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Electronic Temperature Controller Series

Instruction Manual for EW- T205

Firstly, thanks for you using our instruments. Combined with extensive refrigerating techniques, operated simply,controlled temperature accurately, and with strong interference resisting ability, the product is a fully-automatic intelligent control system applicable for various refrigerating and warming equipment. The product is ultra-thin, waterproof, high-pressure, external, more reliable and safer.Our sensors are processed and encapsulated precisely, moistureproof, with more stable and reliable performance.

Specifications

1. Operating voltage: AC 12V 土 10% 50HZ/60HZ

2. Output load: compressor relay, normally open, 16A/250VAC.

Can be used directly for compressors below 1.5 horsepower; in case 1.5 horsepower is exceeded, required to connect AC contactor.

Defrosting relay: 8A/220V/AC; fan relay: 5A/220V/AC 。

3. Power consumption: ≤ 3W

4. Operating environment: -10 ～ 50 ℃ RH ≤ 90%

5. Control range: -45

℃ ～

45

℃(0

40 F

～ 0

120 F

）

6. Resolution: 1

℃

Precision:+1

℃

7. Input signal:one line for temperature sensor, one line for defrosting sensor, wire in two meters long.

8. Outline dimension: 78(W) × 35(H) × 62(D)mm

9. Hole dimension: 71(W) × 29(H)

Schematic Diagram of Panel

Fan Indicator

Current Temperature

PV

SV

Refrigerating Indicator

Defrosting Indicator

Trouble Indicator

Forcible Defrosting Key

！

。

F

Set

Setting Key

Setting Indicator Locking Indicator

Control program profile

1. Control temperature setting: Press to show the control temperature, and press or to modify the control temperature.

2. Parameter setting: Press and hold on for 6 seconds to show PA, press or to enter into menu password input. After input the password (If the input password is wrong, can only search the set parameter value, but can not modify the parameter value, and the password is hidden.), press to enter into setting procedure, i.e. to show E1, then continuously press to show the parameters of menus

bF and reset the parameters after entered into the menu

3. Display the temperature of defrosting sensor head:

Press to show the temperature of defrosting sensor head.

4. Forcible defrosting key: Long press to defrost forcibly.

5. After press for one second, simultaneously press for 6 seconds to show flashing. At this time all the parameters shall be restored to their default values. Normal operating mode will resume after 10 seconds.

6. Can remember the operating mode before fault.

版 本 ： T205.12.03.26

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

PV

SV

Display

！

。

C

。

F

！

。

C

。

F

！

。

C

。

F

！

。

C

。

F

！

。

C

。

F

。

C

。

F

！

。

C

。

F

Set

After pressing for 6 seconds, input correct password, and simultaneously press or to modify the minimum temperature limit, -

45 ℃, to the control temperature.

After pressing , press and to choose the maximum temperature limit and control temperature to 45 ℃.

Set

Set

Set

Set

Set

After pressing ,press and to choose the temperature return difference as 1-10 ℃.

After pressing ,press and to choose the delayed startup as 0-10 mins.

After pressing ,press and to choose the temperature calibration as -

15 ℃ -15 ℃.

After pressing ,press and to choose the defrosting sensor temperature calibration.

After pressing , press and to choose 00 or 01.

！

。

F

Set

After pressing , press and to choose defrosting, in time of 1-60mins.

！

。

C

。

F

！

。

C

。

F

！

。

C

。

F

Set

Set

Set

After pressing , press and to choose the defrosting cycle time as 0-

24hrs.

After pressing , press and to choose the defrosting termination temperature.

After pressing , press and to choose 00 or 01.

！

。

C

。

F

！

。

F

！

。

C

。

F

！

。

C

。

F

！

。

F

Set

Set

Set

Set

After pressing , press and to choose the startup mode of energized fan.

After pressing , press and to choose the water dripping time after defrosting as 0-20mins.

After pressing , press and to choose the startup time of fan after defrosting.

After pressing , press and to choose the startup time of fan.

Set

After pressing , press and to choose the startup temperature of fan.

！

。

C

。

F

！

。

C

。

F

！

。

C

。

F

Set

Set

Set

After pressing , press and to choose the temperature unit, 00 or 01.

After pressing , press and to modify the password (00-99, 00 indicates to cancel the locking.).

After pressing , press and to choose the status of buzzer. 00 indicates mute and 01 indicates working properly.

