•Range of set temperature: ‐45~45 C
(‐40~120 F)
•Temperature sensor: NTC, double sensor.
•Output contact capacity for compressor: N.O. 20A/250V~; 50/60Hz. The inrush current for compressor control may be 20A instead of 8A during the period of 1s at start. (applicable to 1 H.P. compressor if more connected to AC contactor)
•Output contact capacity for Evap. Fan: N.O. 20a/250V~; 50/60Hz.
•Main controller panel dimension 78X35X76mm. Mounting dimension: 71:29mm
Indicator
•Refrigerant: When the refrigerant LED is on, the compressor is working.
•Constant temperature: When the refrigerant LED is off, the compressor has stopped.
•Delay: When the refrigerant LED flashes, the compressor stops.
•Defrost: When the defrost LED is on, the compressor and fan stop and the heater works.
•Evaporator fan: When the fan LED is on, the fan is working.
Front Panel Operation
•Set temperature: Press 
button, the set temperature is displayed; Press or button to modify and store the displayed value, press 
button to exit the adjustment and display the cold‐room temperature.
•Manual start/stop defrost: Press 
button and hold for 6 seconds to defrost or stop defrost.
•Display the evaporator temperature: Press 
button and hold for 6 seconds. The evaporator temperature will be displayed. After 10 seconds, the cold‐room temperature is resumed to be displayed.
Parameter Setup
•Indication for setting parameter: The parameter can be adjusted only after correct PA has been entered. All parameters can only be checked, not adjusted; however, it is available for temperature controlling.
6
•Setting Parameter: Press 
for 6 seconds. Start parameter menu and PA (menu password) flashing. Enter the password by pressing 
or 
. Press 
again to choose the parameter. Press 
or 
then the parameter can be displayed and adjusted. After the adjustment, if no button has been pressed after 30 seconds, the system will restore the new parameter and go back to normal operations.
•Changing menu password (CPA): The CPA can be checked or changed only after the correct menu password has been entered. When it shows CPA, press 
or 
then the present password is displayed and can be changed to a new password. Press 
to confirm the new password. (Please memorize the new password or you can never adjust other parameters.)
•The factory default resumption: Press 
button for 1 second and then press 
button simultaneously for 6 seconds. The indicator will flash and then all parameters will be restored to back to the factory defaults. After 10 seconds, it will return to normal operation.
Parameter details
•Temperature controlling: After turning on for the delay time (e4), the compressor starts operating
when cold‐room temperature (set temperature +hysteresis), and will off when cold‐room temperature set temperature. To protect the compressor it can be re‐started, unless the time when the compressor stops every time is longer than the delay time (E4).
•Evaporator fan operating function: F5 is set “00”, parallel with compressor.
F5 is set “01”, continuous running (except defrost).
•Electric heater defrost: evaporator sensor temperature < defrost termination temperature (F3), the heater will switch on and the defrost will start.
After a defrost interval, it begins the automatic defrost function. e.g.: When the evaporator sensor temperature < defrost termination temperature (F3), the defrost LED will turn on, the compressor and fan will stop, and the heater will start. When the evaporator