Behler-Young 38MHRC User manual

Specifications subject to change without notice.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS ....................................................... 1
INTRODUCTION............................................................................ 1
MODEL / SERIAL NUMBER NOMENCLATURES .................... 2
SPECIFICATIONS .......................................................................... 3
SYSTEM PERFORMANCE ........................................................... 5
DIMENSIONS ................................................................................. 6
CLEARANCES................................................................................ 14
ELECTRICAL DATA ..................................................................... 15
WIRING ........................................................................................... 15
CONNECTION DIAGRAMS ......................................................... 16
WIRING DIAGRAMS..................................................................... 17
REFRIGERATION CYCLE DIAGRAMS...................................... 24
SYSTEM EVACUATION AND CHARGING ............................... 31
ELECTRONIC FUNCTIONS ......................................................... 32
TROUBLESHOOTING ................................................................... 38
DIAGNOSIS AND SOLUTION...................................................... 46
DISASSEMBLY INSTRUCTIONS ................................................ 72
APPENDICES.................................................................................. 105
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install,
start-up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as
coil cleaning. All other operations should be performed by trained
service personnel.
When working on the equipment, observe precautions in the literature
and on tags, stickers, and labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep a
quenching cloth and fire extinguisher nearby when brazing. Use care
in handling, rigging, and setting bulky equipment.
Read this manual thoroughly and follow all warnings or cautions
included in the literature and attached to the unit. Consult local
building codes and National Electrical Code (NEC) for special
requirements. Recognize safety information. This is the safety-alert
symbol . When you see this symbol on the unit and in instructions
or manuals, be alert to the potential for personal injury.
Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards which
could result in personal injury or death.
CAUTION is used to identify unsafe practices which may result in
minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
INTRODUCTION
This service manual provides the necessary information to service,
repair, and maintain the outdoor units. This manual has an
“APPENDICES”on page 105 with data for troubleshooting. Use the
“TABLE OF CONTENTS”on page 1 to locate a desired topic.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing, modifying, or servicing system, the main
electrical disconnect switch must be in the OFF position.
There may be more than one disconnect switch. Lock out and
tag the switch with a suitable warning label.
WA R N I N G
EXPLOSION HAZARD
Failure to follow this warning could result
in death, serious personal injury, and/or
property damage. Never use air or gases
containing oxygen for leak testing or
operating refrigerant compressors.
Pressurized mixtures of air or gases
containing oxygen can lead to an explosion.
WA R N I N G
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.Do not bury more than 36 in. (914 mm)
of refrigerant pipe in the ground. If any section of pipe is
buried, there must be a 6 in. (152 mm) vertical rise to the valve
connections on the outdoor units.
If more than the recommended length is buried, refrigerant
may migrate to the cooler buried section during extended
periods of system shutdown. This causes refrigerant slugging
and could possibly damage the compressor at start-up.
CAUTION
Service Manual
38MHRC
Outdoor Unit Single Zone Ductless System
Sizes 09 to 36

38MHRCQ: Service Manual
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2
MODEL / SERIAL NUMBER NOMENCLATURES
Table 1 — Unit Sizes
SYSTEM TONS BTUh VOLTAGE - PHASE OUTDOOR MODEL
Heat Pump
0.75 9,000 115-1-60 38MHRCQ09AA1
1.00 12,000 38MHRCQ12AA1
0.75 9,000
208/230-1
38MHRCQ09AA3
1.00 12,000 38MHRCQ12AA3
1.50 18,000 38MHRCQ18AA3
2.00 24,000 38MHRCQ24AA3
2.5 30,000 38MHRCQ30AA3
3.00 36,000 38MHRCQ36AA3
OUTDOOR UNIT
38 MH R C Q 09 A A
38 = OUTDOOR UNIT
MH = MODEL
VOLTAGE
1 = 115-1-60
3 = 208/230-1-60
SYSTEM TYPE
R = OUTDOOR
MAXIMUM NUMBER OF FAN COIL UNITS THAT
CAN BE CONNECTED TO THE OUTDOOR UNIT
A = 1:1
SYSTEM TYPE
C =COOLING ONLY
Q= HEAT PUMP
NOMINAL CAPACITY
09 - 3/4 TON
12 - 1 TON
18 - 1-1/2 TONS
24 - 2 TONS
30 - 2 1/2 TONS
36 - 3 TONS
MAJOR SERIES
VARIATIONS
A= STANDARD
3
15 23 V 10001
Week of Manufacture
Year of Manufacture V= ALL MODELS
Sequential Serial Number
Use of the AHRI Certified
TM Mark indicates a
manufacturer’s
participation in the
program For verification
of certification for individual
products, go to
www.ahridirectory.org.

