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SERVICE MANUAL
MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL-MOUNTED TYPE
MSG-09HRDN1-QC2(B) MSG-12HRDN1-QC2(B)
V1.0 Nov, 2007
CONTENTS
1. Precaution .................................................................................................................................................... 1
1.1 Safety Precaution ................................................................................................................................................ 1 1.2 Warning ............................................................................................................................................................... 1
2. Function........................................................................................................................................................ 3 3. Dimension .................................................................................................................................................... 5
3.1 Indoor Unit........................................................................................................................................................... 5 MSG-09HRDN1-QC2(B) 3.2 MSG-12HRDN1-QC2(B).................................................................................. 5
Outdoor Unit ........................................................................................................................................................ 6 MOC3-09HDN1-QC2(B) MOC3-12HDN1-QC2(B) .................................................................................. 6
4. Specification ................................................................................................................................................ 7 5. Refrigerant cycle diagram .......................................................................................................................... 8 6. Wiring diagram............................................................................................................................................. 9
6.1 Indoor Unit........................................................................................................................................................... 9 MSG-09HRDN1-QC2(B) 6.2 MSG-12HRDN1-QC2(B) ................................................................................ 9
Outdoor Unit ...................................................................................................................................................... 10 MOC3-09HDN1-QC2(B) MOC3-12HDN1-QC2(B) ............................................................................. 10
7. Installation details.......................................................................................................................................11
7.1 Wrench torque sheet for installation .................................................................................................................. 11 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 Connecting the cables ....................................................................................................................................... 11 Pipe length and the elevation ............................................................................................................................ 11 Air purging of the piping and indoor unit ............................................................................................................ 11 Pumping down (Re-installation)......................................................................................................................... 13 Re-air purging (Re-installation).......................................................................................................................... 14 Balance refrigerant of the 2-way, 3-way valves ................................................................................................. 15 Evacuation......................................................................................................................................................... 16 Gas charging ..................................................................................................................................................... 17
8. Operation characteristics ......................................................................................................................... 18
8.1 8.2 MSG-09HRDN1-QC2(B) ................................................................................................................................... 18 MSG-12HRDN1-QC2(B) ................................................................................................................................... 19
9. Electronic function .................................................................................................................................... 20
9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 9.10 9.11 9.12 Abbreviation....................................................................................................................................................... 20 Display function ................................................................................................................................................. 20 Protection .......................................................................................................................................................... 21 Fan-only Mode............................................................................................................................21 Cooling Mode.............................................................................................................................22 Drying Mode..............................................................................................................................23 Heating Mode.............................................................................................................................23 Auto mode function.....................................................................................................................26 Forced operation function.............................................................................................................26 Action of 4-way valve..................................................................................................................26 Timer function .................................................................................................................................................. 27 Sleep function mode........................................................................................................................................ 27
10. Troubleshooting....................................................................................................................................... 28
10.1 10.2 10.3 Indoor Unit Error Display ................................................................................................................................. 28 Diagnosis and Solution.................................................................................................................................... 28 Key parts checking.....................................................................................................................33
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. product. Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury. Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open. Moisture may condense and wet or damage furniture. Take care to ensure that power cable could not be pulled out or damaged during operation. There is risk of fire or electric shock. Do not place anything on the power cable. There is risk of fire or electric shock. Do not plug or unplug the power supply plug during operation. There is risk of fire or electric shock. Do not touch (operation) the product with wet hands. There is risk of fire or electric shock. Do not place a heater or other appliance near the power cable. There is risk of fire and electric shock. Do not allow water to run into electric parts. It may cause fire, failure of the product, or electric shock. Do not store or use flammable gas or combustible near the product. There is risk of fire or failure of product. Do not use the product in a tightly closed space for a long time. Oxygen deficiency could occur. When flammable gas leaks, turn off the gas and open a window for ventilation before turn the product on. Do not use the telephone or turn switches on or off. There is risk of explosion or fire. 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. There is risk of property damage, failure of product, or electric shock. Do not open the inlet grill of the product during 1
1.2
Warning
Installation
Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit. There is risk of fire or electric shock. For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service center. Do not disassemble or repair the product, there is risk of fire or electric shock. Always ground the product. There is risk of fire or electric shock. Install the panel and the cover of control box securely. There is risk of fire of electric shock. Always install a dedicated circuit and breaker. Improper wiring or installation may cause fore or electric shock. Use the correctly rated breaker of fuse. There is risk of fire or electric shock. Do not modify or extend the power cable. There is risk of fire or electric shock. Do not install, remove, or reinstall the unit by yourself (customer). There is risk of fire, electric shock, explosion, or injury. Be caution when unpacking and installing the product. Sharp edges could cause injury, be especially careful of the case edges and the fins on the 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
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 (flooded or submerged), contact an Authorized service center. There is risk of fire or electric shock. Be caution that water could not enter the product. There is risk of fire, electric shock, or product damage. Ventilate the product from time to time when operating it together with a stove, etc. There is risk of fire or electric shock. Turn the main power off when cleaning or maintaining the product. There is risk of electric shock. When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker. There is risk of product damage or failure, or unintended operation. Take care to ensure that nobody could step on or fall onto the outdoor unit. This could result in personal injury and product damage.
