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Carrier 30GN040-420 operating instructions Ð Keypad Directory cont SET POINT

Models: 30GN040-420

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Table 9 Ð Keypad Directory (cont)

Table 9 Ð Keypad Directory (cont)

SET POINT

To read a set point, go to proper subfunction and read desired set point. To change a set point, enter new set point value, then press				.
LOCAL/ENABLE-STOP-CCN switch must be in LOCAL/ENABLE or STOP position.

SUBFUNCTION	KEYPAD ENTRY	DISPLAY	COMMENT

1 SET POINTS		SET POINT	Unit Set Point
		CSP1 X	Chiller Fluid Set Point 1 (F)
		CSP2 X	Chiller Fluid Set Point 2 (F)
		HSPA X	Head Pressure Set Point Circuit A (F)
		HSPB X	Head Pressure Set Point Circuit B (F)
		CRAMP X	Cooling Ramp Loading Rate (F)

2 RESET SET POINTS		RESET	Reset Set Points
		CRT1 X	Cooling reset at 20 mA (F)
		CRT2N X	Reference Temperature at No Reset (F)
		CRT2F X	Reference Temperature at Full Reset (F)
		CRT2D X	Total Degrees of Reset (F)
		CRT3N X	Chiller Fluid DT at No Reset (F)
		CRT3F X	Chiller Fluid DT at Full Reset (F)
		CRT3D X	Total Degrees of Reset (F)

3 DEMAND SET POINTS		DEMAND	Demand Set Points
		DLS1 X²	Demand Switch 1 Set Point (percent)
		DLS2 X²	Demand Switch 2 Set Point (percent)
		DL20 X	Demand Limit at 20 mA (percent)
		DLGN X	Loadshed Group Number
		LSDD X	Loadshed Demand (percent)
		TIME X	Minimum Loadshed Time (minutes)

4 DATE AND TIME		DATE.TIME	Date, Time and Day of Week
		DOW.HR.MIN	Day 1 = Mon, 2 = Tues. . .7 = Sun
			Hours are displayed in 24-hr time. Decimal point serves as colon.
		MM.DD.YR	Month.Day.Year. When entering date, enter a decimal
			point between entries. Each entry must be two numbers.

5 LEAVING CHILLER		LMT X	Leaving Chiller Fluid Alert Limit (F)
FLUID ALERT LIMIT		LMT X	Leaving Chiller Fluid Alert Limit (F)
FLUID ALERT LIMIT

LEGEND

CCN Ð Carrier Comfort Network

EXV Ð Electronic Expansion Valve

MOP Ð Maximum Operating Pressure

*Will read ALARM or ALERT as appropriate. ²Must be con®gured.

**If applicable.

²²Not manually resettable.

NOTE: If metric option is selected under , temperature expressed as Celsius and pressure will be expressed as kPa.

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Carrier 30GN040-420 operating instructions Ð Keypad Directory cont SET POINT

