Features
Two temperature sensors: one for the appliance and one for the discharge line.
Two relays: one for the compressor and one for the lights.
A motion sensor that detects the presence of customers and switches between operational and standby modes.
A user interface with a display and four buttons that allows access to the menu, parameter settings, test routine, and half reset.
A fascia membrane that protects the user interface from water ingress and damage.
Installation
The Elstat EMS 55 Advanced can be mounted either horizontally or vertically, but it is necessary to ensure that the motion detection window has a clear and unrestricted view into the area in front of the cabinet. All line voltage connections are made via 6.5 mm spade terminals and all low voltage connections are made via screw terminal blocks. When installing the Elstat EMS 55 Advanced, it is recommended to use insulated connectors for all line voltage connections.
The appliance sensor should be located in the return air, as it is the most reliable and accurate representation of the liquid temperature inside the cooler. The condenser sensor should be located on the discharge line, as it is used to avoid the refrigeration system overheating. To ensure more accurate sensing of the discharge line temperature, it is advisable to cover both sensor and discharge line with an insulation material.
In addition to the wiring diagram provided in the manual, a door switch should also be wired into the system. This connection must go directly from the door switch to the terminals on the Elstat EMS 55 Advanced (see printed label on the control housing). If a door switch is not used (not recommended), then a wire loop must be fitted to the door switch terminals on the Elstat EMS 55 Advanced.
Operation
The Elstat EMS 55 Advanced has two modes of operation: operational and standby. In operational mode, the controller maintains the set point temperature and switches on the lights. In standby mode, the controller allows the temperature to rise to a higher level and switches off the lights. The controller switches between these modes automatically based on the motion sensor input and the timing parameters.
The user interface consists of a display and four buttons: up, down, menu, and enter. The display shows various information such as product temperature, parameter settings, display codes, and error messages. The buttons allow access to different functions such as menu, parameter settings, test routine, and half reset.
The menu function allows access to various parameters that can be adjusted by the user or service technician. These parameters include set point, differential, saving set point, saving differential, delay to saving, saving restart period, motion sensor enable, defrost termination method, defrost termination temperature, maximum defrost on demand time, freeze-up protection, compressor rest time, display mode, delay to saving mode changeover time (OFC firmware only), etc. The parameter settings are explained in detail in the manual.
The test routine function allows testing of various components such as relays, sensors, motion sensor, display, etc. The test routine can be accessed by pressing menu and enter simultaneously for three seconds. The test routine is described in detail in the manual.
The half reset function allows resetting of some parameters to their factory default values. The half reset can be performed by pressing up and down simultaneously for three seconds. The half reset does not affect parameters such as set point, differential, saving set point, saving differential, delay to saving mode changeover time (OFC firmware only), etc. The half reset is explained in detail in the manual.
Troubleshooting
The Elstat EMS 55 Advanced has a built-in diagnostic system that detects and displays various error codes. These error codes indicate the possible causes of malfunction and the recommended actions to take. The error codes are listed and explained in the manual.
Some common error codes are:
Error code
Description
Recommended action
E1
Appliance sensor open circuit or short circuit
Check the appliance sensor and its wiring. Replace if necessary.
E2
Condenser sensor open circuit or short circuit
Check the condenser sensor and its wiring. Replace if necessary.
E3
Discharge line temperature too high
Check the refrigeration system and the condenser sensor. Clean the condenser coil if dirty.
E4
Appliance temperature too high
Check the refrigeration system and the appliance sensor. Ensure proper air circulation inside the cooler.
E5
Appliance temperature too low
Check the refrigeration system and the appliance sensor. Adjust the set point or differential if necessary.
If the error codes do not help to resolve the problem, please contact Elstat Electronics Ltd. for further assistance.
I hope this article was helpful to you. Thank you for reading.
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