Maestro PRO Troubleshooting Guide

<h1 style='margin: 0in;line-height: normal;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Maestro PRO Troubleshooting Guide</h1>
This article provides troubleshooting steps for a Lutron Maestro PRO Dimmer (MA-PRO).
 
This article is expected to take 5 minutes to complete.
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<h2 style='margin: 0in;line-height: 17.65pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Knowledge Article Contents:</h2>
Before You Begin
<a target='_self' href='#Anchor1'>LED Lights Do Not Dim</a>
<a target='_self' href='#Anchor2'>LED Lights Flicker or Buzz When Dimmed</a>
<a target='_self' href='#Anchor3'>Indicator Lights are Blinking</a>
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<h2 style='margin: 2pt 0in 0in;line-height: 16.05pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Before You Begin</h2>
Confirm the Maestro PRO Dimmer is installed properly by reviewing the installation resources in the links below. Click on the link below for the application you are troubleshooting:
<p style='box-sizing: border-box;margin: 0px;padding: 0px;color: rgb(85, 85, 85);font-family: HelveticaNeue_Regular, Arial, Helvetica, sans-serif;font-size: 14px;white-space: normal;background-color: rgb(255, 255, 255);'><img src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; alt='Single-pole diagram' title='Single-pole diagram' width='42' height='36'></img> <a style='box-sizing: border-box;color: rgb(20, 86, 174);text-decoration-line: none;padding: 0px;margin: 0px;line-height: 21px;' target='_blank' href='https://webtools.lutron.com/wiringwizard/us/en?id=r562&p=q1,q433:a2… style='box-sizing: border-box;font-size: 20px;'>Single-pole install (for lights controlled from one switch)</a>
<p style='box-sizing: border-box;margin: 0px;padding: 0px;color: rgb(85, 85, 85);font-family: HelveticaNeue_Regular, Arial, Helvetica, sans-serif;font-size: 14px;white-space: normal;background-color: rgb(255, 255, 255);'><img src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; alt='3-way diagram' title='3-way diagram' width='62' height='36'></img> <a style='box-sizing: border-box;color: rgb(20, 86, 174);text-decoration-line: none;padding: 0px;margin: 0px;line-height: 21px;' target='_blank' href='https://webtools.lutron.com/wiringwizard/us/en?id=r563&p=q1,q433:a2… style='box-sizing: border-box;font-size: 20px;'>Three-way install (for lights controlled from two switches)</a>
<p style='box-sizing: border-box;margin: 0px;padding: 0px;color: rgb(85, 85, 85);font-family: HelveticaNeue_Regular, Arial, Helvetica, sans-serif;font-size: 14px;white-space: normal;background-color: rgb(255, 255, 255);'><img src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; alt='Multilocation diagram' title='Multilocation diagram' width='98' height='36'></img> <a style='box-sizing: border-box;color: rgb(20, 86, 174);text-decoration-line: none;padding: 0px;margin: 0px;line-height: 21px;' target='_blank' href='https://webtools.lutron.com/wiringwizard/us/en?id=r564&p=q1,q433:a2… style='box-sizing: border-box;font-size: 11pt;line-height: 15.6933px;font-family: Helvetica, sans-serif;'>Multi-location install (for lights controlled from three or more switches)</a> 
<p style='box-sizing: border-box;margin: 0px;padding: 0px;color: rgb(85, 85, 85);font-family: HelveticaNeue_Regular, Arial, Helvetica, sans-serif;font-size: 14px;white-space: normal;background-color: rgb(255, 255, 255);'>Note: For three-way and multi-location installations the remaining switches must be replaced with the Maestro Companion Dimmer (model # MA-R / MSC-AD). The MA-PRO can be installed in any location. 
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<h2 style='margin: 2pt 0in 0in;line-height: 17.65pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'><a id='Anchor1' target='_blank'></a>LED Lights Do Not Dim</h2>
If your LED lights do not dim, or they flash/strobe when dimming them, confirm the LED light that the dimmer is controlling is dimmable.
<p style='margin: 0in 0in 8pt;line-height: 11.75pt;background: white;box-sizing: border-box;font-variant-ligatures: normal;text-align: start;text-decoration-thickness: initial;text-decoration-style: initial;text-decoration-color: initial;font-size: 12pt;font-family: 'Times New Roman', serif;'>Not all LED lights are dimmable. Look for wording like “Not for use with a dimmer” or “non-dimmable” on your LED to determine if it is a non-dimmable light. LED dimmers require dimmable bulbs to function properly. 
<p style='margin: 0in 0in 8pt;line-height: 11.75pt;background: white;box-sizing: border-box;font-variant-ligatures: normal;text-align: start;text-decoration-thickness: initial;text-decoration-style: initial;text-decoration-color: initial;font-size: 12pt;font-family: 'Times New Roman', serif;'>Refer to the <a href='https://www.lutron.com/en-US/Pages/LEDCompatibilityTool/Compatibility.a…; target='_blank'>Lutron LED Compatibility Tool</a> for a list of dimmable LED bulbs.
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<h2 style='margin: 2pt 0in 0in;line-height: 17.65pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'><a id='Anchor2' target='_blank'></a>LED Lights Flicker or Buzz When Dimmed</h2>
If your LED lights flicker, buzz, or hum when dimmed, an incompatibility between the dimmer and LED bulb may be causing the issue.
<ul style='margin-top: 0in;margin-bottom: 0in;'><li style='margin: 0in 0in 0in 24px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Test the dimmer with an incandescent bulb or an LED from the <a target='_blank' href='https://www.lutron.com/en-US/Pages/LEDCompatibilityTool/Compatibility.a… LED Compatibility Tool</a>. If the issue persists, contact Lutron Technical Support for assistance.</li><li style='margin: 0in 0in 0in 24px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>If the flicker, buzzing, or humming stops when using a different bulb, we recommend replacing the existing LEDs with ones from the Finder Tool.</li><li style='margin: 0in 0in 0in 24px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>If the lights the dimmer controls only flicker near the high or low end of the dimming range, adjust the dimmer’s high-end or low-end trim setting:</li></ul>
 
