7. System example ...................................................................91
What is ATW heat pump?1
1-1. Compare with conventional fossil fuel boiler
• Heat pumps produce water at 30°C – 60°C
• Ideal for underfl oor heating
• Average underfl oor heating circuit 35°C
• Fossil fuel boilers heat water to 80°C
• Flow temp in rads design temp approx 70°C
• Heat pumps can still be used with radiators
• Larger surface area to emit heat from lower temp water
1-2. Points to notice
1-2-1. Design (Radiator sizing)
• Careful consideration must be given to appropriate application of this technology to maximise its benefi ts – it will not suit all
properties, especially many retrofi ts
• Heat emitters may need to be larger
• Lower fl ow temperatures maximise COP
• Various regulations apply to the design and installation of such systems
• Because the fl ow temp. of heat pump is low compare to fossile fuel boiler, the temperature difference between the primary (fl ow
water) and secondary (room air) becomes little, it makes the heat emission little.
To emit the same amount of heat energy, it is needed to select the radiator that has a larger surface area.
Be especially careful of the surface area when you design the radiator.
1-2-2. Defrost
Note: Occasionally, vapor that is made by the defrost operation may seem as if smoke come up from the outdoor unit.
1-2-3. Water Pressure loss (for packaged type outdoor unit)
• Water pressure lose of the heat exchangers are as follows.
Be aware of the infl uence when you design total pipng system.
Hex for PUHZ-W50VHA (ACH30-30Plates)
Secondary (Water - side)
Flow rate (L/min)51015202530
Pressure Loss (kPa)1.76.012.420.931.443.8
Pressure loss (kPa)
50
45
40
35
30
25
20
15
10
5
0
51015202530
Flow rate (L/min)
2
Hex for PUHZ-W85VHA (ACH30-40Plates)
Secondary (Water - side)
Flow rate (L/min)51015202530
Pressure Loss (kPa)1.03.67.512.518.826.2
Pressure loss (kPa)
30.0
25.0
20.0
15.0
10.0
5.0
0.0
51015202530
Flow rate (L/min)
Hex for PUHZ-W112, 140VHA / YHA (ACH50-50Plates)
Secondary (Water - side)
Flow rate (L/min)153045607590
Pressure Loss (kPa)1.34.910.919.329.942.8
Pressure loss (kPa)
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
153045607590
Flow rate (L/min)
33
Heat pump unit_General information2
2-1. Line-up
2-1-1. Outdoor unit for Air to water
(1) Packaged type: The Air to Water outdoor unit with a plate HEX (refrigerant-water) inside
* Outdoor units (PUHZ-RP or PUHZ-P) other than the above-mentioned become possible by connecting TH5 ( 2-phase refrig-
erant temp. thermistor ) with the interface only for Air to Air use.
1-phase3-phase1-phase3-phase
Packaged modelsZUBADAN-Packaged models
Split Replace inverter modelsSplit ZUBADAN models
2-1-2. Air to Air application
INTER FACE MODEL NAMEPAC-IF011B-E / PAC-IF010-E
AUTO
STEP *1
MANUAL
STEP *2
MANUAL STEP MODE is New function of INTER FACE (Fixed capacity = Compressor frequency (Hz) fi xed mode) .
<Old models : The models that are not described in the table above.>
*1: With(Auto-mode)+(SW2-6 is OFF)+(2phase thermistor), all A-control outdoor units are able to connect to PAC-IF010/
*2: With(Manual-mode)+(SW2-6 is OFF)+(2phase thermistor), from following RP type outdoor units are able to connect to
CapacitykW8.00
COP3.24
Power input2.47
CapacitykW8.00
COP4.40
Power input1.82
CapacitykW8.00
COP3.24
Power input2.47
CapacitykW11.20
COP3.02
Power input3.71
CapacitykW11.20
COP4.26
Power input2.63
CapacitykW11.20
COP3.24
Power input3.46
CapacitykW11.20
COP2.40
Power input4.67
CapacitykW14.00
COP2.70
Power input5.19
CapacitykW14.00
COP4.22
Power input3.32
CapacitykW14.00
COP3.20
Power input4.38
1[, 230V, 50Hz
PUHZ-HRP100VHA2 /
PUHZ-HRP100YHA2
1[, 230V, 50Hz /
3[, 400V, 50Hz
3[, 400V, 50Hz
Guaranteed operating range (Outdoor)
Heating
Cooling
:
:
-25 ~ +35
-5 ~ +46
Plate heat exchanger
ALFA LAVAL
ACH50
A: 50 mm
B: 466 mm
Ref.IN
(Heating)
w
Water OUT
B
W: 112 mm
H: 526 mm
D: 130 mm
50 plates
Ref.OUT
(Heating)
A
H
Water IN
D
Refrigerant pipng length from outdoor unit to
heat exchanger (Water HEX): 5m
Maximum outlet water temperature
65
]
60
55
50
45
Maximum outlet water temptemperature [°C
40
-25-20
-15-10-50510
Ambient temperature [°C]
The performance might be decreased by the refrigerant
pipng length, insulation of refrigerant pipng and
heat exchanger (Water HEX).
6
(2) PUHZ-RP • VHA3/YHA3(2)
Outdoor unit
Model namePUHZ-RP60VHA3#1
Power supply
(Phase, Voltage, Frequency)
Breaker sizeA25
Nominal water fl owL/min20.1
Heating
(A2/W35)
Heating
(A7/W35)
Heating
(A7/W45)
Outdoor unit
Model namePUHZ-RP71VHA3#1
Power supply
(Phase, Voltage, Frequency)
Breaker sizeA25
Nominal water fl owL/min22.9
Heating
(A2/W35)
Heating
(A7/W35)
Heating
(A7/W45)
CapacitykW6.80
COP2.94
Power inputkW2.31
CapacitykW7.00
COP4.29
Power inputkW1.63
CapacitykW7.00
COP3.27
Power inputkW2.14
CapacitykW7.50
COP2.92
Power inputkW2.57
CapacitykW8.00
COP4.21
Power inputkW1.90
CapacitykW8.00
COP3.20
Power inputkW2.50
1[, 230V, 50Hz
1[, 230V, 50Hz
Guaranteed operating range (Outdoor)
Heating
Cooling:-5 ~ +46
:
-11 ~ +35
Plate heat exchanger
ALFA LAVAL
ACH50
A: 50 mm
B: 466 mm
Ref.IN
(Heating)
w
Water OUT
B
W:112 mm
H: 526 mm
D: 82 mm
30 plates
Ref.OUT
(Heating)
A
H
Water IN
D
Refrigerant pipng length from outdoor unit to
heat exchanger (Water HEX): 5m
Maximum outlet water temperature
65
]
60
55
50
Maximum outlet water temptemperature [°C
45
-10-50510
Ambient temperature [°C]
The performance might be decreased by the refrigerant
pipng length, insulation of refrigerant pipng and
heat exchanger (Water HEX).
7
Outdoor unit
Model name
Power supply
(Phase, Voltage, Frequency)
Breaker sizeA32 / 16
Nominal water fl owL/min32.1
Heating
(A2/W35)
Heating
(A7/W35)
Heating
(A7/W45)
Outdoor unit
Model name
Power supply
(Phase, Voltage, Frequency)
Breaker sizeA32/16
Nominal water fl owL/min40.1
Heating
(A2/W35)
Heating
(A7/W35)
Heating
(A7/W45)
Outdoor unit
Model name
Power supply
(Phase, Voltage, Frequency)
Breaker sizeA40/16
Nominal water fl owL/min45.9
Heating
(A2/W35)
Heating
(A7/W35)
Heating
(A7/W45)
CapacitykW10.50
COP2.90
Power inputkW3.62
CapacitykW11.20
COP4.21
Power inputkW2.66
CapacitykW11.20
COP3.20
Power inputkW3.50
CapacitykW11.50
COP2.70
Power inputkW4.26
CapacitykW14.00
COP4.15
Power inputkW3.37
CapacitykW14.00
COP3.10
Power inputkW4.51
CapacitykW11.70
COP2.69
Power inputkW4.35
CapacitykW16.00
COP3.90
Power inputkW4.10
CapacitykW16.00
COP3.00
Power inputkW5.34
PUHZ-RP100VHA3#1 /
PUHZ-RP100YHA3#1
1[, 230V, 50Hz /
3[, 400V, 50Hz
PUHZ-RP125VHA2#2 /
PUHZ-RP125YHA2#2
1[, 230V, 50Hz /
3[, 400V, 50Hz
PUHZ-RP140VHA2#2 /
PUHZ-RP140YHA2#2
1[, 230V, 50Hz /
3[, 400V, 50Hz
Guaranteed operating range (Outdoor)
Heating
Cooling
:
:
-20 ~ +35
-5 ~ +46
Plate heat exchanger
ALFA LAVAL
ACH50
A: 50 mm
B: 466 mm
Ref.IN
(Heating)
w
Water OUT
B
W:112 mm
H: 526 mm
D: 130 mm
50 plates
Ref.OUT
(Heating)
A
H
Water IN
D
Refrigerant pipng length from outdoor unit to
heat exchanger (Water HEX): 5m
Maximum outlet water temperature
65
]
60
55
50
45
Maximum outlet water temptemperature [°C
40
-20-15
-10-50510
Ambient temperature [°C]
The performance might be decreased by the refrigerant
pipng length, insulation of refrigerant pipng and
heat exchanger (Water HEX).
8
[2]
Standard operation data <Split> Reference data (connect to Plate HEX)
CurrentA9.98.216.5/5.611.7/4.07.35.3
Discharge pressureMPa2.42.02.62.12.82.3
Suction pressureMPa0.80.70.80.70.80.7
Discharge temperature
Condensing temperature
Suction temperature
Evaporating temperature
Evaporator inlet temperature
Refrigerant circuit
Evaporator outlet temperature
Condenser inlet temperature
Condenser outlet temperature
Cooling
(A35/W7)
:
:
:
:
:
:
:
:
706078638470
423546364739
126114103
525251
5—5—5—
5—5—5—
—55—60—65
—33—31—30
Heating
(A7/W35)
ACH50-50 plates
Cooling
(A35/W7)
PUHZ-HRP100VHA2/
PUHZ-HRP100YHA2
Heating
(A7/W35)
Cooling
(A35/W7)
PUHZ-HRP125YHA2
Heating
(A7/W35)
Flow volumeL/min20.422.928.734.435.840.1
Water
Outlet water temperature
conditions
D.B.
Intake air temperature
Outdoor
conditions
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/F)
Discharge pressureMPa2.72.12.72.22.62.1
Suction pressureMPa0.80.70.80.70.80.7
Discharge temperature
Condensing temperature
Suction temperature
Evaporating temperature
Evaporator inlet temperature
Refrigerant circuit
Evaporator outlet temperature
Condenser inlet temperature
Condenser outlet temperature
:
:
:
:
:
:
:
:
ACH50-30 platesACH50-50 plates
Cooling
(A35/W7)
706570667465
453645364436
454265
515151
6—6—5—
5—5—5—
—56—57—58
—34—33—35
Heating
(A7/W35)
Cooling
(A35/W7)
Heating
(A7/W35)
Cooling
(A35/W7)
PUHZ-RP100VHA3#1/
PUHZ-RP100YHA3#1
Heating
(A7/W35)
Flow volumeL/min17.220.118.922.926.132.1
Water
Outlet water temperature
conditions
D.B.
Intake air temperature
Outdoor
conditions
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/F)
CurrentA22.4 / 7.615.0 / 5.223.6 / 8.118.2 / 6.2
Discharge pressureMPa2.82.12.82.2
Suction pressureMPa0.70.70.70.7
Discharge temperature
Condensing temperature
Suction temperature
Evaporating temperature
Evaporator inlet temperature
Evaporator outlet temperature
Refrigerant circuit
Condenser inlet temperature
Condenser outlet temperature
Flow volumeL/min34.440.135.845.9
:
:
:
:
:
:
:
:
Cooling
(A35/W7)
PUHZ-RP125VHA2#2/
PUHZ-RP125YHA2#2
80698167
46364636
3431
5-15-1
6—6—
5—5—
—63—61
—35—34
Heating
(A7/W35)
Cooling
(A35/W7)
PUHZ-RP140VHA2#2/
PUHZ-RP140YHA2#2
Heating
(A7/W35)
Water
Outlet water temperature
conditions
D.B.
Intake air temperature
Outdoor
conditions
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/F)
Refrigerant flow in cooling
Refrigerant flow in heating
(Outdoor pipe)
Restrictor
valve
Bypass
valve
Replace
filter
Strainer
#100
12
[6]
Notifi cation to design/select HEX (Refrigerant - Water)
• Specifi cations of AHU and compatibility with regulations must be confi rmed by your company.
• Selection of an apporopriate AHU (with appropriate specifi cations to match those of units
connected to the AHU such as confi guration, dimension, life-span, vibration, noise level,
or features) must be made by your company.
• Mitsubishi Electric shall not be liable for any damage to the entire system or the AHU main
body caused by connected AHU with wrong specifi cation or wrong usage of AHU.
• Mitsubishi Electric shall not be liable for any damage to the outdoor units caused by AHU damage.
( AHU : hydro box or refrigerant - water HEX )
Heat exchanger
(1) Withstanding pressure
Designed pressure of outdoor unit is 4.15 MPa. Following must be satisfi ed for burst pressure of connecting application.
Burst pressure : More than 12.45 MPa (3 times more than designed pressure)
(2) Performance
Secure the heat exchanger capacity which meets the following conditions. If the conditions are not met, it may result in
malfunction caused by the protection operation or the outdoor unit may be turned off due to the operation of protection
system.
1. Evaporate temperature is more than 4: in max. frequency operation under *1 the cooling rated conditions.
2. In case of hot water supply, condense temperature is less than 58: in max. frequency operation with the outside temperature 7:D.B./6:W.B.
*1. Outdoor: 35:D.B./24:W.B.
(3) Heat exchanger internal capacity
Heat exchanger internal capacity must be within the capacity range shown below. If the heat exchanger below the minimum capacity is connected, it may result in the back fl ow of liquid or the failure of the compressor.
If the heat exchanger above the maximum capacity is connected, it may result in the defi ciency in performance due to lack
of refrigerant or overheating of the compressor.
Minimum capacity : 10 х Model capacity [J] / Maximum capacity : 30 х Model capacity [J]
e.g. When connecting to PUHZ-HRP100 VHA2
Minimum capacity : 10 х100 =1000
Maximum capacity : 30 х100 =3000
Model capacity60(2.5HP)71(3HP)100(4HP)125(5HP)140(6HP)
Maximum capacity [J]18002130300037504200
Minimum capacity [J]600710100012501400
J
J
Warranty for SPILIT solution
(4) Contamination maintenance
1. Wash the inside of heat exchanger to keep it clean. Be sure to rince not to leave fl ux. Do not use chlorine detergent for
wash.
2. Be sure that the amount of contamination per unit cubic content of heat transfer pipe is less than the following amount.
Example) In case of [ 9.52mm
Residual water : 0.6M/C, Residual oil : 0.5M/C, Solid foreign object : 1.8M/
Note:
• Install the hydraulic fi lter at the water intake.
• Use the inlet water of higher than 5 ˚C and lower than 55 ˚C.
• The water in a system should be clean and with pH value of 6.5-8.0.
• The followings are the maximum values;
Calcium : 100mg/L
Chlorine : 100mg/L
Iron/manganese : 0.5mg/L
• Refrigerant pipe diameter from outdoor unit to refrigerant-water HEX (Only for SPLIT type)
Use the pipe with same diameter size as the refrigerant pipe connection diameter of outdoor unit.(Refer to outdoor
unit installation manual.)
• Make sure to perform the frozen prevention measure for water pipe system.(Water piping insulation, back-up pump
system, using of a certain % ethylene glycol instead of normal water)
[Reference]
TB142 has for “Forced Comp. OFF” function as the EXTERNAL INPUT(Contact signal).
To input the abnormal signal of water pump or the abnormal lowering of water fl ow amount with non-voltage contact
signal makes the outdoor unit stop forcibly. For details, refer to each part of I/F or FTC on this manual.
C
13
• The water velocity in pipes should be kept within certain limits of material to avoid erosion,corrosion and excessive
noise generation.
Be aware, and take care of , that local velocities in small pipes, bends and similar obstructions can exceed the values
of previous page.
e.g.) Copper : 1.5m/s
Warning
• Use clean enough water which meets water quality standards. The deterioration of water quality may result in the system breakdown or the water leakage.
• Never use anything other than water as a medium. It may cause a fi re or an explosion.
• Do not use heated or cooled water that is produced by the air to water heat pump directly for drinking or cooking.
There is a risk to damage your health. There is also a risk that installing the water heat exchanger may corrode if the
necessary water quality for air to water heat pump system cannot be maintained. If you wish to use the heated or
cooled water from the heated pump for these purposes, take measure such as to the second heat exchanger within
the water piping system.
Reference data
Required specifi cation and performance of Plate Heat Exchanger.
Required specifi cation
Refrigerant typeR410A
Refrigerant side
Water side
Burst pressure12.45MPa (4.15MPa ×3) or more
Frozen performanceSatisfy an initial performance since 5 times or more of deep freezing.