Operational
Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft). This could harm to your health. 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 property. Do not block the inlet or outlet of air flow. It may cause product failure. Use a soft cloth to clean. Do not use harsh detergents, solvents, etc. There is risk of fire, electric shock, or damage to the plastic parts of the product. Do not touch the metal parts of the product when removing the air filter. They are very sharp. There is risk of personal injury. Do not step on pr put anything on the product. (outdoor units) There is risk of personal injury and failure of product. Always insert the filter securely. Clean the filter every two weeks or more often if necessary. A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage. Do not insert hands or other object through air inlet or outlet while the product is 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 batteries in the remote control with new ones of the same type. Do not mix old and mew batteries or different types of batteries. There is risk of fire or explosion. Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire. They may burn of explode. If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote of the batteries have leaked. The chemical in batteries could cause burns or other health hazards
CAUTION
Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant levels may cause failure of product. Install the drain hose to ensure that water is drained away properly. A bad connection may cause water leakage. Keep level even when installing the product. To 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 wind (salt spray) directly. It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.
2
2. Function
Indoor unit
Operation by remote controller
Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance w ith the setting temperature. Anti-freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Restarting is for approx. 3 minutes.. Indoor fan speed control Turbo wind, high, med, low, breeze. Two-direction air vane The unit will decide the louver direction according to operation mode. Work voltage (160V-253V) Tele Remote control (Optional) Ionizer (Optional)
Sleep mode auto control The fan is turn to low speed (cooling/heating). The unit will be turn off at the seventh hour.
Self-diag. function
Anti-cold function Independent dehumidification The function is usually used in rainy days in springtime or damp areas. Air flow Direction control The louver can be set at the desired position or swing up and down automatically Auto-restart function When the power supply is interrupted and then restore, the air conditioners automatically restore the previous function setting. Flexible wiring connection Prevent the cold wind at the beginning of unit start. Auto defrost
Auto mode The mode can be change by the room temperature. Temp. Compensation
3
Outdoor unit
Power relay control The unit has 3 mins delay between continuously ON/OFF operations.
Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly.
Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode.
4 way valve control It is only operated in the heating operation mode except defrosting operation.
Anti-rust cabinet Made from electrolytic zinc steel sheet and anti-rust coated components.
Valve protection cover It protects the valves and prevents water from dripping.
Discharge pipe temperature protect
Heating cable (Optional)
Driving heating at -15
4
3. Dimension
3.1 Indoor Unit
MSG-09HRDN1-QC2(B) MSG-12HRDN1-QC2(B)
5
3.2
Outdoor Unit
MOC3-09HDN1-QC2 MOC3-12HDN1-QC2
6
4. Specification
Indoor Outdoor Power supply Capacity Cooling Input Rated current EER Capacity Heating Input Rated current COP Moisture Removal Max. input consumption Max. current Starting current Model Type Brand Capacity Compressor Input Rated current(RLA) Locked rotor Amp(LRA) Thermal protector Capacitor Refrigerant oil Model Brand Indoor fan motor Input Capacitor Speed(hi/mi/lo) Indoor air flow (Hi/Mi/Lo) Indoor noise level (Hi/Mi/Lo) Dimension (W*H*D) Indoor unit Packing Model Brand Outdoor fan motor Input Capacitor Speed Outdoor air flow Outdoor noise level Dimension(W*H*D) Outdoor unit Refrigerant type R410A Liquid side/ Gas side Refrigerant piping Operation temp Ambient temp Max. refrigerant pipe length Max. difference in level Packing (W*H*D) Net/Gross weight W uF r/min m3/h dB(A) mm mm Kg g mm(inch) m m 38/41 830 6.35/9.53 20 8 17 ~ 30 -15 ~ 50 53 760*590*285 887*655*355 40/43 940 6.35/12.7 20 8 17 ~ 30 -15 ~ 50 (W*H*D) Net/Gross weight W uF r/min m3/h dB(A) mm mm Kg 1250/1000/850 500/420/350 39/34/29 750*250*196 830*335*280 7.5/9.5 YDK24-6E Welling 56 2.5 800 1700 54 uF ml Btu/h W A A Ph-V-Hz Btu/h W A Btu/w.h, w/w Btu/h W A W/W L/h W A A MSG-09HRDN1-QC2(B) MOC3-09HDN1-QC2 1,220-240V~,50Hz 8500(2250~11000) 770(180~1150) 3.4(0.9~5.0) 11.0,3.24 9000(2300~12000) 730(170~1050) 3.3(0.8~4.8) 3.61 0.9 1500 8 5.2 DA89X1C-23FZ Rotary TOSHIBA 9040 680 4.7 10 CS-74 NO 370 RPG13H Welling 36.5 1.2 1280/1100/900 550/450/350 41/36/30 MSG-12HRDN1-QC2(B) MOC3-12HDN1-QC2 1, 220-240V~, 50Hz 11000(2450~13500) 1000(210~1380) 4.4(1.0~6.2) 11.0,3.22 12000(2700~15500) 970(200~1350) 4.2(1.0~6.0) 3.63 1.1 1900 10 6.6
The above design and specifications are subject to change without prior notice for product improvement.
