McQuay AGS 225D User Manual

54 OM AGSD-1
High Oil Pressure Difference
Alarm description (as shown on screen): Oil Pres Diff High N
Trigger: Oil Press Differential value exceeds the Oil Press Differential setpoint for a time
greater than Oil Press Delay.
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
Compressor Starter Fault
Alarm description (as shown on screen): Starter Fault N
Trigger:
If PVM set point = None(SSS): any time starter fault input is open
If PVM set point = Single Point or Multi Point: compressor has been running for at least 12
seconds and starter fault input is open
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
Thermistor Card Fault
Alarm description (as shown on screen): Motor Temp High N
Trigger: Open on digital input: EXB1 ID1(circuit#1) EXB1 ID2(circuit#2) and EXB5
ID1(circuit#3)
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
Low OAT Restart Fault
Alarm description (as shown on screen): LowOATRestart Fail N
Trigger: Circuit has failed three low OAT start attempts
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.
No Pressure At Startup
Alarm description (as shown on screen): No Press At Start N
Trigger: [Evap Pressure < 5 psi OR Cond Pressure < 5 psi] AND Compressor start
requested
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
CP2 pLAN Failure
Alarm description (as shown on screen): pLAN Failure CP2
Trigger: Circuit three controller not found on pLAN for 60 seconds. Only applies to three
circuit chillers with two large controllers.
Action Taken: Rapid stop circuit three
Reset: Auto clear when CP2 is communicating with CP1 via pLAN

McQuay AGS 225D Specifications

General

Brand	McQuay
Model	AGS 225D
Category	Air Compressor
Language	English