Heat cycle70,000 times or more…Temperature difference: about 50K
Endurance pressure72,000 times or more…Pressure difference: 3.3MPa (0 ↔ 3.3MPa)
Normal (designed) pressure4.15MPa
Operating temperature-20~100
Refrigerant typeClean water
Normal (designed) pressure1.5MPa
Operating temperature-20~90: (No freezing)
:
Required performance
< For 2.5~3 HP >
Required performance of Plate Heat ExchangerkW9.09.0
Inlet temperaturedegC75100Gas pipe: [12.7mm
Refrigerant side
(R410A)
Water side
* For heating mode, used at counter fl ow direction between refrigerant fl ow and water one.
< For 4~6 HP >
Required performance of Plate Heat ExchangerkW14.014.0
Refrigerant side
(R410A)
Water side
* For heating mode, used at counter fl ow direction between refrigerant fl ow and water one.
PAR-W21MAA(Only for FTC)I/FNG (Continue to indicate “PLEASE WAIT”)
PAR-20MAA(Standard)I/FNG (Continue to indicate “PLEASE WAIT”)
(Old )FTCNG (Continue to indicate “PLEASE WAIT”)
ManufacturerPAC-IF010-E *
Individual installerPAC-IF011B-ECased
ManufacturerPAC-IF010-E *PCB only
Individual installerPAC-IF011B-ECased
STEP I/F
ManufacturerPAC-IF010-E *PCB only
Individual installerPAC-IF011B-ECased
ManufacturerPAC-IF020-E *
Individual installerPAC-IF021B-ECased with R/C
FTC
OK
FTCNG (Continue to indicate “PLEASE WAIT”)
FTCOK
PCB only
PCB only
3-3. Flow chart to check system type
ATW
application
IF
start
Variable capacity
request signals for
Heat Pump is
calculated...
DIGITAL STEP
SYSTEM
IF PCBSystem controller
By local
controller
(your side)
By Non-voltage
Contact signals
ON/OF
Operation
mode
-Heating
-Cooling
capacity
signals
protocol is...
digital step
(non-voltage contact)
Your system is
DIGITAL STEP
SYSTEM
(IF)
(locally supplied)
End user interface
Analog
(0-10v/4-20mA…)
Your system is
ANALOG STEP
SYSTEM
(IF)
ANALOG STEP
SYSTEM
By Non-voltage
IF PCBSystem
Contact signals
ON/OF
Operation
mode
-Heating
-Cooling
controller
(locally supplied)
End user interface
By our FTC
Remote
for maintenance
- to check error code
Capacity
steps
By Non-voltage
Contact signals
1515
Capacity
Remote
For maintenance purpose
- analog signal parameters
steps
By Analog signal
4-20mA / 1-5V / 0-10V
Continued to next page.
FTC
By our FTC
Heat Pump switch ON/OFF
and the operation mode
change is done…
By remote controller
Your system is
SIMPLE SYSTEM.
(FTC)
By external signals from local controller
(non-voltage contact signals)
Your system is
‘Target flow temperature’ is set…
By remote controller
BASIC SYSTEM.
(FTC)
By external signals from local controller
(Analog signal:4-20mA/ 1-5V/ 0-10V)
Your system is ANALOG TEMP. SYSTEM.
(FTC)
SIMPLE SYSTEMBASIC SYSTEM
By Non-voltage
Contact signals
FTC PCB BOXFT C PCB BOXFTC PCB BOX
ON/OFF
Operation mode
Target flow temp.
Remote controller
End user interface
Target flow temp.
Remote controller
Topreset
- target temp. for eachmode
- target temp. parameters
ON/OFF
Operation mode
- Heating
- Heating ECO
- Hot water
- Anti freeze
- Cooling
System controller
(locally supplied)
End user interface
ANALOG TEMP. SYSTEM
Remote controller
Topreset
- analog signal parameters
By Non-voltage
Contact signals
ON/OFF
Operation mode
- Heating +
- Cooling
Target flow temp.
Analog signal
4-20mA/1-5V/0-10V
+In this system,
• Heating ECO mode of FTC is
not available.
• It is NOT necessary to switch
operation mode to realize
Hot water mode, Anti freeze
mode and Heating ECO mode.
Simply change the target temp.
by Analog signal.
System controller
(locally supplied)
End user interface
16
ATA
application
IF
start
Variable capacity
request signals for
Heat Pump is
calculated...
By local
controller
(your side)
capacity
signals
protocol is...
Analog
(0-10v/4-20mA…)
AUTO STEP SYSTEM
IF PCB
ON/OFF
Operation mode
Target retern air temp.
Remote controller
End user interface
By our IF
Your system is
AUTO STEP
SYSTEM
(IF)
DIGITAL STEP SYSTEM
By Non-voltage
Contact signals
IF
PCB
Remote
controller
for
maintenance
- to check
error code
ON/OF
Operation
mode
-Heating
-Cooling
Capacity
steps
By Non-voltage
Contact signals
System
controller
(locally
suppliied)
End user
interface
digital step
(non-voltage contact)
Your system is
DIGITAL STEP
SYSTEM
(IF)
ANALOG STEP SYSTEM
By Non-voltage
Contact signals
IF
PCB
Remote
controller
For
maintenance
purpose
- analog signal
Your systemis
ANALOG STEP
SYSTEM
(IF)
System
controller
ON/OF
Operation
mode
-Heating
-Cooling
Capacity
steps
By Analog
signal
4-20mA / 1-5V / 0-10V
(locally
suppliied)
End user
interface
17
6
5
2
1
1
8
1
2
1
8
1
8
4
3
TH1
OFF/ONOFF/ON
OFF/ON
OFF/ON
TB61
TH2
6
5
214
3
+
TB62
Adjustable resistor
4-20mA/1-5V/0-10V
Wired Remote Controller
(For Maintenance)
6
5
2
1
4
3
8
7
10
9
11
13
12
14
6
5
2
1
4
3
8
7
10
9
11 13
12 14
TB142TB141
(External Output)
(External Input)
L
N
S1 S2 S3
L
N
S1 S2 S3
TB6
DC311~
339V
FUSE
SW6
LED1
RECTIFICATION
LED2
LED3
LED4
LED5
CNS2
(RED)
Interface controller
TO OUTDOOR UNIT
U
U
DSA
21
SYMBOL
INTERFACE CONTROLLER
TB6
TB141
TB142
TB62
TB61
LED1
LED2~5
FUSE
SW1
SW2
SW3
SW6
ZNR01,02
DSA
X1
~
X6
TH1
TH2
TH5
NAME
TERMINAL BLOCK(INTERFACE/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK (External Output)
TERMINAL BLOCK (External Input REMOTE SWITCH)
TERMINAL BLOCK (External Input)
THERMISTOR(TARGET, PIPE)
POWER SUPPLY(I/F)
OPERATION INDICATION
FUSE(T3.15AL250V)
SWITCH(Input selection of inverter capacity setting) *See table 4.
Notes on system controller side in I/F connection system
(1)Please do not transmit “STEP 0” during defrost operation.
Defrost operation might be interrupted, and frost remain.
(Please demand the planned capacity step even when the system controller receives defrost signal from the heat
pump (outdoor unit)).
(2)Please do not transmit “STEP 0” when the outdoor unit(H/P) is abnormal.
Abnormal detection data is reset, and an Abnormal point cannot be confi rmed.
2323
1. System outline
With PAC-IF011B-E, local units can be connected with the outdoor units manufactured by MITSUBISHI ELECTRIC.
The commands, such as Remote switch, Varistor, 4-20mA/1-5V/0-10V and etc., allow the inverter outdoor unit to operate, to
stop and to switch capacity.
By outputting the operation state, the interface can be connected with the local unit.Also, the interface can be connected with
wired remote controller for maintenance so that the maintenance information is obtained.
Only the outdoor units with self-controlled S/W are connectable.
2. System structure
System structure(1)
Outdoor unit capacity switch
Remote switch
Capacity switch of outdoor
unit according to the remote
switch
When auto stop being set,
the difference between room
temperature and set
temperature of interface,
and the pipe temperature
switch the capacity of
outdoor unit automatically.
Wired remote controller
(Auto step mode only)
The difference between
room temperature and set
temperature of wired remote
controller, and the pipe
temperature switch the
capacity of outdoor unit
automatically.
As with the remote controller
for air conditioner, the
interface performs ON/OFF
operation, and changes
operation mode (cooling,
heating ,fan) and set
temperature.
Adjustable resistor(0-10k)
Capacity switch of outdoor
unit according to the
adjustable resistor
System diagramPower supply specifications
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Intake temp.
Liquid pipe temp.
Local unit
Wired
remote controller
Intake temp.
Liquid pipe temp.
Local unit
Wired
remote controller
Intake temp.
Liquid pipe temp.
Local unit
Local controllerAdjustable resistor
Interface controller
Remote switch
Power line
Interface controller
Remote switch
Interface controller
PAR-21MAA
Power line
Interface controller
PAR-21MAA
Interface controller
A transmission line/Power line
Power line
Outdoor unit
A transmission line/Power line
Power line
Outdoor unit
A transmission line/Power line
Power line
Outdoor unit
A transmission line/Power line
Power line
Outdoor unit
A transmission line/Power line
Power line
Outdoor unit
Power supplied from outdoor unit
Power supply for interface
controller is supplied from the
outdoor unit.
Refer to 3.1.
Separate interface/outdoor unit
power supplies
Power supply for interface
controller and power supply for
outdoor unit are supplied from the
different source.(Common power
source for local unit and interface
controller)
Refer to 3.2.
Power supplied from outdoor unit
Power supply for interface
controller is supplied from the
outdoor unit.
Refer to 3.1.
Separate interface/outdoor unit
power supplies
Power supply for interface
controller and power supply for
outdoor unit are supplied from the
different source.(Common power
source for local unit and interface
controller)
Refer to 3.2.
Power supplied from outdoor unit
Power supply for interface
controller is supplied from the
outdoor unit.
Refer to 3.1.
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Power line
Interface controller
Adjustable resistor
A transmission line/Power line
Power line
Outdoor unit
24
Separate interface/outdoor unit
power supplies
Power supply for interface
controller and power supply for
outdoor unit are supplied from the
different source.(Common power
source for local unit and interface
controller)
Refer to 3.2.
Note:
• REMOTE SWITCH Type A (4bit - 8 setting) / Type B (1bit -1 setting)
Circuit rating
DC12V
The figure is NOT
always against the
ground.
Only the operation
with remote
controller is valid.
(External signal is
invalid)
Refer to 6.
Refer to 6.
2
)
Refer to 7.
Refer to 7.
Refer to 7.
Refer to 7.
Refer to 8, 9.
Refer to 8, 9.
Refer to 8, 9.
Refer to 8, 9.
Available
Refer to 10.
Connect adaptor to
outdoor unit.
M-NET converter
PAC-SF80MA-E
A-Control sub
Interface
PAC-SK82SI-E
Available
Refer to 10.
Connect adaptor to
outdoor unit.
M-NET converter
PAC-SF80MA-E
A-Control sub
Interface
PAC-SK82SI-E
Not available
Not available
25
System structure(2)
Outdoor unit capacity switch
4-20mA
Capacity switch of outdoor
unit according to the signal
of 4-20mA
1-5V
Capacity switch of outdoor
unit according to the signal
of 1-5V
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Intake temp.
Liquid pipe temp.
Local unit
Local controller
System diagramPower supply specifications
Power supplied from outdoor unit
A transmission line/Power line
Power supply for interface
controller is supplied from the
outdoor unit.
Refer to 3.1.
Interface controller
4-20mA
Power line
Outdoor unit
Separate interface/outdoor unit
Power line
A transmission line/Power line
power supplies
Power supply for interface
controller and power supply for
Interface controller
4-20mA
Power line
Outdoor unit
outdoor unit are supplied from the
different source.
(Common power source for local
unit and interface controller)
Refer to 3.2.
Power supplied from outdoor unit
A transmission line/Power line
Power supply for interface
controller is supplied from the
outdoor unit.
Interface controller
1-5V
Power line
Outdoor unit
Refer to 3.1.
0-10V
Capacity switch of outdoor
unit according to the signal
of 0-10V
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Intake temp.
Liquid pipe temp.
Local unit
Local controller
Power line
Interface controller
1-5V
Interface controller
0-10V
Power line
Interface controller
0-10V
A transmission line/Power line
Power line
Outdoor unit
A transmission line/Power line
Power line
Outdoor unit
A transmission line/Power line
Power line
Outdoor unit
Separate interface/outdoor unit
power supplies
Power supply for interface
controller and power supply for
outdoor unit are supplied from the
different source.
(Common power source for local
unit and interface controller)
Refer to 3.2.
Power supplied from outdoor unit
Power supply for interface
controller is supplied from the
outdoor unit.
Refer to 3.1.
Separate interface/outdoor unit
power supplies
Power supply for interface
controller and power supply for
outdoor unit are supplied from the
different source.
(Common power source for local
unit and interface controller)
Refer to 3.2.
26
Attachment of sensor
Refer to 4.
Pipe-thermistor/
2-phase might be
neccessary
depending on the
type of the outdoor
unit.
Refer to 4.
Pipe-thermistor/
2-phase might be
neccessary
depending on the
type of the outdoor
unit.
Interface controller
switch setting
SW1-1:ON
SW1-2:ON
SW1-3:OFF
SW6-1:ON
SW6-2:ON
Other switches are
to be set according
to the site.
Refer to 5 for details.
Interface controller specifications
Input and wiringOutput and wiring
Refer to 6.
Refer to 6.
Refer to 7.
Refer to 7.
Other functions/setting
Maintenance
Refer to 8, 9.
Refer to 8, 9.
Connection with
BMS/MELANS
Not available
Not available
Refer to 4.
Pipe-thermistor/
2-phase might be
neccessary
depending on the
type of the outdoor
unit.
Refer to 4.
Pipe-thermistor/
2-phase might be
neccessary
depending on the
type of the outdoor
unit.
Refer to 4.
Pipe-thermistor/
2-phase might be
neccessary
depending on the
type of the outdoor
unit.
SW1-1:ON
SW1-2:ON
SW1-3:OFF
SW6-1:OFF
SW6-2:ON
Other switches are
to be set according
to the site.
Refer to 5 for details.
SW1-1:OFF
SW1-2:OFF
SW1-3:ON
SW6-1:OFF
SW6-2:OFF
Other switches are
to be set according
to the site.
Refer to 5 for details.
Refer to 6.
Refer to 6.
Refer to 6.
Refer to 7.
Refer to 7.
Refer to 7.
Refer to 8, 9.
Refer to 8, 9.
Refer to 8, 9.
Not available
Not available
Not available
Refer to 4.
Pipe-thermistor/
2-phase might be
neccessary
depending on the
type of the outdoor
unit.
Refer to 6.
27
Refer to 7.
Refer to 8, 9.
Not available
3. Power Supply
Interface controller is applicable to both methods of interface unit power supplied from outdoor unit, and of separate interface
unit/outdoor unit power supplies. Choose one according to the site.
(Photo. 3-1)
Inlet for control cable
A
Inlet for power
B
Clamp
C
Interface / Outdoor unit connecting terminals
D
Earth terminal
E
D
A
3.1. Interface unit power supplied from outdoor unit (Photo 3-2)
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
D
L
ABC
N
S1
S2
S3
E
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Interface unit/outdoor unit connecting cables
F Interface unit
F
S1
S2
S3
C
Photo.3-1
C
E
B
Photo.3-2
Interface unit modelPAC-IF011B-E
)
2
Interface unit-Outdoor unit *13× 1.5 (polar)
size
Interface unit-Outdoor unit earth*11 × Min.1.5
Wiring
(mm
Wire No.×
Interface unit-Outdoor unit S1-S2*2AC 230 V
rating
Circuit
*1. Max. 80 m
*2. The fi gures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Interface unit-Outdoor unit S2-S3*2DC24 V
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cables and interface unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed fl exible cable. (Design 60245 IEC 57)
3. Install an earth longer than other cables.
28
3.2. Separate interface unit/outdoor unit power supplies
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
D
L
N
A
CB
GEB
S1
S2
S3
C
F
L
N
S1
S2
S3
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Interface unit/outdoor unit connecting cables
F Interface unit
G Interface unit power supply
If the interface and outdoor units have separate power supplies, refer to the table below.
Separate power supply
specifi cations
Interface unit controller connector (CNS2) connection
change
Disconnected
Photo. 3-3
CNS2
Outdoor unit DIP switch settings (when using separate interface unit/outdoor unit power
supplies only)
ON
OFF
Set the SW8-3 to ON.
12
3
(SW8)
Interface unit modelPAC-IF011B-E
Interface unit power supply ~/N (Single Phase), 50 Hz, 230 V
Interface unit input capacity
Main switch (Breaker)
)
Interface unit power supply & earth3 × Min. 1.5
2
Interface unit-Outdoor unit*2 2 × Min. 0.3
size
Wire
No.×
Wiring
(mm
Interface unit-Outdoor unit earth –
*1 16 A
Interface unit L-N*3AC230V
Interface unit-Outdoor unit S1-S2*3 –
rating
Circuit
*1. A breaker with at least 3.0mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2. Max. 120 m
*3. The fi gures are NOT always against the ground.
