Specifications

56
© 2012 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
AE8-1368 R2
7.0 Service Instructions
7.1 Control Module Replacement
In the event of a control module failure, contact the
Emerson Climate Technologies Wholesaler to obtain
a replacement device. The last two digits of the
part number (XX) designate the software version
loaded into the module. The control module used for
CoreSense Diagnostics v2.11 is universal for all 2D,
3D, 4D, and 6D compressors.
To perform the installation of the new control module
follow these steps:
1. Remove power to the affected control module.
Once power has been removed, both the LCD
and LED display on the front of the module will
be dark.
2. Access the control module electrical connections
by removing the access cover at the bottom of
the module.
3. Unplug all of the control module connections
located on the bottom edge of the control module
circuit board.
4. Remove the remaining four screws that secure
the control module to the mounting plate.
5. Note the DIP switch settings. If the module was
operating properly before failure, transfer those
settings to the new control module. Otherwise
refer to Section 4.1 to determine the proper
settings. The same can be said for both the
controller and termination jumpers on the new
control module.
6. Attach the new control module to the mounting
plate using the four screws removed in step 4.
7. Make all harness connections removed in step
number 3.
8. Apply power to the module. Once powered,
the control module will display the DIP switch
settings on the LCD. Verify that these settings are
correct. With the proper DIP switch settings, the
new module will be ready for normal operation.
Refer to instruction sheet provided with the
new control module for additional programming
steps.
9. Using the provided packaging from the
replacement module, return the failed unit to
your Emerson Climate Technologies Wholesaler
for a refund on your core charge or warranty
replacement of the failed module.
7.2 Sensor Module Replacement
The CoreSense Diagnostics compressor sensor
module relays information concerning the compressor
current and voltage to the control module. If a
failure would occur to the sensor module the control
module would display "No Communications to
Sensor Module". While the compressor would remain
functional, enhanced motor protection features would
be disabled. The features affected are:
- Locked Rotor Protection
- Welded Contactor Protection
- Voltage Imbalance Protection
- Low Voltage Protection
Basic compressor motor protection based on internal
line break sensors (2D/3D) or PTC's (4D/6D) will still
be present.
In the event of a sensor module failure, contact
an Emerson Wholesaler to obtain a replacement
device. There are two versions of the sensor module
depending upon the application. Part number 543-
0062-XX is the standard version of the sensor module
used on compressors without part-winding start. Part
number 543-0082-XX is the sensor module used on
compressors with part-winding start. The last two digits
of the part number (XX) designate the software version
loaded into the module.
To perform the installation of the new control module
follow these steps:
1. Remove power to the affected device. Be sure
to switch power off to both the compressor and
module. Always turn off compressor power
before working on connections in the compressor
terminal box. Once power has been removed,
both the LCD and LED display on the sensor
module will be dark. If the module in question is
powering a crankcase heater, be sure that this
power is switched as well.
2. Remove the terminal box cover to access the
sensor module. The LED on the sensor module
should be dark indicating that 24V power has
been removed.
3. Disconnect all connections going to the sensor
module. These connections include:
• Compressor Voltage Sensors (x3)
• Current Sensor (x2 if compressor is part-
winding start)
• Crankcase Heater Supply and Power (if
present)