Sterling 30RA010-055 manual Alarm and Alert Codes cont

Table 29 — Alarm and Alert Codes (cont)

ALARM/	ALARM		WHY WAS THIS	ACTION TAKEN	RESET	PROBABLE
ALERT	OR	DESCRIPTION	ALARM
				BY CONTROL	METHOD	CAUSE
CODE	ALERT		GENERATED?
A140	Alert	Reverse Rotation	Incoming chiller power	Chiller not allowed to	Manual	Reverse any two
		Detected	leads not phased correctly	start.		incoming power
						leads to correct.
						Check for correct fan
						rotation first.
A150	Alarm	Emergency Stop	SCN emergency stop	Chiller shutdown	Automatic once SCN	SCN Network
			command received	without going through	command for	command.
				pumpdown.	EMSTOP returns to
					normal
A151	Alarm	Illegal Configuration	One or more illegal	Chiller is not allowed to	Manual once	Configuration error.
			configurations exists.	start.	configuration errors	Check unit settings.
					are corrected
A152	Alarm	Unit Down Due to	Both circuits are down due	Chiller is unable	Automatic once	Alarm notifies user
		Failure	to alarms/alerts.	to run.	alarms/alerts are	that chiller is 100%
					cleared that prevent	down.
					the chiller from
					starting.
T153	Alert	Real Time Clock	Internal clock on MBB fails	Occupancy schedule	Automatic when	Time/Date/Month/
		Hardware Failure		will not be used. Chiller	correct clock control	Day/Year not
				defaults to Local On	restarts.	properly set.
				mode.
A154	Alarm	Serial EEPROM	Hardware failure with MBB	Chiller is unable	Manual	Main Base Board
		Hardware Failure		to run.		failure.
T155	Alert	Serial EEPROM	Configuration/storage	No Action	Manual	Potential failure of
		Storage Failure	failure with MBB			MBB. Download
						current operating
						software. Replace
						MBB if error occurs
						again.
A156	Alarm	Critical Serial EEPROM	Configuration/storage	Chiller is not allowed	Manual	Main Base Board
		Storage Failure	failure with MBB	to run.		failure.
A157	Alarm	A/D Hardware Failure	Hardware failure with	Chiller is not allowed	Manual	Main Base Board
			peripheral device	to run.		failure.
A189	Alarm	Cooler pump auxiliary	Pump 1 (2) aux contacts	Both pump outputs	Manual	Wiring error, faulty
		contact inputs miswired	closed when pump 2 (1)	are turned off.		pump contactor
			energized.			auxiliary contacts.
T173	Alert	Loss of Communication	MBB loses communication	4 to 20 mA	Automatic	Wiring error, faulty
		with EMM	with EMM	temperature reset		wiring or failed
				disabled. Demand		Energy Manage-
				Limit set to 100%. 4 to		ment Module (EMM).
				20 mA set point
				disabled.
T174	Alert	4 to 20 mA Cooling Set	If configured with EMM and	Set point function	Automatic	Faulty signal
		Point Input Failure	input less than 2 mA or	disabled. Chiller		generator, wiring
			greater than 22 mA	controls to CSP1.		error, or faulty EMM.
T176	Alert	4 to 20 mA	If configured with EMM	Reset function	Automatic	Faulty signal
		Temperature Reset	and input less than 2 mA or	disabled. Chiller		generator, wiring
		Input Failure	greater than 22 mA	returns to normal set		error, or faulty EMM.
				point control.
T177	Alert	4 to 20 mA Demand	If configured with EMM and	Demand limit function	Automatic	Faulty signal
		Limit Input Failure	input less than 2 mA or	disabled. Chiller		generator, wiring
			greater than 22 mA	returns to 100%		error, or faulty EMM.
				demand limit
				control.
T189	Alarm	Cooler pump 2 and	Alarm is generated when	Chiller not allowed to	Manual	Wiring error
		Aux Contact Input	the pump’s aux contacts	start
		miswired	close when a pump is
			called for
T190	Alert	Cooler pump 1 Aux	Pump 1 Auxiliary Contacts	Pump 1 turned off.	Manual	Wiring error, faulty
		Contacts Failed to Close	did not close within	Pump 2 will be started		contacts on pump
		at Start-Up	26 seconds after pump	if available.		contactor
			was started
T191	Alert	Cooler pump 2 Aux	Pump 2 Auxiliary Contacts	Pump 2 turned off.	Manual	Wiring error, faulty
		Contacts Failed to Close	did not close within	Pump 1 will be started		contacts on pump
		at Start-Up	26 seconds after pump	if available.		contactor
			was started
T192	Alert	Cooler pump 1 Failed	Pump 1 did not provide	Pump 1 turned off.	Manual	Wiring error, pump
		to Provide Flow at	flow to close flow switch	Pump 2 will be started		circuit breaker
		Start-Up	within 60 seconds	if available.		tripped, contactor
						failure
T193	Alert	Cooler pump 2 Failed	Pump 2 did not provide	Pump 1 turned off.	Manual	Wiring error, pump
		to Provide Flow at	flow to close flow switch	Pump 2 will be started		circuit breaker
		Start-Up	within 60 seconds	if available.		tripped, contactor
						failure
T194	Alert	Cooler pump 1 Aux	Pump 1 Auxiliary Contacts	Pump 2 will be started	Manual	Wiring error, faulty
		Contacts Opened	open for 26 seconds after	if available. Chiller		contacts on pump
		During Normal	initially made. All	allowed to run if		contactor
		Operation	compressors shut down.	Pump 2 successfully
			Pump 1 turned off.	starts.
T195	Alert	Cooler pump 2 Aux	Pump 2 Auxiliary Contacts	Pump 1 will be started	Manual	Wiring error, faulty
		Contacts Opened	open for 26 seconds after	if available. Chiller		contacts on pump
		During Normal	initially made. All	allowed to run if		contactor
		Operation	compressors shut down.	Pump 1 successfully
			Pump 2 turned off.	starts.

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