Brand: Fujitsu
Category: Air Conditioners
Document Type: Manual
Language: EN
Manual for ASU9RLF1
Uploaded: Nov. 21, 2025, 9:24 p.m.
Manual Publish Date: 2013-11-25
This service manual provides comprehensive information on the Fujitsu Split Type Room Air Conditioner, Wall Mounted Type, models ASU9RLF1 and ASU12RLF1. It details specifications, dimensions, refrigerant system diagrams, circuit diagrams, error detection codes for both indoor and outdoor units, and parts lists. The manual is intended for service technicians and includes detailed schematics and component breakdowns for maintenance and repair.
Troubleshooting and error codes
| Indoor unit lamps (green) | Indoor unit lamps (orange) | Wired remote control | Description | |
| (1) | (1) | ◇ | 11 | Serial communication error |
| (1) | (2) | ◇ | 12 | Wired remote control communication error |
| (1) | (5) | ◇ | 15 | Check run unfinished |
| (2) | (1) | ◇ | 21 | Unit number or Refrigerant circuit address setting error [Simultaneous Multi] |
| (2) | (2) | ◇ | 22 | Indoor unit capacity error |
| (2) | (3) | ◇ | 23 | Combination error |
| (2) | (4) | ◇ | 24 | •Connection unit number error (indoor unit) [Simultaneous Multi] |
| (2) | (7) | ◇ | 27 | Master unit, slave unit set-up error [Simultaneous Multi] |
| (3) | (2) | ◇ | 32 | Indoor unit PCB model information error |
| (3) | (5) | ◇ | 35 | Manual auto switch error |
| (4) | (1) | ◇ | 41 | Room temp. sensor error |
| (4) | (2) | ◇ | 42 | Indoor unit Heat Ex. Middle temp. sensor error |
| (5) | (1) | ◇ | 51 | Indoor unit fan motor error |
| (5) | (3) | ◇ | 53 | Drain pump error |
| (5) | (7) | ◇ | 57 | Damper error |
| (5) | (8) | ◇ | 58 | Intake grill error |
| (5) | (15) | SU | Indoor unit error | |
| (6) | (2) | 62 | Outdoor unit main PCB model information error or communication error | |
| (6) | (3) | ◇ | 63 | Inverter error |
| (6) | (4) | ◇ | 64 | Active filter error, PFC circuit error |
| (6) | (5) | ◇ | 65 | Trip terminal L error |
| Indoor unit lamps (green) | Indoor unit lamps (orange) | Wired remote control | Description | Indoor unit lamps (green) | Indoor unit lamps (orange) | Wired remote control | Description | ||
| (6) | (10) | ◇ | 6A | Display PCB microcomputers communication error | (7) | (1) | ◇ | 71 | Discharge temp. sensor error |
| (7) | (2) | ◇ | 72 | Compressor temp. sensor error | (7) | (3) | ◇ | 73 | Outdoor unit Heat Ex. liquid temp. sensor error |
| (7) | (4) | ◇ | 74 | Outdoor temp. sensor error | (7) | (5) | ◇ | 75 | Suction Gas temp. sensor error |
| (7) | (6) | ◇ | 76 | • 2-way valve temp. sensor error | (7) | (7) | ◇ | 77 | 3-way valve temp. sensor error |
| (8) | (2) | 82 | Heat sink temp. sensor error | (8) | (3) | ◇ | 83 | Sub-cool Heat Ex. gas inlet temp. sensor error | |
| (8) | (4) | ◇ | 84 | Sub-cool Heat Ex. gas outlet temp. sensor error | (8) | (6) | 86 | Liquid pipe temp. sensor error | |
| (9) | (4) | ◇ | 94 | Current sensor error | (9) | (5) | ◇ | 95 | • Discharge pressure sensor error |
| (9) | (7) | ◇ | 97 | • Suction pressure sensor error | (9) | (9) | ◇ | 99 | • High pressure switch error |
| (10) | (1) | ◇ | A1 | 4-way valve error | (10) | (3) | ◇ | A3 | Trip detection |
| (10) | (4) | ◇ | A4 | Discharge temp. error | (10) | (5) | ◇ | A5 | Compressor temp. error |
| (13) | (2) | ◇ | 12 | High pressure error | ◇ | J2 | Low pressure error | ||
| (13) | (2) | ◇ | J2 | Branch boxes error |
| OUTDOOR UNIT | ERROR | ||
| LED | on | Discharge temperature abnormal | |
| 0.5 second on / 0.5 second off | IPM overcurrent protection | ||
| 0.1 second on / 0.1 second off | Thermistor abnormal | ||
| 2.0 second on / 2.0 second off | CT abnormal | ||
| 0.1 second on / 2.0 second off | Compressor location abnormal | ||
| 5.0 second on / 5.0 second off | Fan abnormal |