Инструкция на Наружные блоки мини-VRF MDV серии Atom B бренда MDV

R410A

Atom B Series VRF 50/60Hz

CONTENTS Part 1 General Informa�on 3 Part 2 Component Layout and Refrigerant Circuits Part 3 Control 7 15 Part 4 Field Settings 23 Part 6 Diagnosis and Troubleshoo�ng CONTENTS Part 5 Electrical Components and Wiring Diagrams

Мм

Atom В Series VRF 50/60Hz 1епиеи\ ad1AJas 5эмэ$ я WOW AGIA

Part 1

General Informa�on 1 Indoor and Outdoor Unit Capaci�es 2 External Appearance 5 3 Combina�on Ra�o 6 4 Part 1 – General Informa�on 3

1 Indoor and Outdoor Unit Capaci�es

1.1 Indoor Units Table 1-1.1: Indoor unit abbreviation codes Abbreviation code Type Q1 One-way Casse�e Q4C Compact Four-way Casse�e Q4 Four-way Cassette T1 High Static Pressure Duct T2 Medium Sta�c Pressure Duct G Wall-mounted DL Ceiling and Floor Table 1-1.2: Indoor unit capacity range MDV Atom…

2 External Appearance

2.1 Indoor Units Table 1-2.1: Indoor unit appearance Four-way Casse�e Q1 Q4 Compact Four-way Casse�e Wall-mounted Q4C G High Sta�c Pressure Duct Medium Static Pressure Duct T1 T2 Medium Sta�c Pressure Duct (Arc Series Duct) Ceiling and Floor T2 DL Part 1 – General Informa�on One-way Casse�e 2.2…

Combina�on ra�o = Sum of capacity indexes of the indoor units Capacity index of the outdoor unit Table 1-3.1: Indoor and outdoor unit combination ra�o limitations Type Minimum combina�on ratio Maximum combination ratio Atom Series outdoor units 45% 130% MDV Atom Series Service Manual Table 1-3.2…

Part 2

Component Layout and Refrigerant Circuits 2 Refrigerant Flow Diagrams Part 2 – Component Layout and Refrigerant Circuits 1 Piping Diagrams

1 Piping Diagrams

Figure 2-1.1: 12/18/21 model piping diagram Liquid pipe Gas pipe Filter Temperature sensor Low pressure switch Temperature sensor 4 way valve Silencer Refrigerant radiator module Compressor Oil return hole Temperature sensor Distributor Accumulator Electronic expansion valae Filter DC motor MDV Atom…

Figure 2-1.3: 36 model piping diagram

Gas pipe Liquid pipe Filter Temperature sensor Low pressure switch 4 way valve Temperature sensor Refrigerant radiator module Oil sepetator Compressor Temperature sensor High pressure switch Distributor Accumulator Temperature sensor Part 2 – Component Layout and Refrigerant Circuits Silencer Filter…

Figure 2-1.5: 48/56 model piping diagram

Gas pipe Liquid pipe Filter Temperature sensor Low pressure switch Temperature sensor 4 way valve Oil seperator Refrigerant radiator module Compressor Temperature sensor High pressure switch Temperature sensor Distributor Accumulator Electronic expansion valve Oil return capiliary DC motor MDV Atom…

2 Refrigerant Flow Diagrams

Cooling opera�on Figure 2-2.1:12/18/21/28/36/42/48/56/60 models refrigerant flow during cooling opera�on Part 2 – Component Layout and Refrigerant Circuits Oil return opera�on in cooling mode Figure 2-2.4: 12/18/21/28/36/42/48/56/60 models refrigerant flow during oil return opera�on in cooling mode…

MDV Atom Series Service Manual Figure 2-2.7: 12/18/21/28/36/42/48/56/60 models refrigerant flow during heating opera�on Oil return opera�on in heating mode Figure 2-2.10: 12/18/21/28/36/42/48/56/60 models refrigerant flow during oil return opera�on in hea�ng mode 12

Figure 2-2.13: 12/18/21/28/36/42/48/56/60 models refrigerant flow during defros�ng opera�on Part 2 – Component Layout and Refrigerant Circuits 13

