Mitsubishi SEH-1.6AR.TH, SEH-2.5AR.TH, SEH-2AR.TH, SUH-1.6VR.TH, SUH-2VR.TH Service Manual
...
TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. PART NAMES AND FUNCTIONS ········2
2. SPECIFICATIONS·································4
3. OUTLINES AND DIMENSIONS············6
4. WIRING DIAGRAM·······························9
5.
REFRIGERANT SYSTEM DIAGRAM
······12
6. DATA ···················································16
7. MICROPROCESSOR CONTROL·······20
8. TROUBLESHOOTING························27
9. DISASSEMBLY PROCEDURE···········35
10. PARTS LIST········································42
11. OPTIONAL PARTS ·····························48
<Indoor unit>
SEH-1.6AR.TH
SEH-2AR.TH
SEH-2.5AR.TH
No. OC165
[Models]
INDOOR UNIT
The Slim Line.
From Mitsubishi Electric.
REMOTE CONTROLLER
SUH-1.6VR.TH
SUH-2VR.TH
SUH-2.5VR.TH
<Outdoor unit>
MITSUBISHI ELECTRIC
12
11
10
9
8
7
6
5
4
3
2
1
29
28
27
26
25
24
23
22
21
20
19
18
TIMER TEMP
TIMER/TEMP.
UP
DOWN
POWER
COOL
ON/OFF
MODE
SELECT
FAN
SPEED
TIMER
MODE
DRY
HEAT
HIGH
LOW
AUTO
STOP
START
g
OUTDOOR UNIT
Ceiling Concealed
Series SEH
2
1
PART NAMES AND FUNCTIONS
● Indoor Unit
SEH-1.6AR.TH
SEH-2AR.TH
SEH-2.5AR.TH
Air outlet duct flange
Air outlet
Air inlet
(Selecting the either back side or bottom side)
SUH-1.6VR.TH
SUH-2VR.TH
Air inlet
Air outlet
Drain outlet
Piping
Drain hose
SUH-2.5VR.TH
Air inlet
Air outlet
● Outdoor Unit
3
● Remote controller
SEH-1.6AR.TH
SEH-2AR.TH
SEH-2.5AR.TH
MITSUBISHI ELECTRIC
12
11
10
9
8
7
6
5
4
3
2
1
29
28
27
26
25
24
23
22
21
20
19
18
TIMER TEMP
TIMER/TEMP.
UP
DOWN
POWER
COOL
ON/OFF
MODE
SELECT
FAN
SPEED
TIMER
MODE
DRY
HEAT
HIGH
LOW
AUTO
STOP
START
g
TIMER / TEMP.
This button is used to
change between display of
room temperature and
display of remaining timer
during "AUTO STOP"
operation. Green lamps
light in selected display
Remaining timer time
display
Lamps display
remaining timer time
or room temperature.
Lamps indicate time
remaining until timer stops
timed operation. Green
lamps corresponding to
remaining number of hours
light.
Room Temperature
display
Lamps display temperature
settings and actual room
temperatures.
● Temperature settings;
Green lamps light.
● Temperature in room;
Green lamps flash.
(Example display readings are for explanations
only ; autual display readings will differ.)
This button is used to
change between low and
high fan speeds. One of
two green lamps lights to
indicate fan speed in effect.
MODE SELECT button
This button is used to
change between cooling,
heating and DRY operation
modes. One of three green
lamps lights to indicate
mode in effect.
ON / OFF button
Pushing button starts
operation. Pushing again
stops operation. Green
lamp remains lit during
UP and DOWN buttons
● Temperature control (While "TEMP" green
lamps is lit.)
Use UP and DOWN buttons to set disired
temperature between 18 and 29°C.
● Timed operation (While green "TIMER"
lamp is lit.)
Use UP and DOWN buttons to set timed
operation between one and twelve hours.
TIMER MODE button
Used for selecting timed
starting or stopping. Green
lamps lights to indicate
timer mode selected.
● Pushing UP and Down buttons together for more than two seconds will initiate "trial run" or "inspection" mode. Avoid pushing
these buttons simultaneously during normal operation. Push ON / OFF button to cancel trial run or inspection mode if initiated
by accident.
● All green lamps turn off when air conditioner is stopped.
● Avoid operation of buttons with fingernails or other sharp objects. Sharp objects may scratch operating panel.
