Hach QbD1200 AutoSampler, User Manual, Page: 16 / 122

Troubleshooting
Problem Possible cause Solution
The instrument does not
operate. The LED status
indicators are off. The power switch is off. Set the power switch to on.
The power cord is disconnected
from the power supply or wall
outlet. Connect the power cord.
The power cord is damaged. Replace the power cord.
The power supply is faulty. Contact technical support.
The electrical transients on the
power line are too large, which
may disrupt the USB
communication between the
analyzer and the sampler. Install any commercially available USB
opto-isolator between the analyzer and the
auto sampler. To repair USB
communications, set the power for both
instruments to off, then to on.
The instrument does not
operate. The LED status
indicators are on. The home position of the arm
has damage. Contact technical support.
The sample probe is not moving
freely. Remove the probe to clean and remove
debris. Refer to
Replace the sample probe
on page 15.
Replace the sample probe. Refer to
Replace the sample probe on page 15.
The mechanical Z-drive has
damage. Contact technical support.
The mechanical Z-drive is not
installed correctly. Validate the installation. Refer to Install the
mechanical Z-drive on page 9.
The arm does not operate
correctly. The instrument was physically
damaged. Set the instrument power to off, then to on.
If the problem continues, contact technical
support.
The sample probe does not pull
up the sample. The air flow into vial does not
correctly flow. The sample
tubing is loose. Examine the sample probe. Make sure that
the needle is inside the metal sleeve.
Tighten the sample tubing connection.
The sample probe does not go
through the septum cap of the
vial. The stripper plate is not aligned
correctly. Adjust the height between the vials in the
sample tray and the platform of the stripper
plate. Refer to
Prepare the instrument for
sampling on page 13.
The probe does not easily go
into the mechanical Z-drive.
The sample bottle is lifted up
after the probe retracts.
Replacement parts and accessories
W A R N I N G
Personal injury hazard. Use of non-approved parts may cause personal injury, damage to the
instrument or equipment malfunction. The replacement parts in this section are approved by the
manufacturer.
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to
the company website for contact information.
16 English