FSP EssenSolar CFS model User Manual
www.fsp-group.com.tw
31
TROUBLE SHOOTING
Problem
LCD/LED/Buzzer
Explanation / Possible cause
What to do
Unit shuts down
automatically
during startup
process.
LCD/LEDs and buzzer
will be active for 3
seconds and then
complete off.
The battery voltage is too low
(<1.91V/Cell)
1. Re-charge battery.
2. Replace battery.
No response after
power on.
No indication.
1. The battery voltage is far too
low. (<1.4V/Cell)
2. Internal fuse tripped.
1. Contact repair center for
replacing the fuse.
2. Re-charge battery.
3. Replace battery.
Mains exist but
the unit works in
battery mode.
Input voltage is
displayed as 0 on the
LCD and green LED is
flashing.
Input protector is tripped
Check if AC breaker is tripped
and AC wiring is connected well.
Green LED is flashing. 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.
(UPS
Appliance)
Green LED is flashing. 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.
LCD display and LEDs
are flashing
Battery is disconnected.
Check if battery wires are
connected well.
Buzzer beeps
continuously and
red LED is on.
Fault code 07
Overload error. The inverter is
overload 105% and time is up.
Reduce the connected load by
switching off some equipment.
If PV input voltage is higher than
specification, the output power
will be derated. At this time, if
connected loads is higher than
derated output power, it will
cause overload.
Reduce the number of PV
modules in series or the
connected load.
Fault code 05
Output short circuited.
Check if wiring is connected well
and remove abnormal load.
Temperature of internal
converter component is over
120°C.
Check whether the air flow of the
unit is blocked or whether the
ambient temperature is too high.
Fault code 02
Internal temperature of inverter
component is over 100°C.
Fault code 03
Battery is over-charged.
Return to repair center.
The battery voltage is too high.
Check if spec and quantity of
batteries are meet requirements.
Fault code 01
Fan fault
Replace the fan.
Fault code 06/58
Output abnormal (Inverter
voltage below than 190Vac or is
higher than 260Vac)
1. Reduce the connected load.
2. Return to repair center
Fault code
08/09/53/57
Internal components failed.
Return to repair center.
Fault code 51
Over current or surge.
Restart the unit, if the error
happens again, please return to
repair center.
Fault code 52
Bus voltage is too low.
Fault code 55
Output voltage is unbalanced.
Fault code 59
PV input voltage is beyond the
specification.
Reduce the number of PV
modules in series.
