3
* Alarm function
When there is an error message or an alarm, an error code message appears in the display. The
ALFANET 95
remembers this failure message, even if the problem has already been solved. The
failure message can be reset with the
SET
key. If, after pressing the
SET
key (=reset alarm) the alarm
is not yet solved, then the
ALFANET 95
shows the temperature and error code alternately, if the alarm
has been solved then the error code disappears and the temperature is shown again.
* Fan control settings
The
ALFANET 95
has various adjustment possibilities for the Fan. Normally, the fan is always running
unless one of the parameters below is set at 1:
Parameter 20 = 1: Fan switch differential active.
The fan only active if the temperature of the defrost sensor is lower than the control sensor
temperature minus the temperature of the switch differential fan (P21)
{Fan on if T
defrost
< (T
control
- T
fandiff.
)}.
Parameter 25,26: Fan switching on delay after defrosting.
After defrosting and draining of the humidifier, to prevent the fan from running immediately and thus
blowing warm air into the cell, the following two conditions can be set, i.e.;
a. The fan is blocked until the defrost-sensor measures a temperature that is lower than the set
switching on temperature of the fan (P25).
b. The fan is blocked until the switching on delay of the fan (P26) is over, when the defrost- sensor
reaches the switching on temperature (P25) within the switching on delay, then the fan is
unblocked.
Parameter 22 = 1: Fan is off, when the compressor is off.
The fan is turned off if the compressor is off. This happens with a delay of parameter 23.
* Defrost control possibilities.
The automatic defrost is started on a real-time (P60) base and stops after the maximal defrost time
(P30), or earlier if the defrost sensor has reached the defrost end-temperature (P31). The
ALFANET
95
has a number of automatic defrost possibilities that can be set with the following parameters;
Parameter 24
Type of defrost:
The
ALFANET 95
has three possibilities for defrosting;
P24 = 0
For defrost only the relay FAN is switched on (natural defrosting).
P24 = 1
For defrosting only the relay DEFR. is switched on (hot gas / electrical defrosting).
P24 = 2
For defrosting both the DEFR. and the FAN relays are switched on (hot
gas/elefan defrosting).
Parameter 60 = 1Defrosting on the real-time clock
Here, the defrosting is started at set times (P61 to P71).
