Gree Multi+ Ultra MULTIU18HP230V1DO Guide

MULTI+ ULTRA SERIES
Change for life
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
MULTIU18HP230V1DO
MULTIU24HP230V1DO
MULTIU36HP230V1DO
MULTIU42HP230V1DO
Service & Parts Manual

Service Manual
Table of Contents
Table of Contents
Part Ⅰ: Technical Information.......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................2
2.1 Specication Sheet...........................................................................................................2
2.2 Cooling Capacity Tables...................................................................................................6
3. Outline Dimension Diagram......................................................................10
4. Refrigerant System Diagram....................................................................11
5. Electrical Part.........................................................................................................12
5.1 Wiring Diagram...............................................................................................................12
5.2 PCB Printed Diagram .....................................................................................................15
6. Function and Control......................................................................................17
Part Ⅱ: Installation and Maintenance .................................................19
7. Safety Precautions............................................................................................19
8. Installation Manual............................................................................................21
8.1 Preparation before Installation .......................................................................................22
8.2 Installation Instruction.....................................................................................................24
9. Troubleshooting ..................................................................................................29
9.1 Malfunction Indicator .....................................................................................................29
9.2 Malfunction Checking and Elimination ...........................................................................30
9.3 Maintenance Method for Normal Malfunction.................................................................36
10. Exploded View and Parts List ..............................................................38
11. Removal Procedure.......................................................................................44
Appendix:........................................................................................................................58
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................58
Appendix 2: Pipe Expanding Method ...................................................................................58
Appendix 3: List of Resistance for Temperature Sensor ......................................................60

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Outdoor Unit
No. Model Product Code
1MULTIU18HP230V1DO CB228W09400
2MULTIU24HP230V1DO CB228W09500
3MULTIU36HP230V1DO CB228W09600
4MULTIU42HP230V1DO CB228W09700
MULTIU18HP230V1DO
MULTIU24HP230V1DO
MULTIU36HP230V1DO
MULTIU42HP230V1DO

2Technical Information
Service Manual
2. Specications
Model MULTIU18HP230V1DO MULTIU24HP230V1DO
Product Code CB228W09400 CB228W09500
Power
supply
Rated Voltage V~ 208/230 208/230
Rated Frequency Hz 60 60
Phases 1 1
Cooling capacity Btu/h 18000 22000
Heating capacity Btu/h 21000 26000
Cooling Power Input W 1450 1760
Heating Power Input W 1710 2090
Cooling Current Input A 6.3 7.65
Heating Current Input A 7.4 9.1
Rated Power Input W 5000 6000
Rated Current A 22 26
EER (Btu/h)/W 12.5 12.5
COP (Btu/h)/W 12.3 12.5
SEER 23 23
HSPF 10.5 10.5
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR
CO.,LTD
ZHUHAI LANDA COMPRESSOR
CO.LTD
Compressor Model QXFW-D318zX035 QXFW-D318zX035
Compressor Refrigerant Oil Type FW68DA or equivalent FW68DA or equivalent
Compressor Type Inverter Rotary Inverter Rotary
L.R.A A / /
Compressor Rated Load Amp (RLA) A 14.9 17
Compressor Power Input W / /
Compressor Thermal Protector / /
Throttling Method Electron expansion valve Electron expansion valve
Cooling Operation Ambient
Temperature Range
OF 0~115 0~115
Heating Operation Ambient
Temperature Range
OF -31~75.2 -31~75.2
Condenser Material Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Condenser Pipe Diameter inch Φ5/16 Φ5/16
Rows-Fin Gap(mm) inch 2-1/16 2-1/16
Coil length (l) X height (H) X coil
width (L) inch 38 21/32X29 7/16X1 1/2 38 21/32X29 7/16X1 1/2
Fan Motor Speed (rpm) (H/M/L) rpm 880 880
Output of Fan Motor W 90 90
Fan Motor RLA A / /
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit CFM 2531 2531
Fan Type-Piece Axial-ow Axial-ow
Fan Diameter inch 21 43/64-2 39/64 Φ21 19/32-4 45/64
Defrosting Method Automatic Defrosting Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IPX4 IPX4
Permissible Excessive Operating
Pressure for the Discharge Side PSIG 550 550
Permissible Excessive Operating
Pressure for the Suction Side PSIG 240 240
Dimension (WXHXD) inch 39 31/64X31 7/64X16 13/32 39 31/64X31 7/64X16 13/32
Dimension of Package (LXWXH) inch 42 1/2X19X33 42 1/2X19X33
Dimension of Package(LXWXH) inch 42 43/64X19 13/64X33 43/64 42 43/64X19 13/64X33 43/64
Net Weight lb 172 174.2
Gross Weight lb 183 185.2
Refrigerant Charge R410A R410A
Refrigerant Charge oz 77.62 95.26
2.1 Specication Sheet

