19
9.2 PROBLEM / ACTION GUIDE
PROBLEM
Moisture down stream
SYMPTOM(S)
Dryer is properly
cooling air stream
(Check Exch. Temp on
controller)
Inlet and outlet
temperatures are the
same.
POSSIBLE CAUSE
Drain failure or timer
adjustment is required
Excessive flow
Dryer by-pass valve not
closed
No power to the dryer
CORRECTIVE ACTION
Depress “Drain Test” button - if
drain valve operates, then adjust
timing (See Section 6.3)
Depress “Drain Test” button - if
“Drain Open Light” comes on but
valve does not open, ensure wiring
connections are secure and power
is being applied to the solenoid coil.
If valve continues not to open,
clean as described in Section 8.3.
Depress “Drain Test” button - if
“Drain Open Light” does not come
on, contact distributor.
Check inlet and outlet pressures
and system design capacity.
Correct cause of excessive flow.
Close by-pass valve
Check power supply and
fuses/circuit breakers
An air dryer always operates under pressure. Any maintenance procedure that
involves disassembly of pipe fittings, valves or any other components requires the
dryer be isolated from the compressed air stream and fully depressurized.
Prior to working on the unit, make sure that all circuit breakers or disconnected
switches are tagged “Out of Service.”
9. TROUBLESHOOTING
9.1 INTRODUCTION
ZEKS HeatSink™ dryers are designed for reliable, trouble-free operation. In the
event of any dryer malfunction, the guide below has been developed to facilitate
problem identification and corrective actions.
WARNING
WARNING