OUTDOOR UNIT
SERVICE MANUAL
No. OBH498
HFC
utilized
R410A
Wireless type
Models
MUZ-FD09NA
MUZ-FD09NA- U1
MUZ-FD12NA
MUZ-FD12NA- U1
Indoor unit service manual
MSZ-FD•NA Series (OBH497)
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 4
4. OUTLINES AND DIMENSIONS ························ 6
5. WIRING DIAGRAM············································ 7
6. REFRIGERANT SYSTEM DIAGRAM ··············· 8
7. DATA·································································· 9
8. ACTUATOR CONTROL··································· 15
9. SERVICE FUNCTIONS ··································· 16
10. TROUBLESHOOTING····································· 16
11. DISASSEMBLY INSTRUCTIONS···················· 32
PARTS CATALOG (OBB498)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
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1 TECHNICAL CHANGES
MUZ-FD09NA MUZ-FD12NA MUZ-FD09NA -
MUZ-FD12NA -
U1
U1
1. New model
2 PART NAMES AND FUNCTIONS
MUZ-FD09NA
MUZ-FD12NA
Air inlet
Piping
Drain hose
Air outlet
Drain outlet
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SPECIFICATION |
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Outdoor unit model |
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MUZ-FD09NA |
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MUZ-FD12NA |
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Capacity |
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Cooling |
1 |
Btu/h |
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9,000 (2,800~9,000) |
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12,000 (2,800~12,000) |
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Rated (Minimum~Maximum) |
Heating 47 |
1 |
Btu/h |
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10,900 (3,000~18,000) |
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13,600 (3,000~21,000) |
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Capacity Rated |
Heating 17 |
2 |
Btu/h |
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12,500 |
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13,600 |
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Power consumption |
Cooling |
1 |
W |
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650 (160~650) |
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960 (160~960) |
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Rated (Minimum~Maximum) |
Heating 47 |
1 |
W |
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750 (150~2,400) |
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980 (150~2,400) |
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Power consumption Rated |
Heating 17 |
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W |
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1,730 |
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1,780 |
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EER 1 [SEER] 3 |
Cooling |
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13.8 [23.0] |
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12.5 [22.0] |
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HSPF IV(V) |
4 |
Heating |
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10.55 (7.4) |
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10.55 (7.4) |
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COP |
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Heating |
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1 |
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4.30 |
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4.10 |
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External nish |
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Munsell 3Y 7.8/1.1 |
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Power supply |
V , phase , Hz |
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208/230 , 1 , 60 |
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Max. fuse size (time delay) |
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A |
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15 |
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Min. circuit ampacity |
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A |
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12 |
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Fan motor |
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F.L.A |
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0.56 |
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Compressor |
Model |
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SNB130FQAH |
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R.L.A |
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8.6 |
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L.R.A |
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10.8 |
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Refrigerant control |
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Liner expansion valve |
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Sound level |
1 |
Cooling |
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dB(A) |
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48 |
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48 |
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Heating |
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dB(A) |
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49 |
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49 |
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Defrost method |
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Reverse |
cycle |
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Dimensions |
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W |
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in. |
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31-1/2 |
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D |
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in. |
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11-1/4 |
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H |
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in. |
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21-5/8 |
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Weight |
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Ib. |
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80 |
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Remote controller |
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Wireless type |
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Control voltage (by built-in transformer) |
VDC |
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12 - 24 |
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Refrigerant piping |
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Not supplied |
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Refrigerant pipe size |
Liquid |
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in. |
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1/4 (0.0315) |
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(Min. wall thickness) |
Gas |
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in. |
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3/8 (0.0315) |
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Connection method |
Indoor |
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Flared |
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Outdoor |
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Flared |
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Between the indoor & |
Height differ- |
ft. |
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40 |
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ence |
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outdoor units |
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Piping length |
ft. |
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65 |
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Refrigerant charge (R410A) |
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2 lb. 9 oz. |
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Refrigeration oil (Model) |
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NE022 |
NOTE : Test conditions are based on ARI 210/240.