3
Technical Information
Service Manual
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor sq in 0.0051 0.0051
Recommended Power Cable(Core) N 3 3
Connection Pipe Connection Method - Flare Connection Flare Connection
Not Additional Gas Connection Pipe Length ft 65.6 98.4
Connection Pipe Gas Additional Charge oz/ft. 0.2 0.2
Outer Diameter of Liquid Pipe1(GREE Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe2(GREE Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe3(GREE Allocation)
(Metric) inch / 1/4
Outer Diameter of Liquid Pipe4(GREE Allocation)
(Metric) inch / /
Outer Diameter of Gas Pipe1(GREE Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe2(GREE Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe3(GREE Allocation)
(Metric) inch / 3/8
Outer Diameter of Gas Pipe4(GREE Allocation)
(Metric) inch / /
Connection Pipe Max. Height Distance(indoor and
indoor) ft 26.2 26.2
Connection Pipe Max. Height Distance(indoor and
outdoor and indoor up) ft 33 33
Connection Pipe Max. Height Distance(indoor and
outdoor and outdoor up) ft 33 33
Max. equivalent connection pipe length(outdoor to
last indoor) ft 82.0 82.0
Connection Pipe Max. Length Distance(total lenght) ft 164 229.6
The above data is subject to change without notice; please refer to the nameplate of the unit.

4Technical Information
Service Manual
Model MULTIU36HP230V1DO MULTIU42HP230V1DO
Product Code CB228W09600 CB228W09700
Power
supply
Rated Voltage V~ 208/230 208/230
Rated Frequency Hz 60 60
Phases 1 1
Cooling capacity Btu/h 36000 42000
Heating capacity Btu/h 36000 42000
Cooling Power Input W 4020 4660
Heating Power Input W 3300 3600
Cooling Current Input A 17.48 20.26
Heating Current Input A 14.35 15.65
Rated Power Input W 7360 7360
Rated Current A 32 32
EER (Btu/h)/W 9.0 9.0
COP (Btu/h)/W 10.96 11.66
SEER 23.0 23.0
HSPF 10.0 10.0
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR
CO.,LTD
ZHUHAI LANDA COMPRESSOR
CO.,LTD
Compressor Model QXAW-F518zX440C QXAW-F518zX440C
Compressor Refrigerant Oil Type FW68DA or equivalent FW68DA or equivalent
Compressor Type Inverter Rotary Inverter Rotary
L.R.A A / /
Compressor Rated Load Amp (RLA) A 27 28.5
Compressor Power Input W / /
Compressor Thermal Protector / /
Throttling Method Electron expansion valve Electron expansion valve
Cooling Operation Ambient Temperature
Range
OF 0~115 0~115
Heating Operation Ambient Temperature
Range
OF -31~75.2 -31~75.2
Condenser Material Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Condenser Pipe Diameter inch Φ5/16 Φ5/16
Rows-Fin Gap(mm) inch 3 3
Coil length (l) X height (H) X coil width (L) inch 35X41 37/64X2 1/4 35X41 37/64X2 1/4
Fan Motor Speed (rpm) (H/M/L) rpm 940 940
Output of Fan Motor W 90 90
Fan Motor RLA A / /
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit CFM / /
Fan Type-Piece Axial-ow Axial-ow
Fan Diameter-height inch Φ22 7/16—5 63/64 Φ22 7/16—5 63/64
Defrosting Method Automatic Defrosting Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IPX4 IPX4
Permissible Excessive Operating Pressure for
the Discharge Side PSIG 550 550
Permissible Excessive Operating Pressure for
the Suction Side PSIG 240 240
Dimension (W/H/D) inch 43 7/64X43 27/64X17 21/64 43 7/64X43 27/64X17 21/64
Dimension of Package (L/W/H) inch 46X18 57/64X43 57/64 46X18 57/64X43 57/64
Dimension of Package(L/W/H) inch 46 1/6X19X44 1/2 46 1/6X19X44 1/2
Net Weight lb 280 282.2
Gross Weight lb 297.7 299.9
Refrigerant Charge R410A R410A
Refrigerant Charge oz 158.73 176.37

5
Technical Information
Service Manual
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor sq in 0.013 0.013
Recommended Power Cable(Core) N 3 3
Connection Pipe Connection Method - Flare Connection Flare Connection
Not Additional Gas Connection Pipe Length ft 131.2 131.2
Connection Pipe Gas Additional Charge oz/ft. 0.2 0.2
Outer Diameter of Liquid Pipe1(GREE Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe2(GREE Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe3(GREE Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe4(GREE Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe4(GREE Allocation)
(Metric) inch / 1/4
Outer Diameter of Gas Pipe1(GREE Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe2(GREE Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe3(GREE Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe4(GREE Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe4(GREE Allocation)
(Metric) inch / 3/8
Connection Pipe Max. Height Distance(indoor and
indoor) ft 49.2 49.2
Connection Pipe Max. Height Distance(indoor and
outdoor and indoor up) ft 49.2 49.2
Connection Pipe Max. Height Distance(indoor and
outdoor and outdoor up) ft 49.2 49.2
Max. equivalent connection pipe length(outdoor to
last indoor) ft 82.0 82.0
Connection Pipe Max. Length Distance(total lenght) ft 246.1 262.5
The above data is subject to change without notice; please refer to the nameplate of the unit.

