Resetting Alert Codes; Commissioning Communications - Emerson Copeland CoreSense 571-0065-05 Bulletin

Once the module has locked out the compressor,
a power cycle or Modbus reset command will be
required to clear the lockout.
Code 3 – Short Cycling
The module will flash the red Alert LED three times
indicating the compressor is locked out due to short
cycling. A Code 3 Alert will open the M2-M1 contacts.
Code 3 will be enabled when the "Short Cycling"
dipswitch (#10) is "on" or in the "up" position and the
compressor has exceeded the number of short cycles
configured by the user in a 24 hour period. Once the
module has locked out the compressor, a power cycle
or Modbus reset command will be required to clear
the lockout.
Code 4 – Scroll High Temperature
The module will flash the red Alert LED four times
indicating the scroll NTC circuit is less than 2.4K
Ohms. A Code 4 Alert will open the M2-M1 contacts.
The Alert will reset after 30 minutes and the M2-
M1 contacts will close if the resistance of the scroll
NTC circuit is higher than 5.1K Ohms. The module
will lockout the compressor if the number of Code
4 Alerts exceeds the user configurable number of
Code 4 events within a 24 hour period. Once the
module has locked out the compressor, a power cycle
or Modbus reset command will be required to clear
the lockout.
Code 5 – Reserved for Future Use
Code 6 – Missing Phase
The module will flash the red Alert LED six times
indicating a missing phase in one of the three leads
to the compressor. A Code 6 Alert will open the M2-
M1 contacts. The Alert will reset after 5 minutes and
the M2-M1 contacts will close if the missing phase
condition is not present. The module will lockout the
compressor after 10 consecutive Code 6 Alerts.
Once the module has locked out the compressor,
a power cycle or Modbus reset command will be
required to clear the lockout.
Code 7 – Reverse Phase
The module will flash the red Alert LED seven times
indicating a reverse phase in two of the three leads
to the compressor. A Code 7 Alert will open the M2-
M1 contacts. The module will lockout the compressor
after one Code 7 Alert. A power cycle or Modbus
reset command will be required to clear the lockout.
Code 8 – Reserved For Future Use
© 2016 Emerson Climate Technologies, Inc.
Code 9 – Module Low Voltage
The module will flash the red Alert LED nine times
indicating low module voltage (see Table 2) on the
T2-T1 terminals for more than 5 seconds. A Code
9 Alert will open the M2-M1 contacts. The Alert will
reset after 5 minutes and the M2-M1 contacts will
close if the T2-T1 voltage is above the reset value
in Table 2.
Please see Table 6 for a summary of Warning and Alert
codes and troubleshooting information.

Resetting Alert Codes

Resetting Alert codes can be accomplished in two
different ways. First, Alert codes can be reset manually
by cycling power to the module (disconnect T2 or T1
for 5 seconds). The second way to reset Alert codes
is to send a Modbus reset command from the master
controller.
Power Up Delay
When CoreSense Communications is cycled off, there
is a thirteen to fifteen second delay before the module
is active.
If the fault that initiated the Alert code is absent after
one of the above resets is performed, the Alert code will
be cleared and CoreSense will allow normal operation.
If the fault is still present after the reset is performed the
fault code will continue to be displayed via the green
or red flashing LED.
COMMISSIONING
Communications
Programming knowledge and a familiarity with
Modbus will be required by the system designer
to use the communications features of CoreSense
Communications. CoreSense Communications
has opto-isolated RS485 for the physical layer. The
communication protocol is Standard Modbus and
Emerson Climate Technologies Modbus. CoreSense
Communications will act as the Modbus slave, while
the master will be implemented in a system controller,
PC software, or any other equivalent external device.
Use of the communications feature of CoreSense
Communications allows the master access to much of
the data that resides in the CoreSense Communications
module. Emerson Climate Technologies Modbus has
six message categories:
1. Device ID Messages
2. CoreSense Status Messages
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AE8-1384 R5