Data Aire dap4 User Manual page 105

Alarm Screen Description &
Classification
Discharge Air Discharge air
Low Temp temperature is
below alarm
set point
*Warning
Return Air Low Return Air
Temp Temperature is
below alarm
set point limit
*Warning
Possible Causes
•
Incorrect settings on
the controller
•
Supply air temperature
is below set point
•
Dehumidification set to
low or Fan Speed
Assist setting may be
running fan too slow.
•
Not enough heat load
•
Faulty Sensor
•
Loose Connection
•
Out of calibration
•
Reheat Coils are not
working correctly
during
dehumidification mode
•
Incorrect settings on
the controller
•
Return air temperature
is too low
•
Not enough heat load
•
Faulty Sensor
•
Loose Connection
•
Out of calibration
105
Corrective Actions
•
Replace tank if necessary
•
Go to Menu L- Configure I/O and
change the Humidifier Fault
Switch action setting
•
Adjust the Discharge Air alarm
limit set points (range 45º-60º).
•
Increase Dehum setpoint, Lower
Dehum Fan Speed Assist
setting.
•
Increase heat load
•
Check discharge air temp sensor
against the Temperature Sensor
Chart to verify resistance of
sensor
•
Check connection, cable and
correct connection points
•
Calibrate sensor
•
Check Reheat coil operations
•
Go To Factory Settings in Menu
J scroll down to Reheat Settings
and enter the correct information
•
Increase Temperature set point
or adjust the low Return Air
alarm set point lower (range 55º-
75º)
•
Increase heat load
•
Use Temperature Sensor Chart
to verify resistance of the sensor
•
Check Connection, cable and
correct connection points
•
Calibrate sensor