Bryant F, 580J*08--14D appendix Troubleshooting Alarms

580J

Table 18 – Troubleshooting Alarms

	BACnet	ACTION TAKEN BY	RESET
POINT NAME	OBJECT			PROBABLE CAUSE
		CONTROL	METHOD
	NAME
		Alarm Generated
Safety Chain Alarm	safety_chain	Immediate	Automatic	Over load Indoor Fan or Electric Heater overheat.
		Shutdown
		Alarm Generated		Smoke detected by smoke detector or
Fire Shutdown Alarm	fire_alarm	Immediate	Automatic
				configuration incorrect
		Shutdown
Space Temp Sensor		Alarm Generated		Faulty, shorted, or open thermistor caused by
	spt_alarm	Immediate	Automatic
Failure				wiring error or loose connection.
		Shutdown
		Alarm Generated		Faulty, shorted, or open thermistor caused by
SAT Sensor Alarm	sat_alarm	Immediate	Automatic
				wiring error or loose connection.
		Shutdown
High Space Temp Alarm	spt_hi	Alarm Generated	Automatic	The space temperature has risen above the cool
				setpoint by more than the desired amount.
Low Space Temp Alarm	spt_lo	Alarm Generated	Automatic	The space temperature has dropped below the
				heat setpoint by more than the desired amount.
High Supply Air Temp	sat_hi	Alarm Generated	Automatic	SAT is greater then 160 degrees for more than 5
				minutes.
Low Supply Air Temp	sat_lo	Alarm Generated	Automatic	The supply air temperature is below 35_F for
				more than 5 minutes.
Supply Fan Failed to		Alarm Generated		Tripped Circuit Breaker, Broken belt, Bad indoor
	sf_fail	Immediately	Automatic	fan motor, Configuration incorrect, Bad fan status
Start
		disable Operation		switch.
		Alarm Generated
Supply Fan in Hand	sf_hand	Ramp down	Automatic	Bad Fan Status Switch, Configuration incorrect.
		Operations
Compressor Safety	dx_compstat	Alarm Generated	Automatic	Compressor would not start.
Alarm
Setpoint Slider Alarm	slide_alarm	Alarm Generated	Automatic	STO sensor is open or shorted for more then 5
		Offset set to zero		seconds.
			Automatic/re
			set timer
			when	Dirty Filter, supply fan run time exceeded, filter
Dirty Filter Alarm	filter	Alarm Generated	configured
				switch configuration wrong.
			with or
			without
			switch
Switch Configuration		Alarm Generated	Configure	More than one binary input is configured for the
		Disable
	sw_cfg_alarm			same purpose. More then one discrete input is
Alarm		misconfigured switch	correctly
				configured to provide the same function.
		functions
Misconfigured Analog		Alarm Generated	Configure	More then one analog input is configured to
	an_cfg_alarm	Disable 4 selectable
Input			correctly	provide the same function.
		analog inputs
		Alarm Generated		Faulty, shorted, or open thermistor caused by
OAT Sensor Alarm	oat_alarm	Economizer and Low	Automatic
		ambient DX cooling		wiring error or loose connection.
		lockout disabled.
		Alarm Generated		Sensor reading is out of range. Bad sensor, bad
Space RH Sensor Alarm	sprh_alarm	Dehumidification	Automatic
				wiring, or sensor configured incorrectly.
		disabled
Outdoor RH Sensor	oarh_alarm	Alarm Generated	Automatic	Sensor reading is out of range. Bad sensor, bad
Alarm				wiring, or sensor configured incorrectly.
High Space Humidity	sprh_hi	Alarm Generated	Automatic	IRH is greater then 70% for more then 10
				minutes.
Low Space Humidity	sprh_lo	Alarm Generated	Automatic	IRH is less then 35% for more then 10 minutes.
		Alarm Generated
		Disables IAQ		Sensor reading is out of range. Bad sensor, bad
IAQ Sensor Alarm	iaq_alarm	Operation	Automatic
				wiring, or sensor configured incorrectly.
		Economizer moves
		to minimum position
OAQ Sensor Alarm	oaq_alarm	Alarm Generated Set	Automatic	Sensor reading is out of range. Bad sensor, bad
		OAQ to 400		wiring, or sensor configured incorrectly.
High Carbon Dioxide	co2_hi	Alarm Generated	Automatic	CO2 reading is above 1200ppm.
Level
Supply Fan Runtime	sf_rntm	Alarm Generated	clear the	Supply fan run time exceeded user defined limit.
Alarm			timer
Compressor 1 Runtime	dx1_rntm	Alarm Generated	clear the	Compressor run time limit is exceeded.
Alarm			timer
Compressor 2 Runtime	dx2_rntm	Alarm Generated	clear the	Compressor run time limit is exceeded.
Alarm			timer

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