Table 3-7 Controller Pre-Trip Test Codes - Carrier Streamline Scroll 69NT20-531-300 Operation & Service Manual

Code
TITLE
No.
"Auto" or "Auto1" menu includes the: P0, P1, P2, P3, P4, P5, P6 and rSLts. "Auto2" menu
includes P0, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts.
P0- -0 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 Evapora-
P3
tor Fans
Low Speed Evapora-
P3-0
tor Fan Motors On
Low Speed Evapora-
P3-1
tor Fan Motors Off
High Speed Evapo-
P4-0
rator Fan Motors On
High Speed Evapo-
P4-1
rator Fan Motors Off
P5-0 Supply/Return Probe
Test
Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 of 4)
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 or condenser fan switch 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 sec-
onds.
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.
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 speci-
fied. 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 speci-
fied. 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 speci-
fied. 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 speci-
fied. Fails if AL11 or AL12 activates during test.
Setup: The High Speed Evaporator Fan is turned on and run for eight minutes,
with all other outputs de-energized.
Pass/Fail Criteria: A temperature comparison is made between the return and
supply probes.
If this test fails, "P5-0" and "FAIL" will be displayed. If both Probe tests
(this test and the PRIMARY/ SECONDARY) pass, the display will read
"P5" "PASS."
DESCRIPTION
NOTE
NOTE
3-21
T-309