Mitsubishi PUHZ-W85VHA2.UK, PUHZ-W85VHA2-BS.UK Service Manual
AIR TO WATER HEAT PUMP
SERVICE MANUAL
R410A
[Model name]
PUHZ-W85VHA2
[Service Ref.]
PUHZ-W85VHA2.UK
August 2009
No. OCH465
Note:
• This manual describes only
service data of outdoor unit.
• RoHS compliant products have
<G> mark on the spec name plate.
PUHZ-W85VHA2-BS
PUHZ-W85VHA2-BS.UK
CONTENTS
1. SAFETY PRECAUTION
2. SPECIFICATIONS
3. DATA
4. OUTLINES AND DIMENSIONS
5. WIRING DIAGRAM
6. WIRING SPECIFICATIONS
7. REFRIGERANT SYSTEM DIAGRAM
8. TROUBLESHOOTING
9. DISASSEMBLY PROCEDURE
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2
5
7
9
10
11
12
13
42
PUHZ-W85VHA2.UK
PUHZ-W85VHA2-BS.UK
PARTS CATALOG (OCB465)
1
SAFETY PRECAUTION
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
1-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check valve.
Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Tools for R410A
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Vacuum pump adaptor
Electronic refrigerant
charging scale
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction
of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Charge refrigerant from liquid phase of gas cylinder.
If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency
will be lowered.
2
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Unit
Gravimeter
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
Gauge manifold · Only for R410A
1
· Use the existing fitting
· Use high-tension side pressure of 5.3 MPa·G or over.
Charge hose · Only for R410A
2
· Use pressure performance of 5.09 MPa·G or over.
Electronic scale
3
Gas leak detector · Use the detector for R134a, R407C or R410A.
4
Adaptor for reverse flow check · Attach on vacuum pump.
5
Refrigerant charge base
6
Refrigerant cylinder · Only for R410A Top of cylinder (Pink)
7
Refrigerant recovery equipment
8
specifications
—
—
Cylinder with syphon
—
. (UNF1/2)
3
1-3. CAUTIONS FOR REFRIGERANT PIPING WORK
Tools for R410A (The following table shows whether conventional tools can be used or not.)
Tools and materials Use R410A tools Can R22 tools be used?
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Safety charger
Charge valve
Vacuum pump
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermistor vacuum gauge and
vacuum valve
Charging cylinder
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Bend the pipes
Cut the pipes
Weld the pipes
Charge refrigerant
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refrigerant to thermistor vacuum gauge)
Refrigerant charge
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adapter for reverse flow check
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
(Usable if equipped
with adapter for rever se flow)
Can R407C tools be used?
(Usable if equipped
with adapter for rever se flow)
1-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the
performance of the unit.
1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by
rainwater. (If a sunshade is installed, rainwater may not clean the panel.)
3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water
collecting in the base of the outdoor unit could cause rust.
4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
5. If the unit is damaged during installation or maintenance, be sure to repair it.
6. Be sure to check the condition of the unit regularly.
7. Be sure to install the unit in a location with good drainage.
4
2
SPECIFICATIONS
2-1. SPECIFICATIONS
PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
1㱢, 230V, 50Hz
Nominal water flow rate (Heating mode) L/min
Heating
icapaC 㷄
(Min.2.70 䌾) 9.00
(A7/W35)
(Min.2.60 䌾) 8.50
Heating
capaC
Wkyti
(A2/W35)
Pressure difference (water circuit) 䇭 )teltuo/t
Heating pump input (based on EN14511) kW
Cooling
(COP) Water temperature (inlet/outlet) +12/+7㷄
(A35/W7)
EER
Power input kW
Cooling
(COP) Outside air temperature (Wet-bulb) + 24㷄
(A35/W18)
EER
Pressure difference (water circuit) 䇭kPa
Cooling pump input (based on EN14511) kW
Note: "Capacity", "COP" and "Power input" in the above table are values that contains the "pump input (based on EN 14511) ".
Model name
Running current Heating
Cooling
Power factor Heating
Cooling
(A7/W35) 05-03HCAA
(A35/W7) A
(A7/W35) mm4.04:A%
(A35/W7) mm2.862:B%
PUHZ-W85VHA2(-BS)
Atnerruc.xaM
eR
Linear expansion valve
Compressor
Model
Motor output kW
Start type
Protection devices
Oil (Model) L
WretaehesacknarC
Heat exchanger Air
Water
Plate heat exchanger
Fan Fan(drive)×No.
