Brief Description Of Modes And Functions - Lennox LM036CI-100P232-1X Service Manual

6.2 Brief Description of Modes and Functions

1Temperature Parameters
Indoor preset temperature (Tpreset)
Indoor ambient temperature (Tamb.)
2 Basic Functions
between them is Tf=TcX1.8+32.)
Once the unit is energized, the compressor shall never be restarted except 3mins interval at least. For the first energization,
if the unit is at off status before power failure, the compressor can be restarted without 3-min delay. But if the unit is at on
status before power failure, the compressor shall be restarted with 3mins delay. Once the compressor is started up, the
compressor won't stop running within 6mins with the change of room temperature.
(1) Cooling mode
Cooling conditions and process
When Tamb. ≥Tprese+1 , the unit starts cooling operation. In this case, the compressor and the outdoor fan operate and
the indoor fan operates at set speed.
When Tamb. ≤Tpreset-1 , the compressor and the outdoor fan stop while the indoor fan operated at set speed.
When Tpreset-1
In this mode, the four-way valve is de-energizing. The temperature setting range is 16 30
operation icon, cooling icon and set temperature.
Protection Functions
Antifreezing protection
If the system is under antifreezing protection, the compressor and the outdoor fan stops operation, and the indoor fan
operates at setting speed. If antifreezing protection is eliminated and the compressor has been stopped for 3 minutes, the
unit will resume its previous operation status.
Overcurrent Protection
If the system current exceeds the specified value in 3 successive seconds, except indoor fan, the complete unit will stop
operation. After 3 minutes, if the overcurrent is eliminated, the complete unit will resume previous operation.
If overcurrent protection occurs for 6 successive times (if the compressor operates for 6 minutes continuously, the
protective times will be cleared.), except indoor fan, the complete unit will stop operation. In this case, you should turn off
the unit by remote controller and then restart it. During overcurrent protection, the nixie tube displays error code "E5", and
operation indicator lamp blinks (OFF 3 seconds and blinks 5 times).
(2) Dry Mode
Dry Conditions and Process
18
(The temperature in this manual is expressed by Centigrade. If Fahrenheit is used, the switchover
Tamb. Tpreset+1 , the unit will maintain its previous operation status.
Tamb.
Tpreset +1 ˚C
Tpreset –1 ˚C
Compressor
Outdoor fan
Indoor fan
Compressor
Outdoor fan
Indoor fan
≥ 6 min. ≥ 3 min. ≥ 6 min.
Setting fan speed
Run
During antifreeze protection
min
Preset speed
Run
and the indoor unit displays
Start cooling
Original operating status
Stop cooling
Stop
Stop
Service Manual
Technical Information