Attention :
Settings remain in effect until changed. Air conditioner
can be operated by simply pushing ON /OFF button
once settings have been made.
FAN SPEED button
Display Panel Operating Panel
4
Model
Function
Power supply
Capacity
Dehumidification
Air flow
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
kW
R/h
K/h
A
W
A(kW)
%
A
A
A
W
"
"
"
mm
mm
mm
mm
mm
mm
kg
kg
dB
dB
rpm
rpm
kg
R
k"
k"
k"
Capacity
Electrical
data
Coefficient of performance(C.O.P)
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Indoor unit
Indoor unit
Width
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at 25:)
RT12(at 25:)
RT61(at 0:)
Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator
Outdoor unit
Outdoor unit
Refrigerant filling capacity(R-22)
Thermistor
Weight
Special
remarks
Model
Output
Winding resistance (at 20:)
Model
Winding resistance (at 20:)
Model
Winding resistance (at 20:)
SEH-1.6AR.TH
Single phase, 220-240V, 50Hz
Cooling
SEH-2AR.TH
3.9-3.9
1.7
7.0-7.3
1460-1590
—
95-90
6.41-6.72
2.67-2.45
Heating
4.1-4.2
—
6.4-6.8
1350-1460
—
95-90
5.81-6.22
3.04-2.88
43
35
50
720-770
780-820
1.65
MS-56 O 0.52
RH-247VHAT
1200
C-R:2.13 C-S:3.91
PK6V19-EC
WHT-BLK :251.4 BLK-BLU :19.9
BLU-YLW :26.5 YLW-BRN :13.2
BRN-RED :50.0
RA6V40-EE
WHT-BLK :130.4
BLK-RED :134.6
59
39
52
810-850
810-845
1.8
MS-32(N-1) O 1.2
1100
270
700
850
605
290
35
3
1
10
10
33.18
780
Cooling
5.3-5.4
2.1
10.4-9.9
2270-2330
—
99-97
9.72-9.27
2.33-2.32
Heating
5.7-5.8
—
9.4-9.1
2050-2110
—
99-97
8.72-8.47
2.78-2.75
NH-38VMDT
1700
C-R:1.07 C-S:2.26
PK6V32-EC
WHT-BLK :161.9 BLK-BLU : 50.3
BLU-YLW :18.7 YLW-BRN :8.0
BRN-RED :39.2
RA6V50-OF
WHT-BLK :116.4
BLK-RED :111
1020
35-38 52-58
0.59-0.58 0.68-0.63
Refrigerant oil
SPECIFICATIONS
2
NOTE:Test conditions
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB24°C
Heating : Indoor DB20°C WB
Outdoor DB 7°C WB 6°C
5
Model
NOTE:Test conditions
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB24°C
Heating : Indoor DB20°C WB
Outdoor DB 7°C WB 6°C
Function
Power supply
Capacity
Capacity
Electrical
data
Coefficient of performance(C.O.P)
Compressor
Indoor
fan motor
Outdoor
fan motor
Dimensions
Weight
Special
remarks
Dehumidification
Air flow
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding resistance (at 20:)
Model
Winding resistance (at 20:)
Model
Winding resistance (at 20:)
Width
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Sound level
(Hi)
Fan speed
(Hi)
Fan speed
regulator
Refrigerant filling capacity(R-22)
Refrigerant oil
Thermistor
Height
Depth
Width
Height
Depth
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
RT11(at 25:)
RT12(at 25:)
RT61(at 0:)
kW
R/h
K/h
A
W
A(kW)
%
A
A
A
W
"
"
"
mm
mm
mm
mm
mm
mm
kg
kg
dB
dB
rpm
rpm
kg
R
k"
k"
k"
SEH-2.5AR.TH
Cooling
Single phase, 220-240V, 50Hz
6.6-6.7
3.0
1200
13.5-12.6
2950-2950
—
99-97
59
12.55-11.74
0.95-0.86
2.10-2.14
NH-47VMDT
2200
C-R :0.96 C-S :2.07
PK6V50-EC
WHT-BLK :101.1 BLK-BLU :56.1
BLU-YLW :14.7 YLW-BRN :6.7
BRN-RED :28.2
RA6V85-AA
WHT-BLK :62.7 BLK-YLW :30.2
YLW-RED :62.9
1100
270
700
870
850
295
35
72
43
53
860-890
720-750
3
2
2.4
MS-32(N-1) O 1.2
10
10
33.18
Heating
6.9-7.0
—
12.3-11.8
2680-2750
—
99-97
11.35-10.94
2.57-2.55
6
OUTLINES AND DIMENSIONS
3
INDOOR UNIT
SEH-1.6AR.TH
SEH-2AR.TH
SEH-2.5AR.TH
SUH-1.6VR.TH
SUH-2VR.TH
605
29220
50
183
500
161
850
74
30
100
157
35
30
Service panel
Liquid refrigerant
pipe joint
Refrigerant pipe
(flare)
Gas refrigerant
pipe joint
Refrigerant pipe
(flare)
6.35 (SUH-1.6/2VR.TH)
12.7 (SUH-1.6VR.TH)
15.88 (SUH-2VR.TH)
Air inlet
View A
A
Electrical parts box
Suspension
bolt
pitch
Air outlet
Access door
Service space(It is
necessary to maintain
a working service
area from the ceiling.)
