Lennox LM012CI-100V232-1X, Service Manual, Page: 23 / 61

20
Installation and Maintenance
Service Manual
(8) Dual-8 nixie tube display
◆
When the air conditioner is turned on for the first time, dual-8 nixie tube defaulted to display current set temperature.
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When controller receives signal of display set temperature, dual-8 nixie tube displays set temperature. When received remote control
signal is switched to indoor ambient temperature display status signal from other display status, dual-8 nixie tube will display indoor
ambient temperature for 3-5s, and then turn back to display set temperature. If remote control to set other status, the display keeps the
same.
◆
When air conditioner has a malfunction,dual-8 nixie tube will show relevant error code.
◆
When air conditioner is in auto defrosting, heating icon will be on and off.
◆
If turn off light button, all display will be turned off.
(9) Memory function
①
Power failure when turning on the unit
◆
Memory content: ON status, mode, up&down swing, light, set temperature, set fan speed, general timer, Fahrenheit/ Celsius
◆
General timer can be memorized. Time of timer is calculated again from energization.
◆
Clock timer can’t be memorized.
②
Power failure when turning off the unit
◆
Memory content: OFF status, mode, up&down swing, light, set temperature, set fan speed, general timer, Fahrenheit/ Celsius
◆
General timer can be memorized. Time of timer is calculated again from energization.
◆
Clock tim er can’t be memorized.
4. Special Function
(1) Health function (for the model with health function)
During operation of the IDU fan motor, press health button on the remote controller to start health function (If there is not health button on
the remote controller, the unit defaults health function ON).
(2) I Feel function (for all models, but it needs the remote controller which can set this function)
When I FEEL command is received, the controller will operate according to the ambient temperature sent by the remote controller (For
defrosting and cold air prevention, the unit operates according to the ambient temperature sensed by the air conditioner). The remote
controller will regularly send ambient temperature data to the controller. When the data has not been received for a long time, the unit
will operate according to the temperature sensed by the air conditioner. If I FEEL function is not set, the ambient temperature will be that
sensed by the air conditioner.
F1
Indoor ambient temperature sensor is open/
short-circuited
F2
Indoor evaporator temperature sensor is
open/short-circuited
H6 Blocked protection of IDU fan motor
C5 Malfunction protection of jumper cap
U8
Zero-crossing inspection circuit malfunction
of the IDU fan motor
E8 Overload protection