Installation Operation Maintenance

OperationPower-up initializationCAUTION! : Before proceedingwith any test procedure oroperation, make sure that crankcaseheaters have been energized for 8hours at least. All units areequipped with crankcase heaters.Note: Units are factory suppliedwith a smoke detector.A manual reset on the smokedetector device has to be done inorder to start the unit.Idle status: Green LED ONDetection status: Green LED OFFThe "initialization" by the UCPoccurs each time the system ispowered-up. The UCP performsinternal self-diagnostics checks,which include identifying theequipment components of itssystem, and the configuring of itselfto that system. It also checks itselfto be sure it is functioning correctly.On units with the optionaleconomizer, the damper is drivenopen for 15 to 20 seconds and thenfully closed. The UCP systemindicator LED is turned to "ON"within one second of start-up ifoperation is correct.Test mode procedure at the UCPcontrol boardOperating the unit from the roofusing the test mode at the UCPcontrol board.CAUTION! : Before proceedingwith the following test procedures,make sure that thermostat or zonesensor is off.WARNING! : When operating theunit in test mode, the evaporatoraccess panel and the control boxcover must be closed. Failure toensure that the evaporator accesspanel and control box cover is inplace could result in severepersonal injury or death.The Unitary Control Processor(UCP) has a red indicator light in thelower left corner. When power isapplied to the unit, the light willglow if the UCP is functioningcorrectly. If the system is placed intest mode the light will blinkcontinuously.Note: The control box cover has asmall peephole, located in the lowerleft-hand corner. The red indicatorlight on the UCP can be seenthrough this peephole. Do notremove the control box cover whilethe unit power is connected.The microelectronic control (UCP)provides compressor anti shortcycle timing functions throughminimum "Off" and "On" timing toincrease reliability, performance andto maximize unit efficiency. Uponpower initialization, the UCPperforms self-diagnostic checks toinsure that all internal controls arefunctioning. It checks theconfiguration parameters againstthe components connected to thesystem. When units are equippedwith an optional economizer, theUCP drives the economizerdampers toward the open positionfor 15 to 20 seconds then closes.The economizer is closed forapproximately 90 seconds to ensureproper damper calibration.The LED located on the UCP moduleis turned "On" within one secondafter power-up if all internaloperations are good.42RT-SVX16C-E4