24 RS8FE102, 080R9278 © Danfoss A/S (RA Marketing/MWA), Nov. 08
OPTYMA
TM
Control three-phase Operation and Maintenance Guide
In the event of any anomalies, the OPTYMA
TM
Control
warns the operator by displaying alarm codes and
sounding the warning buzzer inside the control
Alarm codes
panel. If an alarm is tripped, the display will show one
of the following messages:
Alarm code Possible cause Solution
E0 Cold room temperature sensor not working
properly
• Check that the cold room temperature
sensor is working properly.
• If the problem persists, replace the sensor.
E1 Defrost sensor not working properly
(In this case defrosts will last time d3)
• Check that the defrost sensor is working
properly.
• If the problem persists, replace the sensor.
E2 Eeprom alarm
An EEPROM memory alarm has been detected
(All outputs except the alarm are deactivated)
• Switch unit o and back on again.
E8 Man-in-cold-room alarm • Reset the alarm input inside the cold room
Ec Compressor protection tripped (e.g. thermal
protection or max. pressure switch)
(All outputs except the alarm– where
applicable – are deactivated)
• Check that compressor is working properly.
• Check compressor absorption.
• If the problem persists, contact the
technical assistance service.
Temperature
shown on
display is
flashing
Minimum or maximum temperature alarm.
The temperature inside the cold room has
exceeded the min. or max. temperature
alarm setting (see variables A1 and A2, user
programming level)
• Check that the compressor is working
properly.
• Sensor not reading temperature correctly or
compressor start/stop control not working.
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