Lilytech ZL-620A-R - User Manual

ZL-6XXA-R Series
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1. Feature
ZL-6XXA-R is an electronic thermostat with RS 485, dedicated to control the cold storage,
seafood machine, water heaters, etc.
Front panel water-proof level is IP65. The small case size is same as those on the market.
2. Main Function
● Temperature measurement
● Temperature display
● Temperature calibration
● Compressor delay protection
● Buzzer alarm output
● Defrost control (Based on both timer and temperatures)
● Fan control
● Max high-temperature or min low-temperature exceed warning.
● Sensor failure warning
● External warning input
● RS 485
3. Model List
Model
ZL-610A-R
ZL-620A-R
ZL-630A-R
Cool+External Alarm Input+High Efficient Intelligent Defrost+RS 485
Cool+External Alarm Input+High Efficient Intelligent Defrost +Fan Control+RS 485
Function
Cool+External Alarm Input+Periodic Defrost+RS 485
4. Size Specification
1. Front panel dimension: 78* 34.5mm
2. Drilling template: 71* 29mm
3. Whole machines dimension: 78* 34.5* 71mm
4. Length of sensor(s): 3m (including the sensor probe)
5. Technical Specification
● Temperature Sensor: NTC
● Setting Range: -40～120℃
● Display Range: -50～130℃

Lilytech ZL-620A-R Specifications

General

Brand	Lilytech
Model	ZL-620A-R
Category	Thermostat
Language	English

Summary

Feature

Main Function

Size Specification

Technical Specification

Operation Instruction

Display Indication

Provides an overview of display signs and panel digit indications for various operational states and warnings.

Keypad Operation

Details procedures for setting refrigeration temperature and system parameters using the device's keypad.

Control Function Description

Compressor Control

Explains the compressor's operation logic based on set temperature, delay times, and hysteresis.

Compressor Delay Protection

Outlines the time delays applied before the compressor can start or restart after stopping.

Fan Control

Details fan control modes (controlled and free) and their operational parameters.

Protection Running Mode When Room Temperature Sensor Fails

Describes the protective operation sequence when the room temperature sensor malfunctions.

Protection Running Mode When Defrost Temperature Sensor Fails

Details protective measures when the defrost temperature sensor fails.

Defrosting Function

Covers automatic and manual defrosting cycles, dripping water function, and defrost data checks.

Buzzer Function

Explains buzzer behavior for key presses, parameter confirmation, and system warnings.

High-temperature and Low-temperature Warning

Defines conditions and time parameters for high and low-temperature warning triggers.

External Input Warning

Details how external input signals trigger warning states and their management (Normal On/Off, Lock/Unlock).

Temperature Calibration Function

Describes how to calibrate measured temperature using parameters U20 and U21.

Restore the Default Parameters and Password

Explains the procedure to reset parameters and password to factory defaults.

Controller Installation

Warning

Lists environmental and installation warnings to avoid damage or malfunction.

Installation Procedure

Provides step-by-step instructions for mounting the controller into its designated slot.

Electrical Connection