7
5. Refrigerant cycle diagram
8
6. Wiring diagram
6.1 Indoor Unit
MSG-09HRDN1-QC2(B) MSG-12HRDN1-QC2(B)
9
6.2
Outdoor Unit
MOC3-12HDN1-QC2
MOC3-09HDN1-QC2
10
7. Installation details
7.1 Wrench torque sheet for installation
Outside diameter mm 6.35 9.52 12.7 inch 1/4 3/8 1/2 Torque Kgf·m 1.8 4.2 5.5
7.2
Connecting the cables
The power cord of connect should be selected according to the following specifications sheet. Unit mm
2
9K 1.5
12K 1.5
7.3
Pipe length and the elevation
Capacity Btu/h 9k 12k Gas 3/8'' (9.52) 1/2'' (12.7) Pipe size Liquid 1/4'' (6.35) 1/4'' (6.35) Standard length (m) 5 5 Max. Elevation B (m) 8 8 Max. Elevation A (m) 20 20 Additional refrigerant (g/m) 30 30
Caution: Capacity is base on standard length and maximum allowance length is base of reliability. Oil trap should be installed per 5-7 meters.
7.4
Air purging of the piping and indoor unit
Required tools: Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector. Note: The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit. Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it prevents the gas 11
leakage from the refrigeration cycle.
Procedure 1. Recheck the piping connections. 2. Open the valve stem of the 2-way valve counterclockwise approximately 90', wait 10 seconds, and then set it to closed position. Be sure to use a hexagonal wrench to operate the valve stem. 3. Check for gas leakage. Check the flare connection for gas leakage 4. Purge the air from the system. Set the 2-way valve to the open position and remove the cap from the 3-way valve's service port. Using the hexagonal wrench to press the valve core pin, discharge for three seconds and then wait for one minute. 5. Use torque wrench to tighten the service port cap to a torque of 1.8 kgf.m. (18n.m) 6. Set the 3-way valve to the opened position. 7. Mounted the valve stem nuts to the 2-way and 3-way valves.
Caution: If gas leakage is discovered in step (3) above, take the following measures. If the leaks stop when the piping connections are tightened further, continue working from step (4). If the gas leaks do not stop when the connections are retightened, repair the location of the leak, discharge all of the gas through the service port, and then recharge with the specified amount of gas from a gas cylinder.
8. Check for gas leakage. At this time, especially check for gas leakage from the 2-way and 3-way stem nuts, and from the service port.
12
7.5
Pumping down (Re-installation)
Procedure 1. Confirm that both the 2-way and 3-way valves are set to the opened position. Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems. 2. Operate the unit for 10 to 15 minutes. 3. Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-way valve. Connect the charge hose with the push pin to the gas service port. 5. Air purging of the charge hose. Open the low-pressure valve on the charge set slightly to purge air from the charge hose. 6. Set the 2-way valve to the close position. 7. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa. 8. Immediately set the 3-way valve to the closed position. Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and amount the 2-way and 3-way valve's stem nuts and service port caps. Use a torque wrench to tighten the service port cap to a torque of 1.8 kgf.m. Be sure to check for gas leakage.
13
7.6
Re-air purging (Re-installation)
Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the closed position. 2. Connect the charge set and a charging cylinder to the service port of the 3-way valve. Leave the valve on the charging cylinder closed. 3. Air purging. Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on the 2-way valve approximately 45' for 3 seconds then closing it for 1 minute; repeat 3 times. After purging the air, use a torque wrench to tighten the flare nut to on the 2-way valve. 4. Check the gas leakage. Check the flare connections for gas leakage. 5. Discharge the refrigerant. Close the valve on the charging cylinder and discharge the refrigerant 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 use a hexagonal wrench to operate the valve stems. 7. Mount the valve stems nuts and the service port cap. Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m. Be sure to check the gas leakage.
