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8.11 Replace the fuse
Electrocution hazard. Remove power from the instrument before doing maintenance or
service activities.
Fire hazard. Use the same type and current rating to replace fuses.
Remove the two fuses (F1 and F2) and replace them with two new fuses with the same
specifications, T, 1.25 A, 250 V. The same fuse rating is used for the 115 V and for the 230 V
operation. Refer to
Figure 10
Section 9 Troubleshooting
Problem
The SOFT LED light is not on
and the pump motor does not
operate.
The SOFT LED light is not on
and the pump motor does
operate.
The SOFT LED light is on but
the pump motor does not
operate.
The reading is continually high.
The HARD LED is on.
D A N G E R
D A N G E R
on page 14.
Possible cause
No power
Problem with the power
supply
Operation power is low
Voltage selector setting is
not correct
Motor cable is not
connected
Motor does not operate
• No stir bar
• LED is not connected
• No sample flow
• Out of reagents
Solution
• Make sure that the power switch is
set to on.
• Connect the power cord.
• Replace the fuses if necessary.
Replace the main circuit board.
Contact technical support.
Make sure that the line voltage is
within specification.
Set the line voltage selector switch to
the correct voltage.
Connect the motor cable connection.
Replace the motor.
Refer to
Troubleshooting for a hard
reading
on page 22. If the problem
continues, cycle power to the
instrument, examine all power
connections and fuses, replace the
circuit board or contact technical
support.
English 21
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Table of Contents
Troubleshooting