6Technical Information
Service Manual
Cooling
Heatling
2.2 Cooling Capacity Tables
MULTIU18HP230V1DO
Outdoor Ambient
Temperature (DB)
°F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC SHC TC SHC TC SHC
0°F 11182 8769 11822 9262 13018 10214
5°F 11573 9076 12235 9586 13473 10571
14°F 12122 9507 12806 10040 14453 11336
23°F 13281 10418 14206 11143 16277 12766
32°F 14113 11069 14909 11693 16826 13193
41°F 14620 11467 15440 12109 17644 13835
50°F 14875 11666 15910 12478 18230 14294
59°F 16106 12631 17227 13510 18867 14793
68°F 18240 14306 19380 15197 20710 16243
77°F 18025 14139 19171 15037 20520 16096
86°F 17138 13440 18278 14338 19950 15647
95°F 16220 12721 17353 13607 19000 14902
104°F 15434 12105 16562 12991 18506 14517
113°F 15035 11791 16169 12676 18113 14203
122°F 14643 11483 15770 12368 17721 13895
129°F 14250 11175 15200 11919 17100 13414
Outdoor Ambient
Temperature
(DB) °F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC Power Input
(KW) COP TC Power Input (KW) COP TC Power Input (KW) COP
-31°F 16500 4.80 1.01 16300 4.65 1.03 15900 4.63 1.01
-22°F 18902 4.89 1.13 18401 4.94 1.09 18030 4.95 1.07
-13°F 20698 4.96 1.22 20160 5.01 1.18 19762 5.02 1.15
-5°F 22479 3.28 2.01 21906 3.32 1.93 21482 3.43 1.84
0°F 22148 3.34 1.94 21565 3.38 1.87 21130 3.49 1.78
5°F 22251 3.17 2.06 21672 3.21 1.98 21245 3.31 1.88
10°F 22498 3.20 2.06 21913 3.24 1.98 21475 3.34 1.88
17°F 22072 3.18 2.03 21492 3.22 1.96 21053 3.32 1.86
19°F 21778 2.97 2.15 21478 3.01 2.09 21036 3.10 1.99
24°F 21108 3.08 2.01 20856 3.11 1.96 20478 3.21 1.87
32°F 20566 2.95 2.05 20339 2.98 2.00 20008 3.07 1.91
41°F 21375 2.73 2.30 21165 2.76 2.25 20848 2.84 2.15
43°F 21960 2.13 3.02 21750 2.16 2.96 21440 2.22 2.82
47°F 24000 2.18 3.23 23340 2.20 3.10 22846 2.27 2.94
53°F 24240 1.98 3.59 23573 2.00 3.45 23079 2.07 3.27
59°F 22316 2.00 3.27 21695 2.02 3.14 21236 2.09 2.98
64°F 22788 1.83 3.64 22160 1.85 3.50 21695 1.91 3.32
70°F 23220 1.86 3.66 22579 1.88 3.51 22100 1.94 3.33
75°F 23544 1.70 4.06 22896 1.72 3.90 22417 1.78 3.70
78°F 23760 1.72 4.06 23105 1.74 3.90 22619 1.79 3.70

7
Technical Information
Service Manual
Cooling
Heatling
MULTIU24HP230V1DO
Outdoor Ambient
Temperature (DB)
°F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC SHC TC SHC TC SHC
0°F 17067 13385 18044 14137 19870 15590
5°F 17664 13852 18674 14631 20564 16135
14°F 18502 14511 19546 15324 22059 17302
23°F 20271 15901 21682 17008 24843 19485
32°F 21541 16894 22756 17847 25682 20137
41°F 22315 17502 23566 18482 26931 21116
50°F 22704 17806 24284 19045 27825 21817
59°F 24582 19279 26293 20621 28797 22579
68°F 27840 21835 29580 23196 31610 24792
77°F 27511 21580 29261 22951 31320 24567
86°F 26158 20513 27898 21884 30450 23882
95°F 24756 19417 26487 20768 29000 22746
104°F 23558 18477 25278 19828 28246 22158
113°F 22949 17997 24679 19348 27647 21678
122°F 22349 17527 24070 18878 27047 21208
129°F 21750 17057 23200 18193 26100 20474
Outdoor Ambient
Temperature
(DB) °F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC Power Input
(KW) COP TC Power Input (KW) COP TC Power Input (KW) COP
-31°F 21500 5.45 1.16 21000 5.50 1.12 20500 5.70 1.05
-22°F 24954 5.50 1.33 24292 5.57 1.28 23801 5.74 1.21
-13°F 27324 5.58 1.44 26614 5.64 1.38 26089 5.82 1.31
-5°F 31846 5.42 1.72 31034 5.48 1.66 30433 5.66 1.58
0°F 31376 5.51 1.67 30550 5.58 1.61 29933 5.75 1.52
5°F 31523 5.24 1.76 30703 5.30 1.70 30097 5.46 1.61
10°F 31872 5.29 1.77 31044 5.35 1.70 30423 5.52 1.62
17°F 31268 5.25 1.75 30448 5.31 1.68 29825 5.48 1.60
19°F 30852 4.91 1.84 30427 4.96 1.80 29802 5.12 1.71
24°F 29903 5.08 1.72 29546 5.14 1.68 29011 5.30 1.60
32°F 29135 4.86 1.76 28814 4.92 1.72 28344 5.07 1.64
41°F 30281 4.50 1.97 29984 4.55 1.93 29535 4.69 1.84
43°F 31110 3.52 2.59 30813 3.56 2.54 30373 3.67 2.42
47°F 34000 3.60 2.77 33065 3.64 2.66 32366 3.76 2.52
53°F 34340 3.27 3.08 33394 3.31 2.96 32695 3.41 2.81
59°F 31614 3.30 2.81 30734 3.34 2.70 30085 3.45 2.56
64°F 32283 3.03 3.12 31394 3.06 3.00 30734 3.16 2.85
70°F 32895 3.08 3.13 31987 3.11 3.01 31308 3.21 2.86
75°F 33354 2.81 3.48 32436 2.84 3.34 31757 2.93 3.17
78°F 33660 2.84 3.48 32732 2.87 3.34 32044 2.96 3.17

