3-21
T-294-01
Code
No.
DESCRIPTION
TITLE
P6-H Not Applicable
This test is not in use starting with model number 69NT40-511-200 and UP.
P6-L Not Applicable
This test is not in use starting with model number 69NT40-511-200 and UP.
P6-2
Suction Modulation
Valve (Open and
Closed)
Setup:
The compressor and fans continue to run from the previous test. The
quench valve (if configured) will operate as in normal control mode. The test
validates a current draw over a specified range of SMV (0 to 50% open).
Pass/Fail Criteria:
This test will fail if any “one” of the following conditions is
true: Pressure limiting is active and condenser pressure is greater than or equal
to 300 psi; Current limiting is active and any one of the three phases are greater
than the user limit; the high pressure switch opened when SMV was 0% open.
Passes if all of the above are false.
P6-3 Quench Valve Test
This test is not in use starting with model number 69NT40-511-200 and UP.
P6-4 Not Applicable
This test is not in use starting with model number 69NT40-511-200 and UP.
P6-5 Not Applicable
This test is not in use starting with model number 69NT40-511-200 and UP.
NOTE
Starting with test P7-0 through test P10, these tests are only included with the “Auto2” (Optional) selection
menu. (Refer to section 3.2.1.)
Setup:
When the unit is running, the condenser fan is de-energized, and a 15
minute timer is started. The right display shows discharge pressure if equipped
with the discharge pressure transducer (DPT), or condenser pressure if
equipped with a condenser pressure transducer (CPT), or discharge pressure if
equipped with either a discharge pressure transducer (DPT) or a condenser
pressure transducer (CPT).
Pass/Fail Criteria:
The test fails if high pressure switch fails to open in 900
seconds.
Note, this test is skipped if the unit does NOT have:
S
A compressor discharge sensor (CPDS).
S
A discharge pressure transducer (DPT).
S
Condenser pressure transducer (CPT).
P7-0 High Pressure
Switch Closed
I
n addition, this test is skipped if:
S
The sensed ambient temperature is less than 7
_
C (45
_
F).
S
The return air temperature is less than --17.8
_
C (0
_
F).
S
The water pressure switch (WP) is open, indicating that the unit is
operating with a water-cooled condenser.
Pass/Fail Criteria:
Under conditions of the above NOTE; the test immediately
fails if the following inputs are sensed to be invalid:
S
Compressor discharge sensor (CPDS).
S
Discharge pressure transducer (DPT).
S
Condenser pressure transducer (CPT).
OR
if any one of the following inputs are sensed to be invalid:
S
Return temperature sensor (RTS).
S
Ambient sensor (AMBS).
In addition, the test will fail if:
S
The high pressure switch (HPS) fails to open within 15 minutes.
S
The discharge temperature exceeds 138
_
C (280
_
F).
S
The discharge temperature is less than or equal to ambient temperature
plus 5
_
C (9
_
F).
S
The condenser pressure transducer (CPT) or discharge pressure
transducer (DPT) pressure exceeds 27.42 kg/cm
2
(390 psig).
P7-1 High Pressure
Switch Open
Requirements:
Test P7-0 must pass for this test to execute. Setup: The
condenser fan is started and a 60 second timer is started.
Pass/Fail Criteria:
Passes the test if the high pressure switch (HPS) closes
within the 60 second time limit, otherwise, it fails.
Downloaded from
