset speed.
When T
amb
.≤ T
preset
-28 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
run at preset speed.
When T
preset
-28 <T
amb
.< T
preset
+34 F
FF
F
F
, the unit will remain at its previous state.
Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 61 to 86
If the compressor is shut down for some reasons , the indoor fan and the swing device will operate at original state.
Protection
Antifreeze protection
Under cooling and dry mode, 6 minutes after the compressor is started:
If T
evap
.≤ 36 , the compressor will operate at reduced frequency.
If T
evap
.≤ -30 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
. ≥ 42 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
If I
total
≤ A, frequency rise will be allowed; if I
total
≥
B, frequency rise will not be allowed; ifI
total
≥ C, the compressor will
run at reduced frequency; and if I
total
≥ D, the compressor will stop and the outdoor fan will stop with a time lag of 30s.
(2) Dry Mode
Working conditions and process of dry
If T
amb
. T
preset
, the unit will enter cooling and dry mode, in which case the compressor and the outdoor fan will
operate and the indoor fan will run at low speed.
If T
preset
-28 T
amb
.≤ T
preset
, the compressor remains at its original operation state.
If T
amb
.< T
preset
-28 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
operate at low speed.
Start cooling
Stop cooling
Compressor
Original working state
Run
Stop
Outdoor fan
Indoor fan
T
preset
T
preset
-28
T
amb
Preset fan Speed
6 minutes
6 minutes
3 minutes
)
F
F
F
F
F
F
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