Daikin WCT Series Operating & Maintenance Manual page 48

Table 18, Problem Alarm Description
Description
Low Evaporator Pressure
– Inhibit Loading
Low Evaporator Pressure
– Unload
Evaporator Freeze Protect
Condenser Freeze Protect
High Discharge
Temperature
A warning is annunciated whenever an abnormal condition exists which does not affect chiller operation.
Table 19, Warning Alarm Description
Liquid Line Refrigerant
Temperature Sensor Fall Warning
Entering Evaporator Water
Temperature Sensor Fall Warning
Leaving Condenser Water
Temperature Sensor Fail Warning
Entering Condenser Water
Temperature Sensor Fail Warning
Evaporator Pressure Sensor Fault
OMM WCT
Occurs When:
Pressure < Low Evap Pressure–
Inhibit setpoint
Pressure < Low Evap Pressure–
Unload setpoint
Evap Sat Refr Temp < Evaporator
Freeze SP
Cond Sat Refr Temp < Condenser
Freeze SP
Temperature > High Discharge
Temperature-Load SP AND Suction
superheat < 15°F
WARNING
Centrifugal Chillers
Action Taken
Inhibit loading
Unload
Start evaporator
pump
Start condenser
pump
Load
CONDITION
Sensor is shorted or open
Sensor is shorted or open
Sensor is shorted or open
Sensor is shorted or open
Sensor is shorted or open
Reset
Evap Press rises
above (SP + 3psi)
Evap Press rises
above (SP + 3psi)
Temp > (Evaporator
Freeze SP + 2°F)
Temp > (Condenser
Freeze SP + 2°F)
Temp < (High Dsch
Temp Load SP – 3°F)
OR Superheat > 18°F
D-EOMWC01302-16EN - 48/84