Elitech ECS-974neo - User Manual

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User Manual ECS-974neo Temperature Controller

1. Product overview

Mounng size: 71 x 29 mm Product size: 78.5 x 34.5 x 74 mm

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

2)Resoluon: 0.1℃/1℃ seable

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

4)Temperature control range: -50℃~99℃

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

6)Input port: Cabinet sensor, Evaporator sensor

7)Output port: Cooling/Defrost/Fan

8)Protecon grade of front panel: IP65

9)Operang ambient temperature:0℃~55℃

10)Storage temperature:-25℃~75℃

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

5.Parameter table

2.Display and operation panel

3. Technical parameters

4. LED

set

LED

Seng

Cooling

Defrost

Fan

Drip

Status

OFF

Flash

OFF

Meaning

Set administrator menu

Cooling starts.

Cooling stops.

Cooling delays.

Defrost starts.

Defrost stops.

Fan starts.

Fan stops.

Dripping.

Drip stops.

Symbol

drip

No.

Item

Descripon Seng range Default Unit

User menu

SEt

Temperature set-point

LSE~HSE

4.0

℃

Administrator menu

PA1

Administrator menu password

00~250

2 diF Diﬀerenal 0.1℃~30.0℃ 2.0 ℃

HSE

Higher SEt. Max possible set-point

SEt~99.0

90.0

℃

4 LSE Lower SEt. Min possible set-point -50.0~SEt -50.0 ℃

No.

Item

Descripon Seng range Default Unit

Ont

Ont: On me (compressor). Compressor acvaon me in the event of faulty probe.

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

If Ont=0, the compressor is oﬀ.

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

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

0~250

min

6 OFt 0~250 1 min

7 dOF

Delay (aer power) OFF. Delay aer switch oﬀ; the indicated me must elapse

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

0~250 0 min

8 OdO

Delay Output (from power) On. Delay me in acvang the outputs aer switch-on

of the controller or aer a power failure.

0~250 0 min

9 dty

Defrost type:0 = electric defrost;

1 = reverse cycle defrost (hot gas);

2 = Free defrost (compressor hot).

0~2 0 /

dit

Defrost interval me. Interval between the start of two successive defrost

operaons.

1~250 6 hour

11 dCt

Defrost Counng type. Selecon of count mode for the defrost interval.

0 = compressor operang hours;

1= ﬁxed me interval;

2 = compressor stop hours.

0/1/2 1 /

dOH

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

1~59

min

dEt

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

0~250

min

H42

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

n/y

dSt

Defrost stop temperature

-50.0~99.0

8.0

℃

dPO

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

defrosng (if the temperature measured allows this operaon).

y = yes; n = no.

n/y n /

FSt

Fan stop temperature

-50.0~99.0

2.0

℃

FAd

Fan acvaon diﬀerenal

1.0~50.0

2.0

℃

Fdt

Fan delay me. Delay me in acvang fans aer a defrost operaon.

0~250

min

Drainage me. Dripping me

1~250

min

dFd

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

y = yes; n = no.

n/y y /

FCO

Fan Compressor OFF. Allows selecng compressor fans lo ck OFF ( switched oﬀ). y =

fans acvated; n = fans oﬀ

n/y y /

HAL

High Alarm diﬀerenal

0.1~20.0

4.0

℃

LAL

Low Alarm diﬀerenal

0.1~20.0

4.0

℃

PAO

Power-on Alarm Override. Alarm exclusion me aer controller switch on or aer a

power failure.

0~15 0 hour

dAO

Defrost Alarm Override. Alarm exclusion me aer defrost.

0~250

min

tAO

Temperature Alarm Override. Temperature alarm signal delay me.

0~250

min

LOC

Keyboard locking. y = yes; n = no

n/y

PA1

Password 1.

0~250

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

CA1

Calibraon 1. Posive or negave temperature value added to the value read by

probe 1.

-12.0~12.0 0 ℃

CA2

Calibraon 2. Posive or negave temperature value added to the value read by

probe 2.

-12.0~12.0 0 ℃

33 ddL

Defrost display Lock. Viewing mode during defrosng.

0 = shows the temperature read by the cabinet probe;

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

defrosng starts, and unl the next me the Set-point value is reached;

2 = displays “dEF” during defrosng, and unl the next me the Set-point value is

reached.

0/1/2 1 /

ECS-974neo is a universal standard temperature controller.

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Summary

Product Overview and Technical Specifications

Product Overview

ECS-974neo is a universal standard temperature controller.

Display and Operation Panel

Details the mounting size and product dimensions of the controller.

Technical Parameters

Lists temperature range, resolution, accuracy, power supply, inputs, outputs, and environmental ratings.

LED Indicators

Describes the meaning of LED status lights for Set, Cooling, Defrost, Fan, and Drip functions.

Parameter Table

Lists user and administrator menu parameters with their descriptions, setting ranges, defaults, and units.

Key Functions and Operations

Key Functions

Details the functions of the SET key for accessing menus and operations.

User Operations

Guides on setting temperature, password, parameters, resetting, forcing defrost, and using the copy card.

Control Output and Alarm Management

Cooling Control

Explains the conditions for compressor activation and stopping based on temperature and protection times.

Defrost Operation

Details defrost start/stop conditions, types, endurance, dripping time, and display options.

Fan Control

Describes fan operation based on evaporator temperature, cooling/defrost status, and delay times.

Alarm Conditions

Outlines fault codes for sensor failures and triggers for high/low cabinet temperature alarms.

System Setup and Safety

Fault Codes

Lists display codes for sensor faults, alarms, copy card issues, and reset operations.

Wiring Diagram

Illustrates the terminal connections for sensors, power supply, and relays.

