Multi outdoor units Multi - Zone SERVICE MANUAL heat pump units Model Numbers: KMIR218-H221 / KMIR327-H217 / KMIR436-H217 / KMIR545-H219 Table of Contents Indoor Unit Combination Suggested Indoor Unit Model Numbers Dimension Of Outdoor Unit Refrigerant Cycle Diagram Installation Details...
Page 2
https://appliancetechmanuals.com CONTENTS Indoor Unit Combination ............................4 Suggested Indoor Unit Model Numbers ........................5 Dimension Of Outdoor Unit............................6 Refrigerant Cycle Diagram ............................7 Installation Details ..............................9 5.1 Wrench torque sheet for installation ......................... 9 5.2 Connecting the cables ............................9 5.3 Pipe length and the elevation ..........................
https://appliancetechmanuals.com 3. Refrigerant Cycle Diagram 4.1 Refrigeration circuit drawing of inverter 1 drives 2 type INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A CHECK VALVE EXV B CAPILIARY B LIQUID VALVE B Condenser temp. sensor CAPILIARY TUBE HEAT HEAT EXCHANGE T4 Ambient T1 Room...
Page 7
https://appliancetechmanuals.com 4.3 Refrigeration circuit drawing of inverter 1 drives 4 type INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B LIQUID VALVE B CHECK VALVE EXV C CAPILIARY C LIQUID VALVE C Condenser temp. sensor EXV D CAPILIARY D CAPILIARY TUBE LIQUID VALVE D HEAT...
https://appliancetechmanuals.com Additional refrigerant charge 4. Installation Details 1 drive 2 1 drive 3 1 drive 4 1 drive 5 5.1 Wrench torque sheet for installation Chargeless pipe 22.5 37.5 length (m) (49.2ft) (73.8ft) (98.4ft) (123ft) Additiona 15 x 15 x 15 x 15 x Outside diameter...
Page 9
https://appliancetechmanuals.com will create an acid that will damage the motor achieved, close the low pressure gauge windings and components. handle off and shut the vacuum pump off. Therefore, the indoor units and the pipes between Recheck the reading after 10 minutes, the indoor and outdoor units must be leak tested and vacuum may change slightly, this is normal.
https://appliancetechmanuals.com 7). Mount the valve stems nuts and the service the system close the low pressure valve on the port cap. gauge manifold set and record the operating Be sure to use a torque wrench to tighten the pressure. The system is now charged and the service port cap to a torque 18N·m (13.27 ft·lbs).
https://appliancetechmanuals.com manifold set to start charging the unit with liquid running the compressor in a vacuum could refrigerant, keep track of the refrigerant being damage the motor windings. Note that units with added to the system (do not overcharge the extended lines and additional refrigerant charge system).
https://appliancetechmanuals.com 5.7 Evacuation after servicing the outdoor 2). Purge the air from the charge hose Open the valve at the bottom of the cylinder and press unit refrigeration circuit the check valve on the charge set to purge the air (be careful of the liquid refrigerant).
https://appliancetechmanuals.com 6.3 Main Protection 6.3.1 Three Minutes Delay at restart for compressor. ---- 1min delay for the 1 time start-up and 3 minutes delay for others. 6.3.2 Temperature protection of compressor discharge. When the compressor discharge temperature is getting higher, the running frequency will be limited as below rules: ----If 221 ºF(105 ºC)≦T5<230 ºF (110ºC), keep the current frequency.
Page 14
https://appliancetechmanuals.com Note: if the low voltage protection occurs and not ºF resumes within 3min, it will keep the protection always after restart the machine. HeatT4Zone4I 6.3.6 Compressor current limit protection HeatT4Zone3I Temperature interval.of current limit is same as range of T4 limited frequency. HeatT4Zone2I Cooling mode: HeatT4Zone1I...
https://appliancetechmanuals.com 6.3.10 Oil return According to the final capacity request to confirm the operating frequency, as following Running rules: table. 1. If the compressor frequency keeps lower than … COOL setting frequency for setting time, the AC will rise Frequency (Hz) L_F2 …...
