Mitsubishi Electronics PLA-A36BA, PLA-A36BA1, PLA-A12BA, PLA-A42BA, PLA-A42BA1 User Manual
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
October 2007
SERVICE MANUAL
No. OCH420
REVISED EDITION-A
Indoor unit [Model names]
PLA-A12BA
PLA-A18BA
PLA-A24BA
PLA-A30BA
PLA-A36BA
PLA-A42BA
[Service Ref.]
PLA-A12BA PLA-A12BA1 PLA-A18BA PLA-A18BA1 PLA-A24BA PLA-A24BA1 PLA-A30BA PLA-A30BA1 PLA-A36BA PLA-A36BA1 PLA-A42BA PLA-A42BA1
Revision:
•PLA-A12/18/24/30/36/42BA1 are added in REVISED EDITION-A.
•Some descriptions have been modified.
•Please void OCH420.
NOTE:
•This manual describes only service data of the indoor units.
•RoHS compliant products have <G> mark on the spec name plate.
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CONTENTS |
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1. |
TECHNICAL CHANGES.......................... |
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2. REFERENCE MANUAL |
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3. |
SAFETY PRECAUTION........................ |
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4. |
PART NAMES AND FUNCTIONS ........ |
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5. |
SPECIFICATIONS................................. |
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6. NOISE CRITERION CURVES |
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Model name |
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7. OUTLINES AND DIMENSIONS |
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indication |
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8. |
WIRING DIAGRAM ................................ |
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INDOOR UNIT |
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9. |
REFRIGERANT SYSTEM DIAGRAM ...... |
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10. |
TROUBLESHOOTING ........................ |
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11. SPECIAL FUNCTION.......................... |
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ON/OFF TEMP |
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12. DISASSEMBLY PROCEDURE........... |
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TEMP. |
ON/OFF |
PARTS CATALOG (OCB420) |
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WIRELESS REMOTE |
WIRED REMOTE |
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CONTROLLER |
CONTROLLER |
3 3 2 2 3 |
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1 
TECHNICAL CHANGES
PLA-A12BA PLA-A18BA PLA-A24BA PLA-A30BA PLA-A36BA PLA-A42BA
PLA-A12BA1 PLA-A18BA1 PLA-A24BA1 PLA-A30BA1 PLA-A36BA1 PLA-A42BA1
INDOOR CONTROLLER BOARD(I.B) has been changed(11. SPECIAL FUNCTION is added).
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REFERENCE MANUAL |
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2-1. OUTDOOR UNIT SERVICE MANUAL |
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Service Ref. |
Service Manual No. |
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PUZ-A18/24/30/36/42NHA |
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PUZ-A18/24/30/36/42NHA-BS |
OC367 |
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PUY-A12/18/24/30/36/42NHA(1) |
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PUY-A12/18/24/30/36/42NHA(1)-BS |
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PUZ-HA36NHA |
OCH426 |
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OCB426 |
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2-2. TECHNICAL DATA BOOK |
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Series (Outdoor unit) |
Data Book No. |
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PUZ-A·NHA(-BS) |
OCS04 |
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PUY-A·NHA(-BS) |
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2
3 
SAFETY PRECAUTION
3-1. ALWAYS OBSERVE FOR SAFTY
Before obtaining access to terminal, all supply circuits must be disconnected.
3-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilising refrigerant R410A
Use new refrigerant pipes.
Make sure that the inside and outside of refrigerant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc.
In addition, use pipes with specified thickness.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.
Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.
Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.
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.
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.
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Tools for R410A |
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Gauge manifold |
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Flare tool |
Charge hose |
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Size adjustment gauge |
Gas leak detector |
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Vacuum pump adaptor |
Torque wrench |
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Electronic refrigerant |
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charging scale |
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Keep the 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.
[1]Cautions for service
(1)Perform service after recovering the refrigerant left in the unit completely.
(2)Do not release refrigerant in the air.
(3)After completing service, charge the cycle with specified amount of refrigerant.
(4)When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.
3
[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 |
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Specifications |
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Gauge manifold |
·Only for R410A |
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·Use the existing fitting specifications. (UNF1/2) |
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·Use high-tension side pressure of 5.3MPa·G or over. |
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Charge hose |
·Only for R410A |
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·Use pressure performance of 5.09MPa·G or over. |
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Electronic scale |
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Gas leak detector |
·Use the detector for R134a, R407C or R410A. |
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Adaptor for reverse flow check |
·Attach on vacuum pump. |
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Refrigerant charge base |
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Refrigerant cylinder |
·Only for R410A |
·Top of cylinder (Pink) |
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·Cylinder with syphon |
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Refrigerant recovery equipment |
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4
4 
PART NAMES AND FUNCTIONS
Drain pipe
Filter
Air outlet Liquid pipe
Gas pipe
i-see sensor (option)
Vane
Air intake (Intake grille)
5
LLWired remote controller
Display Section
Day-of-Week
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.
