Sterling 30RA010-055 Service Test See — Both main power, Control Methods and Cooling Set Points

Table 8 — Control Methods and Cooling Set Points

	CONTROL	OCCUPANCY		COOLING SET POINT SELECT (CLSP)
	TYPE	STATE	0	1	2	3
	(CTRL)		(single)	(dual, switch)	(dual, occ)	(4 to 20 mA)
0	(switch)	Occupied	ON,CSP1	ON*	ON,CSP1	ON†
		Unoccupied	ON,CSP1	ON*	ON,CSP2	ON
2	(Occupancy)	Occupied	ON,CSP1	ON*	Illegal	ON†
		Unoccupied	OFF	OFF	Illegal	OFF
3	(SCN)	Occupied	ON,CSP1	ON*	ON,CSP1	ON†
		Unoccupied	ON,CSP1	ON*	ON,CSP2	ON†

*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.

†Cooling set point determined from 4 to 20 mA input to Energy Management Module (EMM) to terminals TB6-3,5.

HEATING OPERATION — The chiller can be used for pump outputs or optional factory-installed hydronic system operation can be utilized for heating applications. The heating mode is activated when the control sees a field-supplied closed switch input to terminal block TB5-7,8. The control locks out cooling when the heat relay input is seen. A field-supplied boiler relay connection is made using heat relay and alarm relay contacts. Factory-installed ‘BOILER’ connections exist in the control panel near TB5 for these applications. Alarms and alerts A189 through A202 are active during heating operation.

Marquee Display Usage (See Fig. 16 and Tables 8-27) — The Marquee display module provides the

user interface to the ComfortLink™ control system. The

display has up and down arrow keys, an ESCAPE key, and an

ENTER key. These keys are used to navigate through the

different levels of the display structure. See Table 9. Press the

ESCAPE key until the display is blank to move through the top 11 mode levels indicated by LEDs on the left side of the display.

Pressing the ESCAPE and ENTER keys simultaneously will scroll a clear language text description across the display indicating the full meaning of each display acronym. Pressing the ESCAPE and ENTER keys when the display is blank

(Mode LED level) will return the Marquee display to its default menu of rotating display items. In addition, the password will be disabled requiring that it be entered again before changes can be made to password protected items.

Clear language descriptions in English, Spanish, French, or Portuguese can be displayed when properly configuring the LANG Item in the Configuration Mode, under the Display (DISP) submode. See Table 17. Throughout this text, the loca- tion of items in the menu structure will be described in the fol- lowing format:

Item Expansion (ITEM) [Mode Name, Sub-mode Name] For example, using the language selection item: Language Selection (LANG) [Configuration, DISP]

MODE
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs	Alarm Status
Outputs	ESCAPE ENTER
Configuration
Time Clock
Operating Modes
Alarms

Fig. 16 — Scrolling Marquee Display

NOTE: When the LANG variable is changed to 1, 2, or 3, all appropriate display expansions will immediately change to the new language. No power-off or control reset is required when reconfiguring languages.

When a specific item is located, the display will flash show- ing the operator, the item, followed by the item value and then

followed by the item units (if any). Press the ENTER key to

stop the display at the item value. Items in the Configuration and Service Test modes are password protected. The display

will flash PASS and WORD when required. Use the ENTER

and arrow keys to enter the 4 digits of the password. The default password is 1111.

Changing item values or testing outputs is accomplished in the same manner. Locate and display the desired item. Press

ENTER to stop the display at the item value. Press the

ENTER key again so that the item value flashes. Use the

arrow keys to change the value or state of an item and press the

ENTER key to accept it. Press the ESCAPE key and the

item, value, or units display will resume. Repeat the process as required for other items.

See Tables 8-27 for further details.

Service Test (See Table 11) — Both main power

and control circuit power must be on.

The Service Test function should be used to verify proper operation of condenser fan(s), compressors, minimum load valve solenoid (if installed), cooler pump(s) and remote alarm relay. To use the Service Test mode, the Enable/Off/Remote Contact switch must be in the OFF position. Use the display keys and Table 11 to enter the mode and display TEST. Press

ENTER twice so that OFF flashes. Enter the password if

required. Use either arrow key to change the TEST value to the ON position and press ENTER . Press ESCAPE and the button to enter the OUTS or COMP sub-mode.

Test the condenser fans, cooler pump(s) and alarm relay by changing the item values from OFF to ON. These discrete outputs are then turned off if there is no keypad activity for 10 minutes. Test the compressor and minimum load valve solenoid (if installed) outputs in a similar manner. The minimum load valve solenoids will be turned off if there is no keypad activity for 10 minutes. Compressors will stay on until they are turned off by the operator. The Service Test mode will remain enabled for as long as there is one or more compressors running. All safeties are monitored during this test and will turn a compressor, circuit or the machine off if required. Any other mode or sub-mode can be accessed, viewed, or changed during the TEST mode. The STAT item [Run/Status, VIEW] will dis- play “0” as long as the Service mode is enabled. The TEST sub-mode value must be changed back to OFF before the chill- er can be switched to Enable or Remote contact for normal operation.

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