Page 16
https://appliancetechmanuals.com 3)If the compressor cumulate running time is up to Then modify it according to T2 average 40 minutes and T3< -11ºF (-24C) for 3 minutes. (correction): 4)If the compressor cumulate running time is up to Note:Average value of T2:Sum T2 value of all 120 minutes and T3<-5ºF (-15ºC).
Page 17
https://appliancetechmanuals.com Outdoor temperature ºF Increase fan speed increase Supper high fan speed LowCoolT3_ON High fan speed Keep current fan speed LowCoolT3_Down Middle fan speed Decrease fan speed Low fan speed LowCoolT3_OFF Supper low fan speed Fan stop Breeze fan speed F fan speed G fan speed H fan speed...
Page 18
https://appliancetechmanuals.com starts. 3. The action priority of the EXVs is A-B-C-D-E. 4. Compressor and outdoor fan start operation only after EXV is initialized. 6.4.4.1 Cooling mode The initial open angle of EXV is depend on indoor model size, adjustment range is 100-400p. When the unit start to work for 3 minutes, the outdoor will receive indoor units( of capacity demand) T2B information and calculate the average of them.
https://appliancetechmanuals.com 8. Troubleshooting 8.1Safety 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. The value of resistance is about 1500 ohm to 2000 ohm Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!)
https://appliancetechmanuals.com The voltage in P3 and P4 in outdoor PCB is high voltage about 310V The voltage in P5 and P6 in outdoor PCB is high voltage about 310V 8.2 Indoor Unit Error Display Console series Operation Timer De-frost Failure ★...
https://appliancetechmanuals.com ★ ★ Outdoor fan has been out of control —— ★ Indoor fan speed has been out of control ★ Voltage protection ★ Temperature protection of compressor top. ★ ★ ★ Outdoor unit over-current protection ——...
Page 25
https://appliancetechmanuals.com Push the switch SW1 to check the states of unit when the unit is running. The digital display tube will display the follow procedure when push SW1 each time. Display Remark Normal display Display running frequency, running state or malfunction code Quantity of indoor units in good connection Actual data Display...
Page 26
https://appliancetechmanuals.com A Indoor unit capacity demand code B Indoor unit capacity demand code Norm code*HP C Indoor unit capacity demand code (9K:1HP,12K:1.2HP,18K:1.5HP) D Indoor unit capacity demand code E Indoor unit capacity demand code Outdoor unit amendatory capacity demand code Forced cooling:7 The frequency corresponding to the total indoor units amendatory capacity demand...
Page 27
https://appliancetechmanuals.com Average value of T2 (Sum T2 value of all indoor units)/( number of indoor units in good connection) Outdoor unit fan motor state Off:0, High speed:1, Med speed:2, Low speed:3 Breeze:4, Super breeze:5 The last error or protection code 00 means no malfunction and protection F indoor unit capacity F Indoor unit capacity demand code...
Page 28
https://appliancetechmanuals.com 8.3.3 Outdoor unit error display Display LED STATUS Error Error (KDIR) (KSIE) Outdoor EEPROM malfunction Communication malfunction between indoor and outdoor units Communication malfunction between IPM board and outdoor main —— —— board Open or short circuit of outdoor temperature sensor (T3、T4、T5、 T2B) Voltage protection ——...
https://appliancetechmanuals.com 8.4 Diagnosis and Solution 8.4.1 Indoor unit trouble shooting 8.4.1.1 Indoor EEPROM malfunction diagnosis and solution. Malfunction decision PCB main chip does not receive feedback from EEPROM chip conditions ● Installation mistake ● PCB faulty Trouble shooting: Shut off the power supply and turn it on 1 minute later.
Page 30
https://appliancetechmanuals.com 8.4.1.2 Communication malfunction between indoor and outdoor units diagnosis and solution. Malfunction decision Indoor unit does not receive the feedback from outdoor unit conditions during 120 seconds. ● Wiring mistake Supposed causes ● Indoor or outdoor PCB faulty Trouble shooting:...