38MHRCQ: Service Manual
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3
SPECIFICATIONS
Table 2 — Specifications (Heat Pump)
NOTE: See the current compatibility chart for a list of the indoor unit and outdoor unit match ups.
SYSTEM SIZE 9K 12K 9K 12K 18K 24K 30K 36K
Electrical
Voltage, Phase,
Cycle V/Ph/Hz 115-1-60 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60
MCA A.2018.512.01515192528
MOCP - Fuse Rating A. 30 25 15 15 20 30 30 35
Max - Min
Voltage Range V 127~104 253-187
Operating
Range
Cooling Outdoor
DB Min - Max
° F (° C) 0~122 (-17~50)
Heating Outdoor
DB Min - Max
° F (° C) 0~86 (-17~30)
Piping
Total Piping Length ft (m) 82 (25) 82 (25) 82 (25) 82 (25) 98 (30) 164 (50) 164 (50) 213(65)
Piping Lift*ft (m) 32 (10) 32 (10) 32 (10) 32 (10) 65 (20) 82 (25) 82 (25) 98.4 (30)
Pipe Connection
Size - Liquid
in (mm) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 3/8 (9.52) 3/8 (9.52) 3/8 (9.52)
Pipe Connection
Size - Suction
in (mm) 3/8 (9.52) 1/2 (12.7) 3/8 (9.52) 1/2 (12.7) 1/2 (12.7) 5/8 (16) 5/8 (16) 5/8 (16)
Refrigerant
Type R410A
Charge lbs (kg) 1.59 (0.72) 1.79 (0.81) 1.59 (0.72) 1.79 (0.81) 2.98 (1.35) 3.92 (1.78) 6.17(2.8) 7.5(3.4)
Metering Device Capillary Tube Throttle Valve EEV + Throttle Valve
Outdoor
Coil
FaceArea Sq.Ft.4.044.044.044.044.675.908.148.14
No.Rows 111121.633
Fins per inch 18 20 18 20 20 20 18 18
Circuits 22224566
Compressor
Type Rotary Inverter
Model KSK103D33UEZ KSN98D64UFZ3 KSK103D33UEZ3 KSN98D64UFZ3 KSN140D21UFZ KTM240D43UKT KTF250D22UMT KTF250D22UMT
Oil Type VG74 VG74 VG74 VG74 VG74 VG74 VG74 VG74
Oil Charge Fl. Oz. 10.48 10.15 10.48 10.15 14.88 20.97 22.70 22.70
Rated Input Current
of the
Power Conversion
Equipment
A. 15 13.0 77.5 10 14.3 17 22
Outdoor
Unit Width in (mm) 30.12 (765) 30.12 (765) 30.12 (765) 30.12 (765) 31.69 (805) 35.04 (890) 37.24(946) 37.24(946)
Unit Height in (mm) 21.85 (555) 21.85 (555) 21.85 (555) 21.85 (555) 21.81 (554) 26.50(673) 31.89(810) 31.89(810)
Unit Depth in (mm) 11.93 (303) 11.93 (303) 11.93 (303) 11.93 (303) 12.99 (330) 13.46 (342) 16.14(410) 16.14(410)
Net Weight lbs (kg) 57.76 (26.2) 62.17 (28.2) 55.11 (25.0) 59.30 (26.9) 73.85 (33.5) 97.88 (44.4) 142.86(64.8) 150.13(68.1)
Airflow CFM 1,294 1,235 1,294 1,235 1,235 1,765 2,235 2,235
Sound Pressure dB(A) 55.0 53.5 55 55.5 55 59.5 70 71

