McQuay WGS160AW User Manual

OM WGS-5 WGS 130A to 190A 37
High Lift Pressure
Alarm description (as shown on screen): Lift Pressure High N
Trigger: Condenser Saturated Temperature > Max Saturated Condenser Value for time >
High Lift Delay set point
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
Mechanical High Pressure
Alarm description (as shown on screen): Mech High Pressure N
Trigger: Mechanical High Pressure switch input is low
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad if the MHP
switch input is high.
High Discharge Temperature
Alarm description (as shown on screen): Disc Temp High N
Trigger: Discharge Temperature > High Discharge Temperature set point AND compressor
is running AND Discharge Temperature Sensor Fault is not active
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
Low Oil Level
Alarm description (as shown on screen): Oil Level Low N
Trigger: Oil Level Switch input is open for time greater than Low Oil Level Delay while
compressor is in the Run state AND the Low Oil Level Event has occurred in the past hour.
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
High Oil Pressure Difference
Alarm description (as shown on screen): Oil Pres Diff High N
Trigger: Oil DP switch input is low for time greater than High Oil Pressure Difference
Delay set point AND compressor is running
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
Low Evaporator Pressure Start
Alarm description (as shown on screen): LowPress StartFail N
Trigger: Saturated condenser temperature greater than 70°F at start and circuit failed a Start Logic
attempt.
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
No Evaporator Pressure Drop After Start
Alarm description (as shown on screen): No Evap Press Drop N
Trigger: After start of compressor, at least a 1 psi drop in evaporator pressure has not
occurred after 15 seconds
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.

McQuay WGS160AW Specifications

General

Brand	McQuay
Model	WGS160AW
Category	Chiller
Language	English