AEC Glacier Series Air and Water Cooler Portable Chillers - Manual (Page 63)

Page 62 Glacier Series Portable Chillers
Problem Possible cause Solution
Pump runs; compressor does
not (cont’d.) Compressor contactor
holding coil open. Repair or replace.
Defective pump motor to
compressor interlock control
circuit. Repair or replace.
Broken wire in the
compressor control circuit. Locate and repair.
Pump runs, compressor
cycles at short intervals. Freeze control setting too
high. Lower set point to 10°F
below desired leaving water
temperature.
Water temperature is too
high. Antifreeze mixture
inadequate for process. Make sure that the antifreeze
mixture protection is right for
the process.
Defective or improperly-set
freezestat. Adjust or replace.
Refrigerant low pressure
switch is set too high. Call service to adjust
pressure control.
Refrigerant charge is low. Call service to find and repair
the leak, then have
refrigerant added.
Pump pressure low (refer to
curves for normal pressure
for various pumps). Pump running in reverse. Verify rotation; if running in
reverse rotation, reverse any
two main power leads. Re-
verify for correct pump
rotation.
Check for foreign matter. Clean the system.
Pump pressure is too high. Restricted water flow. Check for partially closed
valves etc. Make sure that all
lines are properly sized.
Unit runs continuously, but Restricted condenser air. Clean filters.
not enough cooling power. Clean condenser.
Unit low on refrigerant. Check the refrigerant charge.
Compressor not operating
efficiently. Call service.
Unit under-sized for
application. Call sales rep.