SMA SC 400HE Installation - Manual (Page 93)

SMA Solar Technology AG Commissioning
Installation Guide SCxxxHE-IEN104432 93
7.2.7 Checking the Thermostat and Hygrostat Settings
The device contains adjustable thermostats for controlling the switch cabinet ventilators and the over-
temperature shut-off system. The heating system is controlled by an adjustable hygrostat. All
thermostats and hygrostats are pre-adjusted before delivery.
7.3 Checking the Voltages on the Sunny Central
Checking the AC Grid Voltage
• Measure and record AC voltages
– L1-L2
– L1-L3
– L2-L3
– L1-N
– L2-N
– L3-N
Check that there is a field of rotation to the right.
Checking the settings of the thermostats and the hygrostat
Compare the settings with the specifications in the circuit diagram. If they deviate, set the
values specified in the circuit diagram.
System check
The system must be checked by the system installer.
WARNING!
Danger of fire if the connection is faulty.
Procedure before the commissioning test:
• Switch the Sunny Central to "Stop".
• Ensure that the fuses are not inserted.
• Ensure that the internal main switch, load disconnection unit and circuit breakers are
not activated.
• Leave the operating room before switching on the voltage.
Deviating grid voltage
If the grid voltage deviates greatly, adjust the transformation ratio of the medium-voltage
transformer, where applicable.