Контроллер элитеч 974 ошибка е2

Китайский терморегулятор Poletron EL-974 приобрёл тенденцию пищать и выдавать ошибку E2 ( датчик испарителя ). При этом работает вроде нормально. На сегодняшний день это уже пятый прибор с такой болячкой. Предыдущие 4 я вернул поставщику. Последний отработал 2 месяца нормально, а сегодня запищал. После перезагрузки работает около часа, потом снова пищит Е2. Датчики менял, параметры Alarm проверял, всё как обычно. Неужели партия с кривой прошивкой?!
Ставил Ranko 2310 вместо Полетрона — полет нормальный на тех же датчиках.

Решение
Новая прошивка контроллеров слегка кастрирована. Выражено в несоответствии таблицы сопротивлений датчика оттайки. Поэтому при наборе температуры выше -25 на датчике оттайки, что более 70кОм — происходит якобы обрыв датчика. Протестировано и опробовано практически.

User Manual

ECS-974neo Temperature Controller

1. Product overview

ECS-974neo is a universal standard temperature controller.

2.Display and operation panel

Mounting size: 71 x 29 mm

3. Technical parameters

1)Temperature measuring range: -50℃~99℃(Only when sensor calibration value is set to 0)

2)Resolution: 0.1℃/1℃ settable

3)Accuracy: ±1℃(-40℃~50℃), ±2℃(others)

4)Temperature control range: -50℃~99℃

5)Power supply: 220 VAC±10 %, 50/60Hz; Overall power consumption: <3W

6)Input port: Cabinet sensor, Evaporator sensor

7)Output port: Cooling/Defrost/Fan

8)Protection grade of front panel: IP65

9)Operating ambient temperature:0℃~55℃

10)Storage temperature:-25℃~75℃

11)Storage humidity: 20%~85% (non-condensing)

4. LED

LED

Symbol

Setting

set

Cooling

Defrost

Fan

drip

Drip

5.Parameter table

Menu

No.

Description

Item

0

SEt

Temperature set-point

1

PA1

Administrator menu password

2

diF

Differential

3

HSE

Higher SEt. Max possible set-point

4

LSE

Lower SEt. Min possible set-point

Product size: 78.5 x 34.5 x 74 mm

Status

Meaning

ON

Set administrator menu

ON

Cooling starts.

OFF

Cooling stops.

Flash

Cooling delays.

ON

Defrost starts.

OFF

Defrost stops.

ON

Fan starts.

OFF

Fan stops.

ON

Dripping.

OFF

Drip stops.

Setting range

User menu

LSE~HSE

Administrator menu

00~250

0.1℃~30.0℃

SEt~99.0

-50.0~SEt

Menu

No.

Item

5

Ont

Ont: On time (compressor). Compressor activation time in the event of faulty probe.

OFt: OFF time (compressor). Compressor stop time in the event of a faulty probe.

If Ont=0, the compressor is off.

6

OFt

If Ont≠0 and OFt=0, the compressor is always on.

If Ont≠0 and OFt≠0, the compressor functions in duty cycle mode per Ont/OFt.

Delay (after power) OFF. Delay after switch off; the indicated time must elapse

7

dOF

between switch-off of the compressor relay and the successive switch-on.

Delay Output (from power) On. Delay time in activating the outputs after switch-on

8

OdO

of the controller or after a power failure.

Defrost type:0 = electric defrost;

9

dty

1 = reverse cycle defrost (hot gas);

2 = Free defrost (compressor hot).

10

Defrost interval time. Interval between the start of two successive defrost

dit

operations.

Defrost Counting type. Selection of count mode for the defrost interval.

0 = compressor operating hours;

11

dCt

1= fixed time interval;

2 = compressor stop hours.

12

dOH

Defrost offset hour. Start-of-defrost delay time from startup of controller.

13

dEt

Defrost endurance time. Defrost time-out; dEt=0, defrost is disabled.

14

H42

Whether to enable evaporator sensor: y=yes; n=no

15

dSt

Defrost stop temperature

Defrost (at) Power On. Determines if at the start-up the controller must enter

16

dPO

defrosting (if the temperature measured allows this operation).

y = yes; n = no.

17

FSt

Fan stop temperature

18

FAd

Fan activation differential

19

Fdt

Fan delay time. Delay time in activating fans after a defrost operation.

20

dt

Drainage time. Dripping time

Defrost fan disable. Allows to select the evaporator probes exclusion during defrost.

21

dFd

y = yes; n = no.

Fan Compressor OFF. Allows selecting compressor fans lock OFF (switched off). y =

22

FCO

fans activated; n = fans off

23

HAL

High Alarm differential

24

LAL

Low Alarm differential

Power-on Alarm Override. Alarm exclusion time after controller switch on or after a

25

PAO

power failure.

26

dAO

Defrost Alarm Override. Alarm exclusion time after defrost.

27

tAO

Temperature Alarm Override. Temperature alarm signal delay time.

28

LOC

Keyboard locking. y = yes; n = no

29

PA1

Password 1.

30

ndt

number display type. View with decimal point. y = yes; n = no

Calibration 1. Positive or negative temperature value added to the value read by

CA1

31

Default Unit

probe 1.

Calibration 2. Positive or negative temperature value added to the value read by

32

CA2

probe 2.

4.0℃

℃

Defrost display Lock. Viewing mode during defrosting.

0 = shows the temperature read by the cabinet probe;

—

/

1 = locks the reading on the temperature value read by cabinet probe when

33

ddL

2.0

℃

defrosting starts, and until the next time the Set-point value is reached;

90.0

℃

2 = displays «dEF» during defrosting, and until the next time the Set-point value is

reached.

-50.0

℃

Description

Setting range

-50.0~99.0

-50.0~99.0

1.0~50.0

0.1~20.0

0.1~20.0

-12.0~12.0

-12.0~12.0

Default Unit

0~250

0

min

0~250

1

min

0~250

0

min

0~250

0

min

0~2

0

/

1~250

6

hour

0/1/2

1

/

1~59

1

min

0~250

30

min

n/y

y

/

8.0

℃

n/y

n

/

2.0

℃

2.0

℃

0~250

0

min

1~250

1

min

n/y

y

/

n/y

y

/

4.0

℃

4.0

℃

0~15

0

hour

0~250

0

min

0~250

0

min

n/y

n

/

0~250

5

/

n/y

y

/

0

℃

0

℃

0/1/2

1

/