When working with height-adjustable consoles, Linak actuators have more than 90 error codes that can show up on the digital display of your desk panel. This height adjustment troubleshooting guide will help you to spot and fix issues with Linak actuators. The first steps in fixing the problem are to go over the standard troubleshooting procedures. To that end, you must keep in mind all the components of a height-adjustable control console, as described below.
Desk leg (DL) – The lifting columns, typically with powder-coated steel profiles, are responsible for lifting the working load of the application.
Control box (CBD6S) – Both the computer and power supply of the system.
Desk panel (DP) – The user interface. Depending on the model, it is used to activate the application, set memory positions, display the height, display error codes, connect to mobile apps, and give reminders to the user.
Motor cable – Transmits low voltage power (18-39 VDC) from the control box to the desk legs, and also transmits PIEZO signals when available from the desk leg.
Mains cable – Transmits high voltage power (120 VAC in US and Canada) to the control box.
Standard troubleshooting procedures for Linak actuators in height-adjustable control consoles
P1 – Initialize the control box (“reset”)
STEP 1. Hold the Down button on the desk panel to ensure the desk is retracted to its lower limit (whether it’s the fully retracted hard stop, or a configured lower limit).
STEP 2. Briefly release Down. STEP 3. Press and hold Down for 5 seconds, wait until all desk movement has stopped, then release.
If initialization is successful, you should see a slight up/down “handshake” movement of the desk legs.
If you have a desk panel with a display, you should also see E01 during this part of the procedure.
P2 – Check all cable connections
STEP 1. Mains cable, connected to both the control box and power outlet.
STEP 2. All motor cables are connected to both the control box and the desk leg.
Assuming a standard control box configuration, these must be connected in channels 1 and 2, or channels 1, 2, and 3 for a 3-leg table. They can’t be connected in channels 1 and 3 or 2 and 3 unless there is a configuration on the control box specifying this arrangement.
STEP 3. Desk panel cable, connected to the control box in either port A1 or A2 (doesn’t matter which).
P3 – Check for obstructions
STEP 1. Check under, above, and on the sides of the desk for any obstructions that could prevent movement in either direction.
The next two procedures (P4 and P5) are for a two-leg desk system. The same concepts can be used for a three-leg system using Channel 3 and so forth.
P4 – Check for faulty component(s) WITH error codes (digital display on Desk Panel, or on app via Bluetooth)
Symptom | Procedure |
The system will move down but not up | 1. Initialize (P1) |
The system is unresponsive (no power to display with any button pressed). If any of these steps activate the digital display, initialize the system (P1). |
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The system is powered, but will not initialize. |
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Channel-specific error (Ex: E41 – Channel 1 overload) – Everything except PIEZO errors (E59-E63) |
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The desk is uneven. |
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P5 – Check for faulty components WITHOUT error codes (no digital display on Desk Panel, no Bluetooth)
Symptom | Procedure |
The system will move down but not up. | Initialize (P1). |
The system will not initialize. OR The system won’t complete the full range of motion. – After each of these steps, attempt to initialize (P1). |
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The desk is uneven. | The desk is uneven (P4). |
What is the Control Box Thinking?
There are many clever procedures, checks, and measurements performed in the control box. Here is a brief description of what the control box is trying to accomplish while it is activating an application:
• Safe activation of the application - Parallel, even movement of all desk legs in the application is critical.
The control box does not directly know the position of each desk leg. Instead, the position of each leg is constantly calculated via Hall pulses from each motor. The legs on a single reference are not allowed to be more than +/- 5 Hall pulses out of sync. For a standard DL, this amounts to +/- 0.55 mm.
Motor cable disconnections are also detected as errors.
- If PIEZO technology is present in the desk leg, the control box monitors for PIEZO “collision” signals from each channel. When a PIEZO signal is sensed, movement is immediately stopped and, if there is room, the system is run in the opposite direction a small distance. - Anytime the control sees an incomplete signal, or more than one signal (multiple keys pressed, multiple desk panels activated at the same time), an error is determined and no movement is allowed at that moment. This is to prevent an action or movement that is not intended by the user.
• Protection from equipment damage - Internal temperature of the control box is monitored.
- Maximum current draw for each motor channel, as well as the system as a whole, is measured. When the current exceeds an allowable limit, an error is presented.
