Sterling Saw A0544325 Benutzerhandbuch
SMC Series Chillers
Page 33
8
Troubleshooting Guide
Problem
Possible cause
Solution
No power.
Check main disconnect
fuses, wiring, and power lead
to the unit.
fuses, wiring, and power lead
to the unit.
Wrong voltage supplied to
the chiller.
the chiller.
Voltage must be within plus
or minus 10% of the
nameplate rating.
or minus 10% of the
nameplate rating.
Defective on/off switch.
Replace.
Control circuit fuse blown.
Replace, check the
transformer.
transformer.
Chiller will not run.
Defective control transformer. Replace.
No process load on the
chiller.
No process load on the
chiller.
Increase the process load.
Pump runs, compressor
cycles at short intervals.
cycles at short intervals.
Refrigerant is low.
Check the refrigerant charge.
Refrigerant is low.
Check the refrigerant charge.
The leaving water
temperature is too high.
temperature is too high.
Improper water/glycol
solution.
solution.
Make sure that the coolant
solution is right for the
process — must be 75%
water and 25% glycol.
See Figure 5 on Page 17 for
more information.
solution is right for the
process — must be 75%
water and 25% glycol.
See Figure 5 on Page 17 for
more information.
Pump pressure is low (see
pump curves).
pump curves).
Check for foreign matter.
Clean the system.
Pump pressure is too high.
Restricted water flow.
Check for partially closed
valves, etc. Be sure all lines
are properly sized.
valves, etc. Be sure all lines
are properly sized.