75
EN
SUNSYS PCS2 Power Conversion System and Storage from 33 to 200 kVA - Ref.: IOMSUNPCXX04-EN 01
15. WARNINGS AND TROUBLESHOOTING
The alarm messages offer immediate diagnosis of any faults, malfunctions or breakdowns in the batteries.
The following events are indicated:
• Warning: non-serious alarm condition that causes the unit stop. This can be reset automatically.
• Alarm: serious alarm conditions that cause the unit stop. These alarm conditions require a manual reset.
Alarm and warnings are divided into two categories:
• System Alarms/Warnings: these alarms/warnings relate to external parts of the unit (mains power network, output
line, ambient temperature). Corrective actions are activated by the user (system installer or operator) or by the
Support team.
• Unit Alarms/Warnings: these alarms/warnings relate to parts of the unit. Corrective actions are carried out by the
Support Service.
System warnings
Warning
Cause
Remedy
W01
Ambient over-temperature
The ambient temperature recorded
by the unit is over 45° (see values on
mimic panel).
Check the ventilation or air-condition-
ing system in the unit room.
W02
Ambient temperature
under the minimum thresh-
old
The ambient temperature recorded
by the unit is under 15° (see value on
mimic panel).
Check the ventilation or air-condition-
ing system in the unit room.
W04
Internal over-temperature
The temperature of the unit power
structure is over 110° (see value on
mimic panel).
Check the ventilation or air-condition-
ing system in the unit room.
W66
W20
High impedance to earth
The isolation controller and resistance
to earth values recorded are too high.
Check the protective fuses. If the
problem persists contact the support
service.
W21
(2)
Active Power reference too
low for charging batteries
The active power set point is too low
to charge battery.
Increase the value of active power set
point to allow correct battery charging
current.
W22
Battery Current Derating in
progress
Charge/discharge power is de-rated,
due to battery request.
Reduce the load.
W23
Battery fully discharged
Battery is fully discharged.
Recharge the battery.
W24
(2)
Battery Low Voltage
Battery cell voltage is critically low.
Recharge the battery.
W25
(2)
Battery Low Capacity
Battery charge is critically low.
Recharge the battery.
W26
(2)
Battery Rest Time request
Battery has to wait for the Rest Time
before charging/discharging.
Wait for the rest time.
W27
(2)
Battery Full Charge request
Battery requires a Full Charge before
discharging.
Full recharge of the battery.
W28
(2)
Battery Over-temperature
Battery temperature too high.
Reduce ambient temp.
W29
(2)
Calibration Procedure
request
Execution of Calibration procedure is
required.
Execute calibration procedure.
W30
(2)
Equalisation Procedure
request
Execution of Equalisation procedure is
required.
Execute equalisation procedure.
W31
Local Mode Enabled
ESS is locally controlled through HMI. Use HMI to control.
W32
General Battery Warning
Other battery warnings are present.
Solve the specific battery warning.
W33
AC input network outside
voltage on frequency range
Input network is missing or insufficient
(voltage and/or frequency values
incorrect with reference to the infor-
mation provided in the technical data
table).
Check for the disconnection of
protective devices upstream of the
unit.
Check the applied voltage and
frequency comply with the values set
on the HMI.
W34
W40
Low Insulation Resistance
Detection of low insulation resistance. Check the Insulation to earth.
W41
Insulation Sensor Fault
Insulation sensor feedback not
correct.
Check the Insulation Monitoring
Device is properly connected.
W42
(1)
Module 1 on Alarm
Module 1 stopped by alarm.
Check Module 1.
W43
(1)
Module 2 on Alarm
Module 2 stopped by alarm.
Check Module 2.