General Troubleshooting Procedure - Hach APA 6000 Manual Del Usuario

Table 3 Sensor alarms (continued)
Message Description
VALVE NO HOME The valve was not able
to find its home signal.
VLV HOME SIG ON The home signal of the
valve is always on.
VLV MOVE ERR The valve was not able
to move to the necessary
port.
BURETTE1 HOME The home location for
ERR Burette 1 went outside of
its limit from the last
Home check.
BURETTE1 HOME The cumulative offset
DRIFT drift from Home is higher
than the acceptable
limits.
BURETTE1 NO HOME Burette1 was not able to
find its home location.
BURETTE1 HOME ON The home signal for
Burette1 is always on.
SAMPLE1 (or There is no sample flow
SAMPLE2) OUT to the analyzer.
Solution
Replace the valve module if
the problem continues.
Replace the valve module.
Replace the valve module if
the problem continues.

General troubleshooting procedure

Do the steps that follow to identify the cause of operational problems.
1. Make sure that none of the analyzer bottles are empty. If an reagent
Identify if the tubing has a
blockage or if there is
plumbing that is not correct.
Replace the pump
(autoburette) module if the
2. Make sure that 12.7 mm (0.5-in.) of the tubing comes out of the
problem continues.
3. Make sure that the tubing going into the analyzer bottles is the
Identify if the sample
4. Make sure that the tubes connected to the rotary valve are filled with
conditioning unit has a
blockage. Make sure that
there is sample flow to the
analyzer.
5. If the tubing to the rotary valve has been recently been disconnected,
Table 4 Set point alarms
Message
LOW ALARM value units The sample measurement is less than the set point
value selected by the user.
HIGH ALARM value units The sample measurement is more than the set point
value selected by the user.
RATE ALARM value The sample measurement rate change is more than
units the set point value selected by the user.
or standard solution bottle is empty, replace all the reagent and
standard solution bottles. Make sure that the cleaning solution bottle
is full. Refer to Replace the reagents and standards
bottom of each straw that goes in the analyzer bottles.
correct tubing. Each tube has a label that identifies the
corresponding bottle.
fluid and not air. If there is air in the tubes:
a. Examine the tubing for kinks and/or crushed areas that prevent
flow through the tubing. Replace tubing with damage. Refer to
Replace a tube on page 14.
b. Make sure that flow is not prevented by fittings that are over-
tightened. Cut off the pinched end of the tube and use a new
ferrule. Refer to Figure 7
c. Examine the tubing connections and the seal on the bottle caps
for leaks. Fix any leaks.
make sure that the tubing is correctly connected to the rotary valve.
Description
on page 5.
on page 15 and Figure 8 on page 15.
English 19