Mitsubishi Electric Mr.Slim PUHZ-SHW230YKA2 User manual

SERVICE MANUAL
CONTENTS
TECHNICAL CHANGES...................................... 2
1. SAFETY PRECAUTION................................... 3
2. SPECIFICATIONS............................................ 5
3. DATA ............................................................... 7
4. OUTLINES AND DIMENSIONS....................... 9
5. WIRING DIAGRAM........................................ 10
6. WIRING SPECIFICATIONS ........................... 12
7. REFRIGERANT SYSTEM DIAGRAM ........... 14
8. TROUBLESHOOTING ................................... 15
9. DISASSEMBLY PROCEDURE...................... 57
Note:
•This manual describes
service data of the outdoor
unit only.
R410A
PARTS CATALOG (OCB594)
[Model Name]
PUHZ-SHW230YKA2
[Service Ref.]
PUHZ-SHW230YKA2
PUHZ-SHW230YKA2R1
PUHZ-SHW230YKA2R2
SPLIT-TYPE, AIR CONDITIONER
No. OCH594
REVISED EDITION-B
December 2018
OCH594 REVISED EDITION-A
is void.
Revision:
•Added
PUHZ-SHW230YKA2R2
in REVISED EDITION-B.
•Some descriptions have
been modified.

2
OCH594B
TECHNICAL CHANGES
Service ref. have been changed as follows.
PUHZ-SHW230YKA2 PUHZ-SHW230YKA2R1
• A compliance with ErP directive Lot6 has been authorized.
PUHZ-SHW230YKA2R1 PUHZ-SHW230YKA2R2
• Power board, controller board and noise filter board have been changed.
• Quantity of refrigerant has been changed.
• Unit weight has been changed.

3
OCH594B
SAFETY PRECAUTION
1
Cautions for units utilizing refrigerant R410A
1-2. CAUTIONS RELATED TO NEW REFRIGERANT
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
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.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Electronic refrigerant
charging scale
Vacuum pump adaptor
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Do not use refrigerant other than R410A.
If other refrigerant (R22, etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil, etc.
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Preparation before the repair service.
• Prepare the proper tools.
• Prepare the proper protectors.
• Provide adequate ventilation.
• After stopping the operation of the air conditioner, turn off the power-supply breaker.
• Discharge the condenser before the work involving the electric parts.
Precautions during the repair service.
• Do not perform the work involving the electric parts with wet hands.
• Do not pour water into the electric parts.
• Do not touch the refrigerant.
• Do not touch the hot or cold areas in the refrigerating cycle.
• When the repair or the inspection of the circuit needs to be done without turning off the power,
exercise great caution not to touch the live parts.
[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.

4
OCH594B
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is a syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
2Charge hose · Only for R410A
· Use pressure performance of 5.09 MPa·G or over.
3Electronic weighing scale —
4Gas leak detector · Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base —
7Refrigerant cylinder · Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment —
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? Can R407C tools be used?
Gauge manifold Air purge, refrigerant charge
and operation check
Tool exclusive for R410A × ×
Charge hose Tool exclusive for R410A × ×
Gas leak detector Gas leak check Tool for HFC refrigerant × ○
Refrigerant recovery equipment Refrigerant recovery Tool exclusive for R410A × ×
Refrigerant cylinder Refrigerant charge Tool exclusive for R410A × ×
Safety charger Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Tool exclusive for R410A × ×
Charge valve Prevent gas from blowing out
when detaching charge hose
Tool exclusive for R410A × ×
Vacuum pump Vacuum drying and air purge Tools for other refrigerants
can be used if equipped with
adapter for reverse ow check
Δ(Usable if equipped
with adapter for
reverse flow)
Δ(Usable if equipped
with adapter for
reverse flow)
Bender Bend the pipes
Tools for other refrigerants can be used ○ ○
Pipe cutter Cut the pipes
Tools for other refrigerants can be used ○ ○
Welder and nitrogen gas
cylinder
Weld the pipes
Tools for other refrigerants can be used
○ ○
Refrigerant charging scale Charge refrigerant
Tools for other refrigerants can be used ○ ○
Vacuum gauge or thermistor
vacuum gauge and vacuum
valve
Check the degree of vacuum.
(Vacuum valve prevents back
ow of oil and refrigerant to
thermistor vacuum gauge)
Tools for other refrigerants can be used
○ ○
Charging cylinder Refrigerant charge Tool exclusive for R410A × -
×: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
Δ: Tools for other refrigerants can be used under certain conditions.
○: Tools for other refrigerants can be used.

