Mitsubishi Electric Mr.Slim PUZ-A18NHA4 User manual

SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL ································· 2
2. SAFETY PRECAUTION ································· 3
3. FEATURES····················································· 6
4. SPECIFICATIONS ·········································· 7
5. DATA······························································· 9
6. OUTLINES AND DIMENSIONS ··················· 13
7. WIRING DIAGRAM ······································ 16
8. WIRING SPECIFICATIONS·························· 20
9. REFRIGERANT SYSTEM DIAGRAM ············· 25
10. TROUBLESHOOTING·································· 28
11. EASY MAINTENANCE FUNCTION·············· 85
12. FUNCTION SETTING ··································· 88
13. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ·····96
14. DISASSEMBLY PROCEDURE··················· 106
No.OCH481
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
R410A
November 2010
[Model names]
PUZ-A18NHA4
PUZ-A24NHA4
PUZ-A30NHA4
PUZ-A36NHA4
PUZ-A42NHA4
PUZ-A18NHA4-BS
PUZ-A24NHA4-BS
PUZ-A30NHA4-BS
PUZ-A36NHA4-BS
PUZ-A42NHA4-BS
PUY-A12NHA4
PUY-A18NHA4
PUY-A24NHA4
PUY-A30NHA4
PUY-A36NHA4
PUY-A42NHA4
PUY-A12NHA4-BS
PUY-A18NHA4-BS
PUY-A24NHA4-BS
PUY-A30NHA4-BS
PUY-A36NHA4-BS
PUY-A42NHA4-BS
[Service Ref.]
PUZ-A18NHA4
PUZ-A24NHA4
PUZ-A30NHA4
PUZ-A36NHA4
PUZ-A42NHA4
PUZ-A18NHA4-BS
PUZ-A24NHA4-BS
PUZ-A30NHA4-BS
PUZ-A36NHA4-BS
PUZ-A42NHA4-BS
PUY-A12NHA4
PUY-A18NHA4
PUY-A24NHA4
PUY-A30NHA4
PUY-A36NHA4
PUY-A42NHA4
PUY-A12NHA4-BS
PUY-A18NHA4-BS
PUY-A24NHA4-BS
PUY-A30NHA4-BS
PUY-A36NHA4-BS
PUY-A42NHA4-BS
NOTE:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
PUZ-A24/30/36NHA4
PUY-A24/30/36NHA4
Outdoor unit
PARTS CATALOG (OCB481)

2
1REFERENCE MANUAL
1-1. INDOOR UNIT
Model name Service Ref. Service manual No.
PLA-A12/18/24/30/36/42BA4 PLA-A12/18/24/30/36/42BA4 OCH482
OCB482
PCA-A24/30/36/42KA4 PCA-A24/30/36/42KA4 OCH484
OCB484
PKA-A12/18HA4 PKA-A12/18HA4 OCH483
OCB483
PKA-A24/30/36KA4 PKA-A24/30/36KA4.TH OCH488
OCB488
PEA-A12/18AA4 PEA-A12/18AA4.TH HWE0807B
PEAD-A24/30/36/42AA4 PEAD-A24/30/36/42AA4.TH HWE0905A

3
2SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful with
the followings.
· Be sure to clean the pipes and make sure that the insides
of the pipes are clean.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
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 refrige-
rant 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.
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.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil etc.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
Store the piping to be used indoors during
installation, and both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminals, all supply
circuits must be disconnected.

4
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
[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) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new 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.)
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications.
· Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose · Only for R410A
· Use pressure performance of 5.09MPa·G or over.
3Electronic 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 —

