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Technical Information
Service Manual
④
Swing function is available only when swing function is set and IDU fan motor is operating.
(8) Display of nixie tube on indoor unit
◆
When energized & started for the first time, the nixie tube defaults to displaying current set temperature.
◆
When set temperature display is set by remote controller, it will display set temperature; when switching to indoor ambient temperature
display from other display status, indoor ambient temperature will be displayed for 3-5 seconds firstly and then set temperature display
returns; if other status are set by remote controller, it will still display original set temperature.
◆
When malfunction occurs, the nixie tube will display corresponding error code. (refer to Error Code List)
◆
In auto defrosting mode, the nixie tube will display “H1”. It is a normal phenomenon. (For some models, the display status is that
heating icon is bright for a while and then off for a while.)
◆
The display light can be closed by pressing light button.
(9) Memory function
①
Power failure in unit ON status
◆
Memorized items: unit ON status, mode, up & down swing, light, set temperature, set fan speed, general timer and Fahrenheit/ Celsius.
◆
General timer will be memorized and the timer time will be recalculated after re-energizing.
◆
Clock timer will not be memorized.
②
Power failure in unit OFF status
◆
Memorized items: unit OFF status, mode, up & down swing, light, set temperature, set fan speed, general timer and Fahrenheit/
Celsius.
◆
General timer will be memorized and the timer time will be recalculated after re-energizing.
◆
Clock timer will not be memorized.
(10) 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.
(11)
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.
(12)
Outdoor fan motor control function
(1) When turning off the unit by remote controller, unit stopping for protection, unit stopping as reaching the temperature point, the
compressor stops and outdoor fan motor stops after 1min.
(2) In fan mode, the outdoor fan motor stops.
(3) After entering defrosting mode, the compressor stops and outdoor fan motor stops after 50s.
(4) After finishing defrosting, the compressor restarts heating and outdoor fan motor starts operation 5s ahead.
(5) Outdoor fan motor is DC motor and it will automatically adjust rotation speed according to ambient temperature.
4 Special functions
(1) HEALTH function (applicable for the models with health function)
