MultiPlus-II 12V/24V/48V 3kVA 120V

7. Error Indications

In this section:

With the procedures below, most errors can be quickly identified. If an error cannot be resolved, please refer to your Victron Energy supplier.

We recommend to use the toolkit app to link LED alarm codes to a description of the problem/alarm, see https://www.victronenergy.com/support-and-downloads/software#victron-toolkit-app

7.1. General error indications

Problem

Cause

Solution

No output voltage on AC-out-2.

MultiPlus-II in inverter mode

Multi will not switch over to generator or mains operation.

Circuit breaker or fuse in the AC-in input is open as a result of overload.

Remove overload or short circuit on AC-out-1 or AC-out2, and reset fuse/breaker.

Inverter operation not initiated when switched on

The battery voltage is excessively high or too low. No voltage on DC connection.

Ensure that the battery voltage is within the correct range.

‘Low battery’ LED flashes

The battery voltage is low.

Charge the battery or check the battery connections.

Low battery’ LED lights.

The converter switches off because the battery voltage is too low.

Charge the battery or check the battery connections.

‘Overload’ LED flashes.

The converter load is higher than the nominal load.

Reduce the load.

‘Overload’ LED lights

The converter is switched off due to excessively high load.

Reduce the load.

‘Temperature’ LED flashes or lights.

The environmental temperature is high, or the load is too high.

Install the converter in cool and well-ventilated environment, or reduce the load.

‘Low battery’ and ‘overload’ LEDs flash intermittently.

Low battery voltage and excessively high load.

Charge the batteries, disconnect or reduce the load, or install higher capacity batteries. Fit shorter and/or thicker battery cables.

‘Low battery’ and ‘overload’ LEDs flash simultaneously.

Ripple voltage on the DC connection exceeds 1,5 Vrms.

Check the battery cables and battery connections. Check whether battery capacity is sufficiently high, and increase this if necessary.

‘Low battery’ and ‘overload’ LEDs light.

The inverter is switched off due to an excessively high ripple voltage on the input.

Install batteries with a larger capacity. Fit shorter and/or thicker battery cables, and reset the inverter (switch off, and then on again).

One alarm LED lights and the second flashes.

The inverter is switched off due to alarm activation by the lighted LED. The flashing LED indicates that the inverter was about to switch off due to the related alarm.

Check this table for appropriate measures in regard to this alarm state.

The charger does not operate.

The AC input voltage or frequency is not within the range set.

Ensure that the AC input is between 97 VAC and 140 VAC, and that the frequency is within the range set (default setting 45-65 Hz).

Circuit breaker or fuse in the AC-in input is open as a result of overload.

Remove overload or short circuit on AC-out-1 or AC-out-2, and reset fuse/breaker.

The battery fuse has blown.

Replace the battery fuse.

The distortion or the AC input voltage is too large (generally generator supply).

Turn the settings WeakAC and dynamic current limiter on.

The charger does not operate.

‘Bulk’ LED flashes and ‘Mains on’ LED illuminates

MultiPlus-II is in ‘Bulk protection’ mode thus, the maximum bulk charging time of 10 hours is exceeded.

Such a long charging time could indicate a system error (e.g. a battery cell short-circuit).

Check your batteries.

Note

You can reset the error mode by switching off and back on the MultiPlus-II.

The standard MultiPlus-II factory setting of the ’Bulk protection’ mode is switched on. The ‘Bulk protection’ mode can be switched off with help of VEConfigure only.

The battery is not completely charged.

Charging current excessively high, causing premature absorption phase.

Set the charging current to a level between 0.1 and 0.2 times the battery capacity.

Poor battery connection.

Check the battery connections.

The absorption voltage has been set to an incorrect level (too low).

Set the absorption voltage to the correct level.

The float voltage has been set to an incorrect level (too low).

Set the float voltage to the correct level.

The available charging time is too short to fully charge the battery.

Select a longer charging time or higher charging current.

The absorption time is too short. For adaptive charging this can be caused by an extremely high charging current with respect to battery capacity, so that bulk time is insufficient.

Reduce the charging current or select the ‘fixed’ charging characteristics.

The battery is overcharged.

The absorption voltage is set to an incorrect level (too high).

Set the absorption voltage to the correct level.

The float voltage is set to an incorrect level (too high).

Set the float voltage to the correct level.

Poor battery condition.

Replace the battery.

The battery temperature is too high (due to poor ventilation, excessively high environmental temperature, or excessively high charging current).

Improve ventilation, install batteries in a cooler environment, reduce the charging current, and connect the temperature sensor.

The charging current drops to 0 as soon as the absorption phase initiates.

The battery is over-heated (>50°C)

  • Install the battery in a cooler environment

  • Reduce the charging current

  • Check whether one of the battery cells has an internal short circuit

Defective battery temperature sensor

Disconnect the temperature sensor plug in the MultiPlus-II. If charging functions correctly after approximately 1 minute, the temperature sensor should be replaced.

7.2. Special LED indications

(for the normal LED indications, see section 3.4)

‘Mains on’ flashes and there is no output voltage

The device is in ‘charger only’ operation and mains supply is present. The device rejects the mains supply or is still synchronising.

Bulk and absorption LEDs flash synchronously (simultaneously).

