Data Aire dap4 - Alarms Overview; Air Flow and Water Flow Alarms

118
Alarm Screen
Description &
Classification
Possible Causes
Corrective Actions
C1 or C2 Low
Pressure
Circuit
pressure is
under 50 PSI
(it will cut- in at
90 PSI)
** Urgent
• Not enough air flow
though evaporator coil
• Low Indoor
Temperature
• Dirty Filters
• Low refrigerant charge
• Inoperative Expansion
valve
• Filter Drier clogged up
• Restricted liquid line
• Undersized lines
• Inefficient Compressor
• Incorrect settings of
digital input on the
controller
• Blower motor on low speed or
failed motor, High static
pressure, or undersized plenums
• Raise the temperature above
68° degrees
• Replace filters
• Check sub-cooling, and test for
leaks. Repair leaks and add
refrigerant
• Adjust and check valve
operation and replace if needed
• Replace filter drier
• Repair restriction
• Check line design at IOM
• Test compressor efficiency
• Go to Menu L – Configure I/O
and change the Low-Pressure
Switch action setting
C1 or C2 High
Pressure
Circuit
pressure is
over the
pressure
setting of the
switch
** Urgent
• High outdoor ambient
temperature
• Recirculating of
condensing air
• Low heat rejection at
condenser
• Not enough air across
Condenser coil
• Excessive Airflow
across the evaporator
coil
• Heavy Load
• Wait until ambient temperature
drops
• Remove obstruction to air flow
• Check condenser fan motor
operations on air cooled, check
water flow on water cooled.
• Check condenser fan cut-in
temperatures, and clean
condenser coil if needed
• Check blower speed