Danfoss AK-RC 103 - Page 6

6 Instructions RI8NN35K © Danfoss 01/2010 AK-RC 101 / 103
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.
Ed Open door - alarm (Open door and tdo-time
has expired)
Check door / door contact
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.