5
2-3. CAUTIONS FOR REFRIGERANT PIPING WORK
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is
same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the
working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
1Thickness of pipes
Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness
shown below. (Never use pipes of 0.7 mm [7/256 inch] or below.)
2Dimensions of flare cutting and flare nut
The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that,
R410A is a refrigerant, which has higher risk of leakage because of its working pressure is higher than that of other
refrigerants. Therefore, to enhance air tightness and intensity, flare cutting dimension of copper pipe for R410A has
been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for
R410A also has partly been changed to increase intensity as shown below. Set copper pipe correctly referring to cop-
per pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
0.8 [1/32]
0.8 [1/32]
0.8 [1/32]
1.0 [5/128]
—
0.8 [1/32]
0.8 [1/32]
0.8 [1/32]
1.0 [5/128]
1.0 [5/128]
Nominal
dimensions[inch]
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness : mm [inch]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
9.1 [11/32-23/64]
13.2 [1/2-33/64]
16.6 [41/64-21/32]
19.7 [49/64-25/32]
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions[inch]
Flare cutting dimensions
Outside
diameter
Dimension A ( )
+0
-0.4
Unit : mm [inch]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
17.0 [43/64]
22.0 [7/8]
26.0 [1-3/64]
29.0 [1-9/64]
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions[inch]
Flare nut dimensions
Outside
diameter
Dimension B
Unit : mm [inch]
R410A R22
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Safety charger
Charge valve
Vacuum pump
Flare tool
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermis-
tor vacuum gauge and
vacuum valve
Charging cylinder
Air purge, refrigerant charge
and operation check
Gas leak check
Collection of refrigerant
Refrigerant charge
Apply to flared section
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Flaring work of piping
Bend the pipes
Cut the pipes
Weld the pipes
Refrigerant charge
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
gerant 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
Ester oil, ether oil and
alkylbenzene oil(minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adop-
ter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other
refrigerants
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
: 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.
Dimension A
Dimension B

6
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
(Max. 100ft, 30m (A42) / Max. 70ft, 20m (A12-36))
The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator always control the optimal refrigerant level
regardless of the length (A42: 100ft, 30m max. / A12-36: 70ft, 20m max. and 16ft, 5m min.) of piping. The additional
refrigerant charging work during installation often causes problems.
It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work done.
It also helps to speed up the installation time.
PUZ-A24/30/36NHA4
PUZ-A24/30/36NHA4-BS
PUY-A24/30/36NHA4
PUY-A24/30/36NHA4-BS
PUZ-A42NHA4
PUZ-A42NHA4-BS
PUY-A42NHA4
PUY-A42NHA4-BS
PUZ-A18NHA4
PUZ-A18NHA4-BS
PUY-A12/18NHA4
PUY-A12/18NHA4-BS

7
4 SPECIFICATIONS
Service Ref. PUZ-A18NHA4 PUZ-A24NHA4 PUZ-A30NHA4 PUZ-A36NHA4 PUZ-A42NHA4
PUZ-A18NHA4-BS PUZ-A24NHA4-BS PUZ-A30NHA4-BS PUZ-A36NHA4-BS PUZ-A42NHA4-BS
Power supply Phase Single
Cycle 60Hz
Voltage 208/230V
MCA A 13 18 25 25 26
MOCP A2030404040
Breaker size A 15 25 30 30 30
External finish Munsell 3Y 7.8/1.1
Heat exchanger Plate fin coil
Defrost method Reverse cycle
Crankcase heater kW -
Compressor Hermetic
Model SNB130FQCM1 TNB220FLHM TNB220FLHM TNB220FLHM ANV33FDPMT
Motor output kW 0.9 1.3 1.3 1.3 2.5
R.L.A. 12 12 12 12 20
L.R.A. 14 14 17.5 17.5 27.5
Starter type Inverter
Fan Fan(drive)%No. Propeller fan %1 Propeller fan %1 Propeller fan %1 Propeller fan %1 Propeller fan %2
Fan motor output kW 0.040 0.075 0.075 0.075 0.086 + 0.086
Fan motor F.L .A . 0.35 0.75 0.75 0.75 0.40 + 0.40
Airflow m3/min 34 55 55 55 100
CFM 1200 1940 1940 1940 3530
Sound level Cooling dB 48 48 48 48 51
Heating dB 47 50 50 50 55
Protection devices HP switch HP switch HP switch HP switch HP switch
LP switch
Comp.shell thermo Comp.shell thermo Comp.shell thermo Comp.shell thermo Discharge thermo
Dimension W mm 800 950 950 950 950
D mm 300+23 330+30 330+30 330+30 330+30
H mm 600 943 943 943 1350
W in. 31-1/2 37-12/32 37-12/32 37-12/32 37-12/32
D in. 11-13/16 + 7/8 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16
H in. 23-5/8 37-1/8 37-1/8 37-1/8 53-5/32
Weight kg 41 75 75 75 118
lbs 91 165 165 165 260
Refrigerant R410A
Charged kg 1.7 3.0 3.0 3.0 4.5
lbs 3 + 12/16 6 + 10/16 6 + 10/16 6 + 10/16 10
Ether (FV50S)
Control Linear expansion valve
Oil Model
Charged L 0.65 0.87 0.87 0.87 1.4
oz 20 28 28 28 45
Refrigerant Pipe size OD mm 6.35 9.52 9.52 9.52 9.52
piping Liquid in. 1/4 3/8 3/8 3/8 3/8
Pipe size OD mm 12.7 15.88 15.88 15.88 15.88
Gas in. 1/2 5/8 5/8 5/8 5/8
Connection method Indoor Flared
Connection method Outdoor Flared
Height difference m Max. 30
IU - OU ft Max. 100
Piping length m Max. 30 Max. 50 Max. 50 Max. 50 Max. 50
ft Max. 100 Max. 165 Max. 165 Max. 165 Max. 165

