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Fuji Electric Inverter Multi Air Conditioner - Wall Mounted Type

Models:

Refrigerant: R410A

Contents

This service manual provides detailed information for the Fuji Electric Inverter Multi Air Conditioner, Wall Mounted type. Key sections include:

  • Specifications
  • Outline and Dimensions
  • Error Contents
  • Refrigerant System Diagram
  • Circuit Diagram
  • Indoor PCB Circuit Diagram
  • Disassembly Illustration
  • Parts List
  • Standard Accessories

Specifications

TypeCOOL & HEAT
INDOOR UNITRSM-18LARSM-12LARSM-9LARSM-7LA
OUTDOOR UNITROM-24LA2
ELECTRICAL DATA (INDOOR UNIT)
RSM-18LARSM-12LARSM-9LARSM-7LA
COOLING CAPACITY(kW)5.23.52.72.2
HEATING CAPACITY(kW)6.04.03.22.6
MOISTURE REMOVAL(l/hr)2.21.61.21.0
AIR CIRCULATION-Hi(m³/hr)950530480430
ELECTRICAL DATA (OUTDOOR UNIT)
POWER SOURCE(V)230
FREQUENCY(Hz)50
COOLING CAPACITY (MAX)(kW)5.8 (7.8)
HEATING CAPACITY (MAX)(kW)6.4 (9.0)
RUNNING CURRENT (MAX)COOLING (A)7.6 (12.2)
HEATING (A)7.2 (12.2)
INPUT WATTS (MAX)COOLING (kW)1.73 (2.77)
HEATING (kW)1.64 (2.77)
E.E.R.COOLING (kW/kW)3.35
HEATING (kW/kW)3.90
COMPRESSOR
TYPEHermetic type, Inverter, 4 poles, Three phase, DC motor, Rotary
DISCRIMINATIONTNB 220 FPCM
REFRIGERANT(g)1,900
FAN MOTOR
POWER SOURCE(V)230 - 240
DISCRIMINATIONMFA-30HTTMFA-40GRMFA-40GRMFA-40GR
INDOOR UNITHI(r.p.m.)1,160 - 1,1801,310 - 1,3101,200 - 1,2001,000 - 1,000
MED(r.p.m.)1,000 - 1,0201,260 - 1,2601,100 - 1,100900 - 900
LO(r.p.m.)850 - 8701,190 - 1,1901,000 - 1,000850 - 850
QUIET(r.p.m.)800 - 8201,100 - 1,100940 - 940800 - 800
OUTDOOR UNIT(r.p.m.)780 - 790
DIMENSIONS
INDOOR UNITH x W x D(mm)320 x 1,120 x 220257 x 808 x 187
OUTDOOR UNITH x W x D(mm)650 x 830 x 320
WEIGHT
INDOOR UNITGROSS / NET(kg)22 / 1610 / 8
OUTDOOR UNITGROSS / NET(kg)62 / 56
NOISE LEVEL
INDOOR UNITHI(dB)43383634
LO(dB)32332929
OUTDOOR UNITCOOLING (dB)49
HEATING (dB)50

Outline and Dimensions

Indoor Unit

Model: RSM-18LA

Diagram shows an indoor unit with dimensions: Height 321 mm, Width 1,120 mm, Depth 224 mm. Key features like air intake grille and louvers are visible. Mounting bracket dimensions are also indicated.

Models: RSM-12LA, RSM-9LA, RSM-7LA

Diagram shows a different indoor unit profile with dimensions: Height 257 mm, Width 808 mm, Depth 187 mm.

Outdoor Unit

Model: ROM-LA2

Diagram shows an outdoor unit with dimensions: Height 650 mm, Width 830 mm, Depth 350 mm. Views include front, side, and bottom. The bottom view indicates air flow direction and pipe connections.

Error Contents - Indoor Unit

This section details error codes indicated by the operation lamp (red) and timer lamp (green) for indoor units. Errors are categorized into 'Large division indication' and 'Small division indication'.

RSM-18LA Errors

Error ContentsRed lampGreen lampOrange lamp
Heat exchanger thermistor error (outdoor unit)○● (3 times)---
Outdoor temperature thermistor error (outdoor unit)○● (4 times)---
Discharge thermistor error (outdoor unit)○● (5 times)---
Compressor thermistor error (outdoor unit)○● (8 times)---
Pressure switch error (outdoor unit)○● (9 times)---
IPM error (inverter unit)○● (10 times)---
Compressor loter location error (inverter unit)○● (13 times)---
2 way valve thermistor error (outdoor unit)○○● (2 times)
3 way valve thermistor error (outdoor unit)○○● (3 times)
Capacity error of connecting indoor unit○○● (4 times)
Serial reverse transmission error○○● (5 times)
Thermistor error (room temp.) (indoor unit)○● (2 times)○
Thermistor error (heat exchanger) (indoor unit)○● (3 times)○ (O)
Serial order transmission error○● (5 times)○ (O)
Fan motor error (indoor unit)○● (6 times)---

RSM-12LA, RSM-9LA, RSM-7LA Errors

Errors are indicated by 'Large division indication' (primary) and 'Small division indication' (secondary, accessed via 'Test run' button).

