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Midea VRF V4 Plus I Series, Manual

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Midea VRF V4 Plus I Series Manual Download Page 106

R410A DC Inverter V4 Plus 50Hz                                                                                                                          MCAC-VTSM-2014-04 

106 

 

Troubleshooting 

5.11 P3/XP7/P8: Compressor current protection (Display on faulty unit, all the ODU in standby) 
P3: Current protection of inverter compressor 

When the current of inverter compressor is over12A,  the system will display P3 protection, all the ODU in 
standby. When the current goes back to normal range, P3 disappear and normal operation resumes. 
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: 

 

1. The phenomenon of the indoor load is too large

①

: 

The suction temperature and discharge temperature are both higher than normal value. 

2. The phenomenon of The high pressure side of the system is blocked

②

: 

The high pressure is higher than normal value, the low pressure is lower than normal value, and the discharge temperature is 
higher than normal value. 

3. The phenomenon of the refrigerant is excess

③

: 

The high pressure is higher than normal value, the low pressure is higher than normal value, and the discharge temperature is 
lower than normal value. 

4. The phenomenon of the system contains air or nitrogen

④

: 

The high pressure is higher than normal value, current is larger than normal value, discharge temperature is higher than 
normal value, compressor makes noise, pressure meter do not display steady. 

5. How to check whether compressor is error

⑤

: 

Measure  the  resistance  between  two  terminals  among  the  three  terminals  of  compressor.  The  resistance  between  two 
terminals is 2-5

Ω, the resistance between each terminal and ground is infinity, if the resistance is out of the normal range, the 

compressor is error. 
*The normal system running parameters please refer to attached table 3. 
 
 
 

P3/XP7/P8: Compressor current 
protection 

The indoor load is too large

①

 

Make sure the ratio of connectable 
IDU is less than 130% or add ODU 

No 

Yes 

The heat exchange of condenser 
is not good. It may be caused by 
dirty heat changer, abnormal ODU 
fan running, ODU are too near to 
each other, etc. 

Check the system and 
fixed up the error   

No 

Yes 

The high pressure side of the system is 
blocked

②

  for squashed pipe, blocked 

valve or closed stop valve 

Make sure all valves are open, 
check the system, and remove 
the obstacle   

Refrigerant is excess

③

 

Discharge part of the refrigerant. Add 
some oil if it leaks during the discharge 

System contains air or nitrogen

④

   

Discharge the entire refrigerant. Then 
vacuum the system and refill the refrigerant. 
Add oil to the system if it leaks. 

Yes 

No 

No 

Yes 

Yes 

High voltage short circuit or 
compressor error

⑤

   

Make sure the high voltage circuit is normal, 
or replace the compressor 

Yes 

No 

MC9S08AC128 

chip 

is 

disabled   

Main board is disabled   

Replace main board 

No 

Yes 

No 

Summary of Contents for VRF V4 Plus I Series

Page 1: ...MCAC VTSM 2014 04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz General Information 1 Part 1 General Information 1 Product lineup 2 2 Nomenclature 3 3 Features 4 4 Indoor units lineup 9...

Page 2: ...730W DRN1 i C MDV 785W DRN1 i C MDV 850W DRN1 i C MDV 900W DRN1 i C Outdoor units basic information Model Net dimension W H D mm Net Gross weight kg Max quantity of connectable indoor units MDV 730W...

Page 3: ...V4 Plus Individual Series 50Hz General Information 3 2 Nomenclature MDV 730 W D R N1 i C Series code i Individual type Refrigerant type N1 R410A Power supply R 380 415V 3Ph 50Hz D DC inverter type W O...

Page 4: ...a ture A 32HP outdoor unit supports up to 53 indoor units freeing up considerable space outside use your backyard more wisely with much more space available created by less number of outdoor units Max...

Page 5: ...er and enhance heat exchange performance Hydrophilic film fins and inner threaded copper pipes optimize heat exchange efficiency 40 Pa 20 40 60 80 100 200 1000 45 New structure enhanced mid frequency...

Page 6: ...n after Y hours Model 1 X 6 hours Y 10 hours Model 2 X 8 hours Y 10 hours Model 3 X 6 hours Y 12 hours Model 4 X 8 hours Y 8 hours Notes This function can be activated by setting at site Temperature l...

