KE2 Evap
OEM
Alarm Troubleshooting Guide
Q.1.61 January 2023
Page 2
© Copyright 2023 KE2 Therm Solutions, Inc., Washington, Missouri 63090
21214V3.0
Alarms & Notifications List
Alarm Type
Abbreviation
Scrolling Text*
Full Name
Description
Page
Display
Blank Display
No LEDs are illuminated on the display.
Page 4
Ed
Intro Mode
“Ed” on display, yellow and red LEDs flashing.
Page 4
PrF
PrF
N/A
Process Failure
KE2 Basic Display not able to communicate with controller.
Page 4
Sensor Alarms
PSA
PSA
PRESSURE SENSOR
Pressure Sensor Alarm
Suction pressure sensor is shorted, open, or pressure out of
range.
Page 5
SSA
SSA
SUCTION TEMP
SENSOR
Suction Sensor Alarm
Suction temperature sensor is shorted or open.
Page 6
ASA
ASA
AIR TEMP SENSOR
Air Sensor Alarm
Return air temperature sensor is shorted or open.
Page 6
CSA
CSA
COIL TEMP SENSOR
Coil Sensor Alarm
Coil temperature sensor is shorted or open.
Page 6
A1A
A1A
AUX1 SENSOR
AU1 Temp Sensor Alarm
AU1 temperature sensor is shorted or open.
Page 6
A2A
a2a
AUX2 SENSOR
AU2 Temp Sensor Alarm
AU2 temperature sensor is shorted or open.
Page 6
A3A
a3a
AUX3 SENSOR
AU3 Temp Sensor Alarm
AU3 temperature sensor is shorted or open.
Page 6
Defrost
EdF
EdF
EXCESS DEFROST
Excess Defrost Alarm
Time between defrosts too short in demand defrost.
Page 7
dtt
dtt
DEFR TERM ON TIME
Defr Term on Time Alarm Defrost terminated on time instead of temperature for two
consecutive defrosts.
Page 7
Superheat
HSH
HSH
HIGH SUPERHEAT
High Superheat Alarm
[EEV] Superheat 2°F above superheat setpoint for 90 minutes of
cumulative runtime, and valve > 90% open.
[TEV] Superheat above SUPERHEAT setpoint for 90 minutes of
cumulative runtime.
Page 8-9
LSH
LSH
LOW SUPERHEAT
Low Superheat Alarm
Superheat below 3°F for 5 minutes and EEV < 10% open if EEV is
selected.
Page 8-9
Temperature
HtA
HtA
HIGH AIR TEMP
High Temperature Alarm Air temp above Room Temp + Air Temp Diff + High Temp Alarm
Offset for longer than High Temp Alarm Delay.
Page 10
LtA
LtA
LOW AIR TEMP
Low Temperature Alarm
Air temp below Room Temp - Low Temp Offset for longer than
Low Temp Alarm Delay.
Page 10
Door Switch
dor
dor
DOOR SWITCH
Door Open Alarm
Door open and air temp above Room Temp + 0.5°F longer than
Door Alarm Delay.
Page 11
Communication
CoA
CoA
COMMUNICATION
ERROR
Communication Error
No communication between bonded controllers for one minute
or more.
Page 12
CLL
CLL
LEAD/LAG COMM
ERROR
Lead Lag Comms
Communication lost between lead/lag controllers.
Page 12
CCA
CCA
COMP SEQ COMM
ERROR
CompSeq. Comms Alarm Communication lost to KE2 Compressor Sequencer OEM.
Page 12
EFL
EFL
EMAIL FAILURE
Email Failure Alarm
Email alert was not confirmed by email server provided after
seven consecutive attempts
Page 12
NTP
ntP
TIMER SERVER COMM Time Server Comm
Controller cannot communicate with external time of day server
(SNTP server).
Page 12
Digital Inputs
EA1
EA1
EXTERNAL ALARM 1
External Alarm 1
Aux Input 1 is set to External Alarm and the input is active.
Page 13
EA2
EA2
EXTERNAL ALARM 2
External Alarm 2
Aux Input 2 is set to External Alarm and the input is active.
Page 13
EA3
EA3
EXTERNAL ALARM 3
External Alarm 3
Aux Input 3 is set to External Alarm and the input is active.
Page 13