Intermatic Malibu 300W Power Pack Transformer ML300RTW - Answered Questions & Fixed issues


You can buy the Malibu Photocell Low Voltage sensor on eBay. Go to eBay and search "Malibu Photocell Sensor" and you should see it. Or search eBay item number 371829265599

Intermatic... | Answered on Jan 05, 2017 | 739 views


Try connecting a lamp (correct voltage, etc) directly to the transformer. Most likely, the wire from the transformer to your lights is broken... The reset button can't reset anything, if there's nothing wrong there.

Intermatic... | Answered on Jun 16, 2016 | 462 views


Following link shows photocell switch for ML300 series power pack
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html#wire

Gene

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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Jul 19, 2015 | 544 views


They make a photocell for the ML300
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html#wire

Gene

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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Jul 19, 2015 | 297 views


Installation tips and troubleshoot steps on following link:
Read installation tips and make sure your installation is correct now...
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html#install

These low voltage power packs are actually transformers... larger version of the transformer you plug into wall to recharge cell phone...
They are made for specific loads and can be damaged in variety of ways. Generally, there is no repair for damaged transformer..
Gene


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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Feb 12, 2015 | 135 views


http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

I don't think they post schematic for the transformer
But generally, the primary coil receives 120Volt AC input from household electrical outlet
And the secondary coil produces 12Volt AC output for the low voltage lights.
The 'coil' is a coil of insulated wire wrapped around a metal core. Two coils set side by side create a transformer... when primary is energized, the secondary responds to the magnetic field caused by primary core... resulting in a current that flows on the secondary coil.
Output voltage on secondary coil is determined by the number of wraps and diameter of wire.

Some transformers offer a choice of secondary output... Kichler for example... you can select 12-13-14-15 Volt AC output
This is achieved by the way the secondary coil is wrapped.... for less voltage a wire is tapped at one point on the coil... for more voltage, a wire is tapped at another point on coil. This gives the user several wire choices to connect the lights.

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Aug 12, 2014 | 304 views


Intermatic power pack has 5 year warranty, while malibu has 1 year warranty:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
Open link above for installation tips and troubleshoot
Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Aug 12, 2014 | 454 views


Plug power pack into cheap wall timer, remove trippers from power pack dial, set power pack override to ON
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Aug 12, 2014 | 460 views


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

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Aug 12, 2014 | 84 views


Replace transformer.... it should be slightly warm but never hot
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Gene
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Aug 12, 2014 | 73 views


Doesn't seem to me it could be the transformer/controller as it either puts out voltage and current or it doesn't. I can't think of any way it would selectively operate certain bulbs. You said wiring is fine, but you should check voltage at the end of the line to ensure it's getting close to 12 volts all the way down the wiring. If not, there may be a problem between transformer and misbehaving bulbs. Doesn't seem likely that 5 bulbs would go out a once, but that would be all that's left.

Intermatic... | Answered on May 15, 2014 | 109 views


My experience has shown that this is nearly always a connection and/or wire corrosion issue. Be certain that all connections are clean-if not clean with fine grit sandpaper or replace. Remember these devices are exposed to the weather on a continuous basis.

Intermatic... | Answered on Nov 04, 2013 | 57 views


How about this solution:
Don't use the photo eye from Intermatic, since unsure if older timers might not be made for that feature.
Instead, plug power pack into photo-eye timer.
Or plug power pack into ordinary wall timer:
Copy following links for resources:
http://waterheatertimer.org/Woods-timers-and-manuals.html#outdoor
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#TN

http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
Call Intermatic and they might have solution for photo eye.
Gene
hh

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Oct 07, 2013 | 221 views


Is this a question?

Intermatic... | Answered on May 12, 2013 | 25 views


Splice the wire? Replace photocell?
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
http://waterheatertimer.org/How-to-install-and-troubleshoot-photo-eye.html

What photo eye do you have? Intermatic ML series, or orher?
Where is the short?
What makes you think there is a short?
Have you tested the gfci?

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Apr 06, 2013 | 60 views


Hello jmanis

12 Volt AC
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

The bulbs for low voltage are labeled 12Vac

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Apr 01, 2013 | 63 views


Copy following link for installation tips, and instructions:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Feb 2013. Add a comment and say what is going on so far.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Intermatic... | Answered on Mar 01, 2013 | 31 views

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