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ve.bus:ve.bus_error_codes [2019-05-10 20:42]
mvader [Error 24 - Switch-over system protection initiated]
ve.bus:ve.bus_error_codes [2019-06-24 08:08] (current)
mvader [Error 3 - Not all, or more than, the expected devices were found in the system]
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 To restart a system, first switch all units off, one by one. And then switch all units on again. Do this with the On / Off / Charger-only rocker-switch on the front of the device. To restart a system, first switch all units off, one by one. And then switch all units on again. Do this with the On / Off / Charger-only rocker-switch on the front of the device.
 +
 +*WARNING*: The steps and instructions explained here, are intended to be carried to be carried out by trained professionals. AC (and also DC) Voltages can be lethal. And certain settings and firmware updates require experience and training as well.
  
 ==== Network cable quality ==== ==== Network cable quality ====
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   - This error often follows VE.Bus Error 1. Solution: solve the cause for VE.Bus Error 1. Note that when using an older CCGX (version before v1.40), ​ it can be that the first error is not reported on the Alarm log on VRM. So even when it only lists VE.Bus Error 3, it can very well be that that error was preceeded by VE.Bus Error 1.   - This error often follows VE.Bus Error 1. Solution: solve the cause for VE.Bus Error 1. Note that when using an older CCGX (version before v1.40), ​ it can be that the first error is not reported on the Alarm log on VRM. So even when it only lists VE.Bus Error 3, it can very well be that that error was preceeded by VE.Bus Error 1.
   - The system is not properly configured: all VE.Bus devices connected to the VE.Bus network must be configured as one parallel, split- and/or three-phase system. Do not connect two separate VE.Bus systems together.   - The system is not properly configured: all VE.Bus devices connected to the VE.Bus network must be configured as one parallel, split- and/or three-phase system. Do not connect two separate VE.Bus systems together.
-  - Communication cable error: ​check the communication cables.+  - Communication cable error: ​Check the communication cables. ​Make sure to use commercial patch leads and not hand-crimped cables - VE.Bus cabling is very sensitive to physical wiring faults. 
 +  - DC fuse blown of one or more units in the system: When mains is available all units seems to work correctly, but as soon as mains fails, or as soon as the system decides to switch to Island mode for any other reason, the non powered units are disconnected from the system. 
   ​   ​
 ==== Error 4 - No other device found ==== ==== Error 4 - No other device found ====
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 Note: System restarts can also be triggered when using Remote VEConfigure. Note: System restarts can also be triggered when using Remote VEConfigure.
 +
 +Other possibility: ​
 +DC fuse blown of one or more units in the system. When mains is available all units seems to work correctly, but as soon as mains fails, the non powered units are disconnected from the system.
  
 ==== Error 11 - Relay Test Fault - Installation error or possibly relay failure ==== ==== Error 11 - Relay Test Fault - Installation error or possibly relay failure ====
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 This error can only occur on systems with multiple devices installed per phase. For example a single phase installation with two or more devices in parallel, or a three-phase installation with six or more devices. ​ This error can only occur on systems with multiple devices installed per phase. For example a single phase installation with two or more devices in parallel, or a three-phase installation with six or more devices. ​
  
-Error 17 will only appear on slaves. ​You'll see it when its phase-master ​is no longer communicating on the VE.Bus network.+Error 17 will only appear on slaves. ​They report this error when there communication with the phase-master ​has timed out.
  
-  * In some cases this error can be seen temporarily while using Remote VEConfigure to write a new configuration. +Steps to take: 
-  ​* Otherwise, the most likely cause is bad cabling/​contacts ​on the VE.Bus: ​Check cabling and contacts. Make sure to also inspect the female RJ-45 sockets, instead of only the cabling: ​Sometimes ​badly mounted RJ45 cable connectors prevent the spring-contacts in the female RJ45 connectors on the Multis to properly make contact.+  - In some cases this error can be seen temporarily while using Remote VEConfigure to write a new configuration. \\ __Solution__:​ ignore the error; the system will recover by itself
 +  ​- The most likely cause is a cable-related communication issue on the VE.Bus ​network\\ __Solution__:​ First check the network cables sockets. If that doesn'​t solve it, replace all network cables, including the cable to the [[venus-os:​start|GX Device]]. Make sure to also inspect the female RJ-45 sockets, instead of only the cabling: ​sometimes ​badly mounted RJ45 cable connectors prevent the spring-contacts in the female RJ45 connectors on the Multis to properly make contact. Make sure to machine-made cabling. Do not use self-crimped cables. 
 +  - DC fuse blown. In this case, all units can in some situations seem fine and work well as long as mains is available. And then when there is no longer AC available on the input (mains fails or generator is stopped) the non powered units are disconnected from the system. \\ __Solution__:​ Check the fuse in all units; replace the broken one. 
 +  - Update firmware and Assistants of the inverter/​chargers. And of the GX Device. \\ __Solution__:​ [[updating_firmware:​updating_ve.bus_products|Update the Inverter/​charger firmware]] - [[assistants:​how_to_update_an_assistant|Update the Assistants]] - [[ccgx:​firmware_updating|Update the GX Device firmware]]. 
 + 
 +If after all above steps you are still experiencing a VE.Bus Error 17, contact your dealer whom will contact Victron repairs; please provide photos of the installation and network cabling. Depending on the situation, they might advice to replace the [[venus-os:​start|GX device]] and the inverter/​chargers. We advise to replace only the GX device first since that is less work.
  
