Defrost Schedules - Danfoss AK-CC55 Water Loop User Manual

AK-CC55 Water Loop
Function Description
Time staggering Time staggering for defrost cut-ins during start-up
power-up The function is only relevant if you have several refrig-
eration appliances or groups where you want the de-
frost to be staggered in relation to one another. The
function is furthermore only relevant if you have
chosen defrost with interval start. The function delays
the interval time by the set number of minutes, but it
only does it once, and this at the very first defrost tak-
ing place when voltage is connected to the controller.
The function will be active after each and every pow-
er failure.
Max. thermostat run Defrost on demand. Aggregate refrigeration time set
time here is the refrigeration time allowed without de-
frosts. If the time is passed, a defrost will be started.
With setting = 0 the function is not in use.
Drip off time Here you set the time that is to elapse from a defrost
and until the compressor is to start again. (The time
when water drips off the evaporator).
Max. hold time Max. standby time after coordinated defrost. When a
controller has completed a defrost it will wait for a
signal tellingthat the refrigeration may be resumed. If
this signal fails to appear for one reason or another,
the controller itself will start the refrigeration when
the standby time has elapsed.
Fan control during Fan operation during defrost Here you can set how
defrost the fan is to operate during defrost.0: Stopped (runs
during pump down)1: Running (stopped during "fan
delay)2: Running during pump down and defrost. Af-
ter that stopped3: Running during pump down and
defrost until defrost stop sensor reaches fan stop tem-
perature limit
Fan start delay Delay of fan start after defrost. Here you set the time
that is to elapse from compressor start after a defrost
and until the fan may start again. (The time when re-
maining water is transformed into ice on the evapora-
tor).
Fan start tempera- Temperature limit for starting the fans after a defrost.
ture When the measured S5 evaporator temperature is
getting below the set limit, the fans are started
Fan stop tempera- If the fan control during defrost has been set up for it,
ture the fans can be stopped during the defrost if the de-
frost sensor exceeds the set temperature limit
Rail heat during de- Define how rail heat is controlled during defrost0: Rail
frost heat is OFF all the time1: Rail heat is ON all the time2:
Normal rail heat control
Display delay after Set the maximum time the display should show the
defrost defrost code "-d-" after a defrost. The normal temper-
ature readout is normally started when the tempera-
ture in the case is OK again or if a high temperature
alarm is raised.

Defrost schedules

Table 24: Defrost schedules
Function Description
Defrost schedule
Def. start 1 - Hours Time in hours for start of defrost
Def. start 1 - Minutes Time in minutes for when defrost cycle is to be star-
ted
Def. start 2 - Hours Time in hours for start of defrost
Def. start 2 - Minutes Time in minutes for when defrost cycle is to be star-
ted
Def. start 3 - Hours Time in hours for start of defrost
Def. start 3 - Minutes Time in minutes for when defrost cycle is to be star-
ted
Def. start 4 - Hours Time in hours for start of defrost
Def. start 4 - Minutes Time in minutes for when defrost cycle is to be star-
ted
Def. start 5 - Hours Time in hours for start of defrost
Def. start 5 - Minutes Time in minutes for when defrost cycle is to be star-
ted
© Danfoss | Climate Solutions | 2022.04
Values
0=OFF, 1=ON, 2=OFF at drip, 3=OFF at high temp
0=OFF, 1=ON, 2=Normal control
Values
0=No, 1=Yes
Code Short name
d05 d05 Time stagg.
d18 d18 MaxTherRunT.
d06 d06 DripOff time
o16 o16 MaxHoldTime
d09 d09 FanDuringDef
d07 d07 FanStartDel
d08 d08 FanStartTemp
d41 d41 Def Fan Stop
d27 d27 Railh.at def
d40 d40 Disp. d del.
Code Short name
t00 t00 Def.Schedule
t01 t01 Def. 1 hr.
t11 t11 Def. 1 min.
t02 t02 Def. 2 hr.
t12 t12 Def. 2 min.
t03 t03 Def. 3 hr.
t13 t13 Def. 3 min.
t04 t04 Def. 4 hr.
t14 t14 Def. 4 min.
t05 t05 Def. 5 hr.
t15 t15 Def. 5 min.
BC378540472015en-000101 | 53