Page 31
https://appliancetechmanuals.com Indoor / outdoor units communication error Start: Power off , then Power on the A/C by the Breaker. (reconnect the power wire). Is it still displaying the error code? Check wiring on the outdoor and indoor terminal follow the wiring diagram. Is all Reconnect the wiring connecting correctly? Reconnect the wiring...
Page 32
https://appliancetechmanuals.com Pic 1: Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit. The red pin of multimeter connects with L2 port while the black pin is for S port. When AC is normal running, the voltage will move alternately between positive value and negative value.
Page 33
https://appliancetechmanuals.com PIC3: Main board LED when power on and unit standby. PIC 4: Check point button, press 1 time for check how many indoor units are connected.
Page 34
https://appliancetechmanuals.com 8.4.1.3 zero-crossing signal error diagnosis and solution. Malfunction decision When PCB does not receive zero crossing signal feedback for conditions 4 minutes or the zero crossing signal time interval is abnormal. Supposed causes ● Connection mistake ● PCB faulty Trouble shooting: Check if the connections and Correct the connections.
Page 35
https://appliancetechmanuals.com 8.4.1.4 Indoor fan speed has been out of control diagnosis and solution. Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, the unit conditions will stop and the LED will display the failure. Supposed causes ●...
Page 36
https://appliancetechmanuals.com Index 1: 1: Indoor AC fan motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V (208~240V power supply)or 50V(115V power supply), the PCB must have problems and need to be replaced.
Page 37
https://appliancetechmanuals.com 8.4.1.5 Open or short circuit of temperature sensor diagnosis and solution. Malfunction decision If the sampling voltage is lower than 0.06V or higher than conditions 4.94V, the LED will display the failure. Supposed causes ● Wiring mistake ● Sensor faulty ●...
Page 38
https://appliancetechmanuals.com 8.4.1.6 IPM module or IGBT over-strong current protection diagnosis and solution. Malfunction decision When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P6” and AC will conditions turn off. ● Wiring mistake Supposed causes ●...
Page 39
https://appliancetechmanuals.com IPM module protection Check whether the voltage range Check whether the input Regulate it to correct, then of P-N on IPM module is normal? power supply is correct? check whether the system DC277-356V for 18-27KBtu/h; 208-230V, 1N, 60Hz can work normally? DC277-410V for 36KBtu/h Check whether the connecting line between main board and...
Page 40
https://appliancetechmanuals.com 8.4.1.7 Over voltage or too low voltage protection diagnosis and solution. Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(L1) and N (L2) is about 187~253VAC Check whether the voltage of IPM board P and N is normal? DC277-356V for 18-27KBtu/h;...
Page 41
https://appliancetechmanuals.com 8.4.1.8 Temperature protection of compressor top diagnosis and solution. Malfunction decision If the sampling voltage is not 5V, the LED will display the conditions failure. ● Wiring mistake Supposed causes ● Over load protector faulty ● System block ● Outdoor PCB faulty Temperature protection of compressor top Whether compressor...
Page 42
https://appliancetechmanuals.com Water-level alarm malfunction (For cassette / ducted) 8.4.1.10 diagnosis and solution Malfunction decision If the sampling voltage is not 5V, the LED will display the conditions failure. ● Wiring mistake Supposed causes ● Water-level switch faulty ● Water pump faulty ●...
Page 43
https://appliancetechmanuals.com 8.4.1.11 Mode conflict. Error Code Malfunction decision The indoor units cannot work cooling mode and heating at same time. conditions Heating mode has a priority. ● Suppose Indoor unit A working in cooling mode or fan mode, and Unit action indoor unit B is set to heating mode, then A will change to off and B will work in heating mode.
Page 44
https://appliancetechmanuals.com 8.4.2 Outdoor unit trouble shooting 8.4.2.1 E0 (Outdoor EEPROM malfunction) error diagnosis and solution Error Code Malfunction decision PCB main chip does not receive feedback from EEPROM chip conditions Supposed causes ● Installation mistake ● PCB faulty Trouble shooting: Outdoor EEPROM malfunction Outdoor EEPROM malfunction Power off, then restart the...
