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

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Transformer timer manual

TIMER DIAL STOPPED WORKING

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Posted on Jan 02, 2017

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SOURCE: i have the ml121rt transformer. the lights work

Power pack is getting electricity.
Connections are good where lights tie into wire.

My power pack was doing same thing.
I tried everything from spraying WD40 to trying to taking it apart.
Power pack doesn't come apart.
I turned it upside down thinking water or dirt got into timer.
I took it inside and let it warm up.
It still wouldn't work.
Then I searched Intermatic and Malibulights.com for answer, but they have no troubleshooting or repair.
Conclusion: when power pack doesn't work, it is broken.

I found tips to preserve power packs, but over the years I pretty much followed these steps and power pack still failed.
1) Match wattage of bulbs with wattage of power pack
-15 each X 20 watt bulbs = 300 watts, so install 300Watt power pack
2) Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
3) Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
4) When working on bulbs, unplug power pack or it may burn out.
http://www.malibulights.com/guides_support/low_voltage_planning_guide/select_your_power_pack

Posted on Nov 19, 2010

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1 Answer

How to set clock timer to over ride?


Rotate override knob located above dial.
For permanent override, remove trippers from dial
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Gene

Jun 28, 2014 | Intermatic Malibu 300W Power Pack...

1 Answer

Intermatic dial doesn't automatically switch sprinklers


1) Trippers can wear down. Transformer can go bad if model has 24Volt output. Relay can go bad.
http://waterheatertimer.org/pdf/How-to-Set-and-Troubleshoot-Intermatic-sprinkler-timer.pdf
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler

2) Add a comment Feb 2013 with model number, and include if this is new timer or older timer that worked before and stopped working.

Feb 10, 2013 | Intermatic T101 - 24 Hr. Dial Time Switch...

1 Answer

Malibu transformer ml44p doesn't turn off


Check if trippers are worn.
Check if dial rotates and keeps good time.
Plug transformer into cheap wall timer.

Copy following link for trippers, 5-year warranty info, tips to make power pack last longer, and other troubleshoot resources:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Oct 30, 2012 | Intermatic Malibu 121W Power Pack...

1 Answer

Lost manual for ML300RTW transformer. Does this transformer have an override so I can plug into exterior timer? If so, where is it?


Yes power pack has override, depending on model.
There should be a small knob located above and to left of dial that rotates: Step 8 in Manual says: You can manually operate the lights by turning the Manual ON/OFF Switch counter clockwise.
http://www.intermatic.com/~/media/files/intermatic/products/instructions/professional%20lighting/ml300rtw%20ml300rtwsn%20trilingual.ashx

For information on Intermatic/Malibu power packs showing links to manuals, troubleshoot steps, replacement trippers, useful links, warranties and tips:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Add a comment with your experience so others with same-similar problem can benefit.

Also 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.

Apr 02, 2011 | Intermatic Malibu 300W Power Pack...

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...


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.

Oct 09, 2010 | Malibu ML600TW - Low Voltage Power Pack -...

3 Answers

Timer stops at on postion? transfomer works, have to do it by hand


If the timer is stopping, it could be a physical obstruction. Or it could be an electrical mis wiring so that the timer is turning itself off at that point, check the incoming wiring and see if it makes sense, and follow the diagram to see if the incoming power is definitely not on any switched terminals, they would maybe be marked with NO , NC,

May 04, 2010 | Intermatic Malibu 300W Power Pack...

2 Answers

My timer says "off pwr". It wont run the program or work manually.


check for power to outlet, blown fuse, or bad transformer. these are the most common issues

Jul 21, 2009 | Orbit 57882 9 Station Super Dial...

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