Cyber Power CPS5000ECH48 - 8 Troubleshooting Common Issues; Problem Diagnosis and Solutions

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8 Trouble Shooting
Table8-1
Problem
Explanation/
Possible cause
What to do
Unit shuts down
automatically during
startup process.
The battery voltage is too low
1. Re-charge battery.
2. Replace battery.
No response after power
on.
1. The battery voltage is far
too low.
2. Battery polarity is
connected reversed.
1. Check if batteries and the
wiring are connected well.
2. Re-charge battery.
3. Replace battery.
Mains exist but the unit
works in battery mode.
Input protector is tripped
Check if AC breaker is tripped
and AC wiring is connected well.
Insufficient quality of AC
power. (Shore or Generator)
1. Check if AC wires are too thin
and/or too long.
2. Check if generator (if applied)
is working well or if input
voltage range setting is correct.
(Appliance)
Set “Solar First” as the priority
of output source.
Change output source priority to
Utility first.
When the unit is turned
on, internal relay is
switched on and off
repeatedly.
Battery is disconnected.
Check if battery wires are
connected well.