14
7.7
Balance refrigerant of the 2-way, 3-way valves
Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the open position. 2. Connect the charge set to the 3-way valve's service port. Leave the valve on the charge set closed. Connect the charge hose with the push pin to the service port. 3. Open the valves (Low side) on the charge set and discharge the refrigerant until the gauge indicates 0.05 to 0.1Mpa. If there is no air in the refrigeration cycle [the pressure when the air conditioner is not running is higher than 0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to 0.1 Mpa. If this is the case, it will not be necessary to apply a evacuation. Discharge the refrigeration gradually; if it is discharged too suddenly, the refrigeration oil sill be discharged.
15
7.8
Evacuation
Procedure: 1. Connect the vacuum pump to the charge set's centre hose. 2. Evacuation for approximately one hour. Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less]. 3. Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump). 4. Disconnect the charge hose from the vacuum pump. Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as needle.
16
7.9
Gas charging
Procedure: 1. Connect the charge hose to the charging cylinder. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. 2. Purge the air from the charge hose. Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant). 3. Open the valves (Low side) on the charge set and charge the system with liquid refrigerant. If the system cannot be charge with the specified amount of refrigerant, if can be charged with a little at a time (approximately 150g each time0 while operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure.(pumping down-pin). 4. Immediately disconnect the charge hose from the 3-way valve's service port. Stopping partway will allow the refrigerant to be discharged. If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air conditioner before disconnecting the hose. 5. 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.
17
8. Operation characteristics
8.1 MSG-09HRDN1-QC2
Cooling Characteristics
2.70 Cooling Capacity(KW) Cooling Power Input(KW) Cooling Capacity(KW) 2.60 2.50 2.40 2.30 2.20
Piping Length Characteristics (Cooling)
2.55 2.50 2.50 2.45 2.40 2.35 2.30 2.25
0.79 Cooling Power Input(KW) 0.78 0.77 0.76 0.75 0.74 0.73 25 27 29 31 33 35 37 39 41 43
0.77 0.76 0.75 0.74 0.73 0.72 0.71 5 6 7 8 9 10 11 12 13 14 15
Outdoor Ambient Temperature() Remark: Indoor room temperature: 27/19 Indoor fan speed: High Pipe length: 5m
Piping Length (m) Remark: Indoor room temperature: 27/19 Outdoor temperature: 35 Indoor fan speed: High
Heating Characteristics
Piping Length Characteristics (Heating)
2.8
Heating Capacity(KW)
2.8 2.7 2.6 2.5 2.4 2.3 2.2
Heating Capacity(KW) Heating Power Input(KW)
2.7 2.6 2.5 2.4 2.3 2.2 2.1
0.78 Heating Power Input(KW) 0.76 0.74 0.72 0.70 0.68 0.66 -7 -5 -3 -1 1 3 5 7 9 11
0.75 0.73 0.71 0.69 0.67 0.65 0.63 5 6 7 8 9 10 11 12 13 14 15
Outdoor Ambient Temperature() Remark: Indoor room temperature: 20 Indoor fan speed: High Pipe length: 5m
Piping Length (m) Remark: Indoor room temperature: 20 Outdoor temperature: 7/6 Indoor fan speed: High
18
8.2
MSG-12HRDN1-QC2
Cooling Characteristics
3.4 Cooling Capacity(KW) Cooling Power Input(KW) Cooling Capacity(KW) 3.3 3.2 3.1 3.0 2.9 2.8 2.7
Piping Length Characteristics (Cooling)
3.20 3.12 3.04 2.96 2.88 2.80 2.72 2.64
1.08 Cooling Power Input(KW) 1.04 1.00 0.96 0.92 0.88 0.84 25 27 29 31 33 35 37 39 41 43
0.99 0.96 0.93 0.90 0.87 0.84 0.81 5 6 7 8 9 10 11 12 13 14 15
Outdoor Ambient Temperature () Remark: Indoor room temperature: 27/19 Indoor fan speed: High Pipe length: 5m
Piping Length (m) Remark: Indoor room temperature: 27/19 Outdoor temperature: 35 Indoor fan speed: High
Heating Characteristics
3.6 Heating Capacity(KW) 3.5 3.4 3.3 3.2 3.1 3.0 2.9 Heating Capacity(KW) Heating Power Input(KW)
Piping Length Characteristics (Heating)
3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8
1.01 Heating Power Input(KW) 0.99 0.97 0.95 0.93 0.91 0.89 -7 -5 -3 -1 1 3 5 7 9 11
0.98 0.97 0.96 0.95 0.94 0.93 0.92 5 6 7 8 9 10 11 12 13 14 15
Outdoor Ambient Temperature () Remark: Indoor room temperature: 20 Indoor fan speed: High Pipe length: 5m
Piping Length (m) Remark: Indoor room temperature: 20 Outdoor temperature: 7/6 Indoor fan speed: High
19
9. Electronic function
9.1 Abbreviation
T1: T2: T3: T4: Indoor ambient temperature Pipe temperature of indoor heat exchanger Pipe temperature of outdoor heat exchanger Outdoor ambient temperature
9.2
9.2.1
Display function
Icon explanation on indoor display board.
