7 Maintenance and service
Installation and operation manual
9
FXSN50~112A2VEB
CO
₂
Conveni-Pack: indoor unit
4P602815-1F – 2021.07
6.2.2
Special heating operation modes
Operation
Description
Defrost
To prevent a loss of heating capacity due to frost
accumulation in the outdoor unit, the system will
automatically switch to defrost operation.
During defrost operation, the indoor unit fan will
stop operation, and the following icon will appear on
the home screen:
In order to protect the system, cold air may come
from the indoor unit when the defrost operation
starts on the outdoor unit side.
The system will resume normal operation after
approximately 6 to 8 minutes.
Hot start
During hot start, the indoor unit fan will stop
operation, and the following icon will appear on the
home screen:
6.3
To operate the system
INFORMATION
For setting of the operation mode or other settings, see the
reference guide or operation manual of the user interface.
7
Maintenance and service
7.1
Precautions for maintenance and
service
WARNING:
System contains refrigerant
under very high pressure.
The system MUST be serviced by qualified persons ONLY.
NOTICE
Maintenance MUST be done by an authorised installer or
service agent.
We recommend performing maintenance at least once a
year. However, applicable legislation might require shorter
maintenance intervals.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. When the fan is rotating at high speed, it will
cause injury.
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work. However, as
end user, you may clean the air filter, suction grille, air
outlet and outside panels.
WARNING
NEVER replace a fuse with a fuse of a wrong ampere
ratings or other wires when a fuse blows out. Use of wire
or copper wire may cause the unit to break down or cause
a fire.
CAUTION
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
CAUTION
Before accessing terminal devices, make sure to interrupt
all power supply.
DANGER: RISK OF ELECTROCUTION
To clean the air conditioner or air filter, be sure to stop
operation and turn all power supplies OFF. Otherwise, an
electrical shock and injury may result.
WARNING
Be careful with ladders when working in high places.
7.2
Cleaning the air filter and air outlet
7.2.1
To clean the air outlet
WARNING
Do NOT let the indoor unit get wet.
Possible
consequence:
Electrical shock or fire.
NOTICE
▪ Do NOT use gasoline, benzene, thinner polishing
powder or liquid insecticide.
Possible consequence:
Discoloration and deformation.
▪ Do NOT use water or air of 50°C or higher.
Possible
consequence:
Discoloration and deformation.
Clean with a soft cloth. If it is difficult to remove stains, use water or
a neutral detergent.
7.2.2
To clean the air filter
When to clean the air filter:
▪ Rule of thumb: Clean every 6 months. If the air in the room is
extremely contaminated, increase the cleaning frequency.
▪ Depending on the settings, the user interface can display the
"Time to clean filter"
notification. Clean the air filter when the
notification is displayed.
▪ If the dirt becomes impossible to clean, change the air filter
(= optional equipment).
How to clean the air filter:
NOTICE
Do NOT use water of 50°C or higher.
Possible
consequence:
Discoloration and deformation.
1
Remove the air filter.
Pull its cloth upward (in case of rear
suction) or backward (in case of bottom suction).
rear suction
bottom suction
