Hitachi RPFC-3.0UFE1NH Installation & Maintenance Manual page 16

OPERATION MANUAL
4 This is Not Abnormal
• Smell from indoor unit
Smell adheres on indoor unit after a long period of time. Clean the air filter and panels or allow a good ventilation.
• Sound from Deforming Parts
During system starting or stopping, a sound might be heard. However, this is due to thermal deformation of plastic parts. It is not
abnormal.
• Steam from Outdoor Heat Exchanger
During defrosting operation, ice on the outdoor heat exchanger is melted, resulting in steam.
• Dew on Air Panel
When the cooling operation continues for a long period of time under high humidity conditions (higher than 27ºC / 80%R.H.), dew
can form on the air panel.
• Refrigerant Flow Sound
While the system is being started or stopped, sound from the refrigerant flow may be heard.
5 Filter removing and installing
! CAUTION
Turn off the main power switch before taking the filter out.
Operations should be performed by professional staff, or under the supervision and guidance of professionals.
• Removing filter from air return grille
Take out the air filter according the following steps:
Step1: Slide the air return grille holding knobs (4 places), then remove the holding screws (4 places) as shown by the arrow
mark.
Step2: Open the air return grille at an angle of more than 45°and take out the air filter from the air inlet grille by holding the air
grille and lifting the air filter after detaching the filter from the hinges.
• Installingthe filter
Step1: Insert the filter to the grille and aim the bottom hooks. Pay attention to grille as top hooks are locked.
Step2: Fix screws.
Step3: The inlet grille is attached.
10 HO2019291HA
Screw
Top hook
Bottom hook