Interface unit-Outdoor unit S2-S3*3DC24V
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cables and interface unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed fl exible cable. (Design 60245 IEC 57)
3. Install an earth longer than other cables.
29
4. Connecting thermistor
4.1 Connecting thermistor cable
Connect the thermistor for the interface controller.
When the thermistor cables are too long, cut it to the appropriate length.
Do not bind it in the interface unit.
1. Target temp. thermistor (TH1)
Connect the thermistor for the target temp. to 1 and 2 on
the terminal block (TB61) on the interface controller.
2. Pipe temp. thermistor / Liquid (TH2)
Connect the thermistor for the pipe temp. to 3 and 4 on
the terminal block (TB61) on the interface controller.
3. Pipe temp. thermistor / 2-phase (TH5).
Connect the thermistor for the 2-phase temp. to 5 and 6
on the terminal block (TB61) on the interface controller.
Set the DIP switch 2-6 to OFF of the interface controller.
Caution:
Do not route the thermistor cables together with power cables.
The sensor part of the thermistor should be installed where user must not touch.
(It is separated by the supplementary insulation from where user may touch.)
TB61
TH1
TH2
TH5
Photo. 4-1
4.2 Thermistor position
< Target temp. thermistor (TH1) > (Used only in *auto step mode (Only for Air to Air applications))
1. Put thermistor(TH1) where average intake temperature for heat exchanger can be detected.
2. It is better to put thermistor(TH1) where radiant heat from heat exchanger can be avoided.
To use this interface for manual step control, put a fi xed resistor of 4~10kΩ instead of thermistor.(TH1 on the terminal block
TB61)
* Auto step mode: In this mode, the capacity step of the outdoor unit is controlled automatically to let the target (intake)
temperature reach the set temperature.(Only for air to air application)
< Liquid pipe thermistor (TH2) >
1. Put thermistor(TH2) where liquid refrigerant pipe temperature can be detected.
2. It is better to protect the thermistor(TH2) with heat insulating materials not to be affected by the ambient temperature, etc.
3. In case that the refrigerant is distributed by distributor, put thermistor(TH2) before the distributor.
*Only for Air to Air application (Refer to page.4)
*Only in AUTO STEP mode of the I/F (Refer to page.4)
1. 2 phase pipe thermistor must be located where the 2 phase (condensing / evaporating) temperature of HEX can be meas-
ured.
2. Preferably, it should be insulated to avoid any infl uences by the ambient air temperature and so.
3. It must be located where it does NOT measure hot gas/subcool liquid temperature in heating mode.
4. If HEX is divided into several paths, 2 phase pipe thermistor should be put on the upper path.(Liquid refrigerant tends to stay
in the lower path when HEX works as a condenser, and the improper temperature may possibly be picked up.)
5. 2 phase thermistor should be located in the middle of the path. If it is impossible to put it in the middle, it should be put a bit
inlet side of condenser. Do NOT move it too much to the inlet side, however, as it may possibly pick up hot gas temperature.
(Never put it on the outlet side of condenser as it may pick up subcool liquid temperature.)
30
<Thermistor Characteristic graph>
Thermistor for
lower temperature
Target temperature thermistor (TH1)
Pipe temperature thermistor/liquid (TH2)
Pipe temperature thermistor / 2-phase (TH5)
Thermistor R0 =15k" ± 3%
Fixed number of B =3480 ± 2%
SW2-7, 8 : OFF fi xed (Initial setting)
SW3 : LED2~5 display setting (Refer to 8.)
31
6. Input specifi cations
Demand control is available by external input.
It is possible to set the outdoor unit’s power consumption by setting the switch of the interface controller.
• REMOTE SWITCH Type A (4bit - 8 setting) / Type B (1bit -1 setting)
Demand control is available by connecting remote switches with terminal No.10 - 14.
Make sure to use the non-voltage switch (for the remote switch).
Remote switch cable length : Maximum 10m
Remote switch : Minimum applicable load DC12V, 1mA
*The values of the above table show the mid-point of each step range.
tolerance : 0-10kΩ : ±5%
4-20mA : ±0.4mA
1-5V : ±0.1V
0-10V : ±0.2V
Cable length : Maximum 10m
Step1
Step4
Step7
TB62
I/F
10
11
12
13
14
TB142
TB142
Photo. 6-1
32
• External function setting
This function is to set operation mode or to stop compressor by the external signal.
TB142 ItemOFF ONRemark
1-2 (IN1)Forced Comp. OFFNormalForced Comp. OFF
3-4 (IN2)ItemFixed operation modeCoolingHeatingAvailable when SW2-1 and SW2-2 are ON
Caution:
The external input signals are separated by basic insulation from power
supply for the unit.
The external input signals should be separated by supplementary insulation from where user may touch in case that it is installed where user
may touch.
Connect the terminals by using the ring terminals and also insulate the
cables of adjoining terminals when wiring to terminal block.
Cable length : Maximum 50m
Output specifi cation : Non-voltage switch 1A or less , 240V AC
*Connect the surge absorber according to the load at site.
I/F
At site
X1
X2 X3 X4 X5 X6
21354678
9
10 1 1 12 13 14
TB141
TB142
2134
Note :
External output signals are separated by basic insulation from other circuit of interface.
Caution :
When 2 or more external outputs are used, the power
supply on the output side should be the same.
Wiring specifi cation of External output / External input
Locally supplied parts
ItemNameModel and specifi cations
External output
function
External output
signal wire
Use sheathed vinyl coated cord or cable.
Wire type
: CV, CVS or equivalent.
Wire size : Stranded wire 0.5mm
Solid wire: [0.65mm to [1.2mm
Display lamp, etc. Non-voltage Contact AC220-240V (DC30V), 1A or less
External input
function
External input
signal wire
Use sheathed vinyl coated cord or cable.
Wire type
: CV, CVS or equivalent.
Wire size : Stranded wire 0.5mm
Solid wire : [0.65mm to [1.2mm
SwitchNon-voltage "a" contact
33
2
to 1.25mm
2
to 1.25mm
Photo.3-6
TB141
2
2
8. LED Display detail
Setting SW3 allows to switch the LED display.
LED1 : Power supply
LED2~4 : Setting SW3 switches the display
Connecting wired remote controller(PAR-21MAA) enables to display the error information.
Note: In case of using for ATW, the refrigerant leakage defection function of the outdoor unit is not available.
9.1. Connecting wired remote controller
Turn off the power supply.
TB62 : Connect the wired remote controller wire to No. 5, 6(non-polar).
Note : Be sure to turn off the power supply before disconnecting the wired remote controller wire. Otherwise it may
cause trouble or to activate abnormality alarm.
9.2. Wired remote controller display
● Operation buttons
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Timer On/Off button
(Set Day button)
● Display
Display Section
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohibited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Back
Ahead
Opening the
lid
TEMP.
MENU
ON/OFF
MONITOR/SET
BACKDAY
PAR-21MAA
CLOCK
OPERATION
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.
TIME SUN MON TUE WED THU FRI SAT
TIMER
AFTER
ERROR CODE
°F°C
Hr
AFTER
°F°C
ONLY1Hr.
Up/Down Air Direction indicator
The indicator shows the direction of the outcoming airflow.
“One Hour Only” indicator
Displayed if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in 1 hour,
when the airflow direction
also changes.
Room Temperature display
Shows the room temperature. The room
temperature display range is 8~39˚C.
The display blinks if the temperature
is less than 8˚C or 39˚C or more.
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(Power On indicator)
Indicates that the power is on.
ON/OFF
FILTER
CHECK
TEST
CLEAR
Built-in temperature sensor
ON
OFF
FUNCTION
FILTER
WEEKLY
SIMPLE
AUTO OFF
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To return operation
number
Ventilation button
( Operation button)
To go to next operation
number
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller buttons have been locked.
“Clean The Filter” indicator
To be displayed on when it is time to
clean the filter.
Timer indicators
The indicator comes on if the corresponding timer is set.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
35
9.3. How to proceed "self-diagnosis"
9.3.1. When a Problem Occurs During Operation
If a problem occurs in the air conditioner, the indoor and outdoor units will stop,
and the problem is shown in the remote controller display.
[CHECK] and the refrigerant address are displayed on the
temperature display, and the error code and unit number are
displayed alternately as shown below. (If the outdoor unit is
malfunctioning, the unit number will be “00”.)
In the case of group control, for which one remote controller controls
multiple refrigerant systems, the refrigerant address and error code of
the unit that first experienced trouble (i.e., the unit that transmitted
the error code) will be displayed.
To clear the error code, press the button.
ON/OFF
Error code (2 or 4 digits)
(Alternating Display)
Address (3 digits) or unit number (2 digits)
When using remote-/local-controller combined operation, cancel the error code after turning off remote operation. During
central control by a MELANS controller, cancel the error code by pressing the
ON/OFF
button.
Self-Diagnosis During Maintenance or Service
Since each unit has a function that stores error codes, the latest check code can be recalled even if it is cancelled by the remote
controller or power is turned off.
Check the error code history for each unit using the remote controller.
Switch to self-diagnosis mode.
Press the
will change as shown below.
CHECK
button twice within 3 seconds. The display content
Unit number or refrigerant address
to be diagnosed
Set the unit number or refrigerant address you want to diagnose.
Press the [TEMP] buttons ( and ) to select the desired number
or address. The number (address) changes between [01] and [50] or [00]
and
[15].
The refrigerant address will begin to blink
approximately 3 seconds after being
selected and the self-diagnosis process will begin.
Display self-diagnosis results.
<When there is error code history>
(For the definition of each error code, refer to the indoor unit's installation manual or service handbook.)
(Alternating Display)
Error code (2 or 4 digits)
<When there is no error code history><When there is no corresponding unit>
Reset the error history.
Display the error history in the diagnosis result display screen (see step
Address (3 digits) or unit number (2 digits)
).
36
Press the
address or refrigerant address will blink.
Cancel self-diagnosis.
Self-diagnosis can be cancelled by the following 2 methods.
Press the
Press the
ON/OFF
CHECK
ON/OFF
button twice within 3 seconds. The self-diagnosis
button twice within 3 seconds. Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the
button. Self-diagnosis will be cancelled and the indoor unit will stop.
start of self-diagnosis.
When the error history is reset, the display will look like the one shown below.
However, if you fail to reset the error history, the error content will be displayed
again.
9.3.2. Remote Controller Diagnosis
If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.
First, check that the power-on indicator is lit.
If the correct voltage (DC12 V) is not supplied to the remote controller, the
indicator will not light.
If this occurs, check the remote controller's wiring and the indoor unit.
Power on indicator
Switch to the remote controller self-diagnosis mode.
Press the
change as shown below.
CHECK
button for 5 seconds or more. The display content will
Press the
FILTER
button to start self-diagnosis.
Remote controller self-diagnosis result
[When the remote controller is functioning correctly]
Check for other possible causes, as there is no problem with the remote
controller.
There might be noise or interference on the transmission path, or the indoor
unit or other remote controllers are defective. Check the transmission path
and other controllers.
The remote controller must be replaced with a new one.
(Error display 3)
The number of data errors is the difference between the number of bits sent
from the remote controller and the number actually transmitted through the
transmission path. If such a problem is occurring, the transmitted data is
affected by noise, etc. Check the transmission path.
When the number of data errors is "02":
Transmission data from remote controller
Transmission data on transmission path
To cancel remote controller diagnosis
Press the
approximately 30 seconds, the state in effect before the diagnosis will be restored.
CHECK
button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will blink. After
37
9.3.3. Malfunction-diagnosis method by remote controller
Refer to the following tables for details on the check codes.
Errors detected by indoor unit
Check codeSymptomRemark
P1Intake sensor error
P9Pipe (TH5) sensor error
P2Pipe (TH2) sensor error
E6,E7Interface controller/outdoor unit communication error
P6Freezing/Overheating protection operation
EECommunication error between indoor and outdoor units
P8Pipe temperature error
E4, E5Remote controller signal receiving error
——
——
FbInterface controller system error (memory error, etc.)
E0, E3Remote controller transmission error
E1, E2Remote controller control board error
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Check codeSymptomRemark
E8
E9
UPCompressor overcurrent interruption
U3,U4Open/short of outdoor unit thermistors
UFCompressor overcurrent interruption (When compressor locked)
U2Abnormal high discharging temperature/insuffi cient refrigerant
U1,Ud
U5Abnormal temperature of heatsink
U8Outdoor unit fan protection stop
U6Compressor overcurrent interruption/Abnormal of power module
U7Abnormality of superheat due to low discharge temperature
U9,UH
——
——
OthersOther errors (Refer to the technical manual for the outdoor unit.)
Interface controller/outdoor unit communication error
(Signal receiving error)
Interface controller/outdoor unit communication error
(Transmitting error) (Outdoor unit)
Abnormal high pressure (63H worked)/Overheating protection operation
Abnormality such as overvoltage or voltage shortage and abnormal
synchronous signal to main circuit/Current sensor error
For details, check the LED display
of the outdoor controller board.
—
38
If the unit cannot be operated properly after test run, refer to the following table to find the cause.
•
Symptom
Wired remote controllerLED 1, 2 (PCB in outdoor unit)
PLEASE WAIT
PLEASE WAIT Error code
Display messages do not
appear even when operation
switch is turned ON (operation
lamp does not light up).
Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED1, 2, 3) provided on the interface controller, refer to the following table.
Display detail A (SW 3-1 = OFF, SW 3-2 = OFF, SW 3-3 = OFF)
For about 2
minutes after
power-on
Subsequent to
about 2 minutes
after power-on
After LED 1, 2 are lighted, LED 2 is
turned off, then only LED 1 is
lighted.
(Correct operation)
Only LED 1 is lighted.
Only LED 1 is lighted.
LED 1, 2 blink.
LED 1 blinks twice,
LED 2 blinks once.
•
For about 2 minutes following power-on,operation of the remote controller is not possible
due to system start-up. (Correct operation)
•Connector for the outdoor unit’s protection
device is not connected.
•Reverse or open phase wiring for the outdoor
unit’s power terminal block (L1, L2, L3)
•Incorrect wiring between interface controller
and outdoor (incorrect polarity of S1, S2, S3)
•Remote controller wire short
Cause
LED1 (power for microcomputer)Indicates whether control power is supplied. Make sure that this LED is
LED2 (power for remote controller)Indicates whether power is supplied to the remote controller.
LED3 (communication between Interface controller
and outdoor units)
always lit.
This LED lights only in the case of the Interface controller which is connected
to the outdoor unit refrigerant addresses “0”.
Indicates state of communication between the Interface controller and outdoor
units.
Make sure that this LED is always blinking.
39
Error code indication
You can check an error code on both 1 and 2.
LCD display on remote controller
1
2-digit LED indicator on outdoor unit PCB
2
SELF-DIAGNOSIS ACTION TABLE
Error CodeAbnormal point and detection method CauseCountermeasure
P1
Target Temperature thermistor (TH1)
The unit is in 3-minute resume
1
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3
minutes. (The unit returns to normal
operation, if it has been reset normally.)
Constantly detected during cooling,
2
drying, and heating operation.
Short: -90: or more
Open: -40: or less
1
characteristics
2
3
failure of thermistor wiring
4
(For SPLIT type outdoor unit, this LED indicator is optional parts.PAC-SK52ST)
* The 2-digit LED indicator on outdoor unit PCB can display indoor side error as well.
Defective thermistor
Contact failure of connector on
the interface controller board
(Insert failure)
Breaking of wire or contact
Defective interface controller
board
Check resistance value of thermistor.
1–3
0: 15.0k
10: 9.6k
20: 6.3k
30: 4.3k
40: 3.0k
If you put force on (draw or bend) the lead wire
with measuring resistance value of thermistor,
breaking of wire or contact failure can be
detected.
Check contact failure of connector on the
2
interface controller board.
Turn the power on again and check restart
after inserting connector again.
Check <target> temperature display on
4
remote controller.
Replace interface controller board if there is
abnormal difference with actual <target>
temperature.
Turn the power off, and on again to operate
after check.
"
"
"
"
"
P2
P9
Pipe temperature thermistor/Liquid
(TH2)
The unit is in 3-minute resume
1
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3
minutes. (The unit returns to normal
operation, if it has been reset normally.)
Constantly detected during cooling,
2
drying, and heating (except defrosting)
operation
Short: 90: or more
Open: -40: or less
Pipe temperature thermistor / 2-phase
(TH5)
The unit is in 3-minute resume protection
1
mode if short/open of thermistor is
detected. Abnormal if the unit does not
get back to normal within 3 minutes. (The
unit returns to normal operation, if it has
been reset normally.)
Constantly detected during cooling,
2
drying, and heating operation (except
defrosting)
Short: 90: or more
Open: -40: or less
Defective thermistor
1
characteristics
Contact failure of connector on
2
the interface controller board
(Insert failure)
Breaking of wire or contact
3
failure of thermistor wiring
Defective refrigerant circuit is
4
causing thermistor temperature
of 90: or more or -40: or
less.
Defective interface controller
5
board
Defective thermistor
1
characteristics
Contact failure of connector on
2
the interface controller board
(Insert failure)
Breaking of wire or contact
3
failure of thermistor wiring
Temperature of thermistor is
4
90: or more or -40: or less
caused by defective refrigerant
circuit.