<h3 style='margin: 2pt 0in 0in 0.25in;line-height: 16.05pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Low-End Trim Programming</h3>
The low-end trim adjustment increases or decreases the minimum light level of the dimmer. It helps to stop the lights from flickering when the dimmer is set to its lowest brightness. It also can prevent the lights from dropping out (turning off before the dimmer dims all the way down).
Follow the steps below to adjust your Maestro PRO Dimmer’s low-end trim:
 
<img alt='A hand holding a deviceDescription automatically generated' height='119' width='114' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…;
 
<ol style='margin-top: 0in;margin-bottom: 0in;'><li style='margin: 0in 0in 0in 72px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Press and hold <img alt='A black circle with white letter tDescription automatically generated' height='15' width='15' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; and <img height='14' width='15' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; until a Dimmer Indicator Light (DIL) blinks, then release. The lights will turn off and back on to the low end.</li><li style='margin: 0in 0in 0in 72px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Press <img height='14' width='15' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; or <img height='14' width='15' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; to adjust the light level until the lights no longer flicker.</li><li style='margin: 0in 0in 0in 72px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Tap <img alt='A black circle with white letter tDescription automatically generated' height='15' width='15' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; to save this setting.</li><li style='margin: 0in 0in 0in 72px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Tap <img alt='A black circle with white letter tDescription automatically generated' height='15' width='15' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; again to turn the lights off.</li><li style='line-height: 11.75pt;background: white;margin: 0in 0in 8pt 72px;font-size: 11pt;font-family: Aptos, sans-serif;'>Press <img height='14' width='15' border='0' src='https://lutron.my.salesforce-sites.com/publicknowledge/servlet/rtaImage…; once to turn the lights on to the low end.</li></ol>
If the lights do not turn on, or continue to flicker, repeat these steps until the lights turn on and remain stable. 
 
Instructions on High-End, Phase Selection, and additional features can be found in the <a href='https://assets.lutron.com/a/documents/048703.pdf' target='_blank'>Maestro PRO Dimmer Advanced Programming Guide</a>.
 
<h3 style='margin: 2pt 0in 0in 22.5pt;line-height: 16.05pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>High-End Trim Programming</h3>
The high-end trim adjustment increases or decreases the maximum light level of the dimmer. It is also used to stop the following symptoms of LED incompatibility:
<ul style='margin-top: 0in;margin-bottom: 0in;'><li style='margin: 0in 0in 0in 72px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Lights flicker when the dimmer is at full brightness.</li><li style='margin: 0in 0in 0in 72px;line-height: 11.75pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Lights experience a sudden pop-on when turning on.</li><li style='line-height: 11.75pt;background: white;margin: 0in 0in 8pt 72px;font-size: 11pt;font-family: Aptos, sans-serif;'>Significant delays when turning on your lights.</li></ul>
 
<h3 style='margin: 2pt 0in 0in;text-indent: 22.5pt;line-height: 16.05pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'>Phase Selection</h3>
Confirm that the dimmer is in the correct phase for the lighting load being used. The MA-PRO allows for selection of forward-, auto, or reverse- dimming phase. The Phase Selectable dimmer default powers up in reverse-phase. For low voltage applications the neutral connection is required on the dimmer and reverse-phase is used for ELV Electronic Low Voltage and forward-phase is used for MLV Magnetic Low Voltage applications.
Certain LED fixtures may perform better on forward or reverse-phase, consult the lighting manufacturer for more information on the preferred dimming protocol.
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<h2 style='margin: 2pt 0in 0in;line-height: 17.65pt;background: white;font-size: 11pt;font-family: Aptos, sans-serif;'><a id='Anchor3' target='_blank'></a>Indicator Lights are Blinking</h2>
The Maestro PRO dimmer is capable of displaying blink codes. Please visit "<a href='https://support.lutron.com/us/en/product/maestro/article/troubleshootin…; target='_blank'>The Maestro Dimmer is Blinking</a>" article for more information.
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