M&C TEC1 Series, Operation Manual

Page: 19 / 78

19
TROUBLESHOOTING
The following table aims to point out possible operational problems and offer solutions to such problems (not
applicable during the startup procedure).
Problem/Indication Possible cause Action/Check
Not turning on
No mains supply
Check for mains supply voltage at terminals
against nameplate. Neither the display nor the
heat sink fan will be operational.
Power supply failed
Check for mains supply voltage at power supply,
then verify 24VDC output direct from p/s. If no
24VDC, replace power supply. Heat sink fan
should be operational.
Condensate sensor
alarm
Overloading of the
refrigeration capacity of the
cooler due to too much
water vapor or too great a
sample flow rate
Reduce flow rate
Verify moisture content of sample and compare
to operating specifications
Air leak in the condensate
removal tubing Replace tubing, verify all connections are leak
free
Failure of the sample cooler
Verify chiller is at setpoint temperature The cooler is not cold
enough
Inadequate drain apparatus
of a fault in the condensate
removal equipment.
Verify drain tubing is unobstructed and
equipment is functioning satisfactory
Excessive flow rate Reduce flow rate
High ambient temperature Reduce the ambient temperature
Defective cooling fan Verify air flow over fins, clean fins or service fan
No sample gas flow
Heat exchanger plugged Check for an obstruction
Alarm shutoff
Verify no alarms are displayed, address as
required
High O2 / low
pollutant readings
Leak
Loose connection, verify all fittings are leak free
on the vacuum side of the system
Defective peristaltic pump
tubing
Replace tubing
Broken or leaking heat
exchanger
Remove heat exchanger and replace if broken
Does not maintain
setpoint
temperature
Ambient temperature too
high
Reduce the ambient temperature
Flow rate/water content too
high
Lower the flow rate thru the cooler and observe
the results. If condition corrects itself, consult
the factory for further troubleshooting
Failed Peltier element
Measure the resistance between the red and
black Peltier leads. A failed Peltier element will
read high resistance or "open"