Danfoss ERC 112D VSC User Manual page 12

User Guide | ERC 112D VSC Refrigeration Controller
"PLt" Pull Down Limit Temperature
This parameter sets the minimum allowed temperature during pull-down.
Min. -55.0°C
In order to protect valuable contents you must always specify the absolute
Max. 55.0°C
minimum temperature allowed in your application.
Default 0.0°C
For glass door merchandisers 0°C/32°F protects bottles from freezing;
for commercial fridges you may opt for a slightly higher temperature
(e.g. 2°C)
"Prt" Pull Down Reduction Temperature Δt
The controller calculates a lower set point during pull down mode to
Min. 0.0 K
increase the cooling capacity of your appliance. For each hour the
Max. 10.0 K
cabinet temperature is above the pull down initiate temperature,
Default 0.1 K
the set point is reduced with the value of "Prt".
"PAd" Pull down duration after defrost
Special pulldown duration after every defrost for faster cooling of the cabinet. During this period compressor will run at maxi-
Min. 0 min
mum speed. If configured "0" this feature is disabled.
Max. 999 min
Default 30 min
dEF Defrost settings
"dFt" Defrost Type
"no": defrost function is disabled.
Default no
"EL": electrical defrost.
"Hgd": hot gas defrost (contact Danfoss for details).
"nat": OFF-cycle defrost (natural defrost).
"Add" Adaptive defrost
"no": defrost controlled by time.
Min. no
"yES": automatic defrost control activated.
Max. yes
Default no
"dtt" Terminate Temperature
This parameter defines at what temperature the defrost cycle will stop.
Min. 0.0°C
The temperature is given by the evaporator sensor or by the cabinet temperature sensor if no evaporator sensor is used.
Max. 25.0°C
Default 6.0°C
"drt" Defrost reset temperature
The defrost counter is saved and restored at power-up, but if the temperature sensor, used for defrost, is higher than this
Min. 0.0°C
value at power-up and between minimum and maximum defrost interval, it is assumed that the evaporator is free of ice and
Max. 200.0°C
Default 5.0°C the defrost counter will be cleared.
"dii" Defrost minimum Interval/dii
Defines the minimum time period between the start of two defrost cycles. This parameter is applicable only in Adaptive defrost
Min. 1 hour
mode.
Max. 96 hour
Default 6 hour Once the minimum interval has expired, controller will monitor the evaporator temperature and it will start the defrost if evapo-
rator temperature goes below "dEt" or "ddt" value. If not, it will trigger the defrost once the maximum interval "dAi" has been
reached.
In case of time based defrost it always trigger the defrost at Maximum interval"dAi".
"dAi" Maximum Interval
Defines the maximum time period between the start of two defrost cycles.
Min. 1 hour
Max. 96 hour
Default 7 hour
"dit" Minimum Time
Defines the minimum duration of a defrost cycle. During this period, the controller will not check the temperature. Once the
Min. 0 min
minimum time has expired, the temperature will be checked and if the terminate temperature "dtt" has been reached, the defrost
Max. 240 min
Default 5 min
cycle will end. If dtt has not been reached, defrost will continue until either dtt is reached or the maximum time "dAt" reached,
whichever occurs first.
"dAt" Maximum Time
Defines the maximum duration of a defrost cycle.
Min. 0 min
The controller will not allow a maximum time to be entered which is less than the minimum time, or a minimum time which is
Max. 480 min
Default 30 min more than the maximum time.
12 | BC286552322855en-000201 © Danfoss | DCS (vt) | 2019.07