RMI-1103-A SERVICE MANUAL MIDEA AIRCONDITIONER EUROPE MARKET DC INVERTER MULTI TYPE R DC INVERTER MULTI SERIES 2. Function 2.1 Model Names of Indoor units Capacity DC Indoor units 7k MDSRI-07HRDN1 Inverter Multi 9k MDSRI-09HRDN1 12k MDSRI-12HRDN1 18k MDSRI-18HRDN1 Series 6 2.2 Product features Indoor unit Operation by remote controller Sensing by temperature sensor Room temperature control Maintain the room temperature in accordance with the setting temperature. Ionizer(optional) Anti-freezing control in cooling Time Delay Safety control Golden fin(optional) Indoor fan speed control high, med, low, breeze,auto Tele Remote control (Optional) Two-direction air vane The unit will decide the louver direction according to operation mode. Sleep mode auto control Self-diag. function Anti-cold function Independent dehumidification Prevent the cold wind at the beginning of unit start. The function is usually used in rainy days in springtime or damp areas. Auto defrost Air flow Direction The louver can be set at the desired position or swing up and down automatically Auto-restart function Auto mode Flexible wiring connection Temp. Compensation 7 3. Dimension Model W H D 710 250 189 MDSRI-12HRDN1 790 275 196 MDSRI-18HRDN1 930 275 198 MDSRI-07HRDN1 MDSRI-09HRDN1 Position of installation board Model R(mm) L(mm) H(mm) Dimension of installation hole(mm) MDSRI-07HRDN1 111.5 100 45 φ65 MDSRI-09HRDN1 111.5 100 45 φ65 MDSRI-12HRDN1 83.5 100 45 φ65 MDSRI-18HRDN1 207 150 45 φ65 4. Wiring Diagram MDSRI-07HRDN1 MSRI-12HRDN1 MDSRI-09HRDN1 MSRI-18HRDN1 5. Operation characteristics Temperature Mode Room temperature Outdoor temperature Cooling operation Heating operation Drying operation ≥17℃ ≤30℃ ≥17℃ 0℃～50℃ -15℃～24℃ 0℃～50℃ CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally. 2. The room relative humidity should be less than 80%. If the air conditioner operates beyond this figure, the surface of the air conditioner may attract condensation. Please set the vertical air flow louver to its maximum angle (vertically to the floor), and set HIGH fan mode. 3. The optimum performance will be achieved during this operating temperature zone. 6. Electronic function 6.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature Ts：Setting temp. 6.3 Main Protection 6.3.1 Three minutes delay at restart for compressor. 6.3.2 Indoor fan delayed open function ----When system starts up, the louver will be active immediately and the indoor fan will open after 10s. ----If the system runs at heating mode, the indoor fan will be also controlled by anti-cold wind function. 6.3.3 Sensor protection at open circuit and breaking disconnection. 6.3.4 Fan speed is out of control. When Indoor fan speed is too low (lower than 300RPM) lasting 50 seconds, the unit stops and LED displays failure information and can’t returns to normal operation automatically. 6.3.5 Zero crossing detection error protection If AC can not detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and the LED will display the failure. The correct zero crossing signal time interval should be between 6-13ms. 6.4 Operation Modes and Functions 6.4.1 Fan mode (1) The outdoor fan and compressor stop. (2)Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates the same as in cooling mode. (5) Auto fan: The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24℃ setting temperature. 27.5 High 27 25.5 Medium 25 Low 6.4.2 Cooling Mode 126.96.36.199 Compressor running rules: The compressor will run at corresponding frequency according to the gross amendatory capacity demand. Frequency(Hz) 0 COOL_F1 COOL_F2 …… COOL_F11 COOL_F12 Amendatory capacity demand. 0 1 2 …… 11 ≧12 Meanwhile the maximum running frequency will be adjusted according to the outdoor ambient temp. 43 COOL_F4 42 41 COOL_F5 39 38 COOL_F6 37 No limit 188.8.131.52 Indoor fan running rules In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto. Auto fan in cooling mode acts as follow: 3.5 High 3 Medium 1.5 1 Low 184.108.40.206 Evaporator low temperature T2 protection. When T2<4℃, the indoor has no capacity demand and resume till T2>8℃. 220.127.116.11 Outdoor fan running rules: H igh 22 20 Low 6.4.3 Heating Mode 18.104.22.168 Compressor running rules: The compressor will run at corresponding frequency according to the gross amendatory capacity demand. Frequency(Hz) 0 HEAT_F1 HEAT _F2 …… HEAT _F11 HEAT _F12 Amendatory capacity demand. 0 1 2 …… 11 ≧12 22.214.171.124 Indoor fan running rules: Indoor fan speed can be set as high, medium, low or auto fan and the anti-cold-wind function is preferential. T2 44℃ 38℃ ℃ Setting 37℃ Low 34℃ 33℃ Breeze 24℃ 17℃ Super Breeze Off Auto fan action in heating mode. Low 2.5 2 Medium 1.5 1 High 126.96.36.199 Outdoor fan running rules: 14 Low 12 High 188.8.131.52 High evaporator coil temp.T2 protection: If T2>63℃, the indoor unit has no capacity demand and resume till 48℃. 