10. Troubleshooting; Heatsink - ZEKS 1000HSFA400 Technical Manual

10. TROUBLESHOOTING

10.1 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.
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."
10.2 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.
WARNING
WARNING
POSSIBLE
CAUSE
Drain failure or timer Depress "TEST" button - if drain
adjustment is required valve operates then adjust timing
(See Section 6.3)
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.
Excessive flow Check inlet and outlet pressures
and system design capacity.
Dryer by-pass valve Correct cause of excessive flow.
not closed Close by-pass valve
No power to the dryer Check power supply and
fuses/circuit breakers
High suction pressure Check and clean ambient air filter.
Refrigerant leak Check suction pressure gauge if
reading is 0 psig, turn dryer off and
contact your distributor
Compressor not Check and clean ambient air filter.
running and fan is Check ambient temperature and
running reduce below 113°F
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CORRECTIVE ACTION