Page 45
https://appliancetechmanuals.com 8.4.2.2 E2(Communication malfunction between indoor and outdoor units) error diagnosis and solution. Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit conditions during 120 seconds or outdoor unit does not receive the feedback from any one indoor unit during 180 seconds. Supposed causes ●...
Page 46
https://appliancetechmanuals.com Communication malfunction between indoor and outdoor units Start: Power off , then Power on the A/C by the Breaker. (reconnect the power wire). Is it still displaying the error code? Check wiring on the outdoor and indoor terminal follow the wiring diagram. Is all Reconnect the wiring connecting correctly? Reconnect the wiring...
Page 47
https://appliancetechmanuals.com Pic 1: Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit. The red pin of multimeter connects with L2 port while the black pin is for S port. When AC is normal running, the voltage will move alternately between positive value and negative value.
Page 48
https://appliancetechmanuals.com Pic 2: IPM (For qua-zone) Power, Self-Check Operating PIC3: Main board LED when power on and unit standby. PIC 4: Check point button, press 1 time for check how many indoor units are connected.
Page 49
https://appliancetechmanuals.com 8.4.2.3 E3 (Communication malfunction between IPM board and outdoor main board) error diagnosis Error Code Malfunction decision PCB main chip does not receive feedback from IPM module conditions during 60 seconds. ● Wiring mistake Supposed causes ● PCB faulty Trouble shooting: Communication malfunction between IPM board and outdoor main board...
Page 50
https://appliancetechmanuals.com Remark: Use a multimeter to test the DC voltage between black pin and white pin of signal wire The normal value should be around 5V. Use a multimeter to test the DC voltage between black pin and red pin of signal wire. The normal value should be around 12V.
Page 51
https://appliancetechmanuals.com 8.4.2.4E4(open or short circuit of outdoor temperature sensor) diagnosis and solution F1/F2/F3/F4/F5 (open or short circuit of indoor coil temperature sensor) diagnosis and solution. Error Code E4/F1/F2/F3/F4/F5 Malfunction decision If the sampling voltage is lower than 0.06V or higher than conditions 4.94V, the LED will display the failure.
Page 52
https://appliancetechmanuals.com 8.4.2.5 E5 (Voltage protection) error diagnosis and solution. Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes ● Power supply problems. ● System leakage or block ●...
Page 56
https://appliancetechmanuals.com Remark: Measure the DC voltage between + and - port. The normal value should be 190V~250V.
Page 57
https://appliancetechmanuals.com 8.4.2.7 E8 (Outdoor fan speed has been out of control) diagnosis and solution Error Code Malfunction decision When outdoor fan speed keeps too low (300RPM) or too high(2400RPM) conditions for certain time, the unit will stop and the LED will display the failure. Supposed causes ●...
Page 58
https://appliancetechmanuals.com 1. DC fan motor(control chip is inside fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must have problems and need to be replaced.
Page 60
https://appliancetechmanuals.com 8.4.2.8 P0 (Temperature protection of compressor top) error diagnosis and solution. Error Code If the sampling voltage is not 5V, the LED will display the failure. Malfunction decision conditions ● Wiring mistake Supposed causes ● Over load protector faulty ●...
Page 62
https://appliancetechmanuals.com 8.4.2.9 P1 (High pressure protection) error diagnosis and solution. Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the conditions failure. ● Wiring mistake Supposed causes ● Over load protector faulty ● System block ●...
Page 63
https://appliancetechmanuals.com High pressure protection High pressure protection Whether the wiring Whether the wiring between the high pressure between the high pressure switch and main control switch and main control Connect it well Connect it well board is connected well or board is connected well or correctly correctly...
Page 65
https://appliancetechmanuals.com 8.4.2.10 P2 (Low pressure protection) error diagnosis and solution. Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the conditions failure. ● Wiring mistake Supposed causes ● Over load protector faulty ● System block ●...
Page 66
https://appliancetechmanuals.com Low pressure protection Low pressure protection Whether the wiring Whether the wiring between the low pressure between the low pressure protector and main control protector and main control Connect it well Connect it well board is connected well or board is connected well or correctly correctly...
