13
© 2011 Emerson Climate Technologies
Printed in the U.S.A.
AE8-1384 R1
Application Engineering
B
U
L
L
E
T
I
N
Table 6 – CoreSense
™
Communications LED Flash Code Information
The
fl
ash code number corresponds to the number of LED
fl
ashes, followed by a pause, and then the
fl
ash code is repeated. A lockout
condition produces a red
fl
ash, followed by a pause, a solid red, a second pause, and then repeated.
Status
Fault Condition
Code Fault Description
Code Reset
Description
Trouble Shooting Information
Solid Green
Normal Operation
Module is powered and
operation is normal
N/A
N/A
Solid Red
Module
Malfunction
Module has internal fault
N/A
1) Reset module by removing
power from T2-T1
2)Replace module
Warning LED Flash
Green
Flash Code 1
Loss of
Communication
Module and master
controller have lost
communications with each
other for more than 5
minutes
When
communications are
con
fi
rmed
1)Check the control wiring
2)Verify dipswitch 8 is "on"
Green
Flash Code 2
Future Use
N/A
N/A
N/A
Green
Flash Code 3
Short Cycling
Run time of less than 1
minute; number of short
cycles exceeds 48 in 24
hours
< 48 short cycles in
24 hours
1) Check system charge and
pressure control setting
2) Adjust set-point of
temperature controller
3) Install anti-short cycling
control
Green
Flash Code 4
Open/Shorted
Scroll Thermistor
Ω
> 370K or
Ω
< 1K
5.1K <
Ω
< 370K
1) Check for poor connections
at module and thermistor fusite
2) Check continuity of
thermistor wiring harness
Green
Flash Code 5
Future Use
N/A
N/A
N/A
Table 5 – DIP Switch Purpose
DIP Switch Number
On
Off
1 through 5
Modbus Module Address
6
Baud Rate = 9600
Baud Rate = 19200
7
Even Parity
No Parity
8
Network Mode
Stand Alone
9
1
TE*
TW*
10
Enable Short Cycle Protection
Disable Short Cycle Protection
1
Thermistor Con
fi
guration: TE* = PTC & NTC, TW* = PTC Only
