Question about Intermatic Malibu 300W Power Pack Transformer ML300RTW

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Malibu Low Voltage Outdoor 300-Watt Digital Transformer. I have it installed and it works and turns on. But for whatever reason, it doesn't matter if the setting is on auto or on timer, the lights shut off in 2 minutes and I need to press the reset button on the box for it to come back on. Then in 2minutes, it goes off again. Is there something else I need to be resetting?

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  • dkeeler66
    dkeeler66 Sep 17, 2012

    We are having the exact same problem. Has anyone ever figured out how to solve it?

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How many watts of lights are connected to the transformer. It should be between 250 and 300 watts.
Gary

Posted on Mar 20, 2011

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Transformers make humming sound.
ML300 series transformers make sound.
Used styrafoam to separate transformer from contact with building so sound is not carried.
These transformers have 10 year limited warranty.

Copy following link for general troubleshoot and tips, and warranty information, and trippers.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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Promoters should include useful information. Not just air-head fluff.
Copy following link for actual useful do-it-yourself information such as warranty, troubleshoot, operation tips, manuals.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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Can I mount the malibu 600 watt power pack inside a garage


Yes. ML600 can be installed inside garage.
This series low-voltage timer is OUTDOOR timer since the wires and open wiring terminals are small hazard inside home. Somebody may trip over wires.
Open following link for tips, wiring, manuals, and troubleshoot:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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I have model ml600twsn 600 watt intermatic timer for my outdoor lights.Recently I have been unable to set them to turn off an on automatically. I can manually. what should I do?


You have malibu-type low-voltage transformer.

There are no repair parts for this type of timer, and nobody reports being able to fix timer once it goes bad.

1) "Harry" wrote to fixya with a work-around: He bought cheap plug-in timer, set malibu timer on override, and plugged malibu into wall timer.

2) Harry also said that his timer has 5 year warranty, and he was negotiating for replacement.
Contact Intermatic:
http://www.intermatic.com/customer%20service.aspx

3) Buy another timer:
http://www.amazon.com/Malibu-Intermatic-600watt-Professional-Transformer/dp/B000PGPO50

4) I found tips for next power pack that might save money:
The reason I add tips now, before power pack needs replacement is some fella wrote fixya.
He bought 500 Watt power pack to replace 300 Watt > thinking bigger was better.
Power pack burned out. Here's why:
a) Match wattage of bulbs with wattage of power pack
-15 each X 20 watt bulbs = 300 watts, so install 300Watt power pack
b) Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
c) Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
d) 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

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 27, 2011 | Garden

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I lost the small clip that is inserted into the timer at the time yo want the lights to come on,.


Trippers for low voltage timers are not available at Malibulights.com or Intermatic, or ebay.
That explains why folks ask power pack questions on fixya instead of finding results at the manufacturer's website.
New Malibu power packs are electronic and not mechanical

'Harry' wrote me about a work-around for lost trippers.
He bought ordinary 3-prong wall timer, and then set malibu power pack override to ON, and then plugged power pack into wall timer. 3-prong timers sell for $10 at Walmart and Target.
http://www.amazon.com/Woods-59204-Weather-Outdoor-Repeats/dp/B0014WRNNK
http://www.smarthome.com/56006/Woods-13571-Indoor-and-Outdoor-24-Hour-Mechanical-Timers-2-Pack/p.aspx
I put my busted power pack on a remote timer, but I like timers.
http://www.amazon.com/Woods-32555-Weatherproof-Outdoor-Converter/dp/B001Q9EFUK

My research into power pack issues resulted in tips for maintaining and setting up power packs.
The reason I add these tips now, before your power pack needs replacement is some fella wrote-in.
He bought 500 Watt power pack to replace 300 Watt > thinking bigger was better.
Power pack burned out. Here's why:
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

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Open following for Power Pack troubleshoot checklist and warranty information and other tips to keep power pack working longer:
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.

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