Page 68
https://appliancetechmanuals.com 8.4.2.11 P3 (Current protection of compressor) error diagnosis and solution. Error Code Malfunction decision If the outdoor current exceeds the current limit value, the LED conditions will display the failure. ● Wiring mistake Supposed causes ● Over load protector faulty ●...
Page 70
https://appliancetechmanuals.com 8.4.2.12 P4 (Temperature protection of compressor discharge) error diagnosis and solution. Error Code Malfunction decision When the compressor discharge temperature(T5) is more than 239ºF (115ºC) for 10 seconds, the compressor will conditions stop andrestart till T5 is less than 194ºF (90ºC). ●...
Page 71
https://appliancetechmanuals.com 8.4.2.13 P5 (High temperature protection of condenser) error diagnosis and solution. Error Code When outdoor pipe temperature is more than 149ºF (65°C), the Malfunction decision unit will stop, and unit runs again when outdoor pipe temperature conditions is less than 126ºF (52°C). Supposed causes ●...
Page 72
https://appliancetechmanuals.com 8.4.2.14 P6 (IPM module protection) error diagnosis and solution. Error Code Malfunction decision When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P6” and AC will conditions turn off. ● Wiring mistake Supposed causes ●...
Page 73
https://appliancetechmanuals.com IPM module protection Check whether the voltage range Check whether the input Regulate it to correct, then of P-N on IPM module is normal? power supply is correct? check whether the system DC277-356V for 18-27KBtu/h; 208-230V, 1N, 60Hz can work normally? DC277-410V for 36KBtu/h Check whether the connecting line between main board and...
Page 74
https://appliancetechmanuals.com 8.4. 2.15 The cooling operation or heating operation does not operate. ● 4-way valve faulty Supposed causes Check of 4-way, please refer to part 5 in 9.5 Trouble Criterion Of Main Parts. 8.4.2.16 When cooling, heat exchanger of non-operating indoor unit frosts. When heating, non-operating indoor unit get warm.
Page 75
https://appliancetechmanuals.com 8.5 Trouble Criterion Of Main Parts. Spec. Indoor unit KSIE009-H221-I KSIE012-H220-I KSIE018-H220-I KSIE024-H220-I Model Indoor fan motor WZDK20-38G WZDK20-38G WZDK58-38G WZDK60-38G KDIR09-H2 KDIR12-H2 KDIR18-H2 KDIR24-H2 Model Indoor fan motor WZDK55-38GS-W WZDK55-38GS-W WZDK90-38GS-W WZDK90-38GS-W KDIR09-H2 KDIR12-H2 KDIR18-H2 Model Indoor fan motor WZDK46-38G WZDK46-38G WZDK46-38G...
Page 76
https://appliancetechmanuals.com 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. Measure the resistance value of each winding by using the multi-meter.
Page 77
https://appliancetechmanuals.com Appendix 1 Temperature Sensor Resistance Value Table (ºC-K) ºF ºF ºF ºF K Ohm K Ohm K Ohm K Ohm 12.6431 2.35774 0.62973 115.266 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190 10.000...
Page 80
https://appliancetechmanuals.com 3. IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Normal Normal resistance Digital tester Digital tester resistance value...
Page 82
https://appliancetechmanuals.com 6.EXV check Disconnect the connectors.
Page 83
https://appliancetechmanuals.com Resistance to EXV coil Color of lead wire Normal Value Red- Blue Red - Yellow About 50Ω Brown-Orange Brown-White...
Page 84
https://appliancetechmanuals.com Red- Blue Red - Yellow...
Page 86
The Klimaire logo is a registered Trademark of Klimaire Products inc. Copyright 2016 Klimaire Products Inc. 2190 NW 89 Place, Doral, FL 33172 - USA Tel: (305)593-8358 Fax (305) 675-2212 www.klimaire.com sales@klimaire.com The design and specifications are subject to change without prior notice for product...
Need help?
Do you have a question about the KMIR218-H221 and is the answer not in the manual?
Questions and answers