Troubleshooting - Hach FT660 sc Basic User Manual

How to clean spills
C A U T I O N
Chemical exposure hazard. Dispose of chemicals and wastes in
accordance with local, regional and national regulations.
1. Obey all facility safety protocols for spill control.
2. Discard the waste according to applicable regulations.

Troubleshooting

Problem Possible cause
Low (< 1) or Head assembly is not
negative readings correctly installed on the
body of the instrument
Laser failure
PMT/Electronics failure
Errors
When an error occurs:
• The reading on the measurement screen flashes.
• All outputs are held.
• The red status light on the instrument turns on.
To access the current instrument errors, select Diagnostics, [Select
Sensor], Error List.
20 English
Select an error and confirm to identify the cause of the error. Refer to
Table
Error
A/D FAILURE
LASER FAILURE
FLASH FAILURE
LOW SIGNAL
Resolution
ERROR
Correctly install the head
assembly on the body of
the instrument. If not, the
red status light will flash.
Warnings
Contact Technical Support.
When a warning occurs:
• A warning icon flashes and a message is shown on the bottom of the
• The red status light on the instrument starts flashing.
Warnings do not affect the operation of menus, relays and outputs.
To access the current instrument warnings, select Diagnostics, [Select
Sensor], Warning List.
Select a warning and confirm to identify the cause of the warning. Refer
to
2.
Table 2 Error list
Possible cause
A/D conversion failure
Laser did not work correctly
and is turned off
Data log and event log not
working
Signal is too low (less than
3.0 mNTU)
measurement screen.
Table 3.
Resolution
Contact Technical Support.
Make sure that the head
assembly is installed
correctly. If not, the red status
light will flash.
Contact Technical Support.