20 mm or more
Access door
Electrical
parts
box
Suspension bolt pitch
Suspension bolt pitch
Drain plug R1 male
Refrigerent pipe(liquid)
{6.35(SEH-1.6/2AR.TH)
{9.52(SEH-2.5AR.TH)
Refrigerent pipe(gas)
{12.7(SEH-1.6AR.TH)
{15.88(SEH-2/2.5AR.TH)
Unit : mm
OUTDOOR UNIT
35
248
Drainage
3holes 16.2
350
20
290
310
345
10cm or more
50cm
If the right/left sides or
back side is vacant,the
front has only to be 50cm
unobstructed.
or m
ore
If the front or right/left sides
are vacant, the top has only
to be 10cm
10cm or more
unobstructed.
10cm or more
35cm
or m
ore
7
SUH-2.5VR.TH
More than 350 mm
More than 10 mm
Open as a rule
More than 500 mm if the
front and both sides are open.
More than 100 mm
More than 200 mm if three
area obstacles to both sides.
Open as a rule
More than 500 mm if the
back both sides and top
are open.
OUTDOOR UNIT
Unit : mm
362
330
150
500
Service space
500
10
39.5 27.5
200
Note:Allow adequate
upper clearance
10
Front opening
10
Outdoor Unit-Necessary surrounding clearance
1715
Air intake
500
4553
Refrigerant-pipe flared
connection [15.88 5/8F
Refrigerant-pipe flared
850
Terminal block for power line
Terminal block for indoor and outdoor unit connection
870
Service panel
Handle for moving
connection [9.52 3/8F
553
352
337
403
Knock out holes for
power line 2-[27
120
60
Knock out hole
for front piping
Knock out hole
(refrigerant,drainage
and wiring)
33
104
R20
0
2
R
for right piping
(refrigerant,drainage
and wiring)
45
42
Bottom
piping hole
25 max.
Standard bolt length
80
65
Front right piping holes-
17
R6
2-U-shaped
notched
holes
detail figures
12
185 185
Air intake
200
The upper side must be open.
Air outlet
1000For 10 units or less
302
724295
Outlet guide
installation hole
Side air intake
Handle for moving
Rear fresh
air intake
441
Drain hole
2-12o23 Oval holes
(standard bolt M10)
179 524
40 60524
Drain hole
33
23
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation)
100 10
Handle
for moving
95
138
Rear piping hole
8
REMOTE CONTROLLER
Remote controller cable installation
MITSUBISHI ELECTRIC
12
11
10
9
8
7
6
5
4
3
2
1
29
28
27
26
25
24
23
22
21
20
19
18
TIMER TEMP
TIMER/TEMP.
UP
DOWN
POWER
COOL
ON/OFF
MODE
SELECT
FAN
SPEED
TIMER
MODE
DRY
HEAT
HIGH
LOW
AUTO
STOP
START
75
69
108
117
108
96.5
12
90.5
11.6
3.6
33
117
33
g
Rear side wiring
arrangememt opening
Upper side wiring
arrangement
opening
Fixing hole
83.5
12
86
4.6
46
9.2
MITSUBISHI ELECTRIC
12
11
10
9
8
7
6
5
4
3
2
1
29
28
27
26
25
24
23
22
21
20
19
18
TIMER TEMP
TIMER/TEMP.
