10 User interface
Installation and operation manual
13
FCAHG71~140HVEB
Split system air conditioners
4P535639-1B – 2019.01
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
10
User interface
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
This operation manual will give a non-exhaustive overview of the
main functions of the system.
For more information about the user interface, see the operation
manual of the installed user interface.
11
Before operation
WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
CAUTION
It is not good for your health to expose your body to the air
flow for a long time.
CAUTION
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
CAUTION
Do NOT operate the system when using a room
fumigation-type insecticide. Chemicals could collect in the
unit, and endanger the health of people who are
hypersensitive to chemicals.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
This operation manual is for the following systems with standard
control. Before initiating operation, contact your dealer for the
operation that corresponds to your system type and mark. If your
installation has a customised control system, ask your dealer for the
operation that corresponds to your system.
Operation modes:
▪ Heating and cooling (air to air).
▪ Fan only operation (air to air).
12
Operation
12.1
Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
In combination with R410A outdoor units
Outdoor units
Cooling
Heating
RZQG71~140
Outdoor
temperature
–15~50°C DB
–20~15.5°C WB
Indoor
temperature
12~28°C WB
10~27°C DB
RZQSG71~140
Outdoor
temperature
–15~46°C DB
–15~15.5°C WB
Indoor
temperature
14~28°C WB
10~27°C DB
Indoor humidity
≤80%
(a)
In combination with R32 outdoor units
Cooling
Heating
Outdoor temperature
–20~52°C DB
–20~24°C DB
–20~18°C WB
Indoor temperature
17~38°C DB
12~28°C WB
10~27°C DB
Indoor humidity
≤80%
(a)
(a)
To avoid condensation and water dripping out of the unit. If
the temperature or the humidity is beyond these conditions,
safety devices may be put in action and the air conditioner
may not operate.
12.2
Operating the system
12.2.1
About operating the system
▪ To protect the unit, turn on the main power switch 6 hours before
operation.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
12.2.2
About cooling, heating, fan only, and
automatic operation
▪ The air flow rate may adjust itself depending on the room
temperature or the fan may stop immediately. This is not a
malfunction.
12.2.3
About the heating operation
It may take longer to reach the set temperature for general heating
operation than for cooling operation.
The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.
Defrost operation
In heating operation, freezing of the outdoor unit's air cooled coil
increases over time, restricting the energy transfer to the outdoor
unit's coil. Heating capability decreases and the system needs to go
into defrost operation to be able to remove frost from the outdoor
unit’s coil. During defrost operation the heating capacity on the
indoor unit side will temporarily drop until defrosting is completed.
After defrosting, the unit will regain its full heating capacity.
The indoor unit will stop fan operation, the refrigerant cycle will
reverse and energy from inside the building will be used to defrost
the outdoor unit coil.
