BENDIX AD-9 Dados de serviço - Página 17
Procurar online ou descarregar pdf Dados de serviço para Desumidificador BENDIX AD-9. BENDIX AD-9 20 páginas.
Imprimir página
AD-9 AIR DRYER TROUBLESHOOTING CHART (Continued)
SYMPTOMS
4. Constant exhaust of air
at air dryer purge valve
exhaust or unable to
build system pressure.
(Charge mode.)
5. Air dryer does not purge
or exhaust air.
6. Desiccant material
being expelled from air
dryer purge valve
exhaust (may look like
whitish liquid or paste
or small beads.)
- OR -
Unsatisfactory
desiccant life.
CAUSE
A. Air dryer purge valve
leaking excessively.
B. Defective governor.
C. Purge control line
connected to reservoir or
exhaust port of governor.
D. Purge valve frozen open -
faulty heater and
thermostat, wiring, blown
fuse.
E. Inlet and outlet air
connections reversed.
F. Kinked or blocked
(plugged) discharge line.
G. Excessive bends in
discharge line (water
collects and freezes).
H. Excessive system
leakage.
I. Purge valve stays open -
supply air leaks to
control side.
A. Broken, kinked, frozen,
plugged or disconnected
purge control line.
B. See Causes B, E, G for
Symptom #4.
A. This symptom is almost
always accompanied by
one or more of
Symptoms 1, 2, 3, 4 and
5. See related causes
for these Symptoms
above.
B. Air dryer not securely
mounted. (Excessive
vibration.)
C. Defective cloth covered
perforated plate in air
dryer.
REMEDY
A. With compressor loaded, apply soap solution
on purge valve exhaust, to test for excessive
leakage. Repair purge valve as necessary.
B. Check governor for proper cut-in, cut-out
pressure and excessive leakage in both
positions. Repair or replace as necessary.
C. Purge control line must be connected to
unloader port of governor.
D. Test heater and thermostat as described in
Step 7 of Preventative Maintenance Section.
E. Compressor discharge to inlet port. Reconnect
lines properly.
F. Check to determine if air passes through
discharge line. Check for kinks, bends,
excessive carbon deposits.
G. Discharge line should be constantly sloping
from compressor to air dryer with as few bends
as possible.
H. See Symptom #1s Causes and Remedies.
I. Replace purge valve housing assembly o-rings.
A. Test to determine air flows through purge
control line when compressor unloaded. Check
for undrilled fittings. (See Symptom #4,
Remedy C.)
B. Refer to Remedies B, E, G for Symptom #4.
A. See Causes and Remedies for Symptoms 1, 2,
3, 4 and 5.
B. Vibration should be held to minimum. Add
bracket supports or change air dryer mounting
location if necessary.
C. Replace desiccant cartridge assembly.
17