Carrier 69NT40-511-199, 69NT40-521 manual General Layout of the Controller Section, KEY Function

3.1.3General Layout of the Controller Section

The Micro-Link 2i Controller/DataCORDER consists of a key pad, display module and Controller module. Connectors are used to attach the wiring of the unit to the Controller module. The Controller module is designed to permit ease of installation and removal.

All control functions are accessed by key pad selections and viewed on the display module which are designed for optimum user friendliness and convenience.

The key pad (see Figure 3-1) is mounted on the right-hand side of the control box. The key pad consists of eleven push-energized membrane switches that act as the user’s interface with the Controller and the optional DataCORDER. Refer to Table 3-2.

CODE PRE

SELECT TRIP

ALARM DEFROST

LIST INTERVAL

ENTER

RETURN _C

SUPPLY _F

BATTERY ALT.

POWER MODE

Figure 3-1. Key Pad

Table 3-2. Key Pad Function

KEY			FUNCTION
	Change set point upward. Change
	codes upward. Scan alarm list upward.
	Change	user		selectable				features
Arrow Up	upward.	Pre-trip			advance			forward.
	Pre-trip test interruption. DataCORDER
	Function and Alarm Codes are scrolled
	upward after the ALT. MODE key is
	depressed.
	Change set point downward. Change
	codes downward.				Scan		alarm		list
Arrow Down	downward.		Change			user	selectable
	features downward. Pre-trip repeat
	backward. DataCORDER Function and
	Alarm Codes are scrolled downward
	after the ALT. MODE key is depressed.
Return/Sup	Displays		non-controlling					probe
ply	temperature (momentary display).
_C/_F	Displays alternate temperature scale
	(momentary display).
	Displays alarm list and clearing of the
	alarm queue (when followed by Enter
Alarm List	key) for the Controller, and also for the
	DataCORDER after the ALT. MODE
	key is depressed.
	Access function codes (see arrow up
Code Select	and arrow down) for the Controller,
	and also for the DataCORDER after
	the ALT. MODE key is depressed.
Defrost	Displays selected defrost interval.
Interval
Pre–Trip	Displays	a	pre-trip			selection		menu.
	Discontinues pre-trip in progress.
	If the unit is equipped with the optional
Battery	battery	pack,		initiate the				battery
	backup mode to allow set point and
Power
	function code selection if no mains
	power is present.
	Entering a set point change.
	Extending to 30 seconds the time a
	chosen data function code is
Enter	displayed. Entering the value of a user
	selectable mode. Clearing the alarm
	list and initiating pre-trip. Also used for
	various DataCORDER functions after
	the ALT. MODE key is depressed.
	Allows	access			to	DataCORDER
ALT. Mode	function		codes,			alarm		codes,
	DataCORDER			configuration					and
	scrollback.

T-268-07 3-4