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Ceiling cassette indoor unit

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Hitachi Ceiling cassette indoor unit 4-Way Cassette Compact Type / RAI Cassette

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Hitachi Cassette Indoor Units Ceiling cassette indoor unit Repair, maintenance, and replacement planning
Hitachi 4-Way Cassette Compact Type / RAI Cassette product image

Technical Specifications

Product Specs

  • Brand: Hitachi
  • Representative series: 4-Way Cassette Compact Type / RAI Cassette
  • Equipment type: ceiling cassette indoor unit
  • Airflow style: four-way ceiling discharge
  • Ceiling profile: compact 600 mm by 600 mm class cassette design
  • Sound level: official product material lists silent operation down to 24.5 dB(A)
  • Drain lift: official product material lists drainpipe height up to 850 mm
  • Downward cooling reach: official product material lists a 4.6 m range
  • System compatibility: used in VRF and split indoor-unit applications depending on series
  • Service focus: condensate pump/drain checks, airflow balance, filter cleaning, and control communication
  • Model or series: 4-Way Cassette Compact Type / RAI Cassette
  • Product group: Cassette Indoor Units
  • System role: Ductless or mini-split system equipment
  • Application: Residential, light-commercial, or zone-control comfort applications
  • Compatibility check: Match with compatible outdoor equipment, controls, airflow, voltage, and capacity before service or replacement.
  • Verified source: hitachiaircon.com

Useful troubleshooting details

  • Confirm the exact Cassette Indoor Units model number, serial number, capacity, voltage, refrigerant or fuel type, controls, and matched equipment.
  • Share current symptoms, alerts or error codes, recent maintenance, access notes, and whether the issue is urgent or planned.
  • For replacement planning, note comfort goals, existing equipment age, and any heat-pump, electrification, or rebate-related questions.

Service planning

How GreenFlow handles 4-Way Cassette Compact Type / RAI Cassette requests

1

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

2

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

3

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

4

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

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Our Happy Customers

Sharad W.

Green Flow and the people who work there are terrific. Vlad and Andre are excellent. Andre was very helpful. He was punctual, respectful, efficient and knowledgeable. He did not try to sell me something I didn’t need ( as others have done before). I was charged $99 which...

Melissa S.

The repair person came quickly and was super efficient and polite, and showed me what to do next time. He gave my dog a quick pay and was off again.

Randy J.

Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

Anna F.

They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.

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