Fan motor output
Air flow
kW
3
/min
m
(CFM)
Defrost method
Noise level Heating dB
(SPL)
Cooling dB
Dimensions Width mm (in.)
Depth mm (in.)
330 +30
Height mm (in.)
)sbl(gkthgieW
Refrigerant
Quantity kg (lbs)
Guaranteed operating Heating
range (Outdoor) Cooling
Outlet water temp. Heating
(Max in heating, Min in cooling)
Nominal return water
Cooling
Heating
temperature range Cooling
㷄
㷄
㷄
㷄
㷄
㷄
nim/LegnaretarwolfretaW
25.8
4.18
2.15
3.17
2.68
13.5
0.02
21.5
7.50
2.47
3.04
7.50
3.93
1.91
10
0.012
9.38
13.15
98
98
23.0
25
Galvanized plate
Munsell 3Y 7.8/1.1
Hermetic twin rotary
TNB220FLHM1T
1.3
Inverter
HP switch
Discharge thermo
Shell thermo
0.67 (FV50S)
-
Plate fin coil
Propeller fan × 1
0.060
49
(1,730)
Reverse cycle
48
48
*1
*2
*2
950 (37-3/8)
*3
(13+1-3/16)
943 (37-1/8)
79 (174)
R410A
2.4 (5.3)
䌾 +35
-20
*4
䌾 +46
-5
+60
+5
+5 䌾 +59
+8 䌾 +28
10.0 䌾 25.8
*5
Heating(A7/W35)
Heating(A2/W35)
Cooling(A35/W7)
Cooling(A35/W18)
Note: We confirm that our units are tested based on EN14511.
regnahcxetaehetalPsnoitacificepstinuroodtuO
ALFA LAVAL
Ref. IN
(Heating)
mm39:WAezisrekaerB
mm523:HgnisacretuO
mm84:DhsiniflanretxE
Ref. OUT
(Heating)
setalp05lortnoctnaregirf
Maximum outlet water temperature
65
]
㷄
60
55
50
45
Maximum outlet watertemperature [
40
-20 -15 -10 -5 0 5 10
*1 Hot gas with 4-way valve
*2 at distance of 1m from outdoor unit
*3 grill
*4 With the optional air outlet guide, the operation at
-15°C outdoor temperature is possible.
*5 For details of the min. return water temperature at
each water flow rate, refer to the chapter 2-2.
Ambient temperature [㷄]
noitidnocgnitarepolanimoN)ycneuqerF,egatloV,esahP(ylppusrewoP
7+)blub-yrD(erutarepmetriaedistuOWkyt
6+)blub-teW(erutarepmetriaedistuOPOC 㷄
53+/03+)teltuo/telni(erutarepmetretaWWktupnirewoP 㷄
2+)blub-yrD(erutarepmetriaedistuOPOC 㷄
1+)blub-teW(erutarepmetriaedistuOWktupnirewoP 㷄
elni(erutarepmetretaWaPk 䋭/+35㷄
㷄
53+)blub-yrD(erutarepmetriaedistuOnim/L)edomgnilooC(etarwolfretawlanimoN
42+)blub-teW(erutarepmetriaedistuOWkyticapaC 㷄
53+)blub-yrD(erutarepmetriaedistuOWkyticapaC 㷄
81+/32+)teltuo/telni(erutarepmetretaWWktupnirewoP 㷄
W
Water OUT
B
H
Water IN
D
Thermistor
(TH32)
A
5
2-2. AVAILABLE RANGE (WATER FLOW RATE, RETURN WATER TEMP.)
Note: If the value of water flow rate and return water temp. become lower than the available range, it
could cause damage to the parts of unit.
