Xtreme Power Conversion P91g Series Guide

P91 / P91g Lead Acid Online UPS
1000VA, 2000VA, 3000VA Models
User & Installation Manual
www.xpcc.com | © 2021 Xtreme Power Conversion Corporation. All rights reserved. (Rev 10/21/21)

P91 Lead Acid 2U User’s Manual Uninterruptible Power Supply
Table of Contents
1. Important Safety Warning ..........................................................................................................1
1-1. Transportation........................................................................................................................... 1
1-2. Preparation ............................................................................................................................... 1
1-3. Installation ................................................................................................................................ 1
1-4. Operation .................................................................................................................................. 2
1-5. Maintenance, service and faults............................................................................................... 2
2. Installation and s e tup .................................................................................................................4
2-1. Rear panel view......................................................................................................................... 4
2-2. Operating principle ................................................................................................................... 6
2-3. Install the UP S........................................................................................................................... 6
2-4. Setup the UPS ........................................................................................................................... 7
2-5. Battery Replacement .............................................................................................................. 11
2-6. Battery Kit Assem bl y ............................................................................................................... 12
3. Operations ............................................................................................................................... 15
3-1. Button operation..................................................................................................................... 15
3-2. LCD Panel ................................................................................................................................ 15
3-3. Audible Alarm ......................................................................................................................... 16
3-4. LCD display wordings index..................................................................................................... 17
3-5. UPS Setting.............................................................................................................................. 18
3-6. Operating Mode Description .................................................................................................. 22
3-7. Faults Reference Code ............................................................................................................ 23
3-8. Warning indicator ................................................................................................................... 23
4. Troubleshooting ....................................................................................................................... 24
5. Storage and M aint e na nce......................................................................................................... 25
6. Specifications ........................................................................................................................... 26
7. Obtaining Service ..................................................................................................................... 28
8. Xtreme Power Conversion Limited W a rr anty ............................................................................. 29
9. Xtreme Power Conversion Load Protection Policy ..................................................................... 31
Xtreme Power Conversion Corporation

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 1
1. Important Safety Warning
SAVE THESE INSTRUCTIONS - This manual contains important instructions that should be followed
during installation and maintenance of the UPS and batteries.
Please comply with all warnings and operating instructions in this manual strictly. Do not operate this
unit before reading through all safety information and operating instructions carefully.
1-1. Transportation
Please transport the UPS system only in the original package to protect against shock and
impact.
1-2. Preparation
Condensation may occur if the UPS system is moved directly from cold to warm
environment. The UPS system must be absolutely dry before being installed. Please allow
at least two hours for the UPS system to acclimate to the environment.
Do not install the UPS system near water or in moist environments.
Do not install the UPS system where it would be exposed to direct sunlight or near heater.
Do not block ventilation holes in the UPS housing.
1-3. Installation
Do not connect appliances or devices which would overload the UPS system (e.g. laser
printers) to the UPS output sockets.
Place cables in such a way that no one can step on or trip over them.
Do not connect domestic appliances such as hair dryers to UPS output sockets.
The UPS can be operated by any individuals with no previous experience.
Connect the UPS system only to an earthed shockproof outlet which must be easily
accessible and close to the UPS system.
Please use only VDE-tested, CE-marked (for P91g models or UL-marked for P91 models)
mains cable (e.g. the mains cable of your computer) to connect the UPS system to the
building wiring outlet (shockproof outlet).
Please use only VDE-tested, CE-marked (for P91g models or UL-marked for P91 models)
power cables to connect the loads to the UPS system.
When installing the equipment, it should ensure that the sum of the leakage current of the
UPS and the connected devices does not exceed 3.5mA.
Temperature Rating - Units are considered acceptable for use in a maximum ambient of
40°C (104°F).
For Pluggable Equipment - The socket-outlet shall be installed near the equipment and shall
be easily accessible.
CAUTION: The unit is heavy. Lifting the unit requires a minimum of two people.
Batteries with minimum case flame rating V-2 are intended for use in a computer room as
defined in the Standard for the Protection of Information Technology Equipment,
ANSI/NFAP 75. Batteries with case flame rating HB are not intended for use in a computer
room. (US installations only.)

