Mitsubishi Electric PEAD Series User manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Model name
<Indoor unit>
Series PEAD
2016
PEAD-A12AA7
PEAD-A18AA7
PEAD-A24AA7
PEAD-A30AA7
PEAD-A36AA7
PEAD-A42AA7
INDOOR UNIT

2
HWE16080
CONTENTS
1. SAFETY PRECAUTION··········································································· 3
2. PART NAMES AND FUNCTIONS······························································ 4
3. SPECIFICATION ···················································································· 5
4. FAN PERFORMANCE AND CORRECTED AIR FLOW·································· 8
5. SOUND PRESSURE LEVELS ·································································15
6. OUTLINES & DIMENSIONS····································································21
7. WIRING DIAGRAM················································································23
8. REFRIGERANT SYSTEM DIAGRAM························································24
9. HEATER CONTROL ··············································································25
10. TROUBLESHOOTING··········································································28
11. DISASSEMBLY PROCEDURE ·······························································41

3
HWE16080
SAFETY PRECAUTION
1. SAFETY PRECAUTION
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must be disconnected.
1-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilising refrigerant R410A
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful with
the followings.
For A36 and A42, be sure to perform replacement
operation before test run.
Change flare nut to the one provided with this product.
Use a newly flared pipe.
Avoid using thin 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 indoors during
installation and 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.
Tools for R410A
Gauge manifold Flare tool
Charge hose Size adjustment gauge
Gas leak detector Vacuum pump adaptor
Torque wrench Electronic refrigerant charging scale
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of
compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant
will change and the efficiency will be lowered.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with a
flame, poisonous gases will be released.
<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.)

4
HWE16080
PART NAMES AND FUNCTIONS
Gravimeter
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 5.3MPa·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 —
2. PART NAMES AND FUNCTIONS
Indoor Unit
In case of bottom inlet
Air intake (sucks the
air inside the room
into the unit)
In case of rear inlet
Air outlet

5
HWE16080
SPECIFICATION
3. SPECIFICATION
INDOOR UNIT
Service Ref. PEAD-A12AA7
Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V
Max. Fuse Size A 15
Min. Circuit Ampacity A 1.45
([WHUQDO¿QLVK Galvanized sheets
Heat exchanger Plate fin coil
Fan Fan (drive) × No. Sirocco fan × 1
Fan motor output kW 0.085
Fan motor F.L.A 1.16
$LUÀRZ/RZ0LG+LJK m3/min (CFM) 10.0-12.0-14.0 (353-424-494)
External static pressure Pa (in.WG) 35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Operation control & Thermostat Remote controller & built-in
Sound pressure level
(Low-Mid-High) 35Pa (0.14 in.WG)
dB (A)
28-30-34
50Pa (0.20 in.WG) 28-30-34
70Pa (0.28 in.WG) 29-32-36
100Pa (0.40 in.WG) 29-33-37
150Pa (0.60 in.WG) 32-36-40
Field drain pipe O.D mm (in.) 32 (1-1/4)
Dimensions W mm (in.) 900 (35-7/16)
D mm (in.) 732 (28-7/8)
H mm (in.) 250 (9-7/8)
Weight kg (lbs) 26 (58)
INDOOR UNIT
Service Ref. PEAD-A18AA7
Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V
Max. Fuse Size A 15
Min. Circuit Ampacity A 1.69
([WHUQDO¿QLVK Galvanized sheets
Heat exchanger Plate fin coil
Fan Fan (drive) × No. Sirocco fan × 1
Fan motor output kW 0.085
Fan motor F.L.A 1.35
$LUÀRZ/RZ0LG+LJK m3/min (CFM) 12.0-14.5-17.0 (424-512-600)
External static pressure Pa (in.WG) 35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Operation control & Thermostat Remote controller & built-in
Sound pressure level
(Low-Mid-High) 35Pa (0.14 in.WG)
dB (A)
29-32-36
50Pa (0.20 in.WG) 30-33-37
70Pa (0.28 in.WG) 30-34-38
100Pa (0.40 in.WG) 31-35-39
150Pa (0.60 in.WG) 33-38-42
Field drain pipe O.D mm (in.) 32 (1-1/4)
Dimensions W mm (in.) 900 (35-7/16)
D mm (in.) 732 (28-7/8)
H mm (in.) 250 (9-7/8)
Weight kg (lbs) 28 (62)

