Troubleshooting
Troubleshooting Guide
Thermo Scientific
146iQ Instruction Manual
6-3
Problem
Possible Cause
Action
duty cycle temperature
at 100%
Flow, pressure or vacuum
are too low, or: pump
produces no flow
Diaphragm or valve
plates are worn or dirt
in the head
Rebuild or replace pump.
Connections or lines are
blocked
Let the pump run for a few minutes
pumping air.
An external valve is
closed or a filter
blocked
Install the pump at the highest
point in the system.
There is a leak at a
connector, in a line or in
the pump head
Find and repair leak.
Liquid (condensate) has
collected in the pump
head
Clean and dry. Pump may need
replacement.
Pump cable not seated
Verify the pump cable is properly
seated into the Step POL board.
The cross-section of
pneumatic lines, or
connected components
are too small or they
are restricted
The pump is not designed for this
condition.
Alarm – board
communication failure
Internal cables not
connected properly
Verify cables to DMC PCB are
seated properly. Replace DMC PCB
if necessary.
Alarm – power supply
Internal cables not
connected properly
Verify cables to DMC PCB are
seated properly. Replace DMC PCB
if necessary.
Cell frequency (Photometer)
Light adjustment
Readjust Lamp setting
Defective detector
Interchange detectors at
Photometer DMC PCB connectors
to determine if detector is
defective.
Ozone frequency
Lamp supply
Low or Zero frequency
Light adjustment
Re-adjust lamp setting
Dirty cell
Clean cell.
Excessive noise
Foreign material in cell
Clean cell.
Defective lamp
Replace lamp as needed.
Defective detector
Interchange detectors at
photometer DMC PCB connectors
to determine if detector is
defective.
Summary of Contents for 146iQ
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