Altec AIR MHR Series, Manual

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14
PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
Dryer Fails to Pres-
surize
Faulty purge valve 1. Check purge valve and its solenoid valve.
2. Refer to earlier steps if no pilot air is detect-
ed
3. Check timer sequencing
Dryer De-pressurizes
Rapidly
Purge valve does not close;
dryer depressurizing through
purge valve
1. Check purge valve and its solenoid valve
2. Refer to earlier steps if no pilot air is detect-
ed
3. Check depressurization timer circuit
Dryer Fails to Purge Purge valve does not close;
Purge valve stuck in closed
position
1. Check timer micro-switch
2. Check solenoid valve.
3. Repair and replace if necessary
Purge muffler is clogged 1. Refer to Purge Muffler replacement proce-
dure.
Purge muffler is clogged 1. Refer to Purge Muffler replacement proce-
dure.
Outlet check valve stuck open 1. Clean check valve
2. Replace check valve if issue persists
Excessive Back-
Pressure in Regener-
ating Tower (above 5
PSIG)
TROUBLESHOOTING GUIDE