Brand: HITACHI
Category: Air Conditioner
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for FSN2(M)(E)
Uploaded: Nov. 21, 2025, 8:25 p.m.
Manual Publish Date: 2010-10-01
Warranty Information
No specific warranty period is mentioned in the provided document sections.
This manual provides comprehensive information on the HITACHI FSN2(M)(E) Indoor Units System FREE Series & Complementary Systems. It covers general information, unit installation, piping work, refrigerant charge, electrical wiring, control systems, optional functions, test runs, troubleshooting, spare parts, servicing, electrical checks, and maintenance notes. It details procedures for various indoor unit types including 4-way cassette, compact 4-way cassette, 2-way cassette, ceiling, ducted, wall-mounted, floor type, and floor concealed. Specific sections address installation steps, component removal, cleaning procedures for indoor heat exchangers, and refrigerant collection for unit replacement. Safety symbols and precautions are also highlighted.
Troubleshooting and error codes
| Trouble | Cause | Remedy |
|---|---|---|
| Indoor unit does not operate. | No power supply. | Check the power supply. |
| Indoor unit PCB error. | Check the indoor unit PCB. | |
| Cooling or heating does not operate. | Outdoor unit error. | Check the outdoor unit. |
| Refrigerant leak. | Check for refrigerant leaks. | |
| Abnormal noise from indoor unit. | Fan motor issue. | Check the fan motor. |
| Vibration from installation. | Secure the unit properly. |