Mars COMFORT-AIRE Century VFH-B Series User manual

Service Manual
VFH-B Series
Inverter Multi Zone Ductless Mini-Split
A-VFH30QB-1
A-VFH36QB-1
A-VFH42PB-1
www.marsdelivers.com

Service Manual - VFH-B 30/36/42 Series
3
Table of Contents
Part Ė: Technical Information.......................................................................4
1. Summary......................................................................................................................4
6SHFL¿FDWLRQV..........................................................................................................5
6SHFL¿FDWLRQ6KHHW................................................................................................................5
&RROLQJ&DSDFLW\7DEOHV ........................................................................................................9
3.
Outline Dimension Diagram........................................................................12
4. Refrigerant System Diagram......................................................................13
5.
Electrical Part...........................................................................................................14
:LULQJ'LDJUDP....................................................................................................................14
3&%3ULQWHG'LDJUDP ..........................................................................................................16
6.
Function and Control........................................................................................17
Part ė: Installation and Maintenance .................................................19
7.
Safety Precautions.............................................................................................19
8.
Installation Manual.............................................................................................21
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,QVWDOODWLRQ,QVWUXFWLRQ..........................................................................................................24
9.
Troubleshooting ...................................................................................................29
0DOIXQFWLRQ,QGLFDWRU ..........................................................................................................30
0DOIXQFWLRQ&KHFNLQJDQG(OLPLQDWLRQ.................................................................................31
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10.
Exploded View and Parts List
...............................................................39
11.
Removal Procedure........................................................................................43
Appendix:........................................................................................................................55
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$SSHQGL[3LSHH[SDQGLQJPHWKRG.........................................................................................55
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Service Manual - VFH-B 30/36/42 Series
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1. Summary
Part Ė: Technical Information
Outdoor Unit
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6HQVLWLYHFDSDFLW\: 6560 6580 8050 10880 11300 11800
7RWDOSRZHULQSXW: 2820 2150 2750 2850 2950 2480
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
18OC(64O)'
12OC(54O):
7RWDOFDSDFLW\: 6400 6530 8200 9000 11050 11600
6HQVLWLYHFDSDFLW\: 6400 6530 8200 9000 11050 11600
7RWDOSRZHULQSXW: 2950 2280 2980 2950 3100 2630
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
21OC(70O)'
15OC(59O):
7RWDOFDSDFLW\: 6450 6450 7900 8850 10750 11450
6HQVLWLYHFDSDFLW\: 6450 6450 7900 8850 10750 11450
7RWDOSRZHULQSXW: 3100 2400 3080 3100 3220 2750
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
24OC(75O)'
17OC(63O):
7RWDOFDSDFLW\: 6400 6380 7950 8550 10650 11080
6HQVLWLYHFDSDFLW\: 6400 6380 7950 8550 10650 11080
7RWDOSRZHULQSXW: 3150 2500 3130 3200 3400 2930
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
&RROLQJ
+HDWOLQJ
2.2 Cooling Capacity Tables
5220 02'(/.
&211(&7,9(,1'22581,7
*:+7%''1$$,î
*:+7%''1$$,î
287'2257(03(5$785('5<
,1'225
7(03(5$785(
20OC
68O)
25OC
77O)
30OC
86O)
35OC
95O)
40OC
104O)
45OC
113O)
21OC(70O)'
15OC(59O):
7RWDOFDSDFLW\: 7186 8391 9044 8474 6697 5228
6HQVLWLYHFDSDFLW\: 6194 6818 7084 6779 6127 5175
7RWDOSRZHULQSXW: 1736 2108 2826 3099 2566 2172
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 85.3 81.2 78.3 79.9 91 98.9
24OC(75O)'
17OC(63O):
7RWDOFDSDFLW\: 8074 9106 9696 9149 7195 5631
6HQVLWLYHFDSDFLW\: 6950 7474 7659 7414 6703 5585
7RWDOSRZHULQSXW: 1760 2111 2853 3121 2583 2207
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 85.65 82 78.9 81 93.1 99.1
27OC(80O)'
19OC(67O):
7RWDOFDSDFLW\: 8884 9921 10310 9863 7635 7543
6HQVLWLYHFDSDFLW\: 7533 8027 9587 7665 7169 7359
7RWDOSRZHULQSXW: 2009 2365 2905 3206 2773 2835
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 84.55 80.9 92.9 76.9 93.8 97.5
32OC(90O)'
23OC(73O):
7RWDOFDSDFLW\: 9152 10953 11606 10847 8300 6389
6HQVLWLYHFDSDFLW\: 8558 8374 8584 8359 7377 6268
7RWDOSRZHULQSXW: 2025 2402 2955 3267 2668 2244
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 93.5 76.4 80.9 77 88.8 98

