KE2 Evap
OEM
Alarm Troubleshooting Guide
Q.1.61 January 2023
Page 14
© Copyright 2023 KE2 Therm Solutions, Inc., Washington, Missouri 63090
21214V3.0
Troubleshooting Tables
Alarm & Alarm Name
Description
Variables & Setpoints Corrective Action
Basic
Display
Combo
Display
Web-
pages
dtH
dtH
DOOR TEMP
HIGH
High
Door
Temp
Alarm
Yellow LED is illumi-
nated. Controller will
attempt to continue
to operate system
while this alarm is
present.
Combo door temp
reading above DOOR
TEMP se HI
DOOR ALR OFST for
lon ger than DOOR
TEMP ALR DLY.
Variables
DISP AUX1 STATUS
Setpoints
DOOR TEMP
HI DOOR ALR OFST
DOOR TEMP ALR DLY
• Check to see what the Door Temp variable is reading. If the reading seems abnor-
mally high or low, proceed to Door Temp Sensor alarm corrective actions.
• Confirm DOOR TEMP, HI/LO DOOR ALR OFST, and DOOR TEMP ALR DLY setpoints.
Press and hold
and
to access the KE2 Combo Display setpoints. Press
to navigate to DOOR TEMP. Press
to see the current setpoint. If incorrect,
use the arrows to change the setpoint, then press and hold
to save. Press
to navigate to HI DOOR ALR OFST and DOOR TEMP ALR DLY setpoint; repeat steps if
adjustment is required.
• Confirm where door temp sensor is landed on the controller. DOOR TEMP SENSOR
is the blue connector labeled TEMP1. If incorrect sensor is wired in, re-wire to correct
position.
• See if DISP HEATER RELAY in the VARIABLES menu is showing heater ON or OFF. If con-
troller is in High Door Temp Alarm and relay shows ON, or if controller is in Low Door
Temp Alarm and relay shows OFF, re-check setpoints and sensor reading. Otherwise,
continue with voltage checks below.
• Check to see if door mullion heater circuit has power. The door heater relay is on the
KE2 Combo Display board and labeled SSR-A and SSR-B. Measure each terminal to
ground, it should read correct voltage from each terminal to ground for the applica-
tion.
• After confirming voltage to ground, measure voltage across the SSR-A and SSR-B
terminals. A closed (energized) relay will indicate close to 0V. An open (de-energized)
relay will show the voltage potential between the two terminals. If opposite of what
is expected, controller must be replaced.
• Check walk-in manufacturer literature/support for additional troubleshooting.
dtL
dtL
DOOR TEMP
LOW
Low
Door
Temp
Alarm
Yellow LED is illumi-
nated. Controller will
attempt to continue
to operate system
while this alarm is
present.
Combo door temp
reading below DOOR
TEMP - LO DOOR ALR
OFST for longer than
DOOR TEMP ALR DLY.
Variables
DISP AUX1 STATUS
Setpoints
DOOR TEMP
LO DOOR ALR OFST
DOOR TEMP ALR DLY
– KE2 Combo Display Only