Large division indicationSmall division indication
Error ContentsLED indicationError ContentsLED indication
Thermistor error (indoor unit)Red lamp● (2 times)Thermistor error (room temp.)Red lamp● (2 times)
Green lampGreen lamp
Control unit error (indoor unit)Red lamp● (4 times)Thermistor error (heat exchanger)Red lamp● (3 times)
Green lampGreen lamp
Serial errorRed lamp● (5 times)MANUAL AUTO button errorRed lamp● (2 times)
Green lampGreen lamp
Fan motor error (indoor unit)Red lamp● (6 times)Power source Hz decision errorRed lamp● (4 times)
Green lampGreen lamp
Thermistor error (outdoor unit)Red lamp○Serial reverse transmission errorRed lamp● (2 times)
Green lampGreen lamp
Pressure switch errorRed lamp● (3 times)Serial order transmission errorRed lamp● (3 times)
Green lampGreen lamp
Control unit error (outdoor unit)Red lamp● (4 times)Lock errorRed lamp● (2 times)
Green lampGreen lamp
Inverter errorRed lamp● (5 times)r.p.m errorRed lamp● (3 times)
Green lampGreen lamp
Discharge thermistor errorRed lamp○Green lamp● (2 times)
Heat exchanger thermistor errorRed lamp○Green lamp● (4 times)
Outdoor temperature thermistor errorRed lamp○Green lamp● (6 times)
Compressor thermistor errorRed lamp○Green lamp● (8 times)
2 way valve thermistor errorRed lamp○Green lamp● (9 times)
3 way valve thermistor errorRed lamp○Green lamp● (10 times)
Pressure switch errorRed lamp○Green lamp● (2 times)
Capacity error of connecting indoor unitRed lamp○Green lamp● (2 times)
Outdoor unit IPM errorRed lamp○Green lamp● (4 times)
Compressor loter location errorRed lamp○Green lamp● (2 times)

Thermistor Resistance Values (Indoor Unit Side)

1) Room Temperature Thermistor (THIA)

Room temperature (°C)02.557.51012.51517.52022.52527.530
Resistance value (kΩ)33.629.525.922.820.217.915.814.112.511.210.09.08.0
Room temperature (°C)32.53537.54042.54547.550
Resistance value (kΩ)7.26.55.95.34.84.33.93.6

2) Indoor Heat Exchanger Temperature Thermistor (THHM, THHI)

Heat exchanger temperature (°C)02.557.51012.51517.52022.52527.530
Resistance value (kΩ)176.0153.5134.2117.6103.391.080.371.062.955.949.744.339.6
Heat exchanger temperature (°C)32.53537.54042.54547.55052.55557.560
Resistance value (kΩ)35.431.728.525.623.120.818.817.115.514.112.811.6

Refrigerant System Diagram

Diagram illustrating the refrigerant flow. Key components include: Compressor, Accumulator, 4-way valve, Receiver tank, Strainers, Electric Expansion Valves (EVA, EVB), 2-way valve, 3-way valve, and Heat Exchangers (Outdoor and Indoor units). Arrows indicate flow direction for HEAT and COOL modes.

Circuit Diagram

Detailed electrical circuit diagrams for the Indoor Unit (Models: RSM-18LA, RSM-7LA, RSM-9LA, RSM-12LA) and the Outdoor Unit (Model: ROM-24LA2). These diagrams show connections between components such as the control board, fan motor, compressor, thermistors, power supply, and various connectors.

Indoor PCB Circuit Diagram

Detailed schematic of the Indoor Printed Circuit Board (PCB) for models RSM-7LA, RSM-9LA, and RSM-12LA. It shows the layout and connections of components on the PCB, including the power transformer, power supply PCB, controller PCB assembly, and indicator PCB.

Outdoor PCB Circuit Diagram

Detailed schematic of the Outdoor Printed Circuit Board (PCB) for model ROM-24LA2. It illustrates the complex circuitry, including the controller PCB assembly, power transformer, fan motor, and various control components.

Disassembly Illustration

These illustrations provide step-by-step visual guides for disassembling the indoor and outdoor units. They show the arrangement of parts and how they are connected, aiding in maintenance and repair.

Indoor Unit Disassembly (Model: RSM-18LA)

Illustrations show the breakdown of the indoor unit, starting with the outer casing and progressing to internal components like the fan, louvers, evaporator, control board, and motor assemblies. Key parts are numbered for reference.

