Carrier 50KC04-06 Service And Maintenance Instructions

18CONVENIENCE OUTLETSTwo types of convenience outlets are offered on 50KC models:non-powered and unit-powered. Both types provide a 125-vGFCI (ground-fault circuit-interrupter) duplex receptacle ratedat 15-A behind a hinged waterproof access cover, located onthe end panel of the unit. See Fig. 21.Fig. 21 — Convenience Outlet LocationNon-Powered TypeThis type requires the field installation of a general-purpose125-v 15-A circuit powered from a source elsewhere in thebuilding. Observe national and local codes when selecting wiresize, fuse or breaker requirements and disconnect switch sizeand location. Route 125-v power supply conductors into thebottom of the utility box containing the duplex receptacle.Unit-Powered TypeA unit-mounted transformer is factory-installed to stepdownthe main power supply voltage to the unit to 115-v at the du-plex receptacle. This option also includes a manual switch withfuse, located in a utility box and mounted on a bracket behindthe convenience outlet; access is through the unit’s control boxaccess panel. See Fig. 21.The primary leads to the convenience outlet transformer arenot factory-connected. Selection of primary power source is acustomer option. If local codes permit, the transformer primaryleads can be connected at the line-side terminals on a unit-mounted non-fused disconnect or HACR breaker switch; thiswill provide service power to the unit when the unit disconnectswitch or HACR switch is open. Other connection methodswill result in the convenience outlet circuit being de-energizedwhen the unit disconnect or HACR switch is open. See Fig. 22.Fig. 22 — Powered Convenience Outlet WiringHead pressure too lowLow refrigerant charge. Check for leaks; repair and recharge.Compressor valves leaking. Replace compressor.Restriction in liquid tube. Remove restriction.Excessive suction pressureHigh head load. Check for source and eliminate.Compressor valves leaking. Replace compressor.Refrigerant overcharged. Recover excess refrigerant.Suction pressure too lowDirty air filter. Replace filter.Low refrigerant charge. Check for leaks; repair and recharge.Metering device or low side restricted. Remove source of restriction.Insufficient evaporator airflow. Increase air quantity. Check filter and replace ifnecessary.Temperature too low in conditioned area. Reset thermostat.Outdoor ambient below 25°F Install low-ambient kit.Evaporator fan will not shut off Time off delay not finished. Wait for 30-second off delay.Compressor makes excessive noise Compressor rotating in wrong direction. Reverse the 3-phase power leads.Table 1 — Cooling Service Analysis (cont)PROBLEM CAUSE REMEDYWARNINGELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personal injuryor death.Units with convenience outlet circuits may use multipledisconnects. Check convenience outlet for power status beforeopening unit for service. Locate its disconnect switch, ifappropriate, and open it. Tag-out and lock this switch.CONVENIENCEOUTLET GFCIPWD-CO FUSESWITCHPWD-CO TRANSFORMERCONTROL BOXACCESS PANEL UNITVOLTAGECONNECTASPRIMARYCONNECTIONSTRANSFORMERTERMINALS208, 230 240 L1: RED +YELL2: BLU + GRA H1 + H3H2 + H4460 480L1: REDSplice BLU + YELL2: GRAH1H2 + H3H4575 600 L1: REDL2: GRAH1H2