Bryant 580J*04--12 Manual de instalación descargar pdf (Pagina 28)

Alarms

Alarms are provided to indicate a possible problem with

the controller or unit. Alarms can be checked through a

network and/or the local access device. All alarms are

listed in Table 4 with name, object name, action taken by

control, reset method, and possible cause. Some alarms

can occur based on specific configurations.

Safety Chain Alarm

This alarm occurs immediately if a field installed,

normally closed, safety contact opens and interrupts

24VAC signal input #4 (J1--9). The Unit Status will be

Shutdown and the System Mode will be Disable. All unit

operations stop immediately and will not restart until the

alarm automatically clears. There are no configurations

for this alarm; it is all based on field installed wiring. This

alarm will not occur if Fire Shutdown Alarm is active.

Normal operation resumes when the safety chain circuit is

complete.

Fire/Smoke Shutdown Alarm

This alarm occurs immediately when the smoke detector

senses smoke. The Unit Status will be Shutdown and the

System Mode will be Disable. All unit operations stop

immediately and will not restart until the alarm

automatically clears. If there is not a smoke detector

installed or the smoke detector did not trip, check input

configurations.

NOTE: The default function for input 5 is a normally

open Fire Shutdown input.

Gas Valve Alarm

This alarm occurs 60 second after gas heat has been

de--energized but the Integrated Gas Control (IGC) board

is still indicating a need for fan operation. Upon alarm

detection, the fan will start immediately and run at its

highest speed.

Supply Fan Failure

This alarm occurs when the indoor fan is being command

on and the fan status switch feedback is showing the fan

off. This will end current operating mode and disable unit

operation. This alarm requires a fan status switch to be

configured on one of the inputs.

Supply Fan in Hand

This alarm occurs when the indoor fan is being

commanded off and the fan status switch feedback is

showing the fan is on. This will prevent any operating

mode and disable unit operation. This alarm requires a fan

status switch to be configured on one of the inputs.

Compressor Status

This alarm indicates the base unit’s compressor safety

circuit is energized. Cooling, heating, and supply fan

outputs are not interrupted. Normal operation resumes

when the compressor safety circuit is de-energized. This

alarm requires field use of this described compressor

safety circuit.

Space Temp Sensor

This alarm occurs if the space sensor wired to the RTU

Open is disconnected or shorted for more than 10 seconds or

if the SPT value from the Network is no longer being

received. When this occurs the Unit Status will be Shutdown

and the System Mode will be Run. Sensor, sensor

connections, wiring, board connection, and configurations

should be checked for faults or errors. Alarm will reset

automatically when cause is fixed.

ZS Sensor

This alarm occurs if the ZS sensor wired to the RTU Open

stops communicating with the controller.

ZS Sensor -- This alarm indicates a communication

failure of a connected ZS sensor that previously had been

actively communicating. The alarm is reset when normal

ZS sensor communications resume, if power is cycled to

the controller, or if the Shutdown point is set to Active.

ZS Configuration -- This alarm indicates that at least one

ZS sensor is configured in the Sensor Binder properties

and is not actually communicating. The alarm is reset

when the configured ZS sensor is communicating or the

configuration is changed to reflect the sensor is no longer

connected to the Rnet.

Supply Air Temp Sensor

This alarm occurs immediately when the supply air

temperature sensor wired to the RTU Open is

disconnected or shorted. When this occurs the Unit Status

will be Shutdown and the System Mode will be Run.

Sensor, sensor connections, wiring, board connection, and

configurations should be checked for faults or errors.

Alarm will reset automatically when cause is fixed.

Local OAT Sensor

This alarm occurs when the outdoor air sensor indicates a

short or open circuit or the Network OAT value is no

longer being received. Economizer cooling and optimal

start functions are disabled. Normal operation resumes

when the controller detects a valid sensor.

Outdoor Air Temp Sensor

This alarm indicates that a valid OAT sensor value is no

longer available to the controller after having been

available previously.

Economizer Operation -- This alarm is active whenever

an economizer fault is detected as required by California

Title 24 Economizer FDD logic. Once detected, this alarm

will stay active until the Shutdown input is set to Active

or the fan is stopped.

Economizer -- This point indicates the specific fault

detected and annunciated by the Economizer Operation

alarm above. Detected fault conditions include: Failed to

Fully Open, Failed to Open, Failed to Close, and Stuck

Open.

Space Relative Humidity Sensor

This alarm indicates the mA input at the associated

channel falls below 3.5 mA or rises above 21 mA, or the

Network value for space RH is no longer being received.

Cooling, heating, and supply fan operation continues,

however, the controller’s Perfect Humidityt binary

output is disabled until the fault condition is corrected.

IAQ Sensor

This alarm indicates the mA input at the associated

channel falls below 3.5 mA or rises above 21 mA, or the

Network value for space RH is no longer being received.

Cooling, heating, and supply fan operation continues.

However, the controller’s IAQ control function is disabled

until the fault condition is corrected.

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Bryant 580J*04--12 Manual de instalación Pagina 28

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