MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
110/
139
Rev. 03
– 01/06//2018
•
Check the status of the digital inputs, M032 measure (please refer to the Programming Guide), in
particular:
Check the contacts of the key-operated selector switches on the DC modules.
Check the status of the AC output circuit breaker feedback signal contacts.
•
When the switch is open RUN status is lost. Press START.
11.5.2. DC disconnection switch tripped
•
Check the polarity of the PV field poles.
•
Check if the emergency stop button has been pressed.
•
Check the status of the digital inputs, M032 measure (please refer to the Programming Guide), in
particular:
Check the contacts of the key-operated selector switches on the inverter door.
Check the status of the AC output switch feedback signal contacts.
•
When the disconnect switch is open RUN status is lost. Press START.
11.5.3. SPDs tripped or fuses blown
•
Make sure the DC disconnect switch is closed.
•
If the inverter is NOT equipped with the Earthed Optional: check that voltages are balanced in relation
to earth (max. allowable margin; 5% - 10%).
•
If the inverter is equipped with the Positive Earthed Optional: check that the positive pole voltage is
close to 0V.
•
If the inverter is equipped with the Negative Earthed Optional: check that the negative pole voltage is
close to 0V.
•
Open the DC disconnect switch.
•
If the inverter is NOT equipped with the Earthed Optional: check that voltages are balanced in relation
to earth (max. allowable margin; 5% - 10%).
•
If the inverter is equipped with the Positive Earthed Optional: check that the positive pole voltage is
close to 0V.
•
If the inverter is equipped with the Negative Earthed Optional: check that the negative pole voltage is
close to 0V.
•
If the inverter is equipped with the Earthed Optional check the earth polarization fuses. Please refer
to section 8.1.
11.5.4. Blown earth fuses for negative or positive earthed options
•
Check for any earth faults on the PV field. Proceed as described in section 11.5.3.
•
Check for any earth faults downstream from the AC output.
11.5.5. Replacing a fuse in the DC sections
To replace a fuse, proceed as follows:
•
Make sure that all the disconnect switches for the upstream strings are open: this is an essential
condition for ensuring that the fuses are free from voltage. Please remember that all fuses are parallel-
connected downstream, hence if just one string is powered the same voltage is present in all the
fuses.
•
Make sure that the inverter in the DC section being maintained is NOT running, i.e. that it is
STOPPED.
•
Open the disconnect switch on the DC side of the converter.
•
On the AC section, open the output switch related to the DC section where the damaged fuse needs
replacing.
