ALARMS

This can be identified as one of the key feature of the IBMS and main purpose is when an abnormality occurs the system responds by means of alarm notifications as specified in the alarm configuration. Basically four common types can be recognized as follows,

§ Out of range

§ Floating limit

§ Change of state

§ Command failure

Both out of range and floating limit alarm types monitored only analog value such as temperature, floor rate etc…and change of state and command failure types monitored only digital values.

Alarms and Warnings

The BMS shall include an Alarm Log, and shall be capable of recording when an alarm condition starts, when the alarm is acknowledged by whom the alarm is acknowledged, and when the alarm condition is removed.

Critical Alarms - Insert specific Critical Alarm action scheme here and it will take action via interlocks or operator procedural response to shut the equipment down and notify the operator of the conditions. The operator will be required to recognize the alarm before the alarm can be reset and the system restarted. Once the alarm is reset, the operator may restart the system.

Informational Messages will notify the operator and take no further action and the equipment will have the following critical alarms and warnings

BMS alarms

informational message	alarm		response
	critical	Informational massages	Interlocks	Operator procedural
Zone X High Temperature	X		X
Control Platform Communication Watchdog	X		X
Control Power Fault	X		X
Main Instrument Air Fault	X		X
Zone X Low Temperature	X			X
Zone X Low Diff. Pressure	X			X
Zone X High RH	X		X
Motor Faults	X		X
Control platform battery low warning		X

The list of critical alarms in the table is not intended to be a comprehensive list of all alarms for the system.

For a standard equipment type application, request the supplier to submit the complete alarm list and differentiate between critical and non-critical alarms. Consider documenting how “critical and non-critical” criterions were determined.

Alarms related to the Air- conditioning system

Alarms for HVAC

EQUIPMENT	ALARM	SET POINTS
Chiller system	Compressor fault	No
	Failure of the compressor	No
	Failure of the condenser water pump	No
	CHW evaporate low flow Alarm	Chilled water flow rate set points
	Chillers trip alarm	No
	Exceed acceptable chilled water inlet temperature	Chilled water inlet temperature set points
	Exceed acceptable chilled water out temperature	Chilled water out temperature set points
	Exceed acceptable condenser water in temp.	Condenser water in temperature set points
	Exceed acceptable condenser water out temp.	Condenser water out temperature set points
	Oil pressure exceed the acceptable range	Oil pressure set points
	Oil pressure below the acceptable range	Oil pressure set points
	Oil temperature exceed adequate range	Oil temperature set points
	Oil temperature less than the acceptable level	Oil temperature set points
	Suction pressure exceed the acceptable pressure (bar)	Suction pressure temperature set points
Chiller system	Suction pressure less than the acceptable level	Suction pressure temperature set points
	Cooling tower fan failure	No
Air Handling Units (AHU)	Failure of the AHU supply fan	No
	Failure of the AHU return fan	No
	Supply air temperature exceed or less than the temperature set points	AHU supply air temperature set points
	Temperature of the room exceed or less than required room temperature	AHU room temperature set points
	AHU dirty filter	No
	AHU fan trip due to overload	No
	Smoke detector trip alarm	No
Fan Coil Units (FCU)	Failure of the FCU fan	No
	FCU fan trip	No
	chilled water in and out temperature exceed or less than acceptable temperature	Chilled water in and out temperature set points
	Supply and return air temperature exceed acceptable temperature range	Supply and return air t temperature set points