Electrical connections
30
7.1. Other error messages
ACTUAL
SET
Incorrect/invalid entry. Value too small or too large, or
function not available.
Under menu item E
_
Sb the parameter is set to 1, and
the connection between Pin 2 and Pin 3 of the stand-
by connector is interrupted (see page 30).
8. Electrical connections
Notice: Use shielded cables only.
The shield of the connecting cable is electrically connected to the plug housing.
Stand-by input (L)
1
2
3
+
AK
Ø
Pin assignment: Pin Signal
1 not used
2 5 V / DC
3 0 V
Activate the stand-by input:
Under menu item E
_
Sb, set the parameter to 1
(see page 36).
Connect an external contact 'AK' (e.g. for emergency switch-off)
or an alarm contact of the superordinated application system.
In case the connection between Pin 2 and Pin 3 is interrupted by
opening the contact 'AK', a complete shutdown of the circulating
pump, heater and cooling compressor is effected, and the unit
enters the condition "stand-by". The message "E
_
Sb" appears on
the MULTI-Display (LED2) (see page 30).
Alarm output (M)
1
2
3
This potential-free change-over contact is activated in case of an
alarm.
Pins 2 and 3 are connected under the following conditions:
- alarm
- status "OFF" and "rOFF"
- mains switch "off"
Switching capacity max. 30 W / 40 VA
Switching voltage max. 125 V∼/−
Switching current max. 1 A
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