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MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
102/
139
Rev. 03
– 01/06//2018
10.8.2. Cabinet fans
On top of each DC module a fan unit is installed for air intake. In case of power supply loss, a warning
appears. A warning also appears in case of malfunctioning or slow speed of rotation of one of the fans.
If it is necessary to open the doors to carry out this inspection, proceed as follows:
•
STOP the inverter.
•
Make sure that the inverter is connected to both supply voltages (DC and AC) and that it is powered.
•
Make sure that key-operated selector switch 41SA1 is turned to DISABLED.
•
Open the doors.
The fans can be started up by gently heating the temperature sensor with a hairdryer.
At the end of inspection:
•
Close electrical cabinet doors.
•
Turn key-operated selector switch 41SA1 to ENABLED.
10.9.
Checking control and auxiliary voltages
DANGER
Electric shock and burns hazard: coming into contact with live PV field or grid
components can lead to serious injury and even death!
Do not touch any components other than those specifically indicated in the instructions.
To check the cabinet control and auxiliary voltages, follow the instructions provided below.
The exact position of the control points can be seen on the Electrical and Mechanical Diagram.
10.9.1. Checking 24Vdc
For 1100V models, 24Vdc auxiliary power supply is obtained both from 230Vac auxiliary power supply and
from the PV generator with separate power supply units. The 24vdc is checked to make sure that both power
supply units are properly operating. Checking 24Vdc may be overridden for inverter models with PV field
voltage ratings up to 1500Vdc, as the inverter is not started up in case of malfunction of the 230Vac/24Vdc
power supply unit.
To check the 24 Vdc power supply proceed as follows:
•
STOP the inverter.
•
Make sure that the inverter is connected to both supply voltages (DC and AC) and that it is powered.
•
Make sure that all the DC section displays come on.
•
Close the DC disconnect switch of the PV generator (11QM1) of all the DC modules.
•
Open the AC grid circuit breakers (30QM1 and 30QM2, if present).
•
Check if the display comes on on both the DC sections (at least 400Vdc field voltage is required).
10.9.2. Checking 48Vdc
48Vdc Auxiliary power supply powers the fans of the converter heatsinks.
If the 48V is not applied, a warning message is displayed on the DC sections.
10.9.3. 230Vac auxiliary power supply
To check the 110 Vac power supply proceed as follows:
•
STOP the inverter.
•
Make sure that the inverter is connected to the AC supply voltage and that it is powered.
•
Make sure that key-operated selector switch 41SA1 is turned to DISABLED.