Hitachi RAS-18SH3 User Manual (English)

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Questions and Answers:

K
Kathleen HoltAug 11, 2025
Why is my Hitachi RAS-18SH3 filter cleaning not starting?
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  Frances Thompson MDAug 11, 2025
  The filter cleaning operation might not start due to several reasons. In basic cooling operation, it won't start even if you press the (MANUAL CLEAN) button. Also, it won't restart during or within 5 minutes after a cleaning operation to protect the device. Check if 'filter cleaning operation prohibited' is set and return to the filter cleaning operation setting. Ensure that the micro mesh stainless filter, dust catcher, filter cleaning wiper, and wiper cover are correctly installed. Lastly, filter cleaning is skipped if the unit is stopped by the Sleep Timer or Off Timer, but it will occur approximately once a week.
C
Carrie SkinnerAug 21, 2025
What to do if my Hitachi RAS-18SH3 Air Conditioner cleaning unit stops halfway?
- S
  Sharon LoweAug 21, 2025
  If the cleaning unit stops halfway, ensure that after filter cleaning wiper maintenance, the cleaning unit is returned to the right end part using the remote controller. Also, check if the micro mesh stainless filter, dust catcher, filter cleaning wiper, and wiper cover are correctly installed. The (CLEAN) indicator will light for 4 seconds and then turn off for 1 second if there is a problem.
A
Ashley BradyAug 30, 2025
Why does my Hitachi RAS-18SH3 Air Conditioner make noise during filter cleaning?
- R
  Robert SimpsonAug 31, 2025
  During the filter cleaning operation, several noises are normal. A whirring motor noise comes from the cleaning unit's motor. A clapping noise is generated when the dust catcher collects dust or when it's turned over by the cleaning unit. Also, a sweeping sound occurs when the cleaning unit sweeps the dust.

Hitachi RAS-18SH3 Specifications

General

Type	Split System
Refrigerant	R410A
Compressor Type	Rotary
Power Supply	220-240V, 50Hz
Noise Level (Outdoor)	50 dB
Energy Efficiency Ratio (EER)	3.2
Noise Level (Indoor)	42 dB