Question about Ingersoll Rand Stationary Air Cooled Rotary Screw Compressor 10 Hp, 35 Cfm At 125 Psi, Model# Ep

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I have a IR, SSR UP6-15C compressor that I am

I have a IR, SSR UP6-15C compressor that I am running in constant speed control. It used to unload at 125 and load at 110. Now it is unloading at 116 and loading at 103. I have adjusted the differential pressure switch but nothing changes, Is the diff pressure switch only used in start stop control? Does the blowdown valve control the pressure and is non adjustable? If so, a new blowdown valve may solve my issue. Thanks John

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Posted on Jan 02, 2017

  • 104 Answers

SOURCE: Compressor short cycles during operation. (load /

The pressure switch has an adjustment for the low pressure cut in and the high pressure cut out. If the pressure range is set too close the cycles will be short. You need to work out which setting is wrong by looking at the pressure guage when it is cycling and adjust the pressure switch accordingly.

Posted on Sep 06, 2009

dee73ten
  • 40 Answers

SOURCE: WILL NOT BUILD PRESSURE ON LOAD. SOUNDS LIKE A

Not the valve is not closing but the valve is not open. Check solenoid valve for the inlet valve.

Posted on Aug 23, 2010

  • 205 Answers

SOURCE: i have a 5SR EP50SE

The blow down is a normally open valve so there will be no voltage when unloaded. When voltage is applied the blow down valve closes and the load solenoid opens allowing air to the inlet valve which should open. I suspect you have a bad load solenoid. If it leaks by it will keep the inlet valve open to some degree depending on how bad its leaking. If this is an older EP50SE you may have a spring in the bottom of the inlet valve that has broken. then there is not enough pressure to close the inlet valve. These are two common problems with this unit. Also if you look inside the controller panel there should be a wiring diagram. It should show 1SV and 3SV wired together. 1SV is the load solenoid and 3SV is the blow down valve. There is no unload solenoid. There is also a solenoid for line / sump pressure and a modulation solenoid.

Posted on Mar 12, 2011

  • 1 Answer

SOURCE: I have a SSR-EP60 air

If the pressure continues to rise, the inlet valve is not closing completely. Remove the top of the air cleaner box and look down at the inlet valve butterfly. When the compressor is down or unloaded, the valve should be held closed by an internal spring in the air cylinder. If it's not, the mounting stud on the bracket may have come loose and moved, or more likely the spring in the air cylinder actuator is broken.

This actuator has gone thru at least 3 revisions. I just replaced the cylinder on our EP60 because the spring had broken in two places and wouldn't come anywhere near closing the valve.

Posted on Jun 14, 2011

nickwharton1
  • 1 Answer

SOURCE: I installed a used Ingersoll-Rand

I've a ingersoll compressor ssr ep 20 which is shutting down on high airent temperature.

Posted on Jul 11, 2012

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I have a Model# SSR-EP10 IR compressor that wants to start loaded, if I release the load it fills up and then cuts off with out going to unload and then when it calls for air it try to start loaded.


How are you unloading it? There is an unloader valve that is usually a manual lever connected to the regulator. 0531-051 - DIAPHRAGM,UNLOADER for Ingersoll Rand compressors

May 24, 2015 | Air Tools & Compressors

1 Answer

I have SSR up series 15-30hp air copressor.The compressor will start and build pressure until the pressure gets to a certain reading on the gauge and the unloader valve begin to unload the air out. But the...


The compressor will run stop start or load unload. There is a switch for this. Make sure the right mode is selected.stop start for light use. Load unload for heavy. This mode keeps the starting and stopping to keep from burning up the motor. That is rated by stops per hour. They shouldnt be more than 10 times per hour

Dec 30, 2014 | Air Tools & Compressors

1 Answer

We have a IR model UP6-25-125 Constantly unloading like it has a stuck solenoid. Any suggestions?


Hi rejohnson964...
Repair or replace your unloader valve...it is causing your trouble.
Please take time to rate me

Sep 19, 2011 | Ingersoll Rand Air Tools & Compressors

1 Answer

Compressor UP6 25 125, runs all the time but is only under load for a short time, should it shut down between loads?


This unit will shut down if unloaded for a set period of time. Usually 5 to 10 minutes. This time could be longer if some one has changed it from the factory setting. There is a timer in the control box that starts counting down when the unit unloads. If it stays unloaded long enough for the timer to count down the unit will stop until the air pressure drops to the low set point on the pressure switch. It will then start up. If the unit loads before the counter counts down the timer starts from the beginning when it unloads again. This cycle continues until you manually shut it down or you stop using air long enough for the timer to reach Zero and shut down.

Apr 22, 2011 | Ingersoll Rand UP6-25-125 120 Gallon...

1 Answer

Hard starting does this model have an unloader


There are two types of unloaders used on IR compressors. One is oil pressure controlled, and second is manually activated for starting. According to the photo and model number provided, yours is manually operated. Follow air line from compressor to tank. The pilot valve (brass valve) between airline and tank is a multi-function component. There is a flip leaver or pull ring w/ hold that unloads the compressor by venting air thru small muffler. The valve also contains the check-valve holding pressure in the tank, a means of adjusting pressure and controlls throttle for engine. For easy start, flip leaver upright and start; to run, flip leaver to right angle of stem.

Nov 19, 2010 | Ingersoll Rand 2475F13GH Ir Stationary...

2 Answers

Ingersoll Rand SSR compressor shuts down loaded or unloaded with no alarm, and then shows ready to start . Will not run more than a few minutes either loaded or unloaded. installed meter on incoming power...


When it shuts down, press DISPLAY SELECT button once and use the up down arrows to see the code just before shutdown.

HIGH AIREND TEMP

HIGH AIR PRESSURE

LOW SUMP PRESSURE

PRESSURE OR TEMP SENSOR FAIL

CHECK MOTOR ROTATION

MOTOR OVERLOAD

FAN MOTOR OVERLOAD

STARTER FAULT

I am assuming this has a Intellisys controller.

Aug 25, 2009 | Air Tools & Compressors

3 Answers

Compressor is loading without unloading


hi mate it could iver be a faulty load solenoid valve or the unloader its self is jaming up inside which means you have to strip it away from the air end and replace all the seals inside or give it to a specialst we are compressed air engineers we could sort it i will leave you a number call us anytime 07958354730 or call 01752 848801 many thanks

Jun 08, 2008 | Kano Technologies Atlas (K752HCDR) DVD+R...

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