Hitachi SAMURAI Series Service Manual page 50

2 Control Functions
Control of Master/Slave group
5 Remote Forced Stop (Alarm Reset) / System Recovery Wiring
Connect to each chiller unit to force stop of a chiller unit in operation from a remote location, to reset an alarm, or to
return to the system a chiller unit that had been excluded from the target of the control of Master/Slave group. (When
a chiller unit is stopped because of an alarm, or by a forced stop order, it becomes excluded from the target of the
control of Master/Slave group (detached). It is necessary to perform system recovery operation in order to regain the
target of the control of Master/Slave group.
Also, in case of using it to reset an alarm, it is necessary to enable the optional function (LCD screen setting)
"Remote stop reset" at each of the chiller units.
(Forced stop signal)
(Alarm reset)
ON
OFF
Run
Relevant
Unit Stop
Forced stop
ON
OFF
Detached
Relevant
from
Unit
control
target
System recovery
?
N O T E
• It is also possible to perform forced stop by the push button switch (Stop) and to perform system recovery by the push button switch
(Run) in the module.
• Led RL on: on order
2
• Led RL off: off order
2
42 SMGB0120 rev.0 - 11/2017
Remove the connection
between 5 and 6
(System recovery
signal)
More than 200ms
More than 200ms
More than 200ms
ON
OFF
ON
Alarm
Output
OFF
Alarm reset
System recovery signal
Forced stop-
Alarm reset signal