Related Manuals for Toyotomi Kuro MTN A228DV
Summary of Contents for Toyotomi Kuro MTN A228DV
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Page 1: Service Manual
SERVICE MANUAL DC INVERTER SPLIT WALL-MOUNTED TYPE AIR CONDITIONER MTN/MTG A228DV MTN/MTG A235DV V1.0 2009... -
Page 2: Table Of Contents
CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution ..............................1 1.2 Warning ................................1 2. Function ..............................3 3. Dimension ..............................5 3.1 Indoor Unit ................................5 3.2 Outdoor Unit ................................ 6 4. Specification ............................. 7 5. Refrigerant cycle diagram ........................8 6. - Page 3 10.2 Diagnosis and Solution ............................ 32 10.3 Key parts checking............................35...
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Page 4: Precaution
1. Precaution defective installation stand. 1.1 Safety Precaution It may cause injury, accident, or damage to the product. To prevent injury to the user or other Be sure the installation area does not people and property damage, the following instructions deteriorate with age. - Page 5 electric shock. Operational Do not open the inlet grill of the product during operation. (Do not touch the Do not expose the skin directly to cool electrostatic filter, if the unit is so equipped.) air for long periods of time. (Do not sit in the draft). There is risk of physical injury, electric shock, or product This could harm to your health.
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Page 6: Function
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. - Page 7 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.
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Page 8: Dimension
3. Dimension 3.1 Indoor Unit MTN A228DV MTN A235DV Dimension Mode... -
Page 9: Outdoor Unit
3.2 Outdoor Unit MTG A228 DV MTG A235 DV... -
Page 10: Specification
4. Specification Sale model MTN/MTG A228DV MTN/MTG A235DV Power supply V-Ph-Hz 1Ph, 220-240V～, 50Hz 1Ph, 220-240V～, 50Hz Capacity Btu/h 9000(3100~11200) 12000(3800~14700) Power consumption 660(300~1100) 970(400~1480) Cooling Operating current 2.9(1.3~4.8) 4.3(1.8~6.5) 4.01 3.61 Capacity Btu/h 10000(3300~12300) 13000(4000~15200) Power consumption 690(310~1150) 950(390~1460) Heating Operating current 3.0(1.4~5.0) -
Page 11: Refrigerant Cycle Diagram
5. Refrigerant cycle diagram... -
Page 12: Wiring Diagram
6. Wiring diagram 6.1 Indoor Unit MTN A228DV MTN A235DV S W IN G M O TO R 202032390830 ( I ND OO R UN I T) IN D O O R M O T O R B R O W N (O R B L A C K ) Y /G (O R G R E E N ) 3 2 1 1 2 3 4 5... -
Page 13: Outdoor Unit
6.2 Outdoor Unit MTG A228DV MTG A235DV... -
Page 14: Installation Details
7. Installation details 7.1 Wrench torque sheet for installation Outside diameter Torque inch Kgf.m Ф6.35 Ф9.52 Ф12.7 7.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit 7.3 Pipe length and the elevation Pipe size Standard Max. - Page 15 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 leakage from the refrigeration cycle. Procedure service port.
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Page 16: Pumping Down (Re-Installation)
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. -
Page 17: Re-Air Purging (Re-Installation)
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. -
Page 18: Balance Refrigerant Of The 2-Way, 3-Way Valves
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. -
Page 19: Evacuation
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). -
Page 20: Gas Charging
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). -
Page 21: Operation Characteristics
8. Operation characteristics 8.1 MTN/MTG A228DV Piping Length Characteristics (Cooling) Cooling Characteristics 2.70 2.75 2.65 2.70 2.60 2.65 2.55 2.60 2.50 2.55 2.45 2.50 2.40 2.45 0.64 0.70 0.62 0.68 0.60 0.64 0.58 0.62 0.56 0.60 0.54 0.58 0.56 0.52 10 11 12 13 14 25 27 29 31 33 35 37 39 41 43... -
Page 22: Mtn/Mtg A235Dv
8.2 MTN/MTG A235 DV Piping Length Characteristics (Cooling) Cooling Characteristics 3.25 3.20 3.15 3.10 3.05 3.00 2.95 2.90 0.84 0.92 0.80 0.88 0.76 0.84 0.72 0.80 0.68 0.76 0.64 0.72 0.68 0.60 10 11 12 13 14 25 27 29 31 33 35 37 39 41 43 Piping Length (m) Outdoor Ambient Temperature (℃) -
Page 23: Electronic Function
9. Electronic function 9.1 Abbreviation T1: Indoor ambient temperature T2: Pipe temperature of indoor heat exchanger T3: Pipe temperature of outdoor heat exchanger T4: Outdoor ambient temperature 9.2 Display function 9.2.1 Icon explanation on indoor display board. ① ② ③ ④... -
Page 24: Fan-Only Mode
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. -
Page 25: Cooling Mode
9.5 Cooling Mode 9.5.1 The operation frequency of compressor after starting submits to following rule. -0.5 -1.0 When the machine is running and ΔT(=room temp. – setting temp.) changes, the frequency of compressor will rise or descend a grade (7 minutes after starting). After start, if ΔT stays in a zone for 3 minutes, the frequency will change as follow: Zone A : Current frequency rise a grade till the maximum grade. -
Page 26: Drying Mode
2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature. 9.5.5 Turbo function(press the “TURBO” button on remote controller) 1) Elevate current frequency to a higher grade. 2) Indoor fan turns to turbo speed. - Page 27 ℃ setting fan speed low fan breeze super breeze fan stop 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.
