McQuay AWS User Manual

42 KOMAC00607-09EN
Oil Level Switch
Alarm description (as shown on screen): Oil Level Low N
Trigger: Oil level switch open for a time greater than Oil level switch Delay while
compressor is in the Run state.
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 14 seconds and starter fault input is open
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
High Motor Temperature
Alarm description (as shown on screen): Motor Temp High
Trigger:
Input value for the motor temperature is 4500 ohms or higher.
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad after
input value for motor temperature has been 200 ohms or less for at least 5 minutes.
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 Pressure Change After Start
Alarm description (as shown on screen): NoPressChgAtStrt N
Trigger: After start of compressor, at least a 1 psi drop in evaporator pressure OR
5 psi increase in condenser 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 AND circuit does not have a fan VFD
Action Taken: Rapid stop circuit
Reset: This alarm can be cleared manually via the Unit Controller keypad.
CC Comm Failure N
Alarm description (as shown on screen): CC Comm. Fail N
Trigger: Communication with the I/O extension module has failed. Section 3.1
indicates the expected type of module and the address for each module.
Action Taken: Rapid stop of affected circuit
Reset: This alarm can be cleared manually via the keypad when communication
between main controller and the extension module is working for 5 seconds.
FC Comm Failure Circuit 1/2
Alarm description (as shown on screen): FC Comm Fail Cir 1/2

McQuay AWS Specifications

General

Brand	McQuay
Model	AWS
Category	Chiller
Language	English