Ps-855b Maintenance Manual [upd]
Check external load for short circuits or excessive current draw. Loose transformer laminations Tighten the primary transformer mounting bolts securely. 5. Storage and Environmental Tolerances
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:
Ensure that the unit passes self-tests (if equipped) or that indicators show a charged state. 3. Battery Maintenance and Charging
Twist or pry open the fuse cap using a flat-head screwdriver. ps-855b maintenance manual
Emergency Power Supply Maintenance & Troubleshooting. 2. Preventive Maintenance and Inspection Procedures
Disconnect all primary and auxiliary power sources connected to the PS-855B.
The or version number listed on the PCB
| Symptom | Probable Cause | Corrective Action | | :--- | :--- | :--- | | | 1. Wiring incorrect 2. Setpoint set too high 3. Diaphragm ruptured | 1. Verify wiring diagram. 2. Adjust setpoint screw. 3. Replace unit. | | Intermittent signal | 1. Loose terminal connection 2. Excessive vibration | 1. Tighten terminal screws. 2. Isolate switch from vibration source. | | Leakage at connection | 1. Loose fitting 2. Damaged threads | 1. Tighten fitting. 2. Re-tape threads or replace fitting. | | Housing filled with fluid | 1. Ruptured diaphragm | 1. Replace unit immediately. Do not attempt repair. |
Slide the top cover back onto the chassis frame, aligning screw holes precisely.
Wrap the device in an anti-static bag and place it inside a heavy-duty padded shipping container. Check external load for short circuits or excessive
The table below provides the core specifications for the unit:
Ensure power is disconnected before servicing electrical components.
The PS-855B is a robust, electromechanical pressure switch designed to monitor system pressure and open or close an electrical circuit when a preset pressure point is reached. It is suitable for use with air, hydraulic fluids, oils, and non-corrosive gases. Storage and Environmental Tolerances It is important to
