Lennox LNINVE052 Service Manual page 35

Service Manual
(8)I feel control mode
After controller received I feel control signal and ambient temperature sent by remote controller, controller will work according to the ambient
temperature sent by remote controller.
(9) Compulsory defrosting function
(1) Start up compulsory defrosting function
Under ON status, set heating mode with remote controller and adjust the temperature to 16 ℃ . Press "+, -, +, -, +,-" button successively
within 5s and the complete unit will enter into compulsory defrosting status. Meanwhile, heating indicator on indoor unit will ON 10s and OFF
0.5s successively. (Note: If complete unit has malfunction or stops operation due to protection, compulsory defrosting function can be started
up after malfunction or protection is resumed.
(2) Exit compulsory defrosting mode
After compulsory defrosting is started up, the complete unit will exit defrosting operation according to the actual defrosting result, and the
complete unit will resume normal heating operation.
(10) Refrigerant recycling function (applicable when changing installation location or in maintenance)
(1) Enter refrigerant recycling function
Within 5min after energizing (unit ON or OFF status is ok), continuously press LIGHT button for 3 times within 3s to enter refrigerant
recycling mode; Fo is displayed and refrigerant recycling function is started. At this moment, the maintenance people closes liquid valve.
After 5min, stick the thimble of maintenance valve with a tool. If there is no refrigerant spraying out, close the gas valve immediately and
then turn off the unit to remove the connection pipe.
(2) Exit refrigerant recycling function
After entering refrigerant recycling mode, when receive any remote control signal or enter refrigerant recycling mode for 25min, the unit will
exit refrigerant recycling mode automatically. If the unit is in standby mode before refrigerant recycling, it will be still in standby mode after
finishing refrigerant recycling; if the unit is in ON status before refrigerant recycling, it will still run in original operation mode.
(11)Ambient temperature display control mode
1. When user set the remote controller to display set temperature (corresponding remote control code: 01), current set temperature will be
displayed.
2. Only when remote control signal is switched to indoor ambient temperature display status (corresponding remote control code: 10) from
other display status (corresponding remote control code: 00, 01,11),controller will display indoor ambient temperature for 3s and then turn
back to display set temperature.
Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube stop operation.
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Indoor fan can select to operate at high, medium, low or auto fan speed. Temperature setting range is 16~30 C.
(12)Off-peak energization function:
Adjust compressor's minimum stop time. The original minimum stop time is 180s and then we change to:
The time interval between two start-ups of compressor can't be less than 180+T s(0≤T≤15). T is the variable of controller. That's to say
the minimum stop time of compressor is 180s~195s. Read-in T into memory chip when refurbish the memory chip each time. After power
recovery, compressor can only be started up after 180+T s at least.
(13) Customized compensation requirement for display:
1. Except dual 8 nixie tube, all mode indicators on display icon change to "timer, turbo, sleep, swing, I feel". When setting function by remote
controller, corresponding icon will be displayed (swing indicator can be displayed only when setting complete swing).
2.All icons are display for 3s after energization;
3.Under fan mode, dual-8 nixie tube is displayed circularly as below:
4.Others are same as original display description.
5.Controller only displays set temperature.
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6.It defaulted to display 20 C(heating) or 25 C(cooling) after energization by auto button.
(14) SE control mode
The unit operates at SE status.
Technical Information
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