ClimaCool SHC onDEMAND 30, 50, 70, 85 Manual - Manual (Page 61)

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Main condenser water valve closed or restricted Open valve to full open position
Module condenser water isolation valves, if
provided, closed or restricted Open valves to full open position
Water regulating valve incorrectly set or
defective Reset or replace
Compressor discharge valve partially closed Open valve to full open position
Non-condensable gases in hydronic system Recover non-condensable gases from bleed valve on condenser
or at bleed valve of the building condenser water system
Overcharge of refrigeration Recover refrigerant from system while in operation until the first
sign of bubbles are shown in the sight glass. Add back refrigerant
just until bubbles clear.
Condenser water temperature high Check water supply temperature against requirements; if cooling
tower is used check spray nozzles on cooling tower.
Improper condenser water circulation Use an ample sized cleanable strainer in the condenser water
circuit; make certain the strainer is clean to insure full flow of
condenser water (strainer must be 60 mesh minimum). It may
sometimes be necessary to treat water to prevent formation of
deposits.
Insufficient water flow through the condenser Check water flow through condenser against design
requirements
Fouled condenser brazed plate heat exchanger Clean-in-place heat exchanger as described in IOM (page 31)
Defective high pressure switch Replace high pressure switch
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Improper charging Charge per ClimaCool data plate information, located on the
chiller, following the Superheat and Subcooling procedure
described in IOM (page 27)
Improper chilled water circulation Use an ample sized cleanable strainer in the chilled water circuit;
make certain the strainer is clean to insure full flow and velocity
of chilled water (strainer screen must be 60 mesh minimum). It
may sometimes be necessary to treat water to prevent formation
of deposits.
Not draining for winter shutdown When the system is shut down for the winter, remove the drain
plugs from the flush ports and drain the cooler. Blow out
remaining water with air.
Faulty leaving chilled solution temperature Verify sensor calibration using a calibrated thermometer and
replace if defective.
Wrong freeze-up protection temperature
setpoint Verify leaving chilled solution freeze protection temperature
setpoint to be set at 6
o F above solution freeze point
Troubleshooting Guide
WARNING
To avoid the release of refrigerant into the atmosphere,
the refrigerant circuit of this unit must be serviced only by
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requirements.
All refrigerant discharged from this unit must be recovered
WITHOUT EXCEPTION. Technicians must follow industry
accepted guidelines and all local, state and federal statutes for
the recovery and disposal of refrigerants.
If a compressor is removed from this unit, system refrigerant
circuit oil will remain in the compressor. To avoid leakage of
compressor oil, the refrigerant lines of the compressor must
be sealed after it is removed.
Note: See page 41 for Troubleshooting for ATF Package