Technical data

Displayed Reason for
Shutdown
Control Function Possible Cause Recommended Action
LOW EVAP PRESSURE
Evaporator pressure below
172 kPa
Blocked / dirty evaporator
tubes
Clean tubes
Insufficient load for
compressor capacity
Check low water
temperature cut-out setting
Check slide valve operation
Insufficient refrigerant Check charge level
Blocked orifice Check orifice
LOW EVAP PRESSURE-
BRINE
Evaporator low pressure
switch contacts open
As for LOW EVAP
PRESSURE
As for LOW EVAP
PRESSURE
EVAP TRANS OR PROBE
ERROR
Leaving chilled liquid temp
less calculated evaporator
saturation tem p is more
than 13.9 °C or less than
-1.4 °C
Defective evaporator
pressure transducer or
wiring
Check transducer operation
and wiring
Defective leaving water
temperature sensor or
wiring
Check sensor operation
and wiring
Oil System Control Centre Initiated Shutdowns - Manual Reset Restart
Displayed Reason for
Shutdown
Control Function Possible Cause Recommended Action
HIGH OIL TEMP
Oil temp. More than 76.7°C Blocked oil filter or
restricted oil cooler line
Check for correct oil flow
and cooler operation
CLOGGED OIL FILTER
Oil filter pressure diff. More
than 172 kPa for more than
5 seconds
Oil line blockage Check for blocked oil filter
Check oil line service
valves are open
LOW OIL PRESSURE
Oil pressure differential less
than 138 kPa with
compressor running
No oil flow Check all oil system service
valves are open
OIL PRESSURE
TRANSDUCER
Oil pressure at entry to
compressor measured as
more than 2069 kPa while
compressor is running
Defective oil pressure
transducer or wiring
Check transducer operation
and wiring
LOW SEPARATOR OIL
LEVEL
Oil level float switch open Low oil level Determine if there is a leak
or there is an oil system
fault (see separate table)
Defective float switch or
wiring
Check float switch
operation and wiring
FAULTY OIL OR
CONDENSER XDCR
(transducer)
Oil pressure at entry to
compressor measured as
more than 138 kPa above
condenser pressure for
more than 10 minutes
Defective discharge or oil
pressure transducer or
wiring
Check transducer operation
and wiring
035L02381-GB0 8-3