8Technical Information
Service Manual
Cooling
Heatling
MULTIU36HP230V1DO
Outdoor Ambient
Temperature (DB)
°F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC SHC TC SHC TC SHC
0°F 21827 16500 22800 18000 24000 19500
5°F 21927 17196 23181 18162 25527 20029
14°F 22968 18014 24264 19023 27384 21478
23°F 25164 19740 26916 21113 30840 24188
32°F 25758 45964 27663 49363 31994 57088
41°F 23613 65750 25520 71058 29746 82822
50°F 21549 81552 23437 88695 27533 104195
59°F 30516 23933 32640 25598 35748 28029
68°F 34560 27106 36720 28795 39240 30776
77°F 34152 26790 36324 28491 38880 30497
86°F 32472 25465 34632 27166 37800 29646
95°F 30732 24103 32880 25781 36000 28236
104°F 29244 22936 31380 24614 35064 27507
113°F 27744 21757 29880 23435 33576 26328
Outdoor Ambient
Temperature
(DB) °F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC Power Input
(KW) COP TC Power Input (KW) COP TC Power Input (KW) COP
-31°F 23000 5.50 1.23 24000 5.72 1.23 24500 5.85 1.23
-22°F 25563 5.57 1.34 25910 5.73 1.33 24899 5.91 1.24
-13°F 28859 5.65 1.50 28373 5.81 1.43 27293 5.99 1.33
-5°F 33638 5.64 1.75 33072 5.79 1.67 31837 5.98 1.56
0°F 36089 5.73 1.85 35488 5.89 1.77 34105 6.08 1.64
5°F 36259 5.70 1.86 35648 5.86 1.78 34291 6.05 1.66
10°F 39753 5.76 2.02 39091 5.92 1.94 37581 6.11 1.80
17°F 41794 5.72 2.14 41097 5.88 2.05 39475 6.06 1.91
19°F 41758 5.50 2.23 41075 5.65 2.13 39443 5.83 1.98
24°F 40398 5.42 2.18 39787 5.58 2.09 38397 5.75 1.96
32°F 39260 5.19 2.22 38728 5.33 2.13 37514 5.50 2.00
41°F 40725 5.11 2.33 40247 5.26 2.24 39090 5.42 2.11
43°F 41822 5.10 2.40 41330 5.24 2.31 40199 5.41 2.18
47°F 45450 5.22 2.55 44663 5.36 2.44 42837 5.53 2.27
53°F 45900 4.74 2.84 45098 4.87 2.71 43272 5.03 2.52
59°F 42259 4.78 2.59 41513 4.92 2.47 39818 5.07 2.30
64°F 43158 4.39 2.88 42398 4.51 2.75 40678 4.65 2.56
70°F 43968 4.46 2.89 43208 4.58 2.76 41437 4.73 2.57
75°F 44588 4.07 3.21 43803 4.19 3.07 42031 4.32 2.85
78°F 44993 4.11 3.21 44208 4.22 3.07 42411 4.36 2.85

