Daikin VRV User manual

Si30-408
Basic Training Manual

PREFACE
The latest technological innovations of air conditioners make remarkable progress. We are not able to perform our duty
without mastering the proper basic theory and knowledge in service skills and techniques.
The field of VRV system particularly
shows such a rising tendency. The techniques on trouble shooting and trouble removing corresponding to the
computerized and systematized products are required. Based on these requests, therefore, we have prepared this
manual, emphasizing the understanding on VRV system.
We wish that you would use this manual as a guidebook for the service of VRV system or as a reference book for
education of service personnel, which leads to the development of skills in whole service group of Daikin.
DEC.2004
DAIKIN INDUSTRIES, LTD.
After Sales Service Division

Si30-408
General Contents i
General Contents
General ContentsGeneral Contents
General Contents
A. Introduction................................................................................ 1
B. Basic Information..................................................................... 21
C. Field Settings from Remote Controller.................................... 41
D. Troubleshooting ....................................................................... 67
E. Cases for Examination ........................................................... 109
F. Service Checker Type3 Application Edition .......................... 127
G. Appendix ................................................................................ 191
Index ................................................................................................ i
Drawings & Flow Charts ............................................................... iii

Si30-408
ii General Contents

Si30-408
Introduction 1
A. Introduction
A. IntroductionA. Introduction
A. Introduction
1. What is a VRV System?..........................................................................2
2. List of VRV Unit Models ..........................................................................3
2.1 List of Outdoor Unit Models......................................................................3
2.2 Nomenclature ...........................................................................................5
3. System Basic Configuration ..................................................................11
3.1 Cooling / Heating Selection -Standard- System .....................................11
3.2 Heat Recovery (Cooling / Heating Individual Operating) System...........14
4. Super Wiring System ............................................................................15
4.1 Points of Super Wiring System...............................................................15
4.2 Wiring Length .........................................................................................16
5. REFNET Piping.....................................................................................17
5.1 Allowable Length of Refrigerant Piping ..................................................17
5.2 For Refrigerant Piping ............................................................................19

What is a VRV System? Si30-408
2Introduction
1. What is a VRV System?
VRV System
Thirty or more indoor units can be connected to single system.
There are "cooling / heating selection -standard- type" and "individual operating system of
cooling and heating" according to type of the system.
One of the biggest characteristics is mounting of expansion valves ⊗to the indoor unit as
well as to the outdoor unit.
SkyAir, Residential Air Conditioner
Pair Type
Single indoor unit is connected to single outdoor unit.
(The expansion valve is mounted to the outdoor unit only.)
SKY AIR System for Simultaneous Operation (Twin, Triple, and Double-Twin)
These series are included in SkyAir. These types can be connected to two to four indoor
units to single system. However, the individual operation is not available, only the
simultaneous operation.
(The expansion valve is mounted to the outdoor unit only.)
Multi System for Individual Operation
Each indoor unit can be operated individually.
However, refrigerant piping is connected to each indoor unit using separate connecting
piping, not using halfway branch piping.
(The expansion valve is mounted to outdoor unit by each indoor unit.)
: Position of expansion valve

