Carrier 69NT40-511-199, 69NT40-521 manual Pre-Trip Mode, Pre-Trip Test Codes, Title Description

c. Auto Test Operation From Serial	d. Pre-Trip Test Results
Communications

Pre-trip may also be initiated via communications. The operation is the same as for the Auto Test mode described above except that should a test fail, the pre-trip mode will automatically terminate. When initiated via communications, a test may not be interrupted with an arrow key, but the pre-trip mode can be terminated with the PRE-TRIP key.

3.2.2Pre-Trip Mode

At the end of the pre-trip test selection menu, the message “P,” “rSLts” will be displayed. Pressing the ENTER key will allow the user to see the results for all subtests (i.e., 1-0, 1-1, etc). The results will be displayed as “PASS” or “FAIL” for all the tests run to completion since power up. If a test has not been run since power up, “--------” will be displayed.

		Table 3-5. Pre-Trip Test Codes
CODE	TITLE	DESCRIPTION
#
		NOTE

“Auto” or “Auto1” menu includes the following: P, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2’ (Optional)

menu includes the following: P, P1, P2, P3, P4, P5, P6,P7, P8, P9, P10 and rSLts. (Refer to section 3.2.1.)

		All lights and display segments will be energized for five seconds at the start of
P	Pre-Trip Initiated	the pre-trip. Since the unit cannot recognize lights and display failures, there are
		no test codes or results associated with this phase of pre-trip.
		Setup: Heater must start in the OFF condition, and then be turned on. A current
P1-0	Heaters Turned On	draw test is done after 15 seconds.
		Pass/Fail Criteria: Passes if change in current draw is within the range
		specified.
		Setup: Heater must start in the ON condition, and then be turned off. A current
P1-1	Heaters Turned Off	draw test is done after 10 seconds.
		Pass/Fail Criteria: Passes if change in current draw is within the range
		specified.
		Requirements: Water pressure switch (WP) input must be closed.
		Setup: Condenser fan is turned ON, a current draw test is done after 15
P2-0	Condenser Fan On	seconds.
		Pass/Fail Criteria: Passes if change in current draw test is within the range
		specified.
		Setup: Condenser fan is turned OFF, a current draw test is done after 10
P2-1	Condenser Fan Off	seconds.
		Pass/Fail Criteria: Passes if change in current draw test is within the range
		specified.
		Requirements: The unit must be equipped with a low speed evaporator fan, as
	Low Speed	determined by the Evaporator Fan speed select configuration variable.
P3		NOTE: If the unit is configured for single evaporator fan operation, Pre-Trip tests
	Evaporator Fans
		P3-0, P3-1, P4-0 and P4-1 will fail immediately if Controller alarm codes AL11 or
		AL12 are active at the start of testing.
		Setup: The high speed evaporator fans will be turned on for 10 seconds, then off
	Low Speed	for two seconds, then the low speed evaporator fans are turned on. A current
P3-0	Evaporator Fan	draw test is done after 60 seconds.
	Motors On	Pass/Fail Criteria: Passes if change in current draw is within the range
		specified. Fails if AL11 or AL12 activates during test.
	Low Speed	Setup: The low speed Evaporator Fan is turned off, a current draw test is done
		after 10 seconds.
P3-1	Evaporator Fan
		Pass/Fail Criteria: Passes if change in current draw is within the range
	Motors Off
		specified. Fails if AL11 or AL12 activates during test.
	High Speed	Setup: The high speed Evaporator Fan is turned on, a current draw test is done
		after 60 seconds.
P4-0	Evaporator Fan
		Pass/Fail Criteria: Passes if change in current draw is within the range
	Motors On
		specified. Fails if AL11 or AL12 activates during test.

SECTION 3

3-19 T-268-07