UPS Troubleshooting chart
| PROBLEM | POSSIBLE CAUSE | ACTION to TAKE |
|---|---|---|
| UPS will not turn on. | 1. UPS Enable switch is in the off position or front panel switch not pressed. 2. UPS's input circuit breaker is tripped (button is extended). 3. Very low utility voltage or dead outlet. |
1. Turn on the rear panel UPS Enable switch. Press front panel switch to power UPS and loads. 2. Reduce the UPS's load by unplugging equipment and reset the circuit breaker (press button on the rear panel). 3. Check outlet with a table lamp. If very dim, have utility voltage checked by an electrican. |
| UPS operates on-battery even thought normal line voltage is thought to exist. | 1. UPS's input circuit breaker is tripped (button is extended). 2. Very high, low or badly distorted line voltage. |
1. Reduce the UPS's load by unplugging equipment and reset the circuit breaker (press button on rear panel). 2. Test the input voltage with UPS's Line voltage or bar graph. Inexpensive fuel powered generators can cause distorted line voltages- set Option switch 1 to the (I) position. |
| UPS 'beeps' occasionally. | This is normal. | The UPS is protecting your equipment from momentary sags or swells. |
| UPS beeps more than once or twice an hour. | Chronically high or distorted line voltage. |
Set Option switches 1 and 2 to match input voltage range. Alternatively, set Option switch 3 to the on (I) position. |
| UPS does not provide expected back up time. | 1. UPS's battery is weak due to recent utility outage or wear. 2. UPS is overloaded |
1. The UPS's battery require recharging follow. an extended outage. The batteries will wear faster when put into service often and when operating at elevated temperatures. 2. Check load using UPS's Output power bar graph. Unplug non critical equipment such as printers. |
| Indicators on the front panel flash in a 'marquee' fashion. | UPS has been shut down by computer software. | UPS will restart when AC power returns. |
| All indicators are illuminated and UPS emits constant tone. | Internal UPS fault. | Do not attempt to use UPS. Turn off UPS and have it serviced immediately. |
| Site wiring fault light is illuminated - UPS operates normally. | Building wiring error such as missing ground or hot-neutral reversal. | A qualified electrican should be summoned to correct the building wiring. |
| Low battery light is illuminated and on-line light is extinguished. | UPS is shut down and battery is discharged due to extended power failure. | UPS will return to normal operation when power is restored and battery has charged sufficiently. |
| Replace battery light is illuminated. | Weak battery. | Allow the batteries to recharge for at least 8 hours. If the problem persist after recharging, the batteries should be replaced. |
Computer Interface Port
A series of interface kits is available for operating systems that provide UPS monitoring.
Each interface kit includes the special interface required to convert status signals from the UPS into signals
which individual operating systems recognize.
Systems for which interface kits are offered include Novell, LAN Manager, LAN Server, LANtastic, Banyan VINES and
IBM AS/400.
The PowerChute software provides complete data protection. PowerChute is available for many platforms including
Novell, OS/2, AppleShare, XENIX, most UNIX-based oper. systems, and DEC VAX/VMS.
- Output at PINs 3, 5 and 6 are actually open collector outputs which must be pulled up to a common referenced supply no greater than +40V dc. The transistors are capable of a maximum non inductive load of 25mA dc. Use only Pin 4 as the common.
- The output at Pin 2 will generate a LO to HI RS-232 level upon transfer of the output load to power derived from the UPS's batterie. The pin is normally at a LO RS-232 level.
- The UPS will shut down when a HI RS-232 level, sustained for 4.5sec, is applied to PIN 1. The UPS responds to this signal, following a delay, only during mains failures (load is operating from the UPS's internal power source).
- An unregulated +24V dc appears at Pin 8 of the interface port whenever the UPS is powered. The supply is limited to 40mA dc maximum.
Normally Open
+--------------------o 3 --> Line Fail Signal
| Normally Open
| +----------------o 5 --> Low Battery Signal
| | Normally Closed
| | +------------o 6 --> Line Fail Signal
| | |
| | | ************ WARNING ***********
| | |
o o o !!! Do NOT USE 1-1 Cable to RS-232 !!!
\ \ |
o o o ************ WARNING ***********
| | |
+---+---+------+-----o 4 --> Common
RS-232 Shut Down |
Input --------+-----o 1 <--- HI input >= 4.5sec
RS-232 Line Fail |
Output --------+-----o 2 -->
Unregulated +24V dc |
Output --------+-----o 8 -->
|
+-----o 9 --> Chassis
DB-9 Female
DB-9 Female <--- CPU to UPS cable ----> DB-9 Male
6 7 8 9 9 8 7 6
o o-o o +----------------o o o o
o o o o o-------------+ 5 o o o o o
-|-|-|-|- - - - - - - - - - - - - - - - - - -|-|- - - shield
+-|-|-+ | | Frame - GND
| +-----------------------------------------+
+-----------------------------------------+
1 2 3 4 5 5 4 3 2 1
CPU - RS232 UPS
see >> SERIAL Port (RS-232)
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