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suspended in this mode until the user depresses the
ENTER key.
c. Auto Test Operation From Serial 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.
d. Pre-Trip Test Results
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
sub tests (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.
1.13.2 Pre-Trip Mode
P - Indicator Lamps, LEDs And Displays
All lights and display segments will be energized for 5
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 --- Heater On Test
Setup: Heater must start in the off condition, and be
turned on, a current draw test is done after 15 seconds.
Pass/Fail Criteria: Passes if change in current draw is
in the range specified.
P1-1 --- Heater Off Test
Setup: Heater must start in the on condition, and be
turned off, a current draw test is done after ten (10)
seconds.
Pass/Fail Criteria: Passes if change in current draw is
in the range specified.
P2-0 --- Condenser Fan On Test
Requirements: WPS input must be closed.
Setup: Condenser fan is turned on, a current draw
test is done after fifteen (15) seconds.
Pass/Fail Criteria: Passes if change in current draw
test is in the range specified.
P2-1 --- Condenser Fan Off Test
Setup: Condenser fan is turned off, a current draw
test is done after ten (10) seconds.
Pass/Fail Criteria: Passes if change in current draw
test is in the range specified.
P3 --- Low Speed Evaporator Fans
Requirements: The unit must be equipped with a low
speed evaporator fan, as determined by the Evaporator
Fan speed select configuration variable.
P3-0 --- Low Speed Evaporator Fan On Test
Setup: The low speed Evaporator Fan is turned on, a
current draw test is done after sixty (60) seconds.
Pass/Fail Criteria: Passes if change in current draw is
in the range specified.
P3-1 --- Low Speed Evaporator Fan Off Test
Setup: The low speed Evaporator Fan is turned off, a
current draw test is done after ten (10) seconds.
Pass/Fail Criteria: Passes if change in current draw is
in the range specified.
P4-0 --- High Speed Evaporator Fan On Test
Setup: The high speed Evaporator Fan is turned on, a
current draw test is done after sixty (60) seconds.
Pass/Fail Criteria: Passes if change in current draw is
in the range specified.
P4-1 --- High Speed Evaporator Fan Off Test
Setup: The high speed Evaporator Fan is turned off,
a current draw test is done after ten (10) seconds.
Pass/Fail Criteria: Passes if change in current draw is
in the range specified.
P5-0 --- Supply/Return Probes Test
Setup: The High Speed Evaporator Fan is turned on
and run for 8 minutes, with all other outputs de-ener-
gized.
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 and the PRIMARY/
SECONDARY TEST) pass, the display will read ’ P5 ’
’PASS’.
P5-1 --- Primary/Secondary Test
Requirements: For units equipped with secondary
supply probe only
Pass/Fail Criteria: After 8 minutes, the temperature
difference between primary and secondary probe (sup-
ply) is compared to a standard.
Note: If this test fails, “P5-1” and FAIL will be
displayed. If both Probe tests (this and the SUPPLY/
RETURN TEST) pass, because of the multiple tests, the
display will read ’P 5’ ’PASS’.
P6-0 --- Compressor Test
Setup: The compressor is started, a current draw test
is done for one-hundred fifty (150) seconds with the
additional outputs (if installed) in the following states:
SSV
Closed (69NT40)
Quench
Closed
Unloader
Energized (R-22)
SMV
70%to 0% (Refer to the NOTE
in the beginning of section 1.12.4
for a more detailed description.)
Pass/Fail Criteria: Passes if the change in current
draw is within the valid range.
P6-1 --- Future Expansion
This test is for future expansion.
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