Mitsubishi Heavy Industries SCM71ZM-S1 User manual

Manual No.'17•SCM-T-225
TECHNICAL MANUAL
INVERTER MULTI-SPLIT SYSTEM
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
(OUTDOOR UNIT)
SCM71ZM-S1
80ZM-S1
(INDOOR UNIT)
Wall mounted type
SRK20ZSX-S
25ZSX-S
35ZSX-S
50ZSX-S
60ZSX-S
SRK20ZS-S
25ZS-S
35ZS-S
50ZS-S
Floor standing type
SRF25ZMX-S
35ZMX-S
50ZMX-S
SRF25ZMA-S
35ZMA-S
50ZMA-S
4 way ceiling cassette type
FDTC25VF
35VF
50VF
60VF
Ceiling concealed type
SRR25ZM-S
35ZM-S
50ZM-S
60ZM-S
Ceiling suspended type
FDEN50VF
FDE50VG
Duct connected Low/Middle static pressure type
FDUM50VF

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CONTENTS
1. OUTDOOR UNITS ......................................................................................... 7
1.1 Specifications ......................................................................................... 7
2. INDOOR UNITS ............................................................................................. 18
2.1 Specifications ......................................................................................... 18
(3) Ceiling concealed type (SRR)
(1) Wall mounted type (SRK) ...................................................................... 18
(2) Floor standing type (SRF) ..................................................................... 27
............................................................... 33
(1) Wall mounted type (SRK)
(4) 4 way ceiling cassette type (FDTC) ....................................................... 37
(5) Ceiling suspended type (FDEN, FDE) ................................................... 41
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 43
(5) Ceiling suspended type (FDEN, FDE) ................................................... 50
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 52
(5) Ceiling suspended type (FDEN, FDE) ................................................... 61
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 63
(2) Floor standing type (SRF) ..................................................................... 46
2.2 Exterior dimensions ............................................................................... 44
...................................................................... 44
1.2 Exterior dimensions ................................................................................ 9
1.3 Electrical wiring ...................................................................................... 10
1.4 Noise level .............................................................................................. 11
1.5 Application data ...................................................................................... 14
(3) Ceiling concealed type (SRR) ............................................................... 47
(4) 4 way ceiling cassette type (FDTC) ...................................................... 49
(1) Wall mounted type (SRK)
(2) Floor standing type (SRF) ..................................................................... 58
...................................................................... 56
(3) Ceiling concealed type (SRR) ............................................................... 59
(4) 4 way ceiling cassette type (FDTC) ....................................................... 60
(7) Remote control ...................................................................................... 53
2.3 Electrical wiring ..................................................................................... 56
(1) Wall mounted type (SRK)
(2) Floor standing type (SRF) ..................................................................... 69
...................................................................... 64
(3) Ceiling concealed type (SRR) ............................................................... 70
2.4 Noise level .............................................................................................. 64

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(4) 4 way ceiling cassette type (FDTC) ....................................................... 76
(5) Ceiling suspended type (FDEN, FDE) ................................................... 78
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 79
(5) Ceiling suspended type (FDEN, FDE) ...................................................108
(6) Duct connected Low/Middle static pressure type (FDUM) ....................116
2.6 Application data ..................................................................................... 82
2.5 Characteristics of fan ............................................................................ 80
(1) Wall mounted type (SRK)
5. TABLE OF INDOOR UNIT COMBINATIONS ..............................................123
(1) Model SCM71ZM-S1 ..............................................................................123
(2) Model SCM80ZM-S1 ..............................................................................129
...................................................................... 82
..................................................................... 94
............................................................... 98
6. SELECTION CHARTS .................................................................................137
.......................................................102
(2) Floor standing type (SRF)
(3) Ceiling concealed type (SRR)
(4) 4 way ceiling cassette type (FDTC)
3. PIPING SYSTEM ..........................................................................................121
4. RANGE OF USAGE & LIMITATIONS .........................................................122
7.1 SRK,SRF and SRR series ......................................................................138
7. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ................138
7.1.1 SRK-ZSX series ..................................................................................138
7.1.2 SRK-ZS series ....................................................................................148
7.1.3 SRF, SRR series ................................................................................158
7.2 FDTC, FDEN, FDE and FDUM series .....................................................170
...........................1757.2.3 Operation control function by the indoor control
7.2.2 Operation control function by the wired remote control .................172
7.2.1 Remote control (Option parts) ...........................................................170
(1) Auto operation .........................................................................................175
(2) Operations of functional items during cooling/heating ............................176
(4) Timer operation .......................................................................................177
(5) Remote control display during the operation stop ....................................178
(6) Hot start (Cold draft prevention at heating) ............................................178
(7) Hot keep ..................................................................................................178
(3) Dehumidifying (DRY) operation ..............................................................176
(8) Auto swing control (FDTC, FDEN, FDE only) ........................................179