MSG-09HRDN1-QC2(B) Auto indicator
MSG-12HRDN1-QC2(B)
This indicator illuminates when the air conditioner is in AUTO operation. Timer indicator This indicator illuminates when TIMER is set ON/OFF. PRE.-DEF. Indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode. OPERATION indicator This indicator illuminates when the air conditioner is running. ECON indicator This indicator illuminates when the air conditioner is running in economic/sleep mode. LED display control function. Pressing "LED display" button on remote controller will turn off all displays on indoor unit, while pressing once again, all displays will resume.
9.2.2
20
9.3
9.3.1 9.3.2 9.3.3
Protection
Three Minutes Delay at restart for compressor. Temperature protection of compressor top. If the temperature of compressor top is too high(higher than 120 and the Over-load Protector is cut, the units stop. When the Over-load Protector restore and close(lower than 100), the compressor will restart( in this case the compressor is restricted by Three Minutes Delay protection.
9.3.4
Temperature protection of compressor exhaust. If the exhaust temp. of compressor is higher than 115 and lasts for 5 seconds, the compressor stops and does not resume until the exhaust temp. is lower than 90.
9.3.5
Inverter module Protection, Inverter module Protection itself has a protection function against current, voltage and temperature. If these protections happened, the corresponding code will display on indoor unit LED.
9.3.6 9.3.7
Sensor protection at open circuit and breaking disconnection Fan Speed is out of control. When Indoor Fan Speed is too low (lower than 300RPM for 60 seconds), the unit stops and LED displays failure information and can't return to normal operation automatically.
9.3.8
Cross Zero signal error warning. If there are 20 alternations of Cross Zero signals are incorrect, the unit stops and LED displays failure information. After resuming, the motor rotates again. The spacing of Cross Zero signal is 6-13ms.
9.3.9
Indoor fan delayed open function
9.3.10 For all modes, when the units are turned on, the indoor fan can operate 10 seconds after the action of louver. 9.3.11 Compressor preheating function. 1) Preheating permitting condition: If T4(outdoor ambient temperature)3 and the machine connects to power supply newly or if T43 and compressor has stopped for over 3 hours, the compressor heating cable will work. 2) Preheating mode: A weak current flows through the coil of compressor from the wiring terminal of compressor, then the compressor is heated without operation. 3) Preheating release condition: If T45 or user turns on the machine and compressor runs, preheating function will stop. 9.3.12 Compressor heating cable If outdoor temperature(sensed by outdoor thermostat) is lower than 5, the thermostat closes and compressor heating cable begins to work. If outdoor temperature is higher than 15, the thermostat opens and compressor heating cable stopping working.
9.4
9.4.1 9.4.2 9.4.3
Fan-Only Mode
Temperature setting function is disabled, and no setting temperature display. In this mode, the action of louver is the same as in cooling mode. The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24 setting temperature.
3.5 T1 24 3.0 1.5 1.0 low medium high
21
9.5
Cooling Mode
9.5.1 The After start the operation frequency of compressor submits to following rule.
T=(room temp) (setting Temp) A 3.5 3.0 B
-0.5 -1.0 H
When the machine is running and T(=room temp. setting temp.) changes, the frequency of compressor will rise or descend a grade (7 minutes after starting). After start, if T stays in a zone for 3 minutes, the frequency will change as follow: Zone A : Current frequency rise a grade till the maximum grade. Zone B: Elevate or keep or descend the frequency of compressor. Zone H: Compressor stops after running as the minimum frequency for 60 minutes or T is less than -2. 9.5.4 Indoor heat exchanger anti-freezing function. If T2 is lower than 0, the compressor stops and resumes when T2>5. 9.5.5 Outdoor unit current control in cooling mode(refer to the parameter table)
comp. pause I3COOL outdoor unit current
I2COOL
freq. descends if curr. rises; freq. remains if curr. descends
I1COOL running normally
Remark: I1COOL 9K Model 12K Model 5.0 A 5.0 A I2COOL 6.0 A 6.0 A I3COOL 7.0 A 7.0 A
9.5.6
Rating capacity test function 1) Set the indoor unit with remote controller as: high fan, 17 in cooling mode, then press "TURBO" button on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity test mode, the buzzer will make a "di" sound for 2 seconds continuously. Also, indoor fan will change to rating speed, the frequency of compressor will be fixed as rating value. Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode. 2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature.
