Application Engineering
B U L L E T I N
AE8-1386 R1
5. Press “SET” to store the new value and move
to the following parameter.
To exit: Press SET + UP or wait 30s without
pressing a key.
NOTE: the set value is stored even when the
procedure is exited by waiting the time-out to expire.
How to Set the Kind of Probes
1. Enter the programming as described in the
previous parameter
2. Select the dEU kind of probe parameter
according to the following:
a. 4-20mA pressure transducers: dEU = Pr4
b. 0.5-4.5V pressure transducers: dEU = Pr5
c. NTC 10K temperature sensors: dEU = tPr
According to the kind of probe the controller will
display the pressure or the temperature.
Refer to Table 7 for recommended probe settings for
some common pressure transducers.
Programming procedure:
(Example based on changing from default pressure
transducer to Ratiometric Pressure transducer)
1. Hold down the SET and DOWN key for 3
seconds.
2. The controller displays the name of the
parameter in the Lower display, its value on
the Upper display. Select Pr2 and Press “SET”
3. Flashing “0---“ is displayed, use the up and
down arrows to set to 3210 and press SET for
each digit.
4. Once the password is entered go to dEU,
press SET, using up and down set to Pr5,
press SET.
5. Set the following parameters PA04, PA20,
FA04, and FA20:
dEU = Pr5
PA04 = Minimum pressure reading on Pb1
PA20 = Maximum pressure reading on Pb1
FA04 = Minimum pressure reading on Pb2
FA20 = Maximum pressure reading on Pb2
Probe Errors
If the display shows a flashing P1 or P2, verify the
probe is wired correctly. If there is a fault on P1, the
Digital compressor will run at 100% loaded. If P2 is
found to be faulty, one fan will be forced on.
A probe error will also be displayed if the probe reads a
value outside the pre-set range.
How to See and Modify the Set Point(s)
How to see the set point of compressors
and/or fans
If the controller is managing both compressors and
fans, both the set points are displayed in sequence,
otherwise only the set point of the enabled section
will be displayed.
1. Push and release the SET key;
2. The Lower display will show the “SEtC” label,
while the Upper display will show its value.
3. To see the fan set point, push again the SET
key.
4. The Lower display will show the “SEtF” label,
while the Upper display will show the fan set
point.
To exit: push the SET key or wait for 30 without
pressing any keys.
Table 7 - Standard Probe Settings
Manufacturer CPC Emerson Flow Controls Dixell
Suction Transducer 800-2200 PT5-07M (802 350) PP11 (939-0007-00)
Discharge Transducer 800-2500 PT5-18M (802 351) PP30 (939-0008-00)
Sensor Type Ratiometric pressure 4-20 mA pressure 4-20 mA pressure
dEU Pr5 Pr4 Pr4
PA04 0 0 -7
PA20 200 100 160
FA04 0 0 0
FA20 500 260 435
© 2013 Emerson Climate Technologies, Inc.
11
Printed in the U.S.A.
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