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(1) Summary ................................................................................................192
(3) Defrost operation ...................................................................................193
(2) Operation of major functional components in heating mode ..................192
7.3.1 Outline of heating operation ..............................................................192
7.3 Outdoor units .........................................................................................192
........................................................................182
.................................................................................182
....................................................................183
...........................182
......................................183
.................................................................................184
.............................................................................184
.............184
.......185
(13) Drain motor (DM) control
(12) Drain pump control
(16) Heating overload protection
(14) Operation check/drain pump test run operation mode
(15) Cooling, dehumidifying (DRY) frost protection
(19) High ceiling control
(17) Anomalous fan motor
(18)
Plural unit control - Control of 16 units group by one remote control
(20)
Abnormal temperature thermistor (return air/indoor heat exchanger) broken wire/short-circuit detection
...............................189(24) Selection of cooling/heating external input function
.................................................................190(25) Fan control at heating startup
....................................................190(27) Return air temperature compensation
(26)
Room temperature detection temperature compensation during heating ..........190
.........................................185(21) External input/output control (CnT or CnTA)
..................................................181(11) Compressor inching prevention control
(22) Operation permission/prohibition ...........................................................187
(23) Temporary stop input .............................................................................189
.....................................................190
.........................................................190
................................................190
...........................................................190
.........................................................191
(28) High power operation (RC-EX3 only)
(31) Home leave mode (RC-EX3 only)
(29) Energy-saving operation (RC-EX3 only)
(30) Warm-up control (RC-EX3 only)
(32) Auto temp. setting (RC-EX3 only)
....................................................191(35) Auto fan speed control (RC-EX3 only)
.................................................................191(37) Peak-cut time (RC-EX3 only)
(36) IU overload alarm (RC-EX3 only) ...........................................................191
................................................191(33) Fan circulator operation (RC-EX3 only)
(34)
The operation judgment is executed every 5 minutes (RC-EX3 only) .....191
(10) Filter sign .................................................................................................181
(9) Thermostat operation ..............................................................................180

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.....................................201
(11) Current safe ............................................................................................199
(16) Serial signal transmission error protection .............................................201
(15) Regulation of outdoor air flow .................................................................201
(14) Discharge pipe sensor disconnection protection control ........................200
(13) Outdoor unit failure ................................................................................200
(12) Current cut .............................................................................................200
(17) Rotor lock ...............................................................................................201
(18) Outdoor fan motor protection ..................................................................201
(20) Outdoor unit fan control at overload .......................................................202
(19) Outdoor fan control at low outdoor temperature
8.1 SRK, SRF and SRR series ......................................................................203
8. MAINTENANCE DATA .................................................................................203
(1) Cautions .................................................................................................203
(2) Items to check before troubleshooting ....................................................203
...........203
(4) Troubleshooting procedure (If the air-conditioner runs)
(3)
Troubleshooting procedure (If the air-conditioner does not run at all)
.........................204
(5) Self-diagnosis table ................................................................................205
(6) Service mode (Trouble mode access function) ......................................206
.......................214(7) Inspection procedures corresponding to detail of trouble
(8)
Phenomenon observed after shortcircuit, wire breakage on sensor ..............219
(1) Cooling overload protective control ........................................................195
(10) Compressor overheat protection ............................................................199
(6) Heating low outdoor temperature protective control
...................................................................................198(8) Crankcase heater
...................................................................................198(9) Inching prevention
(7) Refrigeration cycle system protective control ........................................198
...............................197
.................................................................195
(4) Heating high pressure control .................................................................196
(5) Heating overload protective control ........................................................197
(3) Cooling low outdoor temperature protective control
(2) Cooling high pressure control
...............................196
(1) Summary ................................................................................................194
(2) Operation of major functional components in cooling mode ...................194
7.3.2 Outline of cooling operation ..............................................................194
7.3.3 Protective control function ...............................................................195