Defective interface controller
5
board
Check resistance value of thermistor.
1–3
For characteristics, refer to (P1) above.
Check contact failure of connector on the
2
interface controller board.
Turn the power on and check restart after
inserting connector again.
Check pipe <liquid> temperature with remote
4
controller in test run mode. If pipe <liquid>
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.
Check pipe <liquid> temperature with
5
remote controller in test run mode. If there is
extremely difference with actual pipe <liquid>
temperature, replace interface controller
board.
Turn the power off, and on again to operate
after check.
Check resistance value of thermistor.
1–3
For characteristics, refer to (P1) above.
Check contact failure of connector on the
2
interface controller board.
Turn the power on and check restart after
inserting connector again.
Operate in test run mode and check pipe
4
<2-phase> temperature with outdoor
controller circuit board. If pipe <2-phase>
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defect.
Operate in test run mode and check pipe
5
<2-phase> temperature with outdoor control
circuit board. If there is
extreme difference with actual pipe
<2-phase> temperature, replace interface
controller board.
There is no abnormality if none of above
comes within the unit.
Turn the power off and on again to operate.
40
In case of checking pipe temperature
with outdoor controller circuit board,
be sure to connect A-control service
(
tool (PAC-SK52ST).
)
Error Code
Abnormal point and detection method
Freezing/overheating protection is
working
Freezing protection (Cooling mode)
1
The unit is in 6-minute resume
prevention mode if pipe <liquid or
2-phase> temperature stays under
-15: for 3 minutes, 3 minutes after
the compressor started. Abnormal if it
stays under -15: for 3 minutes again
within 16 minutes after 6-minute resume
prevention mode.
Cause
(Cooling or drying mode)
Clogged fi lter (reduced airfl ow)
1
Short cycle of air path
2
Low-load (low temperature)
3
operation out of the tolerance
range
Defective indoor fan motor
4
• Fan motor is defective.
• Indoor controller board is
defective.
Countermeasure
(Cooling or drying mode)
Check clogs of the fi lter.
1
Remove shields.
2
Check indoor fan motor.
4
P6
P8
Overheating protection (Heating mode)
2
The units is in 6 minute resume
prevention mode if pipe <2-phase>
temperature is detected as over 70:
after the compressor started. Abnormal if
the temperature of over 70: is detected
again within 30 minutes after 6 minute
resume prevention mode.
Pipe temperature
<Cooling mode>
Detected as abnormal when the pipe
temperature is not in the cooling range
3 minutes after compressor start and 6
minutes after the liquid or 2-phase pipe is
out of cooling range.
Note 1) It takes at least 9 minutes to detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : -3 °C ] (TH-TH1)
TH: Lower temperature between: liquid
pipe temperature (TH2) and 2-phase
temperature (TH5)
TH1: Target temperature
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has fi nished, the unit is
detected as abnormal when 2-phase pipe
temperature is not in heating range within
20 minutes.
Defective outdoor fan control
5
Overcharge of refrigerant
6
Defective refrigerant circuit
7
(clogs)
(Heating mode)
Clogged fi lter (reduced airfl ow)
1
Short cycle of air path
2
Over-load (high temperature)
3
operation out of the tolerance
range
Defective indoor fan motor
4
• Fan motor is defective.
• Indoor controller board is
defective.
Defective outdoor fan control
5
Overcharge of refrigerant
6
Defective refrigerant circuit
7
(clogs)
Bypass circuit of outdoor unit is
8
defective.
Slight temperature difference
1
between TH1
temperature and pipe <liquid
or 2-phase>
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
<liquid or 2-phase> thermistor
• Defective refrigerant circuit
Converse connection of
2
extension pipe (on plural units
connection)
Converse wiring of interface/
3
outdoor unit connecting wire (on
plural units connection)
Defective detection of
4
target temperature and pipe
<2-phase>
temperature thermistor
Stop valve is not opened
5
completely.
Check outdoor fan motor.
5
Check operating condition of refrigerant
67
circuit.
(Heating mode)
Check clogs of the fi lter.
1
Remove shields.
2
Check indoor fan motor.
4
Check outdoor fan motor.
5
Check operating condition of refrigerant
6~8
circuit.
Check pipe <liquid or 2-phase>
1~4
temperature with target temperature
display on remote controller and outdoor
controller circuit board.
Pipe <liquid or 2-phase> temperature
display is indicated by setting SW2
of outdoor controller circuit board as
follows.
Conduct temperature check with outdoor
controller circuit board after connecting
(
‘A-Control Service Tool(PAC-SK52ST)’.
Check converse connection of extension
23
pipe or converse wiring of interface/outdoor
unit connecting wire.
)
Note 3) It takes at least 27 minutes to
detect abnormality.
Note 4) It excludes the period of defrosting.
(Detection restarts when defrosting
mode is over.)
cannot receive any transmission normally
from Interface unit of refrigerant address
“0” for 3 minutes.
(Error code: E0)
Abnormal if sub-remote controller could
2
not receive any signal for 2 minutes.
(Error code: E0)
Abnormal if Interface controller board
1
can not receive any data normally from
remote controller board or from other
Interface controller board for 3 minutes.
(Error code: E4)
Interface controller board cannot receive
2
any signal from remote controller for 2
minutes. (Error code: E4)
Contact failure at transmission
1
wire of remote controller
All remote controllers are set
2
as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at LED (LED1, LED2)
on the outdoor controller circuit
board.
Miswiring of remote controller
3
Defective transmitting receiving
4
circuit of remote controller
Noise has entered into the
5
transmission wire of remote
controller.
Judgment and actionCase
Check disconnection or looseness of
1
Interface unit or transmission wire of remote
controller.
Set one of the remote controllers “main”, If
2
there is no problem with the action above.
Check wiring of remote controller.
3
• Total wiring length: max. 500 m
(Do not use cablex 3 or more.)
• The number of connecting remote
controller: max. 2 units
When it is not the above-mentioned problem of
~
1
3
Diagnose remote controllers.
4
a) When “RC OK” is displayed, remote
controllers have no problem.
Turn the power off, and on again to check.
If abnormality generates again, replace
Interface controller board.
b) When “RC NG” is displayed, replace
remote controller.
c) When “RC E3” or “ERC 00-66” is displayed,
noise may be causing abnormality.
E1
E2
E3
E5
Remote controller control board
Abnormal if data cannot be read normally
1
from the nonvolatile memory of the
remote controller control board.
fi nd blank of transmission path for 6
seconds and could not transmit.
(Error code: E3)
When remote controller receives
2
the transmitted data same time and
compares these data. Abnormal if the
data is judged to be different for 30
continuous times. (Error code: E3)
Abnormal if Interface controller board
1
could not fi nd blank of transmission path.
(Error code: E5)
When Interface controller receives
2
the transmitted data same time and
compares these data. Abnormal if the
data is judged to be different for 30
continuous times. (Error code: E5)
Defective remote controller
1
2 remote controllers are set as
1
“main.”
(
In case of 2 remote controllers
Defective transmitting receiving
2
circuit of remote controller
Defective transmitting receiving
3
circuit of Interface controller
board
Noise has entered into
4
transmission wire of remote
controller.
Replace remote controller.
1
Set a remote controller to main, and the
1
other to sub.
)
Diagnose remote controller.
2~4
a) When “RC OK” is displayed, remote
controllers have no problem.
Turn the power off, and on again to check.
When becoming abnormal again, replace
interface controller board.
b) When “RC NG” is displayed, replace
remote controller.
c) When “RC E3” or “ERC 00-66” is
displayed, noise may be causing
abnormality.
42
Error Code
E6
Abnormal point and detection method Judgment and action
Interface unit/outdoor unit
communication error (Signal receiving
error)
Abnormal if Interface controller board
1
cannot receive any signal normally for 6
minutes after turning the power on.
Abnormal if Interface controller board
2
cannot receive any signal normally for 3
minutes.
Contact failure, short circuit
1
or, miswiring (converse wiring)
of Interface unit/outdoor unit
connecting wire
Defective transmitting receiving
2
circuit of Interface controller
board
Defective transmitting receiving
3
circuit of Interface controller
board
Noise has entered into Interface
4
unit/outdoor unit connecting
wire.
Case
* Check LED display on the outdoor control
circuit board. (Connect A-control service tool,
PAC-SK52ST.)
Check disconnection or looseness of
1
Interface unit/outdoor unit connecting wire of
Interface unit or outdoor unit.
~
Turn the power off, and on again to
2
4
check. If abnormality generates again,
replace Interface controller board or
outdoor controller circuit board.
E8
E9
EF
Interface unit/outdoor unit
communication error (Signal receiving
error)
(Outdoor unit)
Abnormal if outdoor controller circuit board
could not receive anything normally for 3
minutes.
Interface unit/outdoor unit
communication error (Transmitting
error) (Outdoor unit)
(1) Abnormal if “0” receiving is detected
30 times continuously though outdoor
controller circuit board has transmitted
“1”.
(2) Abnormal if outdoor controller
circuit board could not fi nd blank of
transmission path for 3 minutes.
Non defi ned error code
This code is displayed when non defi ned
error code is received.
Contact failure of Interface unit/
1
outdoor unit connecting wire
Defective communication circuit
2
of outdoor controller circuit
board
Defective communication circuit
3
of Interface controller board
Noise has entered into Interface
4
unit/outdoor unit connecting
wire.
Interface unit/outdoor unit
1
connecting wire has contact
failure.
Defective communication circuit
2
of outdoor controller circuit
board
Noise has entered power
3
supply.
Noise has entered Interface
4
unit/outdoor unit connecting
wire.
Noise has entered transmission
1
wire of remote controller.
Noise has entered Interface
2
unit/outdoor unit connecting
wire.
Check disconnection or looseness of
1
Interface unit/outdoor unit connecting wire of
Interface unit or outdoor unit.
Turn the power off, and on again to
2~4
check. Replace Interface controller
board or outdoor controller circuit board
if abnormality is displayed again.
Check disconnection or looseness of
1
Interface unit/outdoor unit connecting wire.
Turn the power off, and on again to
2~4
check. Replace outdoor controller circuit
board if abnormality is displayed again.
Turn the power off, and on again to check.
12
Replace Interface controller board
or outdoor controller circuit board if
abnormality is displayed again.
Ed
Serial communication error
Abnormal if serial communication between
outdoor controller circuit board and outdoor
power circuit board is defective.
Wire disconnection or contact
1
failure of connector CN2
between the outdoor controller
circuit board and the outdoor
power circuit board
Wire disconnection or contact
2
failure of connector CN4
between the outdoor controller
circuit board and the outdoor
power circuit board
Defective communication circuit
3
of outdoor power circuit board
Defective communication circuit
4
of outdoor controller circuit board
for outdoor power circuit board
43
Check connection of each connector CN2
12
and CN4 between the outdoor controller
circuit board and the outdoor power circuit
board.
Replace outdoor power circuit board.
3
Replace outdoor controller circuit board.
4
9.3.4. HOW TO "MONITOR THE OPERATION DATA"
• Turn on the [Monitoring the operation data]
(3)
Example) Request code "004"
Discharge temperature 69
Refrigerant address "00"
(7)
(5)
(1)
(2)
(4)
(1)Press the
(2)Press the
Note)
Operating the service inspection monitor
- - - ] appears on the screen (at
[
(The display (at
(3)Press the [TEMP] buttons (
[Screen]
(4)Press the [CLOCK] buttons ( and ) to set the desired request code No.
(5)Press the
(The requested data will be displayed at
Data collected during operation of the remote controller will be displayed.
The collected data such as temperature data will not be updated automatically even if the data changes.
To display the updated data, carry out step (4) again.
TEST
CHECK
It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while "
since no buttons are operative.
FIL TER
button for 3 seconds so that [ Maintenance mode] appears on the screen (at ).
button for 3 seconds to switch to [Maintenance monitor].
) when [Maintenance monitor] is activated.
) now allows you to set a request code No.)
and ) to select the desired refrigerant address.
button to perform data request.
in the same way as in maintenance mode.)
(6)
A: Maintenance mode
B: Refrigerant address
C: Data display area
D: Request code display area
- - - -"
is blinking)
Canceling the Monitoring the operation data
(6)While [Maintenance monitor] is displayed, press the
(7)To return to normal mode, press the
ON/OFF
CHECK
button.
button for 3 seconds to return to maintenance mode.
44
9.4. Request code list
* Certain interface/outdoor combinations do not have the request code function; therefore, no request codes are displayed.
Request content
Request code
Operation state
0
Compressor-Operating current (rms)
1
Compressor-Accumulated operating time
2
Compressor-Number of operation times
3
Discharge temperature (TH4)
4
Outdoor unit - Liquid pipe 1 temperature (TH3)
5
Outdoor unit - Liquid pipe 2 temperature
6
Outdoor unit-2-phase pipe temperature (TH6)
7
8
Outdoor unit-Suction pipe temperature (TH32)
Outdoor unit-Outside air temperature (TH7)
9
Outdoor unit-Heatsink temperature (TH8)
10
11
Discharge superheat (SHd)
12
Sub-cool (SC)
13
14
15
Compressor-Operating frequency
16
Compressor-Target operating frequency
17
Outdoor unit-Fan output step
18
Outdoor unit-Fan 1 speed
19
(Only for air conditioners with DC fan motor)
Outdoor unit-Fan 2 speed
20
(Only for air conditioners with DC fan motor)
21
LEV (A) opening
22
LEV (B) opening
23
24
LEV (C) opening
Primary current
25
DC bus voltage
26
27
28
Number of connected indoor units
29
Interface unit-Setting temperature
30
Interface unit-T arget temperature <Measured by thermostat>
31
Interface unit-Target temperature (Unit No. 1)
32
<Heat mode-4-deg correction>
Interface unit-Target temperature (Unit No. 2)
33
<Heat mode-4-deg correction>
Interface unit-Target temperature (Unit No. 3)
34
<Heat mode-4-deg correction>
Interface unit-Target temperature (Unit No. 4)
35
<Heat mode-4-deg correction>
36
Interface unit - Liquid pipe temperature (Unit No. 1)
37
Interface unit - Liquid pipe temperature (Unit No. 2)
38
Interface unit - Liquid pipe temperature (Unit No. 3)
39
Interface unit - Liquid pipe temperature (Unit No. 4)
40
41
Interface unit-2-phase. pipe temperature (Unit No. 1)
42
Interface unit-2-phase. pipe temperature (Unit No. 2)
43
Interface unit-2-phase. pipe temperature (Unit No. 3)
44
Interface unit-2-phase. pipe temperature (Unit No. 4)
45
46
47
Thermostat ON operating time
48
Test run elapsed time
49
Description
(Display range)
Refer to 9.4.1. Detail Contents in Request Code.
0 – 50
0 – 9999
0 – 9999
3 – 217
-40 – 90
-40 – 90
-39 – 88
-39 – 88
-39 – 88
-40 – 200
0 – 255
0 – 130
0– 255
0– 255
0– 10
0 – 9999
0 – 9999
0– 500
0– 500
0– 500
0– 50
180 – 370
0– 4
17 – 30
8– 39
8– 39
8– 39
8– 39
8– 39
-39 – 88
-39 – 88
-39 – 88
-39 – 88
-39 – 88
-39 – 88
-39 – 88
-39 – 88
0 – 999
0– 120
10 hours
100 times
Step
Pulses
Pulses
Pulses
Units
Minutes
Minutes
UnitRemarks
–
A
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
Hz
Hz
rpm
rpm
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
"0" is displayed if the air conditioner is a single-fan
type.
A
V
"0" is displayed if the target unit is not present.
is displayed if the target unit is not present.
"0"
is displayed if the target unit is not present.
"0"
Not possible to activate maintenance mode during the test run.
45
Request content
Request code
Interface unit-Control state
50
Outdoor unit-Control state
51
Compressor-Frequency control state
52
Outdoor unit-Fan control state
53
Actuator output state
54
Error content (U9)
55
56
57
58
59
Signal transmission demand capacity
60
Contact demand capacity
61
External input state (silent mode, etc.)
62
63
64
65
66
67
68
69
Outdoor unit-Capacity setting display
70
Outdoor unit-Setting information
71
72
Outdoor unit-SW1 setting information
73
Outdoor unit-SW2 setting information
74
75
Outdoor unit-SW4 setting information
76
Outdoor unit-SW5 setting information
77
Outdoor unit-SW6 setting information
78
Outdoor unit-SW7 setting information
79
Outdoor unit-SW8 setting information
80
Outdoor unit-SW9 setting information
81
Outdoor unit-SW10 setting information
82
83
M-NET adapter connection (presence/absence)
84
85
86
87
88
89
Display of execution of replace/wash operation
Outdoor unit-Microcomputer version information
90
Outdoor unit-Microcomputer version information (sub No.)
91
92
93
94
95
96
97
98
99
Outdoor unit - Error postponement history 1 (latest)
100
Outdoor unit - Error postponement history 2 (previous)
101
Outdoor unit - Error postponement history 3 (last but one)
102
Description
(Display range)
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
0 – 255
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
Refer to 9.4.1.Detail Contents in Request Code.