Indoor Unit Disassembly (Models: RSM-12LA, RSM-9LA, RSM-7LA)

Illustrations show the disassembly of these indoor models, detailing the removal of front panels, filters, fan motors, and other internal components.

Outdoor Unit Disassembly (Model: ROM-24LA2)

Illustrations detail the disassembly of the outdoor unit, showing the removal of the front panel, fan guard, condenser, compressor, and associated piping and electrical components.

Parts List

Indoor Unit Parts List (RSM-18LA)

Ref. No.DescriptionPart No.Ord. Q'ty
34Capacitor (Fan Motor)9704305060
40Water Seal Plate9369684005
45Bracket (Evaporator)9369372001
61Decoration Plate9367731015
63Front Panel9368540012
69Louver9368560010
69-1Louver Base-A9368558017
69-2Louver Base-B9368559014
74Air Filter9368552008
92Link Holder9368563004
108Base Assy9369209017
122Bearing Assy9368574000
127Drain Hose9367695003
146Evaporator Assy9372102015
158Joint Pipe Assy9372461013
160Front Drain Pan (kit)9370932010
160-1Rear Drain Pan Assy9369201011
163-2Thermistor Spring-A313728262708
164Fan Motor Assy-IN9601388012
169Cross Flow Fan Assy9368586003
178-1Rubber (Motor)9368575007
199Step Motor9900020019
233Power Transformer9900069018
236Controller PCB Assy9704714091
240Remote Control Unit9371190112
321Flap9368544010
329Coupling Pipe Assy9369241000
338Motor Holder-A9368550004
338-1Motor Holder-B9368551001
338-2Motor Holder-C9368769000
385Indicator PCB Assy9702307011
401Wall Hook Bracket9368579005
408Louver Link9368562007
425Earth Plate9368580001
428Screw Cover9368576011
435Louver Spring9368613006
473Pipe Holder9368565008
473-1Cord Holder9368566005
506Louver Rod9368561017
514Control Box9368543006
522-1Sector Gear9368556006
522-2Pinion Gear9368557003
522-3Flap Spring9368612009
557Diffuser Spring9368587000
574-1Evaporator Support-R9368549008
574-2Evaporator Support-L9368548001
684Motor Base9368555009
707Display Cover9368564001
735Distributor Assy9371178004
743Remote Control Unit Case9305642014
759Intake Grill-F9368541057
764Drain Cap9367677009
815Terminal9306489106
846Relay G5NB-1A9701316014
855Cover Display9369264016
855-1Cover Display-B9369594014
855-2Cover Display-C9369683015
938Control Box Cover-R9369631009
942Control Box Cover9368611002
960Diffuser Assy9369346019
963Fan Guard9368588007
963-1Fan Guard Holder9368554002
998Bypass Pipe-A9369238000
999Bypass Pipe-B9369239007

Indoor Unit Parts List (RSM-12LA, RSM-9LA, RSM-7LA)

Ref. No.DescriptionPart No. (RSM-12LA)Part No. (RSM-9LA)Part No. (RSM-7LA)Ord. Q'ty
34Capacitor (Fan motor)990008906199000890619900089061
63Front Panel Assy931217221493121722149312172214
65Flow Control Panel-Z930605804393060580439306058043
69Louver-A930605502893060550289306055028
74Filter930544401493054440149305444014
108Base930975506293097550629309755062
109Casing930605202793060520279306052027
122Shaft Holder-B930306601093030660109303066010
127Drain Hose Assy930555002993055500299305550029
146Evaporator Assy937304401793085590369308559036
151Control Box933000701793300070179330007017
158Connecting Pipe Assy930641601093064160109306416010
164Fan Motor Assy-IN960117101096011710109601171010
169Cross-Flow Fan Assy930783601593078360159307836015
178Motor Cushion-M960130201896013020189601302018
184Thermistor Spring313728262708313728262708313728262708
196Clamp SKB-150313035356905313035356905313035356905
233Power Transformer990002801599000280159900028015
236Controller PCB Assy9705289031 (EZ-00309HSE-C)9705289024 (EZ-00308HSE-C)9705289017 (EZ-00307HSE-C)
240Remote Control Unit937119017493711901749371190174
281BRACKET(PIPE)933001101493300110149330011014
283Bushing-A930352901093035290109303529010
323Louver-B930605602593060560259306056025
385Indicator PCB Assy970529601597052960159705296015
401Wall Hook Bracket930435800893043580089304358008
440Flow Control Panel-U930605704693060570469306057046
522-1Gear-A930606200293060620029306062002
523Gear Bracket930640700193064070019306407001
652-1Thermistor Holder Pipe313714262805313714262805313714262805
687Earth Terminal313681304205313681304205313681304205
759Intake Grille933000206793300020679330002067
764Drain Cap Assy930415000893041500089304150008
767-1Bottom Cover933000401693300040169330004016
777CLAMPER (GRILL)930675501093067550109306755010
815Terminal990004005599000400559900040055
850Window (Receiver)933000301993300030199330003019
872Indicator Case933000901193300090119330009011
873Lamp Cover933001401593300140159330014015
874Control Box Cover933000801493300080149330008014
875Power Supply PCB Assy970529401197052940119705294011
876Step Motor990013901899001390189900139018
962-1Guard Holder-L930667801293066780129306678012
962-2Guard Holder-R930667701593066770159306677015
963Fan Guard930575101393057510139305751013

