Pcb Function Manual And Operation Method - York EVHC 09 DSAAAR Service Manual

PCB function manual and operation method

PCB function manual and operation method
1. Temperature Parameters
Indoor preset temperature (T
Indoor ambient temperature (T
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 . T , the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the compressor
amb preset
will work and the indoor fan will run at preset speed.
When T . T
amb preset
run at preset speed.
When T -2 < T
preset
Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 16 to 30 .
If the compressor is shut down for some reason, the indoor fan and the swing device will operate at original state.
Protection
Antifreeze protection
Under cooling and dehumidifying mode, 6 minutes after the compressor is started:
If T . 2 , the compressor will operate at reduced frequency.
evap
If T . -1 is detected for durative 3 minutes, the compressor will stop, and after 30 seconds, the outdoor fan will stop;
evap
and under cooling mode, the indoor fan and the swing motor will remain at the original state.
If T . 6 and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original
evap
operation state.
Total current up and frequency down protection
If I A, frequency rise will be allowed; if I
total
run at reduced frequency; and if I
(2) Dehumidifying Mode
Working conditions and process of dehumidifying
If T . T , the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will
amb preset
operate and the indoor fan will run at low speed.
If T -2 T . T
preset amb
If T .< T -2 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
amb preset
operate at low speed.
144
)
preset
)
amb.
-2 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
.< T +1 , the unit will remain at its previous state.
amb preset
T
amb
T
preset
-2
T
preset
6 minutes
Compressor
Outdoor fan
Indoor fan
Run
D, the compressor will stop and the outdoor fan will stop with a time lag of 30s.
total
, the compressor remains at its original operation state.
preset
3 minutes
6 minutes
Preset wind speed
Stop
B, frequency rise will not be allowed; ifI
total
Start cooling
Original working state
Stop cooling
C, the compressor will
total