Question about Ingersoll Rand UP6-20-125 120 Gallon Rotary Screw Air Compressor, 20 HP, 125 PSI, 83 CFM

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It keeps shutting down under a code 2 which is motor overload

It keeps shutting off under a code 2 whole system seams to be very hot to touch

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Make sure oillevel is ok make sure cooler is clean make sure air is going trough cooler(fan works) also means doors and panels closed. if that is all correct, there have to come out a lot of hot coolingair out of the machine. otherwise the thermostatic 3 way valve doesnt function open for about 1/2 inch or replace

Posted on Feb 11, 2010


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Does it then restart and do the same thing? If so, it sounds like it is going off on the internal overloads. Make sure the blower motor is clean and free of dirt and dust build up. It may be that it is not getting enough air flow to keep it relatively cool. Does the motor feel hot to the touch?

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The motor has a manual reset thermal overload protector switch. If the motor overheats for any reason, the overload protector will shut off the motor. The motor must be allowed to cool down before resetting the overload switch and restarting. It is located on the motor housing on the side opposite where the pump and hose connections are. The reason this switch shuts off is because of low voltage problems caused by either a too low amp rating on the circuit it's plugged into or by using an extension cord. It is always safer and better for the motor to run longer air hoses than to use extension cords.

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1 Answer

Motor is hot?

Which motor is hot...compressor or fan?
Also need to know the model number.
Is this a 3-phase or single-phase unit?

Let's assume it is the compressor...Is it so hot that you can't touch it for more than a second or two? Is the compressor shutting down on internal thermal overload?

Compressor body hot can be caused by a number of things:
1. Low charge (the freon acts as a coolant for the compressor).
2. Electrical imbalance (3-phase only). (check line-to-line voltages)
3. Bearings in compressor failing (check amp draw).
4. Condenser dirty or airflow blocked in some way.
5. Condenser fan(s) not running or running backwards.
6. If water cooled condenser then water flow problem.

Hope this helps you get started.

If this helps you, please select YES to the first two ratings questions. Thank you, and Good Luck.

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Generally if the motor shuts off it is because of the overprotector on the motor opening up to save the motor.When the motor cools down the overload will close and the motor will work again.

If the unit is getting so warm the motor is shutting off check to make sure the rollers are working properly and moving freely.

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1 Answer

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Hi, did you connected plug correctly, green, (ground) black, (hot) white, (neutral) facing your (any) receptacle, pin on right, hot, pin on left, neutral, pin on top, ground, connect plug in like manner, check plug for correct wiring, or could be your motor overload relay, if your days are hot, overload relay will keep compressor off. put you thermostat to max, and try. or maybe you got low voltage, in building, common during summer months, low voltage sometimes damages, motor overload relay, and wiindings. check receptacle with digital multi-tester, check for accurate voltage, some motors won't start when, voltage drops to low, but fans would. unplug for an hour, and retry, then let me know what happened, then i could tell you exactly what's problem are. good luck.

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the batteries could be the problem, is it possible to try some other batteries, silly question , how steep is this hill ? remember scooters cannot climb steep hills as the motor will shut down due to the increased load.

1 Year old batteries ok ? but if they get used on a non daily basis and are not fully charged after use, I would question the batteries but again the motor could be overloading,

How much do you weight ? sorry for the personal question but it all loads the motor and that increases the current and that will cause the motor controller to shut it down.

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