Hach DOC026.52.00769 User Manual page 50

Troubleshooting
Warning
Displayed Warning
Number
12
INT FLASH FAIL
13 ENGLISH ONLY
14
15 SERVICE WARN
Sensor Error
or Warning
LAMP FAIL
Low Readings
VIN FAIL
ADC FAIL
DARK WARNING
48
Table 6 Warning Codes (continued)
Definition/Resolution
Internal copy of the application code has failed. Self-recovery should occur.
English only device driver file. Update the device driver with the latest version.
VREF WARN ADC voltage reference is out of specification.
SS7 sc is currently in service mode
Table 7 General Troubleshooting
Possible Cause
Lamp burned out
Lamp unplugged
+12 V connection loose at controller
Dislodged lamp
Bad circuit board in turbidimeter head
Detector coated/dirty
Lens coated/dirty
Obstructed light path
See LAMP FAIL causes above
Loose connection at sc100
SS7 sc to sc100 cable too long
Fluctuation in voltage
Bad detector assembly
Fluctuation in voltage
Bad detector assembly
Light Leak—SS7 sc enclosure door is
open during Power Up or Zero
Electronics
Bad detector Assembly
Table 7 presents sensor warnings displayed in the Event Log,
possible causes and corrective actions.
Corrective Action
Replace the lamp. See
Restore connection
Restore connection
Reinstall lamp
Contact the Technical Support Department.
See section 6.3.1 on page
Contact the Technical Support Department.
Clean the lens using isopropyl alcohol and a cotton swab.
Remove obstruction
See LAMP FAIL corrective actions above
Tighten connection of cable at sc100
Make sure that if an extension cable is used, only one is
present and is no longer than 7 meters (approximately
30 feet).
Turn instrument power off and back on.
Replace detector assembly (Cat. No. 71221-00).
Turn instrument power off and back on.
Replace detector assembly (Cat. No. 71221-00).
Make sure the door is closed, then perform ZERO
ELECTRONICS in the CALIBRATION MENU.
Replace detector assembly (Cat. No. 71221-00).
section 6.4.1 on page 40.
40.