Technical data

8-2 160.81-ICOM-GB0 (01/02)
Fault Possible Cause Remedy
Temperature of chilled water too low
with low motor current.
Insufficient load for system capacity. Check slide valve operation and
setting of low water temperature
cut-out.
High Evaporator Pressure
High chilled water temperature. Slide valves fail to open. Check the slide valve solenoid valve.
System overload. Be sure that the slide valve is fully
open (without overloading the motor)
until the load decreases.
Compressor Starts, Normal Oil Pressure Develops, Fluctuates for Short While, then Compressor Stops on Oil
Pressure Cut-out
Oil pressure normal, fluctuates then
compressor stops on Oil Pressure
Cut-out. Display reading: LOW OIL
PRESSURE
Unusual starting conditions exist, i.e.,
oil foaming in reservoir and piping due
to lowered system pressure.
Drain the oil from the compressor and
charge new oil into the compressor.
(Refer to “Oil Charging Procedure).
Burned out oil heater. Replace oil heater.
Oil Pressure Gradually Decreases (Noted by Observation of Daily Log Sheets)
Oil pressure drops to 70% of oil
pressure when compressor was
originally started.
Oil filter is dirty. Change oil filter.
Extreme bearing wear. Inspect compressor.
Oil Pressure System Ceases to return an Oil/Refrigerant Sample
Oil refrigerant return not functioning. Filter-drier in oil return system dirty. Replace old filter-drier with new.
Jet or orifice of oil return jet clogged. Remove jet, inspect for dirt. Remove
dirt using solvent and replace.
System Fails to deliver Oil Pressure
No oil pressure registers. Faulty oil pressure transducer. Faulty
wiring/connectors.
Replace oil pressure transducer.