Question about Malibu ML600TW - Low Voltage Power Pack - 600 Watt - With Timer and Ground

1 Answer

I just purchased Malibu ML 600 TW transformer, and ran wire and attached lights, but I can't get any of them to work. Perhaps I'm wiring it incorrectly? How do I test the transformer to see if it is working or defective?

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Malibu website
Malibu manuals

The power pack has a humming sound >> put your ear close
Plug in a hair dryer on same plug to see if you have power
Check the GFI tripper in bathroom and kitchen
Plug power pack directly into receptacle (no extension cord)
It is hard to believe you got every light wrong >> the light connections are pretty fail-proof today

1) You can test the transformer by rotating manual override counterclockwise >> that's the on-off switch
2) You can test transformer by seeing if clock dial rotates with passing time > the clock must rotate
3) You can check if wires have power > disconnect wires > use another wire to scratch across both terminals to see if there is a spark

4) Did you put the red-and-black tripper pins on the dial? Red = ON Black = OFF

5) I think you forgot to set the time of day correctly
- put in tripper pins.
- rotate center dial clockwise to present time
- now, rotate dial two more full rotations and come back to present time

If the dial will not rotate or transformer does not have power, then the transformer is defective.

Posted on Oct 09, 2010

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Malibu transformer


Unplug transformer, change bulbs with low voltage bulbs from local hardware or home center. There are two screws on back of each bulb.
Copy following link for tips to get power pack to last longer, replacement trippers, warranty, troubleshoot. etc
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
Reason for unplugging transformer: because product manual lists that as best way to change bulbs. The low voltage transformer output is 12Volts and does not carry enough power to cause you harm if you touch bare wire.
Add a comment and attach photo as needed.

May 25, 2013 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

I have a ML500TW timer transformer I don't believe they make it any mor can I replace it with a 600


Yes, use ML 600 with 5 year warranty.
Save receipt.
Copy following link for useful information about getting new power pack to last longer.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

ML 600 will have 2 sets of ABC terminals.
Each terminal supports 300 watts.
Split lights between both sets of terminals.
Use 12 gauge wire. Maximum 75' length each wire.

Apr 15, 2013 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

I purchase a Malibu ML600TW. My quest is. In this unit are there 2 separate 300 watt transformer. or when you contact the line in you are wiring to 600 watts.


With the 600 watt ML series, there are two sets of a-b-c terminals. C terminals are used with photo eye.
Connect 300 watts of bulbs to one set a-b terminals, connect 300 watts to other set of a-b terminals.
I'm not sure what is inside the power pack. However if you run less than or more than 600 watts or let your bulbs burn out for any length of time, the power pack can burn out. Save your receipt for limited 5-year warranty.

For your benefit, open following link for more information on ML power packs, plus troubleshoot, plus tips to keep power pack from burning out, and links to trippers:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
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May 24, 2011 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

How do I connect my photo cell with my mL600 TW. I did it the same as another transformer - Black outside to A, Middle black and one wire of lights to B, and spriped photo and 2nd lights to C, but it...


Open following link for ML power pack photo eye connection, trippers, plus troubleshoot, plus tips to keep power pack from burning out, and warranty:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Dec 04, 2010 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

I just purchased some spotlights to add to my already installed malibu landscaping lights. I upgraded my transformer to 300 watts since the total wattage used comes out to 220. The lights on the end of...


Yes, using a larger wire will help, as will using more than one run. If you want too, you can leave the 16 gauge wire in place, then run the new 12 gauge wire and transfer most of the lights to the new run.

The fewer lights on a run, the less dimming will occur, so put more lights on the 12 gauge run.

Also, the longer the run, the more dimming will occur.
You may want to reconsider the location of the transformer, if possible. In your case, it would be better to locate the transformer in the middle of the current run, and just split the run in half to make a run in each direction. Of course, that depends if you have a 120 volt outlet available in that area.

Jan 03, 2010 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

I have a 300 watt Malibu transformer to run 4 step lights on a patio. the wires from the step lights go through conduit under patio and all come out under some steps at the house. So I have 4 sets of wires...


Take one cable to the x-former to the 4 sets, then Splice all the wires (5 in one nut and 5 in the other) together. Then connect the one set at the x-former. Don't worry too much about the 10 ft issue. It will work fine.

Jul 05, 2009 | Intermatic Malibu 300W Power Pack...

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