3
E. If the error code now reads E13, indicating a fault on channel 2, then the fault moved with
the Lifting Column. Therefore, the problem must reside with the Lifting Column 1, which was
moved from channel 1 to 2.
F.
If the error code instead continues to read E12, then both Lifting Columns may be faulty.
G. For further verifi cation, repeat this process by swapping out the suspect Desk’s Lifting
Columns with the Lifting Columns from your troubleshooting parts kit, to zero in on which
Lifting Column is faulty, if not both. (If the suspect Desk’s Lifting Columns function normally
in the bench-test setup, move on to Step 5.)
Any faulty Lifting Columns must be replaced.
There are no fi eld-serviceable parts inside the Lifting Column.
Between each of the following steps, be sure to disconnect the Control Box from the power source
for at least 5 seconds to power down the internal processor.
Step 5:
If there are no error codes to indicate faults with the Lifting Columns or their Low-Voltage Cables
or connectors, progressively swap out parts in the bench-test setup as follows:
A. Swap the known-good Power Cable with the original from the non-functioning Desk.
If it stops working, the Power Cable is faulty.
B. Using the original Power Cable, swap the known good Controller with the original from
the non-functioning Desk. If it stops working, the Controller is faulty.
C. Using the original Power Cable and Controller, swap the known good Control Box with
the original from the non-functioning Desk. If it stops working, the Control Box is faulty.
connector:
Be sure to go through all of the steps above to fully identify all faulty components.
There could be more than one!
COMMON PROCEDURES
POWER-SAVING CONTROL BOX:
·
The Control Box automatically powers down into ‘Standby’ mode after 20 seconds of inactivity.
·
During ‘Standby’ mode, the Control Box only consumes 0.3W watt of power.
·
With the Control Box in ‘Standby’ mode, the Desk can lose power without affecting the synchronization
of the Lifting Columns. However, a power loss still allows the Control Box to power down and ‘Soft Reset.’
(see
below)
DUTY CYCLE:
·
In order to prevent excessive heat buildup and avoid damage to the system, the Control Box limits the
Up-Down function of the Desk to a maximum of 1 minute of continuous operation in a 10-minute timeframe
(10% duty cycle).
·
If the 10% duty cycle is exceeded, the Control Box may still allow limited movement, for example 3 seconds
of movement after 10 seconds of rest. If further movement is desired, allow the Desk to cool off before
making further adjustments.
·
If the Desk does not function at all after long periods of operation, allow the Desk to cool off, until the
Control Box has been idle for the entire duty cycle period.
·
If the Control Box overheats, the display of the Digital / Preset Controller will read ‘HOT.’ Simply wait until
the Control Box cools off, and ‘HOT’ is no longer displayed, before attempting further adjustments.