Мм

Atom Series VRF 50/60Hz Jenue|] ad1Asas $э14э$ Woy AGW 14

Part 3

Control 1 General Control Scheme Flowchart 16 2 Stop Opera�on 17 3 Startup Control 17 4 Normal Opera�on Control 5 Protec�on Control Standby Control 20 Part 3 - Control 7 Special Control 21 15

1 General Control Scheme Flowchart

Sec�ons 3-2 to 3-7 on the following pages detail when each of the controls in the flowchart below is ac�vated. 2 Stop opera�on ▪ Abnormal shutdown ▪ System stop MDV Atom Series Service Manual Thermo on Startup control ▪ Compressor startup delay control ▪ Startup control for cooling opera�on ▪…

2 Stop Opera�on

The stop opera�on occurs for one of the two following reasons: 1. Abnormal shutdown: in order to protect the compressors, if an abnormal state occurs the system makes a 'stop with thermo off' opera�on and an error code is displayed on the outdoor unit digital displays. 2. The system stops when the…

4 Normal Opera�on Control

4.1 Component Control during Normal Operation Table 3-4.1: Component control during normal cooling opera�on Component Inverter compressor Wiring diagram label COMP 12-60 model Control func�ons and states ● Controlled according to load requirement Fan speed controlled according to heat exchanger…

5 Protec�on Control

5.1 High Pressure Protec�on Control (exclude model 12/18/21/28) This control protects the system from abnormally high pressure and protects the compressors from transient spikes in pressure. Figure 3-5.1: High pressure protec�on control Normal opera�on Pc > 4.4MPa Pc < 3.2MPa High pressure…

5.4 Compressor and Inverter Module Protec�on Control

This control protects the compressors from abnormally high currents and protects the inverter modules from abnormally high temperatures. Figure 3-5.4: Compressor current protec�on control Normal opera�on Current ≥ Currentmax Current < Currentmax Compressor current protec�on, error code P3 is…

7 Special Control

7.1 Oil Return Operation In order to prevent compressors from running out of oil, the oil return opera�on is conducted to recover oil that has flowed out of the compressor(s) and into the piping system. This opera�on is performed for all units including units that are in standby. Timing of oil…

In order to recover hea�ng capacity, the defros�ng opera�on is conducted when the outdoor unit heat exchanger is performing as an evaporator. The defrosting opera�on is controlled according to outdoor ambient temperature, outdoor heat exchanger temperature, indoor heat exchanger temperature and…

Part 4

Field Se�ngs 1 Outdoor Unit Field Se�ngs 24 Part 4 - Field Se�ngs 23

1 Outdoor Unit Field Se�ngs

MDV Atom Series Service Manual Figure 4-1.1: 12/18/21/28 model outdoor unit main PCB Figure 4-1.2: 12/18/21/ 28 model outdoor unit communication switchboard 24

Table 4-1.1: 12/18/21/28 model outdoor unit main PCB switch set�ngs

Switch positions1 Switch Se�ng SW1 Force cooling Press SW1 to enter the forced cooling func�on; Press it again to exit the forced cooling func�on. SW2 Spot check Spot check bu�on S1 Description S1-1 is ON, Forced implementation of old indoor unit protocol S1-1 is OFF, Automa�cally adap�ng to indoor…

Figure 4-1.3: 36/42/48/56 model outdoor unit main PCB

Figure 4-1.4: 36/42/48/56 model outdoor unit communication switchboard 26

Table 4-1.2: 36/42/48/56 model outdoor unit main PCB switch set�ngs

Switch positions1 Switch Se�ng SW1 Force cooling Press SW1 to enter the forced cooling func�on; press it again to exit the forced cooling func�on. SW2 Spot check Spot check bu�on S1 S1-1 S1-1 is ON, Forced implementation of old IDU protocol S1-1 is OFF, Automa�c selec�on of the new or old protocol…

Table 4-1.2: 36/42/48/56 model outdoor unit main PCB switch set�ngs (continued)

Switch Se�ng Switch positions1 Description S4=0000 Network address of ODU: 0(default) S4=1000 Network address of ODU: 1 S4=0100 Network address of ODU: 2 S4=1100 Network address of ODU: 3 S4=0010 Network address of ODU: 4 S4=1010 Network address of ODU: 5 S4=0110 Network address of ODU: 6 S4=1110…