9.5.7
Turbo function(press the "TURBO" button on remote controller) 1) 2) 3) Elevate current frequency to a higher grade. Indoor fan turns to turbo speed. After running for 30 minutes the machine will turn back to previous setting mode. 22
9.5.8
Indoor fan operation rule. 1) In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto. 2) Auto fan in cooling mode acts as follow:
T=(oom temp) (setting Temp) 4.0 3.0 1.5 1.0 low medium high
9.5.9
Condenser high temperature protection function(in cooling and drying mode) If T360 for 5 seconds, compressor will stop immediately, and the machine will not resume until T352.
9.6
9.6.1
Drying mode
Indoor fan speed is fixed at breeze grade and can't be changed. The horizontal angle is the same as in cooling mode.
9.6.4
Room overlow temperature protection In drying mode, if room temperature is lower than 10, compressor will stop and not resume until room temperature climbs up to 12.
9.6.5
Evaporator anti-freezing protection, condenser high temperature protection and outdoor unit frequency limit are valid, and they are the same as that in cooling mode.
9.6.6
Horizontal louver action is the same as that in cooling mode.
9.7
9.7.1
Heating mode
Indoor fan action: 1) Anti-cold-wind function.
44 38 Evaporator temp 37 34 33 breeze 24 17 fan stop super breeze low fan setting fan speed
2)
If the compressor stops caused by room temperature rising, indoor fan will be forced to run 127 seconds with breeze. During this period, anti-cold-wind is disabled. After this, anti-cold wind function is available.
3)
If the machine runs in rating capacity test mode, indoor fan runs with rating speed, and anti-cold-wind is 23
disabled. 9.7.2 Indoor fan speed can be set as high, medium, low or auto grade,but anti-cold-wind function is preferential. Auto fan action in heating mode.
T=(oom temp) (setting Temp) 2.5 2.0 1.5 1.0 high medium low
9.7.3
After start the operation frequency of compressor submits to following rule:
Th=(room temp) (setting Temp) Tcon
5.0 4.5 B H
1.0 0.5
A
Remark: Tcon can be changed among 0, -2,- 4, the default is 0
1) When the machine runs, if Th stays in a zone for 3 minutes, action of frequency is as follow: Zone A: Zone B: Zone H: Elevate current frequency one grade, and not stop until the maximum grade. Elevate or keep or descend current frequency. Compressor stops after running with F1 for 60 minutes or when Th6.
2) Temperature difference (Tcon) choice. After power on, the machine will self-diagnose, and if there are no J1 and J2 jump wires, Tcon will be set as 0.
J1 J2 Tcon()
on on 0
on off -4
off on -2
off off 0
9.74
Outdoor unit current control in heating mode.
comp. pause I3HEAT outdoor unit current
I2HEAT
freq. descends if curr. rises; freq. remains if curr. descends
I1HEAT running normally
Remark: 24
I1HEAT 9K Model 12K Model 5.6 A 5.6 A
I2 HEAT 6.6 A 6.6 A
I3 HEAT 7.6 A 7.6 A
9.7.5
Indoor heat exchanger high temperature protection. If T260, the compressor will stop and not resume until T248.
9.7.6
Defrosting mode. 1) Condition of defrosting. If T40, When the units are running, if the following two items are satisfied the units start defrosting: a) The units runs with T33 for 40 minutes and T3 keeps lower than -6 for more than 3 minutes. b) The units runs with T33 for 80 minutes and T3 keeps lower than -4 for more than 3 minutes. Condition 2: If T40,
Condition 1:
The program judges according to the condition 1, if the two items are satisfied, then judges if T2 has descended for more than 5, if it has the machine starts defrosting, or continues to judge T2 and will not defrost until T2 drops more than 5. Condition 3: No matter what value T4 is, if the machine runs with T33 for more than 120 minutes and T3
keeps lower than -2 for more than 3 minutes, the machine will defrost, no matter if T2 drops for more than 5 or not. 2) Condition of ending defrosting. If any one of following items is satisfied, defrosting will finish and the machine will turn to normal heating mode. a) b) c) 9.7.7 T3 rises to be higher than 12. T3 rises to be higher than 8 and remains for 80 seconds. The machine has run for 10 minutes in defrosting.
Defrosting action.
F8 on compressor off on 4-way valve off on outdoor fan off on off
indoor fan
indoor fan breeze 10s 60s 70s no longer than 10 minutes 30s
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9.7.8
Rating capacity test function. 1) Set the indoor unit with remote controller as: high fan, 30 in heating mode, then press "TURBO" button on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity test mode, the buzzer will make a "di" sound for 2 seconds continuously. Also, indoor fan will change to rating speed, the frequency of compressor will be fixed as rating value. Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode. 2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature.
