Hitachi SAMURAI Series Service Manual page 15
Condenserless water chillers
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Also See for SAMURAI Series:
- Service manual (174 pages) ,
- Service manual (140 pages) ,
- Manual (118 pages)
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2. Control Functions
Control functions on the module
Item
It is possible to determine thermo OFF from the inlet water temperature (return temperature from load) of the
chiller unit. It is possible to change the settings of thermo OFF temperature.
Thermo OFF
judgement due to
inlet temperature
Since this function is optional, it is necessary to make the settings for the enabling of this function at the time of
local installation.
When an alarm occurs, the contents of the alarm, as well as the date and time of occurrence are recorded.
The most recent 10 cases are stored, and then they are deleted from the oldest. Also, for the most recent 3
Preservation of
cases, the data of each sensor (right before occurrence, 10 seconds before and 20 seconds before) as well as
alarm data
data regarding each setting and operation conditions are stored, and it is possible to check them later on. This
supports the early identification of the causes of alarm occurrence.
Water Temp Set
Setting is possible in 0.5ºC units.
Main unit side
LCD device: Displays the status of the chiller unit (Run, stop, contents of alarm, operating pressure and
temperature, etc.)
7-Segment (for backup of the LCD): Displays the status of the unit and content of alarms with individual codes
Display
Pilot lamps: Lit on for power source: white, run: red, alarm: orange
Remote display
Outputs operation of the chiller unit, pump operation, alarm, warning and defrosting
When installing multiple units, operation as one entire heat system is possible by connecting each chiller unit
through H-LINK.
It is possible to connect a maximum of 8 units to one group.
Control of Master/
Slave group
(Module Control)
•
Since this function is optional, it is necessary to make the settings for the enabling of this function at the time
(Option)
of local installation.
•
An exclusive controller is not required, but optional parts may become necessary depending on the structure
of the local system.
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SMGB0097 rev.0 - 07/2015
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Description
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