Vermont Casting MSY-D36NA, MSZ-D30NA, MSY-D30NA, MSZ-D36NA User Manual
INDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
No. OBH501
CONTENTS
10. DISASSEMBLY INSTRUCTIONS ···················· 31
PARTS CATALOG (OBB501)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Outdoor unit service manual
MUZ-D•NA Series (OBH502)
MUY-D•NA Series (OBH502)
1. TECHNICAL CHANGES
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
·······································
3
2
1
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
1. New model
TECHNICAL CHANGES
3
2
PART NAMES AND FUNCTIONS
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
Air cleaning filter
(Anti-Allergy Enzyme Filter)
Air filter
(Catechin air filter)
Air inlet
Front panel
ACCESSORIES
Air outlet
Horizontal vane
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 fi lter 2
Operation indicator
lamp
Remote control
receiving section
Emergency
switch
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
operation
Remote controller
4
4
3
Model MSZ-D30NA MSY-D30NA MSZ-D36NA MSY-D36NA
External fi nish White
Power supply V, phase, Hz
Max. fuse size (time delay)/ Disconnect switch
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airfl ow
Low-Med.-High
Moisture removal pt./h 9.9 11.3 11.9
Sound level
Low-Med.-High
Cond. drain connection O.D. in. 5/8
Dimensions
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.
SPECIFICATION
208 / 230 , 1 , 60
A15
HEAT Dry CFM 445-639-848 — 445-639-848 —
COOL Dry
(Wet)
Cooling dB(A) 32-42-49 32-42-49 32-42-49 32-42-49
Heating dB(A) 34-42-49 — 34-42-49 —
W in. 46-1/16
D in. 11-5/8
H in. 14-3/8
CFM 389(350)-639(576)-848(763) 389(350)-639(576)-848(763)
55
3-1. OPERATING RANGE
(1) POWER SUPPLY
Rated voltage Guaranteed Voltage
Indoor unit
208/230 V
1 phase
60 Hz
Min.187 V
208 V 230 V Max.253 V
(2) OPERATION
Mode Condition
Standard temperature 80 67 95 —
Cooling
Heating
Maximum temperature 90 73 115 —
Minimum temperature 67 57 14 —
Maximum humidity 78 % —
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 14 13
DB WB DB WB
Indoor Outdoor
3-2. OUTLET AIR SPEED AND COVERAGE RANGE
Intake air temperature (°F)
Model Mode Function
MSZ-D30NA
MSZ-D36NA
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
HEAT Dry 848 23.6 45.0
COOL
Airlow
(CFM)
Dry 848 23.6 45.0
Wet 763 21.3 40.7
Air speed
(ft./sec.)
Coverage
range
(ft.)
to the position where the air speed is 1
ft./sec., when air is blown out horizontally from the unit properly at the High
speed position.
The coverage range should be used
only as a general guideline since it varies according to the size of the room
and furniture arranged inside the room.
The air coverage range is the figure up
66
4
OUTLINES AND DIMENSIONS
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
14-3/8
2-15/16
2-5/16
Wireless remote controller
14-3/8
33-11/16
45-1/2
46-1/16
3/4
9-1/2
1-7/8
2-3/16
Air out
2-11/16
11-5/8 1/4
Air in
5-7/8
Liquid line
Gas line
Joint
Drain hose
Indoor unit
20-7/8 17-11/16
Wall hole ø3
Installation plate
Piping
Drain hose
2-1/2
2-5/8
2-15/16
Piping
ø3/8 19-11/16
(Flared connection ø3/8)
ø5/8 16-7/8
(Joint connection ø5/8)
ø5/8
(Flared connection ø5/8)
Inslationø1-1/8 Connected part
4-11/16
ø9/16 O.D
Unit : inch
7/811-5/81-7/8
5-3/8
1/8
Insulation
ø1-1/4 O.D
ø9/16 I.D
ø1-15/16 O.D
ø1-1/4 I.D
ø1-15/16 O.D
ø1-1/4 I.D
77
Required Space (Indoor Unit)
4-11/16 or more 8-11/16 or more
4-3/16 or more
3/8 or more
In case of left,left back,
or left under piping (using spacer) 5-1/8 or more
9-3/8 or more
2-13/16 or more
14-1/2 or more
2-3/16 or more
5
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
WIRING DIAGRAM
8
6
REFRIGERANT SYSTEM DIAGRAM
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
Indoor coil
thermistor
RT13(sub)
Room temperature
thermistor
RT11
Indoor
heat
exchanger
Strainer
Indoor coil
thermistor
RT12(main)
Distributor
Unit:inch
Refrigerant pipe ø5/8
(with heat insulator)
Flared connection
Joint
Joint connection
Flared connection
Refrigerant pipe ø3/8
(with heat insulator)
Refrigerant flow in cooling
Refrigerant flow in heating
9
7
SERVICE FUNCTIONS
MSZ-D30NA
MSZ-D36NA
MSY-D30NA
MSY-D36NA
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.)
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.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below :
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
J1
J2
press the RESET button.
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.
Table 1
1 unit operation 2 units operation 3 units operation 4 units operation
No. 1 unit No modifi cation 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
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.
10
7-3. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed
are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment
power has restored after power failure. Then, the unit will restart automatically.
Operation
If the main power has been cut, the operation settings remain.
After the power is restored, the unit restarts automatically according to the memory.
(However, it takes at least 3 minutes for the compressor to start running.)
How to release “AUTO RESTART FUNCTION”
Turn off the main power of the unit.
Solder the Jumper wire JR07 on the indoor electronic control P.C. board. (Refer to 9-7.)
CN211CN112
CN152
JR07
CN101
BZ
CN151
NOTE:
• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the
remote controller.
• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is
cancelled.
• If the unit has been off with the remote controller before power failure, the auto restart function does not work as the
power button of the remote controller is off.
• To prevent breaker off due to the rush of starting current, systematize other home appliance not to turn on at the
same time.
• When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting
current by adding to the system that allows the units to start one by one.
11
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