Q.3.49 April 2017
Page 6
KE2 Temp + Valve (pn 21301)
For Medium Temperature Applications with Air Defrost
Installation Manual
© Copyright 2017 KE2 Therm Solutions, Inc., Washington, Missouri 63090
Service Call Saver - Post Defrost Indicator
To eliminate unnecessary/unwarranted service calls, the KE2 Temp
+ Valve alerts the user when it is coming out of a defrost cycle us-
ing the onboard display. The display alternates between dEF and the
actual temperature measured by the air sensor. This continues until
the temperature has reached setpoint, or for the amount of time set
by dFt (Defrost Time) whichever is shorter.
Refrigerant List
Refrigerant Abbreviation
R-22 R22
R-134a 134
R-404A 404
R-407A 40A
R-407C 40C
R410A 410
R-717 717
R-422A 42A
R-422D 42d
R-507 507
R-448A 448
R-449A 449
R-450A 450
R-438A 438
R-408A 408
R-409A 409
R407F 407
R-744 744
R-513A 513
R-458A 458
Variables Menu
Name Description Range
rtP rtP Room Temperature (not shown if in EEPR or EHGBP control, and input is pressure) -50ºF to 100ºF
SYS SYS System Mode: Refrigerate, Defrost, O, System O (manually) rEF, dEF, OFF, SOF
SH SH Superheat (only shown if SH or SHt control selected) 0ºF to 200ºF
PrS Prs Pressure (only if pressure mode selected) -14.6 to 150 psig
SUt SUt Suction Temperature (only if in SH or SHt control selected) -50ºF to 150ºF
SAt SAT Saturation Temperature (only if in SH or SHt control selected, and Pt is selected as input) -87ºF to 150ºF
inL inL Inlet Temperature (only if in SH or SHt control selected, and tt selected as input) -50ºF to 150ºF
OPn OPn Valve Percent Open 0 to 100%
COr COr Compressor Relay OFF - On OFF On
ALS ALS Alarm Status: See table below for alarm descriptions.
nOA nOA (no alarm), PSA, SSA, iSA,
ASA, HSH, LSH, LPA, Pdt, SCC, HtA, HPA,
LtA, LPA, PF
Alarm List
Alarms Description LED
CRITICAL
System is o.
iSA iSA Inlet Sensor Alarm: Valve closes and turns system o. Red
PSA PSA Pressure Sensor Alarm: Valve closes and turns system o. Red
SSA SSA Suction Temperature Sensor Alarm: Valve closes and turns system o. Red
NON -CRITICAL
System is still running, and trying to maintain cooling
ASA ASA Room (Air )Sensor Alarm: Alarm occurs when the room temperature sensor input is open or
shorted. Amber
HPA HPA
High Pressure Alarm: occurs when the temperature reading is above the Pressure set point
+ High Alarm Oset setpoint for the amount of time in setpoint High/Low Alarm Delay.; High
Temperature or pressure alarm is suppressed while in defrost.
Amber
HSH HSH High Superheat Alarm: Occurs when superheat is 2 or more degrees above setpoint and
valve is 100% open for 90 minutes; Clears when superheat is within 2 degrees of setpoint Amber
HtA HtA
High Temperature Alarm: occurs when the temperature reading is above theTemperature
set point + Temperature dierential set point + High Alarm Oset set point for the amount
of time in setpoint High/Low Alarm Delay; High Temperature or pressure alarm is cleared and
disabled while in defrost
Amber
LPA LPA
Low Pressure Alarm:When LPC (Low Pressure Cut Out) is enabled while in refrigeation mode,
if compressor is shut o 3 times for pressure going below LPC set point without being satised
on temperature, set alarm; Alarm is cleared when temperature is satised
Amber
LSH LSH Low Superheat Alarm: Occurs when superheat is less than 3 degrees for 5 minutes; Clears
when superheat is above 3 Fahrenheit degrees Amber
LtA LtA
Low Temperature Alarm: occurs when the temperature reading is below the Temperature
setpoint - Low Alarm Oset setpoint for the amount of time in setpoint High & Low Tempera-
ture Alarm Delay; Low temperature or pressure is cleared and disabled when in defrost
Amber
Pdt Pdt
Pump Down Timeout Alarm: Occurs when call for pumping system down and the compres-
sor is turned o due to time out instead of pressure reaching LPC setpoint for 2 consecutive
times; Alarm is cleared when pressure reaches LPC setpoint instead of timing out.
Amber
PF Pf Power Failure: occurs when the controller has lost power at some point, and controller had
CUS (custom defrost schedule) selected under Defrosts Per Day Amber
SCC sCC
Short Compressor Cycle Alarm: Occurs when the compressor has to come back on because of
pressure going above LPC set point without satisfying minimum o time. If this occurs 4 times
while in O mode, can be over multiple cycles, set alarm; Clear alarm if pressure does not go
above LPC setpoint through minimum o time.
Amber
