ZEKS CFX NC Series, Technical Manual

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10.2 PROBLEM / ACTION GUIDE
PROBLEM
Moisture down stream
SYMPTOM(S)
Dryer is properly
cooling air stream
(Check Chiller. Temp
on controller)
Inlet and outlet temper-
atures 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
High suction pressure
Refrigerant leak
Compressor not
running and fan is
running
CORRECTIVE ACTION
Depress “TEST” button - if drain
valve operates then adjust timing
(See Section 6)
Depress “TEST” button - if DRAIN
TEST is displayed but valve does
not open, ensure wiring connec-
tions are secure and power is being
applied to the solenoid coil. If valve
continues not to open, clean as
described in Maintenance Section
of this manual.
Depress “TEST” button - if display
does not indicate DRAIN TEST,
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
Check and clean ambient air filter.
Check suction pressure gauge if
reading is 0 psig, turn dryer off and
contact your distributor
Check and clean ambient air filter.
Check ambient temperature and
reduce below 113°F
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.”
10. TROUBLESHOOTING
10.1 INTRODUCTION
ZEKS dryers are designed for reliable, trouble-free operation. In the event of any
dryer malfunction, the guide below has been developed to facilitate problem identifi-
cation and corrective actions.