9.7.9 Turbo function in heating mode. (press the "TURBO" button on remote controller) 1) Elevate current frequency(excluding F8) to a higher grade. If indoor fan is in low speed or pause caused by defrosting or anti-cold-wind function, frequency of compressor will not be elevated one grade until these limit has been released. 2) 3) Indoor fan changes to turbo speed and anti-cold-wind function is valid. After running for 30 minutes the machine will turn back to previous setting mode.
9.8
9.8.1
Auto mode function
This mode can be chosen with remote controller and the setting temperature can be changed between 17~30. In auto mode, the machine will choose cooling, heating or fan-only mode according to T(T =T1-Ts). T=T1-Ts T1 -1T1 T-1 Running mode Cooling Heating Fan-only
9.8.2 9.8.3
Indoor fan will choose auto speed of relevant mode. If the machine switches mode between heating and cooling, compressor will keep stopping for 15 minutes and then rechoose mode according to T.
9.8.4
If the setting temperature is modified, the machine will rechoose running function.
9.9
9.9.1
Forced operation function
Forced cooling and auto function can carry out with a touch button. In these two modes, the machine can be changed by remote controller to any other mode at any moment.
9.9.2 When the machine is off, pressing the touch button will carry the machine to forced auto mode, after this, if 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. In forced operaton, remote control is available. 9.9.3 9.9.4 In forced operation mode, all general protections is available. In forced cooling mode, after running for 30 minutes. the machine will turn to normal auto mode which setting temperature is 24. 9.9.5 The action of forced auto mode is the same as normal auto mode which temperature is 24.
9.10
Action of 4-way valve
In cooling, drying, fan-only or turning off mode, 4-way valve is off, while in heating mode 4-way valve is on. If the machine changes operation mode from heating mode to some other mode, 4-way valve will be delayed off 2 minutes after compressor stop. For defrosting, please refer to the passage "defrosting mode".
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9.11
9.11.1 9.11.2 9.11.3 9.11.4
Timer function
Timing range is 24 hours, and the minimum resolution is 15 minutes. Timer on. Timer off. After turning off, the machine will turn on automatically when reaching the setting time. After turning on, the machine will turn off automatically when reaching the setting time. After turning off, the machine will turn on automatically when reaching the setting "on" time, and
Timer on/off.
then turn off automatically when reaching the setting "off" time. 9.11.5 Timer off/on. After turning on, the machine will turn off automatically when reaching the setting "off" time, and
then turn on automatically when reaching the setting "on" time. 9.11.6 The tolerance of timer is 1 minute per hour.
9.12
9.12.1
Sleep function mode
Operation time in sleep mode is 7 hours. After 7 hours the machine quits this mode and turns off.
9.12.2 In cooling, heating or auto mode sleep function is available. 9.12.3 1) 2) Operation process in sleep mode is as follow: 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 hour later the rising stops and indoor fan is fixed as low speed. 3) When heating, the setting temperature descends 1(be lower than 30) every one hour, 2 hour later the descending stops and indoor fan is fixed as low speed, and anti-cold-wind is available. 9.12.4 If user uses timer on function in sleep mode, sleep function will pause and not resume until reaches the setting on time. 9.12.5 When user uses timer off function in sleep mode(or sleep function in timer off mode), if the timing time is less than 7 hours, sleep function will be cancelled when reaching the setting time. If the timing time is more than 7 hours, the machine will not stop until reaches the setting off time in sleep mode.
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10. Troubleshooting
10.1 Indoor Unit Error Display
LED3 DEFR × × × × LED2 TIMER × × × × LED1 AUTO × × × LED0 OPER × Module Protection Temp Protection of Top Compressor Outdoor Ambient Sensor Open or Short Circuit Voltage Too High or Too Low Room Sensor Open or Short Circuit Indoor Fan Speed Out of Control Zero-Cross Signal Error EEPROM Error Communication Protection Between Indoor & Outdoor Units Rotor Position Error --Blink Explanation
--Bright
×--Extinguished
10.2
10.2.1
Diagnosis and Solution
LED3 DEFR × LED2 TIMER × LED1 AUTO LED0 OPER Module Protection
Explanation
NO
Is voltage normal?
Revise the power and retest.
YES
Is all connection good?
NO
Revise the power and retest.
YES
Is the wiring to compressor right?
YES
Check the module if some components blow out or be failure?
YES
Repair or replace the module.
YES
Is it breakdown between P-N, P-V, P-W, N-V,N-W or V-W of inverter module?
YES
Replace the module.
YES
Check the compressor.
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10.2.2 LED3 DEFR LED2 TIMER × LED1 AUTO × NO LED0 OPER Explanation Temp Protection of Top Compressor NO
Reconnect and retest.
Does compressor operate?
Is the connection good?
YES
Is refrigerant circulation volume normal?
YES
Is protector normal?
NO
Replace the protector.