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10. COMPONENT REPLACEMENT ...................................................................284
11. CHECKING PROCEDURE ...........................................................................296
12.1 Wired remote control ............................................................................301
12.2 Wireless kit .............................................................................................314
12.3 Simple wired remote control (RCH-E3) ................................................338
12.4 Interface kit (SC-BIKN2-E) .....................................................................344
12.5 Superlink E board (SC-ADNA-E) ..........................................................348
12.6 Ceiling concealed type (SRR) option parts .........................................350
12.7 OA spacer (FDTC only) .........................................................................353
12.8 Duct joint (FDTC only) ...........................................................................357
12.9 Filter kit (FDUM only) ..............................................................................358
12. OPTION PARTS ............................................................................................301
9.
TABLE OF FUNCTIONS CONNECTED WIRED REMOTE CONTROL (RC-E5) .............282
8.2.2 Troubleshooting flow .........................................................................239
......................................................................................240(2) Troubleshooting
(1) List of troubles ........................................................................................239
(6) Outdoor unit inspection points ................................................................238
(1) FDTC series (RCN-TC-24W-E2) ...........................................................314
(2) FDEN, FDE series (RCN-E-E2) ..............................................................322
.................................................................330(3) FDUM series (RCN-KIT4-E2)
(11) Inspection procedure for blown fuse on the indoor and outdoor PCB ....221
(12) Outdoor unit inspection points ................................................................222
........................................221(10) How to make sure of wireless remote control
8.2.1 Diagnosing of microcomputer circuit ..............................................224
8.2 FDTC, FDEN, FDE and FDUM series .....................................................224
(1) Selfdiagnosis function ............................................................................224
(2) Troubleshooting procedure .....................................................................227
..........................................................227
(5) Inverter checker for diagnosis of inverter output ....................................238
(4) Check of anomalous operation data with the remote control
(3) Troubleshooting at the indoor unit
.................236
(9) Checking the indoor electrical equipment ..............................................220

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■ How to read the model name
Example:
Outdoor unit
SCM 71 Z
Series code
Inverter type
Product capacity
Model name
M-S1
Capacity
Model
Floor standing type (SRF)
Outdoor unit to be combined (SCM)
20 25 35 50 60
○ ○ ○ ○ ○
○ ○ ○ ○
○ ○ ○
○ ○ ○
○ ○ ○ ○
○
○
○
○
SCM71ZM-S1, 80ZM-S1
Ceiling concealed type (SRR)
■ Table of models
Wall mounted type (SRK＊＊ZSX-S)
Wall mounted type (SRK＊＊ZS-S)
Duct connected Low/Middle static
pressure type (FDUM)
4 way ceiling cassette type (FDTC)
Ceiling suspended type (FDEN)
Ceiling suspended type (FDE)
Example:
Indoor unit
SRK 20 Z
Series code
Inverter type
Product capacity
Model name SRK
SRF
SRR
FDTC
FDEN, FDE
FDUM
SX-S
: Wall mounted type
: Floor standing type
: Ceiling concealed type
: 4 way ceiling cassette type
: Ceiling suspended type
: Duct connected Low/Middle
static pressure type
13. TECHNICAL INFORMATION ........................................................................360
(1) Model SCM71ZM-S1 ..............................................................................360
(2) Model SCM80ZM-S1 ..............................................................................371

