Mitsubishi Heavy Industries SRK25ZMP-SJ User manual

TECHNICAL MANUAL
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK25ZMP-SJ
SRK35ZMP-SJ
Manual No.'13•SRK-T-152

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1
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'13 • SRK-T-152
'10 • SRK-T-099
CONTENTS
1. SPECIFICATIONS ........................................................................................ 3
(2) Outdoor units ....................................................................................... 6
..................................................... 13
(3) Wireless remote control ...................................................................... 7
......................................................................... 5
(1) Indoor units .......................................................................................... 5
2. EXTERIOR DIMENSIONS
3. ELECTRICAL WIRING .............................................................................. 8
(1) Indoor units .......................................................................................... 8
4. NOISE LEVEL ............................................................................................ 10
(2) Outdoor units ....................................................................................... 9
6. RANGE OF USAGE & LIMITATIONS
................................................................................... 15
7. CAPACITY TABLES
5. PIPING SYSTEM ...................................................................................... 12
.................................................................................. 16
8. APPLICATION DATA
9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............... 24
(8) Timer operation .................................................................................. 27
....................................................... 25
(1) Operation control function by remote control
(7) Flap control ........................................................................................ 26
(6) Economy operation ............................................................................. 26
(5) High power operation .......................................................................... 26
(4) Custom cord switching procedure
......................................................................... 25(3) Auto restart function
(2) Unit ON/OFF button ........................................................................... 25
...................................... 24
(9) Outline of heating operation ................................................................ 27
(11) Outline of automatic operation ........................................................... 29
(10) Outline of cooling operation ............................................................... 29
(12) Protection control function ................................................................... 30
(13) Outline of dry (dehumidifying) operation ............................................. 36
..................... 38
............................................................................... 37
(4) Troubleshooting procedure (If the air conditioner runs)
(3) Troubleshooting procedure (If the air conditioner does not run at all)
........ 37
(1) Cautions ............................................................................................. 37
(2) Items to check before troubleshooting ................................................. 37
(5) Self-diagnosis table ............................................................................. 39
(6) Service mode (Trouble mode access function) ................................... 40
10. MAINTENANCE DATA

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(10) How to make sure of wireless remote control ...................................... 54
(11) Outdoor unit inspection points .............................................................. 55
(8) Phenomenon observed after shortcircuit, wire breakage on sensor ......... 52
(9) Checking the indoor electrical equipment ........................................... 53
■How to read the model name
Example: SRK 25 Z
Series code
Inverter type
Product capacity (Cooling capacity)
Model name SRK : Wall mounted type
SRC : Outdoor unit
MP-SJ
(7) Inspection procedures corresponding to detail of trouble .................... 48

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3
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'13 • SRK-T-152
Model SRK25ZMP-SJ
Model
Item
SRK25ZMP-SJ
Indoor unit SRK25ZMP-SJ Outdoor unit SRC25ZMP-SJ
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 2.5 (0.9 (Min.) - 2.8 (Max.))
Nominal heating capacity (range) kW 2.8 (0.8 (Min.) - 3.9 (Max.))
Power
consumption
Cooling
kW
0.780 (0.25 - 1.01)
Heating 0.755 (0.20 - 1.43)
Max power consumption 1.65
Running
current
Cooling
A
3.9 / 3.8 / 3.6 (220 / 230 / 240 V)
Heating 3.8 / 3.7 / 3.5 (22 0 / 230 / 240 V)
Inrush current, max current 3.9 / 3.8 / 3.6 (220 / 230 / 240 V) Max. 9
Power factor Cooling %90
Heating 89
EER Cooling 3.21
COP Heating 3.71
Sound power level Cooling
dB(A)
59 60
Heating 58 59
Sound pressure level Cooling Hi: 45 Me: 34 Lo: 23 47
Heating Hi: 43 Me: 34 Lo: 26 45
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 262 x 769 x 210 540 x 645(+57) x 275
Exterior appearance
(Munsell color)
Fine snow
(8.0Y 9.3/0.1) near equivalent
Stucco white
(4.2Y 7.5/1.1) near equivalent
Net weight kg 6.9 25
Compressor type & Q'ty — RM-B5077MDE5(Rotary type) x 1
Compressor motor (Starting method) kW — 0.75 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 0.655 in outdoor unit (incl. the amount for the piping of 10m)
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 10.1 Me: 7.3 Lo: 4.2 26.0
Heating Hi: 9.5 Me: 7.3 Lo: 5.2 19.7
Available external static pressure Pa 0 0
Outside air intake Not possible —
Air filter, Quality / Quantity Polypropylene net (washable) —
Shock & vibration absorber Rubber sleeve (for fan motor) Rubber sleeve (for fan motor & compressor)
Electric heater — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN: Green, TIMER: Yellow
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor 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") Gas line :φ9.52 (3/8")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.39 / Gas line : 0.32 —
Insulation for piping Necessary (Both sides), independent
Refrigerant line (one way) length m Max. 15
Vertical height diff. between O.U. and I.U. m Max. 10 (Outdoor unit is higher) / Max. 10 (Outdoor unit is lower)
Drain hose Hose connectable (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 3.9 / 3.8 / 3.6 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (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
(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 value are somewhat
higher due to ambient conditions.
(4) Select the breaker size according to the own national standard.
(5) The refrigerant quantity to be charged includes the refrigerant in 10 m connecting piping.
(purging is not required even for the short piping. )
If the piping length is longer, when it is 10 to 15 m, add 20 g refrigerant per meter.
The pipe length is 7.5m.
1. SPECIFICATIONS

