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6.1 Switching on the operating voltage
The controller is started by means of a control switch provided by the
customer.
The first time the controller is started, pre-programmed setting values
are used which at a later point can be adapted for individual require-
ments.
If alarm “AL 2” (temperature in refrigerated chamber too high
or too low) is displayed when the controller is switched on, this
can be cleared by pressing the key.
6.2 Display
During normal operation the current cold store temperature is
displayed. It is measured with cold store sensor T1.
In the event of an alarm, the most recent alarm message (e.g. AL1)
and the cold store temperature are displayed alternately.
Two spot indicators show the switching status of the relays during
operation:
Pos. 1: On : Relay on.
Off: Relay off.
Flashes: Start-up delay E03
active.
Pos. 3: On : Defrost interval is active –
relay de-energized.
6.3 Functions of keys
☛ Never operate the keys with sharp objects
(screwdriver or similar).
Display of setpoint Press and hold down key.
value
Clear alarm Press key.
messages (If the sensor is faulty, switch
mains voltage ON/OFF).
Manual defrost Press key for 5 secs.
initiation
Display of time Press and keys in sequence
until the next and hold both down.
defrost (Display in hours and minutes).
Display limit value Press key.
for excess
temperature
(cold store sensor T1)