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 2
1-4. Operation
Do not disconnect the mains cable on the UPS system or the building wiring outlet
(shockproof socket outlet) during operations since this would cancel the protective
earthing of the UPS system and of all connected loads.
The UPS system features its own, internal current source (batteries). The UPS output
sockets or output terminals block may be electrically live even if the UPS system is not
connected to the building wiring outlet.
In order to fully disconnect the UPS system, first press the OFF/Enter button to turn off the
unit.
Prevent fluids or other foreign objects from inside of the UPS system.
The EPO and USB circuits are an IEC 60950-1 safety extra low voltage (SELV) circuit. This
circuit must be separated from any hazardous voltage circuits by reinforced insulation.
1-5. Maintenance, service and faults
The UPS system operates with hazardous voltages. Repairs may be carried out only by
qualified maintenance personnel.
Caution - risk of electric shock. Even after the unit is disconnected from the mains (building
wiring outlet), components inside the UPS system are still connected to the battery and
electrically live and dangerous.
Before carrying out any kind of service and/or maintenance, disconnect the batteries and
verify that no current is present and no hazardous voltage exists in the terminals of high
capability capacitor such as BUS-capacitors.
To avoid electrical shock, turn off the unit and unplug it form the AC power source before
servicing the battery
Only persons adequately familiar with batteries and with the required precautionary
measures may replace batteries and supervise operations. Unauthorized persons must be
kept well away from the batteries.
Caution - risk of electric shock. The battery circuit is not isolated from the input voltage.
Hazardous voltages may occur between the battery terminals and the ground. Before
touching, please verify that no voltage is present!
Caution - Do not dispose of batteries in a fire. The batteries may explode.
Caution - Do not open or mutilate batteries. Released electrolyte is harmful to the skin and
eyes. It may be toxic.
A battery can may cause a risk of electrical shock and high short-circuit current. The
following precautions should be observed when working on batteries:
a) Remove watches, rings, or other metal objects.
b) Use tools with insulated handles.
c) Wear rubber gloves and boots.
d) Do not lay tools or metal parts on top of batteries.
e) Disconnect charging source prior to connecting or disconnecting battery terminals.
f) Determine if battery is inadvertently grounded. If inadvertently grounded,remove source
from ground. Contact with any part of a grounded battery can re sul t in electrical shock.
The likelihood of such shock can be reduced if such grounds are removed during
installation and maintenance.

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 3
When changing batteries, install the same number and same type of batteries or battery
packs.
Please replace the fuse only with the same type and amperage in order to avoid fire
hazards.
Do not dismantle the UPS system.
WARNING: This is a category C2 UPS product. In a residential environment, this product
may cause radio interference, in which case the user many be required to take additional
measures. (only for CE models)
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
WARNING: Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 4
2. Installation and setup
NOTE: Before installation, please inspect the unit. Be sure that nothing inside the package is damaged.
Please keep the original package in a safe place for future use.
2-1. Rear panel view
P91g models:
1500 Model 2000 Model
3000 Model
P91 models:
1000/1500 Model 2000 Model
3000 Model
1. Programmable outlets: connect to non-critical loads.
2. Output receptacles: connect to mission-critical loads.
3. AC input
4. Network/Fax/Modem surge protection

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 5
5. USB communication port
6. RS-232 communication port
7. SNMP intelligent slot
8. Emergency power off function connector (EPO)
9. External battery connection
10. Output circuit breaker

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 6
DC-to-DC
Converter
Battery
2-2. Operating principle
The operating principle of the UPS is shown as below
Input
Output
EMI/RFI
Filters
Rectifier
/PFC
Dynamic
Bypass
Inverter
Battery
Charger
The UPS is composed of mains input, EMI/RFI filters, rectifier/PFC, inverter, battery charger, DC-to-DC
converter, battery, dynamic bypass and UPS output.
2-3. Install the UPS
This UPS can be either displayed on the desk or mounted in the 19”rack chassis. Please choose
proper installation to position this UPS.
Rack-mount Installation
Step 1 Step 2
UPS
To wer Installation
Step 1 Step 2 Step 3

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 7
Tower Installation with battery pack
Step 1 Step 2
2-4. Setup the UPS
Before installing the UPS, please read below to select proper location to install UPS.
1. UPS should be placed on the flat and clean surface. Place it in an area away from vibration, dust,
humidity, high temperature, flammable liquids, gas, corrosive and conductive contaminants.
Install the UPS indoors in a clean environment, where it is away from window and door. Maintain
minimum clearance of 100mm in the bottom of the UPS to avoid dust and high temperature.
2. Place UPS:
It’s equipped with fan for cooling. Therefore, place the UPS in a well-ventilated area. It’s required to
maintain minimum clearance of 100mm in the front of the UPS and 300mm in the back and two sides
of the UPS for heat dissipation and easy-maintenance.
Step 1: External battery connection
For safety consideration, the UPS is shipped out from factory without connecting battery wires.
Before connecting to external batteries, it’s required to have the internal battery wire disconnected.
Follow the below steps to make external battery connection.
1. Turn off UPS and remove power plug from the mains.
2. Remove front panel and disconnect internal battery wire.

P91 Lead Acid 2U User’s Manual
Uninterruptible Power Supply
Xtreme Power Conversion Corporation
Page 8
3. Remove the cover of the external battery connector by using a screwdriver.
4. Plug the battery cable into the external battery connector of the UPS and
the battery pack(s).
Note: If you have multiple battery packs available, connect them serially. An example is shown
in the diagram below (connecting the second battery connector of the first battery pack to the
first battery connector of the second battery pack).
UPS Battery
pack #1
Battery
pack #2
5. Stabilize the connector to the UPS and the battery pack(s) by fixing screws as shown below
diagram.
6. Connect internal battery connector and put the front panel back to the unit.