Bard FUSION-TEC HR58APA Installation Support Materials page 53

Signal Description
The alarm is activated
Mixed Air
if the sensor is faulty, a
Temperature
sensor wire is loose or
Sensor Failed
an out-of-range value
Alarm
is read.
The alarm is activated
Outdoor
if the sensor is faulty, a
Temperature
sensor wire is loose or
Sensor Failed
an out-of-range value
Alarm
is read.
The alarm is activated
Outdoor if the sensor is faulty, a
Humidity Sensor sensor wire is loose or
Failed Alarm an out-of-range value
is read.
The alarm is activated
Return Air
if the sensor is faulty, a
Temperature
sensor wire is loose or
Sensor Failed
an out-of-range value
Alarm
is read.
High Mixed Air During economizer
Temperature operation, MAT was
Alarm above alarm setpoint.
Low Mixed Air During economizer
Temperature operation, MAT was
Alarm below alarm setpoint.
Damper Open Alarm is reset
Fail Alarm automatically.
Damper Close Alarm is reset
Fail Alarm automatically.
Smoke detector input
Smoke Alarm
signals smoke event.
Possible Cause Component to Check
Check the mixed air
The alarm is activated
temperature sensor
if the sensor is faulty, a
wiring.
sensor wire is loose or
Check temperature
an out-of-range value
vs. resistance of
is read.
temperature sensor.
Check the outdoor
The alarm is activated
temperature sensor
if the sensor is faulty, a
wiring.
sensor wire is loose or
Check temperature
an out-of-range value
vs. resistance of
is read.
temperature sensor.
The alarm is activated
if the sensor is faulty, a
Check the humidity
sensor wire is loose or
sensor wiring.
an out-of-range value
is read.
Check the return air
The alarm is activated
temperature sensor
if the sensor is faulty, a
wiring.
sensor wire is loose or
Check temperature
an out-of-range value
vs. resistance of
is read.
temperature sensor.
Damper
Bringing in warm air
from outside.
OAT sensor
Damper
Bringing in cool air
from outside.
OAT sensor
Check the damper
Free cooling damper linkage. Check to see
fails to open. if anything is in the
way of the damper.
Check the damper
Free cooling damper linkage. Check to see
fails to close. if anything is in the
way of the damper.
Smoke sensor fail. Smoke detector
Device
Recommended Action
Actions
Replace the supply
air temperature
sensor.
Replace the outdoor
temperature sensor.
Replace the humidity
sensor.
Replace the return air
temperature sensor.
Verify damper
operation.
Verify sensor
operation.
Verify damper
operation.
Verify sensor
operation.
Indoor Blower:
On
Damper: Off
Indoor Blower:
On
Damper: Off
Replace smoke
Unit disabled
detector
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