Инструкция на Бытовые сплит-системы MDV серии R бренда MDV

R INVERTER SERIES

Service Manual 2012

1. Precaution

1.1 Safety Precaution  To prevent injury to the user or other people and property damage, the following instructions must be followed.  Incorrect operation due to ignoring instruction will cause harm or damage.  Before service the unit, be sure to read this service manual at first. 1.2 Warning …

condenser and evaporator

 For installation, always contact the dealer or an authorized service center.  Do not install the product on a defective installation stand.  Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage…

There is risk of property damage, failure of product, or electric shock

 Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) There is risk of physical injury, electric shock, or product failure.  When the product is soaked, contact an authorized service center. There is risk of fire or…

could cause product malfunction or inefficient operation

 Operational  Do not expose the skin directly to cool air for long time. (Do not sit in the draft).  Do not use the product for special purposes, such as preserving foods, works of art etc. It is a consumer air conditioner, not a precision refrigerant system. There is risk of damage or loss of…

2. Function

Model Names of Indoor/Outdoor Units DC Inverter Capacity Indoor units Outdoor units 9k MSR1i-09HRDN1 MOAi-09HDN1 12k MSR1i-12HRDN1 MOBi-12HDN1 18k MSR1i-18HRDN1 MOC2i-18HDN1 Filter Killer of Formaldehyde Ionizer(O) 8 degree heating(O) Silver Ico Filter(O) Heat compensation(O) Vitamin C Filter(O)…

3. Dimension

3.2 Outdoor Unit

4. Refrigerant Cycle Diagram

INDOOR OUTDOOR CHECK VALVE (Heating Model only) LIQUID SIDE 2-WAY VALVE CAPILIARY TUBE HEAT EXCHANGE (EVAPORATOR) HEAT EXCHANGE (CONDENSER) GAS SIDE REVERSING VALVE (Heating Model only) 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR 8 HEATING

5. Wiring Diagram

5.1 Indoor Unit MSR1i-09HRDN1, MSR1i-12HRDN1 9

5.2 Outdoor Unit

MOAi-09HDN1, MOBi-12HDN1 11

6 Installation Details

6.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque mm inch N.cm N.cm Ф6.35 1/4 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 3/8 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 1/2 3500(357kgf.cm) 3600(367kgf.cm) Ф16 5/8 4500(459kgf.cm) 4700(479kgf.cm) Ф19 3/4…

6.3 Pipe length and the elevation

The pipe length and refrigerant amount: Pipe size Model Standard length (m) Max. Length A (m) Max. Elevation B (m) Additional refrigerant (g/m) Gas Liquid 3/8’’ (Ф9.52) 1/4’’ (Ф6.35) 1/2’’ (Ф12.7) 1/4’’ (Ф6.35) MSR1i-09HRDN1 + MOAi-09HDN1 MSR1i-12HRDN1 + MOBi-12HDN1 MSR1i-18HRDN1 + MOC2i-18HDN1…

6.4 Installation for the first time

Air and moisture in the refrigerant system have undesirable effects as below: ● ● ● ● ● Pressure in the system rises. Operating current rises. Cooling or heating efficiency drops. Moisture in the refrigerant circuit may freeze and block capillary tubing. Water may lead to corrosion of parts in the…

the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum…

Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position. Be sure…

6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the…

6).When the electronic scale displays the proper weight (refer to the gauge and the pressure of the low side), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port…

5). Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa

6). Set the 3-way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts. Use a torque wrench to tighten the 3-way valves service port cap to a torque of 1.8 kgf.m. Be…

Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position Be sure to…

2. Refrigerant charging

Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to…

Use torque wrench to tighten the service port cap to a torque of 18N.m

Be sure to check for gas leakage 23

7. Operation characteristics

Temperature Mode Room temperature Cooling operation Heating operation Drying operation ≥17℃ ≤30℃ ＞10℃ -15℃～34℃ 0℃～50℃ 0℃～50℃ Outdoor temperature -15℃～50℃ (For the models with low temperature cooling system) CAUTION: 1. If air conditioner is used beyond the above conditions, the certain protections…

8. Electronic function

8.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. Auto indicator: This indicator illuminates when…

8.3 Main Protection

8.3.1 Three Minutes Delay at restart for compressor 1 minute delay for the 1st time start-up and 3 minutes delay for others. 8.3.2 Temperature protection of compressor top The unit will stop working when the compressor top temp. protector cut off, and will restart after the compressor top temp.…

If T4＞5℃ or the compressor starts running, the preheating function will stop

8.3.8 Zero crossing detection error protection If AC detects time interval is not correct for continuous 240s, the unit will stop and the LED will display the failure. The correct zero crossing signal time interval should be between 6-13ms. 8.4 Operation Modes and Functions 8.4.1 Fan mode (1)…

If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7

minutes according to the outdoor ambient temp. During the 7 minutes, the frequency limitation is active. 7 minutes later, the compressor running frequency will be controlled as below: 3.5 A 3.0 B 2.5 C 2.0 D 1.5 E 1.0 F 0.5 -0.5 G -1.0 H While Temp. zone A B C D E F G Frequency F8 F8 F7 F6 F5 F3 F1…

