© Danfoss | DCS (vt) | 2019.08
AN30923034432301-000101 | 5
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 back on
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 one – 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. When the door is opened and after tdo time, it’s setted back the
normal functioning giving door open alarm (Ed)
• Check door switch status
• Check door switch connections
• If the problem persists contact the technical assistance service
E9
Cell light alarm.
The light of the cell has been on for a time greater than tdo.
• Turn off the light
EH
Maximum temperature alarm.
The temperature inside the cold room has exceeded the max. temperature alarm
setting (see variables A2, user programming level)
• Check that the compressor is working properly.
• Sensor not reading temperature properly or compressor start/stop
control not working.
EL
Minimum temperature alarm.
The temperature inside the cold room has exceeded the min. temperature alarm
setting (see variables A1, user programming level)
• Check that the compressor is working properly.
• Sensor not reading temperature properly or compressor start/stop
control not working.
Troubleshooting
Variables
Meaning
Value
Default
In1
INP-1 input setting
8 = Night mode digital input (energy saving,
N.O.)
7 = Stop defrosting remotely (N.O.) (reads rising
edge of impulse)
6 = Start defrosting remotely (N.O.) (reads rising
edge of impulse)
5 = Stand-by remotely (N.O.) (In order to indicate
Stand-By mode, the display shows ‘In5’
alternating with the current view)
4 = Pump-down pressure switch (N.O.)
3 = Man-in-room alarm (N.O.)
2 = Compressor protection (N.O.)
1 = Door switch (N.O.)
0 = disabled
-1 = Door switch (N.C.)
-2 = Compressor protection (N.C.)
-3 = Man-in-room alarm (N.C.)
-4 = Pump-down pressure switch (N.C.)
-5 = Stand-by remotely (N.C.) (In order to
indicate Stand-By mode, the display shows
‘In5’ alternating with the current view)
-6 = Start defrosting remotely (N.C.) (reads falling
edge of impulse)
-7 = Stop defrosting remotely (N.C.) (reads falling
edge of impulse)
-8 = Night mode digital input (energy saving,
N.C.)
2
In2
INP-2 input setting
( like In1 )
1
bEE
Buzzer enable
0 = disabled
1 = enabled
1
mOd
Thermostat functioning mode
0 = Cold function
1 = Hot function
(in this mode defrosting and fan disable Fst
are excluded)
0
P1
Password type of protection
(active when PA is not equal 0)
0 = only display set point
1 = display set point, AUX, light access
2 = access in programming not permitted
3 = access in second level programming not
permitted
3
PA
Password
(see P1 for the type of protection)
0...999
0 = not active
0
reL
Release software
indicates software version
read only
