New style refrigeration and defrost conversion thermostat ETC-974
Our company specializes in R&D, production and sales of microcomputer temperature controllers and humidity controllers. The chip used in the temperature controller has stable performance, complete functions, multiple protections, advanced and reasonable structural design and process processing, and the technical level is internationally advanced and domestically leading . This product has a wide range of applications in the field and industry of freezing and refrigeration and refrigeration maintenance. Our company can also design and customize products according to customer requirements.
Features and functions
Refrigeration,defrosting, multi modes fan controlling optional;
Return differential control,temperature display resolution 0.1℃;
Multi alarm function.
Temperature measuring range:-50℃~120℃
Power supply: 230VAC +10%,50/60Hz
Relay (Compressor,Defrost,fan) capacity:10A/230VAC
Digit display:3 digits display minus digit + status indicators (setting, refrigeration, defrost, alarm)
Ambient temperature: -5℃~50℃
Relative humidity:10%～90%RH(not condensing)
Probe type: NTC(-50～120℃) PTC(-50～120℃)
Controller parameters and operation
Set the temperature setpoint
To access the user menu, press and quickly release the "set" key. If alarms are not present, the label KSEf appears. By using the "UP" and "DOWN" keys you can scroll through the other folders in the menu:
-Pb1: probe 1 value folder; -Pb2: probe 2 value folder; -SEt: Setpoint setting folder.
The step of setting the temperature is as below:
When it displays the measured temperature in the display panel, press SET key, it will display Set.
At this time, press SET key, you could view the current temperature setpoint.
Press 公 key or key to modify the setpoint.
Press FNC key, it will display the measured temperature, and exit from the temperature setting. If high/low temperature alarm happens, user could inquiry alarm type through parameter folders “AL”.
ETC-974 has classifies all parameters into seven folders according to the objects and functions: CP、Def, FAn> AL> diS、CnF、FPr, the method to enter the folder is as below:
When it displays the measured temperature in the display panel, press SET key for at least five seconds, it will display the first parameter folder code CP.
At this time, press SET key, it enters the parameter folder CP, and it will display the first parameter diF.
Press key or 〜key, it will display all parameters under the folder of CP in circulation.
If need to view or modify one of the parameters, when it displays the parameter code in the display panel, press SET key to view the parameter setpoint, and then press key or key to modify the setpoint.
Press FNC key, it will exit from the parameter folder of CP, and it will restore to display the parameter CP. Press FNC, it will restore to display the measured temperature value and exit from parameter setting.
Enter the parameter folders of, Def、FAn> AL> diS、CnF、FPr
When it displays the first parameter folder code CP, press 公 key or key, it will display each parameter folder code in circulation.
Select the desired parameter folder code and press SET key, and it will display first parameter of the current parameter folder.
The method to view, modify and exit the parameter value will be the same as above.
Manual activation of the defrosting cycle
To manually activate the defrosting cycle, press the "UP" key for 5 seconds. If defrosting conditions are not present, (for example the evaporator probe temperature is higher than defrost stop temperature), and the display will blink three times, in order to indicate that the operation will not be performed.
ETC-974 has a parameter PA1 which permits user setting a number as the password to enter the parameter folders. In this way, if uses press SET key for five seconds, it will not display the first parameter folder CP, instead, it displays parameter code PAI. Press SET key and then press key or key, input the correct password, it will display parameter folder CP. Other operation is the same as "parameter setting".
E1: Probe 1 in failure
E2: Probe 2 in failure
Note: If simultaneous, they will be showed on the display alternately, every 2 seconds.
EE: Eeprom data storage error
AH 1: High temperature alarm
AL1: Low temperature alarm Note: To silence alarms press any key.