1 : Rating conditions (Cooling) — Indoor : 80 FDB, 67 FWB, Outdoor : 95 FDB, (75 FWB)Rated frequency (Heating) — Indoor : 70 FDB, 60 FWB, Outdoor : 47 FDB, 43 FWB Rated frequency
2 : (Heating) — Indoor : 70 FDB, 60 FWB, Outdoor : 17 FDB, 15 FWBMaximum frequency
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Test condition
3, |
4 |
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ARI |
Mode |
Test |
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Indoor air condition |
Outdoor air condition |
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Dry bulb (°F) |
Wet bulb (°F) |
Dry bulb (°F) |
Wet bulb (°F) |
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"A" Cooling Steady State |
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80 |
67 |
95 |
(75) |
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at rated compressor Speed |
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"B-2" Cooling Steady State |
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80 |
67 |
82 |
(65) |
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at rated compressor Speed |
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SEER |
"B-1" Cooling Steady State |
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80 |
67 |
82 |
(65) |
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(Cooling) |
at minimum compressor Speed |
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Low ambient Cooling Steady State |
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80 |
67 |
67 |
(53.5) |
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at minimum compressor Speed |
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Intermediate Cooling Steady State |
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80 |
67 |
87 |
(69) |
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at Intermediate compressor Speed |
5 |
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Standard Rating-Heating |
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70 |
60 |
47 |
43 |
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at rated compressor Speed |
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Low temperature Heating |
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70 |
60 |
17 |
15 |
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at rated compressor Speed |
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Max temperature Heating |
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70 |
60 |
62 |
56.5 |
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HSPF |
at minimum compressor Speed |
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(Heating) |
High temperature Heating |
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70 |
60 |
47 |
43 |
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at minimum compressor Speed |
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Frost Accumulation |
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70 |
60 |
35 |
33 |
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at rated compressor Speed |
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Frost Accumulation |
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70 |
60 |
35 |
33 |
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at Intermediate compressor Speed |
5 |
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5 : At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
OPERATING RANGE
(1) POWER SUPPLY
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Rated voltage |
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Guaranteed Voltage |
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208/230 V |
Min.187 V 208 V 230 V Max.253 V |
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Outdoor unit |
1 phase |
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60 Hz |
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(2) OPERATION
Mode |
Condition |
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Intake air temperature (°F) |
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lndoor |
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Outdoor |
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DB |
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WB |
DB |
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WB |
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Standard temperature |
80 |
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67 |
95 |
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Cooling |
Maximum temperature |
90 |
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73 |
115 |
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Minimum temperature |
67 |
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57 |
14 |
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— |
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Maximum humidity |
78 |
% |
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— |
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Heating |
Standard temperature |
70 |
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60 |
47 |
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43 |
Maximum temperature |
80 |
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67 |
75 |
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65 |
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Minimum temperature |
70 |
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60 |
14 |
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13 |
5
4 OUTLINES AND DIMENSIONS
MUZ-FD09NA MUZ-FD12NA
Unit: inch
REQUIRED SPACE
Basically open 4 inch or more
-3/4 |
15-3/4 |
Air in |
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1 |
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Air in
Air out
Drain hole |
1-5/8 |
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11/16 |
12 ~ 12-3/4 |
13-9/16 |
1-9/16 |
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2- 3/8 |
13/16 Oval hole |
4 |
in. |
or |
more |
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without any obstruction in front and on both sides of the unit.
