Carrier 69NT40-541-500 Operation And Service Manual page 80

P5-4 - P5-9
Humidity Sensor
Controller
P5-10
Configuration
Verification Test
Humidity Sensor
P5-11 Installation
Verification Test
Humidity Sensor
P5-12
Range Check Test
P6 Tests - Compressor and Refrigerant Valves: This section of testing deals with the Compressor and the two
Compressor valves: Suction Modulation Valve and Quench Valve.
P6-0 Compressor On
P6-1,
P6-H, Not Applicable
P6-L
Suction Modulation
P6-2 Valve (Open and
Closed)
P6-3 Quench Valve Test
P6-4 Not Applicable
P6-5 Not Applicable
P6-6 Not Applicable
P70 & P8 are included with the Auto2 & Auto 3 only. P90 through P10 are included with Auto2 only.
T-363
Table 4–7 Controller Pre-Trip Test Codes
Not Applicable
This is a Pass/Fail/Skip test of the humidity sensor configuration.
Test passes if the controller configuration has humidity sensor in.
Test fails if the controller configuration has humidity sensor out and Vout is greater
than 0.20 Volts for the humidity sensor.
Test is skipped if the controller configuration has the humidity sensor out and Vout
is less than 0.20 Volts. Unit must be configured with a Humidity Sensor for this test
is run.
This is a Pass/Fail test of humidity sensor installation (sensor is present).
Test passes if Vout is greater than 0.20 Volts for the humidity sensor.
Test fails if Vout is less than 0.20 Volts for the humidity sensor.
Test P5-10 must pass before this test is run.
This is a Pass/Fail test of the Humidity Sensor Range.
Test passes if Vout for the humidity sensor is between 0.33 Volts and 4 Volts.
Test fails if Vout is outside of this range.
Test P5-11 must pass before this test is run.
A current draw test is performed before the compressor is started. The compres-
sor is started, the SMV is opened, and another current draw test is performed.
Test Passes if the change in compressor current draw is within the specified range.
These tests are not run for Single Speed Compressors.
The compressor and fans continue to run from the previous test. The quench valve
(if configured) will operate as in normal control mode. The SMV is closed to 0%
open, current and condenser pressure readings are taken. The SMV is opened to
50% with continuous current and condenser pressure readings taken to establish
maximum values. The SMV is returned to 0% open and final readings are taken.
Test passes if the calculated difference in current at the 50% open position are
above a specified value before and after opening of the SMV, OR the calculated
difference in condenser pressure at the 50% open position are above a specified
value before and after opening of the SMV.
To run this test, the system must be equipped with a solenoid quench valve as de-
termined by CnF12, (TXV/Solenoid Quench Valve), and ambient temperature
must be greater than -12C.
Compressor suction temperature is measured with the Quench valve closed, the
Quench valve is energized and the suction temperature drop is checked.
Test passes if suction temperature is within the valid range.
This test is not run for units configured with a stepper type SMV.
This test is not run, units with stepper type SMVs are not configured with a by pass
valve.
This test is only run on systems that have an Unloader as indicated by CnF13 (Un-
loader).
NOTE
4–48