OPTYMA
TM
Control single-phase AK-RC 101
RS8FD402
©
Danfoss A/S 2014/11
15
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
Trouble shooting / Alarm list
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 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 defrost sensor is working
properly
• If the problems persists replace the sensor
E2
Eeprom alarm
An EEPROM memory alarm has been detected
(All outputs except the alarm one are
deactivated)
• Switch unit off and then back on again
E8
Man-in-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 one – where
applicable – are deactivated)
• Check that compressor is working properly
• Check compressor absorption
• If the problem persists contact the technical
assistance
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 properly or
compressor start/stop control not working.