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© 2016 Emerson Climate Technologies, Inc.
AE4-1303 R15
Table 8
Continued
Status
Fault Condition
Code Fault Description
Code Reset
Description
Troubleshooting Information
Alert/Lockout LED Flash
Red
Flash Code 1
Motor High
Temperature
Ω > 4.5K; Lockout after 5
Alerts
Ω < 2.75K and 30
minutes
1) Check supply voltage
2) Check system charge &
superheat
3) Check contactor
Red
Flash Code 2
Open/Shorted
Motor Thermistor
Ω > 220K or Ω < 40;
lockout after 6 hours
40 < Ω < 2.75K and
30 minutes
1) Check for poor connections
at module and thermistor fusite
2) Check continuity of
thermistor wiring harness
Red
Flash Code 3
Short Cycling
Run time of less than
1 minute; lockout if the
number of Alerts exceeds
the number configured by
the user in 24 hours
Interrupt power to
T2-T1 or perform
Modbus reset
command
1) Check system charge and
pressure control setting
2) Adjust set-point of
temperature controller
3) Install anti-short cycling
control
Red
Flash Code 4
Not used with
this family of
compressors
N/A
N/A
N/A
Red
Flash Code 5
Future Use
N/A
N/A
N/A
Red
Flash Code 6
Missing Phase
Missing phase; Lockout
after 10 consecutive Alerts
After 5 minutes
and missing phase
condition is not
present
1) Check incoming power
2) Check fuses/breakers
3) Check contactor
Red
Flash Code 7
Reverse Phase
Reverse phase; Lockout
after 1 Alert
Interrupt power to
T2-T1 or perform
Modbus reset
command
1) Check incoming phase
sequence
2) Check contactor
3) Check module phasing wires
A-B-C
Red
Flash Code 8
Future Use
N/A
N/A
N/A
Red
Flash Code 9
Module Low
Voltage
Low voltage on T2-T1
terminals
1
After 5 minutes and
the voltage is back in
the normal range
1) Verify correct module p/n
2) Check VA rating of
transformer
3) Check for blown fuse in
transformer secondary
1
This Alert does not result in a Lockout
