CTEK D250SA User Manual

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EN
MANUAL
CONGRATULATIONS
on the purchase of your new CTEK charger providing professional battery care. This charger is
included in a series of professional chargers from CTEK SWEDEN AB and represents the latest
technology in battery charging. With the CTEK D250SA and SMARTPASS 120 you can be sure of
getting maximum performance from your dual battery system.
SAFETY
CALIFORNIA PROPOSITION 65
WARNING: This product contains chemical known to the state
of California to cause cancer or reproductive toxicity.
• The D250SA and SMARTPASS 120 have been developed for 12V lead-acid batteries. Do not use
the unit for any other type of battery.
• Wear protective goggles when connecting and disconnecting batteries.
• Battery acid is corrosive. Rinse with plenty of water immediately if you get acid on your skin or in
your eyes. Get medical assistance.
• Never use a charger with damaged electric cables. Check that the cables have not been dama-
ged by hot surfaces, sharp edges or in any other way.
• Explosive gases are generated while lead-acid batteries are being charged. Avoid any sparking
near the battery. Use in a well-ventilated location.
• Never place the charger above the battery, and avoid covering the charger during charging.
• Disconnect the battery terminal posts before installing.
• The D250SA and SMARTPASS 120 are not spark-free.
• The installation must include a fuse in accordance with the recommendations in the table
”CABLE AND FUSE RECOMMENDATIONS”.
WARNING!
The D250SA and
SMARTPASS 120 are not
protected against reversed
polarity.
Remember that all installations in boats must comply with ISO 10133!
1. The cabling from the batteries must have fuses near the batteries.
2. The batteries must be securely fastened in a ventilated space.
3. The cabling must be run through pipe ducting, separately from 230V/110V wiring (mains power),
or secured by clips at every 30 cm/1 ft.
4. Cabling in the engine compartment must be temperature rated at 70C/ 158F.
Temperature sensor 2 m/6 ft.
Smart alternator cable (red) 0.2 m/0.6 ft.
AGM Cable (black)
0.2 m/0.6 ft.
SMARTPASS 120
+OUT
+OUT
+IN
Negative cable connection (M8) 0.3 m/1 ft.
Connector plate
D250SA
SMARTPASS 120
Temperature sensor 2 m/6 ft.
+IN
Input Alternator
+OUT
Output Service battery
+IN
Input Alternator
+OUT
Output Service battery
+IN
Input Solar panel Earth Connection
+OUT
Output Consumers

CTEK D250SA Specifications

General

Charging Current	20 A
Operating Temperature	-20°C to +50°C
Protection Class	IP65
Battery Capacity	40–300 Ah
Battery Types	AGM, GEL, Ca/Ca
Charging Stages	5
Protection Features	Over temperature, Over voltage, Reverse polarity
Input Voltage	11.5-23V, DC

Summary

Safety Precautions

California Proposition 65 Warning

Product contains chemical known to cause cancer or reproductive toxicity.

Product Overview

D250SA and SMARTPASS 120

Introduces the D250SA and SMARTPASS 120 for dual battery systems.

Function Indicators and Cable Recommendations

D250SA & SMARTPASS 120 Indicators

Explains LED indicators for charging status on both units.

Cable and Fuse Recommendations

Provides guidelines for cable sizing and fuses for D250SA and SMARTPASS 120.

Installation and Mounting

Installation Guide and Torques

Step-by-step installation guide and recommended tightening torques for the apparatus.

Settings, Connections, and Symbols

D250SA Settings and Connections

Configuration options for D250SA and connection diagrams for both units.

Manual Symbols Explained

Explains common symbols used in the manual.

Installation Examples

Solar Panel and Small Service Battery Setups

Illustrates common dual battery system configurations with solar and alternator.

Advanced Installation Scenarios

Parallel Consumers and Alternator Charging

Examples for managing parallel consumers and charging with alternators.

System Expansion Examples

Large Service Batteries and AC/DC Charging

Examples for larger systems and integration with AC/DC chargers.

D250SA Charging Program Stages

Troubleshooting: Fault Indications

D250SA Faults and Solutions

Explains fault codes and recommendations for the D250SA unit.

SMARTPASS 120 Faults and Solutions

Explains fault codes and recommendations for the SMARTPASS 120 unit.

Technical Specifications

Warranty and Support Information