Si30-408 List of VRV Unit Models
Introduction 3
2. List of VRV Unit Models
2.1 List of Outdoor Unit Models
Type R22 C to H series R22 K series
Standarad Comp. Type
VRV Standard C series VRV for High outdoor temp (with unloader comp.)
Model Type
Service manual Model Type Service manual
—
RSC10,15C
—
Cooling only
—
(ES20-2)
RSNY8KTAL Heat-pump Si-06
VRV Standard D series
Model Type
Service manual
RSCY10,15D
—
Heat-pump
—
Si-46A
—
VRV Standard G series
Model Type
Service manual
RSCY5,10 G
RSC5,10G
Heat-pump
Cooling only
Si-45F
Si-45F
VRV Standard F series
Model Type
Service manual
RSCY10,15F
RSC10,15F
Heat-pump
Cooling only
Si-46A
Si-46A
Small Capacity Inverter Type
VRV Inverter G series VRV Inverter K series
Model Type
Service manual Model Type Service manual
RSXY5-10G(J)
RSX8,10G(J)
RSEY8,10G(J)
Heat-pump
Cooling only
Heat recovery
Si-45F
Si-45F
Si-45F
RSXY5-10K
RSX5-10K
RSEY8,10K
Heat-pump
Cooling only
Heat recovery
Si-05C
Si-05C
—
VRV Inverter H series VRV Inverter KU series
Model Type
Service manual Model Type Service manual
RSXY5-10H(J)
RSX5-10H(J)
Heat-pump
Cooling only
Si-46C
Si-46C
RSX5-10KU Cooling only Si-91
VRV Inverter KA series
Model Type
Service manual
RSX5-10KA Cooling only Si-92
VRV Inverter K series (H/R with Scroll Comp.)
Model Type
Service manual
RSEY8-10KLY1
Heat recovery Si-95
High COP
Inverter Type
Large Capacity Inverter Type
VRV Plus series
Model
Function unit Inverter Cnstant Speed Type Service manual
RXY16-30K
RX16-30K
REY16-30K
BL2 or 3K
BC2 or 3K
BR2 or 3K
RXY8 or 10K
RX8 or 10K
RXY8 or 10K
RNY8 or 10K
RN8 or 10K
RNY8 or 10K
Heat-pump
Cooling only
Heat recovery
Si-05C
Si-05C
Si-11
VRV Plus series for High outdoor temp
Model
Function unit Inverter Cnstant Speed Condenser Type Service manual
RXY16-30K-K
RX16-30K-K
BL2 or 3K
BC2 or 3K
RXY8 or 10K
RX8 or 10K
RNY8 or 10K
RN8 or 10K
RXE2 or 3K
RXE2 or 3K
Heat-pump
Cooling only
Si-94
Si-94
VRV R22 Plus series
Model Main unit Sub unit Type
Service manual
RSXY16-30KA RXY8 or 10KA RXE8 or 10KA Heat-pump Si33-101
VRV II series
Model Module Type
Service manual
RXY5-48M
RX5-48M
RXY8-16M
RX8-16M
Heat-pump
Cooling only
Si38-304
Si38-304

List of VRV Unit Models Si30-408
4Introduction
Type R-407C R410A
Standarad Comp. TypeSmall Capacity Inverter Type
VRV Inverter K series
Model Type
Service manual
RSXYP5-10KJY1
RSXP5-10KY1
Heat-pump
Cooling only
Si-90A
Si33-106
VRV Inverter K series (H/R with Scroll Comp.)
Model Type
Service manual
RSEYP8, 10KJY1 Heat-
Recovery
Si-96
High COP
Inverter Type
VRV High COP type L series
Model Type
Service manual
RSXYP5-10L Heat-pump Si33-201
Large Capacity Inverter Type
VRV Plus series
Model Main unit Sub unit Type
Service manual
RSXYP16-30KJ
RSXP16-30K
RSEYP16-30KJ
RXYP8 or 10KJ
RXP8 to 20K
REYP8 or 20KJ
RXEP8 or 10KJ
RXEP8 to 10K
RXEP8 or 10KJ
Heat-pump
Cooling only
Heat recovery
Si33-002
Si33-103
Si33-105
VRV II series
Model Module Type
Service manual
RXYQ5-48M
REYQ5-48M
RXYQ5-16M
REYQ5-16M
Heat-pump
Heat recovery
Si39-302
Si39-404
Si39-306

Si30-408 List of VRV Unit Models
Introduction 5
2.2 Nomenclature
2.2.1 Nomenclature (Previous indication)
Indoor Unit
Power supply symbol
V1 : Single phase 220 to 240V, 50Hz
VE : Single phase 220 to 240V, 50Hz : 220V, 60Hz
VAL : Single phase 220V, 60Hz
Indicates major design category
KA : Models for ceiling mounted low silhouette duct type
Models for ceiling suspended type
KB : Models for super cassette
KJ : Models applied for EC regulation
KF : Outdoor air processing unit
Capacity Indication
Conversion to horsepower:
20 : 0.8 HP 50 : 2.0 HP 125 : 5 HP
25 : 1 HP 63 : 2.5 HP 200 : 8 HP
32 : 1.25 HP 80 : 3.2 HP 250 : 10 HP
40 : 1.6 HP 100 : 4 HP
Refrigerant type
No indication : R22
P : R407C
Type of unit
C : Ceiling mounted cassette type (Double flow)
F : Ceiling mounted cassette type (Multi flow) – Super cassette –
K : Ceiling mounted cassette corner type
D : Ceiling mounted low silhouette duct type (Low static pressure)
S : Ceiling mounted built-in type
B : Ceiling mounted built-in (Rear suction)
M : Ceiling mounted duct type or outdoor air processing unit
H : Ceiling suspended type
A : Wall mounted type
L : Floor standing type
LM : Concealed floor standing type
N : Concealed floor standing type
Indicates that this is a INVERTER SERIES indoor unit.
FX : Cooling Only
FXY : Heat Pump
C 40 V1 KP
FXY
(V1217)