Outdoor Unit Parts List (ROM-24LA2)

Ref. No.DescriptionPart No.Ord. Q'ty
2Fan Guard9371187013
5Front Panel9371924014
7Connecteor Cover (Cabinet)9366398004
12Base Assy9371920078
13-13-Way Valve9372205044
13-22-Way Valve9372204054
13-33-Way Valve9372205051
14Valve Cover9372796016
16Condenser Assy9372181096
26-1Compressor Cover A9373730019
26-2Compressor Cover B9373730026
29Separate Wall9372795019
31Controller PCB Assy9705285019
33Control Cover9372792018
39Propeller Fan Assy9366378013
41Motor Induct9601671046
45-1Motor Bracket9371929019
45-2Motor Bracket-Top9371931012
45-3Motor Bracket-Center9371930015
45-4Motor Bracket-Bottom9371932019
46Compressor Assy9373262015
64Side Panel L9371926018
65Side Panel R9371927015
85Valve Plate9371928036
108Rubber Seat (Comp)9358080009
109Terminal Cover (Comp)9373264019
260Receiver Tank Assy9373426011
273Strainer Assy9366602019
334Accumulator9368391003
335Accumulator Holder Rubber9354022010
343Solenoid9900165079
3444-Way Valve9900163013
345Joint Pipe (3Way) Assy9373729129
346Expansion Valve Assy9373729068
348Pressure Switch Assy9373729044
349Capirally Assy9373729211
361Accum Support Assy9372252017
527Protective Net9371934013
734Top Panel9372304013
Gasket (Comp)9373266013
Washer (Rubber) (Comp)9358078006
Compressor pressure switch9900186012
Compressor thermal switch9373263012
Thermistor Valve9900194017
Thermistor discharge9704219039
Heat exchanger thermistor9704220059
Thermistor outdoor9703516047
Thermistor heat sink9900195014
Special Nut M8 (Comp)9355091008
Condenser Sub Assy9372313121
Thermister Holder Pipe313714262805
Capacitor, Plastic9704305077
Clip (Cable)9352715006
Br Sheet9363708042
Relay9900117016

Inverter Assy Parts List

Ref. No.DescriptionPart No.Ord. Q'ty
31Controller PCB Assy ACTPM9705285019 9703457012
Capacitor, Elec9705387010
Capacitor, Plastic9704305077
Fuse0600086039
Terminal 8P9900203047
Fuse Holder0501454012
Terminal 2P9701971015

Standard Accessories

Indoor Unit Accessories

Models: RSM-12LA, RSM-9LA, RSM-7LA

Name and ShapePart No.
Wall hook bracket9304358008
Wall cap-B313714296205
Remote control unit9371190174 (AR-JW17)
Battery (penlight)0600185534
Remote control unit holder9305642014
Cloth tape9308117007
Tapping screw (big) (φ4 x 20)301141164200
Tapping screw (small) (φ3 x 12)0700019036
Air cleaning filterDEODRANT FILTER 9310441015
ELECTRIC FILTER 9310442012
Air cleaning filter frame9305445011
Adapter D (1/2" → 3/8") 12.7 mm → 9.52 mm9Q model only 9370244007

Model: RSM-18LA

Name and ShapePart No.
Wall hook bracket9368579005
Remote control unit9371190112 (AR-JW11)
Battery (penlight)0600185534
Remote control unit holder9368847012
Tapping screw (big) (φ4 x 12)301171164129
Tapping screw (small) (φ3 x 12)301141533125
Air cleaning filterDEODORANT FILTER 9370527018
ELECTRIC FILTER 9370528015
Air cleaning filter frame9368568009

Outdoor Unit Accessories (Model: ROM-24LA2)

Name and ShapePart No.
Drain pipe9303029015
Drain cap313166024302
Adapter D (1/2" → 3/8") 12.7mm → 9.52mm9370244007
Models: ROM-24LA2, RSM-7LA, RSM-9LA, RSM-12LA, RSM-18LA, RSM Series Inverter Multi Air Conditioner, RSM Series, Inverter Multi Air Conditioner, Multi Air Conditioner, Air Conditioner, Conditioner

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