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ormore |
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4 |
in |
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14 |
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more |
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in. |
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.or |
more |
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8 |
in |
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7/8 |
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29/32 |
11-1/4 |
17/32 |
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Open two sides of left, |
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handle |
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right, or rear side. |
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-5/8 |
1/32-11 |
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7/8-5 |
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21 |
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2 |
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Liquid pipe |
:1/4 (flared) |
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Gas pipe |
:3/8 (flared) |
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13/32 |
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11-29/32 |
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6-23/32 |
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5-15/16 |
19-11/16 |
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31-1/2 |
2-23/32 |
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6
5 WIRING DIAGRAM
MUZ-FD09NA MUZ-FD12NA
7
6 |
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REFRIGERANT SYSTEM DIAGRAM |
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MUZ-FD09NA |
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Unit:inch |
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MUZ-FD12NA |
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Refrigerant pipe ø3/8 |
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4-way valve |
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(with heat insulator) |
Muffler |
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Outdoor heat |
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exchanger |
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temperature |
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Stop valve |
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thermistor |
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(with service port) |
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Muffler |
Outdoor |
RT68 |
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Flared connection |
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Discharge |
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Service |
heat |
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temperature |
exchanger |
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thermistor |
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port |
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RT62 |
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Compressor |
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Ambient |
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Service |
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port |
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thermistor |
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Defrost |
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RT65 |
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thermistor |
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RT61 |
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Capillary tube |
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O.D. 0.118 × I.D. 0.071 |
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× 23-5/8 |
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(ø3.0 × ø1.8 × 600) |
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Strainer |
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Flared connection |
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Expansion |
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#100 |
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Stop valve |
valve |
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R.V. coil |
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(with strainer) |
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heating ON |
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Capillary tube |
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cooling OFF |
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Refrigerant pipe 1/4 |
O.D. 0.118 × I.D. 0.079 |
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× 9-7/16 |
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Refrigerant flow in cooling |
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(with heat insulator) |
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(ø3.0 × ø2.0 × 240) |
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Refrigerant flow in heating |
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MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE |
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Model |
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Refrigerant piping : ft |
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Piping size O.D : in |
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Max. Length |
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Max. Height difference |
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Gas |
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Liquid |
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A |
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B |
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MUZ-FD09NA |
65 |
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40 |
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3/8 |
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1/4 |
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MUZ-FD12NA |
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Indoor |
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unit |
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Max. Height difference B
Max. length A
Outdoor unit
ADDITIONAL REFRIGERANT CHARGE (R410A:oz.)
NOTE : Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model |
Outdoor unit precharged |
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Refrigerant piping length (one way) : ft |
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25 |
30 |
40 |
50 |
60 |
65 |
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MUZ-FD09NA |
2 lb. 9 oz. |
0 |
1.62 |
4.86 |
8.10 |
11.34 |
12.96 |
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MUZ-FD12NA |
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Calculation : X oz. = 1.62/ 5 oz./ ft x (Refrigerant piping length (ft) - 25) NOTE : Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
8
7 |
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DATA |
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MUZ-FD09NA MUZ-FD12NA |
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7-1. PERFORMANCE DATA |
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1) COOLING CAPACITY |
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Model |
Indoor air |
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Outdoor intake air DB temperature (˚F) |
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IWB |
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75 |
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85 |
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95 |
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105 |
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115 |
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(˚F) |
TC |
SHC |
TPC |
TC |
SHC |
TPC |
TC |
SHC |
TPC |
TC |
SHC |
TPC |
TC |
SHC |
TPC |
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MUZ-FD09NA |
71 |
11.0 |
6.9 |
0.58 |
10.3 |
6.5 |
0.63 |
9.7 |
6.1 |
0.68 |
9.0 |
5.6 |
0.72 |
8.3 |
5.2 |
0.75 |
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67 |
10.4 |
7.9 |
0.55 |
9.7 |
7.4 |
0.60 |
9.0 |
6.8 |
0.65 |
8.4 |
6.4 |
0.69 |
7.7 |
5.8 |
0.72 |
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63 |
9.8 |
8.8 |
0.52 |
9.1 |
8.1 |
0.58 |
8.5 |
7.6 |
0.62 |
7.7 |
6.9 |
0.66 |
7.0 |
6.3 |
0.69 |
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71 |
14.7 |
8.8 |
0.85 |
13.7 |
8.2 |
0.94 |
12.9 |
7.7 |
1.01 |
12.0 |
7.2 |
1.06 |
11.0 |
6.6 |
1.10 |
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MUZ-FD12NA |
67 |
13.9 |
10.2 |
0.81 |
13.0 |
9.5 |
0.89 |
12.0 |
8.8 |
0.96 |
11.2 |
8.1 |
1.02 |
10.3 |
7.5 |
1.07 |
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63 |
13.1 |
11.3 |
0.77 |
12.1 |
10.5 |
0.85 |
11.3 |
9.7 |
0.92 |
10.3 |
8.9 |
0.98 |
9.4 |
8.1 |
1.02 |
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NOTE : 1. IWB : Intake air wet-bulb temperature
TC : Total Capacity (x103 Btu/h)
SHC : Sensible Heat Capacity (x103 Btu/h)
TPC : Total Power Consumption (kW)
2.SHC is based on 80 ˚F of indoor Intake air DB temperature.
