Troubleshooting Guide Power Cable Low-Voltage Cable Wire Manager Power Supply Driveshaft Driveshaft Cover Master Motor (can be on either side) Controller Controller Cable Lifting Column Foot Stretcher Slave Motor (can be on either side) Top Mounting Plate SERIES 5 TABLES HOW THEY WORK Each Lifting Column contains a mechanical lift mechanism that requires an external force to operate. Lifting Columns and Motors are connected to and mechanically synchronized with each other through a telescoping Driveshaft assembly. Two individual electric motors a Master Motor and a Slave Motor provide torque to operate the Lifting Columns. The Master Motor controls all aspects of Table motion, and contains internal stops that define the top and bottom of the range of motion. The Slave Motor follows control signals sent from the Master Motor, and only follows what the Master Motor does. Slave Motors have no internal stops. Only two Motors are used to drive the Lifting Columns, regardless of whether the Table has two or three Lifting Columns. The Power Supply contains a power transformer. This converts high-voltage AC current from the wall outlet (120v/60Hz) to low-voltage 24v DC current, which powers the Motors. Only the main Power Cable carries high voltage. All other cables are low-voltage. The Controller is the user-interface to the Table, and directs all Table movements via the up-down buttons. Published 4/2016
READ THE ASSEMBLY DIRECTIONS AND USER GUIDE Many times, problems can be the result of improper assembly. Reference the Assembly Directions document to ensure the Table is assembled correctly. If so, reference the troubleshooting steps throughout this document. TROUBLESHOOTING PARTS KIT Having a spare part that is known to work will quickly lead to accurate identification of faulty components. Without this, it can be little more than guesswork. Steelcase strongly recommends that every dealer maintain a small kit of parts for troubleshooting purposes. This kit of parts should include: Table Bench 1. Lifting Column qty=2 Service Part no. 004233DSR 946910107SR 2. Master Motor qty=1 Service Part no. 004243DSR 004243DSR 3. Slave Motor qty=1 Service Part no. 004244DSR 004244DSR 4. Motor Hardware Package qty=1 Service Part no. 950500014SR 950500014SR 5. Low-Voltage Cable qty=1 Service Part no. 004263DSR 004248DSR 6. Controller qty=1 Service Part no. 841300000SR 841300000SR 7. Controller Cable qty=1 Service Part no. 004249DSR 004249DSR 8. Power Supply qty=1 Service Part no. 004246DSR 004246DSR 9. Power Cable qty=1 Service Part no. 004247DSR 004247DSR Always maintain a complete kit of troubleshooting spare parts that are known to work properly, to quickly identify the root cause of problems and resolve customer issues on the first try. TROUBLESHOOTING STEPS Step 1: Step 2: Step 3: Step 4: Check for power at the wall outlet; ensure Table is properly assembled and all cables are securely connected. Check all connections of Low-Voltage Cables. Check that the Power Cable is fully seated in the Power Supply. Check that the mounting bolt is installed through the front of the Master Motor. This deactivates the internal kill switch. (see Fig. 1, page 3) Check that the center Lifting Column on 3-leg (90º Corner) Tables is attached in the correct orientation.refer to the section on 90 Corner Tables in the Assembly Directions. COMMON PROCEDURES SYNCHRONIZING MOTORS AND LIFTING COLUMNS: The Lifting Columns and Motors of Series 5 Tables are synchronized mechanically. The Master Motor and all Lifting Columns must be in the lowest position before the Driveshafts are installed. If the Table will not go up or down all the way, and no clicking sounds from the Lifting Columns or other signs of damage are observed, the Lifting Columns and Master Motor may need to be synchronized. For ease of access, remove all loads from the Table, and flip the Table upside-down. Slide all Driveshafts out of all Lifting Columns, Motors and Gearboxes. With the Driveshafts removed, plug the Power Supply into the wall, and press the down button on the Controller. Operate the Motors all the way to the lowest position, at which point the Motors will stop. Unplug Power Supply from the power outlet. Push all Lifting Columns to their lowest position. Do not push too hard at the bottom of the range of motion; allow 1 8" of play before they hit full-bottom. Reinstall all Driveshafts. It may be necessary to lift up on the Lifting Columns slightly in order to align the hex openings in the Lifting Columns with the hex shafts of the Driveshafts. Once the Table has been properly reassembled, operate the Table all the way up and all the way down to confirm proper function. Refer to the Assembly Directions as necessary. 2
CHECKING LIFTING COLUMN GEARS: If a Lifting Column reaches a certain point in its travel and stops, a clicking sound may be heard. This could indicate broken gear teeth inside the Lifting Column. For safety and ease of access, remove all loads from the Table, and flip the Table upside-down. Remove the Stretcher, the Driveshaft and the Motor (if applicable) from the suspect Lifting Column. Hold the suspect Lifting Column assembly firmly in place on the floor on its glides. With both hands, grip the Top Mounting Plate and raise the Lifting Column all the way up, so that it is fully extended and at its highest position. Using an 8 mm hex socket, remove the four bolts that hold the Top Mounting Plate in place. Remove the Top Mounting Plate. While looking down at the gears inside the top of the Lifting Column, slowly push the Lifting Column down, observing the gears as they turn. If any gear teeth are damaged or missing, the Lifting Column must be replaced. Any faulty Lifting Columns must be replaced. There are no field-serviceable parts inside the Lifting Column. OBTAINING REPLACEMENT PARTS Contact your local Steelcase dealer to help identify and order Service Parts. If you need help, call 888.STEELCASE. PROBLEM ILLUSTRATIONS Fig. 1 Front-mounting bolt must be installed in Master Motor to deactivate internal kill switch. Fig. 2 Power Cable must be fully seated in Power Supply. Fig. 3 Damaged pins in the lowvoltage wiring connectors, housed in the master motors. BOLT MISSING WRONG DAMAGED 3
