Table 4-7 Controller Pre-Trip Test Codes - Carrier 69NT40-541-001 Operation And Service

CODE # TITLE
"Auto" or "Auto1" menu includes the: P, P1, P2, P3, P4, P5, P6 and rSLts. "Auto2" menu
includes P, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts."Auto3 menu includes P, P1, P2, P3,
P4, P5, P6, P7, P8 and rSLts
P Pre-Trip Initiated
P1-0 Heaters Turned On
P1-1 Heaters Turned Off
P2-0 Condenser Fan On
P2-1 Condenser Fan Off
Low Speed Evaporator
P3
Fans
Low Speed Evaporator
P3-0
Fan Motors On
Low Speed Evaporator
P3-1
Fan Motors Off
High Speed Evaporator
P4-0
Fan Motors On
High Speed Evaporator
P4-1
Fan Motors Off
Table 4–7 Controller Pre-Trip Test Codes
NOTE
All lights and display segments will be energized for five seconds at the start
of 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 draw test is done after 15 seconds.
Pass/Fail Criteria: Passes if current draw change is within the range
specified.
Setup: Heater must start in the ON condition, and then be turned off. A
current draw test is done after 10 seconds.
Pass/Fail Criteria: Passes if current draw change 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
seconds.
Pass/Fail Criteria: Passes if current draw change is within the range
specified.
Setup: Condenser fan is turned OFF, a current draw test is done after 10
seconds.
Pass/Fail Criteria: Passes if current draw change is within the range
specified.
Requirements: The unit must be equipped with a low speed evaporator fan,
as determined by the Evaporator Fan speed select configuration variable.
If the unit is configured for single evaporator fan operation, Pre-Trip tests
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 for two seconds, then the low speed evaporator fans are turned
on. A current draw test is done after 60 seconds.
Pass/Fail Criteria: Passes if change in current draw is within the range
specified. Fails if AL11 or AL12 activates during test.
Setup: The low speed Evaporator Fan is turned off, a current draw test is
done after 10 seconds.
Pass/Fail Criteria: Passes if change in current draw is within the range
specified. Fails if AL11 or AL12 activates during test.
Setup: The high speed Evaporator Fan is turned on, a current draw test
is done after 60 seconds.
Pass/Fail Criteria: Passes if change in current draw is within the range
specified. Fails if AL11 or AL12 activates during test.
Setup: The high speed Evaporator Fan is turned off, a current draw test
is done after 10 seconds.
Pass/Fail Criteria: Passes if change in current draw is within the range
specified. Fails if AL11 or AL12 activates during test.
4–27
DESCRIPTION
T-316