Page 7: ...trofit the existing system with a centralized control by simply connecting to the outdoor units PQE XYE only one set of PQE communication wires can achieve communication among indoor units outdoor uni...

Page 8: ...venient spot checking and status enquiry Compressor is located near the door which simplifies checks and enables valve or compressor parts to be replaced easily Self diagnosis function helps service e...

Page 9: ...acity 100W Cassette type One way cassette Two way cassette Compact four way cassette Four way cassette 15 18 22 28 36 45 56 71 80 90 100 112 140 Capacity 100W Duct type Low static pressure duct Medium...

Page 10: ...Uncased floor standing Ceiling floor console 22 28 36 45 56 71 80 90 112 140 160 Capacit y 100W Wall mounted Fresh air processing unit Wall mounted S panel Wall mounted C panel Wall mounted R panel W...

Page 11: ...cations Performances 11 Part 2 Specifications Performances 1 Specifications 12 2 Dimensions 14 3 Service space 15 4 Piping diagrams 17 5 Wiring diagrams and field wiring 19 6 Field wiring 20 7 Electri...

Page 12: ...ase heater W 33 33 33 33 Refrigerant oil type FVC68D FVC68D FVC68D FVC68D Refrigerant oil charge ml 500 500 500 500 Fixed inverter compressor Model E655DH 65D2YG GC Type Scroll Scroll Scroll Scroll Br...

Page 13: ...air flow m 3 h 20617 20617 20617 20617 Sound pressure level dB A 64 64 65 65 Connectable indoor unit Total capacity 50 130 50 130 50 130 50 130 Max quantity 43 46 50 53 Outdoor unit Net dimension W H...

Page 14: ...R410A DC Inverter VRF V4 Plus Individual Series 50Hz MCAC VTSM 2014 04 14 Specifications Performances 2 Dimensions MDV 730W DRN1 i C MDV 785W DRN1 i C MDV 850W DRN1 i C MDV 900W DRN1 i C...

Page 15: ...us Individual Series 50Hz Specifications Performances 15 3 Service space Ensure enough space for maintenance The modules in the same system must be on the same height When the outdoor unit is higher t...

Page 16: ...r to the layout used when the outdoor unit is higher than the surrounding obstacle However to avoid cross connection of the outdoor hot air from affecting the heat exchange effect please add an air di...

Page 17: ...ter VRF V4 Plus Individual Series 50Hz Specifications Performances 17 4 Piping diagrams SV2 OL LC RC SV4 SV3 ST1 ST2 SV5 SV6 EXVB EXVA SV6 F3 F2 F1 BP SV2 OL LC RC SV4 SV3 ST1 ST2 SV5 SV6 EXVB EXVA SV...

Page 18: ...and it will be closed when the discharge temperature is lower than 90o C SV3 It is used to return the refrigerant and the oil SV3 opens regularly SV4 It is used to help the oil in oil separator retur...

Page 19: ...MCAC VTSM 2014 04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz Specifications Performances 19 5 Wiring diagrams and field wiring...

Page 20: ...r connected with each other and jointed to the sheet metal along to the earth Control wire could not be bound together with refrigerant pipeline and power wire When power wire and control wire is dist...

Page 21: ...MCAC VTSM 2014 04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz Specifications Performances 21 Power 380 415V 50Hz...

Page 22: ...2 7 2 Notes 1 RLA is based on the following conditions Indoor temp 27 C DB 19 C WB Outdoor temp 35 C DB 2 TOCA means the total value of each OC set 3 MSC means the Max current during the starting of...

Page 23: ...0 3 24 8 9 76 55 25 3 8 45 64 1 3 23 5 6 69 4 8 23 9 8 71 5 9 24 7 5 72 8 9 24 8 8 73 2 4 24 9 0 73 9 7 24 9 8 75 05 25 8 6 48 64 1 3 24 4 0 71 9 6 24 7 6 78 0 5 24 9 8 79 4 9 25 1 0 80 1 3 25 1 8 79...

