4 OPERATION TIPS
4-1 Selectable Modes (for VRF system)
There are restrictions on the selectable modes depending on
the system configuration and operation status.
4-1-1
Heat recovery system
(a) When single indoor unit connected to RB unit
All the modes can be selected.
(b) When a master indoor unit is set in an RB group, only
the mode selected at the master indoor unit (*1) can be
used. (*1: “Fan” cannot be selected at the indoor unit
including the master indoor unit.)
(c) When a master indoor unit is not set in the RB Group,
refer to the following table.
Status
Selectable
Not selectable
Other indoor unit is in cool-
ing operation.
Cool, Dry Auto or Custom Auto,
Heat, Fan
Other indoor unit is in dehu-
midifying operation.
Cool, Dry Auto or Custom Auto,
Heat, Fan
Other indoor unit is in heat-
ing operation.
Heat
Auto or Custom Auto,
Cool, Dry, Fan
Other indoor unit is in anti
freeze operation.
Heat
Auto or Custom Auto,
Cool, Dry, Fan
4-1-2
When indoor units is connected for cooling
only in heat recovery system
(a)
Refer to the following table:
Status
Selectable
Not se-
lectable
At any time
Auto or Custom Auto,
Cool, Dry, Fan
Heat
4-1-3
RB priority connection in heat recovery system
(a) For indoor units or RB groups by RB priority connec-
tion, refer to the following table:
Status
Selectable
Not selectable
Cooling priority is set by
external input.
Cool, Dry Auto or Custom Auto,
Heat, Fan
Heating priority is set by
external input.
Heat
Auto or Custom Auto,
Cool, Dry, Fan
4-1-4
Heat pump system
(a)
Refer to the following table:
Status
Selectable
Not selectable
Other indoor unit is in cool-
ing operation.
Cool, Dry Auto or Custom Auto,
Heat, Fan
Other indoor unit is in dehu-
midifying operation.
Cool, Dry Auto or Custom Auto,
Heat, Fan
Other indoor unit is in heat-
ing operation.
Heat
Auto or Custom Auto,
Cool, Dry, Fan
Other indoor unit is in anti
freeze operation.
Heat
Auto or Custom Auto,
Cool, Dry, Fan
(b) When a master indoor unit is set in a refrigerant system,
only the mode selected at the master indoor unit (*2)
can be used. (*2: “Fan” cannot be selected at the indoor
unit including the master indoor unit.)
4-1-5
Outdoor unit priority connection in heat pump
system
(a)
Refer to the following table:
Status
Selectable
Not selectable
Cooling priority is set by
external input.
Cool, Dry Auto or Custom Auto,
Heat, Fan
Heating priority is set by
external input.
Heat
Auto or Custom Auto,
Cool, Dry, Fan
4-2
Verification screen when setting is
complete
The verification screen which is
displayed when a setting is com-
plete is displayed for approximately
3 seconds. When this screen is
touched, the display switches to
the next screen.
(Example of screen)
On Timer
Setting changed.
4-3
Settable temperature range
The settable temperature range by operation mode and
indoor unit setting is shown in the table below.
Cool/Dry*
18 to 30 °C (64 to 88 °F) or
20 to 30 °C (68 to 88 °F)
Heat
VRF system: 10 to 30 °C (48 to 88 °F)
Other system: 16 to 30 °C (60 to 88 °F)
Custom Auto Same as the above range, but there are tempera-
tures that cannot be set due to the deadband.
Auto*
18 to 30 °C (64 to 88 °F) or
20 to 30 °C (68 to 88 °F)
NOTE
* The lower limit of the setting temperature is different
depending on the place of use.
En-24
Summary of Contents for UTY-RNRGZ5
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