List of VRV Unit Models Si30-408
6Introduction
Indoor Unit
Power supply symbol
V1 : Single phase 220 to 240V, 50Hz
Indicates major design category
B: New ceiling suspended cassette
K: Wall mounted type 40-63
Capacity Indication
Conversion to horsepower:
40 : 1.6HP 50 : 2.0HP 63 : 2.5HP
71 : 3 HP 100 : 4 HP 125 : 5 HP
Refrigerant : R407C
Type of unit
FUY : New ceiling suspended cassette type
FXYA : Wall mounted type 40-63
P 71 V1 B
FUY
(V2863)

Si30-408 List of VRV Unit Models
Introduction 7
Connection Unit (Only Necessary for FUYP Indoor Units)
BS Unit (Only Necessary for Heat Recovery System)
Power supply symbol
VE : Single phase 220 to 240V, 50Hz : 220V, 60Hz
Indicates major design category
Capacity Indication
Conversion to horsepower:
71 : 3HP
140 : 6HP
Type of Unit
Connection Unit.
BEV K VE71
(V2864)
V1 : Single phase 220 to 240V, 50Hz
Indicates major design category
Capacity Indication (Connectable total indoor unit capacity)
100 : Total indoor unit capacity less than 100
160 : Total indoor unit capacity 100 or more but less than 160
250 : Total indoor unit capacity 160 or more but less than 250
Refrigerant type
No indication : R22
P : R407C
Q : R410A
Indicates that this is a BS unit.
BSV KJ V1P 100
(V2287)

List of VRV Unit Models Si30-408
8Introduction
Outdoor Unit (Combination Model Name)
Outdoor Unit (Modular Model Name)
Y1K
The unit with anti-corrosion treatment
Power supply symbol
Y1 : 3 phase 380 to 415V, 50Hz TAL : 3 phase 220V, 60Hz
YAL : 3 phase 380V, 60Hz
Indicates major design category
L : Heat Pump (5, 8, 10HP) KL : Heat Recovery
KJ : Heat Pump, Heat Recovery KU : Cooling Only, 50Hz
K : Cooling Only KA : Cooling Only, 50Hz
(internal company symbol)
5 : 5HP 16 : 16 HP 24 : 24 HP 30 : 30 HP
8 : 8 HP 18 : 18 HP 26 : 26 HP
10 : 10 HP 20 : 20 HP 28 : 28 HP
Refrigerant : R407C
No indication : R22
Indicates that this is a
RSXY : Heat Pump
RSEY :Heat Recovery
RSX : Cooling Only
16 EP
RSX
(V2288)
The unit with anti-corrosion treatment
Power supply
Y1 : 3 phase 380 to 415V, 50Hz
Indicates major design category
KJ : Indicates that this is a Heat Pump or Heat Recovery type
K : Indicates that this is a Cooling Only type
8 : 8 HP 16 : 16 HP
10 : 10 HP 20 : 20 HP
Refrigerant : R407C
RXY : Indicates that this is a main unit (Heat Pump)
REY : Indicates that this is a main unit (Heat Recovery)
RX : Indicates that this is a main unit (Cooling Only)
RXE : Indicates that this is a sub unit
E
Y1 8 K
RX
P
(V2289)