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4
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'13 • SRK-T-152
Model SRK35ZMP-SJ
Model
Item
SRK35ZMP-SJ
Indoor unit SRK35ZMP-SJ Outdoor unit SRC35ZMP-SJ
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 3.2 (0.9 (Min.) - 3.5 (Max.))
Nominal heating capacity (range) kW 3.6 (0.9 (Min.) - 4.3 (Max.))
Power
consumption
Cooling
kW
0.995 (0.23 - 1.32)
Heating 0.995 (0.19 - 1.31)
Max power consumption 1.65
Running
current
Cooling
A
4.9 / 4.7 / 4.5 (220 / 230 / 240 V)
Heating 4.9 / 4.7 / 4.5 (220 / 230 / 240 V)
Inrush current, max current 4.9 / 4.7 / 4.5 (220 / 230 / 240 V) Max. 9
Power factor Cooling %93
Heating 93
EER Cooling 3.22
COP Heating 3.62
Sound power level Cooling
dB(A)
60 60
Heating 58 60
Sound pressure level Cooling Hi: 47 Me: 36 Lo: 23 49
Heating Hi: 44 Me: 36 Lo: 28 48
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 262 x 769 x 210 540 x 645(+57) x 275
Exterior appearance
(Munsell color)
Fine snow
(8.0Y 9.3/0.1) near equivalent
Stucco white
(4.2Y 7.5/1.1) near equivalent
Net weight kg 7.2 27
Compressor type & Q'ty — RM-B5077MDE5(Rotary type) x 1
Compressor motor (Starting method) kW — 0.90 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 0.81 in outdoor unit (incl. the amount for the piping of 15m)
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 9.5 Me: 6.8 Lo: 4.2 25.4
Heating Hi: 9.6 Me: 7.4 Lo: 5.5 20.5
Available external static pressure Pa 0 0
Outside air intake Not possible —
Air filter, Quality / Quantity Polypropylene net (washable) —
Shock & vibration absorber Rubber sleeve (for fan motor) Rubber sleeve (for fan motor & compressor)
Electric heater — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN: Green, TIMER: Yellow
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor 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") Gas line :φ9.52 (3/8")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.39 / Gas line : 0.32 —
Insulation for piping Necessary (Both sides), independent
Refrigerant line (one way) length m Max. 15
Vertical height diff. between O.U. and I.U. m Max. 10 (Outdoor unit is higher) / Max. 10 (Outdoor unit is lower)
Drain hose Hose connectable (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 4.9 / 4.7 / 4.5 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
(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 value are somewhat higher
due to ambient conditions.
(4) Select the breaker size according to the own national standard.
(5) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(purging is not required even for the short piping. )
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
The pipe length is 7.5m.

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'13 • SRK-T-152
G
Terminal block
F
GG
Unit:mm
Wireless remote control
Outlet for down piping
（Refer to the above view）
Space for installation and service when viewing from the front
D E C
Hole on wall for right rear piping Hole on wall for left rear piping Gas piping Outlet for wiring Drain hose Liquid piping
F E C D B
Symbol
A
( φ65)
VP16
φ6.35(1／4")(Flare)
Content
( φ65)
Outlet for piping（on both side）
G
Model 25,35 φ9.52(3／8")(Flare) Model 45 φ12.7(1／2")(Flare)
AB
Note（1）The model name label is attached
on the underside of the indoor unit.
60
150
17.3
190 40.1
47
130.5 508 130.5
157 455 157
187.5 394 187.5
47
7.6247.5
6.9
（Service space）
65
（Service space）
15
50
（Service space）
100
（Service space）
55
359.5
427.5
530
55
Installation plate
Unit
6025 60 25
768.1
45
45
769
262
45
609
210 3
2. EXTERIOR DIMENSIONS
(1) Indoor units
Models SRK25ZMP-SJ, 35ZMP-SJ