TROUBLESHOOTING: CAUSES AND SOLUTIONS PROBLEM POTENTIAL CAUSE POTENTIAL SOLUTION No Power amber light on Power Supply is not illuminated, or is blinking No power at wall outlet Power Cable not plugged in to wall outlet Check outlet with other device; check circuit breakers/fuses/wiring. Confirm proper cable engagement in wall outlet. Table will go neither up nor down Table goes up, but not down (or vice versa) Power Cable not fully seated in Power Supply Faulty Power Cable Table wiring not properly assembled Faulty Power Supply No power Table is severely overloaded Master Motor kill switch activated Master Motor locked (where equipped) Faulty Controller Faulty Controller Cable Damaged or faulty Low- Voltage Cable Faulty Slave Motor Faulty Controller Faulty Controller Cable Damaged or faulty Low- Voltage Cable Damaged pins inside multi-pin connectors (Low-Voltage Cables/ connectors) Check for proper cable engagement in Power Supply. (see Fig. 2, page 3) Inspect the Power Cable for damage; replace any damaged cables. Check that all cables are connected per the Assembly Directions. The Power Supply light should be glowing amber and not blinking. Swap with a Power Supply known to work. See above. Maximum Table capacity is 195 lbs. Overloading the Table could lead to damage that would not be covered by warranty. Tip: When calculating lifting capacity, subtract the weight of the worksurface. Install front motor mounting bolt per Assembly Directions; this deactivates the internal kill switch located inside the bolt hole at the front of the Master Motor housing. (see Fig. 1, page 3) Unlock Master Motor with provided key; if key is missing, replace with new Master Motor. Most Master Motors are not equipped with a lock. Swap with Controller known to work. Swap with Controller Cable known to work. Unplug Table from wall. Unplug each multi-pin connection point, and inspect the pins. Are they all straight and making good contact? If not, try using a pushpin to straighten them. Otherwise, replace any damaged cables. (see Fig. 3, page 3) Swap with Slave Motor known to work. Swap with Controller known to work. Swap with Controller Cable known to work. Carefully check the condition of the wiring harness of each Lifting Column. Swap with cable known to work. Use an ohm meter to check cables; resistance should be near zero. High resistance indicates a fault. Unplug Table from wall. Unplug each multi-pin connection point, and inspect the pins. Are they all straight and making good contact? If not, try using a pushpin to straighten them. Otherwise, replace any damaged cables. (see Fig. 3, page 3) 4
TROUBLESHOOTING: CAUSES AND SOLUTIONS PROBLEM POTENTIAL CAUSE POTENTIAL SOLUTION Table does not go through full range of motion;...and/or... Legs not synchronized (one leg is higher than the other) Motors and Lifting Columns not synchronized at Table assembly Faulty Lifting Column Synchronize the Motors and Lifting Columns. (see Common Procedures) If there is a clicking sound at any point in the travel of the Table, an internal gear may be stripped or missing teeth. (see Common Procedures) Replace any faulty Lifting Columns. Note: Be sure to explore the full range of travel. If one Lifting Column clicks at a certain point, push on the Table to help get it past that point, so that you can explore the full range of Table motion, because another Lifting Column may have the same problem at a different height. 3-leg Tables: Center Lifting Column moves in opposite direction vs. other Lifting Columns Table moves in opposite direction after up-down button is released Table movement is not smooth; Lifting Columns jerk or hop while raised or lowered Center Lifting Column installed in wrong orientation Lifting Columns are not parallel with one another, causing them to bind Faulty Lifting Column Refer to the section on 90 Corner Tables in the Assembly Directions. Reassemble Table per the Assembly Directions. Ensure Table is unloaded and level. Loosen (but do not remove) all of the screws attaching the Lifting Columns to the worksurface. Loosen the setscrews on the Stretcher. Operate the Table through a complete up-down cycle and then retighten setscrews and worksurface attachment screws. If the Lifting Columns are still binding, take everything off the Table, flip it upside-down and remove the screws completely. Run the Table through another up-down cycle. The position of the Lifting Columns may shift slightly; reinstall all screws in the adjusted position. If there is a clicking sound at any point in the travel of the Table, an internal gear may be stripped or missing teeth. (see Common Procedures) Replace any faulty Lifting Columns. Note: Be sure to explore the full range of travel. If one Lifting Column clicks at a certain point, push on the Table to help get it past that point, so that you can explore the full range of Table motion, because another Lifting Column may have the same problem at a different height. Visit Steelcase.com facebook.com/steelcase twitter.com/steelcase youtube.com/steelcasetv 4/2016 2016 Steelcase Inc. All rights reserved. All specifications subject to change without notice. Trademarks used herein are the property of Steelcase Inc. or of their respective owners. Part No. 939502307 Rev. C