Si30-408 List of VRV Unit Models
Introduction 9
2.2.2 Nomenclature (New indication)
Indoor Unit
BS Unit (Only Necessary for Heat Recovery System)
Power supply symbol
VE : Single phase 220 to 240V, 50Hz : 220V, 60Hz
V1 : Single phase 220 to 240V, 50Hz
Indicates major design category
Capacity Indication
Conversion to horsepower:
20 : 0.8 HP 50 : 2.0 HP 125 : 5 HP
25 : 1 HP 63 : 2.5 HP 200 : 8 HP
32 : 1.25 HP 80 : 3.2 HP 250 : 10 HP
40 : 1.6 HP 100 : 4 HP
Refrigerant : R410A
No indication : R22
Type of unit
C : Ceiling mounted cassette type (Double flow)
Z : Ceiling mounted cassette type (600×600 Multi flow)
F : Ceiling mounted cassette type (Multi flow)
K : Ceiling mounted cassette corner type
S : Ceiling mounted built-in type
M : Ceiling mounted duct type
H : Ceiling suspended type
A : Wall mounted type
L : Floor standing type
N : Concealed floor standing type
D : Slim ceiling mounted duct type
U : Ceiling suspended cassette type (Connection unit series)
Indicates that this is VRV system indoor unit.
C 40 VE MQ
FX
(V2286)
V1 : Single phase 220 to 240V, 50Hz
Indicates major design category
Capacity Indication (Connectable total indoor unit capacity)
100 : Total indoor unit capacity less than 100
160 : Total indoor unit capacity 100 or more but less than 160
250 : Total indoor unit capacity 160 or more but less than 250
Refrigerant : R410A
No indication : R22
Indicates that this is a BS unit.
BSV M V1Q 100
(V2287)

List of VRV Unit Models Si30-408
10 Introduction
Outdoor Unit
Connection Unit (Only Necessary for FXUQ Indoor Units)
Y1
B : The unit is for European Standards
E : Unit with anti corrosion treatment
Power supply symbol
Y1 : 3 phase 380 to 415V, 50Hz YL : 3 phase 380V 60Hz
TL : 3 phase 220V, 60Hz
Indicates major design category
5 : 5HP 14 : 14 HP 22 : 22 HP 30 : 30 HP 40 : 40 HP
8 : 8 HP 16 : 16 HP 24 : 24 HP 32 : 32 HP 42 : 42 HP
10 : 10 HP 18 : 18 HP 26 : 26 HP 34 : 34 HP 44 : 44 HP
12 : 12 HP 20 : 20 HP 28 : 28 HP 36 : 36 HP 46 : 46 HP
38 : 38 HP 48 : 48 HP
Refrigerant: R410A
No indication : R22
Indicates that this is a
RX : Cooling Only
RXY : Heat Pump
REY : Heat Recovery
MB
48Q
RXY
(V2288)
Power supply symbol
VE : Single phase 220 to 240V, 50Hz : 220V, 60Hz
Indicates major design category
Capacity Indication
Conversion to horsepower:
71 : 3HP
140 : 6HP
Type of refrigerant
Q : R410A
Type of Unit
Connection Unit.
BEV M VEQ 71
(V2864)

Si30-408 System Basic Configuration
Introduction 11
3. System Basic Configuration
3.1 Cooling / Heating Selection -Standard- System
3.1.1 Type A
zR(S)XY(P) ~
Outdoor unit
Cooling Mode
Cooling Mode
R22 / R407C
Two pieces of piping for liquid and gas
Normal motorized valve
(SH) control
Normal motorized valve (SH) control
Master Slave
Slave
• Controls operation mode by using four way valve
• Changing of outdoor heat exchanger to
condenser or evaporator
• Selection for cooling / heating is possible only by master
remote controller (not displaying "selection under control")
which has been set.
• Slave remote controllers have following selection function
only.
(1) Cooling, dry and fan only at Master unit cooling
(2) Heating and fan only at Master unit heating