Contents

Keypad and Display Module Controls, Operation, and TroubleshootingACCESSORY UNLOADER INSTALLATION 30GN040-420Table 1 Ð Unit Sizes and Modular Combinations SAFETY CONSIDERATIONSGENERAL MAJOR SYSTEM COMPONENTSTB Ð Terminal Block Fig. 1 Ð 30GN Control Panel 040-110Unit ShownLEGEND CCN Ð Carrier Comfort Network Keypad and Display Module Also Called HSIO Table 3 Ð Thermistor and Transducer Locations Fig. 3 Ð Compressor Ground Fault ModuleCompressor Protection Control Module CPCS OPERATION DATATable 4A Ð Capacity Control Steps Table 4A Ð Capacity Control Steps, 040-070cont Table 4A Ð Capacity Control Steps, 040-070cont LOADING SEQUENCE A LOADING SEQUENCE A LOADING SEQUENCE A UNIT LOADING SEQUENCE A LOADING SEQUENCE A A1*,B1 LOADING SEQUENCE A A1,kB1 LOADING SEQUENCE A LOADING SEQUENCE A LOADING SEQUENCE A LOADING SEQUENCE A LOADING SEQUENCE A LOADING SEQUENCE A Fig. 4 Ð Keypad and Display Module Head Pressure ControlPumpout Keypad and Display Module Also Called HSIOTable 5 Ð Condenser Fan Sequence Table 7 Ð Functions and Subfunctions Table 6 Ð Keypad and Display Module UsageTable 9 Ð Keypad Directory STATUS Table 8 Ð Accessing Functions and SubfunctionsKEYPAD ENTRY 6 TEMPERATURETable 9 Ð Keypad Directory cont STATUS cont SUBFUNCTIONDISPLAY Table 9 Ð Keypad Directory cont STATUS contSUBFUNCTION KEYPAD ENTRYTEST Table 9 Ð Keypad Directory cont STATUS contSCHEDULE Table 9 Ð Keypad Directory cont TEST contTable 9 Ð Keypad Directory cont SCHEDULE cont SERVICETable 9 Ð Keypad Directory cont SERVICE cont KEYPAD ENTRY 3 ALARM/ALERTTable 9 Ð Keypad Directory cont HISTORY SUBFUNCTIONTable 9 Ð Keypad Directory cont SET POINT Example 2 Ð Reading Current Operating Modes Example 1 Ð Reading Alarm CodesTable 10 Ð Operational and Mode Display Codes Pulldown Set Point Example 3 Ð Using Test FunctionReset Set Points Chilled Fluid Set PointChilled Fluid Set Point Example 5A Ð External ResetTable 11 Ð Reset Amounts Example 4 Ð Reading and ChangingExample 5B Ð 4 to 20 mA and Internally or Externally Powered ResetExample 5C Ð Using Return Fluid Temperature Reset Fig. 5 Ð Cooling Return Fluid ResetCOMM Ð Communications Bus Fig. 6 Ð Cooling External Temperature ResetÐ Power Ð SwitchExternally powered Fig. 8 Ð 4-20mA Cooling Temperature ResetExample 6 Ð Changing Reset Type Table 12 Ð Service FunctionsFirst Log On As Shown in Table To Disable Demand LimitExample 7B Ð Using Demand Limit 4-20mA Example 8 Ð Setting Time of Day and Day of WeekFig. 9 Ð 4-20mA Demand Limiting and press while on the correct conguration Table 14 Ð Adjustable Field CongurationsTable 13 Ð Factory Conguration Keystrokes To change a conguration enter the new congurationExample 9 Ð Using the Schedule Function cont Example 9 Ð Using the Schedule FunctionFig. 10 Ð Sample Time Schedule TROUBLESHOOTINGExample 10 Ð Holiday Schedule Function Cooling load satised Table 16 Ð Alarm and Alert Codes Table 16 Ð Alarm and Alert Codes cont Fig. 11A Ð 24-VSafety Circuit Wiring Code 30 Reset input failure 4 to 20 mA alert Loss of communication can be attributed to a grounded transformer with a secondary voltage of 21 vac supplying the PSIO, DSIO-LV,or 4 IN/4 OUT the 12.5-vactrans- former supplying the DSIO-EXVmodule, or the 24-vactrans- former supplying PS1 for the transformers. These transformers should not be grounded, or serious damage to controls can result. Check to be sure the transformers are not grounded Code 42 Cooler freeze protection alarm Fig. 12 Ð Electronic Expansion Valve EXV Electronic Expansion Valve EXVModule, DSIO EXV Fig. 13 Ð EXV Cable Connections to EXV Driver6.Check operation of EXV TEMPERATURE TEMPERATURE 1.Disconnect transducer from the system Fig. 15 Ð Thermistor Locations FLUID-SIDETEMPERATURE THERMISTOR T2COMPRESSOR SUCTION GAS TEMPERATURE ALL UNITS AND FLUID-SIDETEMPERATURETRANSDUCER REPLACEMENT Control Modules Fig. 21 Ð Low-VoltageRelay Module DSIO ACCESSORY UNLOADER INSTALLATIONFig. 19 Ð Sensor Bus Wiring Communications Fig. 20 Ð Processor Module PSIOFig. 22 Ð 4 In/4 Out Module SIO InstallationTable 20 Ð Standard and Accessory Unloaders Table 19 Ð TroubleshootingThe keypad LCD will display 3.Wire in the solenoid valvespad display reads OUTPUTS. Press until display PressSee Table Externally Powered Switch InputsFig. 26 − Demand Limit Ð 4-20mA Signal Fig. 30 Ð Remote Reset from 4-20mA SignalFig. 35 Ð Interlocks InstallationFig. 34 Ð Remote Alarm REPLACING DEFECTIVE PROCESSOR MODULEPage Copyright 1995 Carrier Corporation