UP
DOWN
POWER
COOL
ON/OFF
MODE
SELECT
FAN
SPEED
TIMER
MODE
DRY
HEAT
HIGH
LOW
AUTO
STOP
START
Exposed remote controller
cable
Cable can be connected only to the
top of the remote controller.
(Right side, left side, and buttom are
not possible.)
g
●For exposed remote controller cable installation
Note : The cable for the remote controller has 10m (39ft) length and 12-core with connectors O.D. 5.8.
●For recessed remote controller cable installation
Unit : mm
Remote controller cable
Conduit tube
(local arrangement)
Switch box
(local arrangement)
Set screw (match with switch box),
local arrangement.
NOTE :1. Since the indoor fan motor (MF) is connected with 50 Hz power, if 60Hz power is used,change the wiring
connection showing fig:*1
Indoor Fan Motor(MF) for 60Hz
2. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.
3. Use copper conductors only. (For field wiring)
4. Symbols below indicate.
/:Terminal block, : Connector
How to remove the terminals shown at ”w” mark.
9
WIRING DIAGRAM
4
TB
CIRCUIT BREAKER
POWER SUPPLY
~/N
220-240V
TB
GRN/YLW
12VDC
3
RED
L
W
W
W
W
W
N
BRN
220-240V~
N
BLU
WHT
GRN/YLW
BLU
TO OUTDOOR
UNIT
CONNECTING
P.C
CONTROLLER
REMOTE
BOARD
CN
113104
CN CN
112
52
2
RT12
1212
CNR
120
CN
120
CN
104B
RT11
TRANS
HIC1
3
CN201
ELECTRONIC CONTROL P.C BOARD
NR11
52C
F11
4
3
2
1
BLU
YLW
YLW
BLU
SR144
LDFH
BLK BLK
8
LDCOM
LDC11
LDC12
LDFL
LDFM
LDFVL
SR142
SR143
SR141
GRN/YLW
WHT
ORN
RED
BRN
BRN
WHT
7
5
6
1
2
3
4
C11
RED
BLU
ORN
MF
50Hz
2
W
SR141
SR144
RT11
TB
TERMINAL BLOCK
RT12 INDOOR COIL
THERMISTOR
HIC1
DC/DC CONVERTER
NR11
MF
52C
F11
SYMBOL
NAME NAME
C11
SYMBOL
FAN MOTOR CAPACITOR
SOLID STATE RELAY
FUSE(3.15A)
COMPRESSOR CONTACTOR
ROOM TEMPERATURE THERMISTOR
VARISTOR
FAN MOTOR
NAMESYMBOL
~
REMOTE
CONTROLLER
INTERFACE
P.C. BOARD
”w” shows the terminals with a lock mechanism,so they cannot be removed when you pull the lead wire.
Be sure to pull the wire by pushing the locking lever (project part) of the terminal with a finger.
1Slide the sleeve.
2Pull the wire while pushing the locking lever.
BLUE
YELLOW
60
50
fig: *1
BLUE
INDOOR UNIT
SEH-1.6/2/2.5AR.TH
10
OUTDOOR UNIT
SUH-1.6/2VR.TH
NOTE :1. Use copper conductors only. (For field wiring)
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers
(N,2,3 and ;).
3. Symbols below indicate.
/:Terminal block, : Connector
4. ”w” shows the terminals with a lock mechanism,so they cannot be removed when you pull the lead wire.
Be sure to pull the wire by pushing the locking lever (project part) of the terminal with a finger.
1Slide the sleeve.
2Pull the wire while pushing the locking lever.
