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SEQUENCE OF OPERATION
PAGE 25
ENGLISH
Anti-Freeze Protection of the Indoor Coil
The temperature sensed by the coil sensor is used to deter-
mine at what speed the compressor is to run to avoid the coil
temperature being too cold.
Tpg_indoor: indoor unit pipe sensor temperature
When the outdoor ambient temperature is greater than 12°C,
Ts: outdoor unit Suction Line sensor temperature
• When Min(Tpg_indoor, Tpg_indoor+Ts)/2) < Tpg1, the
frequency of the compressor decreases at the rate of
1HZ/1 second.
• When Min(Tpg_indoor, Tpg_indoor+Ts)/2) < Tpg2, the
frequency of the compressor decreases at the rate of
1HZ/10 second.
• When Tpg_indoor begins to rise again, and Tpg2 ≤
Min(Tpg_indoor, Tpg_indoor+Ts)/2)≤ Tpg3, the frequency
of the compressor does not change.
• When Tpg3 < Min(Tpg_indoor, Tpg_indoor+Ts)/2) <Tpg4,
the frequency of the compressor increases at the rate of
1HZ/10 second.
Example: if Min(Tpg_indoor, Tpg_indoor+Ts)/2) ≤ 32°F
sustains for 2 minutes, the outdoor unit will stop and
indicate an underload malfunction code at the outdoor unit.
The compressor stops for a minimum of 3 minutes. When
Min(Tpg_ indoor , Tpg_indoor+Ts)/2)>Tpg4, the compressor
will restart.
When the outdoor ambient temperature is less than 12°C,
Ts: outdoor unit Suction Line sensor temperature
• When Min(Tpg_indoor) < Tpg1, the frequency of the
compressor decreases at the rate of 1HZ/1 second.
• When Min(Tpg_indoor) < Tpg2, the frequency of the
compressor decreases at the rate of 1HZ/10 second.
• When Tpg_indoor begins to rise again, and Tpg2 ≤
Min(Tpg_ indoor)≤ Tpg3, the frequency of the compressor
does not change.
• When Tpg3 < Min(Tpg_indoor) <Tpg4, the frequency of the
compressor increases at the rate of 1HZ/10 second.
Example: if Min(Tpg_indoor) ≤ 32°F sustains for 2 minutes, the
outdoor unit will stop and indicate an underload malfunction
code at the outdoor unit. The compressor stops for a
minimum of 3 minutes. When Min(Tpg_indoor >Tpg4, the
compressor will restart.
59°F // ice_temp_3+5
46°F // ice_temp_3+2
43°F
Decreasing slowly
Decreasing rapidly ice_temp_1
Stop
Keeping the frequency
Increasing slowly
32°F
37°F
41°F
43°F
48°F
Special Functions
Auto Restart
When this is enabled, the following functions will automatically
resumes after a power loss:
• ON/OFF State, Mode of Operation, Fan Speed,
Temperature Setpoint, Louver Swing settings.
• If there was a timer set or the system was in Sleep mode,
they will be canceled upon restart
Wired Controller:
• Auto Restart is Enabled by Default Wireless Controller:
• Enable: Press the Sleep button 10 times within 7 seconds.
You will hear 4 beeps as conrmation.
• Disable: Press the Sleep button 10 times within 7 seconds.
You will hear 2 beeps as conrmation.
Timed Defrost
Timed Defrost via Remote Controller (YR-HG)
(Same as dip switch 1 and 2 OFF):
Setting method:
1. Set to HEAT Mode.
2. Set to 30°C/86°F.
3. Set High Fan Speed.
4. Press Temperature + Button 10 times within 7 seconds.
5. Hear Unit will Beep 7 times to Conrm.
Cancel method:
Same process as Setting Method. Hear Unit Beep 5 times to
conrm of cancel function.
Demand Defrost
Force defrost via Remote Controller (YR-HG):
Setting method:
1. Set to HEAT Mode.
2. Set to 30°C/86°F.
3. Set High Fan Speed.
4. Press Health Button 10 times within 5 seconds.
5. Hear Unit will Beep 4 times to Conrm, System will enter
Force Defrost mode.
Indoor Temperature Display
This function will allow you to set the display to show either
the Ambient temperature or the setpoint.
Set temperature: Press the Light button 10 times within 5
second,Hear Unit will Beep 4 times to conrm.
Ambient temperature: Press the Light button 10 times within
5 second, Hear Unit will Beep 2 times to conrm.
Temperature Compensation
This function allows you the capability to adjust the tempera-
ture compensation oset of any indoor unit. The adjusted
value is programmed into the EEPROM.
Logic: The Actual Ambient Temperature = The Display Ambi-
ent Temperature + Temperature Compensation.
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