Safety Precautions

Provides warnings on proper wiring, power supply, environmental conditions, and interference.

The ECS-974neo is a universal standard temperature controller designed for precise temperature management.

Function Description

The device primarily functions as a temperature controller, offering both cooling and defrost capabilities. It allows users to set a desired temperature set-point (SEt) within a range of -50.0°C to 99.0°C. The controller activates cooling when the cabinet temperature exceeds the set-point plus a defined differential (diF), and stops cooling when the temperature falls below the set-point.

Defrosting can be configured in various modes: electric defrost, reverse cycle defrost (hot gas), or free defrost (compressor hot). Defrosting is disabled if the defrost endurance time (dEt) is set to 0. Otherwise, defrosting can be initiated by specific conditions such as the evaporator sensor temperature exceeding the defrost stop temperature (dSt), the defrost offset hour (dOH) elapsing after power-on (if dPO=y), the defrost interval time (dit) elapsing, or by manually forcing defrost for 3 seconds. Defrosting stops when the evaporator sensor temperature exceeds dSt (if H42=y) or when the defrost endurance time (dEt) elapses. After defrosting, the controller enters a drainage time (dt) to allow water to drip, during which cooling is disabled.

The fan operation is linked to the evaporator sensor temperature (if H42=y), running when the evaporator temperature is below the fan stop temperature (FSt) minus the fan activation differential (FAd), and stopping when it exceeds FSt. In cooling status, fan operation can also be controlled by the compressor (FCO=n) or run continuously (FCO=y). During defrosting, the fan can be disabled (dFd=y) or run continuously (dFd=n).

The controller also features alarm functions for high and low cabinet temperatures (AH1, AL1), triggered when the cabinet temperature deviates from the set-point by the high alarm differential (HAL) or low alarm differential (LAL), respectively, and after a temperature alarm signal delay time (tAO). It also indicates sensor faults (E1 for cabinet, E2 for evaporator) and copy card programming failures (Er, EP).

Important Technical Specifications

Temperature Measuring Range: -50°C to 99°C (with sensor calibration value set to 0)
Resolution: 0.1°C or 1°C (settable)
Accuracy: ±1°C (-40°C to 50°C), ±2°C (others)
Temperature Control Range: -50°C to 99°C
Power Supply: 220 VAC ±10%, 50/60Hz
Overall Power Consumption: <3W
Input Ports: Cabinet sensor, Evaporator sensor
Output Ports: Cooling, Defrost, Fan
Protection Grade (Front Panel): IP65
Operating Ambient Temperature: 0°C to 55°C
Storage Temperature: -25°C to 75°C
Storage Humidity: 20% to 85% (non-condensing)
Mounting Size: 71 x 29 mm
Product Size: 78.5 x 34.5 x 74 mm

Usage Features

The ECS-974neo offers a user-friendly interface with a clear LED display and intuitive buttons for operation.

Setting Parameters:

User Menu: Access by pressing and releasing the SET key. Allows adjustment of the temperature set-point (SEt) using the arrow keys.
Administrator Menu: Accessed by pressing SET for 5 seconds, requiring a password (PA1). The default universal password is 125. This menu allows configuration of advanced parameters such as differential (diF), maximum/minimum set-points (HSE, LSE), compressor on/off times (Ont, OFt), delay times (dOF, Odo), defrost type (dty), defrost interval (dit), defrost counting type (dCt), defrost offset hour (dOH), defrost endurance time (dEt), evaporator sensor enablement (H42), defrost stop temperature (dSt), defrost at power on (dPO), fan stop temperature (FSt), fan activation differential (FAd), fan delay time (Fdt), drainage time (dt), defrost fan disable (dFd), fan compressor OFF lock (FCO), alarm differentials (HAL, LAL), power-on alarm override (PAO), defrost alarm override (dAO), temperature alarm override (tAO), keyboard locking (LOC), password (PA1), number display type (ndt), and sensor calibrations (CA1, CA2).
Display Modes during Defrost: The defrost display lock (ddL) parameter allows choosing to show the cabinet probe temperature, lock the reading at the start of defrost, or display "dEF".

Operational Controls:

Force Defrost: Press the defrost button for 3 seconds to manually initiate or stop defrosting.
View Evaporator Temperature: Press the down arrow key to display the evaporator temperature.
Keyboard Locking: The keyboard can be locked (LOC=y) to prevent accidental changes.
Reset to Default: Press and hold the up and down arrow keys for 10 seconds to reset all parameters to their default values.

Copy Card Functionality:

Upload Parameters: Parameters can be uploaded from the controller to a copy card by inserting the card and pressing the up arrow key until "up" is displayed.
Download Parameters: Parameters can be downloaded from a copy card to the controller by inserting the card and pressing the down arrow key until "do" is displayed. Error messages ("Er" or "EP") indicate programming failures, often due to connection issues or incompatible copy card data.

Maintenance Features

Self-Diagnosis: The controller displays fault codes (E1, E2, AH1, AL1, Er, EP) to assist in troubleshooting.
Calibration: Sensor calibration parameters (CA1, CA2) allow for fine-tuning temperature readings to ensure accuracy.
Parameter Reset: The ability to reset parameters to default values simplifies troubleshooting and configuration.

Safety Precautions:

Wiring: It is crucial to distinguish and correctly connect sensor leads, power cords, and relays. Wiring should only be performed after disconnecting the power supply. Overloading relays must be avoided.
Environment: The controller should not be used in wet, humid, high-temperature, or corrosive environments, nor in areas with strong electromagnetic interference.
Power Supply: Ensure the power voltage matches the controller's specifications and remains stable.
Sensor Placement: Maintain a suitable distance between sensor leads and power cords to minimize interference. Sensors should be removed by gently plugging them out downwards.