Program Parameter Table

Code Function Setting Range

Password input

Min. limit

Max. limit

Temperature return difference

Delayed time

Temperature calibration

Defrosting calibration

Defrosting type

Defrosting time

Defrosting cycle

Defrosting termination temperature

Temperature display in defrosting

Fan startup mode

00 ～ 99

-45 ℃

-40 F to temp.control

temp.control

1 to

45 ℃

120 F

1

1-10 ℃

1-36 F

0 ～ 10

-15 ～ 15 ℃ / °

-15 ～ 15 ℃ / °

00 ＝ Electric defrost

01 ＝

Heatingdefrost

01 ～ 60

00 ～ 24

00 ～ 45 ℃

32

～

110 F

00 ～ 01

00=Synchronous

operation

01=Running

Water dripping time after defrosting

00 ～ 10

Ex-factory

Value

00

-45 ℃ /40 °

20 ℃ /100 °

2/5

1

00

00

0

10

6

05/40

00

00

02

Unit

-

℃

/

℃ / °

℃ / °

Min

℃ / °

℃ / °

-

Min

Hour

℃ / °

00 storage temperature

01defrost start temperature

-

Min

Electrical Wiring Diagram

16A

1

8A 5A

2 3 4

5A

Mode

：

EW-T205

NTC

Sensor

12V/AC

5 6 7 8 9 10 11 12

Fan startup mode after defrosting

Fan startup time after defrosting

Fan startup temperature after defrosting

Temperature unit conversion

00=Press F8 the parameter

values running

01=Press F9 the parameter

values running

00

～

20

-20~20 ℃

-04~68 °

00= ℃

01= °

Password setting 00 ～ 99

Buzzing setting

00

～

01

00

00

00

-

02

-08 ℃

-18 °

Min

℃ / °

00 ℃ / °

-

-

Descriptions: If a password is set, the locking indicator will light, and the other parameter values can be modified only when a correct password is input, otherwise the set parameters only can be searched but not modified, and the password menu is hidden, but the control temperature still can be modified. When the password is set as 00, the password is cancelled and it is unnecessary to input password

(locking indicator is off). When F7 is set as 00, F8 is enable and F9 is disable; when F7 is set as 01, F9 is enable and F8 is disable

Feature Descriptions

Cooling : When the current temperature ≥ setting temperature + temperature hysteresis and delay the setting of the " delay time ", the load relay On.

Into defrost ：

1 . when the instrument after defrost ( or boot ) to run a set running period of time and then into defrost ( load relay Off , defrost relay

On , defrost indicator On).

2 .

press UP key into the defrost ( load relay Off , defrost relay On , defrost indicating On).

Exit the defrost ：

1.entering

the defrost time and delay after the set defrosting time , defrost relay off , defrost indicator off , exit the defrost status , return to the normal control status.

2. the exit temperature to defrost, defrost relay off, defrost LED is off, return to the normal control.

Note: When you press Heat key, if defrost sensor temperature

≥ exit defrost temperature, the system can not enter defrost stage, to keep the current state.

220V/AC

Load

Troubleshooting

Troubles

Power no display

With display but no operation

Displayed temperature unstable or malfunction

Causes

Whether the power source is off;

Whether the temperature controller is defective.

Set temperature higher than the current temperature;Pressure overrun and overloaded, thermal protection opens;Internal thermal protection of compressor opens.

Sensor circuit interfered; connection poor; binding with other power cords; circuit damage too weak.

Solutions

Check the power supply line, and replace the fuse;

Check whether the power end is imputed, or inform the distributor to replace the temperature controller.

Reset the required temperature control value;

Check overrun and overload, check overheat causes, and eliminate the troubles before reset to work.

Separate sensor with power cord or replace shielded wire, check whether connecting terminal be tightened.

Difference betweentemperature values in warehouse and measured value of temperature controller large

Not shut down after temperature reached

Refrigerating machine overfrequency

Installation position of sensors incorrect;

Connecting wire too long, line resistance large; contact of connecting wire poor; sensor damaged.

Sensor installed incorrectly, unable to measure value correctly;

Contactor of compressor defective.

Return difference temperature value too small or pressure protector setting incorrect.

LL shown

HH shown

Must install sensors correctly; increase cross section of extension wire; ensure sealing property of connecting wires, water and moisture proofing; replace sensor.

Check whether sensor measures temperature correctly; replace contactor of compressor.

Readjust to increase return difference temperature value; adjust pressure protector setting.

Ultralow temperature alarm or sensor line off.

Ultralow temperature alarm or sensor line shorted.

Check set data or check whether sensor line connected well with joint.

Note: When LL or HH is shown, the machine will run automatically in the running mode before trouble occurred to guarantee the temperature not affected much.

Warnings

1. Please read this product instruction carefully and connect input/output plugs of power & sensor to the corresponding sockets strictly by following connection diagram, otherwise the usage & operations will be affected. Check again to make sure there is no mistake. Tighten all the screw of connection plugs again, and then connect it to the power for running.

2. Keep away this product from moist or corrosiIve air and high magnetic field. Otherwise the normal operaton of this product will be affected.

3. All our products have passed strict quality inspections before leaving factory. We provide one-year quality guarantee

(which is limited to product itself) period for this product.

If you have any doubt or problem concerning the electronic temperature or humidity controller made by us, please contact our distributors and we will provide you high-quality aftersale services. Thanks!

Guangzhou Eliweli Autocontrol Tech. Co., Ltd.

http://www.eliweli.com