T
t
Alarm "on"
Alarm "off"
Alarm "off"
Alarm "on"
Setpoint
upper boundary ( relative )
lower boundary ( relative )
Figure 3
Range alarm function
(see Figure 4)
Opposite switching behaviour to the boundary value alarm LED 3 is illuminated and/or K3 is closed if the process
temperature remains between the boundary values.
T
t
Alarm "off"
Alarm "on"
Alarm "on"
Alarm "off"
upper boundary ( absolut )
lower boundary ( absolut )
Setpoint
Figure 4
P32: Hysteresis alarm
The hysteresis for the alarm is always to one side of the Set point .
It is below the Set point in the upper value and above the Set point for the lower value.
d0 Defrost interval
This parameter determines the time interval between the start of successive defrosting periods. The initial start time is
determined by the time of "Mains on".
Defrosting can be initiated by interrupting the defrosting interval in advance by a manual defrost. (Press the "UP-button
for a minimum of 3 seconds)
d2 Defrost temperature
If the actual temperature is above this value defrosting ends.
d3 Defrost time limit
Defrosting ends latest as set here.
Error codes
Display
error
What to do
F1L
sensor short circuit
new sensor
F1H
sensor failure
new sensor
F3L
Boundary alarm
Temperature low
F3H
Boundary alarm
Temperature high
F4
Alarm at connection E1
Liquid level sensor alarm --- control level of cooling liquid
---
Keyboard lock active
see Parameter P19 or A19
display flashing,
buzzer
Temperature alarm
(see A31)
cancel buzzer
with
∇
button
EP
lost of data
in EE-Prom
repair of controller