5
OCH594B
SPECIFICATIONS
2
2-1. SPECIFICATION
2-1-1. PUHZ-SHW230YKA2
<Reference data> Plate heat exchanger (MWA2-38PA) *2 pcs [connected in parallel]
Nominal water ow L/min 65.9
Heating
(A7/W35)
Capacity kW 23.0
COP 3.65
Power input kW 6.31
Heating
(A7/W45)
Capacity kW 23.0
COP 3.02
Power input kW 7.62
Heating
(A2/W35)
Capacity kW 23.0
COP 2.37
Power input kW 9.71
Heating
(A2/W45)
Capacity kW 22.9
COP 2.02
Power input kW 11.32
Nominal water ow L/min 57.3
Cooling
(A35/W7)
Capacity kW 20.00
EER 2.22
Power input kW 9.01
Cooling
(A35/W18)
Capacity kW 20.00
EER 3.55
Power input kW 5.63
Rating conditions
Nominal operating condition
Heating (A2/W35)
Outside air temperature (Dry-bulb) + 2°C
Outside air temperature (Wet-bulb) + 1°C
Water temperature (inlet/outlet) + 30°C/+ 35°C
Heating (A2/W45)
Outside air temperature (Dry-bulb) + 2°C
Outside air temperature (Wet-bulb) + 1°C
Water temperature (inlet/outlet) + 40°C/+ 35°C
Heating (A7/W35)
Outside air temperature (Dry-bulb) + 7°C
Outside air temperature (Wet-bulb) + 6°C
Water temperature (inlet/outlet) + 30°C/+ 35°C
Heating (A7/W45)
Outside air temperature (Dry-bulb) + 7°C
Outside air temperature (Wet-bulb) + 6°C
Water temperature (inlet/outlet) + 40°C/+ 45°C
Cooling (A35/W7)
Outside air temperature (Dry-bulb) + 35 °C
Outside air temperature (Wet-bulb) + 24 °C
Water temperature (inlet/outlet) + 12 °C/+ 7 °C
Cooling (A35/W18)
Outside air temperature (Dry-bulb) + 35°C
Outside air temperature (Wet-bulb) + 24°C
Water temperature (inlet/outlet) + 23°C/+ 18°C
Note: "COP" and "Power input" in the above table are the values that do NOT contain the "pump input (based on EN 14511)".

6
OCH594B
2-1-2. Outdoor unit
Maximum outlet water temperature
*1 Hot gas with 4-way valve
*2 At distance of 1 m from outdoor unit
*3 grill
*4 With the optional air outlet guide, the operation at
−15℃outdoor temperature is possible.
40
45
50
55
60
65
−25 −20 −15 −10 −5 0510
Ambient temperature [°C]
Maximum outlet water temperature [°C]
*5 A weighted sound power level in accordance
with ISO9614-1 for EN14511 testing is
*6 Lower limit of use is −5℃ for EN14511 testing purpose.
75 dBA.
noitidnocgnitarepolanimoN
Heating(A7/W35)
7+)blub-yr
D
(erutarepmetriaedistuO ℃
6+)blub-teW(erutarepmetriaedistuO ℃
53+/03+)teltuo/telni(erutarepmetretaW ℃
Cooling(A35/W7)
53+)blub-yrD(erutarepmetriaedistuO ℃
42+)blub-teW(erutarepmetriaedistuO ℃
7+/21+)teltuo/telni(erutarepmetretaW ℃
Service Ref. PUHZ-SHW230YKA2
PUHZ-SHW230YKA2R1 PUHZ-SHW230YKA2R2
Running current Heating(A7/W35) A 9.6
Cooling(A35/W7) A 9.6
Power factor Heating(A7/W35) % 95
Cooling(A35/W7) % 95
Power supply (phase, voltage, cycle) 3 phase, 400 V, 50 Hz
Max. current A 26.0 20
Breaker size A 32 25
Outer casing Galvanized plate
External nish Munsell 3Y 7.8/1.1
Refrigerant control Liner expansion valve
Compressor Hermetic scroll
Model ANB66FJNMT
Motor output kW 4.7
Start type Inverter
Protection devices HP switch
LP switch
Discharge thermo
Overcurrent detection
Comp. surface thermo
Oil (Model) L 1.7 (FV50S)
Crankcase heater W —
Heat exchanger Air Plate n coil
Water Plate heat exchanger
Fan Fan (drive) × No. Propeller fan × 2
Fan motor output kW 0.150 × 2
Airow m³/min 140
(CFM) (4,940)
Defrost method Reverse cycle *1
Noise level (SPL) Heating dB 59 *2*5
Cooling dB 58 *2
Noise level (PWL) Heating dB 75
Dimensions Width mm (in) 1050 (41-5/16)
Depth mm (in) 330 + 30(*3) (13+1-3/16)
Height mm (in) 1338 (52-11/16)
Weight kg (lbs) 149 (328) 143 (315)
Refrigerant R410A
Quantity kg (lbs) 7.7 (17.0) 7.1 (15.7)
Guaranteed operating range
(Outdoor)
Heating °C −25(*6)to +21
DHW °C −25 to +35
Cooling °C −5(*4)to +46
Outlet water temp.
(Max. in heating, Min. in cooling)
Heating °C +60
Cooling °C +5
Nominal return water
temperature range
Heating °C +10 to +59
Cooling °C +8 to +28
Water ow rate range L/min 28.7 to 65.9