38MHRCQ: Service Manual
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4
Table 3 — Specifications (Cooling Only)
* Permissible limits of the voltage range at which the unit operates satisfactorily.
SYSTEM SIZE 12 12 18 24
ELECTRICAL
Voltage, Phase, Cycle V/Ph/Hz 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60
MCA A. 19 9 19 19
Max-Min Voltage*V 127-104 253-187 253-187 253-187
OPERATING
RANGE
Cooling Outdoor DB Min - Max ° F (° C) 0~122 (-17~50) 0~122 (-17~50) 0~122 (-17~50) 0~122 (-17~50)
PIPING
Total Piping Length ft (m) 82 (25) 82 (25) 98 (30) 164 (50)
Piping Lift** ft (m) 33 (10) 33 (10) 66 (20) 66 (20)
Pipe Connection Size - Liquid in (mm) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 3/8 (9.52)
Pipe Connection Size - Suction in (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 5/8 (16)
REFRIGERANT
Type R410A
Charge lbs (kg) 1.43 (0.65) 1.43 (0.65) 1.98 (0.9) 3.92 (1.78)
Metering Device Capillary
OUTDOOR
COIL
FaceArea Sq.Ft.3.753.754.155.90
No. Rows 1 1 2 1.6
Fins per inch 21 21 21 20
Circuits 2 2 2 5
COMPRESSOR
Compressor Type Rotary Inverter
Model KSK103D33UEZ3 KSK103D33UEZ3 KSN140D58UFZ KTM240D43UKT
Oil Type VG74 VG74 VG74 VG74
Oil Charge Fl. Oz. 10.5 10.5 14.9 21.0
Rated Input Current of the Power
Conversion Equipment A. 14.3 14.3 11.0 14.3
OUTDOOR
Unit Width in (mm) 28.35 (720) 28.35 (720) 30.12 (765) 35.04 (890)
Unit Height in (mm) 19.49 (495) 19.49 (495) 21.85 (555) 26.50 (673)
Unit Depth in (mm) 10.63 (270) 10.63 (270) 11.93 (303) 13.46 (342)
Net Weight lbs (kg) 51.15 (23.2) 48.72 (22.1) 61.51 (27.9) 97.88 (44.4)
Airflow CFM 1,059 1,059 1,235 1,765
Sound Pressure dB(A) 52.0 52.5 55.5 59.5

38MHRCQ: Service Manual
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5
SYSTEM PERFORMANCE
Table 4 — Heat Pump
Table 5 — Cooling Only
INDOOR MODEL 9K
(115V)
12K
(115V)
09K
(208/230V)
12K
(208/230V)
18K
(208/230V)
24K
(208/230V)
30K
(208/230V)
36K
(208/230V)
Energy Star - NO NO NO NO NO NO NO NO
Cooling System Tons -0.75 1.0 0.75 1.0 1.5 2.0 2.5 3.0
Cooling Rated Capacity Btu/h 9,000 12,000 9,000 12,000 18,000 24,000 30,000 36,000
Cooling Capacity Range Btu/h 2,650~10,300 3,800~12,100 2,900~10,500 3,800~13,350 3,900~20,000 6,200~24,600 8,200~30,670 8,300~37,500
SEER - 21.5 20 21.5 20.5 19.5 18.5 21 18
EER -12.5 10.3 12.6 10.8 11 9.5 12.2 9.5
Heating Rated Capacity
(DOE H12 - 47°F) Btu/h 10,000 12,000 10,000 12,000 18,800 24,000 30,000 36,000
Heating Rated Capacity
(DOE H32 - 17°F) Btu/h 5,800 7,000 5,800 7,000 11,400 16,300 20,000 20,000
Heating Maximum
Capacity (17°F) Btu/h 7,800 9,000 7,500 9,000 12,500 14,800 21,100 25,000
Heating Maximum
Capacity (5°F) Btu/h 7,500 6,272 7,300 8,000 11,700 15,400 17,800 20,000
Heating Capacity Range Btu/h 2,700~10,500 2,730~12,500 2,400~10,500 2,730~13,900 6,300~19,400 6,800~26,800 11,800~30,800 10,900~37,360
HSPF -9.1 8.7 9.4 9.2 8.7 8.6 8.7 7.8
COP (DOE H12 - 47°F) W/W 3.26 3.05 3.24 3.38 3.05 2.99 2.75 2.78
COP (DOE H32 - 17°F) W/W 2.5 2.5 2.5 2.5 2.52 2.3 2.39 2.3
COP (5°F) W/W 2.15 1.68 2.2 1.8 2.05 1.76 1.8 1.76
NON-DUCTED HEAT PUMP SYSTEMS 12K (115 V) 12K (208/230 V) 18K (208/230 V) 24K (208/230 V)
Cooling Rated Capacity (DOE A2 - 95F) Btu/h 11,500 11,500 17,000 24,000
SEER Btu/h. W 20.5 20.5 19 17.1
EER (DOE A2 - 95F) Btu/h. W 11.2 11.2 10.9 9.3
Cooling Rated Capacity (DOE B2 - 82F) Btu/h 12,800 12,500 18,000 24,000
EER (DOE B2 - 82F) Btu/h. W 11.94 11.19 13 11
Cooling Capacity Range Btu/h 3,200-12,800 3,200-12,900 4,500-18,000 6,760-24,300

