Carrier 19XRV specifications Unused State

Table 5 — ICVC Alarm Codes (cont)

CHILLER PROTECTIVE LIMIT FAULTS (cont)

ICVC FAULT	PRIMARY	SECONDARY	PRIMARY CAUSE	ADDITIONAL CAUSE/REMEDY
STATE	MESSAGE	MESSAGE
245	PROTECTIVE LIMIT	HIGH VFD SPEED	245→Actual VFD Speed	Actual VFD Speed on COMPRESS screen must
			exceeded limit of Target VFD	not exceed Target VFD Speed by more than
			Speed + 10%.	10%.
246	PROTECTIVE LIMIT	INVALID DIFFUSER	246→Diffuser Control Invalid	Check 25%, 50%, and 75% Guide Vane and Dif-
		CONFIG.	Configuration: Check SETUP2	fuser Load Point entries in SETUP2 screen.
			Entries.
247	PROTECTIVE LIMIT	DIFFUSER POSITION	247→Diffuser Position Fault:	Confirm that Diffuser Option in SETUP 2 screen
		FAULT	Check Guide Vane/Diffuser	has not been Enabled if compressor does not
			Actuator.	have a split ring diffuser. May indicate rotating
				stall condition.
				Check rotating stall transducer wiring accuracy
				and sealing.
				Check diffuser schedule and guide vane sched-
				ule in SETUP2 screen.
				Check for proper operation of diffuser and inlet
				guide vane actuators including inlet guide vane
				calibration.
				Check diffuser actuator coupling for rotational
				slip.
				Check RC snubber on CCM J4-23 and J4-24.
				Check 4.3k ohm resistor between CCM termi-
				nals J3-7 and J3-8.
				Check for electrical noise in CCM Diffuser Pres-
				sure wiring. Do not continue to operate com-
				pressor except for diagnostic purposes.
248	PROTECTIVE LIMIT	SPARE TEMPERATURE	248→Spare Temperature #1	Check Spare Temperature Enable and Spare
		#1	[VALUE] exceeded limit of	Temperature Limit in SETUP1 Screen.
			[LIMIT]*.
249	PROTECTIVE LIMIT	SPARE TEMPERATURE	249→Spare Temperature #2	Check Spare Temperature Enable and Spare
		#2	[VALUE] exceeded limit of	Temperature Limit in SETUP1 Screen.
			[LIMIT]*.
250	UNUSED	UNUSED	250→Unused State.
251	PROTECTIVE LIMIT	VFD CONFIG CONFLICT	251→VFD Config Conflict	The VFD_CONF table in the Gateway does not
			(VFD Uploaded): Verify to	match that which is in the ICVC. This is a normal
			Reset Alarm.	fault if an ICVC has been uploaded with soft-
				ware when it was not attached to the CCM.
				Enter VFD_CONF screen and then exit
				VFD_CONF screen by pressing EXIT then
				CANCEL. Re-enter the VFD_CONF screen,
				press EXIT then SAVE. Parameters stored in
				the Gateway will be uploaded into the ICVC.
				Confirm valid settings in VFD_CONF screen.
252	PROTECTIVE LIMIT	VFD CONFIG CONFLICT	252→VFD Config Conflict	The VFD_CONF table in the Gateway does not
			(VFD Downloaded): Verify to	match that which is in the ICVC.
			Reset Alarm.
253	PROTECTIVE LIMIT	GUIDE VANE	253→Guide Vane Fault	Enter CONTROL TEST and execute Guide
		CALIBRATION	[VALUE]. Check Calibration.	Vane Calibration.
				Check CCM guide vane feedback terminals J4-9
				and J4-10.
				Check guide vane feedback potentiometer.
				Alarm before start indicates guide vane opening
				is not less than 4%. Alarm running indicates
				guide vane position is < -1% or > 103%, or feed-
				back voltage is < .045 or > 3.15 VDC.
254	PROTECTIVE LIMIT	VFD CHECKSUM ERROR	254→Checksum Error:	Actual VFD checksum does not match calcu-
			Press Reset to Restore	lated value.
			Configuration.
255	PROTECTIVE LIMIT	VFD DEW PREVENTION	255→Dew Prevention - Cool-	VFD COLDPLATE TEMP is too close to dew
			ant Too Cold. Check Solenoid	point based on VFD ENCLOSURE TEMP and
			& Cond T.	RELATIVE HUMIDITY in POWER screen.
				Check for moisture in VFD enclosure.
				Check Humidity Sensor in CONTROLS TEST.
				Check for contamination on CCM J3-7 and J3-9
				Humidity Sensor.
				Check that VFD refrigerant cooling modulating
				valve is closing.
256	PROTECTIVE LIMIT	INDUCTOR OVERTEMP	256→Inductor Overtemp Trip -	Check for cooling fan air flow obstructions.
			Check Temp Switch and Cool-
			ing Fans.
257	PROTECTIVE LIMIT	VFD START INHIBIT	257→VFD Start Inhibit: Check	The VFD Start Inhibit is derived from the Alarm
			VFD Diagnostic Parameters	bit being set in the VFD. The conditions causing
			212/214.	the alarm must be corrected in the VFD to
				enable subsequent starts and operation. See
				VFD parameters 212/214.
258	UNUSED STATE	UNUSED	258→Unused.

*[LIMIT] is shown on the ICVC as the temperature, pressure, voltage, etc., set point predefined or selected by the operator as an override, alert, or alarm condition. [VALUE] is the actual pressure, temperature, voltage, etc., at which the control tripped.

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