"0000": Not connected
"0001": Connected
"0000": Not washed
"0001": Washed
Examples) Ver 5.01
"0501"
Auxiliary information (displayed after
version information)
Examples) Ver 5.01 A000
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
"A000"
Code
Code
Code
UnitRemarks
–
–
–
–
–
–
%
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Ver
–
46
Request content
Request code
Error history 1 (latest)
103
Error history 2 (second to last)
104
Error history 3 (third to last)
105
Abnormal thermistor display
106
(TH3/TH6/TH7/TH8)
Operation mode at time of error
107
Compressor-Operating current at time of error
108
Compressor-Accumulated operating time at time of error
109
Compressor-Number of operation times at time of error
110
Discharge temperature at time of error
111
Outdoor unit - Liquid pipe 1 temperature (TH3) at time of error
112
Outdoor unit - Liquid pipe 2 temperature at time of error
113
Outdoor unit-2-phase pipe temperature (TH6) at time of error
114
115
Outdoor unit-Outside air temperature (TH7) at time of error
116
Outdoor unit-Heatsink temperature (TH8) at time of error
117
Discharge superheat (SHd) at time of error
118
Sub-cool (SC) at time of error
119
Compressor-Operating frequency at time of error
120
Outdoor unit at time of error
121
• Fan output step
Outdoor unit at time of error
122
• Fan 1 speed (Only for air conditioners with DC fan)
Outdoor unit at time of error
123
• Fan 2 speed (Only for air conditioners with DC fan)
124
LEV (A) opening at time of error
125
LEV (B) opening at time of error
126
127
128
129
Thermostat ON time until operation stops due to error
130
131
Interface - Liquid pipe temperature at time of error
132
Interface-2-phase pipe temperature at time of error
133
Interface at time of error
134
• T arget temperature <Thermostat judge temperature>
135
136
137
138
139
140
~
146
147
148
149
Interface-Actual intake air temperature
150
Interface-Liquid pipe temperature
151
Interface-2-phase pipe temperature
152
153
~
767
Description
(Display range)
Displays error history. (" - - " is displayed if no history is present.)
Displays error history. (" - - " is displayed if no history is present.)
Displays error history. (" - - " is displayed if no history is present.)
Displayed in the same way as request code "0".
0– 50
0 – 9999
0 – 9999
3– 217
-40 – 90
-40 – 90
-39 – 88
-39 – 88
-40 – 200
0– 255
0– 130
0– 255
0– 10
0 – 9999
0 – 9999
0– 500
0– 500
0 – 999
-39 – 88
-39 – 88
-39 – 88
-39 – 88
-39 – 88
-39 – 88
UnitRemarks
Code
Code
Code
Sensor
number
–
A
10 hours
100 times
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
Hz
Step
rpm
rpm
Pulses
Pulses
Minutes
˚C
˚C
˚C
˚C
˚C
˚C
"0" is displayed if the air conditioner is a single-
fan type.
Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).
Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).
47
9.4.1 Detail Contents in Request Code
Example) Request code "004"
Discharge temperature 69
Refrigerant address "00"
[Interface unit – Control state] (Request code :"50 ")
Data display
Unit No. 4 state
Unit No. 3 state
Unit No. 2 state
Unit No. 1 state
DisplayState
Power currently
supplied to compressor
0
1
2
3
4
5
6
7
8
A
0Normal
1Preparing for heat operation
2–
3–
4Heater is ON.
5Anti-freeze protection is ON.
6Overheat protection is ON.
7Requesting compressor to turn OFF
FThere are no corresponding units.
–
ON
ON
Compressor4-way valveSolenoid valve
–
ON
ON
ON
ON
–
ON
ON
ON
ON
ON
–
ON
ON
ON
ON
[Outdoor unit – Control state] (Request code ":51")
Data displayState
0000Normal
0001Preparing for heat operation
0002Defrost
[Compressor – Frequency control state] (Request code ":52")
Data display
00
Frequency control state
Frequency control state
Frequency control state
DisplayCurrent limit control
0No current limit
1Primary current limit control is ON.
2Secondary current limit control is ON.
Fan step correction value by heatsink temperature overheat prevention control
Fan step correction value by cool condensation temperature overheat prevention control
DisplayCorrection value
- (minus)– 1
00
1
2
+1
+2
[Actuator output state] (Request code :"54")
Data display
00
Actuator output state
Actuator output state
Actuator output state
DisplaySV14-way valveCompressor
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
Compressor is
warming up
ON
ON
ON
ON
ON
ON
ON
ON
Actuator output state
Display52CSV2SS
0
1
2
3
4
5
6
7
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
[Error content (U9)] (Request code :"55")
Data display
00
Error content
Error content
Error content : Detected
Display
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
OvervoltageUndervoltageL1-phase
errorerroropen error
Power synchronizing
signal error
Error content : Detected
0
1
2
3
Converter Fo
error
PAM error
Display
49
[Contact demand capacity] (Request code "61")
Data display
000
Setting content
[External input state] (Request code "62")
Data display
000
Input state
Setting content
ON
ON
Setting
ON
DisplaySetting value
0
150%
275%ON
3100%
Input state : Input present
Display
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
0%
Contact demandSilent modeSpare 1Spare 2
inputinputinputinput
SW7-1SW7-2
[Outdoor unit - Capacity setting display] (Request code : "70")
Data display
935
1050
1160
1471
20100
25125
28140
40200
50250
Capacity
[Outdoor unit - Setting information] (Request code "71")
Data display
00
Setting information
Setting information
Setting information
DisplayDefrost mode
0Standard
1For high humidity
Setting information
Display
0
1
2
3
Single-/Heat pump/
3-phase
Single-phase
3-phase
cooling only
Heat pump
Cooling only
Heat pump
Cooling only
50
[Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82
When connected with the outdoor unit, M-NET converter and A-control sub Interface can be connected to MELANS and BMS,
which enables the central control available.
As for the demand control setting, the central control is not available in the fi xed capacity mode. However, with the wired remote
controller method(Auto step mode), the central control is available.
Operation with MELANS / BMS
Set the switch from the following setting according to the specifi cations of the local unit.
Ex. Local unit with only heating : select the 2 or 3 below.
Operation function : ON/OFF, operation mode change, the set temperature change
Operation function : ON/OFF, the set temperature change
2
Switch setting
SW1-1=OFF SW1-2=ON SW1-3=ON SW1-4~8=OFF
SW2-3~5=OFF SW 2-6=ON SW2-7,8=OFF
(Operation mode is determined by the setting of SW2-1, 2. MELANS and BMS cannot operate this setting.)
Operation function : ON/OFF, operation mode change
3
Switch setting
SW1-1=OFF SW1-2=ON SW1-3=ON SW1-4~8=OFF
SW1,2=OFF SW 2-6=ON SW2-7,8=OFF
(Set temperature is determined by the setting of SW2-3~5. MELANS and BMS cannot operate this setting.)
Operation function : ON/OFF
4
Switch setting
SW1-1=OFF SW1-2=ON SW1-3=ON SW1-4~8=OFF
SW 2-6=ON SW2-7,8=OFF
(Operation mode and set temperature are determined by the setting of SW2-1~5. MELANS and BMS cannot operate this
setting.)
Intake temp.
Liquid pipe temp.
Local unit
Wired remote
controller
Intake temp.
Liquid pipe temp.
Local unit
Wired remote
controller
Interface controller
PAR-21MAA
Interface controller
PAR-21MAA
A transmission line/Power line
Power line
Outdoor unit
A transmission line/Power line
Power line
Outdoor unit
M-NET converter
A-Control sub Interface
MELANS
BMS
M-NET converter
A-Control sub Interface
52
11. Outlines and dimensions
Unit : mm
TB61TB62
3-ELECTRIC WIRE INLET
336
313
(11.5)11.5
Ø5
Ø12
TB141TB142
TB6
22
10
2-HOLES
(FOR
INSTALLATION)
200
278
(FOR
INSTALLATION)
Ø5 HOLES
2-
69
53
12. Troubleshooting
A flowing water sound or occasional hissing
sound is heard.
Water does not heat or cool well.
Water or vapor is emitted from the outdoor unit.
■
Thease sounds can be heard when refrigerant is fl owing in the indoor
unit, refrigerant pipe or when the refrigerant is chaging.
■
Clean the fi lter of water piping. (Flow is reduced when the fi lter is dirty
or clogged.)
■
Check the temperature adjustment and adjust the set temperature.
■
Make sure that there is plenty of space around the outdoor unit.
■
During cooling mode, water may form and drip from the cool pipes and
joints.
■
During heating mode, water may form and drip from the heat exchanger
of outdoor unit.
■
During defrosting mode, water on the heat exchanger of outdoor unit
evaporates and water vapor may be emitted.
54
Flow temp. controller (FTC)5
CONTENTS
1. System ..............................................................................................56
8. Outlines and dimensions ..................................................................89
5555
1. System
To start, check your system type by following the fl ow chart below.(FTC can be used for 3 types of systems.)
Start
Heat Pump switch ON/OFF
and the operation mode
change is done…
By external signals from local controller
(non-voltage contact signals)
‘Target flow temperature’ is set…
By external signals from local controller
(Analog signal:4-20mA/ 1-5V/ 0-10V)
Your system is ANALOG TEMP. SYSTEM.
By remote controller
By remote controller
Your system is
SIMPLE SYSTEM.
Your system is
BASIC SYSTEM.
SIMPLE SYSTEMBASIC SYSTEMANALOG TEMP. SYSTEM
By Non-voltage
Contact signals
FTC PCB BOXFTC PCB BOXFTC PCB BOX
ON/OFF
Operation mode
Target flow temp.
Remote controller
End user interface
Target flow temp.
Remote controller
To preset
- target temp. foreach mode
- target temp. parameters
ON/OFF
Operation mode
- Heating
- Heating ECO
- Hot water
- Anti freeze
- Cooling
System controller
(locally supplied)
End user interface
Remote controller
Topreset
- analog signal parameters
By Non-voltage
Contact signals
ON/OFF
Operation mode
- Heating +
- Cooling
Target flow temp.
Analog signal
4-20mA/1-5V/0-10V
+In this system,
• Heating ECO mode of FTC is
• It is NOT necessary to switch
System controller
(locally supplied)
End user interface
not available.
operation mode to realize
Hot water mode, Anti freeze
mode and Heating ECO mode.
Simply change the target temp.
by Analog signal.
56
Refer to the relevant sections for details according to your system type.
SystemSystem diagram
BASIC
Outdoor
unit
SPLIT type
Local controller
ON/OFF
MODE
TH1
TH2
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
Power
supplies
2.1
2.1.1
Thermistor
(TH1, TH2)
2.2.1
2.2.2
Switch
setting
2.2
External
input
2.5.1
External
output
2.6
ANALOG
TEMP.
PACKAGED
type
SPLIT type
PACKAGED
type
Local controller
ON/OFF
MODE
Local controller
ON/OFF
MODE
Local controller
ON/OFF
MODE
Local controller
ON/OFF
Temp.
Local controller
ON/OFF
Temp.
Local controller
ON/OFF
Temp.
TH1
TH2
TH1
TH1
TH1
TH2
TH1
TH2
TH1
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
2.1
2.1.2
2.1
2.1.1
2.1
2.1.2
2.1
2.1.1
2.1
2.1.2
2.1
2.1.1
2.2.1
2.2.2
2.2.1
2.2.1
2.2.1
2.2.2
2.2.1
2.2.2
2.2.1
2.2
2.2
2.2
2.2
2.2
2.2
2.5.1
2.5.1
2.5.1
2.5.1
2.5.2
2.5.1
2.5.2
2.5.1
2.5.2
2.6
2.6
2.6
2.6
2.6
2.6
SIMPLE
SPLIT type
PACKAGED
type
Local controller
ON/OFF
Temp.
TH1
TH1
TH2
TH1
TH2
TH1
TH1
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
FTCOutdoor unit
FTC
Remote controller
(PAR-W21MAA)
2.1
2.1.2
2.1
2.1.1
2.1
2.1.2
2.1
2.1.1
2.1
2.1.2
2.2.1
2.2.1
2.2.2
2.2.1
2.2.2
2.2.1
2.2.1
2.2
2.2
2.2
2.2
2.2
SPLIT type : the standard outdoor unit without a plate HEX(Refrigetant-water HEX) inside
PACKAGED type : the Air to Water outdoor unit with a plate HEX(Refrigetant-water HEX) inside
2.5.1
2.5.2
2.6
2.6
—
2.6
—
2.6
—
2.6
—
57
2. Electrical work
2.1. FTC (Photo. 2-1)
1. Remove the cover.
2. Wire the power cable and control cable separately through the
respective wiring inlets given in the photo.
• Make sure to put screws tightly.
Inlet for control cable
A
Inlet for power
B
Clamp
C
FTC / Outdoor unit connecting terminals
D
Earth terminal
E
D
C
C
Photo.2-1
A
E
B
2.1.1. FTC unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit must be powered properly.(Details are shown in its installation manual.)
ABC
D
L
N
S1
S2
S3
E
F
S1
S2
S3
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E FTC unit/outdoor unit connecting cables
F FTC unit
TB6
S2 S3S1
NL
E: FTC unit/outdoorunit
connecting cables
Earth cable
Photo.2-2
FTC unit modelPAC-IF021B-E
Wiring Wire No. × size (mm²)
Circuit rating
*1. Max. 80 m
*2. The fi gures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
FTC unit-Outdoor unit 3× 1.5 (polar)
FTC unit-Outdoor unit earth1 × Min.1.5
FTC unit-Outdoor unit S1-S2AC 230 V
FTC unit-Outdoor unit S2-S3DC24 V
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Power supply cables and FTC unit/outdoor unit connecting cables shall not be lighter than polychloroprene
sheathed fl exible cable. (Design 60245 IEC 57)
3. Install an earth wire longer than other cables.
58
2.1.2. Separate FTC unit/outdoor unit power supplies
The following connection patterns are available.
The outdoor unit power must be powered properly(Details are shown in its installation manual).
D
L
N
A
CB
GEB
S1
S2
S3
C
F
L
N
S1
S2
S3
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E FTC unit/outdoor unit connecting cables
F FTC unit
G FTC unit power supply
If the FTC and outdoor units have separate power supplies, refer
to the table below.
Separate power supply specifi cations
Photo.2-3
FTC unit controller connector
(CNS2) connection change
Outdoor unit DIP switch settings (when using separate FTC
unit/outdoor unit power supplies
only)
TB6
NL
CNS2
Disconnected
ON3
OFF12
Set the SW8-3 to ON.
S2 S3S1
(SW8)
Power SupplyCables
FTC unit modelPAC-IF021B-E
FTC unit power supply ~/N (Single Phase), 50 Hz, 230 V
FTC unit input capacity
Main switch (Breaker)
)
2
FTC unit power supply & earth 3 × Min. 1.5
(mm
FTC unit-Outdoor unit*2 2 × Min. 0.3
Wiring
FTC unit-Outdoor unit earth –
Wire No. ×
size
*1 16 A
FTC unit L-N*3 AC 230 V
FTC unit-Outdoor unit S1-S2*3 –
rating
Circuit
FTC unit-Outdoor unit S2-S3*3 DC24 V
*1. A breaker with at least 3.0mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2. Max. 120 m
*3. The fi gures are NOT always against the ground.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cables and FTC unit/outdoor unit connecting cables shall not be lighter than polychloroprene
sheathed fl exible cable. (Design 60245 IEC 57)
3. Install an earth wire longer than other cables.
E: FTC unit/outdoor unit
connecting cable
59
2.2. Connecting thermistor cable
Connect the thermistor 2 for the FTC controller.
2.2.1.
Connecting the actual fl ow water temp. thermistor
(TH1)
Connect the thermistor for the actual fl ow water temp. to 1 and
2 on the terminal block (TB61) on the FTC controller.
When the thermistor cables are too long, cut them at the appropriate length.
Do not bind them in the FTC unit.
<Thermistor position>
Put TH1 on
piping (water
water
outlet
side).
Note: Be sure to attach the TH1 where it detects Flow
temp.(Water oulet side) correctly.
2.2.2. Connecting the pipe temp. thermistor (TH2)
Connect the thermistor for the refrigerant pipe temp. to 3 and 4
on the terminal block (TB61) on the FTC (PCB).
For packaged Outdoor unit : It is not necessary to connect TH2.
For split Outdoor unit : Connect TH2.
When the thermistor cables supplied with FTC are too long, cut them to the appropriate length.
Do not bind them in the FTC unit.
TB61
TH1
TH2
TB62
Wired remote controller cable
Photo.2-4
<Thermistor position>
Put the TH2 on
refrigerant
piping (
Liquid
side).
It is better to protect the thermistor with heat insulating materials not to be affected by the ambient temperature.
Note: Be sure to attach the TH2 where it detects Refrigerant piping temp. (Liquid side) correctly.
Caution:
Do not route the thermistor cables together with power cables.
The sensor part of the thermistor should be installed where user must not touch.
(It is separated by the supplementary insulation from where user may touch.)
<Thermistor position and necessity>
Outdoor unitTH1TH2TH5
PACKAGED typeΟХ Х
SPLIT typeΟΟХ
Ο: Necessary. Connect the thermistor.
Х: Not necessary. The thermistor is not needed to connect.
