Initial Troubleshooting; Troubleshooting; This Is Not Abnormal; Not Cooling Or Heating Well - Hitachi FSG1 Series Technical Catalogue

TROUBLESHOOTING

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18.1 INITIAL TROUBLESHOOTING

18.1.1 THIS IS NOT ABNORMAL

n Smells 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.
n Sound from Deforming Parts
During system starting or stopping, an abrading sound
might be heard. However, this is due to thermal
deformation of plastic parts. It is not abnormal.
n Steam from Outdoor Heat Exchanger
During defrosting operation, ice on the outdoor heat
exchanger is melted, resulting in making steam.
n Dew on Air Panel
When the cooling operation continues for a long period of
time under high humidity conditions (higher than 27°C
DB/80% R.H), dew can form on the air panel.
n Refrigerant Flow Sound
While the system is being started or stopped, sound from
the refrigerant flow may be heard.

18.1.2 NOT COOLING OR HEATING WELL

n Check for obstruction of air flow of the outside or inside
units.
n Check if too much heat source exists in the room.
n Check if the air filter is clogged with dust.
n Check to see if the doors or windows are opened or not.
n Check if the temperature condition is not within the
operation range.

18.1.3 NOT OPERATE

n Check for electrical wiring.
n Check for dip switch setting.
n Check whether the "SET TEMP" is set at the correct
temperature.
n In the case that "RUN" lamp on remote control switch is
flickering every 2 seconds, check for connection of
remote control line.
n In the case that "RUN" lamp flashes 5 times (5 seconds)
with unit number and alarm code displayed, refer to the
next item "18.2 Troubleshooting by Alarm Code" and the
"Service Manual".
n In the case that no alarm code is indicated and normal
operation is not available, refer to the "Service Manual"
because abnormality of some device is suspected.