Introduction
Thank you for choosing Qoltec. We are confident that this AC-DC charger will meet your expectations. This manual provides instructions for installation and use, including important safety guidelines for proper operation. For any questions, please contact our customer service department.
Safety Instructions
- The device is intended for indoor use only and must not be used near flammable materials.
- Never allow sparks or flames near the battery, as explosive gases can be produced during normal operation.
- Use the device only with its rated voltage and frequency.
- When routing cables through walls with sharp edges, always use protective conduits or cable channels to prevent damage.
- Keep children away from the device.
- Do not expose the device to water.
- Ensure that the air intake and outlet openings are unobstructed.
- Be careful not to reverse battery connection polarity.
- Do not charge batteries not designed for charging.
- Disconnect the power supply before making or breaking connections with the battery.
WARNING! Risk of electric shock! Do not open the device while connected to the mains power supply. This equipment complies with CE standards and applicable directives.
NOTE: Batteries degrade over years of use. Annual maintenance is recommended. After several years, batteries should be serviced by a qualified technician to prevent fire hazards or other safety risks from damaged batteries.
Charging Instructions
1. Connecting the Charger to the Battery
Refer to Figure 1 for charger connections.
- Set the ON/OFF switch to the OFF position.
- Disconnect the AC power cord. Connect the black cable to the terminal marked with (-) on the charger side. Connect the other end of the cable to the negative terminal of the battery.
- Connect the red cable to the terminal marked with (+) on the charger side. Connect the other end of the cable to the positive terminal of the battery.
2. Turning on the Charger
- Connect the AC power cord to the charger and to the mains socket.
- Set the ON/OFF switch to the ON position.
- The charger's front panel features a control panel for selecting charging modes suitable for different battery types: STD, GEL, AGM, CAL, and LIFEPO4. This allows users to easily adjust the charging process for specific battery types, ensuring optimal performance and extending battery life. The charger also has an LED indicator for the current charging stage: FLOAT (battery charging), ABS (absorption charging), or BULK (main charging).
3. Turning off the Charger
- Disconnect the AC power cord from the mains socket.
- Set the ON/OFF switch to the OFF position.
- Disconnect the charger terminals from the battery.
Three-Stage Charging
- Stage 1 (Bulk): This stage maximizes battery charging by accelerating the cycle. The 'BULK' LED indicates the device is providing maximum charging current, stimulating energy absorption in a weak battery.
- Stage 2 (Absorption): When the battery reaches approximately 90% of its nominal capacity, the charger switches to 'ABSORPTION' mode. The device maintains a constant voltage to the battery with reduced current.
- Stage 3 (Float): Once the 90% charge level is reached, the 'ABSORPTION' indicator turns off, and the 'FLOAT' indicator lights up. In 'FLOAT' mode, charging current is reduced, and voltage remains constant. The battery is now in a constant charging 'FLOAT' mode.
Technical Specifications
Models: 51955, 51956, 51957, 51958, 51959 (12V)
| Parameter | 51955 | 51956 | 51957 | 51958 | 51959 |
|---|---|---|---|---|---|
| Input Voltage | 180-260 VAC-50 Hz | ||||
| Battery Voltage | 12V | ||||
| Bulk/Absorption Charge | 14.2-15VDC | ||||
| Float Charge | 13.2-13.8 VDC | ||||
| LiFePO4 Charge | 14.7 V +/- 0.1 VDC | ||||
| DC Output Current | 30A | 40A | 50A | 10A | 20A |
| Operating Temperature | 0-40°C | ||||
| Ventilation | Cooling fan, thermal control | ||||
| Output Ripple | <50 mA at full load | ||||
| Efficiency | 88% | ||||
| Load Control | 1.5% of output current: from no load to full load | ||||
Models: 51952, 51953 (24V)
| Parameter | 51952 | 51953 |
|---|---|---|
| Input Voltage | 180-260 VAC-50Hz | |
| Battery Voltage | 24V | |
| Bulk/Absorption Charge | 28.8-29.6 VDC (AGM, GEL) 28.4-29.2 VDC (LiFePO4) | 28.8-29.6 VDC (AGM, GEL) 28.4-29.2 VDC (LiFePO4) |
| Float Charge | 27.0-27.6 V (AGM, GEL) 27.2-27.6 V (LiFePO4) | 27.0-27.6 V (AGM, GEL) 27.2-27.6 V (LiFePO4) |
| DC Output Current | 10A | 20A |
| Operating Temperature | 0-40°C | |
| Ventilation | Cooling fan, thermal control | |
| Output Ripple | <50 mA at full load | |
| Efficiency | 88% | |
| Load Control | 1.5% of output current: from no load to full load | |
Models: 51916, 51917, 51918, 51919 (12V)
| Parameter | 51916 | 51917 | 51918 | 51919 |
|---|---|---|---|---|
| Input Voltage | 180-260 VAC-50 Hz | |||
| Battery Voltage | 12V | |||
| Bulk/Absorption Charge | 14.2-15 VDC (selectable) | |||
| Float Charge | 13.2-13.8 VDC (selectable) | |||
| LiFePO4 Charge | 14.7 V +/- 0.1 VDC | |||
| DC Output Current | 60A | 70A | 80A | 90A |
| Operating Temperature | 0-40°C | |||
| Ventilation | Cooling fan, thermal control | |||
| Output Ripple | <50 mA at full load | |||
| Efficiency | 88% | |||
| Load Control | 1.5% of output current: from no load to full load | |||
Troubleshooting
| Status | Possible Cause | Recommended Action |
|---|---|---|
| No DC output or charger cannot be started | No AC input | Check power source. |
| Overheating shutdown | Wait for the device to cool down. | |
| Poor terminal contact | Check connection between charger and battery; ensure correct polarity. | |
| Battery terminal contact or polarity reversed | (Covered by above) | |
| Output short circuit | Check fuse. | |
| Battery charging is unstable | Unstable AC input voltage | Check AC input voltage; ensure it is within range. |
| Setting does not match battery type | Select the correct battery TYPE. | |
| Charger cannot switch to 'FLOAT' mode | Cable connected to battery is too thin. | Replace cable with a correctly sized cable. |
| Battery is too weak. | (This may affect charging speed, not necessarily float mode switch) | |
| Battery is in poor condition. | Replace battery with a new one. |
Maintenance
- Use the device in a well-ventilated area.
- Avoid charging batteries at very cold or high temperatures.
- Regularly check cables and connectors for damage.
Disposal
Take used devices to an electrical waste collection point. Do not dispose of the device with household waste.
Warranty
The device comes with a 24-month warranty from the date of purchase, covering repair or replacement for manufacturing defects. Proof of purchase (receipt or invoice) is required for warranty claims. The warranty does not cover damage resulting from improper use, incorrect installation, or unauthorized modifications. For service, contact an authorized service center for professional diagnostics and repair. Only qualified personnel should perform maintenance to ensure device safety and proper operation. For warranty or maintenance questions, please contact the customer service department.
Diagram Description
Figure 1 shows the rear panel of the charger. It features an 'AC IN' socket for power connection and an ON/OFF switch with 'ON' and 'OFF' positions.