<Heating>
<Applicable Models>
19.0
17.0
15.0
13.0
11.0
9.0
Return water temp []
7.0
5.0
10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
Water flow rate [L/min]
Table 1
Available range
•PUHZ-W85VHA2(-BS)
<Cooling>
Return water temp []
15.0
14.0
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
12.010.0 14.0 16.0
Water flow rate [L/min]
18.0
Table 2
Available range
20.0
22.0 24.0
<Applicable Models>
•PUHZ-W85VHA2(-BS)
6
3
DATA
3-1. NOISE CRITERION CURVES
MICROPHONE
1m
1.5m
PUHZ-W85VHA2(-BS).UK
90
MODE
COOLING
HEATING
UNIT
GROUND
SPL(dB)
48
48
LINE
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
7
3-2. STANDARD OPERATION DATA
Mode
Capacity W 7,500 9,000
Total
Input kW 3.04 2.15
Outdoor unit PUHZ-W85VHA2
Phase, Hz 1, 50
Voltage V 230
Electrical circuit
Current A 13.15 9.38
Discharge pressure MPa 2.81 2.16
Suction pressure MPa 0.73 0.64
Discharge temperature ºC 80 65
Cooling
(A35/W7)
Heating
(A7/W35)
Condensing temperature
Refrigerant circuit
Suction temperature ºC 3 -1
Flow volume L/min 21.5 25.8
Water
Outlet water temperature
conditions
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/cm²)
We confirm that our units are tested based on EN 14511.
W.B. ºC 24 6
ºC 46 37
ºC 7 35
D.B. ºC 35 7
8
4
OUTLINES AND DIMENSIONS
PUHZ-W85VHA2(-BS).UK
Unit: mm
ISO 228/1-G1 B
24
2-U Shaped notched holes
(Foundation Bolt M10)
Rear Air Intake
19
Installation Feet
417
37028
53
2-12 x 36 oval holes
(Foundation Bolt M10)
Air Discharge
950
Earth terminal
98 269
Detail
Handle for moving
Terminal Connections
Left...Power supply wiring
Right...Controller wiring
Power supply wiring hole
(2-:27 knockout)
Service panel
673
See Detail
34
40119
Side Panel R
Front cover
Drain hole
(5-:33)
175 175600
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts and washers must be
purchased locally.)
Over300
2 SERVICE SPACE 3 FOUNDATION BOLTS
Dimensions of space needed
for service access are
shown in the below diagram.
33030
Side Air Intake
FOUNDATION
<Foundation bolt height>
30
Less than
500
Over
Over10
500
Over
Service space
322
Handle for moving
Side Air Intake
Rear Air Intake
943
Handle for moving
473
Handle for moving
220 145145145
23
219
57
30
81
Over 300mm
FREE
1 FREE SPACE (Around the unit)
The diagram below shows a
basic example.
Explanation of particular details are
given in the installation manuals etc.
Over 10mm
Over 10mm
Over 500mm
9
Water OUT
Handle for moving
Air Intake
Water IN
5 WIRING DIAGRAM
PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
SYMBOL NAME SYMBOL NAME
TB1
MC
MF1
21S4
SV Solenoid Valve <Bypass Valve>
63H
63HS
TH3
TH4
TH6
TH7
TH8
TH32 Thermistor <Inlet water>
TH33 Thermistor <Comp Surface>
LEV-A, LEV-B
DCL
ACTM
CY1,CY2
P. B.
TABU/V/W
TABS/T
MF1
MS
3
Terminal Block <
Flow temp. controller>
Motor for Compressor
Fan Motor
Solenoid Valve <Four-Way Valve>
High Pressure Switch
High Pressure Sensor
Thermistor <Liquid>
Thermistor <Discharge>
Thermistor <Plate HEX Iiquid>
Thermistor <Ambient>
Thermistor <Heat sink>
Electronic Expansion Valve
Reactor
Active Filter Module
Capacitor
Power Circuit Board
Connection Terminal
Connection Terminal <L/N-Phase>
C. B.
1
7
CNF1
(WHT)
3
2
1
CNDC
(PNK)
CNS
(WHT)
1
3
Power Supply,Interface unit /
<
TH32
TH33
TH7
t°
t°
12
12
TH32
TH33
(BLK)
(YLW)
TRANS
F2
CNAC
(WHT)
2
1
F1
3
4
U/V/W-Phase>
TH6 TH3 TH4
t° t° t° t°
TH7/6
TH3
(RED)
TH4
(WHT)
(WHT)
1
3
63H
(YLW)
CN2
(WHT)
17
F3
F4
TAB P1/ P2
TABN1/N2
DS2, DS3
IPM
N.F.
LI,LO
NI,NO
EI,E2
52C
C.B.
