Carrier 69NT20-531-300 manual Display Only Functions

		Table 3-5 Controller Function Codes (Sheet 1 of 3)
Code	TITLE		DESCRIPTION
No.
	Note: If the function is not applicable, the display will read “-- -- -- -- -- ”
			Display Only Functions
	Suction Modulation		Displays the SMV percent open. The right display reads 100% when the valve is
Cd01			fully open. The valve will usually be at 10% on start up of the unit except in very
	Valve Opening (%)		high ambient temperatures.
Cd02	Not Applicable		Not used
	Compressor Motor		The current sensor measures current draw in lines L1 & L2 by all of the high
Cd03			voltage components. It also measures current draw in compressor motor leg T3.
	Current		The compressor leg T3 current is displayed.
Cd04	Line Current,		The current sensor measures current on two legs. The third unmeasured leg is cal-
			culated based on a current algorithm. The current measured is used for control
	Phase A
			and diagnostic purposes. For control processing, the highest of the Phase A and B
Cd05	Line Current,		current values is used for current limiting purposes. For diagnostic processing,
			the current draws are used to monitor component energization.. Whenever a heat-
	Phase B
			er or a motor is turned ON or OFF, the current draw increase/reduction for that
Cd06	Line Current,		activity is measured. The current draw is then tested to determine if it falls within
			the expected range of values for the component. Failure of this test will result in a
	Phase C
			pre-trip failure or a control alarm indication.
Cd07	Main Power Voltage		The main supply voltage is displayed.
Cd08	Main Power Fre-		The value of the main power frequency is displayed in Hertz. The frequency dis-
	quency		played will be halved if either fuse F1 or F2 is bad (alarm code AL21).
Cd09	Ambient Tempera-		The ambient sensor reading is displayed.
	ture
Cd10	Compressor Suction		Compressor suction temperature sensor reading is displayed.
	Temperature
Cd11	Compressor Dis-		Compressor discharge temperature sensor reading is displayed.
	charge Temperature
Cd12	Compressor Suction		Compressor suction pressure transducer reading is displayed.
	Pressure
Cd13	Not Applicable		Not used
Cd14	Compressor Dis-		Compressor discharge pressure transducer reading is displayed.
	charge Pressure
Cd15	Unloader Valve		The status of the valve is displayed (Open - Closed).
Cd16	Compressor Motor		Records total hours of compressor run time. Total hours are recorded in incre-
	Hour Meter		ments of 10 hours (i.e., 3000 hours is displayed as 300).
Cd17	Relative Humidity		Humidity sensor reading is displayed. This code displays the relative humidity, as
	(%)		a percent value.
Cd18	Software Revision #		The software revision number is displayed.
			This code checks the Controller/DataCORDER battery pack. While the test is
			running, “btest” will flash on the right display, followed by the result. “PASS”
			will be displayed for battery voltages greater than 7.0 volts. “FAIL” will be dis-
Cd19	Battery Check		played for battery voltages between 4.5 and 7.0 volts, and “----------” will be
			displayed for battery voltages less than 4.5 volts. After the result is displayed for
			four seconds, “btest” will again be displayed, and the user may continue to scroll
			through the various codes.
Cd20	Config/Model #		This code indicates the dash number of the model for which the Controller is con-
			figured (i.e., if the unit is a 69NT40-531-100, the display will show “31100”).
Cd21	Economizer Valve		The status of the valve is displayed (Open - Closed).

T-309 3-14