Error codes in Linak actuators and how to fix them
Error code | Description | Potential cause | Fix |
E01 | Position Lost: The desk has an unknown position and needs to be initialized. |
| Initialize the system (P1) |
E02 | General overload up: Overload in upward direction has occurred. |
| Check all cable connections, (P2) initialize the system (P1) Fix components by initializing 1 at a time (only possible with Plug & Play configuration) (P4) |
E03 | General Overload Down: Overload in downward direction has occurred. |
| Check all cable connections, (P2) initialize the system (P1)
Troubleshoot components by initializing 1 at a time (only possible with Plug & Play configuration) (P4) |
E08 | Watchdog: Indicates that software failed to kick watchdog. |
| Unplug mains cable for 15 sec Initialize the system (P1)
Replace Control Box |
E09 | LIN collision: Collisions detected on the LIN bus. |
| Check if another desk panel is connected and being activated
Unplug all but one desk panel and test system |
E10 | Power fail: Power fail happened, or power regulator adjusted below 10%. |
| Check main cable is not caught, and is allowed to travel freely
Use strain-relief loop built into control box
Use a 2nd battery; charge batteries |
E11 | Channel mismatch: Change in number of actuators since initialization. |
| Check Motor cable connections and Integrity (P2) Change Motor cable or Desk Leg Initialize the system (P1) |
E12 | Position error: One channel have position different than others. |
| Move table to fully retracted position Initialize system (P1) |
E13 | Short circuit: Short circuit detected during operation. |
| Check motor cable connections (P2) Isolate and replace Motor Cable (P4) Isolate and replace Desk Leg (P4) |
E15 | Power limit: System has reached its power limitation. |
| Check mains cable is not caught, and is allowed to freely travel. Use strain-relief loop built into control box. |
E16 | Key errors: Illegal keys pressed (handled internally in DP1C). |
| Check desk panel. |
E17 | Safety missing: LIN bus unit does not support safety feature. |
| Try DP with more recent software version (printed on label) |
E18 | Missing Initialization plug: A special service tool is required to change number of channels to the system. |
| Add service tool. |
E23 | Ch1 missing: Channel 1 is detected missing. |
| Check Motor cable connections and Integrity (P2) Change Motor cable or Desk Leg Initialize the system (P1) |
E24 | Ch2 missing: Channel 2 is detected missing. |
| Check Motor cable connections and Integrity (P2) Change Motor cable or Desk Leg Initialize the system (P1) |
E25 | Ch3 missing: Channel 3 is detected missing. |
| Check Motor cable connections and Integrity (P2) Change Motor cable or Desk Leg Initialize the system (P1) |
E26 | Ch4: Channel 4 is detected missing. |
| Check Motor cable connections and Integrity (P2) Change Motor cable or Desk Leg Initialize the system (P1) |
Error codes | Description | Potential cause | Fix |
E29 | Ch1type: Channel 1 is not same type as when initialized. |
| Check Desk Leg type Change Desk Leg Initialize the system (P1) |
E30 | Ch2 type: Channel 2 is not same type as when initialized or not same type as channel 1. |
| Check Desk Leg type Change Desk Leg Initialize the system (P1) |
E31 | Ch3 type: Channel 3 is not same type as when initialized or not same type as channel 1. |
| Check Desk Leg type Change Desk Leg Initialize the system (P1) |
E32 | Ch4 type: Channel 4 is not same type as when initialized or not same type as channel 1. |
| Check Desk Leg type Change Desk Leg Initialize the system (P1) |
E35 | Ch1 pulse fail: Channel 1 had to many pulse errors. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E36 | Ch2 pulse fail: Channel 2 had to many pulse errors. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E37 | Ch3 pulse fail: Channel 3 had to many pulse errors. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E38 | Ch4 pulse fail: Channel 4 had to many pulse errors. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E41 | Ch1 overload up: Overload up occurred on channel 1. |
| Remove obstruction (P3) Remove load Initialize if necessary (P1) |
E42 | Ch2 overload up: Overload up occurred on channel 2. |
| Remove obstruction (P3) Remove load Initialize if necessary (P1) |
E43 | Ch3 overload up: Overload up occurred on channel 3. |
| Remove obstruction (P3) Remove load Initialize if necessary (P1) |
E44 | Ch4 overload up: Overload up occurred on channel 4. |