Figure 4-1.3: 60 model outdoor unit main PCB

Part 4 - Field Se�ngs Table 4-1.2: 60 model outdoor unit main PCB switch settings Switch positions1 Switch Se�ng Description SW1 Force cooling Press SW1 to enter the forced cooling func�on; press it again to exit the forced cooling func�on. SW2 Spot check Spot check bu�on ENC3 Network address…

Table 4-1.2: 60 model outdoor unit main PCB switch settings (con�nued)

S2 S2=0000 First on priority mode (by default) S2=1000 Cooling priority mode S2=0100 Automatic priority mode S2=1100 In response to hea�ng mode only S2=0010 In response to cooing mode only S2=0110 Hea�ng priority mode MDV Atom Series Service Manual S2-4 Notes: 1. Black denotes the switch posi�on. 30…

Table 4-1.3: Spot check display table (for all model)

No. Parameters displayed on DSP 0 Remarks Opera�ng frequency Opera�ng mode Actual value = value displayed 1 2 Opera�ng fan speed level Refer to Note 2 3 Total capacity requirement of indoor units 4 Total capacity requirement for the modified ODU 5 T3 Condenser temperature(°C) Actual value = value…

Part 5

Electrical Components and Wiring Diagrams 1 Outdoor Unit Electric Control Box Layout 33 2 Outdoor Unit Main PCB MDV Atom Series Service Manual 3 Wiring Diagrams

1 Outdoor Unit Electric Control Box Layout

Figure 5-1.1: Front view of 12/18/21/28 model electric control box Module board Power input and power filter PFC inductor IPM module DC fan motor control module Part 5 - Electrical Components and Wiring Diagrams Output control assembly Communica�on converter board Figure 5-1.2: Front view of…

Figure 5-1.3: Front view of 60 model electric control box

IPM module Switching power supply MDV Atom Series Service Manual PFC module Four-way valve Main control board 34

2 Outdoor Unit Main PCB

2.1 Ports Figure 5-2.1: 12/18/21/28 model outdoor unit main PCB ports Part 5 - Electrical Components and Wiring Diagrams Table 5-2.1: 12/18/21/28 model main PCB ports Label in Figure 5-1.1 CN6/CN6-1 CN7 CN8 CN60 CN16 6 CN18 Electronic expansion valve port 7 8 CN414 CN30 9 CN5 10 11 CN507 U/V/W Fan…

Figure 5-2.2: 36/42/48/56 model outdoor unit main board ports

Figure 5-2.3: 12/18/21/28/32/42/48/56 model outdoor unit communica�on converter board PCB Ports

Figure 5-2.4: 60 model outdoor unit main board ports

Table 5-2.4: 60 model outdoor unit main board ports Label in Figure 5-1 Port code Content CN502 CN501 CN4 Power input port Power input port Relay control port Communica�on port between outdoor unit and indoor unit Outdoor unit heat exchanger pipe temperature/outdoor environment temperature detection…

Figure 5-2.5: 60 model outdoor unit filter board Ports

2.2 Components

2.2.1 Func�on of bu�ons SW1 to SW2 Table 5-2.5: Func�on of bu�ons SW1 to SW2 Model Bu�on Function SW1 Force cooling bu�on SW2 Check bu�on Picture 36-60 2.2.2 Digital display output Table 5-2.6: Digital display output in different opera�ng states MDV Atom Series Service Manual Outdoor unit state 40…

3 Wiring Diagrams

Figure 5-3.1: 12/18/21/28 model wiring diagram Descrip�on Component code Descrip�on CH1-CH6 Magne�c ring STF1 Four-way valve COMP Compressor TL Refrigerant radiator temperature sensor EXV Electronic expansion valve XT1 Power supply terminal FAN DC fan T3 Outdoor heat exchanger temperature sensor…

Figure 5-3.2: 36/42/48/56 model wiring diagram

42 Component code Descrip�on Component code Descrip�on BR Rec�fier bridge stacking RL1 Relay CH1-CH7 Magne�c ring STF1 Four-way valve COMP. Compressor T3 Outdoor heat exchanger temperature sensor CT1 AC current transformer T4 Outdoor ambient temperature sensor D501-D503 Fast-recovery diode T5…