7
OCH594B
DATA
3
1.5m
1m
MICROPHONE
UNIT
GROUND
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SHW230YKA2
COOLING
MODE
HEATING
58
SPL(dB)
59
LINE
PUHZ-SHW230YKA2R1
PUHZ-SHW230YKA2R2
3-3. NOISE CRITERION CURVES
3-1. Additional refrigerant charge (R410A)
Service Ref.
Initial
charge
(kg)
Operation
method
Liquid
pipe
size
Total piping length (one way)
Amount of additional refrigerant charge (kg)
2 - 10 m
11 - 20 m 21 - 30 m 31 - 40 m 41–50 m 51–60 m 61–70 m 71–80 m
PUHZ-SHW230YKA2
PUHZ-SHW230YKA2R1
7.7 ATW/ATA/
AHU - - - - 1.2 2.4 3.6 4.8 5.2
PUHZ-SHW230YKA2R2*1 7.1
ATW ø12.7 - - - 1.4 2.8 4.2 5.6 7.0
ø9.52 - - - - 0.8 1.7 2.6 3.5
ATA/AHU ø12.7 - - 1.4 2.8 4.2 5.6 7.0 8.4
ø9.52 - - - 0.8 1.7 2.6 3.5 4.4
*1 Set the SW8-2 on controller board ON when the piping length is 10 m or less. (for models from PUHZ-SHW230YKA2R2)
3-2. Recharge refrigerant amount (R410A)
Service Ref. Operation
method
Liquid
pipe
size
Total piping length (one way)
Amount of recharge refrigerant (kg)
2 - 10 m
11 - 20 m 21 - 30 m 31 - 40 m 41–50 m 51–60 m 61–70 m 71–80 m
PUHZ-SHW230YKA2
PUHZ-SHW230YKA2R1
ATW/ATA/
AHU
ø12.7 5.5 6.6 7.7 8.9 10.1 11.3 12.5 12.9
ø9.52 5.4 6.3 6.7 8.3 9.4 10.4 11.5 11.8
PUHZ-
SHW230YKA2R2*1
ATW ø12.7 5.9 6.5 7.1 8.5 9.9 11.3 12.7 14.1
ø9.52 5.7 6.1 6.5 7.1 7.9 8.8 9.7 10.6
ATA/AHU ø12.7 6.5 7.1 8.5 9.9 11.3 12.7 14.1 15.5
ø9.52 6.1 6.5 7.1 7.9 8.8 9.7 10.6 11.5
*1 Set the SW8-2 on controller board ON when the piping length is 10 m or less. (for models from PUHZ-SHW230YKA2R2)