6
HWE16080
SPECIFICATION
INDOOR UNIT
Service Ref. PEAD-A24AA7
Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V
Max. Fuse Size A 15
Min. Circuit Ampacity A 2.63
([WHUQDO¿QLVK Galvanized sheets
Heat exchanger Plate fin coil
Fan Fan (drive) × No. Sirocco fan × 2
Fan motor output kW 0.121
Fan motor F.L.A 2.10
$LUÀRZ/RZ0LG+LJK m3/min (CFM) 14.5-18.0-21.0 (512-636-742)
External static pressure Pa (in.WG) 35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Operation control & Thermostat Remote controller & built-in
Sound pressure level
(Low-Mid-High) 35Pa (0.14 in.WG)
dB (A)
30-32-36
50Pa (0.20 in.WG) 30-33-37
70Pa (0.28 in.WG) 30-34-38
100Pa (0.40 in.WG) 31-36-39
150Pa (0.60 in.WG) 33-38-42
Field drain pipe O.D mm (in.) 32 (1-1/4)
Dimensions W mm (in.) 1100 (43-5/16)
D mm (in.) 732 (28-7/8)
H mm (in.) 250 (9-7/8)
Weight kg (lbs) 31 (69)
INDOOR UNIT
Service Ref. PEAD-A30AA7
Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V
Max. Fuse Size A 15
Min. Circuit Ampacity A 2.73
([WHUQDO¿QLVK Galvanized sheets
Heat exchanger Plate fin coil
Fan Fan (drive) × No. Sirocco fan × 2
Fan motor output kW 0.121
Fan motor F.L.A 2.18
$LUÀRZ/RZ0LG+LJK m3/min (CFM) 17.5-21.0-25.0 (618-742-883)
External static pressure Pa (in.WG) 35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Operation control & Thermostat Remote controller & built-in
Sound pressure level
(Low-Mid-High) 35Pa (0.14 in.WG)
dB (A)
30-33-38
50Pa (0.20 in.WG) 30-34-39
70Pa (0.28 in.WG) 31-35-39
100Pa (0.40 in.WG) 32-37-40
150Pa (0.60 in.WG) 34-39-43
Field drain pipe O.D mm (in.) 32 (1-1/4)
Dimensions W mm (in.) 1100 (43-5/16)
D mm (in.) 732 (28-7/8)
H mm (in.) 250 (9-7/8)
Weight kg (lbs) 31 (69)

