Инструкция на Сплит-системы настенного типа MDV серии MDSR бренда MDV

RSEU-A1-1401

SERVICE MANUAL SPLIT WALL-MOUNTED TYPE R ON-OFF SERIES(MDSR/MDOR)

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 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. There is risk of fire, electric shock, explosion, or injury.  Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product.  Be sure the installation area does…

 If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable. There is risk of electric shock or fire.  Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane arrives.…

It can avoid vibration of water leakage

 Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. It may cause a problem for your neighbors.  Use two or more people to lift and transport the product. Avoid personal injury.  Do not install the product where it will be exposed to sea…

operated

There are sharp and moving parts that could cause personal injury.  Do not drink the water drained from the product. It is not sanitary could cause serious health issues.  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.  Replace the all…

2. Function

Filter Killer of Formaldehyde Ionizer(O) Silver Ico Filter(O) Follow me(O) Vitamin C Filter(O) Self-diag. function 3M HAM Filter(O) Anti-rust cabinet Bio Filter(O) Valve protection cover Golden Fin(O) PTC Heating Belt(O) Self Clean(O) Compressor Crankcase Heater(O)

3. Dimension

3.1 Indoor Units Figure Models W H D Figure 1 MDSR-07HRN1 MDSR-09HRN1 Figure 2 MDSR-12HRN1 Figure 3 MDSR-18HRN1 Figure 4 MDSR-24HRN1 MDSR-28HRN1 1036 315 230 L R H Model R(mm) L(mm) H(mm) Dimension of installation hole(mm)

MDSR-07HRN1

111.5 100 45 Φ65 MDSR-09HRN1 83.5 100 45 Φ65 MSDR-12HRN1 Φ65 MDSR-24HRN1 MDSR-28HRN1 Φ65 MDSR-09HRN1 Φ65

3.2 Outdoor Units

MDOR-12HN1

4. Refrigerant Cycle Diagram

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

5. Wiring Diagram

5.1 Indoor Units MSDR-07(09; 12; 18)HN1 MDSR-24(28)HN1

5.2 Outdoor Units

6. Installation details

6.1 Wrench torque sheet for installation Additional Outside diameter Torque tightening torque mm inch Ф6.35 1/4 Ф9.52 3/8 Ф12.7 1/2 Ф15.9 5/8 N.cm N.cm 1500 1600 (153kgf.cm) (163kgf.cm) 2500 2600 (255kgf.cm) (265kgf.cm) 3500 3600 (357kgf.cm) (367kgf.cm) 4500 4700 (459kgf.cm) (479kgf.cm) 6.2…

6.3 Pipe length and the elevation

The pipe length and refrigerant amount: Additional amount of Model Connective pipe length Air purging refrigerant All Less than 5m Use vacuum pump 7k,9k,12k,16k,17k,18k More than 5m Use vacuum pump (Pipe length – 5) × 20g/m 24k,28k More than 5m Use vacuum pump (Pipe length – 5) × 40g/m Standard Max.…

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 18N.m. Be sure…

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…

5). Disconnect the charge hose from the vacuum pump

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…

6). Mounted the valve stem caps and the service port

Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage. 7. Operation characteristics -25 43 with Low Ambient Kit (-v) CAUTION: 1. If air conditioner is used beyond the above conditions, the certain protections may action. 2. Room relative humidity…

8. Electronic function

8.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. Auto indicator: This…

A zone: The current exceeds I3SEC for 5 seconds(3 seconds for 21k model), the compressor and

outdoor fan will shut off. B zone: The current exceeds I5min for 5 minutes, the compressor and outdoor fan will shut off. C zone: The current exceeds IFAN, the outdoor fan will shut off if AC is in heating mode. If AC is in cooling mode, the indoor fan will run at low speed. 8.3.4 Zero crossing…

8.4.2 Cooling Mode

8.4.2.1 Compressor running rules: Once the compressor starts up, it will follow the below rules: When indoor room temp.T1 is lower than Tn, the compressor and outdoor fan will shut off. When T1 is higher than Tm, the compressor and outdoor fan will start up. Tm=Ts+1, Tn=Ts. 8.4.2.2 Outdoor fan…

8.4.2.4 Evaporator low temperature T2 protection

When the evaporator coil temp.T2 keeps lower than TE5 for 5 minutes(4 minutes for 21k model), the compressor and outdoor fan will shut off. When T2 is higher than TE6, the compressor and outdoor fan will restart up. 8.4.2.5 Condenser high temperature T3 protection(only for 21k,24k heat pump models)…

When indoor room temp.T1 is higher than Tj, the compressor and outdoor fan will shut off. When T1 is

lower than Tk, the compressor and outdoor fan will start up. Tj=Ts+Tc Tk=Ts+Tc-1. 8.4.3.2 Outdoor fan running rules: The outdoor units have single fan speed. The outdoor fan will run following the compressor except when AC is in evaporator high temp. protection in heating mode , condenser high temp.…

