ESP+ Tutorial #2 – Status Indicator Lights

ESP+ Intuitive Evaporator Control Technology
ESP+ Tutorial #1 – Viewing Pre-Programmed Settings
December 9, 2019
KeepRite Refrigeration ESP+ Tutorial
ESP+ Tutorial #3 – Changing Basic and Advanced Settings
December 20, 2019
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ESP+ Tutorial #2 – Status Indicator Lights

KeepRite Refrigeration ESP+ Tutorial

By combining award-winning adaptive technology along with an electronic expansion valve to create the groundbreaking ESP+ intuitive evaporator control technology, KeepRite Refrigeration continues to be The Right Choice for the Refrigeration Professional with innovative, state-of-the-art designs

In our last blog you learned how to view the pre-programmed settings on your ESP+ technology, and now you need to know what each of those indicator lights mean so that you can properly change your settings moving forward. These lights on the ESP+ onboard display help to indicate the overall status of your unit.

If you notice the red light flashing on your unit, that means there is one or more critical alarms and the system is not running. When your ESP+ is in this state, the alarms will be shown on the display. Using the “” and “” arrows, you can scroll through the display to see the alarm codes that are taking place. See the Alarm Status Menu below for a description of each code that may appear on the display board.

Alarm Status Menu

ABR.

On-Board Display

Dashboard Display

Full Name

Description

PSA

PSA

PRESSURE SENSOR

Pressure Sensor Alarm

Suction pressure sensor is shorted, open or pressure out of range

SSA

SSA

SUCTION TEMP SENSOR

Suction Sensor Alarm

Suction temperature sensor is shorted or open

ASA

ASA

AIR TEMP SENSOR

Air Sensor Alarm

Return air temperature sensor is shorted or open

CSA

CSA

COIL TEMP SENSOR

Coil Sensor Alarm

Coil temperature sensor is shorted or open

HSH

HSH

HIGH SUPERHEAT

High Superheat Alarm

Superheat above upper limit

LSH

LSH

LOW SUPERHEAT

Low Superheat Alarm

Superheat below lower limit

HtA

HtA

HIGH AIR TEMP

High Temperature Alarm

Room temperature is above ROOM TEMP + AIR TEMP DIFF + HIGH TEMP ALARM OFFSET for longer than HIGH TEMP ALARM DELAY

LtA

LtA

LOW AIR TEMP

Low Temperature Alarm

Room temperature is below ROOM TEMP – LOW TEMP ALARM OFFSET for longer than LOW TEMP ALARM DELAY

EdF

EdF

EXCESS DEFROST

Excess Defrost Alarm

32 defrosts or more within 48 hours

dtt

dtt

DEFR TERM ON TIME

Defr Term on Time Alarm

Defrost terminated on time instead of temperature for two consecutive cycles

dor

dor

DOOR SWITCH

Door Open Alarm

If door is open and room temperature is 5 degrees above ROOM TEMP + AIR TEMP DIFF for DOOR ALARM DELAY time

CoA

CoA

COMMUNICATION ERROR

Communication Error

ONLY FOR BONDED CONTROLLERS: No communication between controllers for one minute or more

EA1

EA1

EXTERNAL ALARM 1

External Alarm 1

If AU1 IN MODE = EXT ALARM: The digital input is in an active state

EA2

EA2

EXTERNAL ALARM 2

External Alarm 2

If AU2 IN MODE = EXT ALARM: The digital input is in an active state

EA3

EA3

EXTERNAL ALARM 3

External Alarm 3

If AU3 IN MODE = EXT ALARM: The digital input is in an active state

EFL

EFL

EMAIL FAILURE

Email Failure Alarm

Email alert was not confirmed by email server provided after seven consecutive attempts

A1A

A1A

AUX1 SENSOR

AU1 Temp sensors Alarm

AU1 temperature sensor is shorted or open

A2A

A2A

AUX2 SENSOR

AU2 Temp sensors Alarm

AU2 temperature sensor is shorted or open

A3A

A3A

AUX3 SENSOR

AU3 Temp sensors Alarm

AU3 temperature sensor is shorted or open

Pdt

Pdt

PUMPDOWN TIMEOUT

Pump Down Timeout

Max time for LPCO pumpdown exceeded

SCC

SCC

SHORT COMP CYCLE

Short Compressor Cycle

Compressor is started an excessive number of times to maintain suction pressure

LPA

LPA

LOW PRESSURE

Low Pressure Alarm

Suction pressure dropped below expected point excessive number of times

PrF

PrF

N/A

Process Failure

Basic Display is not communicating to the controller

If you notice a yellow light, that means there is one or more non-critical alarms, but the system is still running. Similar to the red status indicator light, the alarms will be shown on the display and you can use the “” and “” arrows to scroll through the alarms.

If the green status indicator light is on that means the compressor is running and your ESP+ system is operating smoothly. If you notice the green light is flashing, that simply means the compressor is waiting on a timer to start or stop.

Now that you know the basic settings for your ESP+ technology, the next step is learning how to change those basic and advanced settings. Stay tuned for those instructions coming to you soon!

Ready to skip ahead? Be sure to visit KeepRite Refrigeration’s YouTube page where the full ESP+ Instructional Videos playlist is available.

Now offered on most KeepRite Refrigeration evaporators, to learn more about our ESP+ intuitive evaporator control technology, be sure to visit www.k-rp.com/esp for complete details. If you have any questions, feel free to email evaps@k-rp.com or give us a call at 1-844-893-3222 ext. 520.

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