Regular Inspection; After Sales Service And Warranty - Hitachi RAF-25PXA Instruction Manual

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY. CONTACT YOUR
SALES AGENT SHOULD YOU NEED ANY HELP.
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AFTER SALES SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING
CONDITION
If the remote controller is not
transmitting a signal.
(Remote controller display is
dim or blank.)
When it does not operate.
When it does not cool well.
When it does not heat well.
■ The following phenomena do not indicate unit failure.
During heating, the operation indicator
blinks and air blow stops
Hissing or fizzy sounds
Squeaking noise
Rustling noise
Clicking noise
Perking noise
Changing operation noise
Mist emission
Check to see if the unit's earth line has been connected
correctly.
If the earth line is disconnected or faulty, unit failure or electric
WARNING
shock hazard may result.
Check to see if the mounting frame has rusted excessively
or if the outdoor unit has tilted or become unstable.
WARNING
It could collapse or fall, causing injury.
CHECK THE FOLLOWING POINTS
• Do the batteries need replacement?
• Is the polarity of the inserted batteries correct?
• Is the fuse all right?
• Is the voltage extremely high or low?
• Is the circuit breaker "ON"?
• Is the setting of operation mode different from other indoor units?
• Is the air filter blocked with dust?
• Is the set temperature suitable?
• Have the top and bottom air deflectors been adjusted to their correct
positions according to the operation mode selected?
• Are the air inlets or air outlets of indoor and outdoor units blocked?
• Is the fan speed "LOW" or "SILENT"?
<Operation start>
The unit is preparing to blow warm air. Please wait.
<In operation>
The outdoor unit is defrosting. Please wait.
Refrigerant flow noise in the pipe or valve sound generated when flow rate is
adjusted.
Noise generated when the unit expands or contracts due to temperature
changes.
Noise generated with the indoor unit fan's rpm changing such as operation start
times.
Noise of the motorized valve when the unit is switched on.
Noise of the ventilation fan sucking in air present in the drain hose and blowing out
dehumidifying water that had accumulated in the condensed water collector. For
details, consult your sales agent.
Operation noise changes due to power variations according to room temperature
changes.
Mist is generated as the air within the room is suddenly cooled by conditioned air.
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