Hold: Keep the current frequency

Resume: No limitation for frequency. Note: When AC is in “hold” zone for 3 minutes, the compressor frequency will rise to the higher level.(frequency will increase twice at most) 8.4.2.2 Outdoor fan running rules High 22 20 Low 8.4.2.3 Indoor fan running rules In cooling mode, indoor fan runs all…

---0℃≦T2<4℃, the compressor frequency will be limited and decreased to the lower level

---4℃≤T2≤7℃, the compressor will keep the current frequency. ---T2>7℃, the compressor frequency will not be limited. 8.4.3 Heating Mode 8.4.3.1 Compressor running rules The maximum operation frequency of the compressor after starting submits to the following rule. 34 33 Off 28 27 Fmax=F2 25 24…

H

Off: Compressor stops

Decrease: Decrease the running frequency to the lower level. Hold: Keep the current frequency. Resume: No limitation for frequency. Note: When AC is in “hold” zone for 3 minutes, the compressor frequency will rise to the higher level. (The frequency will increase twice at most) 8.4.3.2 Outdoor fan…

Indoor fan speed can be set as high, medium, low or auto fan and the anti-cold-wind function is

preferential. Auto fan action in heating mode: Low 2.5 2 Medium 1.5 1 High 8.4.3.4 Defrosting mode Condition of defrosting: ----T4＞0℃, When the units are running, if the following two items are satisfied, the units start defrosting: The units run with T3＜3℃ for 40 minutes and T3 keeps lower than…

TCDE1=15℃, TCDE2=8℃for 18k model

Defrosting action： For 9k,12k models: Frequency F2 FrequencyF8 on Compressor 4-way valve Outdoor fan Indoor fan off on off on off on off Indoor fan breeze(10s) 10s xx 10s no longer than 10m While xx=60. 34 30s

For 18k model

Frequency F2 Frequency F8 on Compressor 4-way valve Outdoor fan Indoor fan off on off on off on off Indoor fan breeze(10s) 10s xx 10s no longer than 10m 30s While xx=60s for 18k. 8.4.3.5 Evaporator coil temperature protection ----T2> TEH2℃, the compressor running frequency decreases to the lower…

ΔT=T1-Ts

Running mode ΔT＞1℃ Cooling -1<ΔT≤1℃ Fan-only ΔT≤-1℃ Heating Indoor fan will run at auto fan of the relevant mode. The louver operates same as in relevant mode. If the machine switches mode between heating and cooling, the compressor will keep stopping for 15 minutes and then choose mode according to…

pressing the button once again within 5 seconds, the machine will turn into forced cooling mode

In forced auto, forced cooling or any other operation mode, pressing touch button will turn off the machine. 8.4.6.2 In forced operation mode, all general protections and remote control are available. 8.4.6.3 Operation rules: Forced cooling mode: The compressor runs at F2 frequency and indoor fan…

8.4.8.3 Timer setting is available

8.4.8.4 When user uses timer off function in sleep mode (or sleep function in timer off mode), if the timing is less than 7 hours, sleep function will be cancelled when reaching the setting time. If the timing is more than 7 hours, the machine will not stop until reaches the setting time in sleep…

9. Troubleshooting

9.1 Indoor Unit Error Display Display LED STATUS E0 EEPROM parameter error E1 Indoor unit and outdoor unit communication protection E2 Zero-crossing signal error E3 Indoor fan speed has been out of control Open or short circuit of outdoor temperature sensor or outdoor unit EEPROM E5 parameter error…

9.2 Diagnosis and Solution

9.2.1 EEPROM parameter error diagnosis and solution Shut off the power supply and turn on it 5s later The problem comes out again Is the EEPROM chip plugged in indoor PCB well? Replace the main PCB of indoor unit 40 No Correct the connection

9.2.2 Indoor / outdoor unit’s communication error diagnosis and solution

Power off, then power on the A/C by the breaker.(reconnect the power wire). Is the E1 extinguished? No Check the wiring on the outdoor terminal and indoor terminal follow the wiring diagram. Is all the connecting correctly? Yes No -24V<Vs<+24V? (Vs is the voltage between S and N). Yes Is the wiring…

9.2.3 Indoor fan speed has been out of control diagnosis and solution

Shut off the power supply and turn on it 5s later The unit does not work normally Turn off the unit, rotate the cross fan. Does it rotate freely? Disassemble the connection between the fan and the motor, check if the bearing is normal. If not, change the bearing. If yes, follow the below step. No…

9.2.5 IPM malfunction diagnosis and solution

Check whether the connections between outdoor PCB and IPM are good? Yes YES No Check whether the IPM is fixed to radiator tightly Replace the IPM Fastening the IPM to the radiator The unit does not work normally Replace the compressor 9.2.6 Over voltage or too low voltage protection diagnosis and…

9.2.8 Inverter compressor drive error diagnosis and solution

Is the connection of compressor good? Is the wiring sequence right? The voltage range proper? No Reconnect and retry Yes Replace the outdoor PCB No Replace inverter compressor 9.2.9 Zero crossing detection error diagnosis and solution This is alarm signal when the main chip can’t detect over-zero…

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