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
6
DIMENSIONS
Table 6 — Heat Pump
Table 7 — Cooling Only
SYSTEM SIZE 9K (115v) 12K (115V) 9K (208/230V) 12K (208/230V) 18K (208/230V) 24K (208/230V) 30K (208/230V) 36K (208/230V)
Height (H) in (mm) 21.85(555) 21.85(555) 21.85(555) 21.85(555) 21.81(554) 26.50(673) 31.89(810) 31.89(810)
Width (W) in (mm) 30.12(765) 30.12(765) 30.12(765) 30.12(765) 31.69(805) 35.04(890) 37.24(946) 37.24(946)
Depth (D) in (mm) 11.93(303) 11.93(303) 11.93(303) 11.93(303) 12.99(330) 13.46(342) 16.14(410) 16.14(410)
Weight - Net lbs. (kg) 57.76(26.2) 62.17(28.2) 55.11(25.0) 59.30(26.9) 73.85(33.5) 97.88(44.4) 142.86(64.8) 150.13(68.1)
PACKAGING
Height (H) in (mm) 24.02(610) 24.02(610) 24.02(610) 24.02(610) 24.21(615) 29.13(740) 34.84(885) 34.84(885)
Width (W) in (mm) 34.92(887) 34.92(887) 34.92(887) 34.92(887) 36.02(915) 39.17(995) 42.91(1090) 42.91(1090)
Depth (D) in (mm) 13.27(337) 13.27(337) 13.27(337) 13.27(337) 14.57(370) 15.67(398) 19.69(500) 19.69(500)
Weight - Gross lbs. (kg) 63.49(28.8) 67.68(30.7) 60.85(27.6) 64.82(29.4) 79.81(36.2) 104.50(47.4) 152.56(69.2) 158.95(72.1)
Carton Material CARTON BOX
Material Thickness in (mm) 0.197(5) 0.197(5) 0.197(5) 0.197(5) 0.197(5) 0.295(7.5) 0.295(7.5) 0.295(7.5)
SYSTEM SIZE 12K (115 V) 12K (208/230 V) 18K (208/230 V) 24K (208/230 V)
Height (H) in (mm) 19.49(495) 19.49(495) 21.85(555) 26.50(673)
Width (W) in (mm) 28.35(720) 28.35(720) 30.12(765) 35.04(890)
Depth (D) in (mm) 10.63(270) 10.63(270) 11.93(303) 13.46(342)
Weight - Net lbs. (kg) 51.15(23.2) 48.72(22.1) 61.51(27.9) 97.88(44.4)
PACKAGING
Height (H) in (mm) 21.26(540) 21.26(540) 24.02(610) 29.13(740)
Width (W) in (mm) 32.87(835) 32.87(835) 34.92(887) 39.17(995)
Depth (D) in (mm) 11.81(300) 11.81(300) 13.27(337) 15.67(398)
Weight - Gross lbs. (kg) 55.11(25) 52.1(23.9) 66.8(30.3) 104.50(47.4)
Carton Drawing No. -- 818*288*520 818*288*520 877*327*590 985*388*720
Carton Material -- CARTON BOX
Material Thickness in (mm) 0.197(5) 0.197(5) 0.197(5) 0.295(7.5)

