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ve.bus:ve.bus_error_codes [2019-02-20 06:38]
mvader
ve.bus:ve.bus_error_codes [2019-05-18 07:13] (current)
mvader [Error 17 - Original Master Missing]
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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.
 +
 +==== Network cable quality ====
 +
 +Make sure to use industrially made network cabling. Using self crimped RJ45 cables is a known cause of various of below list of errors.
 +
 +This applies to network cables for split-, three phase and parallel systems as well as connecting a GX Device or other accessory on the VE.Bus network.
  
 ===== VE.Bus Error Codes ===== ===== VE.Bus Error Codes =====
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   * 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.   * 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.
  
-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. 
 + 
 +__How to determine which unit raised the error in a parallel, multi or split-phase system?__ 
 + 
 +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 see which unit raises the error. 
 + 
 +In any installation with more than one unit, it is not possible to identify which one triggered the error. Error 24 will always appear on all units at the same time. There is no indication, not on LEDs, nor on a GX device or any other manner, to see which unit raised the error.
  
-This should not occur in a correctly installed and sized system. Possible causes in order of probability:​+__Step 1__
  
-  - 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. \\ \\ +Right after the error occurred, make a video of all units and their LED codeDo not first reset the system; and do not reset it after making ​the video either.
-  - The AC input voltage slowly drops before ​it is being rejected by the Multis. Typically happens in installations with a 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 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__+__Step 2__
  
-In a single phase installation with two or more devices ​in parallel, or a three-phase installation with six or more devicesit can be difficult to identify the unit that is faulty because ​all units in at the relevant group of units will raise 'Error 24'+Completely disconnect all AC wiring, both in- and outon 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.
  
-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 outputsthis causes ​these other units to be (incorrectly) flagged for 'Error 24' by the system self-testThe units concerned may also be '​buzzing'​ in the presence ​of AC power at their inputs with their rocker switches set '​off'​.+__Step 3__ 
 +Now, with an ohm-metermeasure ​the resistance between the neutral terminals on AC-input and the AC-outputA working unit will show no connection between ​these terminalsAnd also measure ​the resistance between the Line terminals ​of AC-input and AC-output.
  
-To help identify which unit is faulty in this scenario, first un-wire the AC outputs of all the units concerned ​to prevent 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. Measure the AC output terminals with a meter - the faulty unit is the one that is still presenting AC voltage on its output terminals. If this approach is not successful, try turn turning the units '​On'​ and look for which unit now presents 'Error 24' in isolation+A faulty ​unit will measure zero or close to zero resistance.
  
-If this is not conclusive, try completely disconnecting all suspect ​units from all AC and DC sourcesWith 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. A faulty unit may show a connection to be present between these terminals, with either zero resistance or potentially with a small a non-zero (and non-normal) resistance present.+Good units will measure discontinuity between the Line in and out terminalsAnd measure ​a few hundred ohms between the neutral ​In and Out AC terminals.
  
 ==== Error 25 - Firmware incompatibility ==== ==== Error 25 - Firmware incompatibility ====
ve.bus/ve.bus_error_codes.1550641110.txt.gz · Last modified: 2019-02-20 06:38 by mvader