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Troubleshooting
The following table should give an overview of possible errors and an instruction to check and to repair them (is not valid
for the starting-up period of cooler).
Error
No sample gas flow
Water carry over
High oxygen readings/low
pollutant readings
'Dry' light is not Illuminated
'Cool' light is not illuminated
MAN.SCPSCU.REVD.03022015
Possible reason
Heat exchanger plugged
Alarm pump shutoff
No power on cooler
Inadequate drain apparatus
Excessive flow rate
High ambient temperature
Defective cooler fan or blower
Leak
Water carry over
Faulty water carry over device or
circuit board
Ambient temperature too high
Flow rate/water content too high
Failed peltier element
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Check/Repair
Check for an obstruction
Remove heat exchanger from unit and
disassemble
Verify cool & dry indicators are illuminated
Ensure cooler has power supplied
Verify drain tubing is unobstructed and
equipment is functioning satisfactory
Reduce the flow rate
Reduce the ambient temperature (Increase
ventilation or relocate cooler)
Verify air flow across the heat sink
Hold hand in front of heat sink fins and
ensure air movement
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 illumi-
nate, 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
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