When storing, the battery should be in a cool, dry place and recharged periodically to maintain capacity. 4. Troubleshooting and Repairs
Before performing any maintenance, the PS-855B maintenance manual emphasizes strict safety protocols to prevent injury or equipment damage.
Flag individual failing cells before the whole battery pack fails. ⚠️ Storage and Environmental Handling
| Specification | PS-855B | | --- | --- | | | 501-1712-02 | | OEM | L3Harris | | Output | 5.0 AMP, 5 VDC | | Input Power | 28 VDC, 15 Amps | | Battery Output Voltage | 24 to 28 VDC | | 5 VDC Converter | Adjustable +2.5 to 5.5 VDC, capable of delivering 25 watts | | Battery Output Current | Steady State Load: 10 Amps max | | Weight | 13.7 lbs (6.2 kg) max | | Dimensions | 7.820"H x 14.085"L x 2.400"W | | Amps/Hour | 5.0 Amp/Hour | | Environmental Qualification | DO-160C, Categories: [A2F2]-BB(C)E1XXXXSABABAWA[XXC3]XX | ps-855b maintenance manual
The difference between a power supply that gets scrapped and one that runs for another decade is often a single page in a . Whether you are a field service engineer, a hobbyist restoring industrial gear, or an in-house maintenance tech, the manual gives you the schematic truth—no guesswork, no myths.
, search for the numbers printed on the circuit board inside the device (e.g., PCB-855B ).
: The first place to check is the official website of the manufacturer. Most companies provide a support or downloads section where you can find manuals and other documentation for their products. When storing, the battery should be in a
It is important to note that modern lithium-ion emergency power supplies are now available as direct replacements for the PS-855 series. These alternatives offer significant advantages:
| Interval | Action | Tool Required | |----------|--------|----------------| | Monthly | Log output voltages under load | Multimeter | | Quarterly | Thermal imaging of transformer and switching MOSFETs | IR thermometer or thermal camera | | Biannually | Clean fan and airflow vents | Compressed air | | Annually | Replace primary-side bulk capacitor (even if looks fine) | Soldering station, low-ESR capacitor | | 5 years | Replace all secondary-side electrolytic caps | Desoldering pump, capacitor kit |
This report provides a structural and procedural overview of the . The PS-855B (identified herein as the "Unit") is a high-performance Hydraulic Power Unit (HPU) used primarily in industrial mobile and stationary hydraulic applications. The manual serves as the definitive guide for installation, routine servicing, troubleshooting, and overhaul. Flag individual failing cells before the whole battery
If storing the PS-855B long-term, pack it in an anti-static bag with silica gel packets to prevent moisture buildup. Store in a climate-controlled area within specified storage temperatures. If you need help with a specific step, tell me:
Slowly turn the current knob clockwise until the display reads 2.00A .