Voltage sense error. The voltage measured at the voltage sense connection deviates too much (more than 7V) from the voltage on the positive and negative connection of the device. There is probably a connection error.

The device will remain in normal operation.

Note

If the "inverter on" LED flashes in phase opposition, this is a VE.Bus error code (see further on).

Absorption and float LEDs flash synchronously (simultaneously).

The battery temperature as measured has an extremely unlikely value. The sensor is probably defective or has been incorrectly connected. The device will remain in normal operation.

Note

If the "inverter on" LED flashes in phase opposition, this a VE.Bus error code (see further on).

7.3. VE.Bus LED indications

Equipment included in a VE.Bus system (a parallel or 3-phase arrangement) can provide so-called VE.Bus LED indications. These LED indications can be subdivided into two groups: OK codes and error codes.

7.3.1. VE.Bus OK codes

If the internal status of a device is in order but the device cannot yet be started because one or more other devices in the system indicate an error status, the devices that are in order will indicate an OK code. This facilitates error tracing in a VE.Bus system, since devices not requiring attention are easily identified as such.

Important

OK codes will only be displayed if a device is not in inverter or charging operation!

  • A flashing ‘bulk’ LED indicates that the device can perform inverter operation.

  • A flashing ‘float’ LED indicates that the device can perform charging operation.

Note

In principle, all other LEDs must be off. If this is not the case, the code is not an OK code. However, the following exceptions apply:

  • The special LED indications above can occur together with the OK codes.

  • The ‘low battery’ LED can function together with the OK code that indicates that the device can charge.

7.3.2. VE.Bus error codes

A VE.Bus system can display various error codes. These codes are displayed with the “inverter on”, “bulk”, “absorption” and “float” LEDs.

To interpret a VE.Bus error code correctly, the following procedure should be followed:

  1. The device should be in error (no AC output).

  2. Is the ‘inverter on’ LED flashing? If not, then there is no VE.Bus error code.

  3. If one or more of the LEDs ‘bulk’, ‘absorption’ or ‘float’ flashes, then this flash must be in phase opposition to the ‘inverter on’ LED, i.e. the flashing LEDs are off if the ‘inverter on’ LED is on, and vice versa. If this is not the case, then there is no VE.Bus error code.

  4. Check the ‘bulk’ LED, and determine which of the three tables below should be used.

  5. Select the correct column and row (depending on the ‘absorption’ and ‘float’ LEDs), and determine the error code. 6. Determine the meaning of the code in the tables below.

  6. Determine the meaning of the code in the tables below.

All of the conditions below must be met!:

  1. The device is in error! (No AC output)

  2. Inverter LED flashes (in opposition to any flashing of the Bulk, Absorption or Float LED)

  3. At least one of the LEDs Bulk, Absorption and Float is on or flashing

Bulk LED off

Absorption LED

off

flashing

on

Float LED

off

0

3

6

flashing

1

4

7

on

2

5

8

Bulk LED flashes

Absorption LED

off

flashing

on

Float LED

off

9

12

15

flashing

10

13

16

on

11

14

17

Bulk LED on

Absorption LED

off

flashing

on

Float LED

off

18

21

24

flashing

19

22

25

on

20

23

26

Bulk LED Absorption LED Float LED

Code

Meaning:

Cause/solution:

MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_blink.png

1

Device is switched off because one of the other phases in the system has switched off.

Check the failing phase.

MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_blink.png
MP_manual_LED_symbol_-_off.png

3

Not all, or more than, the expected devices were found in the system.

The system is not properly configured. Reconfigure the system.

Communication cable error. Check the cables and switch all equipment off, and then on again.

MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_blink.png
MP_manual_LED_symbol_-_blink.png

4

No other device whatsoever detected

Check the communication cables.

MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_blink.png
MP_manual_LED_symbol_-_on.png

5

Overvoltage on AC-out.

Check the AC cables.

MP_manual_LED_symbol_-_blink.png
MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_blink.png

10

System time synchronisation problem occurred.

Should not occur in correctly installed equipment. Check the communication cables.

MP_manual_LED_symbol_-_blink.png
MP_manual_LED_symbol_-_blink.png
MP_manual_LED_symbol_-_on.png

14

Device cannot transmit data.

Check the communication cables (there may be a short circuit)

MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_on.png

17

One of the devices has assumed ‘master’ status because the original master failed.

Check the failing unit. Check the communication cables.

MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_off.png

18

Overvoltage has occurred

Check AC cables.

MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_off.png
MP_manual_LED_symbol_-_off.png

22

This device cannot function as ‘slave’.

This device is an obsolete and unsuitable model. It should be replaced

MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_off.png

24

Switch-over system protection initiated.

Should not occur in correctly installed equipment. Switch all equipment off, and then on again. If the problem recurs, check the installation.

Possible solution: increase lower limit of AC input voltage to 110 VAC (factory setting is 90 VAC)

MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_off.png

25

Firmware incompatibility. The firmware of one the connected devices is not sufficiently up to date to operate in conjunction with this device.

  1. Switch all equipment off.

  2. Switch the device returning this error message on.

  3. Switch on all other devices one by one until the error message reoccurs.

  4. Update the firmware in the last device that was switched on.

MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_on.png
MP_manual_LED_symbol_-_on.png

26

Internal error.

Should not occur. Switch all equipment off, and then on again. Contact Victron Energy if the problem persists.