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©2020 Micro-Air Corp.
Rev 1.5
Troubleshooting Previously Working Systems
If your EasyStart was working as expected on generator, inverter, and utility power then this is the
section to start. Do all testing on AC mains or shore power.
1.
Are all the connections still good? Check all four connections to EasyStart. Pull on crimp
joints and check spade connection tension to verify they are all good connections.
2.
If your compressor is running for a short time on generator then shutting off, follow the
instructions in section: Testing your generator. Be sure the running current does not exceed
the maximum current the generator can deliver.
3.
Go to the “Trouble Lights” section and check the state of EasyStart.
Checking Trouble Lights
EasyStart models vary in style as the product has developed. Very early models had black boxes
and no indicator lights. The models were changed to a beige colored box with a solid lid. A short time
later the lids were changed to clear to permit viewing the trouble lights without removing the cover.
Bluetooth models do not have trouble lights and can be tested using an app on a smart device. If your
model has trouble lights, please proceed with this section.
Two styles of indication are available on trouble light models. Early styles have three lights
labeled D12, D22 and D23. Later models have flashing lights. These lights will flash from one to seven
times with a pause in between.
Remove power for five minutes to check the trouble lights. This allows the timer in EasyStart to
expire so the next start will occur right away. Next have a helper apply power while you are touching the
compressor. Be sure the thermostat is set to turn in the compressor. The fan should start and the
compressor should operate a few seconds after the fan. If the compressor fails to start then look at the
trouble lights.
No trouble lights on
If no lights are on or you are getting a stalled compressor indication, power to EasyStart should
be verified. 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” winding
terminal.
Turn off auto ranging on your digital meter and set it to read ac line voltage. Turn off power to
the compressor for 5 minutes then connect your meter. Have an assistant apply power and set the
thermostat to start the compressor. When the thermostat turns on the compressor you should see full
line voltage at the measurement points. A few seconds later the compressor should attempt to start.
Note the lowest voltage seen on the meter when the compressor is starting.
If no voltage or low voltage is measured then the thermostat is not turning on the compressor.
Check your supply, breakers and thermostat for problems. Low voltage is anything less than full line
voltage. There is no problem with EasyStart.
If the voltage is line voltage then drops more than 10% during the start such as a 120-volt line
dropping below 108 volts, then there is a problem with the supply. This can be a problem at the source
