Mitsubishi Electric MSZ-D30NA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES······································· 3
2. PART NAMES AND FUNCTIONS·····················4
3. SPECIFICATION················································5
4. OUTLINES AND DIMENSIONS ························ 7
5. WIRING DIAGRAM············································ 8
6. REFRIGERANT SYSTEM DIAGRAM···············9
7. SERVICE FUNCTIONS ···································10
8. MICROPROCESSOR CONTROL ···················12
9. TROUBLESHOOTING·····································19
10. DISASSEMBLY INSTRUCTIONS····················31
Wireless type
Models
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
No. OBH501
INDOOR UNIT
Outdoor unit service manual
MUZ-D•NA Series (OBH502)
MUY-D•NA Series (OBH502)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB501)

2

3
1TECHNICAL CHANGES
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
1. New model

4
Remote controller
Operation indicator
lamp
Remote control
receiving section
Emergency operation
switch
Horizontal vane
Air outlet
Air filter
(Catechin air filter)
Air inlet
Front panel
Air cleaning filter
(Anti-Allergy Enzyme Filter)
4
PART NAMES AND FUNCTIONS
2
ACCESSORIES
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
Installation plate 1
Installation plate screw 4 × 25 mm 7
Remote controller holder 1
Screw for × 3.5 × 1.6 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (Used for left or left-rear piping) 2
L-Joint pipe 1
Conduit plate 1
Air cleaning filter 2

55
3SPECIFICATION
Model MSZ-D30NA MSY-D30NA MSZ-D36NA MSY-D36NA
External finish White
Power supply V, phase, Hz 208 / 230 , 1 , 60
Max. fuse size (time delay)/ Disconnect switch A15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airflow
Low-Med.-High
HEAT Dry CFM 445-639-848 — 445-639-848 —
COOL Dry
(Wet)
CFM 389(350)-639(576)-848(763) 389(350)-639(576)-848(763)
Moisture removal pt./h 9.9 11.3 11.9
Sound level
Low-Med.-High
Cooling dB(A) 32-42-49 32-42-49 32-42-49 32-42-49
Heating dB(A) 34-42-49 — 34-42-49 —
Cond. drain connection O.D. in. 5/8
Dimensions
W in. 46-1/16
D in. 11-5/8
H in. 14-3/8
Weight Ib. 40
Remote controller Wireless type
Control voltage (by built-in transformer) 12-24 VDC
NOTE : Test conditions are based on ARI 210/240.

66
3-1. OPERATING RANGE
(1) POWER SUPPLY
3-2. OUTLET AIR SPEED AND COVERAGE RANGE
(2) OPERATION
The air coverage range is the figure up
to the position where the air speed is 1
ft./sec., when air is blown out horizon-
tally from the unit properly at the High
speed position.
The coverage range should be used
only as a general guideline since it var-
ies according to the size of the room
and furniture arranged inside the room.
Mode Condition
Intake air temperature (°F)
Indoor Outdoor
DB WB DB WB
Cooling
Standard temperature 80 67 95 —
Maximum temperature 90 73 115 —
Minimum temperature 67 57 14 —
Maximum humidity 78 % —
Heating
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 14 13
Model Mode Function Airlow
(CFM)
Air speed
(ft./sec.)
Coverage
range
(ft.)
MSZ-D30NA
MSZ-D36NA HEAT Dry 848 23.6 45.0
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
COOL
Dry 848 23.6 45.0
Wet 763 21.3 40.7
Rated voltage Guaranteed Voltage
Indoor unit
208/230 V
1 phase
60 Hz
Min.187 V 208 V 230 V Max.253 V

77
4OUTLINES AND DIMENSIONS
Unit : inch
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
Wireless remote controller
Piping Insulation
Liquid line
Drain hose
Gas line
Indoor unit
Air out
Air in
45-1/2
46-1/16
14-3/8
2-15/16 33-11/16 9-1/2
2-11/16
2-3/16 20-7/8 17-11/16
Installation plate
Piping
Drain hose
Wall hole ø3
2-5/16 3/4
14-3/8
1-7/8
4-11/16
7/811-5/81-7/8
1/8
5-3/8
5-7/8
2-5/8
2-1/2
2-15/16
ø1-1/4 O.D
ø9/16 I.D
ø1-15/16 O.D
ø1-1/4 I.D
ø3/8 19-11/16
(Flared connection ø3/8)
ø5/8 16-7/8
(Joint connection ø5/8)
Joint
ø1-15/16 O.D
ø1-1/4 I.D
ø5/8
(Flared connection ø5/8)
Inslation ø 1-1/8 Connected part ø9/16 O.D
4-11/16 or more 8-11/16 or more
9-3/8 or more
4-3/16 or more
3/8 or more 2-3/16 or more
In case of left,left back,
or left under piping (using spacer) 5-1/8 or more
2-13/16 or more
14-1/2 or more
Required Space (Indoor Unit)
11-5/8 1/4

8
5WIRING DIAGRAM
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA

9
REFRIGERANT SYSTEM DIAGRAM
6
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
Refrigerant flow in cooling
Refrigerant flow in heating
Unit:inch
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe ø5/8
(with heat insulator)
Flared connection
Indoor coil
thermistor
RT12(main)
Refrigerant pipe ø3/8
(with heat insulator)
Distributor
Indoor coil
thermistor
RT13(sub)
Strainer
Joint
Flared connection
Joint connection

10
7SERVICE FUNCTIONS
7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.
7-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-7.)
Set time : 1-minute 1-second
Set time : 3-minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is
shortened by short circuit-of JPG and JPS.)
How to set the remote controller exclusively for particular indoor unit
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote
controller for the indoor unit.
The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are
set.
The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below :
The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.
NOTE : For modification, take out
the batteries and press
the OPERATE/STOP (ON/
OFF) button twice or 3
times at first.
After finish modification,
put back the batteries then
press the RESET button.
J2
J1
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
Table 1
1 unit operation 2 units operation 3 units operation 4 units operation
No. 1 unit No modification Same as at left Same as at left Same as at left
No. 2 unit — Solder J1 Same as at left Same as at left
No. 3 unit — — Solder J2 Same as at left
No. 4 unit — — — Solder both J1 and J2