2)COOLING CAPACITY CORRECTIONS
Refrigerant piping length (one way : ft.)
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25 (std.) |
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40 |
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65 |
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MUZ-FD09NA |
1.0 |
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0.954 |
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0.878 |
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MUY-FD12NA |
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3) HEATING CAPACITY |
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Model |
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Indoor air |
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Outdoor intake air WB temperature (˚F) |
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IDB |
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15 |
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25 |
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35 |
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43 |
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45 |
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55 |
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(˚F) |
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TC |
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TPC |
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TC |
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TPC |
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TC |
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TPC |
TC |
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TPC |
TC |
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TPC |
TC |
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TPC |
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MUZ-FD09NA |
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75 |
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6.3 |
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0.56 |
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7.9 |
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0.66 |
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9.4 |
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0.73 |
10.6 |
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0.77 |
11.0 |
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0.78 |
12.4 |
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0.81 |
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70 |
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6.7 |
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0.54 |
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8.2 |
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0.64 |
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9.6 |
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0.71 |
10.9 |
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0.75 |
11.2 |
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0.77 |
12.7 |
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0.80 |
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65 |
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6.9 |
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0.52 |
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8.6 |
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0.62 |
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10.0 |
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0.69 |
11.2 |
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0.73 |
11.6 |
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0.74 |
13.0 |
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0.78 |
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MUZ-FD12NA |
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75 |
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7.9 |
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0.73 |
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9.9 |
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0.86 |
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11.8 |
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0.96 |
13.3 |
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1.00 |
13.7 |
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1.02 |
15.5 |
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1.06 |
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70 |
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8.4 |
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0.71 |
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10.2 |
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0.84 |
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12.0 |
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0.93 |
13.6 |
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0.98 |
14.0 |
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1.00 |
15.8 |
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1.04 |
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65 |
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8.6 |
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0.68 |
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10.7 |
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0.81 |
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12.4 |
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0.91 |
14.0 |
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0.96 |
14.4 |
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0.97 |
16.2 |
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1.02 |
NOTE : 1. IDB : Intake air dry-bulb temperature TC : Total Capacity (x103 Btu/h) TPC : Total Power Consumption (kW)
2. Above data is for heating operation without any frost.
How to operate with fixed operational frequency of the compressor.
1.Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL mode or EMERGENCY HEAT mode before starting to operate the air conditioner.
2.The compressor starts with operational frequency.
3.The fan speed of the indoor unit is High.
4.This operation continues for 30 minutes.
5.In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the remote controller.
9
7-2. PERFORMANCE CURVE
Cooling
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MUZ-FD09NA |
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MUZ-FD12NA |
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ure |
(°F) |
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SHF at rating condition |
= 0.76 |
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SHF at rating condition |
= 0.73 |
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Airflow = 307 CFM |
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e |
Airflow = 350 CFM |
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air |
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13 |
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15 |
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Indoor |
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WB |
temperat |
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Indoor |
intake |
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intak |
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capacity 3 Btu/h) |
12 |
air |
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capacity 3 Btu/h) |
14 |
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11 |
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WB |
temperature |
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13 |
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(°F) |
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10 |
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12 |
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9 |
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11 |
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71 |
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Total ( 10 |
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71 |
Total ( 10 |
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8 |
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10 |
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67 |
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67 |
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7 |
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9 |
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63 |
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63 |
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power consumption (kW) |
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temperature |
(°F) |
71 |
power consumption (kW) |
1.2 |
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ure |
(°F) |
71 |
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0.7 |
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1.1 |
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eairWB |
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67 |
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63 |
1.0 |
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air |
WBtemperat |
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67 |
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oorintak |
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intake |
