PCB function manual and operation method
1. Temperature Parameters
u Indoor preset temperature (T
preset
)
u 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
ķ
Working conditions and process of cooling
When T
amb
.ıT
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
.İT
preset
-2ć, 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
-2ć< T
amb
.< T
preset
+1ć, the unit will remain at its previous state.
Ø Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 16 to 30ć.
If the compressor is shut down for some reason, the indoor fan and the swing device will operate at original state.
ĸ
Protection
u Antifreeze protection
Under cooling and dehumidifying mode, 6 minutes after the compressor is started:
If T
evap
.İ2ć, the compressor will operate at reduced frequency.
If T
evap
.İ-1ć 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
. ı6ć and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original
operation state.
u Total current up and frequency down protection
If I
total
İA, frequency rise will be allowed; if I
total
ıB, frequency rise will not be allowed; ifI
total
ıC, the compressor will
run at reduced frequency; and if I
total
ıD, the compressor will stop and the outdoor fan will stop with a time lag of 30s.
(2) Dehumidifying Mode
ķ
Working conditions and process of dehumidifying
If T
amb
.ηT
preset
, 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 T
preset
-2ćİT
amb
.İT
preset
, the compressor remains at its original operation state.
If T
amb
.< T
preset
-2ć, the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
operate at low speed.
To Next Page
Loading...