Figure 5-3.3: 60 model wiring diagram

Part 5 - Electrical Components and Wiring Diagrams Component code Descrip�on Component code Descrip�on XT1 3-slot power supply terminal H-PRO High pressure switch XT2 Communica�on converter board L-PRO Low pressure switch CHI-CH6 Magne�c ring STF1 Four-way valve COMP. Compressor T3 Outdoor heat…

Part 6

Diagnosis and Troubleshoo�ng 1 Error Code Table 46 Part 6 - Diagnosis and Troubleshoo�ng 2 Troubleshoo�ng 47 45

1 Error Code Table

Table 6-1.1: Error code table Error code MDV Atom Series Service Manual Note C0 Communica�on fault between main control board and communicate converter board 12-56 models H0 Communica�on fault between main control board and communicate converter board 60 model E2 Communica�on fault between outdoor…

2 Troubleshoo�ng

2.1 Warning Warning ▪ ▪ All electrical work must be carried out by competent and suitably qualified, cer�fied and accredited professionals and in accordance with all applicable legisla�on (all na�onal, local and other laws, standards, codes, rules, regula�ons and other legisla�on that apply in a…

2.2 C0: Communication fault between main board and communicate converter board (For 12-56 models)

2.2.1 Digital display output MDV Atom Series Service Manual C0 ▪ ▪ ▪ 2.2.2 Descrip�on Communica�on fault between main board and communicate converter board. The system stops running. Error code is displayed on the outdoor unit PCB. ▪ ▪ ▪ 2.2.3 Trigger / recover condi�on Trigger condi�on: Communicate…

2.3 H0: Communica�on fault between main board and communicate converter board (For 60 model)

2.3.1 Digital display output H0 ▪ 2.3.2 Descrip�on Communica�on fault between main board and motor control module. ▪ ▪ ▪ 2.3.3 Trigger / recover condi�on Trigger condi�on: Motor control module and ODU main control board cannot communicate. Recover condi�on: Communica�on go back to normal. Reset…

2.4 E2: Communica�on error between outdoor unit and indoor units (For all models)

2.4.1 Digital display output E2 ▪ ▪ ▪ ▪ ▪ 2.4.3 Trigger / recover condi�on Trigger condition: Indoor units and the outdoor unit cannot communicate for 2 minutes a�er the system is powered on for 20 minutes. Recover condi�on: Communica�on go back to normal. Reset method: Resume automa�cally. ▪ ▪ ▪ ▪…

2.4.5 Procedure

E2 Communica�on wires P Q E have short circuited or disconnected1 Yes Reconnect the communication wires Yes Connect the communica�on wires in a daisy chain Yes Ensure normal power supply Yes Ensure the wires are connected properly Yes Ensure the communica�on wires and high voltage wires are…

2.5 E4: Temperature sensor (T3/T4) fault (For all models)

2.5.1 Digital display output MDV Atom Series Service Manual E4 ▪ ▪ ▪ 2.5.2 Descrip�on Outdoor heat exchanger temperature sensor (T3) error or outdoor ambient temperature sensor (T4) error. The system stops running. Error code is displayed on the outdoor unit PCB. ▪ ▪ ▪ 2.5.3 Trigger / recover…

2.6 E5: Abnormal power supply voltage (For all models)

2.6.1 Digital display output E5 ▪ ▪ ▪ 2.6.3 Trigger / recover condi�on Trigger condi�on: Outdoor unit power supply phase voltage < 165V or > 265V. Recover condi�on: Outdoor unit power supply phase voltage is within 198V ~265V. Reset method: Resume automa�cally. ▪ ▪ ▪ ▪ 2.6.4 Possible causes Outdoor…

2.7 E6: DC fan motor error; Eb: E6 protec�on appears 6 �mes in one hour (For all models)

2.7.1 Digital display output E6 or Eb ▪ ▪ ▪ ▪ MDV Atom Series Service Manual ▪ ▪ ▪ ▪ ▪ 2.7.2 Descrip�on E6:DC fan motor error; Eb: E6 protec�on appears 6 �mes in one hour The system stops running. Error code is displayed on the outdoor unit PCB. 2.7.3 Trigger / recover condi�on Trigger condi�on: For…

