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Connectivity - CN_EXT
Instead of external Dry contact, CN-EXT can be used to lock the heat pump by external signals.
Setting
Contact input
Not use
Open
Simple
operation
Close
Simple Dry
Open
contact
Close
Open
Single
Emergency
stop
Close
* This operation on / off means remote controller of / off for heating & cooling.
Operation *
-
-
Operation "Off"
Operation "On"
Operation "Off"
with dry contact
lock
Lock released
Emergency stop
with forced lock
Forced lock
released
INSTALLER SETTING
Remark
CN_EXT is not used
In case of simple operation, operation on/off is
possible as per either the remote controller or
external input signal.
In this case, "Operation on" is possible only with
the Central controller.
Release dry contact lock setting and "operation
on" is possible depend on dry contact auto
setting
Follows setting
'Dry contact mode':
Auto = Contact closed → Operation on
Manual = Contact closed → Keep on "operation
off" state, but "operation on" is
possible by remote controller manually
In this case, "Operation on" is impossible with
any other controller.
Release forced lock and keep on "operation off"
state, but "operation on" is possible by remote
controller manually
Priority: Emergency stop lock > Central control
lock > Dry contact lock
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