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 |
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TIMER |
Hr |
ON |
AFTER |
AFTER |
OFF |
ERROR CODE |
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FUNCTION |
°F°C |
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FILTER |
°F°C |
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WEEKLY |
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ONLY1Hr. |
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SIMPLE |
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AUTO OFF |
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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 46–102˚F. The display blinks if the temperature
is less than 46˚F or 102˚F 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.
“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.
Operation Section
Temperature setting buttons |
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Down |
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Up |
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Timer Menu button |
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(Monitor/Set button) |
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Mode button (Return button) |
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TEMP. |
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Set Time buttons |
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Back |
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MENU |
ON/OFF |
Ahead |
BACK |
MONITOR/SET |
DAY |
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Timer On/Off button |
PAR-21MAA |
CLOCK |
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(Set Day button) |
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Opening the |
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lid |
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ON/OFF |
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FILTER |
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CHECK |
TEST |
OPERATION |
CLEAR |
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Built-in temperature sensor
Note:
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
•“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
•“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as far as any of the indoor units is equipped with the function.
6
LLWireless remote controller
OPERATION MODE display
OPERATION MODE display
Indicates which operation mode is in effect.
display
The vertical direction of airflow is indicated.
display
Displays selected fan speed.
ON/OFF button
The unit is turned ON and OFF alternately each time the button is pressed.
FAN SPEED SELECT button
Changes the fan speed.
MODE SELECT button
Switches the operation mode between COOLING/DRY/FAN/HEATING and AUTO mode.
+In case the outdoor unit is cooling only type, the heating and auto mode are not available.
CHECK-TEST RUN button
Performs an inspection check or test operation. Do not use it for normal operation.
VANE CONTROL button
Changes the air flow direction.
CHECK TESTRUN display
Indicate that the unit is being checked or test-run.
MODELSELECT display
Blinks when model is selected.
COOL CHECK |
TEST |
°F |
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MODEL |
RUN |
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°C |
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DRY SELECT |
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STOP AMPM |
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AUTO FAN |
SWING |
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FAN |
START AMPM |
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HEAT NOT AVAILABLE |
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ON/OFF 
TEMP
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FAN |
AUTO STOP |
MODE |
VANE |
AUTO START |
CHECK |
LOUVER |
h |
TEST RUN |
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min |
SET |
RESET CLOCK |
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display
Lights up while the signal is transmitted to the indoor unit when the button is pressed.
Temperature setting display
Indicates the desired temperature setting which is set.
CLOCK display
Displays the current time.
TIMER display
Displays when in timer operation or when setting timer.
“ 
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” display
Displays the order of timer operation.
“
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” display
Displays whether timer is on or off.
button
Sets any desired room temperature.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch is set, the air conditioner will be automatically stopped at the preset time.
AUTO START (ON timer): when this switch is set, the air conditioner will be automatically started at the preset time.
"h" and "min" buttons
Buttons used to set the “hour and minute” of the current time and timer settings.
LOUVER button
Changes left / right airflow direction.
(Not available for this model.)
CLOCK button
RESET button
SET button
7
5 
SPECIFICATIONS
INDOOR UNIT
Service Ref.
Power supply (phase, cycle, voltage) Max. Fuse Size
Min. Circuit Ampacity External finish (Panel)
Heat exchanger
Fan Fan (drive) % No. Fan motor output Fan motor
Airflow (Low-Medium2-Medium1-High)
External static pressure Booster heater
Operation control & Thermostat
Noise level (Low-Medium2-Medium1-High) Field drain pipe O.D.
Dimensions W D H
Weight
A
A
kW F.L.A.
*/min(CFM)
Pa(mmAq)
kW
dB mm(in.) mm(in.) mm(in.) mm(in.) kg(lbs)
Service Ref.