Page 24: ...0 73 2 2 24 6 6 73 4 5 25 3 2 45 54 2 3 17 2 3 64 6 6 21 6 6 69 1 0 24 4 9 70 1 0 24 6 8 71 2 5 24 7 3 72 4 8 25 3 4 72 7 7 25 9 1 48 59 3 9 17 8 3 70 8 1 23 5 0 74 5 7 24 6 5 75 5 5 24 8 5 77 1 5 24...

Page 25: ...22 7 5 69 8 7 24 3 9 70 8 3 24 9 4 72 1 4 25 1 5 45 44 3 2 14 3 5 52 9 3 18 0 9 61 5 3 21 8 5 65 7 0 23 5 1 69 8 7 25 0 7 70 4 4 25 2 0 71 0 4 25 4 8 48 44 3 2 15 1 5 52 9 3 18 9 3 61 5 3 22 6 7 65 7...

Page 26: ...1 1 0 16 3 9 54 4 9 17 4 4 61 0 1 20 9 2 67 7 8 24 3 4 45 34 4 2 10 4 8 41 1 9 12 7 4 47 7 1 15 0 3 51 1 0 16 6 6 54 4 9 18 3 1 61 0 1 22 0 5 67 7 8 25 2 7 48 34 4 2 10 7 5 41 1 9 12 8 5 47 7 1 15 1 8...

Page 27: ...9 7 93 18 24 64 4 24 29 46 4 93 34 15 5 65 36 50 6 04 38 85 6 43 43 54 7 24 48 49 8 08 20 24 64 4 30 29 46 4 99 34 15 5 74 36 50 6 13 38 85 6 55 43 54 7 36 48 49 8 23 21 24 64 4 33 29 46 5 05 34 15 5...

Page 28: ...9 0 81 76 27 0 1 82 31 27 5 4 45 68 9 7 25 5 7 74 7 2 26 0 3 76 9 8 26 8 6 78 3 9 26 9 9 78 76 27 0 2 79 54 27 1 1 80 70 28 0 6 48 68 9 7 26 4 8 77 3 8 26 8 7 83 9 3 27 1 1 85 4 8 27 2 4 86 17 27 3 3...

Page 29: ...77 3 1 26 5 9 78 7 3 26 7 6 78 99 27 4 8 45 58 3 1 18 6 9 69 5 3 23 5 1 74 3 0 26 5 7 75 3 8 26 7 8 76 6 2 26 8 3 77 9 4 27 5 0 78 25 28 1 1 48 63 8 6 19 3 5 76 1 5 25 5 0 80 1 9 26 7 5 81 2 4 26 9 7...

Page 30: ...9 75 1 4 26 4 7 76 1 7 27 0 7 77 5 8 27 2 9 45 47 6 6 15 5 7 56 9 2 19 6 4 66 1 6 23 7 1 70 6 5 25 5 2 75 1 4 27 2 1 75 7 5 27 3 5 76 3 9 27 6 5 48 47 6 6 16 4 4 56 9 2 20 5 4 66 1 6 24 6 1 70 6 5 25...

Page 31: ...54 9 5 17 7 9 58 5 9 18 9 3 65 6 0 22 7 0 72 8 9 26 4 1 45 37 0 1 11 3 7 44 3 0 13 8 2 51 3 1 16 3 1 54 9 5 18 0 8 58 5 9 19 8 7 65 6 0 23 9 3 72 8 9 27 4 2 48 37 0 1 11 6 6 44 3 0 13 9 5 51 3 1 16 4...

Page 32: ...61 18 26 49 4 60 31 68 5 35 36 73 6 13 39 25 6 55 41 77 6 98 46 82 7 86 52 15 8 77 20 26 49 4 66 31 68 5 41 36 73 6 23 39 25 6 65 41 77 7 11 46 82 7 99 52 15 8 94 21 26 49 4 70 31 68 5 48 36 73 6 29 3...

Page 33: ...6 54 31 4 6 88 53 31 5 9 89 13 32 2 1 45 74 6 8 29 9 0 80 9 0 30 4 4 83 36 31 4 1 84 88 31 5 7 85 28 31 6 0 86 12 31 7 0 87 38 32 8 2 48 74 6 8 30 9 6 83 7 9 31 4 2 90 87 31 7 0 92 56 31 8 5 93 30 31...