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63 |
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0.6 |
Ind |
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0.9 |
oor |
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Ind |
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0.8 |
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0.5 |
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0.7 |
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Total |
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Total |
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65 |
75 |
85 |
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95 |
105 |
115 |
65 |
75 |
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85 |
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95 |
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105 |
115 |
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Outdoor intake air DB temperature (°F) |
Outdoor intake air DB temperature (°F) |
Heating |
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MUZ-FD09NA |
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Airflow = 381 CFM |
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65 70 75 |
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12 |
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(°F) |
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ure |
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capacityTotal |
capacityTotal Btu/h)10(3 |
10 |
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temperat |
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DB |
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air |
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8 |
intake |
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oor |
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Ind |
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consumptionpowerTotal |
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6 |
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powerTotalconsumption |
(kW) |
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ure |
(°F) |
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perat |
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75 |
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0.8 |
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airDB |
tem |
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70 |
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intake |
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65 |
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Indoor |
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0.6 |
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0.4 |
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15 |
25 |
35 |
45 |
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55 |
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Outdoor intake air WB temperature (°F)
MUZ-FD12NA
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Airflow = 420 CFM |
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20 |
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Btu/h)3 |
18 |
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14 |
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DB |
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(°F) |
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10 |
16 |
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temperature |
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12 |
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air |
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intake |
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( |
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Indoor |
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10 |
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8 |
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6 |
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(kW) |
1.1 |
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(°F) |
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air |
DB |
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perature |
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1.0 |
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tem |
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0.9 |
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intake |
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Indoor |
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0.8 |
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0.7 |
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0.6 |
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15 |
25 |
35 |
45 |
55 |
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Outdoor intake air WB temperature (°F) |
65
70
75
75
70
65
This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships between frequency and capacity.
10
7-3. CONDENSING PRESSURE Cooling
Data is based on the condition of indoor humidity 50 %. Air flow should be set to High speed.
MUZ-FD09NA
Condensing pressure
(PSIG) |
|
580 |
|
540 |
|
500 |
|
460 |
|
420 |
|
380 |
|
340 |
|
300 |
|
26068 70 |
75 |
) (°F DBtemperature
oor Ind
|
(PSIG) |
||
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180 |
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175 |
|
86 |
|
170 |
|
pressure |
165 |
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80 |
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75 |
160 |
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70 |
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155 |
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Suction |
150 |
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145 |
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140 |
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135 |
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130 |
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125 |
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120 |
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80 |
85 |
90 |
95 |
100 |
105(°F) |
68 70 |
75 |
Indoor DB temperature
80 85 90
(°F) |
86 |
|
80
75
70
95 100 105(°F)
Outdoor ambient temperature |
Outdoor ambient temperature |
MUZ-FD12NA
|
(PSIG) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
580 |
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
pressure |
540 |
|
|
|
|
|
|
|
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|
|
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|
|
|
|
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|
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|
|
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||
|
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|
|
|
|
|
|
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||
500 |
|
|
|
|
|
|
|
|
|
|
|
|
|
86 |
|
|
|
|
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|
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|
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|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
80 |
|
Condensing |
460 |
|
|
|
|
|
|
|
|
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|||
|
|
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|
|
|
|
|
|
|
|
|
|
|||
380 |
|
|
|
Indoor |
|
|
|
(°F) |
|
|
|
|
75 |
||
|
|
|
temperature |
|
|
|
|
|
|
70 |
|||||
|
420 |
|
|
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|||
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|||
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DB |
|
|
|
|
|
|
|
|
|
|
340 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
|
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|
|
|
|
|
|
|
|
|
|
|
300 |
|
|
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|
26068 70 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
75 |
80 |
85 |
90 |
95 |
100 |
105(°F) |
||||||||
|
|
|
|
Outdoor ambient temperature |
|
|
|
|
(PSIG) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
180 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
175 |
|
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|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
170 |
|
|
|
|
Indoor |
|
DB |
temperature |
|
(°F) |
|
|
|
|
|
||
165 |
|
|
|
|
|
|
|
|
|
|
|
86 |
|||||
|
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|
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|
|||
pressure150 |
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
80 |
160 |
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
155 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Suction |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
145 |
|
|
|
|
|
|
|
|
|
|
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|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
140 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
135 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
70 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
130 |
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
||
125 |
|
|
|
|
|
|
|
|
|
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|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
120 |
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
68 70 |
75 |
80 |
85 |
90 |
95 |
100 |
105(°F) |
||||||||||
|
|
|
|
Outdoor ambient temperature |
|
|
|
|
11