Universal Analyzers 500 series User Manual page 21

Troubleshooting
High oxygen readings/ low
pollutant readings
'Dry' light is not Illuminated
'Cool' light is not illuminated
Power only on drain pump
Leak
Water carry over
Faulty water carry over IC
Ambient temperature too high
Flow rate/ water content too high
Failed Peltier element
Blown fuse (F1)
Defective transformer (T1)
Page 21 of 44
Loose connection
Verify all fittings are leak free
Defective peristaltic pump tubing
Replace tubing
Broken or leaking heat exchanger
Remove heat exchanger and replace if broken
or repair (replace O-Ring) if leaking
See "water carry over' error
Disconnect/Unplug the 2 wire cable from the
WCO terminals, located on the power supply
board. If the dry light does not illuminate,
consult the factory
Reduce the ambient temperature (Increase
ventilation or relocate cooler)
Lower the flow rate through the cooler and
observe the results
If condition corrects itself, consult the factory
for further troubleshooting
Measure resistance between the red & black
Peltier leads. A failed Peltier element will
read high resistance or 'open'. Consult wiring
diagram for wire location details
Replace fuse
Replace power supply board
MAN.500.REVD.06302015