9
Technical Information
Service Manual
Outdoor Ambient
Temperature (DB)
°F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC SHC TC SHC TC SHC
0°F 24000 19500 26000 20500 28900 22300
5°F 25582 20062 27045 21189 29782 23368
14°F 26796 21016 28308 22193 31948 25057
23°F 29358 23030 31402 24632 35980 28220
32°F 30051 53625 32274 57590 37327 66603
41°F 27549 76709 29773 82901 34704 96626
50°F 25141 95143 27343 103477 32122 121561
59°F 35602 27922 38080 29865 41706 32701
68°F 40320 31623 42840 33594 45780 35906
77°F 39844 31254 42378 33240 45360 35580
86°F 37884 29709 40404 31694 44100 34587
95°F 35854 28121 38360 30078 42000 32942
104°F 34118 26759 36610 28716 40908 32091
113°F 32368 25384 34860 27341 39172 30716
MULTIU42HP230V1DO Cooling
Heatling
Outdoor Ambient
Temperature
(DB) °F
Indoor Entering Air Temperatures
68F DB 73°F DB 80°F DB
57F WB 61°FWB 67°FWB
TC Power Input
(KW) COP TC Power Input (KW) COP TC Power Input (KW) COP
-31°F 27000 5.50 1.44 28000 5.70 1.44 26000 5.85 1.30
-22°F 28744 5.57 1.51 29134 5.73 1.49 27998 5.91 1.39
-13°F 32450 5.65 1.68 31904 5.81 1.61 30689 5.99 1.50
-5°F 37824 5.64 1.97 37188 5.79 1.88 35799 5.98 1.76
0°F 40580 5.73 2.08 39905 5.89 1.99 38349 6.08 1.85
5°F 40771 5.70 2.10 40085 5.86 2.00 38558 6.05 1.87
10°F 44700 5.76 2.27 43955 5.92 2.18 42258 6.11 2.03
17°F 42723 5.72 2.19 42011 5.88 2.10 40352 6.06 1.95
19°F 42686 5.50 2.28 41988 5.65 2.18 40320 5.83 2.03
24°F 41296 5.42 2.23 40671 5.58 2.14 39250 5.75 2.00
32°F 40132 5.19 2.27 39589 5.33 2.18 38348 5.50 2.04
41°F 41630 5.11 2.39 41141 5.26 2.29 39959 5.42 2.16
43°F 42751 5.10 2.46 42248 5.24 2.36 41093 5.41 2.23
47°F 46460 5.22 2.61 45655 5.36 2.50 43789 5.53 2.32
53°F 46920 4.74 2.90 46101 4.87 2.77 44234 5.03 2.58
59°F 43198 4.78 2.65 42435 4.92 2.53 40703 5.07 2.35
64°F 44117 4.39 2.95 43341 4.51 2.82 41582 4.65 2.62
70°F 44945 4.46 2.96 44169 4.58 2.83 42358 4.73 2.63
75°F 45579 4.07 3.28 44777 4.19 3.14 42965 4.32 2.92
78°F 45993 4.11 3.28 45191 4.22 3.14 43353 4.36 2.92

10 Technical Information
Service Manual
MULTIU36HP230V1DO MULTIU42HP230V1DO
Unit:inch
40
43 7/64
24 13/16
14 1/4
17 21/64
43 27/64
14 51/64
Unit:inc
h
39 31/64
36 7/32
16 13/32
14 37/64
31 7/64
24
15 23/32
3. Outline Dimension Diagram
MULTIU18HP230V1DO MULTIU24HP230V1DO

11
Technical Information
Service Manual
4. Refrigerant System Diagram
Schematic Diagram of Free Match Series Inverter Heat Pump System:
Electronic
expansion
valve A
Flash vaporizer
Unloading valve
Outdoor evaporator
4-way valve
Solenoid valve
(high pressure)
Solenoid valve
(low pressure)
Air injection
Compressor
Variable
volume
Gas-liquid
separator
Gas-liquid
separator
COOLING
HEATING
Heat Exchanger
Heat Exchanger
Heat Exchanger Heat Exchanger
Heat Exchanger
Indoor Uint
Electronic Expansion Valve
Outdoor Uin

12 Technical Information
Service Manual
5. Electrical Part
5.1 Wiring Diagram
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN GREEN COMP Compressor
YE Yellow BN Brown Grouding wire
RD Red BU Blue
YEGN Yellow/Green BK Black
VT Violet OG Orange
● Outdoor Unit
●Instruction
MULTIU18HP230V1DO
60000706049101
0
*
2)$1
<(*1
*
02725
/
/
/
/
*
32:(5
7(036(1625
7(036(1625
7(036(1625
(;+$867
2875220
28778%(
&203
6(16256(1625
7(03
%.
5'
<(
%8
5'
<(
%8
%.
%. 5'5'%.
:+
*<
%.
%1%8
7(50,1$/
7(50,1$/%/2&.

1


;7%
1
;7$

/
/
;7
4$ <%4% <$
78%(%
57
57
57 57
78%($
&20,11(5
$&1
57
57
;
:5' :
9
/
8%8
9<(
8
57
76(1625
%8
)$
)%
(.9 

(.9
(/(&7521,&
(;3$16,21
9$/9($
*
*
%/2&.
%/2&.
7(50,1$/
9$/9(%
(;3$16,21
(/(&7521,&
; ;
<(*1
)$1
*$6
3,3(
7(03
3,3(
/,48,' /,48,'
3,3(
7(03
3,3(
*$6
7(03
6(1625 6(1625
+($7%
5' 5'
$&1
$&/
1
(3(
1
$&/
$3
$&/
*
<(*1
%1
%8
%1
%8
%8 %1
0DLQ%RDUG
/
/
:+%8
%.
5'%1
*1<(*1
:+%8
%.
5'%1
*1<(*1
5' +($7&
5'
%$1'+($7(5
&2035(6625 (+
35(6685(
6:,7&+
+,*+
:+
:+
+33
3
<9
%8
%8
<9
%8
%8
<9
%8
%8
:$< <9 9$/9(
:$<
97
97
(+
+($7(5
%$1'
%27720
)

(.9
(/(&7521,&
(;3$16,21
9$/9(
7(036(1625
68&7,21
%.
57
6(1625
.
:+ .
.
.
0$*1(7,&
5,1*
0$*1(7,&
5,1*
0$*1(7,&
5,1*
:+%8
%.%1
*1<(*1
:$51,1*
$30$,1%2$5'
3OHDVHGRQWWRXFKDQ\WHUPLQDO
ZKHQWKHYROWDJHRIWHUPLQDO
3'&DQG1'&DW$3LV
KLJKHUWKDQ9WRSUHYHQWWKH
ULVNRIHOHFWULFDOVKRFN






