38
3.7.6 UPS Is Off Due to Unknown Reason
3.7.6.1 If a serious abnormal condition occurred, the UPS will lock it itself in the
“OFF” position as shown in drawing AA and a error message will be
displayed on the LCD screen.
3.7.6.2 After 3 seconds, all messages will be locked except the Bypass messages
(LED
& LCD
). If the utility voltage is abnormal after the UPS is
locked, the LED
will be extinguished and the LCD
will be
shown on the LCD screen.
3.7.6.3 Check the error messages then see section 4 to troubleshoot the problem
or see section 8 Obtaining Service. To unlock the UPS press the OFF
switch
for 5-seconds and the audible alarm will sound 2-beeps. Turn
Off the input circuit breaker on the rear panel of the UPS. The UPS will be
unlocked now, but the original problem may not be resolved, see section 8
Obtaining Service.
3.7.7 Turning Off the UPS
3.7.7.1 Press the Off switch
for approximately 5-seconds, the Inverter will
turned off, the UPS will transfer to the Bypass mode and the LCD screen
will display drawing B.
3.7.7.2 Turn Off the input circuit breaker on the rear panel of the UPS.
3.7.7.3 Turn Off the DC circuit breaker on the rear panel of the Battery Pack.
3.7.7.4 The UPS is OFF.
3.7.7.5 To completely de-energize the UPS, disconnect the battery cable from the
rear panel of the UPS. Turn Off the utility circuit breaker at the service
panel.
3.7.8 Maintenance Bypass Procedure
NOTE: Before performing the Maintenance Bypass procedure the two (2) RJ-
45 cables MUST be connected to the UPS module and the Isolation
Transformer module (see Section 3.6).
3.7.8.1 The Maintenance Bypass Switch is for the maintenance of the UPS
module only. The maintenance of the UPS module must be done by
QUALIFIED SERVICE PERSONNEL ONLY.
MINUTEMAN accepts no
liabilities and is not limited to: injury to the Service Personnel, or damages
to; the UPS system, or the connected equipment caused by the incorrect
servicing of the UPS system.
3.7.8.1.1
Press the Off switch
for approximately 5-seconds, the LCD screen
will display drawing B and the UPS will be in the Bypass mode.
3.7.8.1.2
Remove the Maintenance Bypass Switch cover from the Maintenance
Bypass Switch on the rear panel of the Isolation Transformer module.
39
3.7.8.1.3 Turn the Maintenance Bypass Switch to the “Bypass” position. The
LCD screen will display the maintenance sign
at the upper right-
hand corner of the LCD screen.
3.7.8.1.4
Turn off the UPS’s input circuit breaker on the rear panel of the UPS
module.
3.7.8.1.5 Unplug the L6-30P pigtail (UPS input) from the rear panel of the
Isolation Transformer module.
3.7.8.1.6
Unplug the L6-30P pigtail from the L6-30R pigtail.
3.7.8.1.7
Unplug the battery cable from the rear panel of the UPS module.
3.7.8.1.8 Unplug all of the communication and network cables from the rear
panel of the UPS module.
3.7.8.1.9
The UPS module maybe removed from service for maintenance.
3.7.8.1.10 Once the servicing of the UPS is complete, re-install the UPS.
3.7.8.1.11 Reconnect all of the communication and network cables.
3.7.8.1.12 Reconnect the battery cable.
3.7.8.1.13 Reconnect the L6-30P pigtail to the L6-30R pigtail.
3.7.8.1.14 Reconnect the L6-30P pigtail.
3.7.8.1.15 Turn on the UPS’s input circuit breaker.
3.7.8.1.16 Turn the Maintenance Bypass Switch to the “INV” position. The UPS
will transfer to the normal Bypass mode.
3.7.8.1.17 Press and hold the On Switch (on the front panel of the UPS) for
approximately 3-seconds, then release. The audible alarm will sound 2-
beeps. The UPS will perform its normal startup test. Once the startup is
complete the UPS will be in the normal On-Line mode.
NOTE:
If the Maintenance Bypass Procedure is not followed in the correct order
and step-by-step the UPS and/or the connected equipment could be damaged.
4 Communication Port, EPO Port and Option Cards
The communication port on the UPS provides RS232 communications for
remote monitoring and control.
4.1.
RS232 Communication Port:
Baud Rate
9600 bps
Data Length
8 bits
Stop Bit
1 bit
Parity
None
DB9 Pin 2
RS232 Tx
DB9 Pin 3
RS232 Rx
DB9 Pin 5
Ground
