Isolation Fault Troubleshooting - Application Note
Isolation Fault Troubleshooting - Application NoteVersion HistoryVersion - August 2022 - 1000V testing supported on S-Series optimizersVersion - October 2021 - Updated tester-to-module connection schemeVersion - October 2021 - 'Checking the DC Voltage' procedure updated, error codes updatedContentsIntroduction1Identifying an Isolation Fault1Troubleshooting an Isolation Fault (Using the inverter LCD Display or SetApp)2Using an Insulation Tester7IntroductionIn photovoltaic systems with a transformer-less inverter , the DC is isolated from ground. Modules with defective module Isolation , unshielded wires, defective power optimizers, or an inverter internal Fault can cause DC current leakage to ground (PE - protective earth). Such a Fault is also called an Isolation Fault .
Troubleshooting an Isolation Fault (Using the Inverter LCD Display or SetApp) 2 Using an Insulation Tester 7 Introduction In photovoltaic systems with a transformer-less inverter, the DC is isolated from ground. Modules with defective module isolation,
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