,1'22581,7$,1'22581,7%
LURQVKHOOPRWRU
RQO\DSSOLHVWRWKH
127(0RWRUJURXQG
:$<
9$/9(
0$.(83
&1
EOXH
&1
UHG
&1
JUHHQ
35(6685(
:$<9$/9(
/2:
35(6685(
:$<9$/9(
+,*+
EODFN
ZKLWH
JUHHQ

&203
+36

13
Technical Information
Service Manual
MULTIU24HP230V1DO
600007060491
0
*
2)$1
<(*1
*
02725
/
/
/
/
*
32:(5
7(036(1625
7(036(1625
7(036(1625
(;+$867
2875220
28778%(
&203
6(16256(1625
7(03
%.
5'
<(
%8
5'
<(
%8
5'%.
5'
%.
%. 5'5'%.
:+
:+
*<
%.
%1
%8
%1
%8
7(50,1$/
7(50,1$/%/2&.
1

1


;7%
1
;7$

/
/
;7
4$ <&4&<%4% <$
57 57
78%(&78%(%
57
57
57 57
78%($
&20,11(5
$&1
57
57
;
:5' :
9
/
8%8
9<(
8
57
76(1625


;7&
%8
)$
)%
)&
(.9 

(.9

(.9
(/(&7521,&
(;3$16,21
9$/9($
*
*
*
%/2&.
%/2&.
7(50,1$/
%/2&.
7(50,1$/
9$/9(%
(;3$16,21
(/(&7521,&
(/(&7521,&
(;3$16,21
9$/9(&
; ; ;
<(*1
)$1
*$6
3,3(
7(03
3,3(
/,48,' /,48,'
3,3(
7(03
3,3(
*$6
7(03
6(1625 6(1625 6(16256(1625
7(03
*$6
3,3(
7(03
3,3(
/,48,'
+($7%
5' 5'
$&1
$&/
1
(3(
1
$&/
$3
$&/
*
<(*1
%1
%8
%1
%8
%8 %1
0DLQ%RDUG
/
/
/
:+%8
%.
5'%1
*1<(*1
:+%8
%.
5'%1
*1<(*1
:+%8
%.
5'%1
*1<(*1
5' +($7&
5'
%$1'+($7(5
&2035(6625 (+
35(6685(
6:,7&+
+,*+
:+
:+
+33
3
<9
%8
%8
<9
%8
%8
<9
%8
%8
:$< <9 9$/9(
:$<
97
97
(+
+($7(5
%$1'
%27720
)

(.9
(/(&7521,&
(;3$16,21
9$/9(
7(036(1625
68&7,21
%.
57
6(1625
.
:+ .
.
.
0$*1(7,&
5,1*
0$*1(7,&
5,1*
0$*1(7,&
5,1*
0$*1(7,&
5,1*
:+%8
%.%1
*1<(*1
:$51,1*
$30$,1%2$5'
3OHDVHGRQWWRXFKDQ\WHUPLQDO
ZKHQWKHYROWDJHRIWHUPLQDO
3'&DQG1'&DW$3LV
KLJKHUWKDQ9WRSUHYHQWWKH
ULVNRIHOHFWULFDOVKRFN







,1'22581,7$,1'22581,7%,1'22581,7&
LURQVKHOOPRWRU
RQO\DSSOLHVWRWKH
127(0RWRUJURXQG
:$<
9$/9(
0$.(83
&1
EOXH
&1
UHG
&1
JUHHQ
35(6685(
:$<9$/9(
/2:
35(6685(
:$<9$/9(
+,*+
EODFN
ZKLWH
UHG
JUHHQ

&203
+36
60000706063001
MULTIU36HP230V1DO
$&1
(3(
$&1
$&/ $3 $&/ %1
0DLQ%RDUG %8
*
<(*1 $&1 %8
θ
.
θ
.
θ
.
θ
θ
.
θ
.
θ
.
θ
θ
.
θθ
/
/
%.%1
:+%8
*1<(*1
7(50,1$/
%/2&.
,1'22581,7$
1


*1<(*1
5'%1
:+%8
%.
*
;7$
1


1


,1'22581,7&
*1<(*1
5'%1
%.
:+%8
%.
5'%1
*1<(*1 ;7%
*
*
;7&
*
%.
5'%1
*1<(*1
,1'22581,7'
:+%8
;7'


1
,1'22581,7%
:+%8
/
/
LURQVKHOOPRWRU
RQO\DSSOLHVWRWKH
1RWH0RWRUJURXQG
(+
θ
(+
+33
1
$&/
76(1625
$30DLQ%RDUG
0
2)$1
:$<
)'
)&
)%
)$
&20,11(5
)
&1
&1
&1
6(1625
EOXH
UHG
JUHHQ