-If nothing can be found and the failure persists a hardware error might be the cause. Contact your distributor,​ and also report the exact LED indication of the Master and all slaves in that phase. 
 ==== Error 18 - AC Over-voltage on the output of a slave while switched off ==== ==== Error 18 - AC Over-voltage on the output of a slave while switched off ====
 Solution: check if AC wires are not swapped by accident. There can never be voltage on the AC out when a unit is switched off.  Solution: check if AC wires are not swapped by accident. There can never be voltage on the AC out when a unit is switched off. 
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 ==== Error 24 - Switch-over system protection initiated ==== ==== 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 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 error indicates that one or more units report feeding back a significant current through its back-feed relay, while those relay are supposed to be open, and -obviously- no current can flow through an open circuit. 
 + 
 +What is the back-feed relay? It is the relay that closes when connecting to the grid or generator. And which opens when there is no power available, ie when the system is in island- or invert-mode. 
 + 
 +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. This can mean one of two things: 
 + 
 +  ​The relay did not open
 +  - The related current measurement circuit is faulty. 
 + 
 +Error 24 is a very rare error. Possible causes in order of probability:​ 
 + 
 +  * There is too much AC load connected at the moment the relay needs to switch off. This large current will prevent the relay contacts from opening.\\ __Solution__:​ remove excessive load. See transfer switch capacity in the datasheet for the maximum rating. 
 +  * The AC input voltage slowly drops before ​it is being rejected by the Multis. Typically happens in installations with a generator. Especially when combined with AC loads that increase their current draw when the AC voltage drops: by the time that the inverter/​charger initiates the disconnect, the current through the relays has increased well beyond the ratings, and is too high to open them.\\ __Solution__:​ Make the Multis or Quattros disconnect earlier: increase lower limit of AC input voltage in VEConfigure3. For example to 210 VAC. The factory setting is 180 VAC. 
 +  * The back-feed relay has a hardware failure \\ __Solution__:​ Replace faulty unit. 
 +  * The related current measurement circuit is faulty. \\ __Solution__:​ Replace faulty unit.
  
-This should not occur in correctly installed and sized system. Possible causes in order of probability:​+__Diagnosing ​parallel, multi or split-phase ​system?__
  
-  - There is too much AC load connected ​at the moment the relay needs to switch offThis large current will prevent the relay contacts from opening.\\ \\ Solution: remove excessive load. See transfer switch capacity in the datasheet for the maximum rating. \\ \\ +Error 24 will always appear on all units at the same timeThere is unfortunately no indication, not on LEDs, nor on GX device, VRM, or any other manner, ​to see which of the devices caused ​the errorBelow procedures outlines how to manually determine which unit has a faulty ​relay.
-  - The AC input voltage slowly drops before it is being rejected by the Multis. Typically happens in installations with genset. Especially when combined with AC loads that increase their current draw when the AC voltage drops: at the moment the Multis ​or Quattros decide ​to switch off, the current through ​the relays is well beyond the ratings, and too high to open them.\\ \\ Solution: Make the Multis or Quattros disconnect earlier: increase lower limit of AC input voltage in VEConfigure3. For example ​to 210 VAC. The factory setting is 180 VAC. \\ \\ +
-  - The back-feed relay has a hardware failure \\ \\ Solution: Replace ​faulty ​unit.+
  
-__Diagnostic notes for systems showing error 24 where a stuck 'on' relay is suspected__+Do make sure to first, always double check option 1 and 2 in above list. Those are the common causes. In case that doesn't lead to a solution, follow this procedure to find out if its a relay issue, and then which unit.
  
-In a single phase installation with two or more devices in parallel, or a three-phase installation with six or more devices, it can be difficult to identify ​the unit that is faulty because all units in at the relevant group of units will raise 'Error 24'+Execute this procedure right after the error occurred; do not first reset the system
  
-This happens because the faulty unit will be (incorrectly) supplying AC energy on it output at times when it should not be - including when its front panel rocker switch is set to '​off',​ When energy from the faulty unit's AC output flows in to the other unit(s) via their AC outputs, this causes these other units to be (incorrectly) flagged for 'Error 24' by the system self-test. The units concerned may also be '​buzzing'​ in the presence of AC power at their inputs with their rocker switches set '​off'​.+__Step 1__
  
-__Steps to take__+Start with making a video of all units and their LED code. Do not first reset the system; and do not reset it after making the video either.
  
-Right after the error occurred, first of all make a video of all units and their LED code.+__Step 2__
  
-Then, completely ​disconnect all AC wiring, both in- and out, on all units.+Completely ​disconnect all AC wiring, both in- and out, on all units. Make pictures of the terminals; to make sure when discussing this with an engineer; there is no misunderstanding on what has been meant by this instruction.
  
 +__Step 3__
 Now, with an ohm-meter, measure the resistance between the neutral terminals on AC-input and the AC-output, A working unit will show no connection between these terminals. And also measure the resistance between the Line terminals of AC-input and AC-output. Now, with an ohm-meter, measure the resistance between the neutral terminals on AC-input and the AC-output, A working unit will show no connection between these terminals. And also measure the resistance between the Line terminals of AC-input and AC-output.
  
ve.bus/ve.bus_error_codes.1557513773.txt.gz · Last modified: 2019-05-10 20:42 by mvader