Mitsubishi Electric Mr.SLIM PEAD-A24AA User manual

SERVICE MANUAL
<indoor unit> Service ref.
Models PEAD-A24AA
PEAD-A30AA
PEAD-A36AA
PEAD-A42AA
TM
1. SAFETY PRECAUTION ····························· 2
2. PART NAMES AND FUNCTIONS ·············· 3
3. SPECIFICATION ········································ 5
4. FAN PERFORMANCE AND
CORRECTED AIR FLOW ·························· 7
5. SOUND PRESSURE LEVELS ···················12
6. OUTLINES & DIMENSIONS ······················16
7. WIRING DIAGRAM ····································17
8. REFRIGERANT SYSTEM DIAGRAM ········18
9. HEATER CONTROL ··································18
10 . TROUBLESHOOTING ·······························21
11 . DISASSEMBLY PROCEDURE ··················35
CONTENTS
INDOOR UNIT
REMOTE CONTROLLER
ON/OFF
TEMP.
Series PEAD R410A
2009
SPLIT-TYPE, HEAT PUMP
AIR CONDITIONERS
NOTE:
• This manual describes only
service data of the indoor
units.

2
SAFETY PRECAUTION
1
1-1. ALWAYS OBSERVE FOR SAFETY
Cautions for units utilising refrigerant R410A
Use new refrigerant pipes.
Make sure that the inside and outside of refrige-
rant 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.
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.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
In case of using the existing pipes for R22, be careful with
the followings.
·For A36 and A42, be sure to perform replacement oper-
ation before test run.
·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.
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.)
Before obtaining access to terminal, all supply
circuits must be disconnected.
1-2. CAUTIONS RELATED TO NEW REFRIGERANT

3
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
PART NAMES AND FUNCTIONS
2
•Indoor Unit
Air intake (sucks the
air inside the room
into the unit)
In case of rear inlet
Air outlet
In case of bottom inlet

4
°F°C
°F°C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Display Section
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 prohib-
ited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
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.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons 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 corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 8–39˚C.
The display blinks if the temperature
is less than 8˚C or 39˚C 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.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Operation Section
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
lid
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
Note:
“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.
Built-in temperature sensor
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.
Wired remote controller

5
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan Fan (drive) ×No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High) m3/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan Fan (drive) ×No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High) m3/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan Fan (drive) ×No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High) m3/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
PEAD-A24AA
1 phase, 60Hz, 208/230V
15
2.63
1 phase, 60Hz, 208/230V
15
2.73
1 phase, 60Hz, 208/230V
15
3.30
Galvanized sheets
Plate fin coil
Sirocco fan ×2
0.121
2.10
14.5-18.0-21.0 (512-636-742)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
25-28-32
25-29-33
26-30-34
27-31-35
29-34-38
32 (1-1/4)
1100 (43-5/16)
732 (28-7/8)
250 (9-7/8)
33 (73)
PEAD-A30AA
PEAD-A36AA
Galvanized sheets
Plate fin coil
Sirocco fan ×2
0.121
2.18
17.5-21.0-25.0 (618-742-883)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
25-29-34
26-30-34
27-31-35
28-32-36
30-35-39
32 (1-1/4)
1100 (43-5/16)
732 (28-7/8)
250 (9-7/8)
33 (73)
Galvanized sheets
Plate fin coil
Sirocco fan ×2
0.244
2.64
24.0-29.0-34.0 (847-1024-1201)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
28-33-38
29-34-38
30-35-39
31-36-40
34-40-43
32 (1-1/4)
1400 (55-1/8)
732 (28-7/8)
250 (9-7/8)
41 (91)
SPECIFICATION
3

6
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan Fan (drive) ×No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High) m3/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
PEAD-A42AA
1 phase, 60Hz, 208/230V
15
3.50
Galvanized sheets
Plate fin coil
Sirocco fan ×2
0.244
2.80
29.5-35.5-42.0 (1042-4254-1483)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
31-36-40
33-36-40
33-37-41
34-39-42
37-41-45
32 (1-1/4)
1400 (55-1/8)
732 (28-7/8)
250 (9-7/8)
43 (95)

7
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-A24AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A24AA
(External static pressure 50Pa) 208-230V 60Hz
PEAD-A24AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A24AA
(External static pressure 100Pa) 208-230V 60Hz
PEAD-A24AA
(External static pressure 150Pa) 208-230V 60Hz
FAN PERFORMANCE AND CORRECTED AIR FLOW
4

8
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]
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]
100
[0.401]
90
[0.361]
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-A30AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A30AA
(External static pressure 50Pa) 208-230V 60Hz
PEAD-A30AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A30AA
(External static pressure 100Pa) 208-230V 60Hz
PEAD-A30AA
(External static pressure 150Pa) 208-230V 60Hz

9
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m3/min)[cfm]
External static pressure (Pa)[in.WG]
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]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
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]
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]
100
[0.401]
90
[0.361]
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-A36AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 50Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 100Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 150Pa) 208-230V 60Hz

10
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]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
250
[1.004]
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]
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]
100
[0.401]
90
[0.361]
Airflow rate (m3/min)[cfm] Airflow rate (m3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
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-A42AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 50Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 100Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 150Pa) 208-230V 60Hz