ELITECH EK-3030E (01) PDF Document

The technical parameters for the ELITECH EK-3030E are as follows:

1) Measuring range: -40°C ~ 99°C

2) Controlling range: -40°C ~ 85°C

3) Accuracy: -30°C ~ 50°C, ±1°C ± 0.5dig; others, ±2°C ± 0.5dig

4) Resolution: 0.1°C

5) Mounting size: 71mm*29mm

6) Power supply: 220 ± 10%(VAC), 50/60Hz

7) Power consumption: <5W

8) Output capacity:

Refrigeration: 10A/220VAC or 16A/220VAC, directly drive a single phase compressor 1HP

Defrost: 10A/220VAC

Fan: 10A/220VAC

One-way buzzer alarm output

9) Work ambient temperature: -5°C ~ 60°C; work ambient humidity: 10% ~ 90% non condensing

10) Storage temperature: -25°C ~ 75°C

11) Sensor type: NTC (10KΩ/25°C, B value 3435K)

12) Sensor length: 2m

The display panel can display three digits, two status indicators (key lock and fan), and four parameter descriptors (temp on, temp off, def cycle, def time).

Under normal running states, all descriptors will not light; when in the menu-setting mode, the corresponding parameter descriptor lights. Under normal running status, if there is refrigeration/heating output, “On” descriptor lights; if defrost runs, “Def” descriptor lights.

Indicator light status description:

There are a total of six keys in the controller.

Under the status of controller locking, press the OK key for one second, the controller will be unlocked, and at the same time, the buzzer beeps for about 30 seconds. If no key operation within 30 seconds, the controller will lock automatically.

Under the normal running status, press the OK key. The corresponding parameter descriptor lights, and it displays the value of “temp on” (or “temp off”) in the display window, which indicates that it has entered the setup menu of “temp on” (or “temp off”). The parameter could be adjusted by pressing the UP or DOWN keys. If the UP or DOWN key is kept pressed, the parameter could be adjusted quickly. In the setting mode, press and release the OK key, or no key operation within 30 seconds, it will exit from setting mode and save the parameters.

Under the normal running temperature display window, press the OK key for more than 5 seconds, and it will display parameter code “F1” in the temperature display window, which indicates that it has entered the system setup menu. The parameter codes could be switched by pressing the UP or DOWN keys, and press and release the OK key to display the corresponding parameter values.

The parameters could be adjusted by pressing the UP or DOWN keys, and if the UP or DOWN key is kept pressed, the parameters could be adjusted quickly. Press and release the OK key to save the modified parameter value and return to display parameter code.

In System menu setting status, press the OK key for 5 seconds or no key operation within 30 seconds, it will save the parameters and exit from system menu setting status.

If an error occurs when you save the parameters, it shows “Err” in the temperature display window, and it returns to the normal display status in 5 seconds.

To access the hidden parameter list, in System menu setting status, press and hold the UP key and DOWN key for more than 5 seconds, it will blinkingly display password setting. The hidden menu is unavailable for access until a correct password is set. The password fixed value is “-15”. Under System menu, press the OK key for 3 seconds, or no key operation within 30 seconds, it will exit from system setting menu.

In the status of non-defrosting, non-defrost-dripping, non-parameter setting, and defrost cycle is not set to 0 and the defrost sensor temperature is less than the set defrost termination temperature (F6), press the defrost key for more than three seconds, it enters to manual defrost status, and the defrost working indicator lights and start defrosting.

In the defrost status (non-parameter setting status), press the defrost key for more than three seconds, it exits from defrost status, and the defrost working indicator flashes, defrost stops and start defrost dripping.

Under the normal running status or lock status, press the DOWN key, it displays defrost sensor temperature in the temperature display window. Release the key, it returns to the normal display status.

Press any key to eliminate the alarm buzzer beeping, but the alarm indicator light will not be off until the alarm is released.

In the key lock status, press the UP key and DOWN key for more than 10 seconds, it displays “CON” for 3 seconds, within these three seconds, press the OK key to confirm the current parameter setting as the factory preset data, and it displays “YES”, so that end-users could recover the controller parameters to the appropriate setting in case of emergency.

In the key lock status, press the UP key and DOWN key for more than 10 seconds, it displays “DON” for 3 seconds, within these three seconds, press the OK key to recover to the factory preset parameter setting and it displays “YES”.

Note: Before recovering to factory preset parameter setting, to make sure that the parameters have previously backed up. Otherwise, it will recover to the factory default parameters.

1) Refrigeration control

Compressor startup condition (meet all the condition as below):

Compressor stop time exceeds the set compressor time delay;

Fan starts ahead of compressor (Fan starts ahead of compressor is set as minus);

The status of non-defrosting, non-defrost-dripping; when cabinet temperature ≥ set “Temp On” value or during hot gas defrost.

Compressor stop condition (meet any of the conditions as below):

When cabinet temperature ≤ set “Temp Off” value;

When start electric-heating defrost;

When hot gas defrost stops;

2) Defrost control

Defrost startup condition (meet all the condition as below):

Defrost cycle is not set as 0;

Defrost sensor temperature is lower than the set defrost termination temperature;

Finish the set “defrost cycle” or forced defrost starts.

