Nuvair MCH60, Operation Manual

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MCH60
Nuvair Page 17 www.Nuvair.com
MaintenanceSD
Compressor A notification. The maintenance shutdown timer of 168 hours (7 calendar days) begins its
countdown when a scheduled system maintenance alarm (ValveService1, ValveService2,
FilterChangeRequired, or OilChangeRequired) activates. If required service is not performed within one week,
Compressor A shuts down and will not restart without a reset code issued by Nuvair.
MaintenanceSD_B
Compressor B notification. The maintenance shutdown timer of 168 hours (7 calendar days) begins its
countdown when a scheduled system maintenance alarm (ValveService1, ValveService2,
FilterChangeRequired, or OilChangeRequired) activates. If required service is not performed within one week,
Compressor B shuts down and will not restart without a reset code issued by Nuvair.
MotorOverload_Alm
Compressor A alert. The compressor motor is overloaded. The system shuts down immediately and sounds an
alarm.
MotorOverload_Alm_B
Compressor B alert. The compressor motor is overloaded. The system shuts down immediately and sounds an
alarm.
OilChangeRequired
Compressor A alert. After 250 hours of runtime, compressor oil change is required. Alarm sounds.
MaintenanceSD timer activates.
OilChangeRequired_B
Compressor B alert. After 250 hours of runtime, compressor oil change is required. Alarm sounds.
MaintenanceSD_B timer activates.
Phase_Fail_Alm
The compressor rotation is incorrect. The system shuts down immediately and sounds an alarm.
SecondStagePSI_HiAlm
Compressor A alert. The compressor second stage pressure is high and requires evaluation. Alarm sounds.
SecondStagePSI_HiAlm_B
Compressor B alert. The compressor second stage pressure is high and requires evaluation. Alarm sounds.
SecondStagePSI_HiHiAlm
Compressor A alert. The compressor second stage pressure is critically high. The system shuts down
immediately and sounds an alarm.
SecondStagePSI_HiHiAlm_B
Compressor B alert. The compressor second stage pressure is critically high. The system shuts down
immediately and sounds an alarm.
SecondStagePSI_LoAlm
Compressor A alert. The compressor second stage pressure is low and requires evaluation. Alarm sounds.
SecondStagePSI_LoAlm_B
Compressor B alert. The compressor second stage pressure is low and requires evaluation. Alarm sounds.
ThirdStagePSI_HiAlm
Compressor A alert. The compressor third stage pressure is high and requires evaluation. Alarm sounds.