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
DIMENSIONS (CONT)
Fig. 1 — Sizes 12K (115V) and 9K/12K (208/230V) Heat Pump and 18K Cooling Only
11.38 [286.5]
30.25 [769]
33 [837.5]
10.38 [262]
10.90 [278]
2.38 [59.75]
3.63 [93.15]
0.75 [17.5]
3.13 [78.75]
17.75 [452.5]
12.38 [313.75]
11.25 [285.75]
11 [280.5] 6.90 [175]
10.38 [262]
21.90 [556]

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
DIMENSIONS (CONT)
Fig. 2 — Sizes 12K (115V) and 12K (208/230V) Cooling Only
11.13 [281]
0.2 [5]
3.5 [87.5]
2.38 [59.5]
10.6 [261]
1 [24.5] 17.75 [452]
15.38 [392]
1.75 [44] 1.25 [30]
3 [75]
11 [281]
31.5 [800.5]
30 [760.4]
19.5 [494]
28.38 [719]

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
9
DIMENSIONS (CONT)
Fig. 3 — Size 18K Heat Pump
34.75 [883.6]
21.75 [554.5]
33.38 [847.1]
34.38 [798.8]
0.5 [11.4]
13.5 [346.3]
2.38 [60]
3.75 [95.7]
R0.2 [R5.0]
1 [26]
20 [511]
12.5 [317.2]
1.38 [32.7]
1.9 [49.4] 2 [49.5]
3.9 [98.2]
17.75 [449]
13.63 [346.3]

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
DIMENSIONS (CONT)
Fig. 4 — Size 24K Heat Pump
A
[334]
13.25
[894.72]
35.25
[663]
26
[890.60]
35
[71.52]
2.90
[337.56]
13.25
[73.50]
2.90
[122]
[6.026]
R0.24
[11]
.50
[672.79]
26.50
[379.59]
14.90
[346.67]
13.60
[106]
4.25
Detail A
Scale 2:1
4.75

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
11
DIMENSIONS (CONT)
Fig. 5 — Size 24K Cooling Only
A
[334]
13.25
[894.72]
35.25
[663]
26
[890.60]
35
[71.52]
2.90
[337.56]
13.25
[73.50]
2.90
[122]
[6.026]
R0.24
[11]
.50
[672.79]
26.50
[379.59]
14.90
[346.67]
13.60
[106]
4.25
Detail A
Scale 2:1
4.75

38MHRCQ: Service Manual
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12
DIMENSIONS (CONT)
Fig. 6 — Size 30K Heat Pump
31.90 [808.79]
16 [407]
2.25 [60]
4.25 [107.50]
37.25 [946.32]
40.60 [1033.64]
26.50 [673]
17.90 [454.80]
15.75 [400.44]
15.90 [402.60]
0.38 [10]
3.75 [95]

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
13
DIMENSIONS (CONT)
Fig. 7 — Size 36K Heat Pump
31.90 [808.79]
15.9 [405]
2.60 [59.96]
4.25 [107.51]
37.25 [946.32]
40.60 [1033.64]
26.50 [673]
17.90 [454.80]
15.75 [399.03] 16 [408.29]
0.38 [10]
3.75 [95]