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1. OUTDOOR UNITS
1.1 Specifications
Model
Item SCM71ZM-S1
Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz
Operation
data (1)
Nominal cooling capacity (Range) kW 7.1 ( 1.8 (Min.) - 8.8 (Max.))
Nominal heating capacity (Range) kW 8.6 ( 1.5 (Min.) - 9.4 (Max.))
Heating capacity (H2) kW −
Power consumption
Cooling
kW
1.58 (0.48 - 2.75)
Heating 2.00 (0.60 - 3.35)
Heating (H2) −
Max power consumption 3.7
Running current Cooling
A
7.3 / 6.9 / 6.6 (220/ 230/ 240 V)
Heating 9.2 / 8.8 / 8.4 (220/ 230/ 240 V)
Inrush current, max current 5.0 Max. 20
Power factor Cooling ％99
Heating 99
EER Cooling 4.49
COP Heating 4.30
Heating (H2) −
Sound power level Cooling
dB(A)
63
Heating 66
Sound pressure level Cooling 50
Heating 54
Silent mode sound pressure level Cooling:45 / Heating:51
Exterior dimensions (Height x Width x Depth) mm 750 x 880 x 340
Exterior appearance
(Equivalent color)
Stucco white
Munsell : (4.2Y 7.5/1.1), RAL : 7004
Net weight kg 62
Compressor type & Quantity RM-T5118MDE2 (Twin rotary type) x 1
Compressor motor (Starting method) kW 1.4 (Line starting)
Refrigerant oil (Amount, type) 0.675 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 3.15 (Incl. the amount for the piping of 40m)
Heat exchanger M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Device control Microcomputer control
Fan type & Quantity Propeller fan x 1
Fan motor (Starting method) W 86 x1 (Direct drive)
Air flow Cooling m3/min 50
Heating 56
Shock & vibration absorber Rubber sleeve (for fan motor & compressor)
Electric heater Crank case heater (220V 20W)
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Outdoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Installation
data
Refrigerant piping size ( O.D ) mm Liquid line:φ6.35 (1/4") x 4 Gas line:φ9.52 (3/8") x 4
Connecting method Flare connection
Insulation for piping Necessary (Both sides), independent
Refrigerant line (One way) length m Max. 25 (Length for one indoor unit)
Max. 70 (Total length for all rooms)
Vertical height diff. between O.U. and I.U. m Max. 20 (Outdoor unit is higher)
Max. 20 (Outdoor unit is lower)
Height difference of the indoor units m Max. 25
Recommended breaker size A 25
L.R.A. (Locked rotor ampere) A 5
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable)
Connecting method Terminal block (Screw fixing type)
IP number IPX4
Standard accessories Union : (φ9.52 →φ12.7 ) × 2, Installation sheet, Elbow, Grommet
Indoor unit to be combined
SRK20,25,35,50,60ZSX-S
SRK20,25,35,50ZS-S
SRF25,35,50ZMX(A)-S, SRR25,35,50,60ZM-S
FDTC25,35,50,60VF, FDEN50VF, FDE50VG, FDUM50VF
Number of connectable indoor units Min. 2 −Max. 4
Total of indoor units kW Max. 12.5
Notes (1) The data are measured at the following conditions.
Item
Operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C ISO5151-H1
Heating (H2) 20˚C — 2˚C 1˚C ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat
higher due to ambient conditions.
(4) Select the breaker size according to the own national standard.
The pipe length is 5m.
RWC000Z304