Service Manual - VFH-B 30/36/42 Series
10
5220 02'(/.
&211(&7,9(,1'225
81,7
*:+7%''1$$,î
287'2257(03(5$785('5<
,1'225
7(03(5$785(
-13.88OC(7O)'
-15OC(5O):
-8.33OC(17O)  ' 
-9.44OC(15O):
-2.22OC(28O)'
-3.89OC(25O):
3.33OC(38O)  ' 
1.67OC(35O):
8.33OC(47O)'
6.11OC(43O):
13.89OC(57O)'
12.7OC(55O):
15OC(59O)'
10OC(50O):
7RWDOFDSDFLW\: 7480 8880 9720 12050 11400 12000
6HQVLWLYHFDSDFLW\: 7480 8880 9720 12050 11400 12000
7RWDOSRZHULQSXW: 3450 3200 2960 3280 2370 2000
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
18OC(64O)'
12OC(54O):
7RWDOFDSDFLW\: 7680 8750 9540 11700 11250 11800
6HQVLWLYHFDSDFLW\: 7680 8750 9540 11700 11250 11800
7RWDOSRZHULQSXW: 3440 3360 3100 3300 2520 2140
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
21OC(70O)'
15OC(59O):
7RWDOFDSDFLW\: 8275 8720 9500 11500 11000 11500
6HQVLWLYHFDSDFLW\: 8275 8720 9500 11500 11000 11500
7RWDOSRZHULQSXW: 3690 3490 3240 3580 2660 2250
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
24OC(75O)'
17OC(63O):
7RWDOFDSDFLW\: 8460 8800 9360 10690 10580 11300
6HQVLWLYHFDSDFLW\: 8460 8800 9360 10690 10580 11300
7RWDOSRZHULQSXW: 3785 3600 3410 3580 2780 2420
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100 100 100 100 100 100
&RROLQJ
+HDWOLQJ
5220 02'(/.
&211(&7,9(,1'22581,7
*:+7%''1$$,î
287'2257(03(5$785('5<
,1'225
7(03(5$785(
20OC
68O)
25OC
77O)
30OC
86O)
35OC
95O)
40OC
104O)
45OC
113O)
21OC(70O)'
15OC(59O):
7RWDOFDSDFLW\: 9560 10300 10400 9430 8045 6900
6HQVLWLYHFDSDFLW\: 8662 8880 8900 8435 7750 6800
7RWDOSRZHULQSXW: 2010 2450 3120 3300 3075 2765
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 90.6 86.2 85.6 89.4 96.3 98.6
24OC(75O)'
17OC(63O):
7RWDOFDSDFLW\: 9795 11500 11265 10500 8820 7515
6HQVLWLYHFDSDFLW\: 8805 9205 9485 9160 8365 7305
7RWDOSRZHULQSXW: 1995 2435 3125 3400 3085 2790
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 89.9 80.0 84.2 87.2 94.8 97.2
27OC(80O)'
19OC(67O):
7RWDOFDSDFLW\: 10135 11370 11425 10575 9025 7900
6HQVLWLYHFDSDFLW\: 9300 9610 9675 9355 8750 7555
7RWDOSRZHULQSXW: 2010 2440 3160 3335 3115 2800
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 91.8 84.5 84.7 88.5 97.0 95.6
32OC(90O)'
23OC(73O):
7RWDOFDSDFLW\: 12170 13200 13250 12020 10390 8700
6HQVLWLYHFDSDFLW\: 9875 10220 10155 10045 9575 8450
7RWDOSRZHULQSXW: 2025 2430 3185 3405 3145 2825
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 81.1 77.4 76.6 83.6 92.2 97.1

