Carrier 30RAP010-060 specifications Operating Modes, Mode Item Expansion Description

		Table 14 — Operating Modes
MODE	ITEM EXPANSION	DESCRIPTION
NO.
01	CSM CONTROLLING CHILLER	Chillervisor System Manager (CSM) is controlling the chiller.
02	WSM CONTROLLING CHILLER	Water System Manager (WSM) is controlling the chiller.
03	MASTER/SLAVE CONTROL	Dual Chiller control is enabled.
	RAMP LOAD LIMITED	Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature
05		is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling
		Ramp Loading (Configuration→SLCT→CRMP). The pull-down limit can be modified, if
		desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.
06	TIMED OVERRIDE IN EFFECT	Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed
		schedule, forcing unit to Occupied mode. Override can be implemented with unit under
		Local (Enable) or CCN (Carrier Comfort Network®) control. Override expires after each use.
	LOW COOLER SUCTION TEMPA	Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Sat-
		urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If
		the saturated suction temperature is less than the Brine Freeze Point (Set Points→FRZ
07		→BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F
		(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the satu-
		rated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for
		90 seconds, a stage of capacity will be removed from the circuit. The control will continue to
		decrease capacity as long as either condition exists.
	LOW COOLER SUCTION TEMPB	Circuit B cooler Freeze Protection mode. At least one compressor must be on, and the Sat-
		urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If
		the saturated suction temperature is less than the Brine Freeze Point (Set Points→FRZ
08		→BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F
		(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the satu-
		rated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for
		90 seconds, a stage of capacity will be removed from the circuit. The control will continue to
		decrease capacity as long as either condition exists.
09	SLOW CHANGE OVERRIDE	Slow change override is in effect. The leaving fluid temperature is close to and moving
		towards the control point.
10	MINIMUM OFF TIME ACTIVE	Chiller is being held off by Minutes Off Time (Configuration→OPT2→DELY).
	DUAL SETPOINT	Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set Points→COOL
13		→CSP.1) during occupied periods and Cooling Set Point 2 (Set Points →COOL→CSP.2)
		during unoccupied periods.
	TEMPERATURE RESET	Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leav-
14		ing fluid set point upward and is currently controlling to the modified set point. The set point
		can be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to
		20 mA signal.
	DEMAND/SOUND LIMITED	Demand limit is in effect. This indicates that the capacity of the chiller is being limited by
15		demand limit control option. Because of this limitation, the chiller may not be able to pro-
		duce the desired leaving fluid temperature. Demand limit can be controlled by switch inputs
		or a 4 to 20 mA signal.
16	COOLER FREEZE PROTECTION	Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section
		for definition). The chiller will be shut down when either fluid temperature falls below the
		Freeze point.
17	LOW TEMPERATURE COOLING	Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and
		decreasing faster than -0.5° F per minute. Error between leaving fluid and control point
		exceeds fixed amount. Control will automatically unload the chiller if necessary.
18	HIGH TEMPERATURE COOLING	Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing.
		Error between leaving fluid and control point exceeds fixed amount. Control will automatically
		load the chiller if necessary to better match the increasing load.
19	MAKING ICE	Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set Points →COOL
		→CSP.3) to make ice. The ice done input to the Energy Management Module (EMM) is open.
20	STORING ICE	Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set Points →COOL
		→CSP.2). The ice done input to the Energy Management Module (EMM) is closed.
	HIGH SCT CIRCUIT A	Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than
21		the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity
		may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con-
		densing temperature.
	HIGH SCT CIRCUIT B	Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than
22		the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity
		may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con-
		densing temperature.
23	MINIMUM COMP ON TIME	Cooling load may be satisfied, however control continues to operate compressor to ensure
		proper oil return. May be an indication of oversized application, low fluid flow rate or low loop
		volume.
	PUMP OFF DELAY TIME	Cooling load is satisfied, however cooler pump continues to run for the number of minutes set
24		by the configuration variable Cooler Pump Shutdown Delay (Configuration→OPT1
		→PM.DY).
25	LOW SOUND MODE	Chiller operates at higher condensing temperature and/or reduced capacity to minimize
		overall unit noise during evening/night hours (Configuration→OPT2→LS.MD).

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