Mitsubishi Electric MUZ-GS30NA User manual

Models
MUZ-GS30NA -U1 MUZ-GS30NAH -U1
MUZ-GS36NA -U1 MUZ-GS36NAH -U1
MUY-GS30NA -U1
MUY-GS36NA -U1
PARTS CATALOG (OBB875)
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS··················3
3. SPECIFICATION ········································4
4. OUTLINES AND DIMENSIONS·····················6
5. WIRING DIAGRAM·····································7
6. REFRIGERANT SYSTEM DIAGRAM ·············9
7. DATA······················································ 11
8. ACTUATOR CONTROL ····························· 18
9. SERVICE FUNCTIONS······························ 19
10. TROUBLESHOOTING ······························· 20
11. DISASSEMBLY INSTRUCTIONS················· 40
HFC
utilized
R410A
OUTDOOR UNIT
SERVICE MANUAL
No. OBH875
REVISED EDITION-A
Indoor unit service manual
MSZ-GS•NA, MSY-GS•NA Series (OBH874)
OBH875 is void.
Revision A:
• A warning when opening or closing the
valve has been added.

2
1TECHNICAL CHANGES
Use the specied refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
MUZ-GS30NA MUZ-GS30NAH
MUZ-GS36NA MUZ-GS36NAH
MUY-GS30NA
MUY-GS36NA
1. New model
Revision A:
• A warning when opening or closing the valve has been added.
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and pull the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
WARNING
• When the refrigeration circuit has a leak, do not execute pump down with the
compressor.
• When pumping down the refrigerant, stop the compressor before disconnecting the
refrigerant pipes. The compressor may burst if air etc. get into it.
• When opening or closing the valve below freezing temperatures, refrigerant may
spurt out from the gap between the valve stem and the valve body, resulting in injuries.
OBH875A

3
MUZ-GS30NA MUZ-GS30NAH MUZ-GS36NA MUZ-GS36NAH MUY-GS30NA MUY-GS36NA
PART NAMES AND FUNCTIONS
2
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
OBH875A

4
3SPECIFICATION
Outdoor unit model
MUZ-GS30NA
MUZ-GS30NAH
MUY-GS30NA
MUZ-GS36NA
MUZ-GS36NAH
MUY-GS36NA
Capacity
Rated (Minimum~Maximum)
Cooling *1 Btu/h 30,700
(10,300 ~ 30,700)
32,000/33,200
(10,300 ~ 32,000)/(10,300 ~ 33,200)
Heating 47 *1,3 Btu/h 32,600
(9,800 ~ 34,000)
35,200
(9,800 ~ 36,000)
Capacity
Rated (Maximum) Heating 17 *2,3 Btu/h 20,000 (20,800) 21,600 (22,800)
Power consumption
Rated (Minimum~Maximum)
Cooling *1 W3,320
(650 ~ 3,320)
3,630/3,770
(650 ~ 3,630)/(650 ~ 3,770)
Heating 47 *1,3 W3,340
(590 ~ 3,580)
3,740
(590 ~ 4,000)
Power consumption
Rated (Maximum) Heating 17 *2,3 W 2,500 (2,600) 2,770 (2,920)
EER *1 [SEER] *4 Cooling 9.2 [18.1] 8.8 [16.2]
HSPF IV *5 Heating *3 NA: 9.6 NA: 10
NAH: 9.4 NAH: 9.8
COP Heating *1,3 2.86 2.76
Power supply V , phase , Hz 208/230, 1 , 60
Max. fuse size (time delay) A 20
Min. circuit ampacity A 19
Fan motor F.L.A A 0.93
Compressor
Model SNB220FQAM1T
R.L.A A 13.8
L.R.A A 17.3
Refrigeration oil  oz. (L)/(Model) 15.6 (0.46)/(FV50S)
Refrigerant control Linear expansion valve
Sound level *1Cooling dB(A) 55 56
Heating *3 dB(A) 57
Defrost method Reverse cycle
Dimensions
W in. 33-1/16
D in. 13
H in. 34-5/8
Weight Ib. NA: 121
NAH: 122
External nish Munsell 3Y 7.8/1.1
Remote controller Wireless type
Control voltage (by built-in transformer) V DC 12 - 24
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Liquid in. 1/4 (0.0315)
Gas in. 5/8 (0.0394)
Connection meth-
od
Indoor Flared
Outdoor Flared
Between the indoor
& outdoor units
Height di󰀨erence ft. 50
Piping length ft. 100
Refrigerant charge (R410A) 4 lb.
NOTE: Test conditions are based on AHRI 210/240.
*1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB)
(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB
*2: Rating conditions (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
*3: Only MUZ
OBH875A

