Blue I HydroGuard HG-302 Manual De Uso página 133

Problem / Symptoms
Zero or Low Reading then
Normal
Chlorine Measurement
Inconsistent
Cl Display Showing '---'
Sample Cell or Colorimeter
is Overflowing
Colorimeter Needles
Scaling
No power
Potential Cause
Bad Pump tube and solution is
bypassing/returning to reagent bottle
Piston sticks once in a while. Note: Ver4.0
will present "Stack Piston" Alarm.
Valve malfunctioning.
Needle is cracked or tube split at needle
Cl averaging on
Calibrated at wrong level
Valve malfunctioning.
Needs Calibration (near set point)
LED/colorimeter bad
No flow
Colorimeter disconnected
Too much water to the Inlet
Outlet blocked or not downward sloping
Water is flowing too high in colorimeter
check the fuse
Table 9: Additional Troubleshooting
Check by raising soln above pump
and/or turning off for an hour and
then seeing if reagent comes out
immediately when pumped
View for a while and see if stacks.
Check/Clean valve and spring. Add
grease. Replace Valve if necessary.
Needle will be black on outside --
DPD occasional does not drop
properly b/c not flowing through
Check if Cl averaging on in Tech
menu -- turn off it not wanted
Enter calibration -- enter password
and press enter to accept reading
Check/Clean valve and spring. Add
grease. Replace Valve if necessary.
If +/- 25% of set point, re-calibrate
LED likely not selective or not
reading proper zero of 650. Check
with Tech Module and replace
Reestablish proper flow to
colorimeter and wait for next test
check to see if ORP Emergency
mode is indicated. Determine
problem with colorimeter: check
connections, clean cell, etc.
Reduce Inlet flow and/or pressure - a
regulator may be required
Redirect Outlet so constant
downward slope and no sharp bends
Reduce flow/pressure of water to
colorimeter, replace the needles.
47
Solution / Suggestion
needle
from colorimeter
cycle
in the tube
replace if needed