| Remove obstruction (P3) • Remove load • Initialize if necessary (P1) |
E47 | Ch1 overload down: Overload down occurred channel 1 |
| Remove obstruction (P3) Initialize if necessary (P1) |
E48 | Ch2 overload down: Overload down occurred channel 2 |
| Remove obstruction (P3) Initialize if necessary (P1) |
E49 | Ch3 overload down: Overload down occurred channel 3 |
| Remove obstruction (P3) Initialize if necessary (P1) |
E50 | Ch4 overload down: Overload down occurred channel 4 |
| Remove obstruction (P3) Initialize if necessary (P1) |
E53 | Ch1 anti-col: Anti-collision triggered on channel 1. |
| Remove obstruction (P3) Initialize if necessary (P1) |
E54 | Ch2 anti-col: Anti-collision triggered on channel 2. |
| Remove obstruction (P3) Initialize if necessary (P1) |
E55 | Ch3 anti-col: Anti-collision triggered on channel 3. |
| Remove obstruction (P3) Initialize if necessary (P1) |
E56 | Ch4 anti-col: Anti-collision triggered on channel 4. |
| Remove obstruction (P3) Initialize if necessary (P1) |
E59 | Ch1 SLS/PIEZO: Safety limit switch activated on channel 1. |
| Remove obstruction (P3) Initialize if necessary (P1) |
E60 | Ch2 SLS/PIEZO: Safety limit switch activated on channel 2. |
| Remove obstruction (P3) Initialize if necessary (P1) |
E61 | Ch3 SLS/PIEZO: Safety limit switch activated on channel 3. |
| Remove obstruction (P3) Initialize if necessary (P1) |
E62 | Ch4 SLS/PIEZO: Safety limit switch activated on channel 4. |
| Remove obstruction (P3) Initialize if necessary (P1) |
Error code | Description | Potential cause | Fix |
E65 | Ch1 pulse dir: Pulses counted wrong direction in channel 1. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E66 | Ch2 pulse dir: Pulses counted wrong direction in channel 2. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E67 | Ch3 pulse dir: Pulses counted wrong direction in channel 3. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E68 | Ch4 pulse dir: Pulses counted wrong direction in channel 4. |
| Check motor cable connections and integrity (P2) Change Desk Leg Initialize the system (P1) |
E71 | Ch1A short: Short circuit on channel 1 [If T-splitter is used, short circuit on 1A]. |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E72 | Ch1B short: Short circuit on channel 1 [If T-splitter is used, short circuit on 1B]. |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E73 | Ch2A short: Short circuit on channel 2 [If T-splitter is used, short circuit on 2A] |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E74 | Ch2B short: Short circuit on channel 2 [If T-splitter is used, short on 2B]. |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E75 | Ch3A short: Short circuit on channel 3 [If T-splitter is used, short circuit on 3A] |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E76 | Ch3B short: Short circuit on channel 3 [If T-splitter is used, short circuit on 3B] |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E77 | Ch4A short: Short circuit on channel 4 [If T-splitter is used, short circuit on 4A] |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E78 | Ch4B short: Short circuit on channel 4 [If T-splitter is used, short circuit on 4B] |
| Inspect motor cable for damage, replace if damaged
Inspect cable exiting leg (if applicable), replace if damaged. |
E86 | Master: Connection to master lost OR following messages are from master. | [Only used in multi-parallel system]
| Check connection to master box, check cable integrity
If communicating other error codes, see above |
E87 | Slave 1: Connection to 1st slave lost OR following messages are from 1st slave. | [Only used in multi-parallel system]
| Check connection to master box, check cable integrity
If communicating other error codes, see above |
E88 | Slave 2: Connection to 2nd slave lost OR following messages are from 2nd slave. | [Only used in multi-parallel system]
| Check connection to master box, check cable integrity
If communicating other error codes, see above |
E89 | Slave 3: Connection to 3rd slave lost OR following messages are from 3rd slave. |
| Inspect motor cable for damage, replace if damaged Inspect cable exiting leg (if applicable), replace if damaged. |
E93 | DeskSensor 1 – Activation: Detected trigger from LIN bus safety limit switch, e.g. DS1. |
| Remove obstruction. |
E94 | DeskSensor 1 – No longer detected: LIN SLS unit (e.g. DS1) no longer detected. |
| Ensure DS1 unit and all cables are correctly mounted. |
How to initialize your height-adjustable control console
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