12VDC
220-240V
TO INDOOR
CONNECTING
UNIT
TB
RT61
21S4
BLK
BLK
4
MF
3
W
2
W
WHT
N
W
GRN/YLW
RED
F
BLU
WHT
DSAR
WHT
ORN
RED
3
2
1
WHT
WHT
RED
BLU
A1
VLT YLW
WHT
BLU
52C1
CR
A2
L1/1 T1/2
CN730
3
2
1
W
TAB20
YLW
52C1
T3/6L3/5
52C
WW
4
3
BLU
W
C1
CN711
C65
WHT
W
RED
BLK
W
123
SR61
F61
C
MC
S
4
CN661
IC881
TRANS
R
BLK
BLK
CN721
X62
NR61
DEICER
P.C. BOARD
WHTWHT
CZ
SYMBOL NAME NAME
C1
COMPRESSOR CAPACITOR
C65
F61 FUSE (2A)
F
FUSE (2A)
MC
COMPRESSOR
<INNER THERMOSTAT>
FAN MOTOR
MF
<INNER THERMOSTAT>
NR61 VARISTOR
SYMBOL
RT61
SR61
TB
X62
21S4
52C
52C1
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
REVERSING VALVE RELAY
SOLENOID COIL
CONTACTOR
COMPRESSOR CONTACTOR
NAMESYMBOL
IC881 DC/DC CONVERTER
DSAR
SURGE ABSORBER 1FAN MOTOR CAPACITOR
CR SURGE ABSORBER 2
CZ SURGE ABSORBER 3
11
SUH-2.5VR.TH
RED
ORN
WHT
BLK
YLW
12VDC
TB
YLW
2
1
BLK
WHT
ORN
RED
3
4
5
6
MF
X1
BRN
SR61
X62
BLK
CN721
CN730
2
1
3
BLK
21S4
1
5
3
C2
CN711
CN661
123
RT61
4
A2
A1
ORN
WHT
YLWVLT
TB2
CR
WHT
4
52C1
F61
NR61
TRANS
IC881
220-240V~
DSAR
GRN/YLW
RED
W
W
W
W
WW
3
2
N
TO INDOOR
UNIT
CONNECTING
WHT
RED
7
RED
VLT
BLU
26F1
X1
WHT
TAB20
52C
3
YLW
DEICER
P.C. BOARD
BLU
WHTWHT
CZ
T3/6L3/5
BLU
L1/1 T1/2
52C1
WHT
C1
RED
BLK
S
C
R
MC
BLU
8
F
CZ SURGE ABSORBER 3
CR SURGE ABSORBER 2
IC881 DC/DC CONVERTERF61 FUSE (2A)
CONTACTOR
SOLENOID COIL
21S4
X62
MF
FAN MOTOR
<INNER THERMOSTAT>
MC
COMPRESSOR
<INNER THERMOSTAT>
TB,TB2
SR61
RT61
NR61 VARISTOR
F
C2
SYMBOL NAME NAME
C1
DSAR
SYMBOL
COMPRESSOR CAPACITOR
SURGE ABSORBER 1
FAN MOTOR CAPACITOR
FUSE (2A)
TERMINAL BLOCK
52C1
THERMAL REED SWITCH
26F1
X1 FAN MOTOR RELAY
52C
COMPRESSOR CONTACTOR
REVERSING VALVE RELAY
SOLID STATE RELAY
DEFROST THERMISTOR
NAMESYMBOL
NOTE :1. Use copper conductors only. (For field wiring)
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers
(N,2,3 and ;).
3. Symbols below indicate.
/:Terminal block, : Connector
4. ”w” shows the terminals with a lock mechanism,so they cannot be removed when you pull the lead wire.
Be sure to pull the wire by pushing the locking lever (project part) of the terminal with a finger.
1Slide the sleeve.
2Pull the wire while pushing the locking lever.
