
7.5.4 EHS Alarm
In case of the hybrid solution, gas HP unit, the EHS Alarm digital input of the HP unit receives a signal
from the boiler in fault, and the HP unit is forced in Heating to heat the water for space Heating or for DHW
according the priority setting. The HP unit works to reach the DHW set point or water set point for space Heating,
otherwise the compressor will stop.
In order to heat the water also if the external heat source doesn’t work because it is faulty.
EHS Alarm remote contact
Contact OPEN = EHS Normal
Contact CLOSE = EHS Alarm
(EHS Stopped)
20
21
PCB(Terminal)
ON/OFF
or
EHS Alarm
Parameters
Level
Parameter
Function description
Display & Input value
Remarks
Group Code
Default
min.
Max.
Unit
I
51
20
Terminal 20-21 : ON/OFF remote contact or EHS Alarm
input
0=disable
1=ON/OFF remote contact
2=EHS Alarm input
0
0
2
-
ON/OFF by
Remote controller
0=enable
1= ON/disable
OFF/enable
2=enable
77
7. Unit Management
Содержание AEYC-0639U-CH
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