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Klimaire KMIR MKMIR218-H221 Troubleshooting Manual
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Klimaire KMIR MKMIR218-H221 Troubleshooting Manual

Multi outdoor units
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KMIR
CONDENSING UNITS
Model Numbers:
MKMIR218-H221, KMIR327-H217,
KMIR436-H217, KMIR545-H219
Table of Contents
1.
Trouble Shooting
WARNING
Installation MUST conform with local building codes or, in the absence of local
codes, with the National Electrical Code NFPA70/ANSI C1-1993 or current edition
and Canadian Electrical Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service
technician familiar with safety procedures and equipped with the proper tools and
test instruments
Installation or repairs made by unqualified persons can result in hazards to you
and others.
Failure to carefully read and follow all instructions in this manual can result in
equipment malfunction, property damage, personal injury and/or death.
Multi outdoor units
troubleshooting
Multi zone

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Summary of Contents for Klimaire KMIR MKMIR218-H221

  • Page 1 Multi outdoor units Multi zone troubleshooting KMIR CONDENSING UNITS Model Numbers: MKMIR218-H221, KMIR327-H217, KMIR436-H217, KMIR545-H219 Table of Contents Trouble Shooting WARNING  Installation MUST conform with local building codes or, in the absence of local codes, with the National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1.

  • Page 2: Troubleshooting

    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!) Bulb (25-40W)

  • Page 3: Indoor Unit Error Display

    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 ★ Open or short circuit of T1 temperature sensor ★...

  • Page 4: Outdoor Unit Display

     ★ ★ 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 5 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 6 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 The frequency after the frequency limit...
  • Page 7 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 F indoor unit evaporator outlet temp.(T...
  • Page 8 8.3.3 Outdoor unit error display Display LED STATUS Error Error (CTBU) (Oasis) 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 ——...

  • Page 9: Diagnosis And Solution

    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 10 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. Supposed causes ● Wiring mistake ● Indoor or outdoor PCB faulty Trouble shooting:...
  • Page 11 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 12 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 13 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 14 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 15 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 ● Wiring mistake ●...
  • Page 16 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 17 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 18 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 conditions chip is abnormal, the display LED will show “P6” and AC will turn off. Supposed causes ●...
  • Page 19 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 Connect it tightly,...
  • Page 20 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 21 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. Supposed causes ● Wiring mistake ● Over load protector faulty ● System block ● Outdoor PCB faulty Temperature protection of compressor top Whether compressor...
  • Page 22 Water-level alarm malfunction (For cassette/A5 duct) 8.4.1.10 diagnosis and solution Malfunction decision If the sampling voltage is not 5V, the LED will display the conditions failure. Supposed causes ● Wiring mistake ● Water-level switch faulty ● Water pump faulty ● Indoor PCB faulty Power off, then restart the unit 3 minutes Power off, then restart the unit 3 minutes later.
  • Page 23 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. 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.

  • Page 24: Outdoor Unit Trouble Shooting

    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 Power off, then restart the...
  • Page 25 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 26 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 27 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 28 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 29 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. Supposed causes ● Wiring mistake ● PCB faulty Trouble shooting: Communication malfunction between IPM board and outdoor main board Is there at least one LED in...
  • Page 30 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 31 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 32 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 ● PCB faulty Trouble shooting: Voltage protection Check the voltage of...
  • Page 33 IPM (for dual/tri- zone) IPM (for qua- zone) P-N (for dual/tri-zone)
  • Page 34 P-N (for qua-zone)
  • Page 35 bridge rectifier (for dual/tri-zone) bridge rectifier (for qua-zone)
  • Page 36 Remark: Measure the DC voltage between + and - port. The normal value should be 190V~250V.
  • Page 37 8.4.2.6 E6 (PFC module protection) error diagnosis and solution. (For C3OE-36HFN1-M and C5OE-48HFN1-M Error Code Malfunction decision When the voltage signal that PFC sends to main control board conditions is abnormal, the display LED will show “E6” and AC will turn off.
  • Page 38 Inductance Two ports of the inductance...
  • Page 40 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 41 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 43 8.4.2.8 P0 (Temperature protection of compressor top) error diagnosis and solution. Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions ● Wiring mistake Supposed causes ● Over load protector faulty ● System block ●...
  • Page 45 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. Supposed causes ● Wiring mistake ● Over load protector faulty ● System block ●...
  • Page 46 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 Whether the high...
  • Page 48 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. Supposed causes ● Wiring mistake ● Over load protector faulty ● System block ●...
  • Page 49 Low pressure protection Low pressure protection Whether the wiring Whether the wiring between the low pressure between the low pressure Connect it well protector and main control protector and main control Connect it well board is connected well or board is connected well or correctly correctly Whether the low...
  • Page 51 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. Supposed causes ● Wiring mistake ● Over load protector faulty ●...

  • Page 53: Error Code

    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 conditions than 115℃ for 10 seconds, the compressor will stop restart till T5 is less than 90℃. Supposed causes ●...
  • Page 54 8.4.2.13 P5 (High temperature protection of condenser) error diagnosis and solution. Error Code Malfunction decision When outdoor pipe temperature is more than 65° C, the unit will stop, and unit runs again when outdoor pipe temperature is less conditions than 52° C Supposed causes ●...
  • Page 55 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 conditions chip is abnormal, the display LED will show “P6” and AC will turn off. Supposed causes ●...
  • Page 56 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 Connect it tightly,...
  • Page 57 8.4. 2.15 The cooling operation or heating operation does not operate. Supposed causes ● 4-way valve faulty 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 58: Trouble Criterion Of Main Parts

    8.5 Trouble Criterion Of Main Parts. Spec. Indoor unit Model 9k Oasis 12k Oasis 18k Oasis 24k Oasis Indoor fan motor WZDK20-38G WZDK20-38G WZDK58-38G WZDK60-38G Model KDIR09-H2 KDIR12-H2 KDIR18-H2 KDIR24-H2 Indoor fan motor WZDK55-38GS-W WZDK55-38GS-W WZDK90-38GS-W WZDK90-38GS-W Model KTIR09-H2 KTIR12-H2 KTIR18-H2 Indoor fan motor WZDK46-38G...
  • Page 59 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...

This manual is also suitable for:

Kmir kmir327-h217Kmir kmir436-h217Kmir kmir545-h219