Lennox LNINVE052 Service Manual page 28

Service Manual
Graphic instruction:
(Same as below)
② The indoor unit displays operation icon, cooling icon and set temperature.
③ Protection functions (See function protection of this section)
(3) Dry Mode
① Dry conditions and process
◆ When Tamb. ≥Tset-0.5℃ , the unit starts drying and cooling. In this case, the compressor and the ODU fan motor run, and the IDU fan
motor runs at low speed.
◆ When Tamb. ≤Tset-2℃ , the compressor and the ODU fan motor stop after a few seconds, while the IDU fan motor runs at low speed.
◆ When Tset-2℃＜ Tamb. ＜ Tset-0.5℃ , the unit will maintain its present operation status.
◆ When the unit stops due to malfunction or protection, the indoor unit maintains its present operation status and displays malfunction
code.
In this mode, the 4-way valve is de-energized (cooling only unit is without 4-way valve). Temperature setting range is 16 ～ 30℃ .
② The indoor unit displays operation icon, dry icon and set temperature.
③ Protection functions (See function protection of this section)
(4) Fan mode
① Fan conditions and process
In this mode, IDU fan motor runs at set speed while the compressor and ODU fan motor stop operation. The 4-way valve is de-energized
(cooling only unit is without 4-way valve). Temperature setting range is 16 ～ 30℃ .
② The indoor unit displays operation icon and set temperature.
③ Protection functions (See function protection of this section)
(5) Heating mode (not available for cooling only type)
① Heating conditions and process
◆ When Tamb.≤Tset+3.5℃ , the unit starts heating operation. In this case, the 4-way valve, compressor and ODU fan motor run
simultaneously; the IDU fan motor runs after a while to prevent blowing out cold air.
◆ When Tamb. ≥Tset+5℃ , the compressor and ODU fan motor stop after a few seconds; the 4-way valve remains energized; the IDU
Technical Information
Tpreset -0.5 ˚C
Tpreset –2 ˚C
Compressor
Indicates operation
Outdoor fan motor
Indicates stop
Indoor fan motor
Tamb.
Tpreset -0.5 ˚C
Tpreset –2 ˚C
Compressor
Outdoor fan motor
Indoor fan motor
Tamb.
7 min. 3 min.
Set fan speed
7 min. 3 min. 7 min.
Low speed
Start cooling
Original operating status
Stop cooling
7 min.
Start Drying
Original operating status
Stop Drying
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