8
Service Ref. PUY-A12NHA4 PUY-A18NHA4 PUY-A24NHA4 PUY-A30NHA4 PUY-A36NHA4 PUY-A42NHA4
PUY-A12NHA4-BS PUY-A18NHA4-BS PUY-A24NHA4-BS PUY-A30NHA4-BS PUY-A36NHA4-BS PUY-A42NHA4-BS
Power supply Phase Single
Cycle 60Hz
Voltage 208/230V
MCA A 13 13 18 25 25 26
MOCP A152030404040
Breaker size A 15 15 25 30 30 30
External finish Munsell 3Y 7.8/1.1
Heat exchanger Plate fin coil
Defrost method -
Crankcase heater kW -
Compressor Hermetic
Model SNB130FQCM1 SNB130FQCM1 TNB220FLHM TNB220FLHM TNB220FLHM ANV33FDPMT
Motor output kW 0.9 0.9 1.3 1.3 1.3 2.5
R.L.A. 12 12 12 12 12 20
L.R.A. 14 14 14 17.5 17.5 27.5
Starter type Inverter
Fan Fan (drive) %No. Propeller fan %1 Propeller fan %1 Propeller fan %1 Propeller fan %1 Propeller fan %1 Propeller fan %2
Fan motor output kW 0.040 0.040 0.075 0.075 0.075 0.086 + 0.086
Fan motor F.L .A. 0.35 0.35 0.75 0.75 0.75 0.40 + 0.40
Airflow m3
/min 34 34 55 55 55 100
CFM 1200 1200 1940 1940 1940 3530
Sound level Cooling dB 46 48 48 48 48 51
Heating dB – – – – – –
Protection devices HP switch HP switch HP switch HP switch HP switch HP switch
LP switch
Comp.shell thermo Comp.shell thermo Comp.shell thermo Comp.shell thermo Comp.shell thermo Discharge thermo
Dimension W mm 800 800 950 950 950 950
D mm 300+23 300+23 330+30 330+30 330+30 330+30
H mm 600 600 943 943 943 1350
W in. 31-1/2 31-1/2 37-12/32 37-12/32 37-12/32 37-12/32
D in. 11-13/16 + 7/8 11-13/16 + 7/8 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16
H in. 23-5/8 23-5/8 37-1/8 37-1/8 37-1/8 53-5/32
Weight kg 37 40 74 74 74 117
lbs 82 89 163 163 163 258
Refrigerant R410A
Charged kg 1.3 1.7 3.0 3.0 3.0 4.5
lbs 2 +14/16 3 + 12/16 6 + 10/16 6 + 10/16 6 + 10/16 10
Control Linear expansion valve
Oil Model
Charged L 0.65 0.65 0.87 0.87 0.87 1.4
Ether (FV50S)
oz 20 20 28 28 28 45
Refrigerant Pipe size OD mm 6.35 6.35 9.52 9.52 9.52 9.52
piping Liquid in. 1/4 1/4 3/8 3/8 3/8 3/8
Pipe size OD mm 12.7 12.7 15.88 15.88 15.88 15.88
Gas in. 1/2 1/2 5/8 5/8 5/8 5/8
Connection method Indoor Flared
Connection method Outdoor Flared
Height difference m Max. 30 Max. 30 Max. 30 Max. 30 Max. 30 Max. 30
IU - OU ft Max. 100 Max. 100 Max. 100 Max. 100 Max. 100 Max. 100
Piping length m Max. 30 Max. 30 Max. 50 Max. 50 Max. 50 Max. 50
ft Max. 100 Max. 100 Max. 165 Max. 165 Max. 165 Max. 165