Service Manual - VFH-B 30/36/42 Series
11
+HDWOLQJ
&RROLQJ
5220 02'(/.
&211(&7,9(,1'225
81,7
*:+7%''1$$,î
*:+7%''1$$,î
287'2257(03(5$785('5<
,1'225
7(03(5$785(
-13.88OC(7O)'
-15OC(5O):
-8.33OC(17O)  ' 
-9.44OC(15O):
-2.22OC(28O)'
-3.89OC(25O):
3.33OC(38O)  ' 
1.67OC(35O):
8.33OC(47O)'
6.11OC(43O):
13.89OC(57O)'
12.7OC(55O):
15OC(59O)'
10OC(50O):
7RWDOFDSDFLW\: 7990 9122 9249 12680 11470 11800
6HQVLWLYHFDSDFLW\: 7990 9122 9249 12680 11470 11800
7RWDOSRZHULQSXW: 3580 3380 3320 3580 2380 2020
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100.0 100.0 100.0 100.0 100.0 100.0
18OC(64O)'
12OC(54O):
7RWDOFDSDFLW\: 8100 9080 9400 12700 11250 11700
6HQVLWLYHFDSDFLW\: 8100 9080 9400 12700 11250 11700
7RWDOSRZHULQSXW: 3550 3400 3300 3625 2530 2150
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100.0 100.0 100.0 100.0 100.0 100.0
21OC(70O)'
15OC(59O):
7RWDOFDSDFLW\: 8328 9053 9345 12200 11000 11420
6HQVLWLYHFDSDFLW\: 8328 9053 9345 12200 11000 11420
7RWDOSRZHULQSXW: 3660 3570 3400 3760 2650 2300
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100.0 100.0 100.0 100.0 100.0 100.0
24OC(75O)'
17OC(63O):
7RWDOFDSDFLW\: 8230 8960 8750 12100 10820 11400
6HQVLWLYHFDSDFLW\: 8230 8960 8750 12100 10820 11400
7RWDOSRZHULQSXW: 3760 3690 3400 3910 2820 2420
6HQVLWLYHFDSDFLW\:
7RWDOFDSDFLW\: 100.0 100.0 100.0 100.0 100.0 100.0
5220 02'(/.
&211(&7,9(,1'22581,7
*:+7%''1$$,î
*:+7%''1$$,î
287'2257(03(5$785('5<
,1'225
7(03(5$785(
20OC
68O)
25OC
77O)
30OC
86O)
35OC
95O)
40OC
104O)
45OC
113O)
21OC(70O)'
15OC(59O):
7RWDOFDSDFLW\: 9675 10320 10700 9900 8640 6800
6HQVLWLYHFDSDFLW\: 8720 8550 8510 8600 8000 6590
7RWDOSRZHULQSXW: 1980 2480 3650 3635 3600 2750
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 90.1 82.8 79.5 86.9 92.6 96.9
24OC(75O)'
17OC(63O):
7RWDOFDSDFLW\: 9840 11130 11295 10730 9915 7555
6HQVLWLYHFDSDFLW\: 8615 9075 9155 9320 9065 7200
7RWDOSRZHULQSXW: 1990 2685 3555 3485 3645 2775
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 87.6 81.5 81.1 86.9 91.4 95.3
27OC(80O)'
19OC(67O):
7RWDOFDSDFLW\: 10990 12130 12700 11960 10250 8400
6HQVLWLYHFDSDFLW\: 9415 9830 10000 9900 9550 7820
7RWDOSRZHULQSXW: 2000 2820 3600 3590 3670 2800
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 85.7 81.0 78.7 82.8 93.2 93.1
32OC(90O)'
23OC(73O):
7RWDOFDSDFLW\: 13150 14010 14235 12135 11100 8750
6HQVLWLYHFDSDFLW\: 10005 10100 10355 9910 9590 8215
7RWDOSRZHULQSXW: 2210 2515 3280 3555 3735 2830
6HQVLWLYHFDSDFLW\:7RWDO
FDSDFLW\: 76.1 72.1 72.7 81.7 86.4 93.9

Service Manual - VFH-B 30/36/42 Series
12
A-VFH36QB-1 A-VFH42PB-1
A-VFH30QB-1
8QLWLQFK
40
42 1/2
24 13/16
17 21/64
14 1/4
14 51/64
43 27/64
38 27/64
36 7/32
17 21/64
14 37/64
31
24
1523/32
8QLWLQFK
3. Outline Dimension Diagram

