Gardner Denver PUREAIR EWD99E, Operating And Service Manual

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13-11-608 Page 60
SYMPTOM POSSIBLE CAUSE REMEDY
Compressor is low on delivery
and pressure 1. Restricted air filter. 1. Clean or replace filter.
2. Sticking inlet valve. 2. Inspect and clean inlet
valve.
3. Unload pressure adjusted too
low.
3. Adjust the unload pressure.
See Section 4.
4. Discharge check valve
stuck closed.
4. Disassemble and clean
valve.
5. Subtractive valve is active. 5. Adjust subtractive valve to
start operating at 1 psi
above the desired full load
operating pressure. Clean
or replace if output is not
linear - 2.3 psi output per 1
psi input.
High discharge air temperature 1. Dirty or clogged cooler face. 1. Clean cooler.
2. Insufficient cooling air flow. 2. Provide unrestricted supply
of cooling air.
3. Clogged water injection filter
or cooler (interior).
3. Replace filter or clean
cooler.
4. Insufficient water cooling
flow.
4. Cooling water must meet
minimum flow, pressure and
temperature requirements.
5. Reservoir water level low. 5. See “Reservoir water level
low”, Troubleshooting
details
Reservoir water level low 1. Drain valve leaking. 1. Inspect and clean or
replace.
2. RO producing none to low
water.
2. See RO Troubleshooting
details.
3. Condensate return strainer
and/or orifice plugged.
3. Inspect and clean.
Abnormal water volume found
in package discharge air 1. Condensate return strainer
and/or orifice plugged. 1. Inspect and clean.
NOTICE
Gardner Denver factory remanufactured replacement compressor airend units
are available from your authorized distributor, on an exchange basis, for all
rotary screw compressor units.