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( )
D
E
B
A C
50
322
135
275
120.5
74.5 480 90.5 20.2
645 57.2
14.8
336
16.8
304.4
12
40
16.5
540
86.3 43.2
147.2
Center of gravity
※3
※1
※2
φ9.52(3／8")(Flare)
Content
C Pipe／cable draw-out hole
D
E Anchor bolt hole
Drain discharge hole
Symbol
B
A Service valve connection(gas side)
M10×4places
φ20×2places
Service valve connection(liquid side)φ6.35(1／4")(Flare)
Unit:mm
L2
Intake
Outlet
Intake L3
L1
Minimum installation space
Service space
L4
L2 L3
L4
L1
100 100 250
Open
Ｉ Ⅱ Ⅲ Ⅳ
Open
250
80
280
280
Open
80
100
Examples of
Dimensions
installation
180
Open
80
Open
Terminal block
SRC35ZMP-SJ SRC25ZMP-SJ
220
210
※1
108 103240
240
Dimensions
MODEL
※2※3
20゜
20゜
Notes (1)It must not be surrounded by walls on the 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 subject to strong winds, lay it in such
a direction that the blower outlet faces perpendicularly to the dominant wind direction.
(4)Leave 1m or more space above the unit. (5)A wall in front of the blower outlet must not exceed the units height. (6)The model name label is attached on the right side of the unit.
(2) Outdoor units
Models SRC25ZMP-SJ, 35ZMP-SJ

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7
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'13 • SRK-T-152
Unit: mm
60 17.3
150
(3) Wireless remote control

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8
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G
J
WIRELESS R-AMP
DISPLAY
S／N
CNGCNE
250V 3.15A
CNU
CNM
BACK UP SW
5
U
M
M
CNF
F M
S M
F
Va
DS
L
Blue BlackBK Red
BL RD
WhiteWH Yellow／GreenY／G
ColorMark
Heat exch. sensor Fan motor Room temp. sensor Flap motor Diode stackDS FuseF ConnectorCNE
FM
Terminal blockTB
Description
Item
VaristorVa
SM
ThI Th2
YellowY
Humidity sensor
HD
CNF CNG CNM CNU
BK Y／G RD
Y
WH
Y／G
RD
BK
BOX, CONTROL
3
2／N
WH
6
TO OUTDOOR UNIT
1
1 3 4 5
RD
BK
BL
HEAT EXCHANGER
WH
6 2 2 2
Th
I
Th
2
TB
t゜
t゜
HD
HEAT EXCHANGER
PWB ASSY
3. ELECTRICAL WIRING
(1) Indoor units
Models SRK25ZMP-SJ, 35ZMP-SJ

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[ ]
Color
RD
Mark
OrangeOR Yellow／GreenY／G
BlackBK
YellowY WhiteWH Red
DescriptionItem
Connector Electric expansion valve（coil）
EEV
Fan motor
FMo
Reactor
L
Terminal block
TB
Compressor motor
CM
Solenoid coil for 4 way valve
20S
Heat exchanger sensor（outdoor unit）
TH1
Outdoor air temp. sensor
TH2 TH3 Discharge pipe temp. sensor CN20S CNEEV CNFAN CNTH
25
Model
Power cable, indoor-outdoor connecting wires ● The specifications shown in the above table are for units without heaters. For units with heaters, refer
to the installation instructions or the construction instructions of the indoor unit.
● Switchgear of Circuit breaker capacity which is calculated from MAX. over current should be chosen
along the regulations in each country.
● The cable specifications are based on the assumption that a metal or plastic conduit is used with no
more than three cables contained in a conduit and a voltage drop is 2%. For an installation falling outside of these conditions, please follow the internal cabling regulations. Adapt it to the regulation in effect in each country.
35 9 2.0 32 1.5mm2x 4 1.5
3
1
2N
～220-240V 50Hz POWER SOURCE
（BK）
C-2
G1
（RD）
（Y／G）
S.IN（WH） R.IN
（BK） （WH） （RD）
PWB ASSY
250V 20A
F2
F3 250V 1A
++
F4
250V 10A
F1
250V 2A
CIRCUIT
PAM
SWITCHING POWER
CIRCUIT
P
W
V U
TRANSISTOR
POWER
W
V U
FILTER NOISE
CN20S CNTH CNEEV
CNFAN
M
M
3～
250V 15A
（Y／G）
T1 T2
（OR）
（Y）
M
TH1 TH2 TH3 EEV
FMo
CM
t゜
L N
1 3 2
TB
TO INDOOR UNIT
POWER WIRES SIGNAL WIRE
20S
L
N
t゜
t゜
t゜
MAX running current Power cable size
（mm2）
（A）
Power cable length
（m）
indoor-outdoor
wire size x number
Earth wire size
（mm2）
(2) Outdoor units
Models SRC25ZMP-SJ, 35ZMP-SJ