Question about Hitachi EC12 Portable Electric 2hp Air Compressor, Oil Lubricated

1 Answer

Hitachi EC12 AC is "dead"

This AC "died" suddenly. It is as if it is not plugged in, however it is. No response to switch. Dead, dead, dead.
Appreciate any advice. Thanks.
Pat Patrick

Posted by on

  • pat6353 Apr 14, 2009

    Good idea regarding diagnosis. Checked all continuity and all OK. Looking at capacitor(s). Thanks for advice.

  • Anonymous May 22, 2009

    Hitachi EC 12 only used about 10 hours, looks brand new, took it to Hitachi service center and the service center said the motor was shot, and did not know what else was wrong with it until they got a motor. They thought that Hitachi would pay for any work that had to be done since it was like brand new. Then they said that Hitachi would not pay under them under any kind of warranty. So now it is in parts, took it too another Hitachi service center after speaking to Hitachi's Mr. Demetri, who advised me to take it there, since Demetri does lots of business with them. Now, this service center and Demetri are complaining that it is not put together in order to test. I explained to Hitachi's Mr. Demetri about three times that I am being told by both service centers that they cannot put the machine back together, since it is against the law. I told Hitachi's Mr. Demetri that Hitachi should help me out, since the machine has not performed as a machine. Hitachi's Mr. Demetri said that he would not do anything to help me out as in a "good faith effort" in order for me to be willing to ever purchase another Hitachi compressor. Any ideas, since Hitachi has wasted my time with their run around non solution.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 50 Answers

You should take the cover off where the pressure switch is (the on off switch) and see if any wires fell off the connectors. the white wire should go straight throu to the motor, then the black wire will go to the switch than the pressure switch then to the motor. if you are careful enough you could temperarly straight wire the black wire from the cord to the motor wire.

Posted on Apr 13, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

How much oil in an ec12 hitachi air compressor..... brand new. no oil. no manual.....

DO NOT FILL to the plug threads on this compressor!!! The dipstick has a mark and it is very near the end of the stick. Any more questions please email or repost.

Sep 22, 2011 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

Hitachi EC 12 2hp Air Compressor. Just get a buzz sound when plugged directly into 120v wall outlet. Piston and shaft turn freely. Have installed a new pressure switch. Just turned the compressor on...

Hitachi EC12 Air Compressor Parts : MASTERTOOLREPAIR.COM

Here is a site that says:
1. Are the capacitors good? (They get the motor going).
2. If they are, replace the stator, ($245)

If you don't find a good solution there, I would try taking it to a local motor rebuilder.

Dec 14, 2010 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

My Hitachi EC12 builds pressure, shuts off, then air escapes

I have the same compressor with the same problem. I have temporarily eliminated the thermal reset with a piece of 12 gauge hard wire and it runs just fine. However, I do want to replace it before the warm weather come to the north. I tested the draw at 15.5 amps and the reset was a 17 amp. I am told by someone with superior electrical background that I need to install a 20 amp thermal reset in it's place. I have found that mine runs best when plugged directly into a 20 amp circuit and when using an extention cord I have a 10 guage cord that will carry the load needed to run the EC12. I have also changed to 100% synthetic oil.

May 15, 2010 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

Hitachi EC12 plug it in and nothing happens. No noises....nothing. There is oil in the compressor and pump is moving freely.

Sure the outlet you plugged into is working, do not use an extension cord.

If there is power, then there is a black box, where the cord enters the unit., in here is the pressure switch, it tells the unit to work,
unplug the unit open it and see if the plate with the spring moves freely
and then try it again, if not you probably need a new one, I would contact
the company and see if there are problems with the unit and see what they will do for repair, or they might have a better option for troubleshooting this unit.

Feb 12, 2010 | Hitachi EC12 Portable Electric 2hp Air...

2 Answers

Its dead no led on switch on and no picture

Yes it has a AC fuse you can check it but I have not seen one the was open. I think your problem is in the SMPS.

May 18, 2009 | Hitachi 42 in. Plasma TV

2 Answers

Hitachi ec12 motor hums after drop in pressue

There should be a pressure switch adjustment under the cover of the switch remove the cover and reset.

Feb 03, 2009 | Hitachi EC12 Portable Electric 2hp Air...

3 Answers

Dead laptop

Check the ac adapter is the proper one for that laptop. Check the power jack is not damaged or loose. let laptop site without battery or power for a few hours. remove battery and retry power. try another ac adapter if that doesn't work, you may have a reset button but not likely to solve the problem. sounds like motherboard is damaged, or something blew.

Aug 27, 2007 | Compaq Presario M2000 Notebook

Not finding what you are looking for?
Hitachi EC12 Portable Electric 2hp Air Compressor, Oil Lubricated Logo

Related Topics:

297 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1383 Answers

Jim Thurston

Level 3 Expert

670 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Are you a Hitachi Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides