'%3e%3cpath%20d='M10%2010.5V17h12.5v5.5l-21%20.038V15l8.5-4.5ZM1%206h11M6.5%202H12M5.5%2022.5V19'/%3e%3cpath%20d='M21.21%2017.012%2020.14%201.5h-4.28l-1.07%2015.512M15.516%206.49h4.967'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='a'%3e%3cpath%20fill='%23fff'%20d='M0%200h24v24H0z'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e){kind=small}
ABB Adjustable Speed AC Drive ACS550-U1-157A-4
Need answers fast?
Explore the manual using AI.
The ABB Adjustable Speed AC Drive ACS550-U1-157A-4 is designed for efficient motor control in various industrial applications. This versatile drive enhances energy savings and operational performance, making it ideal for a wide range of automation tasks. Optimize your processes with ABB's reliable technology and advanced features.
Turn manuals into instant answers
with your AI-powered assistantTurn manuals into instant answers
with your AI-powered assistant
Manual for ABB Adjustable Speed AC Drive ACS550-U1-157A-4
Complete asset maintenance, one click away
Get instant access to all the maintenance information you need. Empower technicians to perform preventive maintenance with asset packages, ready to use right out of the box.
Documents & Manuals
Find all the essential guides in one place.
Tensioning Guide- Belt-diagram
- C-120 pulleys
+ 13 more
Work Order Templates
Pre-built workflows to keep your asset running smoothly.
- Daily Electrical System Inspection
- Replace Roller and Pulley
- Install Engine B-120
+ 29 more
Procedures
Integrate maintenance plans directly into your work orders.
- Motion Industries
- Applied Industrial Technologies
- Electrical Brothers
+ 5 more
Parts
Access the parts list for your equipment in MaintainX.
- Drive Motor
- B2 Rollers
- Tensioning System
+ 40 more
ABB Adjustable Speed AC Drive ACS550-U1-157A-4
Create an account to install this asset package.
Maintenance Plans for ABB Adjustable Speed AC Drive Model ACS550-U1-157A-4
Integrate maintenance plans directly into your work orders in MaintainX.
6 Monthly Heatsink Maintenance
Warning: Always remove power from the drive before starting the maintenance.
Is the environment dusty?
If the environment is dusty, increase the frequency of heatsink checks.
Heatsink fins free of dust?
If heatsink fins are not free of dust, follow the cleaning procedure.
Remove the cooling fan.
Blow clean compressed air (not humid) from bottom to top and simultaneously use a vacuum cleaner at the air outlet to trap the dust.
Note: If there is a risk of the dust entering adjoining equipment, perform the cleaning in another room.
Reinstall the cooling fan.
6 Yearly Main Cooling Fan Replacement
Warning: Only trained personnel should perform this procedure
Power removed from drive?
Screws removed from the fan?
Fan swung out on its hinges?
Fan cable disconnected?
Fan reinstalled in reverse order?
Power restored?
Sign off on the fan replacement
3 Yearly Internal Enclosure Cooling Fan Replacemnt
Warning: Ensure power is disconnected before starting the procedure
Power removed from the drive
Front cover removed
Fan lifted out and cable disconnected
Fan installed in reverse
Power restored
Sign off on the fan replacement
Parts for ABB Adjustable Speed AC Drive ACS550-U1-157A-4
Access the parts list for your equipment in MaintainX.
Ring Lug
CCL-2/0-38
Flange Mounting Kit
AC8-FLNGMT-R5
Ring Lug
54148
Ring Lug
YA2C-L4BOX
Ring Lug
54110
Ring Lug
CCL-2/0-38
Flange Mounting Kit
AC8-FLNGMT-R5
Ring Lug
54148
Ring Lug
YA2C-L4BOX
Ring Lug
54110
Ring Lug
CCL-2/0-38
Flange Mounting Kit
AC8-FLNGMT-R5
Ring Lug
54148
Ring Lug
YA2C-L4BOX
Ring Lug
54110
Unlock efficiency
with MaintainX CoPilot
MaintainX CoPilot is your expert colleague, on call 24/7, helping your team find the answers they need to keep equipment running.
'%20stroke-width='2.05034'/%3e%3cpath%20d='M43.601%2020.8897C43.2688%2019.252%2042.7312%2017.6627%2042.001%2016.1597'%20stroke='url(%23paint1_linear_4912_14668)'%20stroke-width='2.05034'/%3e%3cpath%20d='M40.001%2012.8882C38.8627%2011.3731%2037.516%2010.0265%2036.001%208.88818'%20stroke='url(%23paint2_linear_4912_14668)'%20stroke-width='2.05034'/%3e%3cpath%20d='M32.729%206.89053C31.2266%206.1604%2029.638%205.62282%2028.001%205.29053'%20stroke='url(%23paint3_linear_4912_14668)'%20stroke-width='2.05034'/%3e%3cpath%20d='M24.001%2014.8901V24.8901L32.001%2032.8901'%20stroke='url(%23paint4_linear_4912_14668)'%20stroke-width='2.05034'/%3e%3cdefs%3e%3clinearGradient%20id='paint0_linear_4912_14668'%20x1='4'%20y1='25'%20x2='44'%20y2='25'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint1_linear_4912_14668'%20x1='3.5'%20y1='20.8897'%20x2='44'%20y2='20.8897'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint2_linear_4912_14668'%20x1='3.5'%20y1='12.8882'%20x2='44.5'%20y2='12.8882'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint3_linear_4912_14668'%20x1='6.5'%20y1='6.89053'%20x2='43.5'%20y2='6.89053'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint4_linear_4912_14668'%20x1='5'%20y1='32.8901'%20x2='44'%20y2='32.8901'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3c/defs%3e%3c/svg%3e){kind=small}
Reduce Unplanned Downtime
Ensure your team follows consistent procedures to minimize equipment failures and costly delays.
'%20stroke-width='2.05034'/%3e%3cpath%20d='M46.667%2041.7231C46.667%2044.5079%2045.5607%2047.1786%2043.5916%2049.1478C41.6225%2051.1169%2038.9518%2052.2231%2036.167%2052.2231C33.3822%2052.2231%2030.7115%2051.1169%2028.7424%2049.1478C26.7732%2047.1786%2025.667%2044.5079%2025.667%2041.7231C25.667%2038.9384%2026.7732%2036.2677%2028.7424%2034.2985C30.7115%2032.3294%2033.3822%2031.2231%2036.167%2031.2231C38.9518%2031.2231%2041.6225%2032.3294%2043.5916%2034.2985C45.5607%2036.2677%2046.667%2038.9384%2046.667%2041.7231Z'%20stroke='url(%23paint1_linear_4912_14680)'%20stroke-width='2.05034'/%3e%3cpath%20d='M37.334%2035.8896V40.5563H42.0007'%20stroke='url(%23paint2_linear_4912_14680)'%20stroke-width='2.05034'/%3e%3cdefs%3e%3clinearGradient%20id='paint0_linear_4912_14680'%20x1='5'%20y1='52.2231'%20x2='51'%20y2='52.2231'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint1_linear_4912_14680'%20x1='5'%20y1='52.2231'%20x2='47'%20y2='52.2231'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint2_linear_4912_14680'%20x1='5'%20y1='40.5563'%20x2='52.5'%20y2='40.5563'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3c/defs%3e%3c/svg%3e){kind=small}
Maximize Asset Availability
Keep your assets running longer and more reliably, with standardized maintenance workflows from OEM manuals.
'%20stroke-width='2.05034'/%3e%3cpath%20d='M13.9995%2024.2231C13.9995%2029.1738%2015.9662%2033.9217%2019.4669%2037.4224C22.9675%2040.9231%2027.7155%2042.8897%2032.6662%2042.8897C37.6169%2042.8897%2042.3648%2040.9231%2045.8655%2037.4224C49.3662%2033.9217%2051.3328%2029.1738%2051.3328%2024.2231C51.3328%2019.2724%2049.3662%2014.5244%2045.8655%2011.0237C42.3648%207.52306%2037.6169%205.5564%2032.6662%205.5564C27.7155%205.5564%2022.9675%207.52306%2019.4669%2011.0237C15.9662%2014.5244%2013.9995%2019.2724%2013.9995%2024.2231Z'%20stroke='url(%23paint1_linear_4912_14674)'%20stroke-width='2.05034'/%3e%3cpath%20d='M32.6665%2017.2231V12.5564'%20stroke='url(%23paint2_linear_4912_14674)'%20stroke-width='2.05034'/%3e%3cpath%20d='M32.6665%2035.8898V31.2231'%20stroke='url(%23paint3_linear_4912_14674)'%20stroke-width='2.05034'/%3e%3cpath%20d='M37.9165%2020.7231V19.5565C37.9165%2018.9376%2037.6707%2018.3441%2037.2331%2017.9066C36.7955%2017.469%2036.202%2017.2231%2035.5832%2017.2231H29.7498C29.131%2017.2231%2028.5375%2017.469%2028.0999%2017.9066C27.6623%2018.3441%2027.4165%2018.9376%2027.4165%2019.5565V20.6018C27.4166%2021.1326%2027.5977%2021.6475%2027.9298%2022.0615C28.262%2022.4756%2028.7254%2022.764%2029.2435%2022.8791L36.0895%2024.4005C36.6077%2024.5157%2037.071%2024.8041%2037.4032%2025.2181C37.7353%2025.6321%2037.9164%2026.147%2037.9165%2026.6778V28.8898C37.9165%2029.5086%2037.6707%2030.1021%2037.2331%2030.5397C36.7955%2030.9773%2036.202%2031.2231%2035.5832%2031.2231H29.7498C29.131%2031.2231%2028.5375%2030.9773%2028.0999%2030.5397C27.6623%2030.1021%2027.4165%2029.5086%2027.4165%2028.8898V27.7231'%20stroke='url(%23paint4_linear_4912_14674)'%20stroke-width='2.05034'/%3e%3cdefs%3e%3clinearGradient%20id='paint0_linear_4912_14674'%20x1='5'%20y1='33.5'%20x2='50'%20y2='33.5'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint1_linear_4912_14674'%20x1='5'%20y1='42.8897'%20x2='48.5'%20y2='42.8897'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint2_linear_4912_14674'%20x1='5'%20y1='17.2231'%20x2='52.5'%20y2='17.2231'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint3_linear_4912_14674'%20x1='3.5'%20y1='35.8898'%20x2='50.5'%20y2='35.8898'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3clinearGradient%20id='paint4_linear_4912_14674'%20x1='3'%20y1='31.2231'%20x2='52'%20y2='31.2231'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23246CFF'/%3e%3cstop%20offset='1'%20stop-color='%232ED888'/%3e%3c/linearGradient%3e%3c/defs%3e%3c/svg%3e){kind=small}
Lower Maintenance Costs
Turn any technician into an expert to streamline operations, maintain more assets, and reduce overall costs.
Thousands of companies manage their assets with MaintainX
'%3e%3cpath%20fill='url(%23b)'%20d='M66.008%2080.068c-5.084-.786-9.763-3.834-12.442-8.68a16.942%2016.942%200%200%201-1.87-5.18c1.096.19%202.203.476%203.298.87%206.525%202.333%2010.836%207.68%2011.014%2012.99ZM51.47%2061.576c.488-5.524%203.62-10.716%208.847-13.597a17.132%2017.132%200%200%201%2011.335-1.882c-.798%208.145-7.43%2014.848-16.038%2015.599-1.417.119-2.799.07-4.144-.12Zm28.564-11.478a17.513%2017.513%200%200%201%203.727%204.62c4.608%208.335%201.584%2018.813-6.75%2023.409a16.988%2016.988%200%200%201-4.359%201.679%2019.624%2019.624%200%200%201-3.977-12.776c.346-7.561%204.942-13.931%2011.36-16.932Z'/%3e%3cpath%20fill='%23110F0D'%20fill-rule='evenodd'%20d='M142.831%2048.324h4.977V77.03h-4.977V48.324Zm27.278%2013.002c.322%201.048.453%202.263.453%203.62v12.073h-4.787V66.208c0-.75-.047-1.572-.154-2.143-.453-2.382-1.822-3.572-4.215-3.572-2.31%200-3.882%201.274-4.43%203.476-.143.596-.226%201.405-.226%202.25v10.8h-4.787V56.623h4.477v2.989c1.536-2.5%203.906-3.43%206.371-3.43%203.488%200%206.263%201.68%207.298%205.144Zm24.636%207.323c0%203.882-2.358%206.525-5.763%207.727-1.298.453-2.632.643-4.62.643h-10.169V48.324h9.085c1.691%200%203.156.143%204.049.38%203.465.93%205.727%203.68%205.727%207.335%200%202.441-.81%204.156-2.762%205.644%202.905%201.417%204.453%203.727%204.453%206.966Zm-15.634-8.656h4.584c1.024%200%201.917-.143%202.536-.417%201.215-.548%201.905-1.608%201.905-3.167%200-1.548-.643-2.572-1.845-3.132-.691-.31-1.762-.452-2.763-.452h-4.417v7.168Zm10.716%208.465c0-1.536-.893-3.37-3.227-3.893-.428-.095-1.036-.143-1.571-.143h-5.918v8.085h5.501c.56%200%201.429-.048%201.953-.167%201.94-.453%203.262-1.846%203.262-3.882Zm47.747-11.847-8.097%2020.408h-4.429l-8.109-20.408h5.191l5.192%2014.574%205.108-14.574h5.144Zm-20.218%2010.002c0%20.69-.036%201.262-.155%201.94h-15.943c.631%202.87%202.714%204.728%205.882%204.728%202.131%200%203.607-.882%204.703-2.525h4.87c-1.762%204.144-5.204%206.692-9.657%206.692-6.084%200-10.537-4.858-10.537-10.49%200-6.108%204.524-10.776%2010.335-10.776%206.239%200%2010.442%204.954%2010.502%2010.43Zm-4.763-1.405c-.333-2.846-2.643-4.858-5.691-4.858-2.894%200-5.287%201.929-5.621%204.858h11.312Zm-72.667%203.44c0%204.787-3.287%208.371-9.419%208.371H119.363V64.66c-1.917.274-3.87.69-5.811%201.238l4.537%2011.121h-5.418l-3.596-9.585c-5.144%202.084-10.085%205.216-14.217%209.585h-4.786L101.8%2048.312h4.56l5.68%2013.883a44.112%2044.112%200%200%201%207.323-1.774V48.312h9.084c1.703%200%203.156.143%204.061.393%203.453.929%205.727%203.667%205.727%207.323%200%201.917-.738%204.179-2.81%205.691%203.06%201.56%204.501%204.025%204.501%206.93Zm-15.634-8.667a62.664%2062.664%200%200%201%202.06-.036c1.703.012%203.239.131%204.608.37%201.441-.549%202.357-1.727%202.357-3.537%200-1.941-.881-3.144-2.488-3.667-.548-.18-1.358-.286-2.322-.286h-4.215v7.156Zm-16.55%203.905-3.715-9.894-6.394%2016.502c2.833-2.595%206.263-4.858%2010.109-6.608Zm27.254%204.74c0-2.775-3.131-4.347-8.513-4.418-.715%200-1.441.011-2.191.047v8.252h5.918c2.548%200%204.786-1.37%204.786-3.882Z'%20clip-rule='evenodd'/%3e%3c/g%3e%3cdefs%3e%3clinearGradient%20id='b'%20x1='51.47'%20x2='85.916'%20y1='62.946'%20y2='62.946'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%23CD9F28'/%3e%3cstop%20offset='1'%20stop-color='%23ECD80B'/%3e%3c/linearGradient%3e%3cclipPath%20id='a'%3e%3cpath%20fill='%23fff'%20d='M51.47%2045.728h186.104V80.14H51.47z'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
More from ABB
Explore Other Assets
© 2025 MaintainX. All rights reserved.