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ZY120 1-3kVA User Manual EN rev.08.docx
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10.2 Adjust the factors caused the problem
When the fault indicator is on, press FUNC button to see the fault code and warn code. Fault
and warn codes are
listed as following:
Code
Event
Possible cause
Solution
7
Warn: Battery not
connected
Battery not connected
Check if battery switch is off or
battery cables are disconnected
10
Warn: EPO
Emergency power off
Short the EPO terminal 1&2 to
activate EPO
12
Warn:
Inverter
capacity
not
enough
/
/
16
Warn:
Input
voltage abnormal
Utility is failure
/
Input surge protector
opens
If utility is normal but rectifier is not
working, reset input surge protector
18
Warn: Line neutral
wires reversed/PE
not grounded
Input Line and neutral
is reversed
Check the polarity of line wire and
neutral wire
PE
wire
is
not
connected correctly in
UPS
Check if PE on input plug is shorted
with UPS rear panel. If not ,contact
with distributer or service center. If
yes, please check PE wire in input
power socket
20
Warn:
Bypass
voltage abnormal
Bypass voltage is out
of bypass range or is
off
Check if utility power is indeed out of
range.
24
Warn: Bypass over
load
Load is on bypass and
is overload
Remove some loads to ensure that
total loads is less than 95% of rated
capacity
26
Warn:
Bypass
overload timeout
Load is on bypass and
overload.
Overload
time is longer than the
overload capacity of
bypass.
UPS
will
shutdown output and
Remove some loads and restart UPS
again. When UPS is working
normally, turn on loads one by one.
