Hitachi CSNET MANAGER XT Installations- Und Betriebshandbuch Seite 60

Operation and configuration of packaged units
• TSet Limits:
- USERMAX: Maximum Setting temperature. If the selected temperature is higher, CSNET will use USERMAX as the
value for the Setting temperature, changing this value as soon as the operation mode changes.
Š Pre set adjustment: +25°C.
Š 1°C steps.
Š 17°C... 30°C margin.
- USERMIN: Minimum Setting temperature. If the selected temperature is lower, CSNET will use USERMIN as the value
for the Setting temperature, changing this value as soon as the operation mode changes.
Š Pre set adjustment: +20°C.
Š 1°C steps.
Š 17°C... 30°C margin.
After adjust previously parameters, if unit is working in Auto Cool/Heat mode, it will be displayed on the status zone which option is
currently doing.
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Considerations for the use of the Auto Cool/Heat mode
When the Auto Cool/Heat is used, the difference of 4°C programmed in the heating mode of each indoor unit should be cancelled
in all of them. Otherwise, there may be a conflict between the system program and the CSNET program. (See the Service Manual of
the indoor unit for details about cancelling this misadjustment using the optional function b1). However, if an optional remote sensor
has been fitted in the rooms (one per indoor unit), the misadjustment is cancelled automatically (not available in the FSGM RPK
series).
If an indoor unit is defined by CSNET in Auto Cool/Heat mode, all the indoor units connected to the same outdoor Set-Free FS
(or to the same CH Box in Set-Free FX systems) will change to the Auto Cool/Heat mode. This means that, for example if one of
the indoor units was adjusted for heating at 17ºC and the outdoor Set-Free FS or Set-Free FX CH Box changes to cooling mode,
according to the calculation of CSNET, this indoor unit will begin to cool when it reaches 17°C. To prevent this kind of situation from
occurring, take care when programming the timer.
For all the indoor units connected to a single outdoor Set-Free FS or Set-Free FX CH Box, the starting time in the morning for the
first unit (see "4.5 Timer") should serve as the reference time and conditions for all the other units in the same system. At night, the
last indoor unit to change will be the reference point for all the other units of the system in question.
If a user selects a different mode with the remote control (PC-P1HE type) when the local mode is being used, it will later return
to the mode calculated by CSNET. Thus it is not recommended to use the mode selector of the remote controls during the Auto
Cool/Heat operation of CSNET in local mode. The temperature should only be regulated, if necessary, with the  (up) or  (down)
buttons. CSNET will then select and adjust the necessary (and possible) mode by outdoor unit (also in the LCD screen of the PC-
P1HE remote control).
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C A U T I O N
In case of configuring Auto Cool/Heat and Fan stop heating during thermo off functions, it should be ensured that only one input data THM4 or RCS
Sensor has been configured on both functions.
54 PMML0303A rev.2 - 02/2015