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UNDERVOLTAGE
Error:
Undervoltage has been detected
Troubleshooting:
The undervoltage error message is automatically reset after 10 seconds (from version
2.60). If the error is not automatically reset, the 230 V and 24 V power supply should be
checked.
1. Is the mains switch (230 V) on the transformer lit up green?
If not, check supply cable to the transformer
If yes, continue to point 2.
2. Is the LED on the transformer lit up green (24 V)?
If not, please check the circuit board and supply cable
If yes, continue to point 3.
3. Read and make note of error messages on the circuit board, then perform reset
Switch off the transformer mains switch for at least 10 seconds; this will confirm all
errors!
4. Has the error been corrected?
If yes, check that the system works by running ‘AUF’ (OPEN) and ‘ZU’
(CLOSED) at a minimum
If not, please contact Rollo Solar
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