PACKAGED type outdoor unitSPLIT type outdoor unit
Water OUTLET side
Outdoor unit
TH1
FTC
TH2:
not necessary
Outdoor unit
Refrigerant LIQUID side
FTC
Water OUTLET side
TH1
*1
Water piping
Packaged type
(with a refrigerant-water HEX inside)
*1 Refrig
TH2
erant-water HEX
<Thermistor Characteristic graph> Refer to section 4.2 of I/F.
IT type
SPL
(without refrigerant-water
HEX inside)
60
Refrigerant piping
TH2
*1
*1 Refrig
Water piping
erant-water HEX
30120
83.5
46
3030
2.3. Connecting the wired remote controller
2.3.1.
Connecting the wired remote controller cable to FTC
Connect the wired remote controller cable to 5 and 6 on the terminal block (TB62) on the FTC controller.(Photo. 2-4)
Wiring wire No.×size(mm
The 5m wire is attached as an accessory. Max. 500 m
2
) : 2×0.3(Non-polar)
Wiring size must comply with the applicable local and national
codes.
Circuit rating: DC12V
Circuit rating is NOT always against the ground.
Fig. 2-1
B-1.B-2.
Fig. 2-2
-3
Fig. 2
BTB
A6
2.3.2. For wired remote controller
1) Installing procedures
(1)
Select an installing position for the remote controller. (Fig. 2-1)
Required clearances surrounding the remote controller
B
Installation pitch
C
(2)Seal the service entrance for the remote controller cable with
putty to prevent possible invasion of dew drops, water, cockroaches or insects. (Fig. 2-2)
For installation in the switch box
A
For direct installation on the wall, select one of the follow-
B
ings:
• Prepare a hole through the wall to pass the remote controller
cable (in order to take out the remote controller cable from
the back), then seal the hole with putty.
• Take out the remote controller cable through the cut-out upper case, then seal the cut-out notch with putty.
B-1. To lead the remote controller cable from the back of
the controller
B-2. To take out the remote controller cable through the up-
per portion
[Fig.2-2]
Wall
C
Conduit
D
Lock nut
E
Bushing
F
Switch box
G
Remote controller cable
H
Seal with putty
I
Wood screw
J
2) Connecting procedures (Fig. 2-3)
Connect the remote controller cable to the terminal block.
1
To TB62 No.5 and 6 on the FTC unit
A
TB6 (No polarity)
B
61
2.4. Switch setting of FTC
Set the dip switch on the FTC (PCB) according to the following table.
*1: 4-20mA····OFF: 0~2mA
*2: 1-5V····OFF: 0~0.5V
*3: The command from the external input is prior to the one from the wired remote controller.
*4: SPLIT type : the standard outdoor unit without a plate HEX(refrigerant-water) inside.
PACKAGED type : the Air to Water outdoor unit with a plate of HEX(refrigerant-water) inside
*1. Don’t use this setting when you use the standard outdoor unit without a plate HEX(Refrigerant-water) inside.
SW2-1~8, SW3-1~3
1
2
SW1
SW2
SW3
62
SW2-1~8 SW3-1~3 Fixed set temperature with DIP switch of FTC (Available when SW1-6 is ON)
SW2-1~3 Fixed set temperature for Heating mode (Table1~2 depends on SW1-7,8.)
The selectable temperature range for Heating mode depends on outdoor unit type.
*1 Do not use this setting when you use the standard outdoor unit without a plate HEX(refrigerant-water) inside.
SW2-4~6 Fixed set temperature for Hot Water mode (Table1~2 depends on SW1-7,8.)
The selectable temperature range for Hot Water mode depends on outdoor unit type.
*1 Do not use this setting when you use the standard outdoor unit without a plate HEX(refrigerant-water) inside.
SW2-7,8 Fixed set temperature for Anti-freeze mode (Table1~2 depends on SW1-7,8.)
10-13(COM-IN7)OFFHot Water
10-14(COM-IN8)OFFAnti-Freeze
*1 Heating ECO mode sets the set temperature depending on the outdoor temperature.
TB142
3579 11 131
Forced Comp. OFF
Cooling
Heating
HeatingECO
Hot Water
Anti-Freeze
4268101214
At site
FTC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TB142
63
2.5.2 EXTERNAL INPUT ( analog signal ) 4-20mA / 1-5V / 0-10V
Connect the transmission cables to No. 3 and 4 on the terminal block (TB62).
No. 3 on the terminal block(TB62) : Plus side
No. 4 on the terminal block(TB62) : Minus side (Reference side)
Refer to the section 8 for details about No1, 2 Temp.
The selectable set temperature range depends on SW1-7, 8.
Caution:
TB141
Photo.2-6
The external input signals are separated by basic insulation from power supply for the unit.
The external input signals should be separated by supplementary insulation from where user may touch in case that
it is installed where user may touch.
Connect the terminals by using the ring terminals and also insulate the cables of adjoining terminals when wiring to
terminal block.
External output signals are separated by basic insulation from other circuit of interface.
Caution :
When 2 or more external outputs are used, the power supply on the output side should
be the same.
X1
1FTC
2 3X24 5X36 7X48 9
TB141
357911131
X5
X6 X7
42
6 8 10 12 14
1413121110
TB141
64
2.7. Wiring specifi cation of External output / External input
Locally supplied parts
ItemNameModel and specifi cations
External output functionExternal output signal wireUse sheathed vinyl coated cord or cable.
Max. 50m
Wire type : CV, CVS or equivalent
Wire size : Stranded wire 0.5mm
2
to 1.25mm
2
Solid wire: {0.65mm to {1.2mm
Display lamp, etc.Non-voltage Contact AC220-240V (DC30V), 1A or less
*Connect the surge absorber according to the load at site.
External input functionExternal input signal wireUse sheathed vinyl coated cord or cable.
Max. 10m
Wire type : CV, CVS or equivalent
Wire size : Stranded wire 0.5mm
2
to 1.25mm
2
Solid wire : {0.65mm to {1.2mm
SwitchNon-voltage "a" contact signals
Remote switch : minimum applicable load DC 12V, 1mA
3. Before test run
3.1. Check
After completing installation and the wiring and piping of the local application and outdoor units, check for refrigerant leakage,
looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply.
Use a 500-volt megohmmeter to check that the resistance between the power supply terminals and ground is at least 1.0MΩ.
Warning:
Do not use the system if the insulation resistance is less than 1.0MΩ.
Caution:
Do not carry out this test on the control wiring (low voltage circuit) terminals.
ERROR CODE
3.2. Self-check
Turn on the power.
1
Press [CHECK] button twice.
2
Press [CHECK] button twice to fi nish self-check.
3
CHECK button BIC : FTC unit OC : Outdoor unit CCheck code
A
Check codeSymptom
P1Flow water (TH1) sensor error
TEMP.
ON/OFF
P2Refrigerant liquid Pipe (TH2) sensor error
P6Freezing/Overheating protection operation
FbFTC unit control system error (memory error, etc.)
E0~E5Signal transmission failure between remote controller and FTC.
E6~EFSignal transmission failure between outdoor unit and FTC.
– – – –No trouble generated in the past.
FFFFNo corresponding unit
U*, F*Outdoor unit failure. Refer to the outdoor unit wiring diagram.
For description of each LED(LED1~5) provided on the FTC, refer to the following table.
LED 1 (Power for microcomputer)Indicates whether control power is supplied. Make sure that this LED is always lit.
LED 2 (Power for remote controller)Indicates whether power is supplied to the remote cotroller. This LED lights only in
the case of the FTC unit which is connected to the outdoor unit refrigerant address “0“.
LED 3(Communication between FTC
and outdoor unit)
Indicates state of communication between the FTC and outdoor unit. Make sure that
this LED is always blinking.
LED 4—
LED 5—
65
4. Remote controller operation
4.1 Parts name
■
Wired Remote-Controller
Display Section
For purposes of this
explanation, all parts of
the display are shown.
During actual operation,
only the relevant items
will be displayed.
Identifi es the current operation
Shows the operating mode,
etc.
* Multi language display is
supported.
“Centrally Controlled” indicator
Indicates that operation of
the remote controller has
been prohibited by a master
controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Operation Section
Set Temperature buttons
Down
Up
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless
the simple or Auto Off timer is
set.
If the simple or Auto Off timer is
set, shows the time remaining.
TIME SUN MON TUE WED THU FRI SAT
TIMER
AFTER
ERROR CODE
˚F˚C
ON/OFF indicator
Indicates if timer is set ON/
OFF.
ON
Hr
OFF
AFTER
˚F˚C
FUNCTION
WEEKLY
“Locked” indicator
Indicates that remote
controller buttons have been
locked.
Timer indicators
The indicator comes on if the
corresponding timer is set.
Error indicator
Comes on when error occurs.
Temperature indicator
Shows the current water
temperature.
(Power On indicator)
Indicates that the power is
on.
ON/OFF button
Setting change button
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
CIR. WATER button
(<Enter> button)
Set Time buttons
TEMP.
ON/OFF
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
lid
Not available
TEST run function is not
available with this FTC
unit.
Self check(Clear) button
Note:
● “PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the FTC unit or when the unit
is recovering from a power failure.
● “NOT AVAILABLE” message
This message is displayed if a button is pressed to operate a function that the FTC unit does not have, or a func-
tion that is not available due to the setting.
66
Function Selection of
remote controller
Standard Control Screens
OFFON
2
1
2
TEMP.
˚C
TIME SUN
TIME SUN
Set Day/Time
TIME SUN
˚C
1
Day of the
Week & Time
˚C
ON/OFF
display
9
4
Day of the Week Setting
3
Time Setting
4
<Screen confi guration>
For details on setting the language for the remote controller display, refer to 4.6. Function Selection.
The initial language setting is English.
● Function Selection of remote controller:
Set the functions and ranges available to the
● Set Day/Time:Set the current day of the week or time.
● Standard Control Screens:
View and set the air conditioning system’s
operating status
<How to change the screen>
: Hold down both the Mode button 2 and the Timer On/Off
A
button 9 for 2 seconds.
: Press either of the Set Time buttons (
B
: Press the Mode button 2.
c
or ) 1.
4.2 Setting the day of the week and time
1. Press the or Set Time button 1 to show display 2.
2. Press the Timer On/Off (Set Day) button 9 to set the day.
* Each press advances the day shown at 3 :
Sun → Mon → ... → Fri → Sat.
3. Press the appropriate Set Time button 1 as necessary to set
the time.
* As you hold the button down, the time (at 4) will increment
first in one-minute intervals, then in ten-minute intervals,
and then in 1-hour intervals.
4. After making the appropriate settings at Steps 2 and 3, press
the button 4 to lock in the values.
Note:
The day and time will not appear if clock use has been disabled at Function Selection of remote controller.
TEMP.
˚C
˚C
ON/OFF
1
1
4.3 Operation
Available items are different depending on your system.
(Refer to section 3.)
4.3.1 Switching
<To Start Operation>
■ Press the ON/OFF button 1.
• The ON lamp 1 and the display area come on.
Note:
When the unit restarts, the previous settings are recalled as
follows.
Remote controller setting
ModeLast operation mode
Temperature settingLast set temperature
<To Stop Operation>
■
Press the ON/OFF button
1
again.
• The ON lamp 1 and the display area go dark.
Note:
Even if you press the ON/OFF button to restart the system
while turning down the operation, the outdoor unit will not
start for about 3 minutes.
This is to prevent the internal components from being damaged.
67
4.3.2. Mode select
Press operation mode () button2 and select operation mode.
Heating mode (Space heating)
Heating ECO mode (Space heating with weather compensation *1)
Hot water mode (Sanitary hot water)
Anti freeze mode (Heating to prevent water pipe from freezing)
Cooling mode (Space cooling)
*1 Target fl ow temp. varies according to the outdoor temperature.
(Refer to 5. for setting.)
3
2
2
3
˚C
TEMP.
˚C
ON/OFF
4.3.3. Temperature setting
► To decrease the target temperature:
Press
button 3 to set the desired temperature. The selected temperature is displayed 3.
► To increase the target temperature:
Press
button 3 to set the desired temperature. The selected temperature is displayed 3.
Note: Heating ECO mode sets the set temperature depending on the outdoor temperature.
4.4. Other Functions
4.4.1.
Locking the Remote Controller Buttons (Operation function limit)
■ If you wish, you can lock the remote controller buttons. You can use the Function Selection of remote controller to select which
type of lock to use.
(For information about the lock type, refer to 4.5, item[2].)
Specifi cally, you can use either of the following 2 lock types.
1 Lock All Buttons: Locks all of the buttons on the remote controller.
2 Lock All Except ON/OFF: Locks all buttons other than the ON/OFF button.
Note: The “Locked” indicator appears on the screen to indicate that buttons are currently locked.
˚C
TEMP.
TIME SUN
Lock Indicator
1
<How to Lock the Buttons>
1. While holding down the CIR. WATER button 4, press and hold
down the ON/OFF button 1 for 2 seconds. The “Locked” indication appears on the screen (at 1), indicating that the lock is now
FUNCTION
˚C
ON/OFF
1
4
engaged.
* If locking has been disabled in Function Selection of remote
controller, the screen will display the “Not Available” message
when you press the buttons as described above.
1
FUNCTION
˚C
˚C
• If you press a locked button, the “Locked” indication (at 1) will
blink on the display.
˚C
˚C
1
FUNCTION
<How to Unlock the Buttons>
1. While holding down the CIR. WATER button 4, press and hold
down the ON/ OFF button 1 for 2 seconds—so that the “Locked”
indication disappears from the screen (at 1).
68
˚C
˚C
1
4.4.2. Error Codes indication
ERROR CODE
ON lamp
Indoor Unit’s
ON/OFF
Error CodeIndoor Unit No.
(Blinking)
Refrigerant Address
If you have entered contact number to be called in the event of a problem,
Alternating Display
the screen displays this number. (You can set this up under Function
Selection of remote controller. For information, refer to 4.5.)
●
If the ON lamp and error code are both blinking: This means that the air conditioner is out of order and operation has been
stopped (and cannot resume). Take note of the indicated unit number and error code, then switch off the power to the air conditioner and call your dealer or servicer.
When the Check button is pressed:
ERROR CODE
˚C
˚C
ON/OFF
CALL:XXXX
XXX:XXX
ON/OFF
Error Code
●
If only the error code is blinking (while the ON lamp remains lit): Operation is continuing, but there may be a problem with the
system. In this case, you should note down the error code and then call your dealer or servicer for advice.
* If you have entered contact number to be called in the event of a problem, push the Check button to display it on the screen.
(You can set this up under Function Selection of remote controller. For information, refer to 4.5.)
4.5. Function Selection
Various remote controller functions are selectable in the remote controller function selection mode. Change setting when needed.
Item 1Item 2Item 3
1. Change language
(“CHANGE LANGUAGE”)
2. Function limit
(“FUNCTION SELECTION”)
3. Mode selection
(“MODE SELECTION”)
4. Display change
(“DISP MODE SETTING”)
Language setting to display• Some European languages are selectable.
(1) Operation function limit setting (operation lock)
(“LOCKING FUNCTION”)
(2) Use of operation mode setting (“SELECT
MODE”)
(3) Temperature range limit setting (“LIMIT TEMP
FUNCTION”)
(1) Remote controller main/sub setting
(“CONTROLLER MAIN/SUB”)
(2) Use of clock setting (“CLOCK”)• To select the use or non-use of clock function
(3) Timer function setting (“TIMER MODE”)• To select the timer type
(4) Contact number setting in case of fault
(“CALL.”)
(5) Temperature offset setting(“TEMP OFFSET
FUNCTION”)
(1) Temperature display °C/°F setting (“TEMP
MODE °C/°F”)
(2) Water temperature display setting(“WATER
TEMP. DISP. SELECT”)
• To invalidate some functions.
• Setting the use or non-use of operation mode
• Setting the temperature adjustable range (maximum,
minimum)
• Selecting main or sub remote controller
* When 2 remote controllers are connected to 1
group, 1 controller must be set to sub.
• Contact number display in case of error
• To select the telephone number
• To select the use or non-use of the water temperature offset funstion
• To select the temperature unit (°C or °F) to display
• To select the use or non-use of the display of “actual
Hold down the () button and press the () button for 2 seconds.
Hold down the () button and press the () button for 2 seconds.
Change
Language
Function
selection
English
GermanySpanish
SwedishFrench
Russian
Italian
OFFNo1
No2
Dot display
OFF … Operation lock setting is not used.(Initial setting)
No1 … Operation lock setting for all buttons except ON/OFF is active.
No2 … Operation lock setting for all button is active.
TEMP.
ON/OFF
Present setting:Select mode=OFF
Select mode = OFF
OFF
Present setting:Select mode=ON
Select mode = ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Select mode = OFF (Initial setting)
• All operation modes are available in
this mode.
Select mode = ON
• Selected mode is skipped.
OFF ···· Skipped
ON ···· Available
Present setting:Limit TEMP. = OFF
Limit TEMP. = OFF
OFF
Present setting:Limit TEMP. = ON
Limit TEMP. = ON
Lower limit
Upper limit
Lower limit
Upper limit
Lower limit
Upper limit
Limit TEMP. = OFF (Initial setting)
• Water temp. setting range : standard
Limit TEMP. = ON
• Water temp. setting range : limited
Lower limit ···· sets the lowest water
Upper limit ···· sets the highest water
* “LIMIT TEMP. HOT WATER” mode
( )
temperature.
temperature.
also limits the setting range in the
“Heating” mode.