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Model
Item SCM80ZM-S1
Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz
Operation
data (1)
Nominal cooling capacity (Range) kW 8.0 ( 1.8 (Min.) - 9.2 (Max.))
Nominal heating capacity (Range) kW 9.3 ( 1.5 (Min.) - 9.8 (Max.))
Heating capacity (H2) kW −
Power consumption
Cooling
kW
1.95 ( 0.48 - 2.83 )
Heating 2.26 ( 0.60 - 3.43 )
Heating (H2) −
Max power consumption 3.7
Running current Cooling
A
9.0 / 8.6 / 8.2 (220/ 230/ 240 V)
Heating 10.4 / 10.0 / 9.5 (220/ 230/ 240 V)
Inrush current, max current 5.0 Max. 20
Power factor Cooling ％99
Heating 99
EER Cooling 4.10
COP Heating 4.12
Heating (H2) −
Sound power level Cooling
dB(A)
66
Heating 66
Sound pressure level Cooling 54
Heating 54
Silent mode sound pressure level Cooling:46 / Heating:51
Exterior dimensions (Height x Width x Depth) mm 750 x 880 x 340
Exterior appearance
(Equivalent color)
Stucco white
Munsell : (4.2Y 7.5/1.1), RAL : 7004
Net weight kg 62
Compressor type & Quantity RM-T5118MDE2 (Twin rotary type) x 1
Compressor motor (Starting method) kW 1.4 (Line starting)
Refrigerant oil (Amount, type) 0.675 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 3.15 (Incl. the amount for the piping of 40m)
Heat exchanger M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Device control Microcomputer control
Fan type & Quantity Propeller fan x 1
Fan motor (Starting method) W 86 x1 (Direct drive)
Air flow Cooling m3/min 56
Heating 56
Shock & vibration absorber Rubber sleeve (for fan motor & compressor)
Electric heater Crank case heater (220V 20W)
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Outdoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Installation
data
Refrigerant piping size ( O.D ) mm Liquid line:φ6.35 (1/4") x 4 Gas line:φ9.52 (3/8") x 4
Connecting method Flare connection
Insulation for piping Necessary (Both sides), independent
Refrigerant line (One way) length m Max. 25 (Length for one indoor unit)
Max. 70 (Total length for all rooms)
Vertical height diff. between O.U. and I.U. m Max. 20 (Outdoor unit is higher)
Max. 20 (Outdoor unit is lower)
Height difference of the indoor units m Max. 25
Recommended breaker size A 25
L.R.A. (Locked rotor ampere) A 5
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable)
Connecting method Terminal block (Screw fixing type)
IP number IPX4
Standard accessories Union : (φ9.52→φ12.7) × 2, Installation sheet, Elbow, Grommet
Indoor unit to be combined
SRK20,25,35,50,60ZSX-S
SRK20,25,35,50ZS-S
SRF25,35,50ZMX(A)-S, SRR25,35,50,60ZM-S
FDTC25,35,50,60VF, FDEN50VF, FDE50VG, FDUM50VF
Number of connectable indoor units Min. 2 −Max. 4
Total of indoor units kW Max. 13.5
Notes (1) The data are measured at the following conditions.
Item
Operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C ISO5151-H1
Heating (H2) 20˚C — 2˚C 1˚C ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat
higher due to ambient conditions.
(4) Select the breaker size according to the own national standard.
The pipe length is 5m.
RWC000Z304

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1.2 Exterior dimensions
Models SCM71ZM-S1, 80ZM-S1
RWC000Z302
15
60
38019
418
73880
150 580 150 26
340
2-R7.5
223
47.5
310
61
61
110.4 52
185 10
24
750
214.4 52
318.4 52
422.4 52
20
355 170
560
Unit:mm
The height of a wall is 1200mm or less
Notes
（1）It must not be surrounded by walls on four sides. （2）The unit must be fixed with anchor bolts. An anchor bolt
must not protrude more than 15mm.
（3）Where the unit is subjected to strong winds, lay it in such a
direction that the blower outlet faces perpendicularly to the dominant wind direction.
（4）Leave 1.2m or more space above the unit. （5）A wall in front of the blower outlet must not exceed the
unit's height.
（6）The model name label is attached on the rear panel.
D
Terminal block
C
E
Symbol Content
A Service valve connection（gas side）φ9.52（3／8"）（Flare）
B Service valve connection（liquid side）φ6.35（1／4"）（Flare）
C Pipe／cable draw-out hole
D Drain discharge hole φ20 x 3 places
E Anchor bolt hole M10 x 4 places
B
A
Air intake
Air intake
Air outlet
（Service space
for electrical parts）
Minimum installation space
L2 L4
L1
L3
Center of gravity
Center of gravity
L2 L3
L4
L1
300
100
250
Open
ＩＩＩ
Open
250
100
500
ＩＩＩ
Open
250
150
250
Examples of
Dimensions
installation