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1.2 Brief Description of Modes and Functions
Service Manual
1. Temperature Parameters
Indoor Preset Temperature (PRESET)
6.2 Brief Description of Modes and Functions
Indoor ambient temperature (AM)
1. emperature Parameters
2. Basic Functions
Once energized in no case should the compressor be restarted within 3 minutes of start. In the situation that
Indoor preset temperature (
memry function is available for the first energization and the compressor is at a stop before de-energization the
Indoor am ient temperature (
compressor can be restarted without waiting 3 minutes. If the compressor is in operation before de-energization
2. Basic Functions
the compressor will start after 3 minutes. Once started the compressor will should not be stopped for 6 minutes
Once energi ed in no case should the compressor e restarted within less than 3 minutes. In the situation that memory function
regarless of changes in room temperature.
is a aila le for the first energi ation if the compressor is at stop efore de-energi ation the compressor will e started w ithout
a 3-minute lag if the compressor is in operation efore de-energi ation the compressor will e started with a 3-minute lag and
3. Cooling Mode
once started the compressor will not e stopped within 6 minutes regardless of changes in room temperature
Working conditions and process of cooling.
(1) Cooling
ode
When in AM/PRESET the unit will enter cooling operation in which case the indoor fan, outdoor fan, and com-
Wor ing conditions and process of cooling
①
pressor will start and the indoor fan will run at preset speed.
When
the unit will enter cooling operation in which case the indoor fan the outdoor fan and the compressor will
When in AM/PRESET -3.6F the compressor will stop and the outdoor fan will stop after 60 s. The indoor fan will
am
preset
wor and the indoor fan will run at preset speed.
run at the preset speed.
When
-3.6
When PRESET -3.6F AM/PRESET 1.8F the unit will remain at its precious state.
am
preset
at preset speed.
Under this mode the four-way valve will be de-energized and the temperature set within a range of 61-86F.
When
-3.6
F
If the compressor is shut down for some reason the indoor fan and the swing device will operate at original
preset
nder this mode the four-way al e will e de-energi ed and temperature can e set within a range from 61 to 86
state.
If the compressor is shut down for some reason the indoor fan and the swing de ice will operate at original state.
4. Protection
Protection
②
Antifreeze Protection
ntifree e protection
Cooling and dehumidifying mode will start 6 minutes after the compressor starts.
nder cooling and dehumidifying mode 6 minutes after the compressor is started:
-If evap is at 35.6F the compressor will operate at reduced frequency.
If
35.6
F
the compressor will operate at reduced fre uency.
e ap
-If evap is at 30.2 F for 3 minutes the compressor will stop and 1 minute after the outdoor fan will stop. Under
If
30.2
F
is detected for durati e 3 minutes the compressor will stop and after 60 seconds the outdoor fan will stop
e ap
cooling mode the indoor fan and swing motor will remain at the original state.
and under cooling mode the indoor fan and the swing motor will remain at the original state.
-If evap is at 42.8 F and the compressor has remained off for at least 3 minutes, the compressor will resume it's
F
If
42.8
and the compressor has remained at OFF for at least 3 minutes the compressor will resume its original
e ap.
original operation state.
operation state.
Total Current up and frequency down protection
otal current up and fre uency down protection
-If Itotal 16 a frequency rise will occur. If Itotal is over 17 a frequency rise will not occur. If Itotal is over 18 the
If I
16
fre uency rise will e allowed if I
total
compressor will run at reduced frequency and if the Itotal is over 20 the compressor will stop and the outdoor
run at reduced fre uency and if I
fan will stop with a time lag of 60s.
(2) Dehumidifying
ode
Wor ing conditions and process of dehumidifying
①
5. Dehumidifying Mode
If
1.8
F
the unit will enter cooling and dehumidifying mode in which case the compressor and the outdoor fan will
Working conditions and process of dehumidifying
am
preset
operate and the indoor fan will run at low speed.
-If AM/PRESET 1.8F the unit will enter cooling and dehumidifying mode in which case the compressor and the
F
If
-3.6
outdoor fan will operate and the indoor fan will run at low speed.
preset
am
If
.
-3.6
F
If PRESET -3.6 F AM /PRESET 1.8 F the compressor remains at its original operation state.
am
preset
If AM/PRESET -3.6F the compressor will stop the outdoor fan will stop with a time lag of 60s and the indoor fan
operate at low speed.
will operate at low speed.
)
preset
.)
am
F
the compressor will stop the outdoor fan will stop with a time lag of 60s and the indoor fan will run
1.8
the unit will remain at its pre ious state.
F
am .
preset
am .
preset
3.6
F
preset
6 minutes
Compresso r
Outdoor fan
Indoor fan
un
17
total
20
the compressor will stop and the outdoor fan will stop with a time lag of 60s.
total
1.8 F the compressor remains at its original operation state.
preset
the compressor will stop the outdoor fan will stop with a time lag of 60s and the indoor fan will
Start cooling
Original wor ing state
Stop cooling
3 minutes
6 minutes
Preset fan s pee d
Stop
fre uency rise will not e allowed if I
F
18
the compressor will
total
5
21