Specifications

39InRow RC Operation and Maintenance
Water carryover • Improper fan speed selected • Select the next highest fan speed setting. For
example, change the fan speed setting from Low
to Med/Low.
• Inlet water temperature is too
low
• Verify that the temperature of the inlet water is
within the specified range.
• Room humidity is too high • Adjust setpoint on dehumidifying equipment.
• Add additional dehumidifying equipment.
• Dirty coil • Clean the coil.
• Dirty filter • Clean the air filter.
Cooling unit sound
is louder than
expected
• Improper fan speed selected • Select a lower fan speed.
• Incorrect placement of
remote temperature sensor
• Verify that the remote temperature sensor is
properly located in the cold aisle.
Temperature control
not tight enough
• Improper placement of
remote temperature sensor
• Verify that the remote temperature sensor is
properly located in the cold aisle.
• Improper PID tuning • APC Customer Support at a number on the back
cover of this manual.
Water on outside of
cooling unit
• Condensate drain hose is not
connected or not properly
routed outside the Cooling
Unit
• Verify that the condensate drain hose is properly
connected to the pump and properly routed
outside of the cooling unit.
• Verify that the condensate drain line does not
exceed 12 feet lift and 30 feet horizontal run.
• Leak in piping system • Locate and repair the leak.
• Cooling unit not leveled
properly
• Adjust the leveling feet of the cooling unit.
• Damaged piping insulation • Identify damaged area and repair the insulation.
Water valve not
responsive
• Actuator not connected
properly
• Verify that the actuator is connected properly.
• Actuator and shaft not
rotating together
• Tighten the linkage screw on the actuator shaft.
• Rotary switch on the bottom
of the actuator is set
incorrectly
• Confirm that the rotary switch is pointing toward
the front of the cooling unit.
Display interface
not operational but
cooling unit
operates
• Display interface not
connected properly
• Verify that the display interface cable is connected
properly.
Incorrect air
pressure
• False filter clogs • Verify that the ends of the clear plastic air tubes
are not obstructed.
• Verify that the clear plastic air tubes are connected
to the controller.
• Verify that the clear plastic air tubes are not
pinched.
Problem Possible Cause Corrective Action