Page 34: ...7 1 31 0 9 85 25 31 3 0 85 53 32 1 3 45 63 1 4 21 8 6 75 2 9 27 4 9 80 4 6 31 0 7 81 6 2 31 3 1 82 9 6 31 3 8 84 39 32 1 5 84 73 32 8 8 48 69 1 5 22 6 3 82 4 6 29 8 2 86 8 3 31 2 8 87 9 7 31 5 4 89 8...

Page 35: ...8 8 7 81 3 6 30 9 6 82 4 8 31 6 5 84 00 31 9 1 45 51 6 1 18 2 1 61 6 3 22 9 6 71 6 4 27 7 3 76 5 0 29 8 4 81 3 6 31 8 2 82 0 2 31 9 8 82 72 32 3 4 48 51 6 1 19 2 2 61 6 3 24 0 3 71 6 4 28 7 8 76 5 0 3...

Page 36: ...59 5 0 20 8 0 63 4 4 22 1 3 71 0 4 26 5 5 78 9 3 30 8 8 45 40 0 7 13 2 9 47 9 6 16 1 7 55 5 6 19 0 7 59 5 0 21 1 4 63 4 4 23 2 3 71 0 4 27 9 9 78 9 3 32 0 7 48 40 0 7 13 6 4 47 9 6 16 3 1 55 5 6 19 2...

Page 37: ...69 5 38 34 30 6 25 39 77 7 17 42 50 7 67 45 23 8 16 50 70 9 19 56 47 10 26 20 28 69 5 45 34 30 6 33 39 77 7 28 42 50 7 78 45 23 8 31 50 70 9 34 56 47 10 45 21 28 69 5 49 34 30 6 41 39 77 7 36 42 50 7...

Page 38: ...7 28 6 9 86 2 1 30 3 6 89 21 31 3 4 90 82 31 5 9 91 63 31 6 8 93 74 31 8 1 94 37 32 4 4 45 79 0 7 30 1 1 85 6 6 30 6 5 88 26 31 6 3 89 87 31 7 9 90 30 31 8 2 91 19 31 9 3 92 52 33 0 5 48 79 0 7 31 1 8...

Page 39: ...1 08 31 4 1 91 97 31 7 1 43 66 8 6 21 3 3 79 7 2 27 5 3 86 0 6 31 0 1 87 3 4 31 1 6 88 63 31 3 1 90 27 31 5 2 90 56 32 3 6 45 66 8 6 22 0 2 79 7 2 27 6 8 85 1 9 31 2 9 86 4 3 31 5 4 87 84 31 6 0 89 35...

Page 40: ...1 4 7 89 72 31 6 5 43 54 6 4 17 2 4 65 2 5 22 0 3 75 8 6 26 8 3 81 0 0 29 0 8 86 1 4 31 1 8 87 3 3 31 8 8 88 94 32 1 4 45 54 6 4 18 3 4 65 2 5 23 1 3 75 8 6 27 9 3 81 0 0 30 0 5 86 1 4 32 0 4 86 8 4 3...

Page 41: ...2 25 8 0 83 5 7 30 1 6 43 42 4 3 13 1 0 50 7 8 15 9 4 58 8 2 18 8 1 63 0 0 20 9 5 67 1 8 22 2 9 75 2 2 26 7 4 83 5 7 31 1 0 45 42 4 3 13 3 9 50 7 8 16 2 8 58 8 2 19 2 1 63 0 0 21 2 9 67 1 8 23 4 0 75...

Page 42: ...07 53 68 9 10 59 79 10 14 18 30 38 5 42 36 32 6 30 42 11 7 22 45 00 7 72 47 89 8 22 53 68 9 26 59 79 10 33 20 30 38 5 49 36 32 6 38 42 11 7 34 45 00 7 83 47 89 8 37 53 68 9 41 59 79 10 52 21 30 38 5...

Page 43: ...58 7 7 6 68 05 20 06 68 05 20 79 67 79 21 51 67 79 21 88 67 53 22 23 67 53 22 95 5 5 6 71 67 20 71 71 41 21 40 71 15 22 10 71 15 22 45 71 15 22 79 70 90 23 46 3 3 7 75 04 21 32 75 04 21 99 74 78 22 63...