2.8 E9: EEPROM error (For all models)

2.8.1 Digital display output E9 ▪ ▪ ▪ 2.8.3 Trigger / recover condi�on Trigger condi�on: Unable to read the EEPROM when startup. Recover condi�on: EEPROM goes back to normal. Reset method: Manually restart. ▪ ▪ 2.8.4 Possible causes The EEPROM is not inserted well Damaged main PCB. Part 6…

2.9 E.9.: Compressor parameters mismatch (For all models)

2.9.1 Digital display output E.9. ▪ ▪ ▪ 2.9.2 Descrip�on Main control chip detect the power set�ng number mismatch the model, the unit will display E.9. error. The system stops running. Error code is displayed on the outdoor unit PCB. ▪ ▪ ▪ 2.9.3 Trigger / recover condi�on Trigger condi�on: Main…

2.10 EF: PFC fault (For all models)

2.10.1 Digital display output EF ▪ ▪ ▪ 2.10.3 Trigger / recover condi�on Trigger condi�on: DC bus voltage is over 450V for con�nue 3 S or over 500V in the first 5 s in PFC star period. Recover condi�on: DC bus voltage is normal in the first 5 s in PFC star period. Reset method: Manually restart. ▪ ▪…

2.11 EH: Refrigerant radiator temperature sensor error (For all models)

2.11.1 Digital display output MDV Atom Series Service Manual EH ▪ ▪ ▪ 2.11.2 Descrip�on Refrigerant radiator temperature TL sensor error. The system stops running. Error code is displayed on outdoor unit PCB. ▪ ▪ ▪ 2.11.3 Trigger / recover condi�on Trigger condi�on: TL temperature sensor is open…

2.12 EP: Outdoor ambient temperature is lower than -15℃ in cooling opera�on (For all models)

2.12.1 Digital display output EP ▪ ▪ ▪ 2.12.2 Descrip�on Outdoor ambient temperature is lower than -15℃ in cooling opera�on. The system stops running. Error code is displayed on outdoor unit PCB. ▪ ▪ ▪ 2.12.3 Trigger / recover condi�on Trigger condi�on: Outdoor ambient temperature is lower than -15℃…

2.13 F1: DC bus voltage protec�on (for all models)

2.13.1 Digital display output F1 ▪ ▪ ▪ ▪ ▪ ▪ 2.13.2 Descrip�on F1 indicates DC bus voltage protec�on. The system stops running. Error code is displayed on the outdoor unit PCB. 2.13.3 Trigger / recover condi�on Trigger condi�on: If IC55 main chip couldn’t receive the DC bus voltage detec�on signal…

2.14 H4: L (L0/L1) fault occurs three �mes in one hour (For all models)

2.14.1 Digital display output H4 ▪ ▪ ▪ 2.14.2 Descrip�on The L (L0/L1) fault occurs three �mes in one hour. The system stops running. Error code is displayed on the unit with the error. ▪ ▪ ▪ 2.14.3 Trigger / recover condi�on Trigger condi�on: The L (L0/L1) fault occurs three �mes in one hour.…

2.15 H7: The number of online indoor units have decreased/increased (For all models)

2.15.1 Digital display output MDV Atom Series Service Manual H7 ▪ ▪ ▪ 2.15.2 Descrip�on The number of online indoor units have decreased/increased. The system stops running. Error code is displayed on the unit with the error. ▪ ▪ ▪ 2.15.3 Trigger / recover condi�on Trigger condi�on: The number of…

2.16 HF: Indoor unit and outdoor unit program mismatch (For all models)

2.16.1 Digital display output HF ▪ ▪ ▪ 2.16.2 Descrip�on Indoor unit and outdoor unit program mismatch. The system stops running. Error code is displayed on the unit with the error. ▪ ▪ ▪ 2.16.3 Trigger / recover condi�on Trigger condi�on: Indoor unit and outdoor unit program mismatch. Recover…