NO
Charge refrigerant
YES
Check the outdoor main PCB. Is there some problem?
YES
Is abnormality the same after gas charging? Replace the outdoor PCB.
NO
Check refrigerant system (such as clogging of capillary, etc)
10.2.3 LED3 DEFR × LED2 TIMER LED1 AUTO × LED0 OPER Explanation Outdoor Ambient Sensor Open or Short Circuit
Is the outdoor temperature sensor connector and connection good? YES Replace the sensor and check if E5 display again?
NO
Repair the connector and reconnect
YES
Replace outdoor e-box
10.2.4 LED3 DEFR × LED2 TIMER LED1 AUTO LED0 OPER Explanation Voltage Too High or Too Low
NO Be sure the power supply is normal when using the units
Is the power supply good? YES
Replace the outdoor e-box.
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10.2.5 LED3 DEFR LED2 TIMER LED1 AUTO LED0 OPER Explanation Room Sensor Open or Short Circuit
Is the indoor temperature and evaporator sensor connector and connection good?
NO
Repair the connector and reconnect
YES Replace the sensor and check if E6 display again? YES
Replace the.indoor PCB
10.2.6 LED3 DEFR LED2 TIMER LED1 AUTO LED0 OPER Explanation Indoor Fan Speed Out of Control
Is the indoor fan motor connector and connection good? YES Is voltage being applied to the fan motor? (rang 90v-160v between mid pin and N on CN1
NO
Repair the connector and reconnect
YES
Indoor PCB is defective. Replace the indoor PCB.
NO Replace the indoor fan motor
10.2.7 LED3 DEFR LED2 TIMER × LED1 AUTO LED0 OPER Zero-Cross Signal Error Explanation
Is power supply and connection of connectors good? YES
NO
Be sure the power supply is good and correct the connection
Indoor PCB is defective. Replace the indoor PCB.
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10.2.8 LED3 DEFR LED2 TIMER LED1 AUTO LED0 OPER EEPROM Error Explanation
Circuit or software error on indoor PCB
Replace indoor PCB
10.2.9 LED3 DEFR LED2 TIMER LED1 AUTO LED0 OPER Explanation Communication Protection Between Indoor & Outdoor Units
Disconnect the power supply, after 1 minute, connect the power supply, turn on the unit with remote controller
Does the unit work normally?
NO Check the wiring between indoor and outdoor unit. Is the connection of L, N, S and GND good? Is the GND connection on outdoor PCB good? Yes Is the LED4(red) on outdoor PCB bright and LED1(yellow) blinking? No The power supply for outdoor PCB is fail. Check the wiring on outdoor PCB comparing with wiring plate. Is the connection good? No Replace outdoor e-box. Yes Replace indoor PCB and repower on. Is the failure cleared?
NO
Reconnect and retest again
Yes
Correct the connection.
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10.2.10 LED3 DEFR × LED2 TIMER × LED1 AUTO × LED0 OPER × Rotor Position Error Explanation
Are the U,V,W connected to compressor and inverter module right? And signal feedback wires connection good?
NO
Reconnect and retry
YES
Replace the outdoor main PCB. Does the problem remain?
YES
Replace the inverter module. Does the problem remain?
YES
check coil resistance of inverter compressor, is it 0.64ohm?
NO
Replace inverter compressor
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10.3
Key parts checking.
Measure the resistance value of each winding by using the multi-meter.
10.3.1. Compressor checking (Model: DA89X1C-23FZ).
Position Blue - Red Blue - Black Red - Blue
Resistance Value 1.10 (20)
10.3.2
Outdoor Fan Motor (Model: YDK24-6E). Measure the resistance value of each winding by using the multi-meter.
Position Black - Red Blue - Black
Resistance Value 345 ±8% (20) 180 ±8% (20)
10.3.3 Indoor Fan Motor (Model: RPG13H). Measure the resistance value of each winding by using the multi-meter.
Position Black - Red White - Black
Resistance Value 445 ±8% (20) 405 ±8% (20)
10.3.4
Step Motor (Model: MP2835). Measure the resistance value of each winding by using the multi-meter.
Position Blue - Red Pink - Orange Pink - Yellow Yellow - Red
Resistance Value
200 ±7%
(25)
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10.3.5
Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor exhaust temp.(Te) sensor. Measure the resistance value of each winding by using the multi-meter.
Some frequently-used R-T data for T1,T2,T3 and T4 sensor: Temperature () Resistance Value (K ) 5 26.9 10 20.7 15 16.1 20 12.6 25 10 30 8 40 5.2 50 3.5 60 2.4
Some frequently-used R-T data for Te sensor: Temperature () Resistance Value (K ) 5 141.6 15 88 25 56.1 35 36.6 60 13.8 70 9.7 80 6.9 90 5 100 3.7
K
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