PowerWalker VFI 1000RT LCD Manuel page 34

8. Trouble Shooting
If the UPS system does not operate correctly, check the operating status on
the LCD display.
EN
Warning
Site fail
Fan fail
Battery over voltage (over
charged)
Battery low
Charge fail
Inverter temperature high
Ambient temperature high
Battery open
Overload
EPO
Battery fault
If the UPS system does not operate correctly, please attempt to solve the
problem using the table below.
Problem
No indication, no
warning tone even
though system is
connected to mains
power supply
Display Mode
string "STbY" in
LCD, even though
the power supply is
available
Display Mode
string "bATT" in
LCD, and audible
alarm sounding
every 1 beep in
every 4 seconds
Emergency supply
period shorter than
nominal value
Fan fail
30
String
SITE
FANF
HIGH
bLOW
CHGF
TEPH
AMbH
bOPN
OVLD
EPO
bATF
Pzle cause
No input voltage
Inverter not switched on
Mains power supply
has failed, or Input
power and/or frequency
are out of tolerance
Batteries not fully
charged / batteries
defect
Fan abnormal
Fault
Inverter short
Overload fault
Inverter soft start fail
Bus soft start fail
Over temperature fault
Inverter voltage low
Inverter voltage high
Bus voltage over
Bus voltage Low
Bus voltage unbalance
Bus short
NTC open
Remedy
Check building wiring socket
outlet and input cable.
Press On-Switch "I".
Switching to battery mode
automatically.
Check input power source and
inform dealer if necessary.
Charge the batteries for at least
5 - 8 hours and then check
capacity. If the problem still
persists, consult your dealer.
Check if the fan is running
String
SHOR
OVLD
ISFT
bSFT
OVTP
INVL
INVH
bUSH
bUSL
bUSE
bUSS
NTCO