Differences

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--- mppt-error-codes [2025-03-17 15:46] – [Err 76 - Insufficient inverters] rvanzundert
+++ mppt-error-codes [2026-09-30 07:32] (current) – rvanzundert
@@ Line 175: / Line 175: @@
 If the charger is unable to turn off the PV input, it will go into a safe mode in order to protect the battery from over-charging or having a high voltage on the battery terminals. In order to do that, the charger will stop charging and disconnect its own output. The charger will become faulty.
-==== Err 41 - Inverter shutdown (PV isolation) ====
+==== Err 41 - PV isolation failure ====
 PV panel isolation resistance too low.
-Check the PV array cabling and panel isolation, the inverter restarts automatically once the issue is resolved.
+Check the PV array cabling and panel isolation.
+=== Inverters or Multis ===
+The inverter restarts automatically once the issue is resolved.
+Consider disconnecting the PV array using the PV switch to immediately resume AC operation.
+=== Solar Chargers ===
+The isolated battery charger remains operational.
+Once the issue is resolved restart the charger to clear this warning.
-==== Err 42 - Inverter shutdown (PV isolation) ====
+==== Err 42 - PV isolation failure ====
 The ground leakage current in the PV array exceeds the allowed 30mA limit.
 Check the PV array cabling and panel isolation.
-Check the installation and restart the unit using the power-switch.
+Consider disconnecting the PV array using the PV switch to resume AC operation.
-==== Err 43 - Inverter shutdown (Ground Fault) ====
+==== Err 43 - Ground fault detected ====
 The voltage difference between Neutral and Ground is too high.
-Inverter or Multi (not connected to the grid):
+=== Inverter or Multi (not connected to the grid) ===
   * The internal ground relay is activated but the voltage over the relay is too high. The relay might be damaged.
-Multi (connected to the grid):
+=== Multi (connected to the grid) ===
   * The ground wire in the installation is not present or not connected properly.
   * Line and Neutral are swapped in the installation.
@@ Line 313: / Line 321: @@
 The inverters remain operational, they won't connect to the grid. Once the issue is resolved the units will connect.
-==== Err 74 - Phase overload ====
+==== Err 74 - Too many units in parallel ====
 Applies to Inverter RS and Multi RS models. Firmware versions 1.12 and higher.
 The number of inverters in parallel doesn't match with the transfer capabilities of the ac input relay of the Multi RS or Transfer switch.
-Firmware v1.12 does not support parallel units and a grid connection, so any combination of a Multi RS with a grid connection with more than one unit in parallel will trigger this error code on the Multi RS. The Multi RS only supports 3 units in 3-phase configuration at the moment.
+The firmware does not support parallel units and a grid connection, so any combination of a Multi RS with a grid connection with more than one unit in parallel will trigger this error code on the Multi RS. The Multi RS only supports 3 units in 3-phase configuration at the moment.
 The inverters remain operational, they won't connect to the grid. Once the issue is resolved the units will connect.
@@ Line 335: / Line 343: @@
 Related configuration settings in VictronConnect are "Prevent CAN network islanding" + "Number of inverters in the system" and "Continue with missing phase" in the System section.
+==== Err 77 - Settings sync disabled ====
+Applies to Inverter RS and Multi RS models. Firmware v1.29 and higher.
+This is a warning that indicates a mixed configuration in a networked setup where system settings synchronisation is enabled on some devices but not on all units. The units that have the settings synchronisation disabled show this warning. The units remain operational, to clear the warning either enable or disable system settings synchronisation on all units.
 ==== Err 80, Err 81, Err 82, Err 83, Err 84, Err 85, Err 86 and Err 87 - PV Input shutdown ====