Page 44: ...57 24 00 64 57 24 26 64 57 24 56 63 79 24 80 7 7 6 67 15 23 25 67 15 23 78 66 90 24 34 66 90 24 61 66 90 24 88 63 79 23 68 5 5 6 70 77 23 76 70 51 24 26 70 51 24 77 70 25 25 04 68 44 24 26 63 79 22 26...

Page 45: ...0 73 52 01 19 34 48 90 17 98 47 35 17 31 45 79 16 64 42 69 15 36 7 7 6 55 11 19 82 52 01 18 51 48 90 17 20 47 35 16 59 45 79 15 94 42 69 14 74 5 5 6 55 11 18 67 52 01 17 44 48 90 16 24 47 35 15 65 45...

Page 46: ...22 89 70 00 23 30 70 00 23 74 69 72 24 55 7 7 6 73 06 21 82 73 06 22 60 72 78 23 39 72 78 23 80 72 50 24 18 72 50 24 96 5 5 6 76 95 22 52 76 67 23 27 76 39 24 03 76 39 24 41 76 39 24 79 76 12 25 51 3...

Page 47: ...32 26 09 69 32 26 38 69 32 26 70 68 49 26 97 7 7 6 72 10 25 28 72 10 25 86 71 82 26 47 71 82 26 76 71 82 27 05 68 49 25 75 5 5 6 75 98 25 83 75 70 26 38 75 70 26 94 75 42 27 23 73 48 26 38 68 49 24 20...

Page 48: ...83 21 03 52 50 19 55 50 84 18 82 49 17 18 09 45 83 16 70 7 7 6 59 17 21 56 55 83 20 13 52 50 18 70 50 84 18 04 49 17 17 34 45 83 16 03 5 5 6 59 17 20 30 55 83 18 97 52 50 17 66 50 84 17 02 49 17 16 3...

Page 49: ...8 5 0 7 7 6 79 32 25 3 2 79 32 26 2 4 79 02 27 1 5 79 02 27 6 2 78 72 28 0 6 78 72 28 9 7 5 5 6 83 54 26 1 3 83 24 27 0 1 82 93 27 8 9 82 93 28 3 3 82 93 28 7 7 82 64 29 6 1 3 3 7 87 47 26 9 1 87 47 2...

Page 50: ...58 75 27 30 29 75 27 30 62 75 27 31 00 74 36 31 30 7 7 6 78 28 29 34 78 28 30 02 77 98 30 73 77 98 31 06 77 98 31 40 74 36 29 88 5 5 6 82 49 29 98 82 19 30 62 82 19 31 27 81 88 31 61 79 78 30 62 74 3...

Page 51: ...7 00 22 69 55 19 21 85 53 38 21 00 49 76 19 38 7 7 6 64 24 25 02 60 62 23 37 57 00 21 71 55 19 20 93 53 38 20 12 49 76 18 60 5 5 6 64 24 23 57 60 62 22 01 57 00 20 49 55 19 19 75 53 38 19 01 49 76 17...

Page 52: ...50 25 8 1 83 50 26 7 4 83 18 27 6 7 83 18 28 1 5 82 86 28 6 0 82 86 29 5 3 5 5 6 87 94 26 6 4 87 62 27 5 3 87 30 28 4 3 87 30 28 8 7 87 30 29 3 2 86 99 30 1 8 3 3 7 92 07 27 4 3 92 07 28 2 9 91 75 29...

Page 53: ...15 79 23 30 87 79 23 31 21 79 23 31 59 78 27 31 90 7 7 6 82 40 29 91 82 40 30 60 82 08 31 32 82 08 31 66 82 08 32 00 78 27 30 46 5 5 6 86 83 30 56 86 52 31 21 86 52 31 87 86 19 32 21 83 98 31 21 78 2...

Page 54: ...0 00 23 13 58 10 22 27 56 19 21 41 52 38 19 75 7 7 6 67 62 25 50 63 81 23 81 60 00 22 13 58 10 21 34 56 19 20 51 52 38 18 96 5 5 6 67 62 24 02 63 81 22 44 60 00 20 89 58 10 20 13 56 19 19 37 52 38 17...