SW1
SW2
SW5
SW6
SW7
SW8
SW10
SV1
CNDM
LED3
F1 F4
X52,X54, X55
63HS
63H
2
7
21S4
(GRN)
11121
63HS
(WHT)
21S4 SV
LEV-A
M
34
LEV-A
(WHT)
CN4
(WHT)
12
2
X52
1313
(BLU)
<
Connection Terminal
Connection Terminal <DC Voltage>
Diode bridge
Power Module
DC Voltage>
Noise Filter Circuit Board
Connection Terminal
Connection Terminal <N-Phase>
Connection Terminal
52C Relay
<
L-Phase>
<
Ground>
Controller Circuit Board
Switch <Function Switch>
Switch
<
Function Switch>
Switch
<
Function Switch>
Switch <Model Select>
Switch <Function Switch>
<
Function Switch>
Switch
<
Model Select>
Switch
<
Connector
Connector <Connection
Connection for Option>
for Option(Contact Input)
LED <Operation/Inspection Indicators>
<
T6.3AL250V>
Fuse
Relay
1 MODEL SELECT
SW6
13
X54
SV1
(GRY)
1
CNMNT
CN52C
(RED)
12
2
12345 6
00101 1
1=ON, 0=OFF
5
SW5
(WHT)
SW8
LED3
1
SW6
SW1
CN3S
(WHT)
CNDM
(WHT)
(WHT)
CN51
LEV-B
M
1613
61
LEV-B
CNVMNT
(RED)
(WHT)
X55
SV2
SW7
SW2
SW10
>
SW10
12
01
1
1
3
1
3
1
5
N. F.
BLU
WHT
NO
LO
52C
P. B .
4
1
CNAF
(WHT)
6
7
1
CN2
IPM
(WHT)
7
1
CN3
(WHT)
2
1
CN5
(RED)
2
1
CN4
(WHT)
2
TABN
TABP
TABP2
RED
TAB U
RED
U
RED
BLK
TH8
t°
2
2
V
DCL
MS
3
TAB V
WHT
BLK
W
WHT
CNDC
(PNK)
MC
L1
TAB W
2
1
L2
ACTM
3
4
WHT
16
TAB T
WHT
TABS
TABP1
BLU
WHT
RED
DS3
DS2
U
TAB N1
BLK
TAB N2
RED
P
N1
N2
WHT
Io
3
1
(RED)
CNAC2
3
1
(WHT)
CNAC1
BLU
RED
N
L
POWER SUPPLY
/ N 230V 50Hz
U
LI
RED
YLW
GRN/YLW
S1
Interface unit /
Flow temp. controller
NI
U
ORN
S2 S3
BLU
BRN
1
2
E2
1
2
EI
(BLK)
CN52C
CN5
(RED)
CY1
CY2
TB1
2
BLK
2
BLK
10
WIRING SPECIFICATIONS6
FIELD ELECTRICAL WIRING (power wiring specifications)
Outdoor unit power supply
Wiring
size (mm²)
Wire No. ×
Circuit rating
*1.A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
*2.Max. 80 m
*3.The figures 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.
Caution: Be sure to install N-line. Without N-line, it could damage the unit.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2.
3. Be sure to connect the cables between Controller and Outdoor unit directly to the units (no intermediate connections are al-
Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may
4. Install an earth longer than other cables.
5. Do not construct a system with a power supply that is turned ON and OFF frequently.
ledomtinuroodtuO 85V
htrae,ylppusrewoptinuroodtuO
Interface unit/Flow temp. controller-Outdoor unit *2
Interface unit/Flow temp. controller-Outdoor unit earth *2
Remote controller-Interface unit/Flow temp. controller
Outdoor unit L-N (single)
Interface unit/Flow temp. controller-Outdoor unit S1-S2 *3
Interface unit/Flow temp. controller-Outdoor unit S2-S3 *3
Remote controller-Interface unit/Flow temp. controller *3
*3
~/N (single), 50 Hz, 230 V
25A1*yticapacrekaerBtiucriCtinuroodtuO
3 × Min. 4
3 × 1.5 (polar)
1 × Min. 1.5
2 × 0.3 (Non-polar)
AC 230V
AC 230V
DC 24V
DC 12V
Power supply cables and the cables between Controller and Outdoor unit shall not be lighter than polychloroprene sheathed
fl exible cables. (Design 60245 IEC 57
)
lowed).
cause insuffi cient insulation to ground or a poor electrical contact .
