EVCO S.p.A.
EVDRIVE04 | User manual ver. 1.1 | Code 144EPD4I114
Page 30 of 78
6.11
Alarm relay
The alarm relay is managed directly by the application. It is possible to set the
Relay function
(parameter Ph01) and
Relay logic
(parameter Ph02).
The alarm relay can be operate if there is an alarm situation depending of the choose (Ph01 = 1÷5): any alarm, only
probe alarm, only LoSH alarm, only for MOP alarm, only for valve alarm.
If Ph01 = 6, the relay is used to control a solenoid valve which intervenes to block the flow of refrigerant in case of a
power failure, or a disabled valve. The behavior is as follows: the relay remains in the excited state (solenoid valve
open) while the valve is enabled, and is unexcited (solenoid valve closed) if the valve is disabled, or a power failure is
detected.
The Ph01 = 7 combine the configuration 1 and 6.
If Ph01 = 8, the relay will be activated if the resynchronization is requested. To perform a resynchronization operation,
the valve must be disabled.
If Ph01 = 0, the relay is not used by internal application and may be operated by a controller.
The relay remains in the OFF state, as defined by the value in parameter
Relay logic
(parameter Ph02), until it is
changed by the condition defined in parameter
Relay function
(parameter Ph01). E.g: if Ph02 = 0 (normally not
excited), and Ph01 = 1, the relay will be excited when any alarm is set.