OUTDOOR UNIT
12
5
REFRIGERANT SYSTEM DIAGRAM
Indoor
heat
exchanger
Outdoor
heat
exchanger
Distributor
(With strainer)
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Defrost
thermistor
RT61
Flared connection
Stop valve
Stop valve
(with service port)
Strainer
Strainer
Strainer
Capillary tube
({3.0x{1.8xR330)
Capillary
tube
({3.0x{1.6xR550)
Restrictor valve
Refrigerant flow in cooling
Compressor
Accumulator
Strainer 1
valve
Muffler
Refrigerant flow in heating
Refrigerant pipe [12.7
(Option)
(with heat insulator)
Refrigerant pipe
(Option) [6.35
(with heat insulator)
Dis
Pressure
Regulator
Reversing
INDOOR UNIT
SEH-1.6AR.TH
OUTDOOR UNIT
SUH-1.6VR.TH
Indoor
heat
exchanger
Outdoor
heat
exchanger
Distributor
(With strainer)
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Defrost
thermistor
RT61
Flared connection
Stop valve
Stop valve
(with service port)
Strainer
Capillary tube
({4.0X{2.4XR660)
Capillary
tube
({3.0X{1.6XR860)X2
Restrictor valve
Refrigerant flow in cooling
Compressor
Accumulator
Strainer 1
valve
Muffler
Refrigerant flow in heating
Refrigerant pipe [15.88
(Option)
(with heat insulator)
Refrigerant pipe
(Option) [6.35
(with heat insulator)
Dis
Pressure
Regulator
Strainer
Strainer
Reversing
INDOOR UNIT
SEH-2AR.TH
OUTDOOR UNIT
SUH-2VR.TH
13
INDOOR UNIT OUTDOOR UNIT
SEH-2.5AR.TH
SUH-2.5VR.TH
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room temperature
thermistor
RT11
Strainer
Distributor
(With strainer)
Strainer
Refrigerant pipe [15.88
(Option)
(with heat insulator)
Ball valve
Flared connection
Flared connection
Refrigerant pipe
(Option) [9.52
(with heat insulator)
Muffler
Accumulator
Strainer 3
Ball valve
(with service port)
Reversing
valve
Compressor
Strainer 2
Dis
Pressure
Regulator
Distributor
Capillary tube
({4.0x{2.0xR410)
Refrigerant flow in cooling
Refrigerant flow in heating
Outdoor
heat
exchanger
Defrost
thermistor
RT61
14
Models
A: Refrigerant piping
Max.length
15m(49ft)
Max. Height difference *
7m(23ft)
MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE
SEH-1.6AR.TH
SEH-2AR.TH
SEH-2.5AR.TH
Length : m(ft)
A
15(49)
Piping size O.D. : mm (in.)
Gas
Liquid
{12.7(1/2)
{6.35(1/4)
{15.88(5/8)
wIt does not matter which unit is higher.
Models
SEH-1.6AR.TH
SEH-2AR.TH
SEH-2.5AR.TH
Outdoor unit:precharged
(up to 7m)
1,650
1,800
Refrigerant piping length (one way)
7m08m509m
100
10m
150
11m
200
12m
250
13m
300
14m
350
15m
400
Calculation : (SEH-1.6/2AR)og=50g/mo(Refrigerant piping length minus 7m)
(SEH-2.5AR)og=65g/mo(Refrigerant piping length minus 7m)
If pipe length exceeds 7m, additional refrigerant (Freon 22) charge is required
ADDITIONAL REFRIGERANT CHARGE (R-22 : g)
{9.52(3/8)
2,400
65
130
195 260
325
390 455 520
15
EVACUATION PROCEDURES
Connect the refrigerant pipes (both the liquid and gas
pipes) between the indoor and the outdoor units.
Remove the service port cap of the stop/ball valve on the gas pipe side of the outdoor unit gas pipe.
(The stop/ball valve will not work in its initial state fresh out of the factory (totally closed with cap on).)
Connect the gauge manifold valve and the vacuum pump to the service
port of the stop/ball valve of the outdoor unit. : For SUH-1.6/2VR.TH connect to gas pipe side.
For SUH-2.5VR.TH connect to liquid pipe side.
Run the vacuum pump for more than 15 minutes and at this time confirm that the pressure gauge indicates
-0.1 Mpa (-76 cmHg).
Check the vacuum with the gauge manifold valve, then close the gauge manifold valve, and stop the
vacuum pump.
Leave as it is for one or two minutes. Make sure the pointer of the gauge manifold valve remains in the
same position.
After refrigerant pipes are connected and evacuated, fully open all stop/ball
valves on gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.
Pipe length :
7m maximum
No gas charge is
needed.
Pipe length
exceeding 7m
Charge the prescribed
amount of gas.
Remove the gauge manifold valve quickly from the service port of the stop/ball valve.
Tighten the cap to the service port to obtain the initial status.
Tighten the cap to the stop/ball valve.
Leak test
Ball valve
(liquid side)
Service port
Valve knob Lo
Valve knob Hi
Charge hose
Vacuum
pump
Manifold
valve
Compound gauge Pressure gauge
-1.01✕10 Pa
(-760mmHg)
Stop valve
Stop valve
Stop valve
Close
Caps
Gauge manifold valve
Gas pipe
Connection
pipe
Open
Vacuum pump
Service port
Hexagonal
wrench
Liquid pipe
Hexagonal
wrench
<SUH-2.5VR.TH>
<SUH-1.6/2VR.TH>
Loading...