Elstat ems75sz User manual

ems75sz(sub-zero)-Troubleshooting-Quick-Guide-Iss2
Elstat, Astra Business Centre, Roman Way, Preston, Lancashire, PR2 5AP, United Kingdon
Telephone: [phone]
www.elstatgroup.com
ems75sz Troubleshooting –Quick
Guide
User interface
LED indicators
Compressor.
On when the compressor is running.
Fan.
On when the evaporator fan is running.
Saving mode
temperature
disable.
On if the saving mode temperature is
disabled.
Motion.
On when motion detected.
Buttons
Set
Up
Defrost
(Starts a manual
defrost)
Down
(Also cancels alarms)
Power up sequence
1
Checks all the display
elements are working.
2
Displays the firmware version.
(Example)
3
Displays the checksum.
(Example)
Normal operation
During normal operation the EMS will display one of the messages
below. If one of the below messages is not displayed the EMS has
registered and alarm or fault.
Ready mode
(Displays USE or temperature)
Saving mode
Defrost mode
Door open
Freeze up protection
If evaporator frozen, ensure appliance sensor is
connected properly. Disconnect appliance sensor and
ensure display shows PF1. Otherwise, replace the
controller.
Alarms and troubleshooting
The EMS controller can display messages to aid fault diagnosis. If an
alarm sounds and the EMS controller displays any of the alarms
below, contact your service provider.
Refrigeration system failure
Condenser high temperature alarm (requires a
condenser sensor)
Appliance sensor failure
Condenser sensor failure (if used)
Evaporator sensor failure (if used)
Door open alarm
Cooler lights
do not switch
on
If the EMS controller is in the ready mode,
ensure that the light switch inside the cooler
switched on.
Menu access
To access the menu:
1. Press and hold Set until PAS is displayed.
Press Set four times (x4).
Press Down twice (x2).
Press Up once (x1).
Press Defrost twice (x2).
2. Ensure that PS is displayed.

ems75sz(sub-zero)-Troubleshooting-Quick-Guide-Iss2
Elstat, Astra Business Centre, Roman Way, Preston, Lancashire, PR2 5AP, United Kingdon
Telephone: [phone]
www.elstatgroup.com
Half reset
To clear the self-learning matrix and to restart the learning:
1. Access the menu and press Down to scroll to Hr menu.
2. Press Set and enter the button sequence of the password:
Press Set four times (x4).
Press Down twice (x2).
Press Up once (x1).
Press Defrost twice (x2).
3. Check the ems controller reboots.
Test routine
To test the relays, temperature sensors, and motion sensor:
1. Access the menu and press Down to scroll to tst menu.
2. Press the menu button to display 888.
3. Press Set and Defrost at the same time to start the relay test rel.
Then:
Press Down to test the evaporator fan.
Press Up to test the lights.
Press Set to test the compressor.
Press Defrost to switch off the relays that are on.
4. Press Set and defrost at the same time to start the relay test rL2.
Then, press Down to initiate the test:
Press Up to switch on the defrost heater relay.
Press Defrost to switch off the relay.
5. Press Set and Defrost at the same time to display AnA. Then:
Press Up to view the appliance temperature.
Press Down to test the door switch.
press Defrost to view the condenser temperature
6. Press Set and Defrost at the same time to test the motion detector
Pir. Then, press Defrost and move your hand in front of the motion
sensor. Check that the displayed number increases.
7. Press Set and Defrost at the same time to exit the test mode. The
ems controller then displays USE or the appliance sensor
temperature.
Condenser high temperature
Motion sensor

ems75sz(sub-zero)-Troubleshooting-Quick-Guide-Iss2
Elstat, Astra Business Centre, Roman Way, Preston, Lancashire, PR2 5AP, United Kingdon
Telephone: [phone]
www.elstatgroup.com
Door switch
Temperature sensor
Freeze up protect