Service Manual - VFH-B 30/36/42 Series
13
4. Refrigerant System Diagram
Schematic Diagram of Free Match Series Inverter Heat Pump System
M
Heat Exchanger
Four-way Valve
Compressor
Silencer/Muffler
Gas/Liquid Separator/Accumulator
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heating
Cooling
Outdoor Uint
Indoor Uint
Electronic Expansion Valve
Schematic Diagram of Free Match Series Inverter Heat Pump System
The outdoor and indoor units start to work once the power is switched on. During the cooling operation,
the low temperature, low pressure refrigerant gas from the heat exchanger of each indoor unit gets together
and then is taken into the compressor to be compressed into high temperature, high pressure gas, which will
soon go to the heat exchanger of the outdoor unit to exchange heat with the outdoor air and then is turned into
refrigerant liquid. After passing through the throttling device, the temperature and pressure of the refrigerant
liquid will further decrease and then go the main valve. After that, it will be divided and go to the heat exchanger
of each indoor unit to exchange heat with the air which needs to be conditioned. Consequently, the refrigerant
liquid become low temperature, low pressure refrigerant gas again. Such a refrigeration cycle goes round and
round to achieve the desired refrigeration purpose. During the heating operation, the four-way valve is involved
to make the refrigeration cycle run reverse. The refrigerant radiates heat in the heat exchanger of the indoor
unit and absorbs heat in the heat exchanger of the outdoor unit for a heat pump heating cycle so as to
achieve the desired heating function.
High Pressure Swicth
Filter
Eutectic Stopper

Service Manual - VFH-B 30/36/42 Series
14
5. Electrical Part
5.1 Wiring Diagram
6\PERO 6\PERO&RORU 6\PERO 6\PERO&RORU 6\PERO 1DPH
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Service Manual - VFH-B 30/36/42 Series
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Service Manual - VFH-B 30/36/42 Series
16
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5.2 PCB Printed Diagram

Service Manual - VFH-B 30/36/42 Series
17
6. Function and Control
1.Function Control
1) Cooling mode
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GRHVQRWVWRS. TKHFRPSUHVVRUwill adjust to the frequency according to demand. When each indoor unit stops the corresponding electronic
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4) Fan mode
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2.Protection Function
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2) Overload protection
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Service Manual - VFH-B 30/36/42 Series
18
3) High exhaust temperature protection
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continuously DSSHDUVIRUWLPHVWKHFRPSUHVVRUFDQ¶WUHVXPHUXQQLQJ,QWKLVFDVHRQO\E\FXWWLQJRII WKHSRZHUDQGWKHQUHHQHUJL]ing
can the FRPSUHVVRUUHVWDUW,IWKHUXQQLQJGXUDWLRQRIWKHFRPSUHVVRULVORQJHUWKDQPLQWKHSURWHFWLRQ WLPHVZLOOEHFOHDUHGWR]HURWLPH
4) Communication malfunction
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5) System high-pressure protection
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E,IKLJKSUHVVXUHSURWHFWLRQLVGHWHFWHG, system power must be manually turned off and back on. In this case, only by cutting off the power
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6) Compressor overload protection
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7) Antifreeze protection
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,I7HYDSH[FHHGs50°F and the compressor has remained OFF for at least 3 minutes, the compressor will resume its original operation
state.

Service Manual - VFH-B 30/36/42 Series
19
Part ė: Installation and Maintenance
Follow these instructions to complete
the installation work.
Please read this manual carefully before
unit startup and service.
Before installation, please check to
make sure power supply is in
accordance with the requirements
specified on the nameplate.
Be sure to use the exclusive
accessories and parts to prevent water
leakage, electric shock and fire
accidents.
Wire size of power cord should be large
enough. The damaged power cord and
connection wire should be replaced by
appropriate cable.
Always comply with the nitrogen charge
requirements. Charge nitrogen when
welding pipes.
Please connect the wired controller
before energization, otherwise wired
controller cannot be used.
exclusive
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7. Safety Precautions
Installation should be conducted by
dealer or qualified personnel. Please do
not attempt to install the unit by yourself.
Improper handling may result in water
leakage, electric shock or fire disaster,
etc.
Make sure the unit can be grounded
properly to avoid electric shock. Please
do not connect the groundwire to gas
pipe, water pipe, lightning rod or
telephone line.
If refrigerant leakage happens during
installation, please ventilate
immediately. Poisonous gas will be
created if the refrigerant gas meets fire.
After connecting the power cord, please
fix the electric box cover properly in
order to avoid accident.
Never short-circuit or cancel the
pressure switch to prevent unit damage.
Before using the unit, please check to
make sure piping and wiring are correct
to avoid water leakage, refrigerant
leakage, electric shock, or fire, etc.

Service Manual - VFH-B 30/36/42 Series
20
Main Tools for Installation and Maintenance
1. Level meter, measuring tape
4. Electroprobe
7. Electronic leakage detector
10. Pipe pliers, pipe cutter
2. Screw driver
5. Universal meter
8. Vacuum pump
11. Pipe expander, pipe bender
3. Impact drill, drill head, electric drill
6. Torque wrench, open-end wrench, inner
hexagon spanner
9. Pressure meter
12. Soldering appliance, refrigerant container
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