SMA SB 3000TL-20 Installation - Manual (Page 82)

Troubleshooting SMA Solar Technology AG
82 SB30TL_40TL_50TL-IA-IEN120231 Installation Guide
5. Use a multimeter to ensure that all of the varistors in
the installed state have a conducting connection
between connectors B and C.
The Sunny Boy 3000TL only has 2 varistors.
NOTICE!
Damage to the inverter through electrostatic discharges.
Components on the inside of the inverter may be irreparably damaged due to electrostatic
discharge.
• Ground yourself before you touch a component.
Position of Varistors
You can determine the position of the varistors using the illustration below.
Observe the following allocation of the
terminals:
• Terminal A: outer terminal
(Varistor connection with loop [crimp])
• Terminal B: middle terminal
• Terminal C: outer terminal
(Varistor connection without loop
[crimp])
Result Measure
☑ There is a conducting connection. There is probably a different fault in the inverter.
• Continue with step 9.
• Contact the SMA Serviceline (see section
15 ”Contact” (page 101)).