Eliwell

EWDR 984

EWDR Series • Refrigeration Controller

Type Refrigeration

Application Cold Room

Probe Inputs 4

Relay Outputs 6

Communication RS485 Modbus

Panel Size 71x29 mm

R1 Compressor 1

R2 Compressor 2

R3 Defrost

R4 Fan

R5 Alarm

R6 Auxiliary

Rack controller for multi-evaporator cold room systems

Technical Specifications

Display Type	LED
Display Digits	4
Buttons	6
LED Indicators	Comp 1, Comp 2, Defrost, Fan, Alarm, Remote

Relay Outputs	6
Relay Rating	8A/250VAC

Operating Temp	-10 to 55°C
Storage Temp	-30 to 70°C

Terminal	Function	Type	Wire Color
L	Power L	Input	brown
N	Power N	Input	blue
Pb1	Probe 1 (Room)	Input	red/white
Pb2	Probe 2 (Evap)	Input	red/white
Pb3	Probe 3 (Discharge)	Input	red/white
Pb4	Probe 4 (Auxiliary)	Input	red/white
DI1	Digital Input 1	Input	gray
DI2	Digital Input 2	Input	gray
GND	Input Common	Input	gray
R1	Relay 1 (Comp 1)	Output	black
R2	Relay 2 (Comp 2)	Output	black
R3	Relay 3 (Defrost)	Output	orange
R4	Relay 4 (Fan)	Output	green
R5	Relay 5 (Alarm)	Output	red
R6	Relay 6 (Aux)	Output	yellow
A	RS485 A	Comm	blue
B	RS485 B	Comm	yellow

Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.

Code	Parameter	Range	Default	Description
SET	Setpoint	-50 to 150	0 °C	Main temperature setpoint
SET2	Night Setpoint	-50 to 150	-2 °C	Energy saving setpoint
Hy	Differential	0.1 to 25.5	2 °C	Control differential
Hy2	Stage 2 Diff	0.1 to 25.5	4 °C	Second compressor differential
dOn	Comp Delay	0 to 255	0 min	Compressor startup delay
dOF	Min Off Time	0 to 255	3 min	Minimum compressor off time
CdL	Stage Delay	0 to 255	5 min	Delay between stages
dFt	Defrost Type	0-4	1	Defrost method
dt	Defrost Duration	0 to 255	30 min	Maximum defrost time
dit	Defrost Interval	0 to 48	6 hr	Time between defrosts
dSt	Defrost End Temp	0 to 50	8 °C	Termination temperature