9
Piping Length (one way)
Charged
Factory
Service Ref. 50ft 60ft 70ft 80ft 90ft 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft
15m 18m 21m 24m 27m 30m 33m 37m 40m 43m 46m 49m 50m
PUY-A12NHA4-BS
PUY-A12NHA4 42 oz 44 oz 46 oz 48 oz 50 oz 52 oz - - - - - - - 46 oz
1.2 kg 1.2 kg 1.3 kg 1.4 kg 1.4 kg 1.5 kg - - - - - - - 1.3 kg
PUY-A18NHA4-BS
PUY-A18NHA4
PUZ-A18NHA4-BS
PUZ-A18NHA4 56 oz 58 oz 60 oz 62 oz 64 oz 66 oz - - - - - - - 60 oz
1.6 kg 1.6 kg 1.7 kg 1.8 kg 1.8 kg 1.9 kg - - - - - - - 1.7 kg
PUY-A24NHA4-BS
PUY-A24NHA4
PUZ-A24NHA4-BS
PUZ-A24NHA4 94 oz 100 oz 106 oz 112 oz 118 oz 124 oz 130 oz 136 oz 142 oz 148 oz 154 oz 160 oz 166 oz 106 oz
2.7 kg 2.8 kg 3.0 kg 3.2 kg 3.3 kg 3.5 kg 3.7 kg 3.9 kg 4.0 kg 4.2 kg 4.4 kg 4.5 kg 4.7 kg 3.0 kg
94 oz 100 oz 106 oz 112 oz 118 oz 124 oz 130 oz 136 oz 142 oz 148 oz 154 oz 160 oz 166 oz 106 oz
2.7 kg 2.8 kg 3.0 kg 3.2 kg 3.3 kg 3.5 kg 3.7 kg 3.9 kg 4.0 kg 4.2 kg 4.4 kg 4.5 kg 4.7 kg 3.0 kg
94 oz 100 oz 106 oz 112 oz 118 oz 124 oz 130 oz 136 oz 142 oz 148 oz 154 oz 160 oz 166 oz 106 oz
2.7 kg 2.8 kg 3.0 kg 3.2 kg 3.3 kg 3.5 kg 3.7 kg 3.9 kg 4.0 kg 4.2 kg 4.4 kg 4.5 kg 4.7 kg 3.0 kg
PUY-A30NHA4-BS
PUY-A30NHA4
PUZ-A30NHA4-BS
PUZ-A30NHA4
PUY-A36NHA4-BS
PUY-A36NHA4
PUZ-A36NHA4-BS
PUZ-A36NHA4
PUY-A42NHA4-BS
PUY-A42NHA4
PUZ-A42NHA4-BS
PUZ-A42NHA4 132 oz 136 oz 142 oz 148 oz 154 oz 160 oz 166 oz 172 oz 178 oz 184 oz 190 oz 196 oz 202 oz 160 oz
3.7 kg 3.9 kg 4.0 kg 4.2 kg 4.4 kg 4.5 kg 4.7 kg 4.9 kg 5.0 kg 5.2 kg 5.4 kg 5.6 kg 5.7 kg 4.5 kg
Longer pipe than 70 or 100 ft,additional charge is required.
PUZ-A42NHA4
Service Ref. PUZ-A42NHA4-BS
PUY-A42NHA4
PUY-A42NHA4-BS
Compressor model SNB130FQCM1 TNB220FLHM ANV33FDPMT
()
Winding Registance
U-V 0.640 0.880 0.266
U-W 0.640 0.880 0.266
W-V 0.640 0.880 0.266
(at 20°C,68°F )
PUY-A12,18NHA4-BS
PUY-A12,18NHA4
PUZ-A18NHA4-BS
PUZ-A18NHA4
PUY-A24,30,36NHA4-BS
PUY-A24,30,36NHA4
PUZ-A24,30,36NHA4-BS
PUZ-A24,30,36NHA4
5-1. REFILLING REFRIGERANT CHARGE (R410A : oz, kg)
5-2. COMPRESSOR TECHNICAL DATA
5DATA

10
5-3. NOISE CRITERION CURVES
5ft
3.3ft
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
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PUY-A18NHA4
PUY-A18NHA4-BS
PUZ-A18NHA4
PUZ-A18NHA4-BS
COOLING
MODE
HEATING
48
SPL(dB)
47
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PUY-A24/30/36NHA4
PUY-A24/30/36NHA4-BS
PUZ-A24/30/36NHA4
PUZ-A24/30/36NHA4-BS
COOLING
MODE
HEATING
48
SPL(dB)
50
LINE
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
PUY-A42NHA4
PUY-A42NHA4-BS
PUZ-A42NHA4
PUZ-A42NHA4-BS
COOLING
MODE
HEATING
51
SPL(dB)
55
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PUY-A12NHA4
PUY-A12NHA4-BS
COOLING
MODE
46
SPL(dB) LINE