Power supply (phase, cycle, voltage) |
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Max. Fuse Size |
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A |
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Min. Circuit Ampacity |
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A |
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External finish (Panel) |
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Heat exchanger |
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Fan |
Fan (drive) % No. |
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UNIT |
Fan motor output |
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kW |
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INDOOR |
Fan motor |
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F.L.A. |
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Airflow (Low-Medium2-Medium1-High) |
*/min(CFM) |
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External static pressure |
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Pa(mmAq) |
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Booster heater |
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kW |
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Operation control & Thermostat |
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Noise level (Low-Medium2-Medium1-High) |
dB |
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Field drain pipe O.D. |
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mm(in.) |
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Dimensions |
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W |
mm(in.) |
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D |
mm(in.) |
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H |
mm(in.) |
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Weight |
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kg(lbs) |
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Service Ref. |
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Power supply (phase, cycle, voltage) |
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Max. Fuse Size |
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A |
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Min. Circuit Ampacity |
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A |
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External finish (Panel) |
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Heat exchanger |
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Fan |
Fan (drive) % No. |
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UNIT |
Fan motor output |
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kW |
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INDOOR |
Fan motor |
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F.L.A. |
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Airflow (Low-Medium2-Medium1-High) |
*/min(CFM) |
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External static pressure |
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Pa(mmAq) |
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Booster heater |
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kW |
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Operation control & Thermostat |
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Noise level (Low-Medium2-Medium1-High) |
dB |
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Field drain pipe O.D. |
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mm(in.) |
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Dimensions |
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W |
mm(in.) |
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D |
mm(in.) |
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H |
mm(in.) |
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Weight |
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kg(lbs) |
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PLA-A12BA, PLA-A12BA1
Single phase,60Hz, 208/230V 15 1
Munsell 6.4Y 8.9/0.4 Plate fin coil
Turbo fan (direct) % 1 0.05 0.51
Dry: 11-12-13-15(390-420-460-530) Wet: 10-11-12-14(350-390-420-490)
0(direct blow)
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Remote controller & built-in 27-28-29-31
32 (1-1/4)
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 258 (10-3/16) |
PANEL : 35 (1-3/8) |
UNIT : 22 (49) |
PANEL: 6 (13) |
PLA-A18BA, PLA-A18BA1
Single phase,60Hz, 208/230V 15 1
Munsell 6.4Y 8.9/0.4 Plate fin coil
Turbo fan (direct) % 1 0.05 0.51
Dry: 12-14-16-18(420-490-570-640) Wet:11-13-15-17(390-460-530-600)
0(direct blow)
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Remote controller & built-in 28-29-31-32
32 (1-1/4)
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 258 (10-3/16) |
PANEL : 35 (1-3/8) |
UNIT : 22 (49) |
PANEL: 6 (13) |
PLA-A24BA, PLA-A24BA1
Single phase,60Hz, 208/230V 15 1
Munsell 6.4Y 8.9/0.4 Plate fin coil
Turbo fan (direct) % 1 0.05 0.51
Dry: 12-14-16-18(420-490-570-640) Wet: 11-13-15-17(390-460-530-600)
0(direct blow)
–
Remote controller & built-in 28-29-31-32
32(1-1/4)
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 258 (10-3/16) |
PANEL : 35 (1-3/8) |
UNIT : 23 (51) |
PANEL: 6 (13) |
8
Service Ref. |
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Power supply (phase, cycle, voltage) |
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Max. Fuse Size |
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A |
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Min. Circuit Ampacity |
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A |
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External finish (Panel) |
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Heat exchanger |
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Fan |
Fan (drive) % No. |
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UNIT |
Fan motor output |
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kW |
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INDOOR |
Fan motor |
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F.L.A. |
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Airflow (Low-Medium2-Medium1-High) |
*/min(CFM) |
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External static pressure |
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Pa(mmAq) |
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Booster heater |
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kW |
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Operation control & Thermostat |
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Noise level (Low-Medium2-Medium1-High) |
dB |
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Field drain pipe O.D. |
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mm(in.) |
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Dimensions |
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W |
mm(in.) |
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D |
mm(in.) |
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H |
mm(in.) |
