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Q.1.61 January 2023
Page 14
KE2 EvapOEM
Alarm Troubleshooting Guide
Troubleshooting Tables
– KE2 Combo Display Only
Alarm & Alarm Name
Basic
Combo
Web-
Display
Display
pages
dtH
DOOR TEMP
High
HIGH
Door
dtH
Temp
Alarm
dtL
DOOR TEMP
Low
LOW
Door
dtL
Temp
Alarm
© Copyright 2023 KE2 Therm Solutions, Inc., Washington, Missouri 63090
Description
Variables & Setpoints Corrective Action
Yellow LED is illumi-
Variables
nated. Controller will
DISP AUX1 STATUS
attempt to continue
Setpoints
to operate system
DOOR TEMP
while this alarm is
HI DOOR ALR OFST
present.
DOOR TEMP ALR DLY
Combo door temp
reading above DOOR
TEMP setpoint + HI
DOOR ALR OFST for
lon ger than DOOR
TEMP ALR DLY.
Yellow LED is illumi-
Variables
nated. Controller will
DISP AUX1 STATUS
attempt to continue
Setpoints
to operate system
DOOR TEMP
while this alarm is
LO DOOR ALR OFST
present.
DOOR TEMP ALR DLY
Combo door temp
reading below DOOR
TEMP - LO DOOR ALR
OFST for longer than
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 navigate to DOOR TEMP. Press
use the arrows to change the setpoint, then press and hold
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.
to access the KE2 Combo Display setpoints. Press
to see the current setpoint. If incorrect,
to save. Press
21214V3.0
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