Eliwell EWPlus 978 User Manual

Reduced SET / Economy LED
Permanently on: Energy Saving active
Flashing: reduced setpoint active
Quick flashing: access to level2 parameters
Off: in all other cases
Fans LED
Permanently on: fans active
Off: in all other cases
Compressor LED
Permanently on: compressor active
Flashing: delay, protection or activation
blocked
Off: in all other cases
Defrost LED
Permanently on: output active
Flashing: activated manually or from DI
Off: in all other cases
Alarms LED
Permanently on: alarm active
Flashing: alarm acknowledged
Off: in all other cases
Aux LED
Permanently on: Aux output active
Flashing: Deep cooling Cycle active
Off: Aux output not active
°C LED
Permanently on: °C setting (dro = 0)
Off: in all other cases
°F LED
Permanently on: °F setting (dro =1)
Off: in all other cases
EWPlus 978 - EWKPlus 978
Electronic controllers and keyboards for
refrigeration units
NOTE
When the instrument is powered on it performs a
lamp test, during which time the display and LEDs will
flash for several seconds to check that they all function
correctly.
USER INTERFACE
set
UP
Press and release
Scroll through menu options
Increase values
Hold down for at least 5 sec
User-configurable function
(see parameter H31)
DOWN
Press and release
Scroll through menu options
Decrease values
Hold down for at least 5 sec
User-configurable function
(see parameter H32)
STANDBY (ESC)
Press and release
Return to the previous menu level
Confirm parameter value
Hold down for at least 5 sec
User-configurable function
(see parameter H32)
SET (ENTER)
Press and release
Display alarms (if present)
Open Machine Status menu
Hold down for at least 5 sec
Open Programming menu
Confirm commands
KEYS
EWPlus 978 - EWKPlus 978
N
L
89
10
10 23 6745
11
TTL
EW
PLUS
978
Supply
230Va 4.5W
Max 12A
D.I.2
D.I.1
Pb1 Pb2
Pb3
A C D B
AUX
H21 H23 H24 H22
EWPlus 978 TERMINALS - AP2
N-L
Supply voltage 230Va
6-7
Power input 230Va (Supply)
3-0 N.O. Relay Compressor
(A - ) - Parameter H21
8-10 Probe Pb2
3-1 N.O. Relay Defrost2
(C - ) - Parameter H23
9-10 Probe Pb1
3-2 N.O. Relay AUX
(D -
AUX
) - Parameter H24
11-10 D.I.1 (H11≠0 and H43=n) or Probe Pb3 (H11=0 and H43=y)
3-4 N.O. Relay Defrost
(B - ) - Parameter H22
TTL TTL Input or Digital Input 2 (H12≠0)
3-5 N.C. Relay Defrost
NOTE: for relay and power supply capacities, contact the Sales Office.
EWPlus 978 CONNECTIONS

Eliwell EWPlus 978 Specifications

General

Brand	Eliwell
Model	EWPlus 978
Category	Controller
Language	English

Summary

User Interface and Controls

LED Status Indicators

Key Operations

Controller Configuration and Management

Loading Default Applications

Step-by-step guide to selecting and loading pre-defined application settings (AP1, AP2, AP3).

Reset Procedure

Instructions on how to reset the instrument to its default factory settings.

Menu Navigation and Access

Machine Status Menu

Programming Menu Access

Passwords and Security

Details on setting and using PA1 (User) and PA2 (Installer) passwords for security.

System Modes and Diagnostics

Diagnostic Error Codes

Lists and explains common error codes (E1, E2, E3) and their meanings.

Alarm Management and Troubleshooting

General Alarms Description

Details various fault labels (E1-E3, AH1, AL1, EA, OPd, Ad2, COH, nPA, PAL, nL) and their causes.

Max/Min Temperature Alarms

Explains temperature alarm conditions and parameters (HAL, LAL, AFd) for setpoint and absolute values.

Electrical Connections

Wiring Guidelines

Important instructions and precautions for making electrical connections to the instrument.

User Menu Parameters

Setpoint and Differential Parameters

Parameters related to setpoint (SEt, HSE, LSE) and compressor differentials (dF1).

Defrost and Fan Parameters

Alarm and Input/Output Parameters

Security and Display Parameters

Installer Menu Parameters

Compressor and Defrost Settings

Parameters for compressor operation (CP folder) and various defrost types (dEF folder).

Fan Control Parameters

Alarm and Input/Output Configuration

Parameters for alarms (AL folder) and digital input/output configurations (Lit folder).

Installer Menu Parameters (Continued)

Alarm and Deep Cooling Parameters

Settings for alarm behaviour (AL folder) and deep cooling functions (dEC folder).

Energy Saving and Communication Settings

Display and Security Settings

Configuration and Function Settings

Display Mode and Input/Output Configuration

Keypad and Defrost Configuration

Function and Copy Card Settings