Roche Diagnostics
Operator’s Manual · Version 3.0 195
Multiplate® analyzer 8 Troubleshooting
Dealing with exceptional situations
Situations associated with quality controls
Situation Description Cause Remedy
The result of the liquid quality
control (LQC) is outside the
specified range.
The result of the LQC is above
the specified range.
1. Insufficient preheating of
the solutions (< 20 min)?
2. Wrong incubation time?
(applicable for manual
pipetting only)
3. Solution 2 added into
solution 1, not as
recommended onto the
surface of solution 1?
4. Air bubbles at the sensor
unit of the test cell?
5. Wrong calibration.
For 1.-4.: Verify the LQC test
procedure (refer to the package
insert) and repeat the
measurement correctly.
If the result of the LQC remains
above the specified range,
contact your Roche Service
representative.
For 5.: Contact your Roche
Service representative.
The result of the LQC is below
the specified range.
1. Added volume of solution 2
was too little?
2. Wrong calibration.
For 1.: Verify the LQC test
procedure (refer to package
insert).
For 2.: Contact your Roche
Service representative.
The electronic control
measurement is outside the
ranges.
One or more channels are
outside the ranges.
1. Sensor cable not properly
connected?
2. Temperature outside
reference range
(37.0±1.0 °C) / preheating
phase of the analyzer less
than 20 minutes?
3. Room temperature outside
the specified environmental
conditions?
4. That specific sensor cable
does not work.
5. Maybe the channel is
defective.
For 1.: Plug the sensor cable
into the parking position
properly.
For 2: Wait until the
temperature is within the
specified range, the software
must have been running for at
least 20 minutes.
For 3.: Make sure that the room
temperature is within the
allowed limits (see
Environmental conditions
(p. 62)).
For 4.: Replace the individual
sensor cable and repeat the
electronic control. If the
problem persists, contact your
Roche Service representative.
For 5.: Lock the defective
channel and contact your
Roche Service representative.
Table 8-6 Quality control errors
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