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Weight |
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kg(lbs) |
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Service Ref. |
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Power supply (phase, cycle, voltage) |
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Max. Fuse Size |
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A |
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Min. Circuit Ampacity |
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A |
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External finish (Panel) |
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Heat exchanger |
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Fan |
Fan (drive) % No. |
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UNIT |
Fan motor output |
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kW |
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INDOOR |
Fan motor |
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F.L.A. |
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Airflow (Low-Medium2-Medium1-High) |
*/min(CFM) |
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External static pressure |
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Pa(mmAq) |
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Booster heater |
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kW |
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Operation control & Thermostat |
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Noise level (Low-Medium2-Medium1-High) |
dB |
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Field drain pipe O.D. |
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mm(in.) |
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Dimensions |
W |
mm(in.) |
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D |
mm(in.) |
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H |
mm(in.) |
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Weight |
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kg(lbs) |
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Service Ref. |
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Power supply (phase, cycle, voltage) |
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Max. Fuse Size |
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A |
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Min. Circuit Ampacity |
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A |
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External finish (Panel) |
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Heat exchanger |
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Fan |
Fan (drive) o No. |
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UNIT |
Fan motor output |
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kW |
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INDOOR |
Fan motor |
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F.L.A. |
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Airflow (Low-Medium2-Medium1-High) |
*/min(CFM) |
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External static pressure |
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Pa(mmAq) |
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Booster heater |
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kW |
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Operation control & Thermostat |
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Noise level (Low-Medium2-Medium1-High) |
dB |
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Field drain pipe O.D. |
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mm(in.) |
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Dimensions |
W |
mm(in.) |
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D |
mm(in.) |
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H |
mm(in.) |
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Weight |
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kg(lbs) |
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PLA-A30BA, PLA-A30BA1
Single phase,60Hz, 208/230V 15 1
Munsell 6.4Y 8.9/0.4 Plate fin coil
Turbo fan (direct) % 1 0.05 0.51
Dry: 14-16-18-21(490-570-640-740) Wet: 13-15-17-20(460-530-600-710)
0(direct blow)
–
Remote controller & built-in 28-30-32-34
32(1-1/4)
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 258 (10-3/16) |
PANEL : 35 (1-3/8) |
UNIT : 23 (51) |
PANEL: 6 (13) |
PLA-A36BA, PLA-A36BA1
Single phase,60Hz, 208/230V 15 2
Munsell 6.4Y 8.9/0.4 Plate fin coil
Turbo fan (direct) % 1 0.12 1.00
Dry: 20-23-26-30(710-810-920-1060) Wet: 19-22-25-29(670-770-880-1030)
0(direct blow)
–
Remote controller & built-in 32-34-37-40
32(1-4)
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 298 (11-3/4) |
PANEL : 35 (1-3/8) |
UNIT : 25 (55) |
PANEL : 6 (13) |
PLA-A42BA, PLA-A42BA1
Single phase,60Hz, 208/230V 15 2
Munsell 6.4Y 8.9/0.4 Plate fin coil
Turbo fan (direct) % 1 0.12 1.00
Dry: 22-25-28-31(780-880-990-1090) Wet: 21-24-27-30(740-850-950-1060)
0(direct blow)
–
Remote controller & built-in 34-36-39-41
32(1-1/4)
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 840 (33-1/16) |
PANEL : 950 (37-3/8) |
UNIT : 298 (11-3/4) |
PANEL : 35 (1-3/8) |
UNIT : 25 (55) |
PANEL : 6 (13) |
9
6 
NOISE CRITERION CURVES
PLA-A12BA PLA-A12BA1
|
90 |
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bar) |
80 |
|
= 0.0002 |
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|
70 |
|
|
dB (0 dB |
|
|
60 |
|
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LEVEL, |
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PRESSURE |
50 |
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SOUND |
40 |
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BAND |
30 |
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OCTAVE |
20 |
APPROXIMATE |
|
|
THRESHOLD OF |
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|
HEARING FOR |
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|
CONTINUOUS |
|
|
NOISE |
10
63 125
NOTCH SPL(dB) LINE
High 31
Medium1 29
Medium2 28
Low 27
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
250 |
500 |
1000 |
2000 |
4000 |
8000 |
BAND CENTER FREQUENCIES, Hz
PLA-A18BA |
NOTCH |
SPL(dB) LINE |
|||
PLA-A18BA1 |
High |
32 |
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Medium1 |
31 |
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Medium2 |
29 |
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Low |
28 |
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90 |
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bar) |
80 |
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= 0.0002 |
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70 |
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dB |
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NC-70 |
||
dB (0 |
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LEVEL, |
60 |
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PRESSURE |
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NC-60 |
|
