IOM 1274-3 • CENTRIFUGAL WATER CHILLERS 60 www.DaikinApplied.com
Table 22: Critical Alarms
Screen Text Action Taken Troubleshooting Clear
Evaporator Pressure Low Rapid Stop
Low or No Evaporator Water Flow. Low refrigerant level in evaporator. Incorrect setpoint value for
leaving water temperature.
Manual
Discharge Pressure High Rapid Stop Low or no condenser water Flow Manual
Vanes Not Closed Rapid Stop Manual
Oil Pressure Low Rapid Stop Manual
Oil Feed Temperature Low Rapid Stop Manual
Oil Feed Temperature High Rapid Stop Manual
RLA Low (motor open) Rapid Stop Manual
Discharge Temperature High Rapid Stop Low or no condenser water Flow Manual
High Pressure Switch Rapid Stop Manual
Motor Temperature High Rapid Stop
Rotor and/or stator cooling circuit fault
Motor stator cooling solenoid not open, rotor cooling stepper motor not functioning correctly,
motor rotor superheat or gain setpoints incorrect (contact factory)
Manual
Surge Detected - Running Rapid Stop Surge Temperature = the suction temperature minus the leaving chilled water temperature. Manual
Surge Condition Rapid Stop/No Start Surge condition detected while starting Manual
No Starter Transition Rapid Stop/No Start Manual
Starter Fault Rapid Stop Manual
Prelube Cycle Failed Rapid Stop/No Start Oil pressure too low to start compressor. Manual
Evaporator Water Flow Loss Rapid Stop
Manual
Condenser Water Flow Loss Rapid Stop
Manual
Sensor Fault: Evap LWT Rapid Stop Manual
Sensor Fault: Evap Sat Press Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
Sensor Fault: Cond Sat Press Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
Sensor Fault: Suction Temp Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
Sensor Fault: Discharge Temp Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
Sensor Fault: Oil Feed Temp Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
Sensor Fault: Oil Sump Temp Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
Sensor Fault: Oil Feed Pressure Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
Sensor Fault: Oil Vent Pressure Rapid Stop/No Start Sensor shorted or open. Check for loose wires or failed sensor Manual
External Input Comp Fault Rapid Stop Manual
Starter Current Overload Rapid Stop Manual
Starter Current Imbalance Rapid Stop Manual
Starter Phase Loss Rapid Stop Manual
Starter Phase Order Rapid Stop Manual
Starter Over Volt Rapid Stop Manual
Starter Under Volt Rapid Stop Manual
Ground Fault Rapid Stop Manual
Sensor Fault: Leaving Heat
Recovery
Rapid Stop Manual
External Fault Digital Input Rapid Stop Manual
Motor Temperature Trip - NTC Rapid Stop Manual
Motor Temperature Trip - DI Rapid Stop Manual
IGV Actuator Fault Rapid Stop Manual
IGV Position Tracking Error Rapid Stop Manual
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