3-21
T-296
Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 of 4)
Code
No.
TITLE
DESCRIPTION
NOTE
“Auto” or “Auto1” menu includes the: P, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2” menu in-
cludes 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
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.
P1-0
Heaters Turned On
S
etup:
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.
P1-1
Heaters Turned Off
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.
P2-0
Condenser Fan On
Requirements:
Water pressure switch (WP) input must be closed.
Setup:
Condenser fan is turned ON, a current draw test is done after 15 sec-
onds.
Pass/Fail Criteria:
Passes if current draw change is within the range specified.
P2-1
Condenser Fan Off
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.
P3
Low Speed Evapo-
rator Fans
R
equirements:
The unit must be equipped with a low speed evaporator fan, as
determined by the Evaporator Fan speed select configuration variable.
NOTE
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.
P3-0
Low Speed Evapo-
rator Fan Motors On
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.
P3-1
Low Speed Evapo-
rator Fan Motors Off
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.
P4-0
High Speed Evapo-
rator Fan Motors On
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.
P4-1
High Speed Evapo-
rator Fan Motors Off
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.
P5-0 Supply/Return Probe
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.
NOTE
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.”
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