2.17 PL: Radiator surface high temperature protection (For all models)

2.17.1 Digital display output MDV Atom Series Service Manual PL ▪ ▪ ▪ 2.17.2 Descrip�on Radiator surface high temperature protection. The system stops running. Error code is displayed on outdoor unit PCB. ▪ ▪ ▪ 2.17.3 Trigger / recover condi�on Trigger condi�on: Radiator surface temperature TF≥90℃.…

2.18 P1: Discharge pipe high pressure protec�on (For all models)

2.18.1 Digital display output P1 2.18.2 Descrip�on ▪ ▪ ▪ Discharge pipe high pressure protec�on. The system stops running. Error code is displayed on the outdoor unit PCB. 2.18.3 Trigger / recover condi�on ▪ ▪ ▪ Trigger condi�on: Discharge pressure ≥ 4.4MPa. Recover condi�on: Discharge pressure ≤…

2.18.5 Procedure

P1 High pressure sensor connec�on on main Yes Ensure the sensor is connected properly Yes Replace the sensor Yes Discharge part of the refrigerant. Add oil if PCB is loose No High pressure sensor has short-circuited or failed1 No Excess refrigerant2 it leaks during discharge No MDV Atom Series…

2.19 P2: Suc�on pipe low pressure protec�on (For all models)

2.19.1 Digital display output P2 ▪ ▪ ▪ ▪ ▪ ▪ Part 6 - Diagnosis and Troubleshoo�ng ▪ ▪ ▪ ▪ 2.19.2 Descrip�on Suc�on pipe low pressure protec�on. The system stops running. Error code is displayed on outdoor unit PCB. 2.19.3 Trigger / recover condi�on Trigger condi�on: Suc�on pressure ≤ 0.05MPa.…

2.19.5 Procedure

P2 the outdoor ambient temperature is too Yes Stop the unit Yes Ensure the sensor is connected properly Yes Replace the sensor Yes Add refrigerant or inspect the system for low No Low pressure sensor connection on main PCB is loose No Low pressure sensor has short-circuited or failed1 No…

2.17 P3: Compressor current protec�on (For all models)

2.19.6 Digital display output P3 ▪ ▪ ▪ 2.19.7 Descrip�on P3 indicates current protection on compressor. The system stops running. Error code is displayed on the outdoor unit PCB. ▪ ▪ ▪ 2.19.8 Trigger / recover condi�on Trigger condi�on: Current of compressor ≥ C1. Recover condi�on: Current of…

No

The condenser heat exchange is poor4 Yes Inspect the system and fix the error Yes Inspect the system and fix the error Yes Replace the inverter module Yes Replace the compressor No The high pressure side is blocked, caused by crushed or bent pipe or blocked EXV5 No Inverter module has…

2.18 P4: Discharge temperature protection (For all models)

2.18.1 Digital display output P4 2.18.2 Descrip�on ▪ Discharge temperature protec�on. ▪ The system stops running. ▪ Error code is displayed on the unit with the error. 2.18.3 Trigger / recover condi�on ▪ Trigger condi�on: Discharge temperature (T5) > 115oC. ▪ Recover condi�on: Discharge temperature…

2.18.5 Procedure

P4 Discharge pipe temperature sensor and/or discharge temperature switch connec�ons on main PCB are loose Yes Ensure the sensors and switch are connected properly Yes Replace the faulty sensor(s) Yes Add refrigerant and inspect the system for leaks Yes Inspect the system and fix the error. If the…

2.19 P5: Outdoor heat exchanger temperature protec�on (For all models)

2.19.1 Digital display output P5 ▪ ▪ ▪ 2.19.3 Trigger / recover condi�on Trigger condi�on: Outdoor heat exchanger temperature (T3) ≥ 62oC. Recover condi�on: Outdoor heat exchanger temperature (T3) < 52oC. Reset method: Resume automa�cally. ▪ ▪ ▪ ▪ ▪ ▪ 2.19.4 Possible causes Temperature sensor not…

2.19.5 Procedure

P5 Outdoor heat exchanger temperature sensor connec�on on main PCB is loose Yes Ensure the sensor is connected properly Yes Replace the sensor Yes Make sure the combina�on ra�o is less than 130% Yes Flush all refrigerant then vacuum the system and recharge the refrigerant. Add oil to the system if…

