2.2  ADDITIONAL INFORMATION ABOUT SAFETY
! DANGER
•  Hitachi is not able to foresee all the circumstances which may 
result in a potential danger.
•  Do not pour water in the indoor or outdoor unit. These products 
are tted with electric components. If water comes into contact 
with electric components, this will cause a serious electric 
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 panel of the indoor and 
outdoor units without disconnecting the main supply.
•  In  the  event  of  re,  switch  off  the  mains,  put  out  the  re 
immediately and contact your service supplier.
•  Check that the earth cable is correctly connected.
•  Connect the unit to a circuit breaker of the specied capacity.
! CAUTION
•  Refrigerant leaks may hinder respiration as the gas displaces the air 
in the room. It is assumed that this heat pump air conditioner will be 
operated and serviced by English speaking people. If this is not the 
case, the customer should be add safety, caution and operating signs 
in the native language.
•  Fit the indoor unit, the outdoor unit, the remote control and the cable 
at a minimum of 3 metres away from sources of strong radiation from 
electromagnetic waves, such as medical equipment.
•  Do not use sprays, such as insecticides, varnishes or enamels or any 
other inammable gas within a metre 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 carry out maintenance or inspection work yourself. This work 
must be carried out by qualied service personnel with suitable tools 
and resources for the work.
•  Do not place any foreign material (branches, sticks, etc.) in the air 
inlet or outlet of the unit. These units are tted 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.
•  Children should be supervised to ensure that they do not play with 
the appliance.
•  Install the unit in a place not accessible by the general public.
? NOTE
•  The air in the room should be renewed and the room ventilated every 
3 or 4 hours.
•  The  system  tter  and  specialist  shall  provide  anti-leak  safety  in 
accordance with local regulations.
•  The installer and system specialist shall secure safety against the 
refrigerant leakage according to local regulations or standards. The 
following standards may be applicable, if local regulations are not 
available. International Organization for Standardization, ISO5149 or 
European Standard, EN378 or Japan Standard, KHKS0010.
•  Electrical wiring must comply with national and local regulations. 
Contact your local authority in regards to standards, rules, regulations, 
etc.
3  IMPORTANT NOTICE
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.
The air conditioning system should only be installed by qualied 
personnel, with the necessary resources, tools and equipment, 
who are familiar with the safety procedures required to 
successfully carry out the installation.
The supplementary information about the purchased products is 
available through de QR-Code printed in the front cover. In case 
that no access to the website or les are not readable, please 
contact your Hitachi dealer or distributor.
PLEASE READ THE MANUAL AND DOWNLOADED 
FILES THROUGHT THE QR-CODE CAREFULLY BEFORE 
STARTING TO WORK ON THE INSTALLATION. 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.
It is assumed that the air conditioning system will be installed 
and maintained by responsible personnel trained for the 
purpose. If this is not the case, the customer should include all 
the safety, caution and operating signs in the native language of 
the personnel responsible.
Do not install the unit in the following places, as this may lead to 
a re, deformities, rusting or faults:
•  Places where oil is present (including oil for machinery).
•  Places with a high concentration of sulphurous gas, such as 
spas.
•  Places where ammable gases may be generated or 
circulate.
•  Places with a saline, acidic or alkaline atmosphere.
Do not install the unit in places where silicon gas is present. Any 
silicon gas deposited on the surface of the heat exchanger will 
repel water. As a result, the condensate water will splash out 
of the collection tray and into the electrical box. Water leaks or 
electrical faults may eventually be caused.
Do not install the unit in a place where the current of expelled 
air directly aects animals or plants as they could be adversely 
aected.
There are detailed information about unit installation, service 
space, wiring diagrams, electrical connection, refrigerant charge,  
in the corresponding chapter, please read the corresponding 
chapter carefully before starting work on the installation.
IMPORTANT NOTICE
PMML0569 rev.2 - 07/20232