System Basic Configuration Si30-408
12 Introduction
3.1.2 Type B
zBL 2 ~ 3K (A) : Functional unit
RXY ~ K (A) : Inverter unit
RNY ~ K (A) : STD unit
Functional unit
STD unit Inverter unit
Enter to functional unit
from each outdoor unit.
Among outdoor units: three pieces of piping for liquid,
gas, and oil equalizer
To indoor units : Two pieces of piping for liquid and gas
Cooling Mode
Cooling Mode
Normal motorized valve (SH) control
Normal motorized valve (SH) control
Master Slave
Slave
R22 R22
• Selection for cooling / heating is possible only by master remote
controller (not displaying "selection under control") which has
been set.
• Slave remote controllers have following selection function only.
(1) Cooling, dry and fan only at Master unit cooling
(2) Heating and fan only at Master unit heating

Si30-408 System Basic Configuration
Introduction 13
3.1.3 Type C
zRX(Y)(Q) ~ M
Outdoor unit Outdoor unit
Cooling Mode
Outdoor unit
R410A or R22 R410A or R22 R410A or R22
Three pieces of piping for liquid, gas, and oil equalizer
Oil equalizer is installed only when outdoor VRV system is connected.
Cooling Mode
Normal motorized valve
(SH) control
Normal motorized valve (SH) control
Master Slave
Slave
•Controls operation mode by using
four way valve
•Changing of outdoor heat
exchanger to condenser or
evaporator
•Selection for cooling / heating is possible only by master
remote controller (not displaying "selection under control")
which has been set.
•Slave remote controllers have following selection function only.
(1) Cooling, dry and fan only at Master unit cooling
(2) Heating and fan only at Master unit heating

System Basic Configuration Si30-408
14 Introduction
3.2 Heat Recovery (Cooling / Heating Individual Operating)
System
zR(S)EYP(Q) ~
Outdoor unit
Selection to cooling and heating in the BS unit.
Cooling Mode
Heating Mode
R22 / R407C
/ R410A
BS unit
BS unit
Three pieces of piping for discharge, liquid,
and gas
Normal motorized valve
(SH) control
Normal motorized valve (SC) control
Master Slave
Master
Controls cooling and heating by selection the inside
solenoid valve
•Control operation mode by using plural four way valves
•Outdoor heat exchanger is divided and changed to condenser
/ evaporator based on the load
•Selection for cooling / heating is possible only by master
remote controller (not displaying "selection under control")
which has been set in each BS unit.
•Slave remote controllers have following selection function only.
(1) Cooling, dry and fan only at Master unit cooling
(2) Heating and fan only at Master unit heating

Si30-408 Super Wiring System
Introduction 15
4. Super Wiring System
4.1 Points of Super Wiring System
Point Q
All control wires shall be of
no polarity and two core type.
Point T
Point R
O-O connection wiring
· Connection wiring between
refrigerant piping systems
· Maximum ten refrigerant piping
systems can be installed.
· In order to connecting to system
including conventional system
wiring, connect centralized
transmission lines with this part.
ABC
Cooling / heating selection
remote controller
F1F2
O·O
F1F2
I·O
F1F2
I·O
F1
F2
F1F2 F1F2
Outdoor unit
(Master unit)
Outdoor unit
(Slave unit)
Power supply
Centralized control
device
Point S
N
NP
P
Indoor unit
Power supply
Single phase, 220 ~ 240 V
Remote controller
F1F2
I·O
N
NP
P
F1F2
I·O
NP
F1
I·O
N
NP
Indoor unit
Power supply
Single phase, 200 V
Remote controller
Power supply
3-phase, 220 V
or 380 ~ 415 V
ABC
Cooling / heating selection
remote controller
O· O I·O
Outdoor unit A
(Master unit)
Outdoor unit B
(Slave unit)
F1F2
I·O
Outdoor unit C
(Slave unit)
Power supply 3-phase, 200 V
Power supply
3-phase, 200 V
F1F2F2
I·O
N
NP
PP
F1F2
I·O
N
System
Q
To other system
Remote controller Remote controller Remote controller
· Wire from terminal unit of
O-O connection wiring to
avoid three wires clamping
on terminal block. (Use
relay terminal for halfway
branch)
I-O connection wiring
· Wire by refrigerant piping
system
· This time, in super wiring
system, centralized
transmission line is
integrated to I-O
connection wiring.
Wiring between indoor
units beyond the system is
not available. (Otherwise,
operation with temperature
control will not be
available.)
Remote controller Remote controller
Remote controller
System
R