10 Troubleshooting
SMA Solar Technology AG
Operating manual
STP15-25TL-30-BE-en-17
69
3. Check whether air is being drawn in through the bottom and is coming out of the upper
ventilation grid and whether the fan is making any unusual noises.
If no air is being drawn in through the bottom, no air is coming out of the ventilation grid, or
the fan is making unusual noises, then the fan may have been installed incorrectly. Check
whether the fan has been installed correctly.
If the fans were installed correctly, contact Service (see Section 16, page 91).
4. Select the parameter
Fan test
or
FanTst
and set to
Off
.
5. Save settings.
10.4 Checking the PV System for Ground Faults
If the red LED is glowing and the event number 3501, 3601 or 3701 is being displayed in the
Results
menu on the inverter user interface, there may be a ground fault present. The electrical
insulation from the PV system to ground is defective or insufficient.
DANGER
Danger to life due to electric shock when touching live system components in
case of a ground fault
If a ground fault occurs, parts of the system may still be live. Touching live parts and cables
results in death or lethal injuries due to electric shock.
• Disconnect the product from voltage sources and make sure it cannot be reconnected
before working on the device.
• Touch the cables of the PV array on the insulation only.
• Do not touch any parts of the substructure or frame of the PV array.
• Do not connect PV strings with ground faults to the inverter.
• Ensure that no voltage is present and wait five minutes before touching any parts of the PV
system or the product.
WARNING
Danger to life due to electric shock from destruction of the measuring device
due to overvoltage
Overvoltage can damage a measuring device and result in voltage being present in the
enclosure of the measuring device. Touching the live enclosure of the measuring device results in
death or lethal injuries due to electric shock.
• Only use measuring devices with a DC input voltage range of 1000 V or higher.
Procedure:
In order to check the PV system for ground faults, perform the following actions in the prescribed
order. The exact procedure is described in the following sections.
• Check the PV system for ground faults by measuring the voltage.
Summary of Contents for 15000TL
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