ClimaCool IOM FLEX SERIES - Manual (Page 46)

www.climacoolcorp.com www.climacoolcorp.com
®
44
Troubleshooting Guide
2
www.climacoolcorp.com
Troubleshooting Guide
COMPRESSOR CYCLES ON HIGH PRESSURE CONTROL
Possible Cause Remedy
1. Main condenser water valve closed 1. Open water valve
2. Water reg. valve incorrectly set or defective 2. Reset or replace
3. Compressor discharge valve partially closed 3. Open valve to full open position
4. Non-condensable gases in hydronic system 4. Purge non-condensable gases from bleed valve on condenser or at
bleed valve of the building condenser water system
5. Overcharge of refrigerant (R-22 or R-407C) 5. Purge refrigerant from system while in operation until the first sign of
bubbles are shown in sight glass. Add back refrigerant just until
bubbles clear
6. Condenser water temperature high 6. Check water supply temperature against requirements; if cooling
tower is used check spray nozzles on cooling tower
7. Improper condenser water circulation 7. Use an ample sized cleanable strainer in the condenser water circuit.
Make certain in the strainer is clean to insure full flow of condenser
water (strainer screen must be 60 mesh minimum)
8. Insufficient water flow through the condenser 8. Check water flow thru condenser against design requirements
9. Fouled condenser brazed plate heat exchanger 9. Clean-in-place heat exchanger as described in previous section
10. Defective high pressure switch 10. Replace high pressure switch
CAUSES AND PREVENTION OF FREEZE-UP
Possible Cause Prevention
1. Improper charging 1. Charge per ClimaCool®’s data plate information located on the unit
2. Improperly set low pressure freeze control 2. Check the safety time delay low pressure control for proper setting
at the beginning of each season
3. Operating with low pressure control bypassed 3. The safety time delay low pressure control is wired in series with the
compressor motor contactors (do not bypass)
4. Improper chilled water circulation 4. Use an ample sized cleanable strainer in the chilled water circuit.
Make certain in the strainer is clean to insure full flow and velocity
of chilled water. It may sometimes be necessary to treat the water to
prevent formation of deposits
5. Not draining for winter shutdown 5. When the system is shut down for the winter, remove the drain plugs
and drain the cooler. Blow out remaining water with air
6. Improper setting of low water temperature control 6. Check setting of (freeze-stat) temperature control