Page 55: ...stalled Sound level can be increased in static pressure mode or used air guide Model Sound pressure level d B A MDV 730W DRN1 i C 64 MDV 785W DRN1 i C 64 MDV 850W DRN1 i C 65 MDV 900W DRN1 i C 65 Soun...

Page 56: ...odel name Packing Size mm Gross Weight kg Function Branch Joint of outdoor unit FQZHW 02N1D 255 150 185 1 5 Distribute the refrigerant to Indoor Units and balance the resistance between each outdoor u...

Page 57: ...MCAC VTSM 2014 04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz Selection Procedure 57 Part 3 Selection Procedure 1 Introduction 58 2 Unit selection based on cooling load 61...

Page 58: ...combination Actual capacity has to be calculated according to the combination by using outdoor unit capacity table Calculation of actual capacity of indoor unit Because the capacity of a multi air con...

Page 59: ...odel 22 Model 28 Model 36 Model 45 Model 56 Model 71 Model 80 Model 90 Model 112 Capacity Index kW 1 8 2 2 2 8 3 6 4 5 5 6 7 1 8 0 9 0 11 2 Unit Size Model 125 Model 140 Model 160 Model 200 Model 250...

Page 60: ...d indoor unit Positive data means outdoor unit is top Negative data means outdoor unit is down 1 5 2 Heating capacity modification Modification coefficient of the length and high difference of refrige...

Page 61: ...2 4 5 1 51 5kW Select outdoor unit MDV 560W DRN1 i C which has nominal cooling capacity 56kW Calculate the proportion between and 51 5 56 92 2 Result Because the proportion is within 50 130 it is a r...

Page 62: ...have accomplished the calculation But if you think this result is not acceptable you can repeat the above process Remark In this sample the other capacity modification indexes don t be considered and...

Page 63: ...e 65 4 Lifting method 67 5 Set the snow proof facility 68 6 Air ventilation assembly installation 68 7 Refrigerant piping installation 70 8 Branch pipe installation 75 9 Remove dirt or water in the pi...

Page 64: ...avoid the abnormal noise generated due to base Base types Steel structure base or concrete base See the figure below for the general making method Note The key points to make basement The master unit...

Page 65: ...own as follow The spacing between the two cement piers shall not be exceeded over than 650mm Size mm 26 28 30 32HP A 2410 B 2540 C 736 D 765 E 950 3 Installation space Ensure enough space for maintena...

Page 66: ...R410A DC Inverter VRF V4 Plus Individual Series 50Hz MCAC VTSM 2014 04 66 Installation When the outdoor unit is higher than the surrounding obstacle One row Two rows More than two rows...

Page 67: ...se two ropes to hoist the machine keep the machine in balance and then raise it safely and steadily In case of no package or if the package is damaged use plates or packing material to protect it When...

Page 68: ...e stand so that drainage will not be prevented Avoid using a stand with a flat surface 2 Mount a snowfall hood onto the air inlet and the air outlet In snowy areas facilities should be installed to pr...

Page 69: ...tallation 69 Size mm A A 300 B B 250 C C 10000 D 600 D 760 15o Curve diagram of static pressure air flow volume Static pressure Note 0Pa Factory default 0 20Pa Remove the steel meshes connect the air...

Page 70: ...R410A DC Inverter VRF V4 Plus Individual Series 50Hz MCAC VTSM 2014 04 70 Installation 7 Refrigerant piping installation 7 1 Valve instructions Unit mm...

Page 71: ...the outdoor unit is on the top position and the difference of level is over 20m it is recommended that set a oil return bend every 10m in the gas pipe of the main pipe the specification of the oil ret...

Page 72: ...nit to the farthest indoor unit and the outdoor unit to the nearest indoor unit 40m L1 L5 L8 L9 j L1 L2 L3 a 40m 7 3 Refrigerant piping selection Pipe name Main pipe L1 Indoor unit main pipe L2 L3 L4...

Page 73: ...the indoor unit main pipe L6 is 22 2 9 5 the branch pipe assembly F is FQZHN 02D 2 The downstream indoor units of L5 are N5 N6 and N7 which capacity is 140 140 140 420 460 Refer to table 2 the indoor...

Page 74: ...ll pipes in this system is larger than 90m refer to table 3 the main pipe L1 is 38 1 22 2 As the main pipe L1 is selected as 31 8 19 1 from step 2 and 31 8 19 1 from step 3 we finally select the large...

