Carrier 30RAP010-060 Advanced Scroll Temperature Protection Label, 30RAP Unit Cutout CUT-IN Size

High-Pressure Switch Trip — The high pressure switch has opened. Below are the factory settings for the fixed high pres- sure switch.

30RAP UNIT	CUTOUT			CUT-IN
SIZE	psig	kPa	psig		kPa
010-060	650	4482	500		3447

ASTP Protection Trip — All non-digital Copeland compres- sors are equipped with an advanced scroll temperature protec- tion (ASTP). A label located above the terminal box identifies models that contain this technology. See Fig. 34.

Fig. 34 — Advanced Scroll Temperature

Protection Label

Advanced scroll temperature protection is a form of inter- nal discharge temperature protection that unloads the scroll compressor when the internal temperature reaches approxi- mately 300 F. At this temperature, an internal bi-metal disk valve opens and causes the scroll elements to separate, which stops compression. Suction and discharge pressures balance while the motor continues to run. The longer the compressor runs unloaded, the longer it must cool before the bi-metal disk resets. See Fig. 35 for approximate reset times.

To manually reset ASTP, the compressor should be stopped and allowed to cool. If the compressor is not stopped, the motor will run until the motor protector trips, which occurs up to 90 minutes later. Advanced scroll temperature protection will

reset automatically before the motor protector resets, which may take up to 2 hours.

High Discharge Gas Temperature Protection — Units equipped with digital compressors have an additional thermis- tor located on the discharge line, If discharge temperature ex- ceeds 265 F (129.4 C), the digital compressor will be shut off.

Alarms will also occur if the current sensor board malfunc- tions or is not properly connected to its assigned digital input. If the compressor is commanded OFF and the current sensor reads ON, an alert is generated. This will indicate that a com- pressor contactor has failed closed. In this case, a special mode, Compressor Stuck on Control, will be enabled and all other compressors will be turned off. An alarm will then be enabled to indicate that service is required. Outdoor fans will continue to operate. The first outdoor fan stage is turned on immediately. The other stages of fan will be turned on as required by SCT.

Alarms and Alerts — These are warnings of abnormal or fault conditions, and may cause either one circuit or the whole unit to shut down. They are assigned code numbers as described in Table 42.

Automatic alarms will reset without operator intervention if the condition corrects itself. The following method must be used to reset manual alarms:

Before resetting any alarm, first determine the cause of the alarm and correct it. Enter the Alarms mode indicated by the LED on the side of the scrolling marquee display. Press

ENTER and until the sub-menu item RCRN “RESET ALL CURRENT ALARMS” is displayed. Press ENTER . The control will prompt the user for a password, by displaying PASS and WORD. Press ENTER to display the default pass- word, 1111. Press ENTER for each character. If the password has been changed, use the arrow keys to change each individu- al character. Toggle the display to “YES” and press ENTER . The alarms will be reset.

		120
		110
Time		100
		90
Recommended Cooling
	(Minutes)	80
		70
		60
		50
		40
		30
		20
		10
		0
		0	10	20	30	40	50	60	70	80	90
				Compressor Unloaded Run Time (Minutes)

*Times are approximate.

NOTE: Various factors, including high humidity, high ambient temperature, and the presence of a sound blanket will increase cool-down times.

Fig. 35 — Recommended Minimum Cool Down Time After Compressor is Stopped*

65