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Q.1.61 December 2022
Page 18
KE2 EvapOEM
Alarm Troubleshooting Guide
Troubleshooting Tables
– KE2 Evap OEM w/ High Side Control Only
Alarm & Alarm Name
Description
Basic
Combo
Web-
Display
Display
pages
HCA
HIGH COND
High
Yellow LED is illumi-
TEMP
Cond
nated. Controller will
HCA
Temp
attempt to continue
to operate system
while this alarm is
present.
Condenser temp
reading is above
Cond Temp setpoint
+ High Cond Temp
Alarm Offset for lon-
ger than High Cond
Temp Delay.
LCA
LOW COND
Low
Yellow LED is illumi-
TEMP
Cond
nated. Controller will
LCA
Temp
attempt to continue
to operate system
while this alarm is
present.
Condenser temp
reading is below
Cond Temp setpoint
- Low Cond Temp
Alarm Offset for lon-
ger than Low Cond
Temp Alarm Delay.
A1A
AUX1 SEN-
Dis Aux1
Discharge temp sen-
SOR
Sensor
sor input is shorted
A1A
or open.
A2A
AUX2 SEN-
Dis Aux 2
SOR
Sensor
A2A
A3A
AUX3 SEN-
Dis Aux3
SOR
Sensor
A3A
21214V3.0
© Copyright 2023 KE2 Therm Solutions, Inc., Washington, Missouri 63090
Q.1.61 January 2023 supersedes all prior publications.
Variables & Setpoints Corrective Action
Variables
• Confirm condenser fans are operating correctly.
AU1, AU2, AU3 – Con-
• Clean condenser/remove any obstructions to proper airflow.
denser Temp (any Aux
• Confirm condenser temp sensor is reading properly.
Input can be set to
Cond Temp).
• Confirm that Cdt, HCO, and HCd setpoints are not set too low or short for the ap-
plication.
Setpoints
Cdt – Cond Temp
Setpoint
HCO – High Cond Temp
Offset
HCd – High Cond Alarm
Delay
Variables
• Confirm condenser fans are operating correctly.
AU1, AU2, AU3 – Con-
• Confirm condenser temp sensor is reading properly.
denser Temp (any Aux
• Confirm that Cdt, LCO, and LCd setpoints are not set too high or short for the ap-
Input can be set to
plication.
Cond Temp).
Setpoints
Cdt – Cond Temp
Setpoint
LCO – Low Cond Temp
Offset
LCd – Low Cond Alarm
Delay
Variables
• The majority of sensor alarms and inaccurate readings are caused by cut, burned,
AU1, AU2, AU3 – Dis-
chaffed or otherwise damaged sensor cable. Inspect the length of the cable for any
charge Temp (any Aux
cut, burned, chaffed or otherwise damaged sections. Repair any damaged sections.
Input can be set to
• Check that the sensor is inserted into the proper position on the KE2 Evap OEM
Discharge Temp).
board. The sensor is not polarized; black and white wires can be inserted in either
position.
• The bare stranded wire of the temperature sensor should be inserted so that the wire
is directly touching the gate of the connector. If the gate is contacting the insulation
of the wire, it will not allow the controller to read the sensor.
• If wires have been extended, check for any bad splices, crimps, or solder joints where
extended.
KE2 Therm Solutions
12 Chamber Drive . Washington, MO 63090
1.888.337.3358 . www.ke2therm.com
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