Page 75: ...r tightness test is conducted by pressurized nitrogen R22 system 28kgf cm 2 R410A system 40kgf cm 2 It is not allowed to adopt oxide flammable gas and toxic gas to conduct air tightness test It s not...

Page 76: ...hen all the indoor units are in cooling or heating mode the system will be in refrigerant volume judgment mode automatically If the system judges that the refrigerant volume is normal the system will...

Page 77: ...should be universal Please set all the indoor unit power supply of one system into the same circuit It should turn on or shut down the unit at the same time otherwise the service life would affect ser...

Page 78: ...ts in the one system Please do not put the signal wires and power wires in the same wire tube keep distance between the two tubes Keep distance above 300mm when current capacity of power supply less t...

Page 79: ...alized control is needed one CCM03 central controller of indoor unit can only control the indoor units which are in the same refrigerant system via the port X Y E of outdoor unit Outdoor unit will aut...

Page 80: ...nfirm whether the system to debugging has been carried out vacuum drying and packed with refrigeration as required 15 2 Preparation before debugging Calculate the additional refrigerant quantity for e...

Page 81: ...kness through following steps and take necessary actions 1 Calculate the refrigerant charge A kg 2 Total refrigerant charge delivered refrigerant charge nameplate supplemental refrigerant charge 3 Cal...

Page 82: ...VTSM 2014 04 82 Troubleshooting Part 5 Troubleshooting 1 Outdoor electric control box assembly instructions 83 2 Main board ports instructions 85 3 Main board parts instructions 87 4 Error Protection...

Page 83: ...2014 04 R410A DC Inverter V4 Plus 50Hz Troubleshooting 83 1 Outdoor electric control box assembly instructions 1 1 1 2 1 3 1 4 1 5 1 6 1 11 1 12 3 1 12 2 1 12 1 1 7 1 9 1 13 1 10 1 8 1 14 2 2 2 4 2 5...

Page 84: ...oard 1 7 Main control box ass y 1 8 Reactance 1 9 Cement type resistor 1 10 Contactor 1 11 Current detection board ass y 1 12 Inverter module radiator ass y 1 12 1 Three phase bridge 1 12 2 50A1200V i...

Page 85: ...MCAC VTSM 2014 04 R410A DC Inverter V4 Plus 50Hz Troubleshooting 85 2 Main board ports instructions...

Page 86: ...network accounting 26 Power output of the No 2 transformer 9 Three phase detection port 27 Port for inverter module voltage inspection 10 Power input of the No 1 transformer 28 The sensor of inverter...

Page 87: ...ay content Current frequency Note 1 0 Outdoor unit address 0 2 1 Outdoor unit itself capacity 26 28 30 32 3 2 Modular outdoor unit Qty Available for main unit 4 3 Qty setting of indoor units Available...

Page 88: ...saturation temperature Actual value 30 21 20 Current of inverter compressor Actual value 22 21 Current of No 1 fixed compressor Actual value 23 22 Current of No 2 fixed compressor Actual value 24 23 C...

Page 89: ...tes Starting time is set about 12 minutes Default the Factory Set S2 definition S3 definition Night time selection is 6h 10h Default the Factory Set Night silent mode Default the Factory Set Outdoor p...

Page 90: ...re mode is medium pressure Reserve position use for customized unit Static pressure mode is high pressure Reserve position use for customized unit S5 definition S6 definition Heating priority mode Def...

Page 91: ...r main unit 1 3 Stand for slave unit Outdoor unit capacity setting switch Effective to 9 C 9 C Stand for 26HP 32HP ENC3 S12 definition Setting the numbers of indoor unit to be 0 15 Setting the numbers...

Page 92: ...l flash in Three phase phase sequence protection LED4 Malfunction indicator lamp of inverter module The lamp will flash if the inverter module is faulty and the error code will display on digital tube...

Page 93: ...pressure sensor error Air discharge pressure Pc 0 3Mpa 17 H9 Reserve Not recoverable unit re power on 18 HC Outdoor unit capacity setting error 19 P0 Inverter compressor top Temp protection 20 P1 High...

