Troubleshooting Guide - Gardner Denver RDS Series Operation And Maintenance

RDS Series — 50-1000 SCFM

Troubleshooting Guide

Problem
Dewpoint lamp does not light
Run lamp does not turn on
Alarm lamp is on
Yellow alarm light is on
dewpoint display
Possible Cause
Power switch is not on
Supply voltage is incorrect
Bad connection from dewpoint therrmistor
to control board
Dewpoint lamp is burned out
Lamp is non functional
Air pressure is low and air pressure switch is
not made
Air pressure switch is non-functional
No supply voltage
Condenser high temperature switch is open
Compressor high temperature
switch is open
Ambient air temperature is too high
Inlet temperature to the dryer is too high
Dryer is not running
No air flow through dryer or bypass is open
Inlet air temperature is too high
Air flow through dryer is too high
Dewpoint thermistor is not in
the well
Open connection from dewpoint probe to
control board
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Solution
Depress switch on front of dryer control
panel
Verify proper voltage at inlet to dryer
Refer to wiring diagram and check proper
connections
Verify proper lamp function
Check lamp
Verify proper pressure at inlet of dryer –
check bypass
Check pressure switch connections at switch
and control board
Verify proper voltage
Check ambient temperature, fan motor,
condenser filter, for problems.
Check fan and high condenser temp
thermistor for proper location.
Verify liquid injection valve connections at
valve and control board.
Verify proper inlet air and ambient
conditions. Refer to specification table for
proper parameters.
See specification table for proper
parameters. Provide ventilation or means of
controlling ambient to ensure proper
conditions.
Verify proper aftercooler operation. See
specification table for proper temperature
limits.
Depress on button on control panel and
verify proper operation
Close the bypass.
Open all valves.
Check for restrictions in airflow.
See previous high inlet information
See specification table for proper airflow
parameters. Adjust airflow to proper levels.
Place thermistor securely in the well
Verify proper connections at probe and
control board.
Section 7