8
OCH594B
3-5. CAPACITY CORRECTION (Refrigerant piping length)
Cooling and heating capacity is lowered according to the piping length. Capacity can be obtained by referring to the following
capacity curves.
Corrected pipe length (m) = actual pipe length (m) + number of bends × 0.3 (m)
Cooling
Heating
HRP200
HRP200
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
70
75
80
85
90
95
100
Corrected pipe length [m]
Capacity ratio [%]
SHW230
SHW230
3-4. Standard operation data Reference data (connect to Plate HEX)
(MWA2-38PA) o2 pcs [connected in parallel]
Mode Cooling
(A35/W7)
Heating
(A7/W35)
Total
Capacity W 20,000 23,000
Input kW 9.01 6.31
Electrical circuit
Outdoor unit PUHZ-SHW230YKA2
Phase, Hz 3, 50
Voltage V 400
Current A 13.7 9.6
Refrigerant circuit
Discharge pressure MPa 3.0 2.0
Suction pressure MPa 0.7 0.6
Discharge temperature ºC 79 73
Condensing temperature ºC 49 35
Suction temperature ºC 8 8
Evaporating temperature ºC 6 2
Evaporator inlet temperature ºC 7 ——
Evaporator outlet temperature ºC 6 ——
Condenser inlet temperature ºC —— 65
Condenser outlet temperature ºC —— 34
Water
conditions
Flow volume L/min 57.3 65.9
Outlet water temperature ºC 7 35
Outdoor
conditions
Intake air
temperature
D.B. ºC 35 7
W.B. ºC 24 6
Piping length : Main 2.5 m, Branch 2.5 m/2.5 m
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is: 1 (MPa) = 10.2 (kgf/cm²)

9
OCH594B
OUTLINES AND DIMENSIONS
4
Unit: mm
PUHZ-SHW230YKA2
PUHZ-SHW230YKA2R1
PUHZ-SHW230YKA2R2
FOUNDATION
30
Service space
150
500
500
10
The diagram below shows a
basic example.
Explanation of particular details are given in the installation manuals etc.
Dimensions of space needed
for service access are
shown in the below diagram.
<Foundation bolt height>
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)
1 FREE SPACE (Around the unit)
2 SERVICE SPACE 3 FOUNDATION BOLTS
4 PIPING-WIRING DIRECTIONS
Piping and wiring connections can be made from 4 directions: FRONT,Right,Rear and Below.
Less than
Over
Over
Over
Over
Over 10mm
Over 10mm
FREE
Over 150mm
Over 1000mm
···Refrigerant GAS pipe connection (attached JOINT)ø25.4(Brazing locally) ···Refrigerant LIQUID pipe connection (FLARE) ø 12.7(1/2F) *1···Indication of STOP VALVE connection location. *2···(FLARE)ø 19.05(3/4F)
1
2
Example of Notes
Piping Knockout Hole Details
Power supply wiring hole (ø27Knockout)
Front piping hole
(Knockout)
Front trunking hole (Knockout)
Power supply wiring hole (ø40Knockout)
60 55
6373
55
27
26
75
92
60
ø92
Power supply wiring hole (ø27Knockout)
Right piping hole (Knockout)
Right trunking hole (Knockout)
Power supply wiring hole (ø40Knockout)
75 50
26 27
63
73
29 92
55
92
60
ø92
Power supply wiring hole (ø27Knockout)
Rear piping hole (Knockout)
Rear trunking hole (Knockout)
Power supply wiring hole (ø40Knockout)
75
6055
6373
26
55
27
60
92
ø92
Drain hole (5-ø33)
Bottom piping hole (Knockout)
81
45
154136
110 160 160 160
86
1050
Rear Air Intake
Air Discharge
Side Air Intake
Installation Feet
2-U Shaped notched holes (Foundation Bolt M10)
2-12×36 Oval holes (Foundation Bolt M10)
28
370
60
30
225
225
330
600
417
19
70
42
40 53 56 0
Handle for moving
Rear Air Intake
Side Air Intake
Handle for moving
632
369
26
1338
Handle for moving
Handle for moving
Earth terminal
362
Brazing
Service panel
Terminal connection
Left···Power supply wiring Right···Indoor/Outdoor wiring
*1,*2 : 442
982
986
*1 450
342
Air intake
2
1
Front piping cover
Rear piping cover

