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Troubleshooting
Troubleshooting Guide
6-4
49iQ Instruction Manual
Problem
Possible Cause
Lamp
Lamp heater
+/- 15V power supply
Cell A or B noise
Foreign material in one cell
excessive
Defective detector
Cell A and B noise
Foreign material in cells
excessive
Lamp failure
+/- 15V power supply
Output signal noisy
Recorder
Sample is varying
Foreign material in cell
Sticky solenoid valve
Analyzer does not
Leak
calibrate properly
Contaminated scrubber
Flow/Pressure out of
calibration
Dirty system
Solenoid defective
Slow response
Averaging time
Contaminated photometer
Alarm – O
Lamp
Defective lamp heater
3
temp
Alarm –Lamp temp
Defective lamp heater
Alarm – Flow
Flow low
Action
Remove one cell and look for blue
light in hole of input block.
Check lamp temperature from the
Status & Alarms>Photometer Bench
screen.
Check +/- 15V from the Status &
Alarms>Photometer Bench screen.
Clean cell.
Interchange detectors at photometer
DMC PCB connectors to determine if
detector is defective.
Clean cells.
Check +/- 15V from the Status &
Alarms>Photometer Bench screen.
Replace or repair recorder.
Run instrument on stable ozone
source. If quite, no malfunction.
Clean cell.
Replace with known-good solenoid
valve.
Check all tubing connections for leak.
Perform scrubber efficiency test.
Replace if needed.
Recalibrate flow/pressure in the
operator's manual.
Clean cells and flow components.
Replace with known-good solenoid
valve.
Verify averaging time is set properly.
Clean bench and then condition
system overnight.
Replace ozonator, lamp driver board
or lamp assembly.
Replace bench lamp driver board or
lamp assembly.
Check sample capillary for blockage.
Replace as necessary.
Thermo Scientific
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