Important Notice - Hitachi RAS-4FSNME1 Instruction Manual

SAFETY

2.2 IMPORTANT NOTICE

The supplementary information about the purchased products
is supplied in a CD-ROM, which can be found bundled with the
outdoor unit. In case that the CD-ROM is missing or it is not
readable, please contact your Hitachi dealer or distributor.
PLEASE READ THE MANUAL AND THE FILES ON THE
CD-ROM CAREFULLY BEFORE STARTING WORK ON THE
INSTALLATION OF THE AIR CONDITIONING SYSTEM. Failure
to observe the instructions for installation, use and operation
described in this documentation may result in operating failure
including potentially serious faults, or even the destruction of the
air conditioning system.
This manual should be considered as a permanent part of the
2.3 ADDITIONAL INFORMATION ABOUT SAFETY
!
D A N G E R
• Hitachi is not able to foresee all the circumstances which may
result in a potential danger.
• Do not pour water into the indoor or outdoor unit. These products
are equipped with electrical parts. If water contacts with electrical
components then it will cause a serious electrical shock.
• Do not handle or adjust the safety devices inside the indoor and
outdoor units. The handling or adjustment of these devices may
result in serious accident.
• Do not open the service cover or access the indoor or outdoor
units without disconnecting the main power supply.
• In case of fire Turn OFF the main switch, put out the fire at once
and contact your service contractor.
• This air conditioner is equipped with a high pressure vessel
under PED (Pressure Equipment Directive). The pressure
vessel has been designed and tested before shipment
according to PED. Also, in order to prevent the system from
an abnormal pressure, a high pressure switch, which needs
no field adjustment, is utilized in the refrigeration system.
Therefore, this air conditioner is protected from abnormal
pressures. However, if abnormally high pressure is applied to
the refrigeration cycle including the high pressure vessel(s),
it will result in serious injury or death due to explosion of
the pressure vessel. Do not apply a pressure higher than the
following pressure to the system, by modifying or changing the
high pressure switch.
• Do not handle, modify or change the high pressure switch in the
air conditioning unit. If abnormally high pressure is applied to the
elements in the air conditioning unit refrigerant cycle, including
the high pressure vessels, these could explode resulting in
serious injury or loss of life.
Location
High pressure switch
Accumulator Compressor
The label for the vessel under PED
are attached on the high pressure
vessel. The pressure vessel capacity
and vessel category are indicated on
the vessel.
Start-up and Operation: Check to ensure that all the stop
valves are fully opened and no obstacle exists at the inlet/outlet
sides before start-up and during the operation.
Maintenance: Periodically check the high pressure side
10 PMML0532 rev.1 - 12/2020
Structure
Contact point
Pressure detected
Connected to the electrical wire
The high pressure switch is indicated
on the electrical wiring diagram in the
outdoor unit as HPS connected to printed
circuit board (PCB) in the outdoor unit.
air conditioner. This manual gives a common description and
information for this air conditioner which you operate as well as
for other models.
Refer to the models codification to confirm the main
characteristics of your system.
Verify, in accordance with the manuals which appear in the
outdoor and indoor units, that all the information required for the
correct installation of the system is included and correspond to
your air conditioner model. If this is not the case, contact your
distributor.
If you have any questions, contact your service contractor of
Hitachi.
pressure. If the pressure is higher than the maximum allowable
pressure, stop the system and clean the heat exchanger or
remove the cause.
Maximun allowable
Refrigerant
pressure (MPa)
R410A 4.15
!
C A U T I O N
• Check for refrigerant leakage in detail. It may hinder respiration as the
gas displaces the air in the room. Also harmful gases would occur if a
fire were being used in the room.
• Fit the indoor unit, the outdoor unit, the remote control and the cable
at a minimum of 3 meters away from sources where electromagnetic
waves radiate directly towards the electrical box and the components
of the unit, such as medical equipment. Electronic noise may result in
the incorrect operation of the unit.
• Do not use sprays, such as insecticides, varnishes or enamels or any
other inflammable gas within a meter of the system.
• If the circuit breaker or supply fuse of the unit comes on frequently,
stop the system and contact the service suppler.
• Do not place any foreign material (branches, sticks, etc.) in the air
inlet or outlet of the unit. These units are fitted with high speed fans
and contact with any object is dangerous.
• This appliance must be used only by adult and capable people,
having received the technical information or instructions to handle
this appliance properly and safely.
• The air conditioning system should only be installed, carry out
maintenance or inspection by qualified personnel, with the necessary
resources, tools and equipment, who are familiar with the safety
procedures required to successfully carry out the installation.
• Children should be supervised to ensure that they do not play with
the appliance.
• This air conditioner has been designed for standard air conditioning
for human beings. For use in other applications, please contact your
Hitachi dealer or service contractor.
?
N O T E
• The air in the room should be renewed and the room ventilated every
3 or 4 hours.
• The system fitter and specialist shall provide anti-leak safety in
accordance with local regulations.
High pressure switch
cut-out value (MPa)
4.00 ~ 4.10