Arrow Pneumatics RH203, Instruction & Maintenance Manual

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6. TROUBLESHOOTING GUIDE
PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
Elevated
Dewpoint Insufficient purge rate 1. Check purge flow settings.
2. Check purge piping for obstruction.
3. Clean purge piping and muffler.
Inlet air/gas pressure below
design condition 1. Check pressure source.
Flow rate higher than design
condition 1. Check flow rate and caused for
increased Demand.
Inlet temperature above design
condition.
1. Check aftercooler, clean and
service as necessary
Entrained water entering
desiccant bed. 1. Check air/moisture separator and
prefilter.
2. Replace dryer desiccant if
necessary.
Desiccant contaminated by oil 1. Install suitable prefilter
2. Replace dryer desiccant.
Excessive
pressure drop
in dryer. Excessive flow rate. 1. Check flow rate.
2. Locate cause for increased air
demand.
Inlet pressure below design
condition. 1. Check pressure source.
Failure to shift
towers from
drying to
regenerating
service. Not input power. 1. Check input voltage
Defective solenoid valve. 1. Check input voltage to solenoid
valve.
2. Check outlet air flow from solenoid
valve.
1. Check input and output voltages. Defective timer
No pilot air 1. Check pilot air-line for blockage
2. Check to see if pilot air-line filter is
clean. Replace element if needed.
Defective inlet valves 1. Check for pilot air to operate valve.
Refer to steps above if no pilot air is
detected.