Power supply
Isolator
S1
A-Control
Outdoor Unit
S2
S3
Warning:
In case of A-control wiring,
there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between
power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals
when the power is energized. If isolator should be used between Interface unit/Flow temp. controller and outdoor unit, please use 3-pole type.
3 poles isolator
S1
Interface unit/
S2
Flow temp. controller
S3
11
REFRIGERANT SYSTEM DIAGRAM7
PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
Water OUT
Plate HEX
Water IN
TH32
TH6
CHECK/V
CHECK/V
Receiver
Strainer
(#100)
LEV-B
Strainer(#100) Strainer(#100)
REV/V
S/V
Strainer
(#100)
LEV-A
P-Sensor
COMP
CHECK/V
H/P SW
TH4
TH7
TH3
Distributor
TH33
TH8 P/B
Refrigerant flow in heating
Refrigerant flow in cooling
Symbol
COMP
H/P SW
Plate HEX
REV/V
S/V
CHECK/V
P-Sensor
P/B
LEV-A
LEV-B
TH32
TH3
TH4
TH6
TH7
TH8
TH33
Receiver
Part name
Compressor
High pressure switch (63H)
Plate Heat Exchanger
Reversing (4-way) valve (21S4)
Solenoid valve
Check valve
Pressure sensor (63HS)
Power board
Linear expansion valve -A
Linear expansion valve -B
Inlet water temperature thermistor
Liquid temperature thermistor
Discharge temperature thermistor
Plate HEX liquid temperature thermistor
Ambient temperature thermistor
Heatsink temperature thermistor
Comp.shell temperature thermistor
Receiver
Detail
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
For protection (OFF:4.15MPa)
ACH30 - 50 Plates (Alfa Laval)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
For production test use
High pressure / Low pressure / For production test use
For calculation of the condensing temperature from high pressure
Inverter power board
Heating:Secondary LEV Cooling:Primary LEV
Heating:Primary LEV Cooling:Secondary LEV
For freeze protection and for compressor frequency control
Heating:Evaporating temperature Cooling:Sub cool liquid temperature
For LEV control and for compressor protection
Heating:Sub cool liquid temperature Cooling:Evaporating temperature
For fan control and for compressor frequency control
For power board protection
For compressor protection
For accumulation of refrigerant
12
TROUBLESHOOTING8
8-1. TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and displayed on the control board of outdoor unit. Actions to be taken for service,
which depends on whether or not the trouble is reoccurring at service, are summarized in the table below. Check the contents
below before investigating details.
Unit conditions at service
The trouble is reoccurring.
The trouble is not reoccurring.
Error code
Displayed
Not displayed
Logged
Not logged
Actions to be taken for service (summary)
Judge what is wrong and take a corrective action according
to “8-3. Self-diagnosis action table”.
Conduct troubleshooting and ascertain the cause of the
trouble.
Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring
and etc.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical component,
controller board, and etc.
Re-check the abnormal symptom.
Conduct troubleshooting and ascertain the cause of the
trouble
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality concerning of parts such as
electrical component, controller board, and etc.
.
8-2. CHECK POINT UNDER TEST RUN
Before test run
• After installation of outdoor units, piping work and electric wiring work, re-check that there is no water leakage, loosened con-
nections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block (L, N) on the outdoor unit by 500 V Megger
and check that it is 1.0 M or over.
• Turn on power supply 12 hours before test run in order to protect compressor.
• Make sure to read operation manual before test run. (Especially items to secure safety.)
13
8-3. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Error Code
Abnormal point and detection method
1 No voltage is supplied to termi-
nal block (TB1) of outdoor unit.
a) Power supply breaker is
b) Contact failure or disconnecc) Open phase (L or N phase)
Case
turned off.
tion of power supply terminal
Judgment and action
1 Check following items.
a) Power supply breaker
b) Connection of power supply terminal
block. (TB1)
c) Connection of power supply terminal
block. (TB1)
None
2 Electric power is not charged to
power supply terminal of outdoor power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
Disconnection of connector
TABT or TABS
3 Electric power is not supplied
—
to outdoor controller circuit
board.
a) Disconnection of connector
(CNDC)
4 Disconnection of reactor (DCL)
5 Disconnection of outdoor noise
filter circuit board or parts failure in outdoor noise filter circuit
board
6 Defective outdoor power circuit
board
7 Defective outdoor controller
circuit board
2 Check following items.
a) Connection of power supply terminal block.