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
14
CLEARANCES
Fig. 8 — Clearances
Table 8 — Clearances
NOTE: The outdoor unit must be mounted at least 2in (50mm) above the maximum anticipated snow depth.
NOTE: The inverter driven outdoor units cannot be stacked on top of one another.
Fig. 9 — Clearances for Multiple Units
UNIT MINIMUM VALUE IN. (MM)
A 24 (609)
B 24 (609)
C 24 (609)
D 4 (101)
E 6 (152)
A
DB
Air-outlet
Air-inlet
C
E
59in (150cm)
or more when
facing each other
Blowing into the air-inlet of other
condenser shall be avoided.
24in (60cm)
or more
59in (150cm)
or more on a
multiple parallel
unit arrangement
24in (61cm) or more on a single parallel unit arrangement
19in (48cm) or more on
a multiple parallel unit
arrangement 4in (10cm)
or more on a single
parallel unit arrangement
9.8in (25cm) or more for proper airflow
24in (61cm) or more is recommended
for service
9.8in (25cm) or more for
proper airflow 24in(61cm)
or more is
recommended
for service

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
15
ELECTRICAL DATA
Table 9 — Heat Pump
*Permissible limits of the voltage range at which the unit operates satisfactorily.
Table 10 — Cooling Only
WIRING
All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes. Use Electrical Data table
MCA (minimum circuit amps) and MOCP (maximum over current
protection) to correctly size the wires and the disconnect fuse or breakers
respectively.
Recommended Connection Method for Power and
Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied 14/3
power/communication wiring, from the outdoor unit to the indoor unit,
consists of four (4) wires and provides the power for the indoor unit. Two
wires are high voltage AC power, one is communication wiring and the
other is a ground wire. Wiring between indoor and outdoor unit is polarity
sensitive. The use of BX wire is NOT recommended.
If installed in a high Electromagnetic field (EMF) area and
communication issues exists, a 14/2 stranded shielded wire can be used to
replace L2 and (S) between outdoor unit and indoor unit landing the
shield onto ground in the outdoor unit only.
OUTDOOR UNIT 9K
(115V)
12K
(115V)
9K
(208/230V)
12K
(208/230V)
18K
(208/230V)
24K
(208/230V)
30K
(208/230V)
36K
(208/230V)
Minimum Circuit Ampacity (MCA) A 20 18.5 12.0 15 15 19 25 28
Recommended Breaker Size A20 20 15 15 20 20 30 30
Maximum Overcurrent Protection
Ampacity (MOPA) A3025151520303035
Voltage-Phase-Frequency 115-1-60 208/230-1-60
Min – Max Voltage Range* 104-127 187-253
COOLING
Running current (A) 6.3 10.5 3.41 5.2 711.12 12.1 18.5
Power consumption (W) 725 1,212 782 1,176 1,610 2,570 2,700 4,235
Power factor (%) 79.2 81.8 97.6 97.5 99.1 99.3 96.2 98.7
HEATING
Running current range (A) 7.82 10.4 4.1 5.0 7.2 10.25 12.2 18.3
Power consumption (W) 900 1,172 944 1,131 1,650 2,230 2,700 4,200
Power factor (%) 80.5 81.5 98 96.3 99.17 99.2 96.3 98.7
OUTDOOR UNIT 12K (115V) 12K (208/230V) 18K (208/230V) 24K (208/230V)
Minimum Circuit Ampacity (MCA) A 19 9 16 19
Recommended Breaker Size A20 10 20 20
Maximum Overcurrent
Protection Ampacity (MOPA) A30 15 20 30
Voltage-Phase-Frequency 115-1-60 208/230-1-60
Min – Max Voltage Range* 104-127 187-253
COOLING
Running current (A) 8.9 4.3 711.12
Power consumption (W) 1,020 891 1,600 2,570
Power factor (%) 98 82 99.2 99.3
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Wires should be sized based on NEC and local codes.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Be sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
Every wire must be connected firmly. Loose wiring may
cause the terminal to overheat or result in unit malfunction. A
fire hazard may also exist. Ensure all wiring is tightly
connected.
No wire should touch the refrigerant tubing, compressor or
any moving parts.
Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
Connecting cable with conduit shall be routed through the
hole in the conduit panel.
CAUTION

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
CONNECTION DIAGRAMS
Fig. 10 — Connection Diagram Sizes 9K-12K (115V)
Fig. 11 — Connection Diagram Sizes 9K-36K (208-230V)
NOTES:
1. Do not use thermostat wire for any connection between indoor and outdoor units.
2. All connections between the indoor and outdoor units must be made as shown in Figures 10 - 11. The connections are sensitive to polarity and will result
in a fault code.