Mode
selection
Display mode
setting
MAIN ····The remote controller will be the main controller.(Initial setting)
SUB ····The remote controller will be the sub controller.
ON
OFF
ON ····The crock function can be used.(Initial setting)
OFF ····The clock function can not be used.
*
TIMER MODE OFF : Timer mode can not used.(Initial setting)
WEEKLY TIMER : Weekly timer can be used.
*
AUTO OFF TIMER : Auto off timer can be used.
SIMPLE TIMER : Simple timer can be used.
* These are timer mode.
*
OFF
ON
OFF ····The set contact numbers are not displayed in case of error.
(Initial setting)
ON ····The set contact numbers are displayed in case of error.
ON
OFF
°C
°F
OFF
ON
ON ····The offset function of the water temperature can be used.
(Initial setting)
OFF ····The offset function of the water temperature can not be used.
°C ···· The temperature unit “°C” is used.(Initial setting)
°F ····The temperature unit “ °F” is used.
OFF ····Water temperature is displayed.(Initial setting)
ON ····Water temperature is not displayed.
70
[Detailed setting]
[4]-1 CHANGE LANGUAGE setting
The language that appears on the dot display can be selected.
• Press the [ MENU] button G to change the language.
English (GB), 2 German (D), 3 Spanish (E), 4 Russian (RU),
1
Italian (I), 6 French (F), 7 Swedish (SW)
5
Refer to the dot display table.
[4]-2 Function selection setting
(1) Operation function limit setting (operation lock)
• To switch the setting, press the [ ON/OFF] button D.
no1: Operation lock setting is made on all buttons other than the
1
[
no2: Operation lock setting is made on all buttons.
2
OFF (Initial setting value): Operation lock setting is not made.
3
ON/OFF] button I.
* To make the operation lock setting valid on the normal
screen, it is necessary to press buttons (Press and hold
down the [CIR.WATER] A and [
ON/OFF] buttons
I
at the same time for 2 seconds.) on the normal screen
after the above setting is made.
(2) Use of operation mode setting
When the remote controller is connected to the unit that has
the operation mode, the following settings can be made.
• To switch the setting, press the [
SELECT HEATING
1
ON· ....HEATING mode can be selected.
OFF ....HEATING mode is skipped.
SELECT HEATING ECO
2
ON· ....HEATING ECO mode can be selected.
OFF ....HEATING ECO mode is skipped.
SELECT HOT WATER
3
ON· ....HOT WATER mode can be selected.
OFF ....HOT WATER mode is skipped.
SELECT ANTI-FREEZE
4
ON· ....ANTI-FREEZE mode can be selected.
OFF ....ANTI-FREEZE mode is skipped.
SELECT COOLING
5
ON· ....COOLING mode can be selected.
OFF ....COOLING mode is skipped.
SELECT MODE OFF(Initial setting value)
6
ON/OFF] button D.
The all operation mode is displayed when the mode is selected.
(3) Temperature range limit setting
After this setting is made, the temperature can be changed
within the set range.
• To switch the setting, press the [ ON/OFF] button D.
LIMIT TEMP HOT WATER MODE:
1
The temperature range can be changed on hot water /
heating mode.
LIMIT TEMP ANTI-FREEZE MODE:
2
The temperature range can be changed on anti-freeze
mode.
LIMIT TEMP COOLING MODE:
3
The temperature range can be changed on cooling mode.
OFF (initial setting):
4
The temperature range limit is not active.
* When the setting other than OFF is made, the
temperature range limit setting on heating, hot water,
anti-freeze, and cooling mode is made at the same time.
However, the range cannot be limited when the set
temperature range has not changed.
• To increase or decrease the temperature, press the [
TEMP. (
) or ( )] button F.
• To switch the upper limit setting and the lower limit setting,
press the [
INITIAL SETTING] button H. The selected
setting will blink and the temperature can be set.
[4]-3 Mode selection setting
(1) Remote controller main/sub setting
• To switch the setting, press the [ ON/OFF] button D.
Main: The controller will be the main controller.
1
Sub: The controller will be the sub controller.
2
(2) Use of clock setting
• To switch the setting, press the [
ON: The clock function can be used.
1
OFF: The clock function cannot be used.
2
ON/OFF] button D.
(3) Timer function setting
• To switch the setting, press the [
ON/OFF] button D
(Choose one of the followings.).
WEEKLY TIMER:
1
The weekly timer can be used.
AUTO OFF TIMER:
2
The auto off timer can be used.
SIMPLE TIMER:
3
The simple timer can be used.
TIMER MODE OFF(Initial setting):
4
The timer mode cannot be used.
* When the use of clock setting is OFF, the “WEEKLY
TIMER” cannot be used.
(4) Contact number setting for error situation
• To switch the setting, press the [ ON/OFF] button D.
CALL OFF:
1
The set contact numbers are not displayed in case of
error.
CALL **** *** ****:
2
The set contact numbers are displayed in case of error.
CALL_:
The contact number can be set when the display is as
shown above.
• Setting the contact numbers
To set the contact numbers, follow the following
procedures.
Move the blinking cursor to set numbers. Press the [
TEMP. (
right (left). Press the [ CLOCK (
) and ( )] button F to move the cursor to the
) and ( )] button C
to set the numbers.
(5) Use of water temperature offset function
• To switch the setting, press the [
ON:
1
2
The water temperature offset function can be used.
The water temperature offset function cannot be used.
OFF:
ON/OFF] button D.
* Refer to page 23 for details of offset function.
[4]-4 Display change setting
(1) Temperature display °C/°F setting
• To switch the setting, press the [
°C: The temperature unit °C is used.
1
°F: The temperature unit °F is used.
2
ON/OFF] button D.
(2) Water temperature display setting
• To switch the setting, press the [
ON: Water temperature is displayed.
1
OFF: Water temperature is not displayed.
2
ON/OFF] button D.
71
[Dot display table]
Selecting language
Waiting for start-up
Operation modeHeating
Heating ECO
Hot water
Anti-freeze
Cooling
Stand by
(Hot adjust)
Defrost
Not use button
Check (Error)
Test run
Self check
Change language
Language selection
Display change
Temperature display ˚C/˚F setting
Water temperature
display setting
Function selection
Operation function limit setting
English German Spanish Russian Italian French Swedish
Selecting language
Mode skip setting
Mode skip
Temperature range limit setting
Temperature
range limit setting
mode
Mode selection
Remote controller setting MAIN
Remote controllersetting SUB
Use of clock setting
Setting the day of the week and
time
Contact number setting
Temperature off set function
Temperature off set function
(Heating)
Temperature off set function
(Cooling)
Timer set
Timer monitor
Timer mode off
Timer function setting
Simple timer
Heating
Heating ECO
Hot water
Anti-freeze
Cooling
Hot water
Anti-freeze
Cooling
English German Spanish Russian Italian French Swedish
72
[Dot display table]
Selecting language
Auto off timer
Function selection
Check (Error)
Test run
Self check
Colective setting
Water temperature
(Initial setting)
Option setting(Heating)
Option setting(Cooling)
Water circuit check
Waiting for response
Waiting for setting
Not dealt with
Maintenance
English German Spanish Russian Italian French Swedish
Heating
Heating ECO
Hot water
Anti-freeze
Cooling
73
5. Initial setting by remote controller
(1) Press the button for 3 seconds to activate the initial setting mode.
(2) [DISPLAY ]
WATER TEMP
HEATING
* No.1 or No.2 is indicated in display .
Press button to switch to the next parameter setting.
<Target temperature in heating mode>
WATER TEMP
HEATING
INITIAL SETTING
WATER TEMP
HEATING ECO
WATER TEMP
HEATING ECO
WATER TEMP
HOT WATER
WATER TEMP
ANTI-FREEZE
No. 1*No. 2*
MODE
Set target flow water temperature in Heating mode with [TEMP] buttons ( and ) .
WATER TEMP
COOLING
˚C
TEMP.
TEMP OFFSET
HEATING
˚C
ON/OFF
TEMP OFFSET
COOLING
<Parameters for Heating ECO mode>
Set following 4 parameters in HEATING ECO mode with [TEMP] buttons ( and ) .
HEATING ECO mode= Weather compensation mode
Target flow water temperature varies according to the outdoor temperature.
WATER TEMP
HEATING ECO
WATER TEMP
HEATING ECO
Press button to switch alternately. (The blinking figure can be changed.)
· Heating ECO mode sets the set temperature depending on the outdoor temperature.
· The parameters except the above 4 parameters cannot be set. (The characteristic is linear between the point A and B.)
· When the “EXTERNAL INPUT(analog signal)” is used, the “HEATING ECO MODE” is invalid.
<Target temperature in HOT WATER mode>
WATER TEMP
HOT WATER
Set target flow water temperature in HOT WATER mode with [TEMP] buttons ( and ) .
<Target temperature in ANTI-FREEZE mode>
WATER TEMP
ANTI-FREEZE
Set target flow water temperature in ANTI-FREEZE mode with [TEMP] buttons ( and ) .
B
OUTDOOR TEMP.
<Target temperature in COOLING mode>
WATER TEMP
COOLING
Set target flow water temperature in COOLING mode with [TEMP] buttons ( and ) .
74
<Temperature OFFSET setting>
This setting is to adjust the difference between the actual fl ow water temperature at the refrigerant-water heat exchanger outlet
and the temperature sensed by TH1 which tends to be lower due to heat leakage from water piping.
HEATING mode
T(a)=ActualFlowwater
temp.(outlet side)
Outdoor unit
ӠT(h)
=T(a)-T(s)
FTC
TH1
T(s)=sensed flow water
temp.
FTC
TH1
T(s)=sensed flow water
temp.
Ӡ
Ӡ
*1 Refrigerant-water HEX
COOLING mode
T(a)=ActualFlowwater
temp.(outlet side)
Outdoor unit
TEMP OFFSET
HEATING
TEMP OFFSET
COOLING
*1
Water piping
ӠT(c)
=T(s)-T(a)
*1
Water piping
Set OFFSET temperature T(h) in HEATING mode with [TEMP] buttons ( and ) .
Set OFFSET temperature T(c) in COOLING mode with [TEMP] buttons ( and ) .
In order to let the PCB memorize the changed parameters
Make sure to press thebutton before quitting the INITIAL SETTING mode.
If you press thebutton in INITIAL SETTING mode before pressing thebutton ,
ON/OFF
CIR.WATER
CIR.WATER
you can exit from this mode without any change.
75
6. Defi nition of analog signal by remote controller
(Required only for ANALOG TEMP. system)
Set following 2 parameters to assign the target temperature value to analog signal figures.
(1) Pressbutton for 3 seconds to activate this setting mode.
(2) [DISPLA
Pressbutton to switch to the next parameter setting.
Set flow temp. for No.1 and No.2 with
Set flow temp. for No.1 and No.2 with [TEMP] buttons ( and ) .
Pressbutton to switch alternately. (The blinking figure can be changed.)
In order to let FTC memorize set parameters
ON/OFF
CIR.WATER
CIR.WATER
Make sure to pressbutton before exit from ANALOG SIGNAL ADJUST mode.
If you pressbutton before pressingbutton in ADJUST mode, you can exit from this mode without
making any change.
ANALOG
SIGNAL
TEMP.
˚C
˚C
ON/OFF
76
7. Troubleshooting
A fl owing water sound or occasional hissing sound is
heard.
Water does not heat or cool well.
Water or vapor is emitted from the outdoor unit.
The operation indicator does not appear in the remote controller display.
” appears in the remote controller display.
“
When restarting the outdoor unit soon after stopping it, it does
not operate even though the ON/OFF button is pressed.
FTC operates without the ON/OFF button being pressed.
FTC stops without the ON/OFF button being pressed.
Remote controller timer operation cannot be set.
“PLEASE WAIT” appears in the remote controller display.
An error code appears in the remote controller display.
■
Thease sounds can be heard when refrigerant is flowing in the
indoor unit, refrigerant pipe or when the refrigerant is chaging.
■
Clean the fi lter of water piping. (Flow is reduced when the fi lter is dirty or
clogged.)
■
Check the temperature adjustment and adjust the set temperature.
■
Make sure that there is plenty of space around the outdoor unit.
■
During cooling mode, water may form and drip from the cool pipes and
joints.
■
During heating mode, water may form and drip from the heat exchanger
of outdoor unit.
■
During defrosting mode, water on the heat exchanger of outdoor unit
evaporates and water vapor may be emitted.
■
Turn on the power switch. “
■
During external signal control, “” appears in the remote controller dis-
play and FTC operation cannot be started or stopped using the remote
controller.
■
Wait approximately 3 minutes. (Operation has stopped to protect the out-
door unit.)
■
Is the on timer set?
Press the ON/OFF button to stop operation.
■
Is the FTC connected to a external signal?
Consult the concerned people who control the FTC.
■
Does “
Consult the concerned people who control the FTC.
■
Has the auto recovery feature from power failures been set?
Press the ON/OFF button to stop operation.
■
Is the off timer set?
Press the ON/OFF button to restart operation.
■
Is the air conditioner connected to a central remote controller?
Consult the concerned people who control the FTC.
■
Does “
Consult the concerned people who control the FTC.
■
Are timer settings invalid?
If the timer can be set,
remote controller display.
■
The initial settings are being performed. Wait approximately 3 minutes.
■
If the remote controller is not only for FTC, change it.
■
The protection devices have operated to protect the FTC and outdoor unit.
■
Do not attempt to repair this equipment by yourself.
Turn off the power switch immediately and consult your dealer. Be sure to
provide the dealer with the model name and information that appeared in
the remote controller display.
” appear in the remote controller display?
” appear in the remote controller display?
” will appear in the remote controller display.
WEEKLY
,
SIMPLE
, or
AUTO OFF
appears in the
If the unit cannot be operated properly after test run, refer to the following table to find the cause.
•
Wired remote controllerLED 1, 2 (PCB in outdoor unit)
PLEASE WAIT
PLEASE WAIT Error code
Display messages do not
appear even when operation
switch is turned ON (operation
lamp does not light up).
Symptom
For about 2
minutes after
power-on
Subsequent to
about 2 minutes
after power-on
After LED 1, 2 are lighted, LED 2 is
turned off, then only LED 1 is
lighted.
(Correct operation)
Only LED 1 is lighted.
Only LED 1 is lighted.
LED 1, 2 blink.
LED 1 blinks twice,
LED 2 blinks once.
•
For about 2 minutes following power-on,operatio n of the remote controller is not possible
due to system start-up. (Correct operation)
•Connector for the outdoor unit’s protection
device is not connected.
•Reverse or open phase wiring for the outdoor
unit’s power terminal block (L1, L2, L3)
•Incorrect wiring betwe e n F T C and outdoor
(incorrect polarity of S1, S2, S3)
•Remote controller wire short
Cause
Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED1, 2, 3) provided on the FTC, refer to the following table.
LED1 (power for microcomputer)Indicates whether control power is supplied. Make sure that this LED is
LED2 (power for remote controller)Indicates whether power is supplied to the remote controller.
LED3 (communication between FTC and outdoor units)Indicates state of communication between the FTC and outdoor
always lit.
This LED lights only in the case of the FTC which is connected
to the outdoor unit refrigerant addresses “0”.
units.
Make sure that this LED is always blinking.
77
Error code indication
You can check an error code on both 1 and 2.
LCD display on remote controller
1
2-digit LED indicator on outdoor unit PCB
2
(For SPLIT type outdoor unit, this LED indicator is optional parts.PAC-SK52ST)
[1]
SELF-DIAGNOSIS ACTION TABLE
Error CodeAbnormal point and detection method CauseCountermeasure
P1
Actual fl ow water temperature thermis-
tor (TH1)
The unit is in 3-minute resume
1
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3 minutes. (The unit returns to normal operation, if it has been reset normally.)
Constantly detected during cooling,
2
drying, and heating operation.
Short: -90: or more
Open: -40: or less
1
characteristics
2
3
failure of thermistor wiring
4
* The 2-digit LED indicator on outdoor unit PCB can display indoor side error as well.
Defective thermistor
Contact failure of TB61 No.1-2
on PCB of FTC
Breaking of wire or contact
Defective PCB of FTC
Check resistance value of thermistor.
1–3
0: 15.0k
10: 9.6k
20: 6.3k
30: 4.3k
40: 3.0k
If you put force on (draw or bend) the lead wire
with measuring resistance value of thermistor, breaking of wire or contact failure can be
detected.
Check contact failure of TB61 No.1-2 on
2
PCB of FTC. Refer to 8.
Turn the power on again and check restart
after inserting connector again.
Check actual fl ow water temperature display
4
on remote controller.
Replace PCB of FTC if there is abnormal dif-
ference with actual fl ow water temperature.
Turn the power off, and on again to operate
after check.
"
"
"
"
"
P2
P6
Pipe temperature thermistor/Liquid
(TH2)
The unit is in 3-minute resume
1
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3 minutes. (The unit returns to normal operation, if it has been reset normally.)