(TB1)
b) Connection of terminal on outdoor power
circuit board.
Check connection of the connector TABT or TABS.
Refer to 8-6.
3 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector CNDC on
the outdoor power circuit board.
Refer to 8-6.
4 Check connection of reactor. (DCL)
Check connection of “L1” and “L2” on the
active filter module. (ACTM)
Refer to 8-6.
5 a) Check connection of outdoor noise filter
circuit board. Refer to 8-6.
b) Replace outdoor noise filter circuit board.
Refer to 8-6.
6 Replace outdoor power circuit board.
7 Replace controller board (When items
above are checked but the units can not be
repaired.)
F5
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously from being
switched on.
63H: High-pressure switch
1 Disconnection or contact failure
of 63H connector on outdoor
controller circuit board
2 Disconnection or contact failure
of 63H
3 63H is working due to defective
parts.
4 Defective outdoor controller
circuit board
14
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to 8-6.
2 Check the 63H side of connecting wire.
3 Check for continuity of 63H.
Replace high pressure switch if it is defective.
4 Replace outdoor controller circuit board.
Error Code
EA
Eb
Abnormal point and detection method
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
1. Outdoor controller circuit board can
automatically check the number of
connected Interface unit/Flow temp. con-
troller. Abnormal if the number cannot be
checked automatically due to miswiring
of Interface unit/Flow temp. controlleroutdoor unit connecting wire and etc.
after power is turned on for 4 minutes.
2. Abnormal if outdoor controller circuit
board recognizes excessive number of
Interface unit/Flow temp. controller.
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
(converse wiring or disconnection)
Outdoor controller circuit board can
automatically set the unit number of
Interface unit/Flow temp. controller.
Abnormal if the Interface unit/Flow temp.
controller number cannot be set within 4
minutes after power on because of miswiring (converse wiring or disconnection) of
Interface unit/Flow temp. controller-outdoor
unit connecting wire.
Case
Contact failure or miswiring of
Interface unit/Flow temp. controlleroutdoor unit connecting wire
Diameter or length of Interface
unit/Flow temp. controller-outdoor unit connecting wire is out
of specified capacity.
Excessive number of Interface
unit/Flow temp. controller is
connected to 1 outdoor unit.
(2 units or more)
Defective transmitting receiving
circuit of outdoor controller
circuit board
Defective transmitting receiving
circuit of Interface/Flow temp.
controller board
Noise has entered into power
supply or Interface/Flow temp.
controller-outdoor unit connecting wire.
Contact failure or miswiring of
Interface unit/Flow temp. controller-outdoor unit connecting wire
Diameter or length of Interface
unit/Flow temp. controller-outdoor unit connecting wire is out
of specified capacity.
Defective transmitting receiving circuit
of outdoor controller circuit board
Defective transmitting receiving
circuit of Interface/Flow temp.
controller board
Noise has entered into power supply
or Interface unit/Flow temp. controller-outdoor unit connecting wire.
Judgment and action
Check disconnection or looseness or polarity
of Interface unit/Flow temp. controller-outdoor
unit connecting wire of Interface unit/Flow
temp. controller and outdoor units.
Check diameter and length of Interface unit/
Flow temp. controller-outdoor unit connecting
wire.
Total wiring length: 80 m
(Including wiring connecting each Interface
unit/Flow temp. controller unit and between
Interface unit/Flow temp. controller and out-
door unit)
Also check if the connection order of flat
cable is S1, S2, S3.
Check the number of Interface unit/Flow
temp. controller that is connected to 1 out-
door unit. (If EA is detected.)
~ Turn the power off once, and on again to
check.
Replace outdoor controller circuit board or
Interface/Flow temp. controller board
if abnormality occurs again.
Check transmission path, and remove the
cause.
The descriptions above, - , are for EA, Eb
and EC.
EC
Start-up time over
The unit cannot finish start-up process
within 4 minutes after power on.
Contact failure of Interface unit
/Flow temp. controller-outdoor
unit connecting wire
Diameter or length of Interface
unit/Flow temp. controlleroutdoor unit connecting wire is
out of specified capacity.
Noise has entered into power supply or Interface unit/Flow temp.
controller-outdoor unit connecting
wire.
15
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