50 |
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NC-50 |
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SOUND |
40 |
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NC-40 |
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BAND |
30 |
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NC-30 |
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OCTAVE |
20 |
THRESHOLD OF |
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APPROXIMATE |
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||
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HEARING FOR |
|
NC-20 |
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CONTINUOUS |
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NOISE |
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10 |
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63 |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
BAND CENTER FREQUENCIES, Hz
PLA-A24BA |
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NOTCH |
SPL(dB) |
LINE |
|||
PLA-A24BA1 |
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High |
32 |
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Medium1 |
31 |
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Medium2 |
29 |
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Low |
28 |
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90 |
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bar) |
80 |
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= 0.0002 |
70 |
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dB (0 dB |
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NC-70 |
|
60 |
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LEVEL, |
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NC-60 |
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PRESSURE |
50 |
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NC-50 |
|
40 |
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SOUND |
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NC-40 |
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BAND |
30 |
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NC-30 |
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OCTAVE |
20 |
APPROXIMATE |
|
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THRESHOLD OF |
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|
HEARING FOR |
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NC-20 |
||
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|||
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CONTINUOUS |
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NOISE |
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|
10 |
63 |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
|
|
||||||||
BAND CENTER FREQUENCIES, Hz
PLA-A30BA |
|
|
NOTCH |
SPL(dB) |
LINE |
||||
PLA-A30BA1 |
|
|
High |
34 |
|
||||
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Medium1 |
32 |
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|||||
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|||
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Medium2 |
30 |
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Low |
28 |
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|
90 |
|
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|
bar) |
80 |
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= 0.0002 |
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|
70 |
|
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dB (0 dB |
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NC-70 |
|
60 |
|
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LEVEL, |
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NC-60 |
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PRESSURE |
50 |
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NC-50 |
|
40 |
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SOUND |
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NC-40 |
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BAND |
30 |
|
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|
|
|
|
|
|
NC-30 |
|
OCTAVE |
20 |
APPROXIMATE |
|
|
|
|
|
|
|
|
THRESHOLD OF |
|
|
|
|
|
|
||
|
HEARING FOR |
|
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|
|
NC-20 |
||
|
|
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|
|||
|
|
CONTINUOUS |
|
|
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||
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|
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||
|
|
NOISE |
|
|
|
|
|
|
|
|
10 |
63 |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
|
|
||||||||
BAND CENTER FREQUENCIES, Hz
10
PLA-A36BA |
|
|
NOTCH |
SPL(dB) |
LINE |
||||
PLA-A36BA1 |
|
|
High |
40 |
|
||||
|
|
Medium1 |
37 |
|
|||||
|
|
|
|
|
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|||
|
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Medium2 |
34 |
|
|
|
|
|
|
|
|
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Low |
32 |
|
|
90 |
|
|
|
|
|
|
|
|
bar) |
80 |
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
= 0.0002 |
70 |
|
|
|
|
|
|
|
|
dB (0 dB |
|
|
|
|
|
|
|
|
NC-70 |
60 |
|
|
|
|
|
|
|
|
|
LEVEL, |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NC-60 |
|
|
|
|
|
|
|
|
|
|
|
PRESSURE |
50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NC-50 |
|
40 |
|
|
|
|
|
|
|
|
|
SOUND |
|
|
|
|
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|
|
|
|
|
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|
|
|
|
|
|
NC-40 |
|
|
|
|
|
|
|
|
|
|
|
BAND |
30 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NC-30 |
|
|
|
|
|
|
|
|
|
|
|
OCTAVE |
20 |
APPROXIMATE |
|
|
|
|
|
|
|
|
THRESHOLD OF |
|
|
|
|
|
|
||
|
HEARING FOR |
|
|
|
|
|
NC-20 |
||
|
|
CONTINUOUS |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
||
|
|
NOISE |
|
|
|
|
|
|
|
|
10 |
63 |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
|
|
||||||||
BAND CENTER FREQUENCIES, Hz
PLA-A42BA |
|
|
NOTCH |
SPL(dB) |
LINE |
||||
PLA-A42BA1 |
|
|
High |
41 |
|
||||
|
|
Medium1 |
39 |
|
|||||
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
Medium2 |
36 |
|
|
|
|
|
|
|
|
Low |
34 |
|
|
|
90 |
|
|
|
|
|
|
|
|
bar) |
80 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
= 0.0002 |
70 |
|
|
|
|
|
|
|
|
dB (0 dB |
|
|
|
|
|
|
|
|
NC-70 |
60 |
|
|
|
|
|
|
|
|
|
LEVEL, |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NC-60 |
|
|
|
|
|
|
|
|
|
|
|
PRESSURE |
50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NC-50 |
|
40 |
|
|
|
|
|
|
|
|
|
SOUND |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NC-40 |
|
|
|
|
|
|
|
|
|
|
|
BAND |
30 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NC-30 |
|
|
|
|
|
|
|
|
|
|
|
OCTAVE |
20 |
APPROXIMATE |
|
|
|
|
|
|
|
|
THRESHOLD OF |
|
|
|
|
|
|
||
|
HEARING FOR |
|
|
|
|
|
NC-20 |
||
|
|
CONTINUOUS |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
||
|
|
NOISE |
|
|
|
|
|
|
|
|
10 |
63 |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
|
|
||||||||
BAND CENTER FREQUENCIES, Hz
UNIT
CEILING
5ft
MICROPHONE
11
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