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--- ve.bus:ve.bus_error_codes [2019-02-08 23:09] – external edit 127.0.0.1
+++ ve.bus:ve.bus_error_codes [2019-02-14 10:16] – martijncoster
@@ Line 79: / Line 79: @@
 This error only applies to the MultiGrid, MultiPlus-II, EasySolar-II and other inverter/chargers with a dual backfeed relay. As part of grid-code compliance; the device tests verifies that its internal relays function properly.
-This error will show when the back-feed relay test of the inverter/charger fails. The relays are automatically self-tested every time before the inverter/charger connects to mains.
+The relays are tested when a grid code is selected in VEConfigure. When the grid-code is set to None, the tests are not performed.
+When VE.Bus error 11 shows, either the back-feed relay test, ground relay test, or measurement redundancy tests has failed. The tests are automatically performed every time before connecting to mains.
 The three root causes of the error can be (from most common to least common):
 ) In most cases, when you see Error 11, its due to an installation error:\\
-  * Please verify whether the incoming AC is a TN network
+  * Please verify that the neutral is connected to earth on the supply side. In many countries this is done by the utility in the transformer cabinet (a TN network).
-  * Line and Neutral should be connected to the corresponding L and N input on the inverter/charger. A swapped connection results in Error 11
+  * Line should be connected to the corresponding Line input on the inverter/charger, same for Neutral. A swapped connection results in Error 11.
   * There should be no external connection between N-out and GND
 ) For Australia: contact your distributor.
-) Once of the relays in the unit is broken; contact your distributor for a replacement.
+) Hardware defect; contact your distributor for a replacement.
+=== Detailed diagnosis of Error 11 ===
+After updating your VE.Bus inverter/charger to firmware 454 or higher; and running Venus OS v2.23~3 or later, a detailed VE.Bus Error report becomes available:
+[TODO; add image here]
+{{ :ve.bus:error11-ccgx1.jpg?nolink&450 |}}
+{{ :ve.bus:error11-ccgx2.jpg?nolink&450 |}}
+{{ :ve.bus:error11-ccgx3.jpg?nolink&450 |}}
+{{ :ve.bus:error11-ccgx4.jpg?nolink&450 |}}
+It shows:
+  * A six digit number; which contains all the details
+  * A counter
+  * Flags
+  * The failed step; it counts backwards: step 9 -> 8 -> 7 and so forth.
+Common causes:
+  * Failing step #8: check that line and neutral have not been swapped. Unlike non-grid code installations; line and neutral need to be wired correctly.
+  * PE2 open error: check that AC-out Neutral is not wired to Ground. Short circuiting them is not allowed. Also, check that there is no leakage between Neutral and ground, for example because broken consumer. Start by disconnecting all loads: open all the circuit breakers.
+In all other cases, contact your Victron representative for support. Please provide a photo of the error; and otherwise the 6 digit number at the top.
 ==== Error 14 - Device cannot transmit data ====
@@ Line 119: / Line 143: @@
 ==== Error 24 - Switch-over system protection initiated ====
 There is a back-feed (or 'anti-islanding') relay present on the AC input of each unit. This relay is automatically opened during periods of AC input loss (e.g. grid or generator failure) as a safety mechanism to avoid the back-feeding of AC energy 'upstream'.
-Error 24 is raised when a Multi or Quattro detects current flowing through a back-feed relay during a period when the relay should be open - which means that the relay did not open when it should.
+Error 24 is raised when a Multi or Quattro detects current flowing through the back-feed relay during a period when the relay should be open - which means that the relay did not open when it should.
 This should not occur in a correctly installed and sized system. Possible causes in order of probability:
@@ Line 129: / Line 153: @@
   - The back-feed relay has a hardware failure (and is stuck 'on')\\ \\ Solution: Replace faulty unit.
-__Diagnostic notes for multi-unit clusters showing error 24__
+__Diagnostic notes for systems showing error 24 where a stuck 'on' relay is suspected__
+In a single unit system, turn the unit 'off' on the front panel rocker switch and apply AC input power. Measure the AC output. If AC voltage is present, the unit is faulty (stuck relay).
-With all Multis or Quattros set to 'off' on their front panel rocker switches and with AC power presented to the input of the system, there should be no AC present on the AC-1 output terminals.
+In a three-unit, three-phase cluster (only one unit per phase), the faulty unit can be identified in the same way. As for the single unit case, any unit presenting AC output voltage when the rocker switch is set to 'off' is faulty.
-If AC //is// present on the output side while the units are switched off, this energy is flowing via the stuck back-feed relay. AC is also being back-fed into the inverter output circuitry as a result, and this may result in all units audibly 'humming' (even though they are set to be 'off').
+You can also determine the faulty unit(s) by just listening for units that are //audibly humming// while their front panel rocker switch is set 'off'. The humming is because AC power is being applied to the internal circuitry when it should not be.
-In a parallel-wired cluster, one faulty relay will make it appear that all units wired in parallel are faulty. To determine which unit is really at fault, power the cluster down and un-wire all AC inputs and all AC outputs. Then apply DC battery power and configure each unit into standalone mode so that it starts to invert and present power to its AC output. Any unit where there is //also// AC energy present on the //input// terminals has a stuck back-feed relay and needs to be replaced.
+Where there are multiple units hardwired in parallel (a multi-unit/single phase system, or a three-phase cluster with 6 or more units), then there is an additional diagnostic challenge. In these systems, the faulty unit will be feeding energy out from its AC output and this energy will then flow into to the other (good) units via their respective AC output terminals. This results in //all// units that are parallel-wired appearing to be faulty, and all units concerned humming while set to 'off'.
+The most conclusive way to determine which unit is faulty in this case is to un-wire the AC outputs of all the units concerned to prevent the cross-feeding of AC energy via the AC outputs. Then apply AC power with all units still set to 'off' on their front panel rocker switches. The faulty unit is the one that is still humming and that is still presenting AC voltage on its output terminals.
 ==== Error 25 - Firmware incompatibility ====
 Make sure to use the same firmware in all devices.