MICRO-AIR EasyStart Advanced Troubleshooting
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MICRO-AIR EasyStart Advanced Troubleshooting

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EasyStart is designed for excellent reliability and durability. Every EasyStart is tested on a
compressor before it leaves Micro-Air to ensure it will work when delivered. This document is provided
in the event there is a problem with installation or operation, to help determine if EasyStart is the cause
of the problem.
This document is separated into sections that guide troubleshooting from new installations to
existing systems. Understanding the short cycle timer is important to troubleshooting. Read that section
then jump to the section that applies to your situation.
**Note: Some testing in this document involves testing with live AC utility
power. This power can cause serious or fatal injury if mishandled. This testing
should be done only by qualified and trained service persons.
Advanced EasyStart Troubleshooting

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Summary of Contents for MICRO-AIR EasyStart

  • Page 1 EasyStart is designed for excellent reliability and durability. Every EasyStart is tested on a compressor before it leaves Micro-Air to ensure it will work when delivered. This document is provided in the event there is a problem with installation or operation, to help determine if EasyStart is the cause of the problem.

  • Page 2: Table Of Contents

    Open compressor overload ........................9 Stall................................9 Wrong line voltage ..........................10 No signal from start winding ........................10 Testing for a no signal problem ......................10 Additional power interruption fault information ..................11 Common Causes ..........................11 ©2020 Micro-Air Corp. Rev 1.5...

  • Page 3: The Short Cycle Timer

    Troubleshooting New Installations If your EasyStart is new and it has never run on shore or AC utility power and you can’t get it running this section is the place to start. Most times installers have already checked the wiring several times by the time they read this.
  • Page 4 4. Is the brown wire from EasyStart connected to the compressor R winding only? On the top of the compressor there is a cover held by a single hex nut that looks similar to the one pictured below: Some caps have the windings marked on the top as shown while others have markings inside the cap.
  • Page 5 Follow the second wire and disconnect it from its connector. You can remove the PTC completely if desired as it is no longer used. 6. Is the white wire from EasyStart connected to L2 on the correct terminal on the run capacitor? In most installations (see exceptions below) the white wire from EasyStart will be installed on a terminal group on the run capacitor.

  • Page 6: Troubleshooting Generator Only Problems

    EasyStart takes itself out of the circuit after the start is complete. It does remain active monitoring for faults that could indicate a generator overload. If it detects these faults, EasyStart will shut down the compressor and wait 5 minutes before restarting.

  • Page 7: Testing Your Generator

    3. Start capacitor in EasyStart is the wrong size. Call Micro-Air for other systems after making the above checks. Please have your compressor voltage, model, BTU rating and original start capacitor size available when you call.

  • Page 8: Troubleshooting Previously Working Systems

    This is done by connecting an AC voltmeter to the black and white leads connected to EasyStart. The connection will vary by installation but most times, the L2 connection can be made at the run capacitor “C” or common terminal. The other connection to the black wire should be made at a convenient spot such as the contactor, relay, or junction where it intersects the compressor “C”...

  • Page 9: Trouble Lights Are On

    AC mains plug, a problem with the distribution panel, problem at the outlet or plug, or a problem with the wiring. There is no problem with EasyStart. If there is power and after 10 seconds there is no lights inside EasyStart, EasyStart must be returned for service. Follow the instructions at https://www.microair.net/pages/service...

  • Page 10: Wrong Line Voltage

    This connection will give only the very low resistance of the common to start winding connection when it is properly connected. The flow of this path is down the orange EasyStart wire to the run capacitor. Through the capacitor terminal to the start winding. Through the start winding wire to the start winding.

  • Page 11: Additional Power Interruption Fault Information

    “if I put it back to factory it will work” many times. Please know that if EasyStart is reporting there is a problem with interrupted power, there is a problem that needs to be addressed.

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