COTEK CR Series Inverter Charge Controller

Overview CR-22 is a remote control designed for connecting to SC inverter/charger

The package includes:

1. CR-22
2. 7.5m Cable (RJ11 & RJ45)
3. Quick Guide

The CR  22 is equipped with the following features

1. LED Indicator
   The LED provides the inverter/charger statuses in a straightforward way.
2. LCD Display: LCD Display – The LCD display is a 16 x 4 line alphanumeric display used for setting up the inverter/charger operation, as well as viewing current status or fault messages.
3. ON/OFF Push button To turn on/off the UNIT quickly.

Buttons
Click buttons allow you to select a menu item or to save a setting, once it is displayed on the LCD screen.

WARNING:
Turning the unit OFF does not mean to disconnect the batteries or AC Power Source. Therefore, the “AC output load” is still active.

WARNING:
Only use the remote control cable supplied; using different cables could cause permanent damage to the SC inverter unit

SC Connector port
Connect the CR 22 & SC with cable(RJ11).

LFP & SPT series Connector port
Connect the CR 22 & LFP & SPT series with cable(RJ45).

Terminating resistor (default : OFF=O)
For the last connected, please slide the slide switch to the on position for the terminating resistor to be activated.

Installation

Installation Guidelines

• Please determine the remote cable route throughout the home or vehicle/boat, both to and from the inverter b efore connecting any wires
• Always check for existing electrical, plumbing, or other areas of potential damage before drilling or cutting into walls to mount the remote.
• Make sure all wires have a smooth bend radius and do not become kinked.
• Please ensure the conductors passing through walls, bulkheads, or other structural members are protected. This minimizes insulation damage such as chafing, which can be caused by vibration or constant rubbing when installing this remote in a boat, RV, or truck.

Installation Overview

• The remote is required in order to connect the inverter/charger. Each inverter/charger must be connected directly to the remote using the supplied RJ11 communication cables.
• The remote must be located close to the inverter/chargers within 7.5 meters and acts as the system control panel.

Mounting the Inverter

• Select an appropriate location to install the remote.
• Mount the remote base to the wall using the 4 screws provided. Please refer to Fig. 1

Connecting the RJ-11 Cable
Please use RJ 11 cable supplied with remote to connect to SC series See below indication.

Note:
CR 22 cannot be connected to two or more inverters at the same time.

Connecting the RJ-45 Cable
Please use RJ 45 cable supplied with remote to connect to LFP /SPT series See below indication.

Note:
CR 22 cannot be connected to two or more inverters at the same time.

Introduction

Front Panel

Rear Panel

CR-22 Menu Maps

Connect with SC
SHORE power .

Select SHORE power and press Enter B utton as frame below

UNIT readings

UNIT setup.

Connect with SPT
UNIT readings

UNIT setup.

REMOTE setting.

Lock Setting

1. Enter Lock Setting page
2. After choosing Yes, return to the main screen. REMOTE setting & UNIT setup will be locked
3. To unlock REMOTE setting & UNIT setup, please enter password”1224″
4. Press the Enter buttom then use Up buttom to select 0~9, Down button to move to the next password digit, Enter 1224 followed by Enter buttom

COTEK LFP ID Setting

1. long press the Up and Back buttons to enter the following screen
2. Press the Enter button to e nter the password. Use the Up button to select numbers 0 9, and the Down button to move to the next password digit. Default password “2209,” the display will show as follows.
3. After entering the password and press the Enter button, you will enter the fo llowing screen. Use the Up and Down buttons for ID selection. IDs 1 to 16 are available for selection.
4. After making the selection, press the Enter button. The display will show the word “OK,” as shown in the following image, indicating that the setting is successful.

Note: Only one battery can be selected for configuration at a time. It is not possible to configure two or more batteries (including two).

System Status Messages

UNIT LED indicator

Auto-setting

Once the CR 22 detects SC inverter and Cotek LFP battery, CR 22 will automatically set the charging Parameter

• Battery Type: CUSTOM MODE
• Bulk 14.3V
• Absorption 14.0V
• Float 13.8V
• Equalization = 13.8 V
• Charger rate: 100%
• Bulk Cha Time : 20.0HR
• Abs Cha Time : 10.0HR
• Equalization Disable

Battery low capacity warning

Under CR 22 and battery situation

1. When the battery capacity drops to 7%, the status LED on CR 22 will turn orange, indicating LFP 7% with a flashing pattern
2. When the battery capacity reaches 5%, LFP 5% will flash, and the CR 22 status will initiate a shutdown within 20 seconds
3. Once the battery is recharged to 6% capacity, the CR 22 can be switched on. The LED will turn orange, and LFP 6% will flash
4. Once the battery is charged back to 8% capacity, the CR-22 will return to its normal status

Under CR-22,SC series ,and battery status

1. When the battery capacity reaches 7%, the status LED on CR-22 will turn orange and display LFP 7% with a flashing pattern. The SC output will shut down
2. Upon reaching 5% capacity, LFP 5% will flash, and the CR-22 status will initiate a shutdown within 20 seconds
3. Once the battery is recharged to 10% capacity, both CR-22 and SC will return to their normal status

Troubleshooting

Contact

• No.33, Sec. 2, Renhe Rd., Daxi Dist.., Taoyuan City 33548, Taiwan
• Phone: +886-3-3891999
• FAX: +886-3-3802333
• http://www.cotek.com.tw
• 2025.04

FAQ

• Q: Can I connect CR-22 to multiple inverters simultaneously?
  • A: No, CR-22 cannot be connected to two or more inverters at the same time. It should be connected directly to each inverter/charger individually.

Documents / Resources

COTEK CR Series Inverter Charge Controller [pdf] User Manual CR Series, CR Series Inverter Charge Controller, Inverter Charge Controller, Charge Controller, Controller

References

• User Manual