1
\HOORZ
UHG
EODFN
ZKLWH
UHG
32:(5
.
&1
5757$ 57% 57& 57'
&1
.
57$ 57% 57& 57'
.
5757
.
*
;7
%8%1
%8
%8
+36 3
%1
%1
%8
%1
7(50,1$/%/2&.
7(50,1$/%/2&.
7(50,1$/%/2&.
28778%(
7(50,1$/%/2&.
7(03
6(1625
2875220
7(03
6(1625
(;+$867
7(03
6(1625
/,48,'3,3(
7(03
6(1625
3(
3(
*$63,3(
7(03
6(1625
%8%1
:+
<(
%.
5'
(.9
.
68&7,21
7(03
6(1625
57
(.9
(.9
(.9
(.9
6:,7&+
+,*+35(6685(
/
/ &203
5'
<(
%8
:
9
/ 8
&203
:5'
8%8
9<(
)$102725
<(*1
<9 :$<9$/9(
97
97
&2035(6625
5'
5'
+($7& %$1'+($7(5
(/(&7521,&
(;3$16,21
9$/9($
(/(&7521,&
(;3$16,21
9$/9(%
(/(&7521,&
(;3$16,21
9$/9(&
(/(&7521,&
(;3$16,21
9$/9('
(/(&7521,&
(;3$16,21
9$/9(
<9 +,*+35(6685(
%8
%8
<9 /2:35(6685(
%8
%8
<9 0$.(83:$<
%8
%8
%27720
5'
5'
+($7% %$1'+($7(5
:$<9$/9(
:$<9$/9(
9$/9(
:+
:+
0$*1(7,&
5,1*

14 Technical Information
Service Manual
600007060630
MULTIU42HP230V1DO
$&1
(3(
$&1
$&/ $3 $&/ %1
0DLQ%RDUG %8
*
<(*1 $&1 %8
θ
.
θ
.
θ
.
θ
θ
.
θ
.
θ
.
θ
θ
.
θθ
/
/
%.%1
:+%8
*1<(*1
7(50,1$/
%/2&.
,1'22581,7$
1


*1<(*1
5'%1
:+%8
%.
*
;7$
1


1


,1'22581,7&
*1<(*1
5'%1
%.
:+%8
%.
5'%1
*1<(*1 ;7%
*
*
;7&
*
%.
5'%1
*1<(*1
,1'22581,7'
:+%8
;7'


1
,1'22581,7%
:+%8
/
/
LURQVKHOOPRWRU
RQO\DSSOLHVWRWKH
1RWH0RWRUJURXQG
*
%.
5'%1
*1<(*1
,1'22581,7(
:+%8
;7(


1
θθ
(+
θ
(+
+33
1
$&/
76(1625
$30DLQ%RDUG
0
2)$1
:$<
)'
)&
)%
)$
)(
&20,11(5
)
&1
&1
&1
6(1625
EOXH
UHG
JUHHQ






1
JUHHQ
\HOORZ
UHG
EODFN
ZKLWH
UHG
32:(5
.
&1
57 57$ 57% 57& 57'
&1
.
57$ 57% 57& 57'
.
5757
.
*
;7
%8 %1
%8
%8
+36 3
%1
%1
%8
%1
7(50,1$/%/2&.
7(50,1$/%/2&.
7(50,1$/%/2&.
28778%(
7(50,1$/%/2&.
7(03
6(1625
2875220
7(03
6(1625
(;+$867
7(03
6(1625
/,48,'3,3(
7(03
6(1625
3(
*$63,3(
7(03
6(1625
3(
7(50,1$/%/2&.
57(
.
57(
.
%8 %1
%8 %1
:+
<(
%.
5'
2* (.9
.
68&7,21
7(03
6(1625
57
(.9
(.9
(.9
(.9
(.9
6:,7&+
+,*+35(6685(
/
/
&203
5'
<(
%8
:
9
/ 8
&203
:5'
8%8
9<(
)$102725
<(*1
<9 :$<9$/9(
97
97
&2035(6625
5'
5'
+($7& %$1'+($7(5
(/(&7521,&
(;3$16,21
9$/9($
(/(&7521,&
(;3$16,21
9$/9(%
(/(&7521,&
(;3$16,21
9$/9(&
(/(&7521,&
(;3$16,21
9$/9('
(/(&7521,&
(;3$16,21
9$/9((
(/(&7521,&
(;3$16,21
9$/9(
<9 +,*+35(6685(
%8
%8
<9 /2:35(6685(
%8
%8
<9 0$.(83:$<
%8
%8
%27720
5'
5'
+($7% %$1'+($7(5
:$<9$/9(
:$<9$/9(
9$/9(
:+
:+
0$*1(7,&
5,1*
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.

15
Technical Information
Service Manual
● TOP VIEW
● BOTTOM VIEW
1Compressor three phase input
interface
2Terminal of system low
pressure protection
3Terminal of system high
pressure protection
4Overload interface of
compressor
5Interface of Inhalation
temperature package
6Interface of temperature
sensor
7Terminal of electronic
expansion valve
8Interface of fan
9Interface of electric heating for
chassis
10 Interface of electric heating for
compressor
11 Terminal of low pressure
2-way valve
12 Terminal of 2-way valve
13 Terminal of 4-way valve
14 Terminal of high pressure
2-way valve
15 Terminal of communication
wire
16 Terminal of neutral wire
17 Terminal of live wire
18 Terminal of neutral wire
5.2 PCB Printed Diagram
MULTIU18HP230V1DO
MULTIU24HP230V1DO
1234 56 78910111213
14
15
16
18
17

