The manual provides operation, installation, troubleshooting, safety and maintenance instructions for the DH-UPS-D DC UPS.
This user manual describes the DH-UPS-D DC uninterruptible power supply, covering its main purpose, technical specifications, safety requirements and component functions. It explains the system’s charging, power supply and output conversion modules and their operating principles.
The guide also details step‑by‑step procedures for safe operation, installation, commissioning, fault analysis, and regular maintenance, including battery and fan care, to ensure reliable long‑term performance. This manual is written in Chinese.
| Input voltage | AC220V±10% (single/three‑phase), AC380V±10% (three‑phase), AC440V±10% (three‑phase) |
|---|---|
| Output voltage | DC24 V |
| Charging voltage | DC28 V (constant‑voltage, limited‑current) |
| Battery maintenance interval | Every 4–6 months, each charge ≥ 4 h (shorter in high‑temperature environments) |
Check that the AC input power is connected and the load wiring is correct, then close the input power switch and the battery switch; the UPS will start operating.
Ensure the UPS is powered off, verify no dangerous voltage with a multimeter, remove conductive accessories, and follow the listed safety procedures.
Check the fan regularly for blockage or damage and replace it promptly if it stops working.