2.20 P8: Typhoon protec�on (For all models)

2.20.1 Digital display output P8 ▪ ▪ ▪ 2.20.2 Descrip�on P8 indicates strong wind protec�on. The system stops running. Error code is displayed on the outdoor unit PCB. ▪ ▪ ▪ 2.20.4 Possible causes There is strong wind around the outdoor unit. DC fan motor is damaged. Main PCB damaged. Part 6…

2.21 P9: Poor reversing of four-way valve (For all models)

2.21.1 Digital display output P9 ▪ ▪ ▪ 2.21.3 Trigger / recover condi�on Trigger condi�on: Poor reversing of four-way valve. Recover condi�on: Four-way valve recover to normal . Reset method: Resume automa�cally. ▪ ▪ 2.21.4 Possible causes Four-way valve is damaged. Main PCB damaged. MDV Atom Series…

2.22 PE: Evaporator high temperature protec�on (For all models)

2.22.1 Digital display output PE 2.22.2 Descrip�on ▪ Evaporator high temperature protec�on ▪ The system stops running. ▪ Error code is displayed on the outdoor unit PCB. ▪ ▪ ▪ ▪ ▪ 2.22.4 Possible causes Indoor temperature is too high. Temperature sensor not connected properly or has malfunc�oned.…

2.23 PF: Outdoor Unit Locked

2.23.1 Digital display output PF ▪ 2.23.2 Descrip�on Outdoor unit is locked and cannot be used. ▪ ▪ 2.23.3 Possible causes Outdoor unit is locked and password is not entered to unlock. Main PCB damaged 2.23.4 Procedure PF MDV Atom Series Service Manual Outdoor units whether to enter the password Yes…

2.24.1 Digital display output L0/L1/L2/L3/L4/L5/L7/L8/L9 ▪ ▪ ▪ 2.24.2 Descrip�on Compressor inverter module protec�on. The system stops running. Error code is displayed on the outdoor unit PCB. ▪ ▪ ▪ 2.24.3 Trigger / recover condi�on Trigger condi�on: Inverter module or compressor is abnormal.…

2.24.6 L5: Zero speed protec�on

L5 There is abnormal noise of compressor when startup or running Yes Replace the compressor Yes Reconnect cables based on wiring diagram Yes Replace the compressor No Replace the inverter module 2.24.7 L7: Phase sequence error MDV Atom Series Service Manual L7 Compressor wiring is loose No An open…

L8/L9 Compressor wiring is not properly Yes Reconnect the cables based on wiring diagram No The resistance between 3 phases of compressor is over 5Ω Yes No The insula�on resistance of compressor is less than 100Ω Replace the compressor Yes The compressor has less than 12 hours prehea�ng before…

L1 Voltage of power supply is 166-265V? No Provide normal power supply No Connect again Yes Check the wiring between main control board and filter board is correct or not. Yes Repower on and wai�ng for 10S,and then test the voltage of CN4 port "RL" and "12V" port to check whether their voltage is DC…

2.24.2 Compressor replacement procedure

Step 1: Remove faulty compressor and remove oil ▪ Remove the faulty compressor from the outdoor unit. ▪ Before removing the oil, shake the compressor so as to not allow impuri�es to remain settled at the bottom. ▪ Drain the oil out of the compressor and retain it for inspec�on. Normally the oil can…

2.24.3 Specific error codes for inverter module protec�on

The specific error codes L0, L1, L2, L4, L5, L7, L8 and L9 can also be obtained from the inverter module LED indicators. If an inverter module error has occurred, one of inverter module LED indicators is con�nuously on and the other one of inverter module LED indicators flashes Table 6-2.3: Errors…

Ver. 2023-08

MDV Professional Equipment Midea Group Add.: Midea Headquarters Building, 6 Midea Avenue, Shunde, Foshan, Guangdong, China Postal code: 528311 mbt.midea.com / global.midea.com Note: Product specifica�ons change from �me to �me as product improvements and developments are released and may vary from…

Инструкция на Наружные блоки мини-VRF MDV серии Atom B

Текст инструкции

Новое в каталогах

Новое в инструкциях