10
OCH594B
5WIRING DIAGRAM
PUHZ-SHW230YKA2 PUHZ-SHW230YKA2R1
FUSE1, FUSE2
TB1
MC
MF1,MF2
21S4
63H
TH3
TH4
TH6
TH7
LEV-A, LEV-B, LEV-C
DCL
Terminal Block<Power Supply>
TB2 Terminal Block<Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (4-Way Valve)
High Pressure Switch
63L Low Pressure Switch
63HS High Pressure Sensor
Thermistor<Suction>
TH32
Fuse
<T15AL250V >
Linear Expansion Valve
Reactor
ACL4
Reactor
P. B.
Power Circuit Board
RS
Rush Current Protect Resistor
CB1, CB2
Main Smoothing Capacitor
Noise Filter Circuit Board
N. F.
Controller Circuit Board
C. B.
SYMBOL NAME SYMBOL NAME SYMBOL NAME
Switch<Manual Defrost, Defect History Record
Reset, Refrigerant Address>
Switch<Test Operation>
Switch<Function Switch, Model Select>
SW1
SW4
SW5
SW9
Switch<Pump Down>
SWP
Connector<Emergency Operation>
CN31
F3, F4
CNMNT
CNVMNT
CNDM
Fuse<T6.3AL250V >
CNM
SV3/SS
Connector<Connection for Option>
Connector<Connection for Option>
SV1/CH
Connector<Connection for Option>
Connector<Connection for Option>
Connector<Connection for Option>
Connector<Connection for Option>
Capacitor
CY1, CY2
TH34
Thermistor<Liquid>
Thermistor<Discharge>
Thermistor<2-Phase Pipe>
Thermistor<Ambient>
Thermistor<Comp. Surface>
Switch<Function Switch>
Switch<Function Switch>
Switch<Model Select>
SW6
SW8
Switch<Function Switch>
SW7
CN2
(WH)
7
7
1
P. B.
2
2
1
2
2
1
CN4
(WH)
CN5
(RD)
WH
FUSE1 FUSE2
WH
RD
RD
MS
3
~
POWER
SUPPLY
3N
~
400V 50Hz
TO
INDOOR
UNIT
TB1
L3
L2
L1
N
31
2
2
13
CNDC
(PK)
CNL
(BU)
311 2
CNCT
(RD)
CNAC2
(RD)
31
CNAC1
(WH)
BK BK
LO1
LO2
LO3
LI1
LI2
LI3
NI
RD
WH
BU
BK
GNYE
GD2GD1
RD
WH
BK
N. F.
TB2
DCL
ACL4
S3
S2
S1
OG YE
CY2 CY1
BN
RD
RD
RS
RD
WH
WH
WH
BK
BK
BK X52A
BK
BK
TB-P2
TB-P1
TB-C1 TB-N1
CB1 CB2
W
V
MC
U
TB-L1
TB-L2
TB-L3
SC-U
SC-V
SC-W
RD
TH6TH7 TH4TH3
21S4
t˚t˚t˚t˚
LEV-A
CNS
(WH)
CNAC
(WH)
CNDC
(PK)
F3
F4 21S4
(GN)
CN2
(WH)
CN4
(WH)
TH7/6
(RD)
TH3
(
WH )
TH4
( WH )
TRANS
CNM
(WH)
LED1 LED2
X52
SV1
/CH
(GY)
X54
63H
(YE)
2
7
1 4 1 2 2 1
1 3
1 14
1 2
1 7
3
1
13
1 2
3 4
31 31
LEV-A
(WH)
51
SV3
/SS
(WH)
X51
31
MF1 CNF1
(WH)
17
63L
63H
63L
(RD)
1 3
31
TH34
t˚
2 1
TH34
(RD)
63HS
(WH)
63HS
LEV-B
(RD)
M
LEV-B
51
M
MF2 CNF2
(WH)
17
2
CNDM
(WH)
1
3
SW7
SW6SW1
SW9
CN31
SW5
SW8SW4
SWP
C. B.
TH32
(BK)
TH32
t˚
1 2
*1*1
*3
CNVMNT
(WH)
CNMNT
(WH)
31 1 5
5
LEV-C
(BU)
5
1
LEV-C
5
M
MS
3~
MS
3~
35
CN5
(WH)
3 1
TB7
2
1
CND
(WH)
CN2M
(WH)
M-NET
A B S
When M-NET Adapter is connected
5
3
5
1
M-NET ADAPTER
MODEL SW6
SW5-6 *2
1 2 3 4 5 6 7 8
*2
SW5 -1 to 5 : Function Switch.
OFF
1 2 3 4 5 6
OFF
ON
230Y
ON
*1 MODEL SELECT
The black square ( ) indicates
a switch position.
1 2 3 4
OFF
ON
1 2 3 4
OFF
ON
SW9-3,9-4 *4
Ambient temp.
3ºC or less
(Default setting )
*4 SW9-1 to 2 : Function Switch
0ºC or less
SW9-3,9-4 *4
Ambient temp.
−3ºC or less −6ºC or less
1 2 3 4
OFF
ON
1 2 3 4
OFF
ON
SW9-3,9-4 *4
Ambient temp. SW9-3,9-4 *4 Ambient temp.
*3 Ambient temp. of ZUBADAN Flash Injection becomes effective.
The black square ( ) indicates a switch position.