Gardner Denver RDS Series, Operation And Maintenance

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Problem Possible Cause Solution
Section 7
Troubleshooting Guide
RDS Series — 50-1000 SCFM
Water downstream of the dryer Bypass valve is open
Drains in front of the dryer malfunctioning
Ambient air is lower than the dewpoint of the
compressed air.
Drain solenoid coil burned out
Open connection from the drain to the
control board
Drain valve is plugged
Airflow through the dryer is too high
Close bypass
Check drain for proper coil operation and
restrictions in valve. See drain cleaning
instructions.
Insulate or reroute air lines in problem areas.
Ohm coil and verify proper operation.
Replace if necessary.
Verify proper connections at the coil and the
control board
See drain cleaning instructions
See previous air flow instructions
Large pressure drop across the dryer Inlet or outlet valves are closed
Dirty or plugged filters in air system
Frozen heat exchanger
Plugged heat exchanger
Airflow through the dryer is too high
Open valves and verify proper positions.
Check filters, Change if necessary
Adjust airflow to appropriate levels.
Adjust hot gas valve. See HGV
adjustment instructions.
Verify that exchanger is plugged. Clean
as necessary
See previous air flow instructions
Alarm lamp is on and dryer is not
running Condenser high temperature safety is tripped
Compressor high temperature safety is
tripped
Clear conditions that caused alarm.
Remove and restore power to dryer
to reset.
Clear conditions that caused alarm.
Remove and restore power to dryer
to reset.
Alarm lamp and run lamp off and dryer
will not run Disconnect switch or breaker is off
Voltage is out of range
Control fuse is blown
Restore power
Verify proper voltage
Verify and correct cause of problem.
Replace fuse.