Hitachi RCI-3.0UFE1NH Installation & Maintenance Manual page 8

SAFETY PRECAUTIONS
Operating condition
The protective device may stop if it is operated beyond allowed
temperature range.
If the air conditioner runs in "COOLING" or "DRY" mode with
door or window open for a long time when relative humidity is
above 85%, dew may drip down from the air outlet.
Features of protector
The protective device will work at following cases:
Turning off the appliance and restarting it at once or changing
mode during operation will take at least 3 minutes.
Features of HEATING mode
Preheating
At the beginning of HEATING operation, the airflow from indoor unit is discharged 2-5 minutes later.
Defrosting
During HEATING operation the appliance will defrost automatically to improve efficiency. This procedure usually lasts for
2-10 minutes. During defrosting, fans stop operation. After defrosting is completed, it returns to "HEATING" mode automatically.
It is hard to increase the room temperature when outdoor temperature is very low. lt might take longer time if the working
temperature range is not close to the operation limits.
Precautions for using R32 refrigerant
The basic installation work procedures are the same as the conventional refrigerant (R22 or R410A).
However, pay attention to the following points:
1 Transportation of equipment containing flammable refrigerants
Pay attention to the fact that additional transportation regulations may exist with respect to equipment containing flammable gas.
The maximum number of pieces of equipment or the configuration of the equipment permitted to be transported together will be
determined by the applicable transport regulations.
2 Equipment signs
Signs for similar appliances (containing flammable refrigerants) used in a work area generally are addressed by local regulations
and give the minimum requirements for the provision of safety and/or health signs for a work location. All required signs are to be
maintained and employers should ensure that employees receive suitable and sufficient instruction and training on the meaning
of appropriate safety signs and the actions that need to be taken in accordance with these signs.
The effectiveness of signs should not be diminished by too many signs being placed together. Any pictograms used should be as
simple as possible and contain only essential details.
3 Disposal of equipment containing flammable refrigerants
In compliance with national regulations.
4 Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer's instructions.
2 HO2019289HA
Noise pollution
Install the air conditioner at a place that can bear its weight and
ensure the quiet operation.
Inspection
After operating for a long time, the air conditioner should be
inspected for the following items:
• Overheat of the power supply cord and plug or even a burnt
smell.
• Abnormal operating sound or vibration.
• Water leakage from indoor unit.
• Electrification of metal cabinet.
Stop the air conditioner if any of the previous trouble occurs.
It is advisable to have a detailed inspection after using the
appliance for 5 years even if none of the above condition
occurs.
! WARNING