184.108.40.206 Defrosting mode： Condition of defrosting: T3≦TCDIN and lasts for 40 minutes. TCDIN=－2℃. Defrosting action： HEAT_F2 COOL_F9 Compressor 10S 30S 30S 10S 4-Way valve Outdoor fan Indoor fan 10S Condition of ending defrosting: If any one of following items is satisfied, defrosting will stop and the machine will turn to normal heating mode. ① T3 >TCDE; TCDE=15℃. ② The defrosting time achieves 10min. 6.4.4 Auto-mode 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 Running mode ∆T＞1℃ Cooling -1≤∆T≤1℃ Fan-only ∆T<-1℃ Heating Indoor fan will run at auto fan of the relevant mode. The louver operate same as in relevant mode. If the machine switches mode between heating and cooling, the compressor will keep stopping for 15 minutes and then rechoose mode according to T1-Ts. If the setting temperature is modified, the machine will rechoose running function. 6.4.5 Drying mode 220.127.116.11 Indoor fan speed is fixed at breeze and can’t be changed. The louver angle is the same as in cooling mode. 18.104.22.168 Overlow room temperature protection In drying mode, if room temperature is lower than 10℃, the indoor fan will stop and not resume until room temperature exceeds 12℃. 22.214.171.124 Evaporator anti-freezing protection are active 6.4.6 Forced operation function 126.96.36.199 Enter forced operation function: Press the touch button continually, the AC will run as below sequence: Forced auto→Forced cooling→Off 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, the machine will turn into forced cooling mode. In forced cooling mode, pressing touch button will turn off the machine. 188.8.131.52 In forced operation mode, all general protections and remote control are available. 184.108.40.206 Operation rules: Forced cooling mode: The indoor fan runs as breeze. After running for 30 minutes, AC will turn to auto mode with 24℃ setting temperature. Forced auto mode: The action of forced auto mode is the same as normal auto mode with 24℃ setting temperature. 220.127.116.11 When there’s indoor unit running in forced cooling, it is the master forced cooling unit. Other indoor units will run at forced cooling mode too and they will be the slave forced cooling units. The slave forced cooling units can not quit forced cooling mode until the master forced cooling unit quit, and turn to cooling mode at low speed with 24℃ setting temperature. 18.104.22.168 The slave forced cooling units will not be controlled by other signals except timer off signal. For model MSR1I-07HRDN1-Q& MSR1I-09HRDN1-Q, the slave forced cooling units will not be controlled by other signals. 22.214.171.124 If AC is running in sleep mode and receives forced operation signal, it will quit the sleep mode. 6.4.7 Timer function 126.96.36.199 Timing range is 24 hours. 188.8.131.52 Timer on. The machine will turn on automatically when reaching the setting time. 184.108.40.206 Timer off. The machine will turn off automatically when reaching the setting time. 220.127.116.11 Timer on/off. The machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time. 18.104.22.168 Timer off/on. The machine will turn off automatically when reaching the setting “off” time, and then turn on automatically when reaching the setting “on” time. 22.214.171.124 The timer function will not change the AC current operation mode. Suppose AC is off now, it will not start up firstly after setting the “timer off” function. And when reaching the setting time, the timer LED will be off and the AC running mode has not been changed. 126.96.36.199 The setting time is relative time. 6.4.8 Sleep function mode 188.8.131.52 Operation time in sleep mode is 7 hours. After 7 hours the AC quits this mode and turns off. 184.108.40.206. Operation process in sleep mode is as follow: 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 stops rising and indoor fan is fixed as low speed.(Anti-cold wind function has the priority) 220.127.116.11 Timer off and remote controller off signals have the priority compared with sleep function. 18.104.22.168 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 mode. 6.4.9 Auto-Restart function The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In case of a sudden power failure, the module memorizes the setting conditions before the power failure. The unit will resume the previous operation setting (not including Swing function) automatically after 3 minutes when power returns. If the memorization condition is forced cooling mode, the unit will run in cooling mode for 30 minutes and turn to auto mode as 24℃ setting temp. 6.4.11 Mode conflict The indoor units can not work cooling mode and heating at same time. Heating mode has a priority. 22.214.171.124 Definition: Cooling mode Heating Mode Fan Off Cooling mode No Yes No No Heating Mode Yes No Yes No Fan No Yes No No Off No No No No No: No mode conflict; Yes: Mode conflict 126.96.36.199 Unit action Suppose Indoor unit A working in cooling mode or fan mode, and indoor unit B is set to heating mode, then A will change to off and B will work in heating mode. Suppose Indoor unit A working in heating mode, and indoor unit B is set to cooling mode or fan mode, then B will change to stand by and A will be no change.
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