General

How do I see which options are active in my ML-2 device from the batch file I have ?
First open the batch file with the USW PC program.  you can find it here:  https://www.deif.com/software/?product=1608 In the Project Properties vario...
Mon, 18 Sep, 2023 at 2:43 PM
How to check which options are active in my device ?
When connected to a unit via the utility software, you can click the below icon in vertical toolbar left side of the screen. This menu shows you which ...
Mon, 22 Aug, 2022 at 8:48 AM
how to make a option upgrade?
If needing to make a software upgrade please follow steps in attachment. 1. Open USW and connect to ML2 unit. Click the upgrade options icon  3. Fill...
Tue, 27 Dec, 2022 at 8:29 AM
How can I replace the battery without loss of data and settings ?
Using the backup tool which can be downloaded following link below can help you with this. https://www.deif.com/software/multi-line-2-backup-tool-software/...
Mon, 18 Sep, 2023 at 2:58 PM
Preventive maintenance regarding battery wear-out ?
Some of the ML-2 controllers from DEIF A/S contains a Lithium-cell as voltage supply for a memory circuit. This Lithium cell is designed to last the expecte...
Thu, 21 Sep, 2023 at 9:01 AM
Why are the voltage shown in display different from the meters ?
Your issue is probably related to the measuring PCB in the controller. Please follow the three steps below to determine if the measuring PCB is defect and r...
Thu, 22 Dec, 2022 at 2:07 PM
Why are options and parameters lost after my unit has been power-cycled ?
The controller battery is worn out and needs replacement. As replacement is somewhat troublesome, we recommend that you request a service engineer to make t...
Mon, 18 Sep, 2023 at 3:05 PM
Application hazard, What does it mean ?
You can think about Application hazard as at least 2 controllers connect via CAN, that does not see the world in the same way.  The most usually reason ...
Mon, 18 Sep, 2023 at 3:12 PM
Controller has current readings on all phases but Power factor is hunting and breaker trips due to under/over excitation ?
1) Check Nominal Voltage settings for DG and BUS, must be similar in all the sets. 2) Check default droop settings on the AVR. Set AVR droop similar for al...
Mon, 18 Sep, 2023 at 3:18 PM
After synchronization breaker trips on Reverse power protection ?
1) Check individual DG on load, make sure P (KW) value on all phases is positive. If found negative on any phase, reverse the CT polarities. 2) Crosscheck ...
Mon, 18 Sep, 2023 at 3:23 PM