Troubleshooting - Phocos Any-Grid Series User And Installation Manual

11.0 Troubleshooting

Problem
Unit shuts down
automatically during
start-up process.
No response after
power on.
AC source exists but
the unit works in
battery mode.
When the unit is
turned on, internal
relay is switched on
and off repeatedly.
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LCD / LED / Buzzer Explanation / Possible cause
LCD / LEDs and
The battery voltage is too low
buzzer will be active
(< 45.84 V / < 22.92 V for the 48
for 3 seconds and
V / 24 V model)
then turn off.
1. The battery voltage is far too
low (< 33.6 V / < 16.8 V for the
48 V / 24 V model)
No indication.
2. Battery polarity is connected
in reverse
Input voltage is
displayed as 0 on the
Input circuit breaker is tripped
LCD and green LED is
flashing.
Insufficient quality of AC power
Green LED is flashing.
(Grid or Generator)
"Solar / PV First" is set as the
Green LED is flashing. priority of the AC output
source.
LCD display and LEDs
Battery is disconnected.
are flashing
What to do
1. Re-charge battery
2. Replace battery
1. Check if batteries and the
wiring are connected correctly,
check battery polarity.
2. Re-charge battery.
3. Replace battery.
Check if AC circuit breaker is
tripped and AC wiring is
connected correctly.
1. Check if AC wires are too thin
and/or too long.
2. Check if generator (if applied)
is working correctly or if input
voltage range setting is correct
(try switching from UPS mode 
Appliances mode), see chapter
"Device Operation Settings" 
"Settings menu 03" for details.
Change output source priority to
"AC input / utility first", see
chapter "Device Operation
Settings"  "Settings menu
01" for details.
Check if battery wires are well
connected.
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