Hach LANGE WDMP sc Manual Del Usuario página 17

CL17 troubleshooting
Table 5 shows causes and corrective actions for several common
problems. Refer to the user manual for individual errors and warnings.
Table 5 CL17 troubleshooting
Problem Possible cause
The display does not come No power
on and the pump motor will
not operate.
The display does not come Problem with the
on but the pump motor will power supply
operate.
The display comes on but the Low operation
pump motor will not operate. power
Incorrect voltage
selector setting
Disconnected motor
cable
Defective motor
The display shows a zero No stir bar
measurement.
Loose pressure
plate screws
No sample flow
More than one stir
bar
Problem
Sample is overflowing from
the instrument.
Solution
Unwanted moisture has
condensed on the
Set the power switch to
colorimeter.
on.
Change spent fuses.
The measurement is lower
Connect the power cord.
than expected.
Install a new main circuit
1720E troubleshooting
board.
Table 6
Make sure that the line
problems. Refer to the user manual for specific instructions.
voltage is within
specification.
Set the line voltage
Message
selector switch to the
correct voltage. Bad lamp
Connect the motor cable
connection.
Replace the motor.
Put the stir bar in the
colorimeter.
Tighten the thumb
screws.
Examine the sample
condition line and other
supply line. If necessary,
remove blockages in the
line.
Use a flashlight to look
inside the colorimeter.
Remove all extra stir bars.
Table 5 CL17 troubleshooting (continued)
Possible cause
Clogged or air-
locked drain
Large temperature
difference between
sample and
instrument
Clogged tubes
shows causes and corrective actions for several common
Table 6 1720E troubleshooting
Description
The lamp is burned out.
The lamp is unplugged or
disconnected.
The power supply is
disconnected.
The circuit board is faulty.
Solution
Clean the drain line.
Release the air lock from
the plumbing.
The sample temperature
must be at room
temperature before it
goes into the instrument.
Replace the tubes.
Solution
Replace the lamp.
Plug in the lamp or install the
lamp again.
Plug in the power supply.
Contact technical support.
English 17