Defrost close condition: It is controlled by both temperature and time. After start defrosting, if defrost sensor temperature reaches “defrost termination temperature”, then defrost finishes and stop defrost. If defrost time is too long and exceeds “defrost time”, the controller will also stop defrost. If neither temperature nor time reaches the set value, it could exit from defrost status through manually pressing the key of “forced defrost”.

Defrost dripping time: The purpose of defrost dripping is to discharge the water accumulated during defrost in the evaporator. If the water could not be discharged timely, the water will be frozen again during refrigeration. Therefore, it is necessary to set a defrost dripping time to make sure a timely water discharge during defrost. During this period, the compressor does not start, and “defrost” working status indicator flashes at this time.

3) Fan control

Fan is controlled by compressor time:

-180 ~ -1: Fan starts ahead of compressor 180 – 1S

0: Fan and compressor run synchronically

c: Fan runs continuously

d: Fan runs continuously, stops during defrost and dripping

1 ~ 300: Fan starts behind compressor 1 ~ 300S

The controller has one way buzzer alarm output. In the running status, when the following conditions occur, the buzzer beeps:

When the cabinet sensor fails, it displays the fault code E1 in the temperature display window; the controller will run in the fixed pattern, the compressor stops for 30 minutes, then run for 15 minutes. After cabinet sensor failure is released, it refers to the normal temperature control mode and exits from the fixed compressor start/stop mode.

When defrost sensor fails, it alternately displays the fault code E2 and the current cabinet temperature in the temperature display window; the controller controls according to the set defrost cycle and defrost time. When the defrost sensor failure is released, it refers to the dual-control mode by both time and temperature.

If the cabinet sensor and defrost sensor fail simultaneously, it alternately displays the fault code E1 and E2 in the temperature display window.

When cabinet temperature ≥ “Temp On value” + “over temperature alarm value” and the duration ≥ “temperature alarm time delay” after power on, a high temperature alarm occurs. It alternately displays the current cabinet temperature and the fault code HA in the temperature display window. When cabinet temperature < "Temp On value" + "over temperature alarm value" - "temperature alarm return", it is canceled.

When cabinet temperature ≤ “Temp Off value” – “over temperature alarm value” and the duration ≥ “temperature alarm time delay”, a low temperature alarm occurs. It alternately displays the current cabinet temperature and the fault code LA in the temperature display window. When cabinet temperature > “Temp Off value” – “over temperature alarm value” + “low temperature alarm return”, it is canceled.

Two way digital switch input could be set in different function through parameters “H15” and “H16”.

Start defrost: When F3=2 (controlled by external defrost timer) and digital input valid, and meet the conditions of defrost, start defrosting.

Heating mode: When digital input is valid, it switches to heating mode; when digital input is invalid, it recovers to refrigeration mode.

Normal external alarm: When the digital input is valid, after finish the time delay of parameter A1, if the digital input is still valid, it displays the alarm information EA, and all relay output status is determined by parameter A2. If the digital input is invalid, alarm will stop immediately.

Emergency external alarm: When the digital input is valid, after finish the time delay of parameter A3, if the digital input is still valid, it displays the alarm information CA, and all relay output status is determined by parameter A4. If the digital input is invalid, alarm will stop immediately.

Pressure switch alarm: When the digital input is valid, it displays alarm information CA, all replay output are close. When digital input is invalid, it will automatically reset according to parameter A8 and A9.

Door switch alarm: When the digital input is valid, after finish the time delay of parameter A5, if the digital input is still valid, it displays the alarm information “dor”, and compressor and fan output status are determined by parameter A6 and A7. If the digital input is invalid, alarm will stop immediately.

Based on the wiring diagram, connect the terminals as follows:

Terminals 1 & 2 (Power 220V): Connect the Live (L) and Neutral (N) wires of the 220V power supply here.

Terminal 3 (Compressor): This is the output for the compressor.

Terminal 4 (Defrost): This is the output for the defrost heater.

Terminal 5 (Fan): This is the output for the fan.

Terminal 6 (Common): This is a common terminal for the compressor, defrost, and fan relays.

Terminals 7 & 8 (Cabinet sensor): Connect the cabinet temperature sensor to these two terminals.

Terminals 8 & 9 (Defrost sensor): Connect the defrost (evaporator) temperature sensor to these two terminals. Note that terminal 8 is common for both sensors.

Terminals 10 (GND), 11 (DIG2), 12 (DIG1): These are for the digital inputs. Connect your digital switches (like door switch, pressure switch) between GND and DIG1 or DIG2.

UART Port: There is a 4-pin UART port for communication (S, +5V, RXD, TXD, GND). This is used for connecting to a communication adapter.

Danger:

1. Strictly distinguish the power wire, relay output, sensor down-lead and data line, and the relay could not be overloaded.

2. Prohibit connecting the wire terminals without electricity cut-off.

Warning:

Prohibit using this unit under the environment of over damp, high temp., strong electromagnetism interference or strong corrosion.

Notice:

1. The power supply should conform to the voltage value indicated in the instruction, and make sure a steady power supply.

2. To avoid the possible interference, the sensor down-lead/data line and power wire should be kept in a proper distance.

3. When evaporator sensor is installed, the sensor should be well connected with the copper tube which is 5cm away from evaporator inlet.