When T2 is getting lower,

TE4<T2<TE3,the indoor fan will run at low speed. T2<TE4, the indoor fan will shut off. Auto fan action: When T1-Ts>2℃, the indoor fan will run at low speed. When T1-Ts≤0℃, the indoor fan will run at medium speed. 8.4.3.4 High evaporator coil temp.T2 protection: For 24k,28k models:

For other models

℃ Compressor off TE7 Outdoor fan off T2 TE8 TE9 Compressor and Outdoor fan on 8.4.3.5 Defrosting mode： For 7k,9k,12k, models:  Condition of defrosting: AC will enter defrosting mode if any of the following items is satisfied. (1) Both A and B are satisfied A: The compressor keeps running for 40…

About the setting defrosting time

(1) Condition 1 of defrosting; If case B happens before case A and lasts till case A happens, the setting defrosting time is 10 minutes. Otherwise the defrosting time is 7.5 minutes. (2) Condition 2 of defrosting. The defrosting time is 10 minutes. (3) No matter what condition of defrosting is, if…

For 18k models

Condition of defrosting: If any one of following items is satisfied, defrosting will start. Condition 1: Both the following conditions are satisfied: A: If the working time of the compressor accumulates to 42 min and one continuous working time is more than 330s. B: Check the temperature difference…

During the defrosting mode, if the machine stopped or transferred to other mode, the defrosting mode

will stop, and all the defrosting conditions will be cleared. 8.4.4 Auto-mode The machine will choose cooling, heating or fan-only mode according to ΔT (ΔT =T1-Ts). For 7, 9, 12, 18k models: ΔT=T1-Ts Running mode ΔT＞2℃ Cooling -1≤ΔT≤2℃ Fan-only ΔT<-1℃ Heating(for cooling only models, they will run…

For 24 and 28k models

ΔT=T1-Ts Running mode ΔT＞2℃ Cooling -1<ΔT≤2℃ Fan-only ΔT≤-1℃ Heating(for cooling only models, they will run at fan-only mode) AC will run in auto mode in the below cases: （1） Press the forced auto button. （2） If AC is off, it will run in auto mode when timer on function is active. （3） After setting…

Press the touch button continually, the AC will run as below sequence

Forced auto →Forced cooling→ Off Forced cooling mode: The compressor and outdoor fan keep running and the indoor fan runs at low speed. After running for 30 minutes, AC will turn to drying mode(AC will turn to auto mode for 21k,24k models) with 24℃ setting temperature. Forced auto mode: The action…

After pressing ECONOMIC or SLEEP button on controller, the machine will turn into sleep mode

When cooling, the setting temperature rises 1℃(be lower than 30℃) every one hour, 2 hours later the setting temperature stops rising and indoor fan is fixed as low speed. When heating, the setting temperature decreases 1℃(be higher than 17℃) every one hour, 2 hours later the setting temperature…

For some 18k models

Display LED STATUS E1 EEPROM error E2 Zero crossing signal detection error E3 Indoor fan speed has been out of control E4 Over current protection of the compressor occurs 4 times E5 Open circuit or short circuit of room temperature sensor E6 Evaporator temperature sensor open circuit or short…

9.2 Diagnosis and Solution

9.2.1 Indoor fan speed out of control diagnosis and solution Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? No The unit operates normally. Yes Shut off the power supply, rotate the fan by hand. Does it rotate properly? No Find out the cause and have…

9.2.2 The temp. sensor is open circuit or short circuit diagnosis and solution

Check the connections between temperature sensor and main PCB. Are the connections good? No Correct the connections. Yes Replace indoor or outdoor main PCB. Yes Check the resistance value of the sensor via table1 and table 2, is it normal? No Replace the sensor and check if the problem happen again?

9.2.3 Over current protection occurs 4 times diagnosis and solution

Check if the voltage of the power supply is too low? Yes Repair the power supply. Yes Correct the operation condition. No Correct the connection of fan motor or replace the fan motor. Yes Check if the compressor is normal running No Is the outdoor operation temperature too high? Does the outdoor…

9.2.4 EEPROM parameter error diagnosis and solution

Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? Yes If the EEPROM chip is welded on main PCB, replace the main PCB directly. Otherwise, check whether the EEPROM chip plugged in main PCB well? No Correct the connection. Yes Replace the indoor main PCB.…

9.2.6 Indoor / outdoor units communication error diagnosis and solution

Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Yes Check all the wirings between indoor and outdoor, indoor main PCB and outdoor main PCB following the wiring diagram. Are all the wirings connected correctly? Yes…

Main parts check

1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor.…

Model

Compressor

9 / 12 / 18kBTU

LINE(PHASE) INDOOR UNIT OUTDOOR UNIT BLUE(BLACK) TEMPERATURE SENSOR CN2 LOW TEMPERATURE COOLING SYSTEM (N) RED CN1 BLACK (4WAY) BLACK (LOUT) RED (N) BLUE (LIN) 4-WAY TRANSFORMER OVERLOAD RELAY RED RED BLUE(BLACK) BLACK 1 2(N) 3 4 C RED FUSE BLACK C GRAY(RED) C BLACK RED H L BLACK COMPRESSOR R RED…

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