Troubleshooting
39
3/3
UPS Status
LCD Indication
LED Status
Countermeasure
The UPS does not switch
from bypass power
supply to UPS power
supply (inverter power
supply).
- -
When “Auto” is set in “Setting frequency” in the LCD panel setting menu:
Is the UPS in a state of asynchronous operation? The UPS cannot switch
from bypass power supply to UPS power supply during asynchronous
operation. See “§2 Viewing UPS Information” in the LCD Panel Operating
Manual, and check the UPS operation status.
When “50 Hz” or “60 Hz” is set in “Setting frequency”:
The UPS cannot switch from bypass power supply to UPS power supply
when the input frequency is not within the specified tracking range (±1%,
±3%, or ±5%) set in “§3.2 Setting Synchronous Frequency Tracking
Range.” Check the input frequency.
Check that the forced bypass switch
Forced Bypass
is set to “Inverter.”
The forced bypass switch
Forced Bypass
is located inside the front
panel of the UPS. Remove the front panel to check the switch. See step
⑩
in “§6.2 Installing the Battery Packs and Attaching the Front Panel.” If
the forced bypass switch is set to “Bypass,” set it to “Inverter” and then
press
again to switch to UPS power supply.
If “Overload Recovery Operation” in the LCD panel setting menu is set to
“Auto Ret BYP,” the UPS switches to bypass power supply when there is
an overload, and after a certain period of time has elapsed, switches back
to UPS power supply automatically. If the overload condition persists, the
UPS switches to bypass power again, and this cycle is repeated. See Ҥ3.10
Setting Overload Recovery Operation” in the LCD Panel Operating
Manual.
If “Overload Recovery Operation” in the LCD panel setting menu is set to
“Stay on BYP,” bypass power supply continues when the overload
condition continues. When the overload conditions is resolved, the UPS
switches to UPS power supply.
If the voltage of the utility power supply is low and the load current is at or
below the overload detection threshold when the UPS switches to bypass
power supply, the UPS continues to switch between UPS power supply and
bypass power supply. See “§3.10 Setting Overload Recovery Operation” in
the LCD Panel Operating Manual.
The device connected to
the external interface
section does not work.
- -
Is the interface cable between the UPS Units connected to the back of the
UPS Units properly?
If this cable is not connected, the external interface section will not work.
See “§6.3.1 Wiring Between UPS Units,” and connect the interface cable
properly.
When using the power
management software
(option), serial
communication fails.
- -
Is “Interface” in the LCD panel setting menu set to “WS” (work station)?
See “§3.5 Setting PC Interface” in the LCD Panel Operating Manual. The
default setting is “WS” (work station).
Is “Serial baud rate” in the LCD panel setting menu set properly? See
“§3.6 Setting Baud Rate” in the LCD Panel Operating Manual. The default
setting is “9600 bps.” Set the same setting value as that of the power
management software.
Is the communication cable connected properly? Connect the computer
and UPS properly.
When the power recovers
after the UPS has shut
down due to battery
exhaustion during a
power outage, the UPS
does not start
automatically.
- -
Check the settings of “UPS Operation Upon Power Recovery” in the LCD
panel setting menu. If it is set to “STOP,” the inverter will not start
automatically.
If it is set to “BATT>30%,” “BATT>50%,” or “BATT>80%,” the UPS will not
start until the batteries are charged to the specified level. The default
setting is “Auto.” See “§3.7 Setting UPS Operation Upon Power Recovery”
in the LCD Panel Operating Manual.
The UPS does not start
automatically at the time
set for scheduled
operation in the power
management software
(option).
- -
If “When power failure recovered, automatically start the UPS” of the
“Configuring the UPS control conditions” item described in the User Guide
of the power management software is selected and a value between “10
and 90” is set for the specified value (%), the UPS will not start even at a
scheduled start time if the batteries are not charged to the specified value.
When scheduling operation for the UPS, set this specified value (%) to “0.”
For details, see “Setting the Shutdown Conditions” in the User Guide of
the power management software.
“Red
ALARM
” of one UPS
Unit turned on.
-
Red ALARM of
one UPS Unit
The UPS for which “Red ALARM” is on has malfunctioned.
Contact your sales representative or SANYO DENKI.
Normally operating UPS Unit will continue running. In such a case, power
supply may be repeatedly switched between bypass power supply and
inverter power supply.
See the “The UPS does not switch from bypass power supply to UPS power
supply” item in “§11. Troubleshooting.”
“Red
ALARM
” turned on.
- Red
ALARM
When there is a power outage, “Red ALARM” turns on if the battery is
exhausted.
In cases other than the above, the UPS has malfunctioned.
Contact your sales representative or SANYO DENKI.
If the UPS does not operate normally even if you perform the countermeasures above, or if any other trouble occurs or
you think there is a malfunction, contact your sales representative or SANYO DENKI.
Note
