13
INSTALLATION AND OPERATION MANUAL
ENGLISH
PART I- OPERATION
1  SAFETY SUMMARY 
  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. If this is not the case, contact 
your distributor.
  HITACHI pursues a policy of continuing improvement  
in design and performance of products. The right is therefore 
reserved to vary specications without notice.
  HITACHI cannot anticipate every possible circumstance that might 
involve a potential hazard.
  This air conditioner has been designed for standard air conditioning 
for human beings only. Do not use this for other purposes such as for 
drying clothes, refrigerating foods or for any other cooling o heating 
process.
  No part of this manual may be reproduced without written 
permission.
  If you have any questions, contact your service contractor of 
HITACHI.
  This manual gives a common description and information for this air 
conditioner which you operate as well as for other models.
  Check and make sure that the explanations of each part of this 
manual correspond to your air conditioner model. 
  Refer to the models codication (page 1) to conrm the main 
characteristics of your system.
  Signal words (DANGER, WARNING and CAUTION) are used to 
identify levels of hazard seriousness. Denitions for identifying 
hazard levels are provided below with their respective signal words.
  It is assumed that this unit will be operated and serviced by English 
speaking people. If this is not the case, the customer should add 
safety, caution and operating signs in the native language of the 
personal.
  This air conditioner has been designed for the following temperature. 
Operate the air conditioner within this range: 
Temperature
Maximum Minimum
Cooling 
Mode
Indoor 32°C DB/23°C WB 21°C DB/15°C WB
Outdoor
ES Series: 43 °C DB
IVX Series: 46 ºC DB
-5 °C DB
Heating  
Mode 
Indoor 27 °C DB 15 °C DB
Outdoor 15 °C WB
ES Series: -10 °C WB
IVX Series: -20 °C WB
DB: Dry Bulb Temperature
WB: Wet Bulb Temperature
  These operations modes are controlled by the remote control switch.
  This manual should be considered as a permanent  
part of the air conditioner. This manual gives a common description 
and information for this air conditioner which you operate as well as 
for other models.
DANGER:
Pressure Vessel and Safety Device: 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 eld 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. 
 CAUTION: 
This unit is designed for commercial and light industrial 
application. If installed in house hold appliance, it could cause 
electromagnetic interference.
 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 touch or adjust safety devices inside the indoor or outdoor 
units. If these devices are touched or adjusted, it may cause a 
serious accident.
Do not open the service cover or access the indoor or outdoor 
units without disconnecting the main power supply.
In case of re Turn OFF the main switch, put out the re at once 
and contact your service contractor.
 CAUTION:
Refrigerant leakage can cause difculty with breathing due to 
insufcient air.
This appliance must be used only by adult and capable
people, having received the technical information or
instructions to handle properly and safely this appliance.
Children should be supervised to ensure that they do not
play with the appliance.
 WARNING:
Do not use any sprays such as insecticide, lacquer, hair spray or 
other ammable gases within approximately one (1) meter from 
the system.
If circuit breaker or fuse is often activated, stop the system and 
contact your service contractor.
Do not make service or inspections tasks by yourself. This works 
must be performed by qualied service person.
Do not put any strange material (sticks, etc...) into the air inlet 
and outlet. These units have high speed rotating fans and it is 
dangerous that any object touches them.
 NOTE:
It is recommended to ventilate the room every 3 or4 hours.
2  IMPORTANT NOTICE 
PMML0197_r0_04-10.indb   13 08/07/2010   9:20:07