16 Technical Information
Service Manual
● TOP VIEW
● BOTTOM VIEW
1Compressor three phase input
interface
2Terminal of system low
pressure protection
3Terminal of system high
pressure protection
4Overload interface of
compressor
5Interface of temperature
sensor
6Air valve temperature package
7Liquid valve temperature
package
8Terminal of electronic
expansion valve
9Inhalation temperature
package
10 Terminal of 4-way valve
11 Terminal of 2-way valve
12 Terminal of low pressure
2-way valve
13 Terminal of high pressure
2-way valve
14 Terminal of electric heating for
chassis
15 Terminal of electric heating for
compressor
16 Communication interface
17 Interface of netural wire
18 Live wire interface
19 Neutral wire interface
20 DC fan interface
MULTIU36HP230V1DO MULTIU42HP230V1DO
1234 5678
9
10
11
12
13
14
15
16
17181920

17
Technical Information
Service Manual
6. Function and Control
1.Function Control
1) Cooling mode
a. Turning on the unit for cooling operation, and if any one of the indoor units satisfy the cooling operation condition, the system will start
for cooling operation; and the electronic expansion valve, the outdoor fan and the compressor start operation.
b. When some of the indoor units satisfy the stop-condition while some indoor units does not satisfy the stop-condition, the compressor
does not stop, the compressor adjust the frequency according to demand. For the indoor unit with stop-condition satisfies, the
corresponding electronic expansion valve will be closed.
c. Change Cooling mode to heating mode
When change the unit to heating mode from cooling mode, the whole system will stop rst. Then the system will restart in heating mode
after the compressor stops.
d. 4-way valve
In this mode, the 4-way valve is closed.
e. Outdoor fan control in cooling mode
The outdoor fan starts before 5s of the starting of compressor. The outdoor fan will run in high speed after starting and then it will run in
set speed.
2) Dry mode (dehumidication mode)
This mode is the same as cooling mode;
3) Heating mode
a. Turning on the unit for heating operation, If any one of the indoor unit satisfy the heating condition, the system will start to run in heating
mode
b. If all the indoor units satisfy the stop-condition, the compressor stops and the outdoor fan stops after 1min;
c. If only part of the indoor units satisfy the stop-condition, the compressor decrease the frequency immediately and operates according to
demand.
d. Change Heating mode to cooling mode or dehumidication mode, the whole system will stop rst, then restart under the required mode.
e. Defrosting function
When the defrosting condition is satised, the 4-way valve reverses the direction, the outdoor fan stop. After the 4-way valve reverses the
direction, the frequency of compressor rises, and the unit will start defrosting under cooling cycle.
f. Oil-return control in heating mode
a)If the whole system runs in low frequency for a long time, the system will run a oil-return operation in high frequency, the oil-return
operation will runs for 60 second.
4) Fan mode
Only indoor fan run. Compressor, outdoor fan and 4-way valve are closed .
2.Protection Function
1) Mode conict protection of indoor units
When the setting mode is different of different indoor unit, the unit runs in below status:
a. The system mode is determined by the rst turning on indoor unit except indoor unit is in fan mode. Cooling mode (dry mode) is in
conict with heating mode.
b. If the rst turning on unit is fan mode, and the second turning on unit is cooling or heating mode, then the system will run in cooling or
heating mode.
2) Overload protection
If the tube temperature at the high pressure side is higher than normal, the compressor frequency is restricted or decreased to normal
operation frequency.

18 Technical Information
Service Manual
3) High exhaust temperature protection
If the exhaust temperature is higher than protection value, the compressor stops running.
If the exhaust temperature protection continuously appears for 6 times, the compressor can’t resume running. In this case, only by cutting off
the power and then reenergize that the compressor can restart. If the running duration of the compressor is longer than 10min, the protection
times will be cleared to zero time.
4) Communication malfunction
Detection of the quantity of installed indoor units: after 3min of energizing, if the outdoor unit does not receive the communication data of
certain indoor unit, the outdoor unit will judge that indoor unit is not installed. If the outdoor unit receives the communication data of that
indoor unit later, the communication malfunction will be cleared.
5) System high-pressure protection
a. When the high-pressure switch detects the system pressure higher than limit ,then the high-pressure switch cuts off, the system will stop to
run.
b. If high-pressure protection is detected for one time, only by cutting off the power and then reenergize that the compressor can restart.
6) Compressor overload protection
No matter the compressor is on or off, when the compressor overload switch is detected activated, the system will stop and indoor unit
will display H3. If the compressor overload protection appears for more than 6 times, in this case, only by cutting off the power and then
reenergize that the compressor can restart. If the running duration of the compressor is longer than 30min, the protection times will be
cleared to zero.
7) Antifreeze protection
Under cooling and dry mode, 6minutes after the compressor is started:
When it is detected for 10 minutes successively that Tevap. Is less than -2OC(varying with indoor unit), the antifreeze protection will be
activated, in which case the outdoor unit will immediately shut off the indoor electronic expansion valve and the capacity will be set to “0”.
If Tevap. exceed 10OC and the compressor has remained at OFF for at least 3minutes, the compressor will resume its original operation state.