15
© 2016 Emerson Climate Technologies, Inc.
AE8-1384 R5
Table 6 Continued
1
This Alert does not result in a Lockout
Alert/Lockout LED Flash
Red
Flash Code 1
Motor High
Temperature
Ω > 4.5K ± 25%;
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 3
minutes; 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
Scroll High
Temperature
Ω < 2.4K; 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
superheat
2) Check system operating
conditions
3) Check for abnormally low
suction pressure
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
