Hitachi RAC-18WSC Instruction Manual page 44

TROUBLESHOOTING (continued)
PLEASE CHECK THE FOLLOWING BEFORE SERVICE
Signal cannot be
received
(Remote controller
display is dim or
blank)
Operation does not
start
Does not cool well
Does not heat well
(CLEAN) indicator
blinks
• Do the batteries need replacement?
• Is the polarity of the inserted batteries correct?
• Is the fuse blown out or circuit breaker tripped?
• Is there a blackout? (Operation remains idle after a blackout.)
• Is the micro mesh stainless filter blocked with dust?
• Is the set temperature suitable?
• Have the horizontal air deflector been adjusted to the correct positions according to
the operation mode selected?
• Are the air inlets and air outlets of indoor and outdoor units blocked?
• Is the fan speed "LOW" or "SILENT"?
• Check "filter cleaning operation".
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