5
Test condition
AHRI
210/240
Mode Test Indoor air condition (°F) Outdoor air condition (°F)
Dry bulb Wet bulb Dry bulb Wet bulb
SEER
(Cooling)
"A-Full" Cooling Steady State
at rated compressor speed 80 67 95 (75)
"B-Full" Cooling Steady State
at rated compressor speed 80 67 82 (65)
"B-Low" Cooling Steady State
at minimum compressor speed 80 67 82 (65)
"F-Low" Cooling Steady State
at minimum compressor speed 80 67 67 (53.5)
"E-Int" Cooling Steady State
at intermediate compressor speed *6 80 67 87 (69)
HSPF
(Heating)
"H1-Nom" Heating Steady State
at rated compressor speed 70 60 47 43
"H3-Full" Heating
at rated compressor speed 70 60 17 15
"H0-Low" Heating Steady State
at minimum compressor speed 70 60 62 56.5
"H1-Low" Heating Steady State
at minimum compressor speed 70 60 47 43
"H2-Int" Heating
at intermediate compressor speed *6 70 60 35 33
*6: At intermediate compressor speed
= ("Rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
*4, *5
(2) OPERATION
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 -4 -5
OPERATING RANGE
(1) POWER SUPPLY
Rated voltage Guaranteed voltage (V)
Outdoor unit
208/230 V
1 phase
60 Hz
Min. 187 208 230 Max. 253
OBH875A

6
OUTLINES AND DIMENSIONS
4
MUZ-GS30NA MUZ-GS30NAH MUZ-GS36NA MUZ-GS36NAH MUY-GS30NA MUY-GS36NA
Unit: inch
13
2
16-7/16
1-9/16
13-3/4
14-5/8
15-3/8
11/16
OVAL HOLES 2×3/8× 13/16
→
AIR IN
↓
AIR IN
↓AIR OUT
BOLT PITCH FOR INSTALLATION
DRAIN HOLE ø1-21/32
13
34-5/8
17-25/32
5/16
6-7/8 19-11/16
33-1/16 3-3/16
HANDLE
3-29/32
6-1/2
43
35
7-11/16
19/32
GAS REFRIGERANT
PIPE JOINT
LIQUID
REFRIGERANT
PIPE JOINT
SERVICE PANEL
VALVE COVER
SERVICE PORT
4 in OR MORE.
BASICALLY OPEN 20 in OR MORE WITHOUT ANY OBSTRUCTION IN FRONT AND BOTH SIDES OF THE UNIT.
14 in OR MORE.
20 in OR MORE.
OPEN TWO SIDES OF RIGHT
OR REAR SIDE.
4 in OR MORE.
FLARED ø15.88 (5/8”)
FLARED ø6.35 (1/4”)
REQUIRED SPACE
OBH875A

7
5WIRING DIAGRAM
MUZ-GS30NA MUZ-GS36NA
MUZ-GS30NAH MUZ-GS36NAH
OBH875A

8
MUY-GS30NA MUY-GS36NA
OBH875A

9
6REFRIGERANT SYSTEM DIAGRAM
MUZ-GS30NA MUZ-GS30NAH MUZ-GS36NA MUZ-GS36NAH MUY-GS30NA MUY-GS36NA
Outdoor
heat
exchanger
Flared connection
(Only GS30/36NAH)
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
Capillary tube
O.D. 0.157 ×
I.D. 0.094× 3-15/16
(ø4.0×ø2.4×100)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating (Only MUZ)
Refrigerant pipe
ø 5/8
(with heat insulator)
Refrigerant pipe ø 1/4
(with heat insulator)
LEV
(Only MUZ)
R.V. coil
heating ON
cooling OFF
Muffler
Strainer
#100
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Service port
(low pressure)
ACC
Service port
(high pressure)
Capillary tube
O.D. 0.157 ×
I.D. 0.094× 3-15/16
(ø4.0×ø2.4×100)
Strainer
#100
Unit: inch (mm)
OBH875A

10
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model
Refrigerant piping: ft. Piping size O.D: in.
Max. Length
A
Max. Height di󰀨erence
B Gas Liquid
MUZ-GS30NA
MUZ-GS30NAH
MUZ-GS36NA
MUZ-GS36NAH
MUY-GS30NA
MUY-GS36NA
100 50 5/8 1/4
ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 70 80 90 100
MUZ-GS30NA
MUZ-GS30NAH
MUZ-GS36NA
MUZ-GS36NAH
MUY-GS30NA
MUY-GS36NA
4 lb. 0 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20
Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
OBH875A