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
17
WIRING DIAGRAMS
Fig. 12 — Wiring Diagram Sizes 9K and 12K (115V) - Heat Pump
Table 11 — Wiring Diagram Sizes 9K and 12K (115V) - Heat Pump
CN1A INPUT 115V AC
CN4_2/4_3 INPUT 115V AC
CN7 OUTPUT 0-155V AC
CN60 OUTPUT 115V AC
T3 Condenser TEMP. Sensor
CN21 INPUT 0-5V DCT4 Ambient TEMP. Sensor
TP Discharge TEMP. Sensor
CN15 OUTPUT 115V AC
CN17 OUTPUT 115V AC
CN50 OUTPUT 0-155V AC
This symbol indicates the element is optional.
The actual shape shall prevail.

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
18
WIRING DIAGRAMS (CONT)
Fig. 13 — Wiring Diagram Sizes 09-18K (208-230V) Heat Pump
Table 12 — Wiring Diagram Sizes 09-18K (208-230V) Heat Pump
CN1A INPUT 230V AC
CN7 OUTPUT 0-310V AC
CN60 OUTPUT 230V AC
T3 Condenser TEMP. Sensor
CN21 INPUT 0-5V DCT4 Ambient TEMP. Sensor
TP Discharge TEMP. Sensor
CN15 OUTPUT 230V AC
CN17 OUTPUT 230V AC
CN50 OUTPUT 0-310V AC
This symbol indicates the element is optional.
The actual shape shall prevail.
This symbol indicates the element exists
in various locations.

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
19
WIRING DIAGRAMS (CONT)
Fig. 14 — Wiring Diagram Size 24K (230V) - Heat Pump
Table 13 — Wiring Diagram Size 24K (230V) - Heat Pump
CN2/7/8 INPUT 230V AC
CN414 OUTPUT 0-310V AC
CN60 OUTPUT 230V AC
T3 Condenser TEMP. Sensor
CN17 INPUT 0-5V DCT4 Ambient TEMP. Sensor
TP Discharge TEMP. Sensor
CN16 OUTPUT 230V AC
CN19 OUTPUT 230V AC
CN27/28/29 OUTPUT 0-310V AC
This symbol indicates the element is optional.
The actual shape shall prevail.

38MHRCQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
20
WIRING DIAGRAMS (CONT)
Fig. 15 — Wiring Diagram Sizes 30K-36K (230V) - Heat Pump
Table 14 — Wiring Diagram Sizes 30K-36K (230V) - Heat Pump
CODE PART NAME
JXI Terminal Block
COMP_TOP Compressor OLP Temperature Sensor
EEV Electric Expansive Valve
FM1 Outdoor DC Fan
COMP Compressor
HEAT1,HEAT2 Crankcase Heating
CTI AC Current Detector
H-PRO High Pressure Switch
L-PRO Low Pressure Switch
SV 4-WAY VALVE
TP Exhaust Temperature Sensor
T3 Condenser Temperature Sensor
T4 Outdoor Ambient Temperature Sensor
TF Tube for Heatsink Temperature Sensor
V
U
W
EEV
BLACK
RED
BLUE
CN1 6
CN1 2
CN3 8
CN 8
CN2 0
CN2 1
CN2 7
M
SV WAY1
HE AT2
HE AT1
OPTION AL
BLACK
RED
BLUE
OPTIONAL
OPTION AL
CN 11
CN2 9CN3 2 CN4 2
CN2 6
CN3 6
BLACK
BLACK
RED
RED
BLUE
BLUEBLUE
CN3 0
CN 1
OPTIONAL:
TOPTEMPERATURE
N
O
I
T
C
E
T
O
R
POF
COMPRESSOR
COMP_TOP
CT1
OPTION AL
RED
WHITE
RED
RED
Y/G
OPTIOna l
NOTES:
This symbol indicates the element is optional.
The actual shape prevails.