Y7: Defrosting interval thermostat 2
The defrosting interval defines the time, after which each defrosting process starts. With the
beginning of the defrosting process, the defrosting interval starts anew, which results in the
periodic defrosting in firm intervals.
Y8: Defrosting time limit thermostat 2
Here the maximal defrosting time can be set.
b1: Function key 1 (if available)
b2: Function key 2
b4: Function key 4 (if available and not foreseen as TIME key)
At setting = 0 the respective key has no function.
At setting = 1 the controller is switched to standby mode
At setting = 2 the key is linked with the function of parameter F8 or F11 (depending on active data
record). If defrosting has started it is linked with parameters F9 or F12.
At setting = 3 a relay (indicated with parameter Ux) can be switched on or off directly with the key.
In standby mode the key is locked and the corresponding relay switched off. After restarting the
corresponding relay remains switched off.
At setting = 4 a relay (indicated with parameter Ux) is switched despite of
the standby mode.
The
condition of the exit is maintained until the key is pressed again or until it is changed by an external
switching entrance. After net interruption, the condition before power failure is re-installed.
At setting = 5 the actual value of sensor 2 can be indicated. At setting P4=0 the key has no
function.
At setting = 6 the control is switched to data record 1 by additionally pressing the UP key and
switched to data record 2 with the DOWN key. The data record switches the following parameters:
Description
Data record 1 Data record 2
Setpoint
S1
S2
Revolution number
cooling operation
F8
F11
Revolution number
defrosting
F9
F12
The actual setpoint can be displayed and adjusted by pressing the SET key. If only the ventilator
revolution number has to be adjusted both data records must have the same setpoint.
Setting =7 corresponds to setting=6 but when switching the controller on the previous selected
data record is active.
Exception:
If the controller is equipped with a real time clock, the clock sets
the active data record after switching on (if H0=1 and parameters H11…H72 activated).
b3: Function key 3 (standby)
At setting b3=0 the function of the key can be deactivated.
b11: Function external entrance E1
b12: Function external entrance E2
b13: Function external entrance E3
b14: Function external entrance E4
Depending on existing hardware there are no or not all external entrances.
At setting = 1 the controller is switched to the standby mode.
At setting = 2 defrosting of both controllers is started.
At setting = 3 a relay (indicated with parameter Ux) is switched on or off directly. In standby mode it
is locked and the relay is switched off.
At setting = 4 a relay is switched directly (indicated with parameter Ux) regardless of the standby
mode. After net interruption the condition before power failure is re-installed.