- Page 28 Zone H: Compressor stops after running with F1 for 60 minutes or when ΔTh＞6℃. 9.7.4 Outdoor unit current control in heating mode. comp. pause I3HEAT freq. descends if curr. rises; I2HEAT freq. remains if curr. descends I1HEAT running normally Remark: I1HEAT I2 HEAT I3 HEAT...
- Page 29 If any one of following items is satisfied, defrosting will finish and the machine will turn to normal heating mode. a) T3 rises to be higher than 12℃. b) T3 rises to be higher than 8℃ and remains for 80 seconds. c) The machine has run for 10 minutes in defrosting.
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Page 30: Auto Mode Function
9.8 Auto mode function 9.8.1 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 ΔT(ΔT =T1-Ts). ΔT=T1-Ts Running mode Cooling ΔT＞1℃... -
Page 31: Timer Function
℃ ℃ high high Outdoor fan action in heating mode Outdoor fan action in cooling & drying mode (including heating in auto mode). (including cooling in auto & forced mode). 9.11.2 Outdoor fan action in cooling & drying mode(including cooling in auto & forced mode). Please refer to the pic. -
Page 32: Ionizer/Plasma Dust Collector Function(Optional)
9.15 Plasma dust collector function(optional) The indoor unit is equipped with Plasma, which is controlled by the TURBO button on the remote controller when the unit is turned on. Press the TURBO button at least 2 second to activate the function. Press it again (at least 2 second) to stop the function. -
Page 33: Troubleshooting
10. Troubleshooting Safety Because of there are capacitors in PCB and relative circuit in outdoor unit, even shut down the power supply, electricity power still are kept in capacitors, do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Bulb (25-40W) -
Page 34: Indoor Unit Error Display
10.1 Indoor Unit Error Display AUTO Failure phenomenon TIM Lamp RUN Lamp Lamp Lamp EEPROM ○ ○ ○ ○ parameter error Indoor and Outdoor ☆ ☆ ☆ ☆ communication error Zero-crossing ☆ ☆ ○ ○ examination error Indoor fan speed out ☆... -
Page 35: Diagnosis And Solution
10.2 Diagnosis and Solution 10.2.1 EEPROM parameter error diagnosis and solution Circuit or software error on indoor PCB Replace indoor PCB 102.2 Indoor / outdoor units communication protection error diagnosis and solution Disconnect the power supply, after 1 minute, connect the power supply , turn on the unit with remote controller Does the unit work normally? Check the wiring between... - Page 36 10.2.4 Indoor fan speed out of control diagnosis and solution Is the indoor fan motor Repair the connector and connector and connection reconnect good? Is voltage being applied to the fan motor right? Indoor PCB is defective. Replace the indoor PCB. Replace the indoor fan motor 10.2.5 Open or short circuit of outdoor temperature sensor or outdoor EEPROM parameter error diagnosis...
- Page 37 10.2.8 Over voltage or too low voltage protection diagnosis and solution. Be sure the power supply is Is the power supply good? normal when using the units Replace the outdoor e-box. 10.2.9 Temperature protection of compressor top diagnosis and solution. Is the connection Does compressor Reconnect and retest.
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Page 38: Key Parts Checking
10.3 Key parts checking. 10.3.1. Compressor checking (Model: DA108X1C-20FZ3). Measure the resistance value of each winding by using the multi-meter. Position Resistance Value Blue - Red 0.71Ω Blue - Black (20℃) Red - Blue 10.3.2 Step Motor (Model: MP2835). Measure the resistance value of each winding by using the multi-meter. Position Resistance Value... - Page 39 10.3.3 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 (KΩ)