7
HWE16080
SPECIFICATION
INDOOR UNIT
Service Ref. PEAD-A36AA7
Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V
Max. Fuse Size A 15
Min. Circuit Ampacity A 3.30
([WHUQDO¿QLVK Galvanized sheets
Heat exchanger Plate fin coil
Fan Fan (drive) × No. Sirocco fan × 2
Fan motor output kW 0.244
Fan motor F.L.A 2.64
$LUÀRZ/RZ0LG+LJK m3/min (CFM) 24.0-29.0-34.0 (847-1024-1201)
External static pressure Pa (in.WG) 35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Operation control & Thermostat Remote controller & built-in
Sound pressure level
(Low-Mid-High) 35Pa (0.14 in.WG)
dB (A)
32-38-42
50Pa (0.20 in.WG) 33-38-42
70Pa (0.28 in.WG) 34-39-43
100Pa (0.40 in.WG) 36-40-44
150Pa (0.60 in.WG) 38-42-45
Field drain pipe O.D mm (in.) 32 (1-1/4)
Dimensions W mm (in.) 1400 (55-1/8)
D mm (in.) 732 (28-7/8)
H mm (in.) 250 (9-7/8)
Weight kg (lbs) 39 (86)
INDOOR UNIT
Service Ref. PEAD-A42AA7
Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V
Max. Fuse Size A 15
Min. Circuit Ampacity A 3.50
([WHUQDO¿QLVK Galvanized sheets
Heat exchanger Plate fin coil
Fan Fan (drive) × No. Sirocco fan × 2
Fan motor output kW 0.244
Fan motor F.L.A 2.80
$LUÀRZ/RZ0LG+LJK m3/min (CFM) 29.5-35.5-42.0 (1042-1254-1483)
External static pressure Pa (in.WG) 35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Operation control & Thermostat Remote controller & built-in
Sound pressure level
(Low-Mid-High) 35Pa (0.14 in.WG)
dB (A)
36-40-44
50Pa (0.20 in.WG) 36-40-44
70Pa (0.28 in.WG) 36-41-45
100Pa (0.40 in.WG) 37-43-46
150Pa (0.60 in.WG) 39-44-47
Field drain pipe O.D mm (in.) 32 (1-1/4)
Dimensions W mm (in.) 1400 (55-1/8)
D mm (in.) 732 (28-7/8)
H mm (in.) 250 (9-7/8)
Weight kg (lbs) 41 (91)

8
HWE16080
FAN PERFORMANCE AND CORRECTEDAIR FLOW
4. FAN PERFORMANCE AND CORRECTED AIR FLOW
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
7
[247]
9
[318]
11
[388]
13
[459]
17
[600]
15
[530]
19
[671]
21
[742]
7
[247]
9
[318]
11
[388]
13
[459]
17
[600]
15
[530]
19
[671]
21
[742]
7
[247]
9
[318]
11
[388]
13
[459]
17
[600]
15
[530]
19
[671]
21
[742]
7
[247]
9
[318]
11
[388]
13
[459]
17
[600]
15
[530]
19
[671]
21
[742]
7
[247]
9
[318]
11
[388]
13
[459]
17
[600]
15
[530]
19
[671]
21
[742]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
90
[0.361]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A12AA7
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A12AA7
(External static pressure 50Pa) 208-230V 60Hz
PEAD-A12AA7
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A12AA7
(External static pressure 100Pa) 208-230V 60Hz
PEAD-A12AA7
(External static pressure 150Pa) 208-230V 60Hz

9
HWE16080
FAN PERFORMANCE AND CORRECTEDAIR FLOW
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
10
[353]
15
[530]
20
[706]
Limit
Low
Middle
High
Rated point
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
80
[0.321]
70
[0.281]
80
[0.321]
70
[0.281]
100
[0.401]
90
[0.361]
60
[0.241]
10
[353]
15
[530]
20
[706]
Limit
Low
Middle
High
Rated point
0
[0]
100
[0.401]
50
[0.201]
150
[0.602]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m3/min)[cfm]
10
[353]
15
[530]
20
[706]
Airflow rate (m3/min)[cfm]
Limit
Low
Middle
High
Rated point
0
[0]
50
[0.201]
10
[353]
15
[530]
20
[706]
Limit
Low
Middle
High
Rated point
PEAD-A18AA7
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A18AA7
(External static pressure 50Pa) 208-230V 60Hz
PEAD-A18AA7
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A18AA7
(External static pressure 100Pa) 208-230V 60Hz
PEAD-A18AA7
(External static pressure 150Pa) 208-230V 60Hz

10
HWE16080
FAN PERFORMANCE AND CORRECTEDAIR FLOW
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
90
[0.361]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A24AA7
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A24AA7
(External static pressure 50Pa) 208-230V 60Hz
PEAD-A24AA7
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A24AA7
(External static pressure 100Pa) 208-230V 60Hz
PEAD-A24AA7
(External static pressure 150Pa) 208-230V 60Hz