1. The following slides explain troubleshooting the STATE 104 in a FRONIUS IG inverter.
Please note that each slide is provided with sound. Please switch on your loudspeakers and press the keys at the bottom of each slide to proceed.
FRONIUS STATE 104
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2. FRONIUS IG Troubleshooting STATE 104
What is STATE 104?
Troubleshooting
Contact FRONIUS tech support
FRONIUS STATE 104
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3. What is STATE 104?
STATE 104 appears on the LCD of a FRONIUS IG inverter when the grid frequency goes out of limits.
For FRONIUS inverters, operating frequency range is 59.3–60.5 Hz.
The inverter is internally disconnected from the AC grid but still continues to monitor the grid frequency.
The inverter reconnects when the grid frequency is within the allowable tolerance levels.
STATE 104 also appears when
there is no AC voltage at the inverter terminals (zero frequency).
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Troubleshooting >>
FRONIUS STATE 104
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4. Troubleshooting Follow steps below to troubleshoot STATE 104: = ~
Check if the AC disconnect on the inverter, external AC disconnect and the circuit breaker in the main panel are turned ON.
If all disconnects are ON, using a multi-meter, measure the AC voltage on the top terminals of the AC disconnect on the inverter (If possible, also measure the frequency of the AC voltage).
If both voltage and frequency are within allowable levels and the inverter continues to show STATE 104, please contact FRONIUS tech support.
240V + = L1 L2 ~ -
Internal
AC-Disconnect
External
AC-Disconnect
Main panel
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FRONIUS STATE 104
©FRONIUS 2006

5. FRONIUS technical support
For more information please don’t
hesitate to contact
FRONIUS technical support
phone:
fax:
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FRONIUS STATE 104
©FRONIUS 2006