SPX HANKISON HES Series, Инструкция по эксплуатации

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TROUBLESHOOTING GUIDE - STANDARD CONTROLLER (MODELS 90-675)
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION
A) Water downstream of dryer
1. Residual free moisture remaining in
downstream pipelines.
2. Air bypass system is open.
3. Inlet and Outlet connections are reversed.
4. Air lines downstream of dryer are exposed
to temperatures below the dew point.
5. Excessive free moisture (bulk liquid) at
dryer inlet.
6. Condensate not being drained
Drain mechanism is clogged or inoperative.
Drain line is restricted or frozen.
Electric drains-timer not set to allow for
sufficient condensate removal.
7. Dryer overloaded resulting in elevated dew
point.
8. Refrigeration system not functioning.
Blow out system with dry air.
Check valve positions.
Check for correct connection.
Insulate or heat trace air lines exposed to low
ambients or dry air to lower dew point.
Install separator ahead of dryer.
Replace drain mechanism if inoperative.
Open drain line.
Electric drains-reset time so that all liquid is
discharged.
Check inlet air temperature and pressure, flow
rate (compressor capacity) and ambient air or
water temperature.
See D below.
B) High pressure drop across
dryer
1. Excessive air flow.
2. Freezing of moisture in evaporator.
because of refrigeration system fault.
3. Separator filter element clogged.
Check flow rate.
See D below.
Replace filter element.
C) Dew point indicator in red
area
1. Dryer overloaded resulting in high air
outlet temperature.
2. Refrigeration system not functioning
properly.
3. Glycol pump not operating.
See A 7.
See D below.
Replace pump cartridge.
Check for power to pump.
D) Refrigeration system not
functioning properly
1. Dryer on light off
2. Insufficient cooling for the
refrigeration unit.
a. Power failure.
b. Line disconnect switch open.
c. Blown fuses, open breaker.
d. Faulty wiring, loose terminals.
e. Dryer on/off switch is off.
a. Air-Cooled
Clogged Condenser.
Faulty fan motor.
Faulty fan pressure switch.
b. Water-Cooled
Clogged water strainer.
Insufficient water pressure.
Water regulating valve mis-adjusted or
defective.
Check for power to unit.
Close disconnect switch.
Check for continuity.
Have electrician check electrical connections.
Depress switch to “on” position.
Clean condenser face.
Check / replace motor.
Check / replace switch.
Clean water strainer.
Check water pressure during period of high
water flow demand.
Check / adjust / replace.
NOTE: If problem persists, contact a qualified refrigeration repairman or manufacturer’s service department