Page 94: ...lay directly on the digital tube you should press the check button after P6 disappear in one minute 5 Troubleshooting 5 1 E0 Communication error between outdoor units Only display on faulty slave unit...

Page 95: ...hen the quantity of outdoor units is large the phase sequence should be staggered then the current can be distributed to the three phases equally E1 Phase sequence error The 3 phase sequence of power...

Page 96: ...eries The signal wires are interfered by high voltage power voltage over 220V is high voltage power Signal wires are close to electromagnetic interference source Such as transfer strong fluorescent la...

Page 97: ...n and the buzzer isn t warning that means the address code is 14 8 4 2 If the four LED lights are flash and the buzzer isn t warning the address code should plus 16 that means the address code is 30 1...

Page 98: ...W 45kW 56kW The Operation light is normally on that means the capacity code is 8 and the achievable capacity of single PCB is 112 100W 4 0HP then add the value of two PCB so the capacity of indoor uni...

Page 99: ...The normal value of DC fan motor coil among U V W is less than 10 and the value of AC fan motor coil is from a few ohm to hundreds of ohm for different fan motor model If the measured value is 0 the f...

Page 100: ...ls of 21 CN29 port is 5V and between GND and 12V terminals of 21 CN29 port is 12V 2 How to check whether the transformer on Main board is disabled The voltage input for 10 CN31 and 11 CN33 terminals a...

Page 101: ...n Q and GND is DC2 5 2 7V If the voltage is out of the normal range the 485 communication IC is disabled Indoor units should be unified power supply which can prevent compressor from liquid hammer cau...

Page 102: ...the low pressure side is blocked The discharge temperature is higher than normal value low pressure is lower than normal value current is lower than normal value and suction pipe may be frosting The...

Page 103: ...echarging refrigerant 3 The phenomenon of the low pressure side is blocked The discharge temperature is higher than normal value low pressure is lower than normal value current is lower than normal va...

Page 104: ...l three phase protector and the three phase protector connect with high pressure switch in series connection the system will display P1 protection when fist power on and P1 protection will disappear a...

Page 105: ...refer to attached table 3 If the system install three phase protector and the three phase protector connect with high pressure switch in series connection the system will display P1 protection when fi...

Page 106: ...r do not display steady 5 How to check whether compressor is error Measure the resistance between two terminals among the three terminals of compressor The resistance between two terminals is 2 5 the...

Page 107: ...s higher than normal value 4 The phenomenon of the system contains air or nitrogen The high pressure is higher than normal value current is larger than normal value discharge temperature is higher tha...

Page 108: ...9 frequency difference between the real and the setting frequency more than 15Hz L0 module protection L5 Zero speed protection L7 Phase sequence error P6 will disappear in one minute Then press the ch...

Page 109: ...and three phase rectifier stack Note DC and AC switch in the measurement 3 If none of the above works replace the PCB Module check 1 DC voltage between P and N should be 296V to 324V 2 DC voltage betw...

Page 110: ...control box A is malfunction then check the inverter module If the compressor could not start normally that means the compressor is malfunction the go to step 3 to check the compressor Step 3 Check t...

Page 111: ...es are OK replace the PCB 5 14 3 L2 troubleshooting Step 1 Check the DC voltage between P and N terminal the normal value should be 510V 580V if the voltage is higher than 580V go to step 2 Step 2 Che...

Page 112: ...43498 114 0 42304 5 46 5725 35 6 40021 75 1 38703 115 0 41164 4 44 36 6 13059 76 1 34105 116 0 4006 3 41 5878 37 5 87359 77 1 29078 117 0 38991 2 39 8239 38 5 62961 78 1 25423 118 0 37956 1 37 1988 3...

Page 113: ...0 57 72 8 94 112 2 63 7 261 4 33 38 89 73 8 643 113 2 559 6 247 8 34 37 3 74 8 358 114 2 489 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294...

Page 114: ...t temperature T4 20 27 27 33 33 38 38 45 Discharge pressure spot check MPa 2 1 2 3 2 8 3 1 3 3 3 5 3 7 3 9 Pressure of high pressure valve MPa 1 8 2 0 2 4 2 7 2 8 3 0 3 2 3 5 Pressure of low pressure...

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