5
* Defrost control.
The automatic defrost is started by the defrost cycle time (P07) and stopped by the maximum defrost
time (P08) or sooner by reaching the maximum defrost temperature (P09). Further has the
ALFA(NET)-45
additional parameters to control defrost;
Parameter 24 = 0:
Function defrost with a fixed defrost cycle time.
With parameter 7 as the chosen cycle time.
Parameter 24 = 1:
Function defrost based on total compressor running hours.
The defrost is started when the compressor has run for parameter 7 hours after the last defrost.
Parameter 25 = 1:
The temperature readout on the display is locked during defrost cycle.
Parameter 26 = 1:
After power-up the
ALFA(NET)-45
starts with defrost after running thru the defrost delay time
of parameter 14. While running down the delay the
ALFA(NET)-45
can cool, after this delay the
defrost is started.
Parameter 21 = 1:
On hot gas systems the compressor is switched on during defrost. After defrost the dripping-off
time of parameter 12 is started. During this time the defrost and compressor relay are
deactivated, so the condenser can drip off it’s water.