Constantly detected during cooling,
2
drying, and heating (except defrosting)
operation
Short: 90: or more
Open: -40: or less
Freezing/overheating protection is working
Freezing protection (Cooling mode)
1
The unit is in 6-minute resume preven-
tion mode if pipe temperature stays
under -15: for 3 minutes, 3 minutes
after the compressor started. Abnormal if
it stays under -15: for 3 minutes again
within 16 minutes after 6-minute resume
prevention mode.
Overheating protection (Heating mode)
2
The units is in 6 minute resume
prevention mode if pipe temperature is
detected as over 70: after the compres-
sor started. Abnormal if the temperature
of over 70: is detected again within 30
minutes after 6 minute resume preven-
tion mode.
Defective thermistor
1
characteristics
Contact failure of TB61 No.3-4
2
on PCB of FTC
Breaking of wire or contact
3
failure of thermistor wiring
Defective refrigerant circuit is
4
causing thermistor temperature
:
or more or -40: or
of 90
less.
Defective PCB of FTC
5
(Cooling mode)
Short cycle of air path
1
Low-load (low temperature)
2
operation out of the tolerance
range
Defective outdoor fan control
3
Overcharge of refrigerant
4
Defective refrigerant circuit
5
(clogs)
(Heating mode)
Short cycle of air path
1
Over-load (high temperature)
2
operation out of the tolerance
range
Defective outdoor fan control
3
Overcharge of refrigerant
4
Defective refrigerant circuit
5
(clogs)
Bypass circuit of outdoor unit is
6
defective.
Check resistance value of thermistor.
1–3
For characteristics, refer to (P1) above.
Check contact failure of TB61 No.3-4 on
2
PCB of FTC. Refer to 8.
Turn the power on and check restart after
inserting connector again.
Check pipe <liquid> temperature with remote
4
controller in test run mode. If pipe <liquid>
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.
Check pipe <liquid> temperature with remote
5
controller in test run mode. If there is extremely difference with actual pipe <liquid>
temperature, replace PCB of FTC.
Turn the power off, and on again to operate
after check.
(Cooling mode)
Remove shields.
1
Check outdoor fan motor.
3
Check operating condition of refrigerant
45
circuit.
(Heating mode)
Remove shields.
1
Check outdoor fan motor.
3
Check operating condition of refrigerant
4~6
circuit.
78
Error CodeAbnormal point and detection method CauseCountermeasure
troller cannot receive any transmission
normally from FTC of refrigerant address
“0” for 3 minutes.
(Error code: E0)
Abnormal if sub-remote controller could
2
not receive any signal for 2 minutes. (Error code: E0)
Abnormal if FTC can not receive any
1
data normally from remote controller
board or from other Interface/Flow temp.
controller board for 3 minutes. (Error
code: E4)
FTC cannot receive any signal from
2
remote controller for 2 minutes. (Error
code: E4)
Contact failure at transmission
1
wire of remote controller
All remote controllers are set
2
as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at LED (LED1, LED2)
on the outdoor controller circuit
board.
Miswiring of remote controller
3
Defective transmitting receiving
4
circuit of remote controller
Noise has entered into the
5
transmission wire of remote
controller.
Check disconnection or looseness of FTC or
1
transmission wire of remote controller.
Set one of the remote controllers “main”, If
2
there is no problem with the action above.
Check wiring of remote controller.
3
• Total wiring length: max. 500 m
(Do not use cablex 3 or more.)
• The number of connecting remote controller: max. 2 units
When it is not the above-mentioned problem of
1~3
Diagnose remote controllers.
4
a) When “RC OK” is displayed, remote con-
trollers have no problem.
Turn the power off, and on again to check.
If abnormality generates again, replace
PCB of FTC.
b) When “RC NG” is displayed, replace
remote controller.
c) When “RC E3” or “ERC 00-66” is dis-
played, noise may be causing abnormality.
E1
or
E2
E3
or
E5
Remote controller control board
Abnormal if data cannot be read nor-
1
mally from the nonvolatile memory of the
remote controller control board.
fi nd blank of transmission path for 6
seconds and could not transmit.
(Error code: E3)
When remote controller receives the
2
transmitted data same time and compares these data. Abnormal if the data is
judged to be different for 30 continuous
times. (Error code: E3)
Abnormal if FTC could not fi nd blank of
1
transmission path. (Error code: E5)
When FTC receives the transmitted data
2
same time and compares these data. Abnormal if the data is judged to be different for 30 continuous times. (Error code:
E5)
Defective remote controller
1
2 remote controllers are set as
1
“main.”
(
In case of 2 remote controllers
Defective transmitting receiving
2
circuit of remote controller
Defective transmitting receiving
3
circuit of FTC
Noise has entered into trans-
4
mission wire of remote controller.
Replace remote controller.
1
Set a remote controller to main, and the
1
other to sub.
)
Diagnose remote controller.
2~4
a) When “RC OK” is displayed, remote con-
trollers have no problem.
Turn the power off, and on again to check.
When becoming abnormal again, replace
indoor controller board.
b) When “RC NG” is displayed, replace
remote controller.
c) When “RC E3” or “ERC 00-66” is dis-
played, noise may be causing abnormal-
ity.
E6
FTC/outdoor unit communication error
(Signal receiving error)
Abnormal if FTC cannot receive any
1
signal normally for 6 minutes after turning
the power on.
Abnormal if FTC cannot receive any
2
signal normally for 3 minutes.
Contact failure, short circuit or,
1
miswiring (converse wiring) of
FTC/outdoor unit connecting
wire
Defective transmitting receiving
2
circuit of FTC
Defective transmitting receiving
3
circuit of FTC
Noise has entered into FTC/
4
outdoor unit connecting wire.
79
* Check LED display on the outdoor control
circuit board. (Connect A-control service tool,
PAC-SK52ST.)
Check disconnection or looseness of FTC/
1
outdoor unit connecting wire of FTC or outdoor unit.
Turn the power off, and on again to
2~4
check. If abnormality generates again,
replace FTC or outdoor controller circuit
board.
Error CodeAbnormal point and detection method Judgment and actionCase
E8
FTC/outdoor unit communication error
(Signal receiving error)
(Outdoor unit)
(1) Abnormal if outdoor controller circuit
board could not receive anything
normally for 3 minutes.
Contact failure of FTC/outdoor
1
unit connecting wire
Defective communication circuit
2
of outdoor controller circuit
board
Defective communication circuit
3
of FTC
Noise has entered into FTC/
4
outdoor unit connecting wire.
Check disconnection or looseness of FTC/
1
outdoor unit connecting wire of FTC or outdoor unit.
Turn the power off, and on again to
2~4
check. Replace PCB of FTC or outdoor
controller circuit board if abnormality is
displayed again.
E9
EF
Ed
FTC/outdoor unit communication error
(Transmitting error) (Outdoor unit)
(1) Abnormal if “0” receiving is detected
30 times continuously though outdoor
controller circuit board has transmitted
“1”.
(2) Abnormal if outdoor controller circuit
board could not fi nd blank of transmis-
sion path for 3 minutes.
Non defi ned error code
This code is displayed when non defi ned
error code is received.
Serial communication error
Abnormal if serial communication between
outdoor controller circuit board and outdoor
power circuit board is defective.
FTC/outdoor unit connecting
1
wire has contact failure.
Defective communication circuit
2
of outdoor controller circuit
board
Noise has entered power sup-
3
ply.
Noise has entered FTC/outdoor
4
unit connecting wire.
Noise has entered transmission
1
wire of remote controller.
Noise has entered Interface
2
unit/Flow temp. controlleroutdoor unit connecting wire.
Wire disconnection or contact
1
failure of connector CN2 be-
tween the outdoor controller
circuit board and the outdoor
power circuit board
Wire disconnection or contact
2
failure of connector CN4 be-
tween the outdoor controller
circuit board and the outdoor
power circuit board
Defective communication circuit
3
of outdoor power circuit board
Defective communication circuit
4
of outdoor controller circuit
board for outdoor power circuit
board
Check disconnection or looseness of FTC/
1
outdoor unit connecting wire.
Turn the power off, and on again to
2~4
check. Replace outdoor controller circuit
board if abnormality is displayed again.
Turn the power off, and on again to check.
12
Replace Interface/Flow temp. controller
board or outdoor controller circuit board if
abnormality is displayed again.
Check connection of each connector CN2
12
and CN4 between the outdoor controller
circuit board and the outdoor power circuit
board.
Replace outdoor power circuit board.
3
Replace outdoor controller circuit board.
4
80
[2]
HOW TO "MONITOR THE OPERATION DATA"
• Turn on the [Monitoring the operation data]
(3)
Example) Request code "004"
Discharge temperature 69
Refrigerant address "00"
(7)
(5)
(1)
(4)
(1)Press the
(2)Press the
Note)
Operating the service inspection monitor
- - - ] appears on the screen (at
[
(The display (at
(3)Press the [TEMP] buttons (
[Screen]
(4)Press the [CLOCK] buttons ( and ) to set the desired request code No.
(5)Press the button to perform data request.
(The requested data will be displayed at
Data collected during operation of the remote controller will be displayed.
The collected data such as temperature data will not be updated automatically even if the data changes.
To display the updated data, carry out step (4) again.
TEST
CHECK
It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while "
since no buttons are operative.
PAR-W21MAA
button for 3 seconds so that [ Maintenance mode] appears on the screen (at ).
button for 3 seconds to switch to [Maintenance monitor].
) when [Maintenance monitor] is activated.
) now allows you to set a request code No.)
and ) to select the desired refrigerant address.
in the same way as in maintenance mode.)
(2)(6)
A: Maintenance mode
B: Refrigerant address
C: Data display area
D: Request code display area
- - - -"
is blinking)
Canceling the Monitoring the operation data
(6)While [Maintenance monitor] is displayed, press the
(7)To return to normal mode, press the
ON/OFF
CHECK
button.
81
button for 3 seconds to return to maintenance mode.
[3]
Request code list
* Certain FTC/outdoor combinations do not have the request code function; therefore, no request codes are displayed.
Request content
Request code
Operation state
0
Compressor-Operating current (rms)
1
Compressor-Accumulated operating time
2
Compressor-Number of operation times
3
Discharge temperature (TH4)
4
Outdoor unit - Liquid pipe 1 temperature (TH3)
5
Outdoor unit - Liquid pipe 2 temperature
6
Outdoor unit-2-phase pipe temperature (TH6)
7
8
Outdoor unit-Suction pipe temperature (TH32)
Outdoor unit-Outside air temperature (TH7)
9
Outdoor unit-Heatsink temperature (TH8)
10
11
Discharge superheat (SHd)
12
Sub-cool (SC)
13
14
15
Compressor-Operating frequency
16
Compressor-Target operating frequency
17
Outdoor unit-Fan output step
18
Outdoor unit-Fan 1 speed
19
(Only for air conditioners with DC fan motor)
Outdoor unit-Fan 2 speed
Refer to Detail Contents in Request Code.
0 – 50
0 – 9999
0 – 9999
3 – 217
-40 – 90
-40 – 90
-39 – 88
-39 – 88
-39 – 88
-40 – 200
0 – 255
0 – 130
0– 255
0– 255
0– 10
0 – 9999
0 – 9999
0– 500
0– 500
0– 500
0– 50
180 – 370
0– 4
0 – 999
0 – 120
UnitRemarks
–
A
10 hours
100 times
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
˚C
Hz
Hz
Step
rpm
rpm
Pulses
Pulses
Pulses
Units
Minutes
Minutes
"0" is displayed if the air conditioner is a single-fan
type.
A
V
Not possible to activate maintenance mode during the test run.
82
Request content
Request code
FTC unit-Control state
50
Outdoor unit-Control state
51
Compressor-Frequency control state
52
Outdoor unit-Fan control state
53
Actuator output state
54
Error content (U9)
55
56
57
58
59
Signal transmission demand capacity
60
Contact demand capacity
61
External input state (silent mode, etc.)
62
63
64
65
66
67
68
69
Outdoor unit-Capacity setting display
70
Outdoor unit-Setting information
71
72
Outdoor unit-SW1 setting information
73
Outdoor unit-SW2 setting information
74
75
Outdoor unit-SW4 setting information
76
Outdoor unit-SW5 setting information
77
Outdoor unit-SW6 setting information
78
Outdoor unit-SW7 setting information
79
Outdoor unit-SW8 setting information
80
Outdoor unit-SW9 setting information
81
Outdoor unit-SW10 setting information
82
83
M-NET adapter connection (presence/absence)
84
85
86
87
88
89
Display of execution of replace/wash operation
Outdoor unit-Microcomputer version information
90
Outdoor unit-Microcomputer version information (sub No.)
91
92
93
94
95
96
97
98
99
Outdoor unit - Error postponement history 1 (latest)
100
Outdoor unit - Error postponement history 2 (previous)
101
Outdoor unit - Error postponement history 3 (last but one)
102
Description
(Display range)
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
0 – 255
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
Refer to Detail Contents in Request Code.
"0000": Not connected
"0001": Connected
"0000": Not washed
"0001": Washed
Examples) Ver 5.01
"0501"
Auxiliary information (displayed after
version information)
Examples) Ver 5.01 A000
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
"A000"
Code
Code
Code
UnitRemarks
–
–
–
–
–
–
%
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Ver
–
83
Request content
Request code
Error history 1 (latest)
103
Error history 2 (second to last)
104
Error history 3 (third to last)
105
Abnormal thermistor display
106
(TH3/TH6/TH7/TH8)
Operation mode at time of error
107
Compressor-Operating current at time of error
108
Compressor-Accumulated operating time at time of error
109
Compressor-Number of operation times at time of error
110
Discharge temperature at time of error
111
Outdoor unit - Liquid pipe 1 temperature (TH3) at time of error
112
Outdoor unit - Liquid pipe 2 temperature at time of error
113
Outdoor unit-2-phase pipe temperature (TH6) at time of error
114
115
Outdoor unit-Outside air temperature (TH7) at time of error
116
Outdoor unit-Heatsink temperature (TH8) at time of error
117
Discharge superheat (SHd) at time of error
118
Sub-cool (SC) at time of error
119
Compressor-Operating frequency at time of error
120
Outdoor unit at time of error
121
• Fan output step
Outdoor unit at time of error
122
• Fan 1 speed (Only for air conditioners with DC fan)
Outdoor unit at time of error
123
• Fan 2 speed (Only for air conditioners with DC fan)
124
LEV (A) opening at time of error
125
LEV (B) opening at time of error
126
127
128
129
Thermostat ON time until operation stops due to error
130
131
132
FTC-Liquid pipe temperature at time of error
133
FTC at time of error
134
•
Actual flow water temperature <Thermostat judge temperature>
135
136
137
138
139
140
~
146
147
148
149
FTC-Actual flow water temperature
150
FTC-Liquid pipe temperature
151
152
~
767
Description
(Display range)
Displays error history. (" - - " is displayed if no history is present.)
Displays error history. (" - - " is displayed if no history is present.)
Displays error history. (" - - " is displayed if no history is present.)
0Normal
1Preparing for heat operation
2–
3–
4Heater is ON.
5Anti-freeze protection is ON.
6Overheat protection is ON.
7Requesting compressor to turn OFF
FThere are no corresponding units.
Power currently
supplied to compressor
–
ON
ON
Compressor4-way valveSolenoid valve
–
ON
ON
ON
ON
–
ON
ON
ON
ON
ON
–
ON
ON
ON
ON
[Outdoor unit – Control state] (Request code ":51")
Data displayState
0000Normal
0001Preparing for heat operation
0002Defrost
[Compressor – Frequency control state] (Request code ":52")
Data display
00
Frequency control state
Frequency control state
Frequency control state
DisplayCurrent limit control
0No current limit
1Primary current limit control is ON.
2Secondary current limit control is ON.
Fan step correction value by heatsink temperature overheat prevention control
Fan step correction value by cool condensation temperature overheat prevention control
DisplayCorrection value
- (minus)– 1
00
1
2
+1
+2
[Actuator output state] (Request code :"54")
Data display
00
Actuator output state
Actuator output state
Actuator output state
DisplaySV14-way valveCompressor
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
Compressor is
warming up
ON
ON
ON
ON
ON
ON
ON
ON
Actuator output state
Display52CSV2SS
0
1
2
3
4
5
6
7
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
[Error content (U9)] (Request code :"55")
Data display
00
Error content
Error content
Error content : Detected
Display
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
OvervoltageUndervoltageL1-phase
errorerroropen error
Power synchronizing
signal error
Error content : Detected
0
1
2
3
Converter Fo
error
PAM error
Display
86
[Contact demand capacity] (Request code "61")
Data display
000
Setting content
[External input state] (Request code "62")
Data display
000
Input state
Setting content
ON
ON
Setting
ON
DisplaySetting value
0
150%
275%ON
3100%
Input state : Input present
Display
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
0%
Contact demandSilent modeSpare 1Spare 2
inputinputinputinput
SW7-1SW7-2
[Outdoor unit - Capacity setting display] (Request code : "70")
Data display
935
1050
1160
1471
20100
25125
28140
40200
50250
Capacity
[Outdoor unit - Setting information] (Request code "71")
Data display
00
Setting information
Setting information
Setting information
DisplayDefrost mode
0Standard
1For high humidity
Setting information
Display
0
1
2
3
Single-/Heat pump/
3-phase
Single-phase
3-phase
cooling only
Heat pump
Cooling only
Heat pump
Cooling only
87
[Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82