Hybrid Flex Inverter System 2 .
. TROUBLESHOOTING 2-1 Service maintenance for Hybrid Flex Inverter System 2-1-1 Features Enhanced installability and maintenance. 1) Multi-room --> Many pipes and lines 2) Branch box --> Pipes and line 3) Increased power supply points --> Outdoor units and branch boxes - The conditions of each lines are automatically checked. - Controller in outdoor units. - 7-segment lamp in outdoor units. Check operation - Lines and pipes of branch boxes are automatically checked.
2) Hybrid Flex Inverter System, error codes Error code display Indoor unit Indoor units lamps, flashing of operation and timer lamps. and continuous flashing of economy lamp.
Case3 : Error at construction After performing the below-described work, repairs, inspections etc., always carry out the Check operation. Normal operation will not be possible without performing the Check operation. 1. Things to comfirm before starting the Check operation To ensure safety, check that the following work, inspections and operations have been completed.
4. Error display ( Error display 7 seg. display Error item : Blinking, : Off) LED lamp Indeterminable The external or room temperature is outside the operablerange. The air conditioner will temporarily permit normal operation, but the Check run should be carried out again at a later date when the temperatures are within the operable ranges. Wiring number error The number of wirings between indoor unit and branch box is not correct. Turn off all the units, and check number of connected wires.
2-2 NORMAL OPERATION 2-2-1 Normal status for Indoor Unit Display Indication type Indication Lamp Flashing Pattern Operation Operation LED Continuous lighting Timer Timer LED Continuous lighting 0.8 sec 21 sec Filter Sign Economy LED ON OFF 1 cycle Operation LED ON OFF Timer LED ON OFF 0.5 sec 0.5 sec Power Failure Test Operation Operation LED Compulsion Cooling Timer LED ON OFF Defrosting ON OFF Operation LED ON OFF 0.
2-2-2 Normal status for Outdoor Unit Display Indication type 7 Segment LED Pattern Description Idling(stop) Blank Cooling Mode During Cooling Mode "C" OO "L" During Heating Mode Heating Mode "H" EA "T" Oil Recovery Operation During Oil Recovery Operation "O" IL "R" ECOVERY During Defrost Operation Defrost Operation "D" E "F" ROST During Power Saving Operation Power Saving Operation "P" eak "C" ut Low Noise Operation During Low Noise Operation "L" OW "N" OISE 2-2-3.
2-3 ABNORMAL OPERATION 2-3-1 Error status for Indoor Unit Display Please refer the flashing pattern as follows. The OPERATION, TIMER, ECONOMY lamps operate as follows according to the error contents.
Trouble shooting Error Contents Operation LED Timer LED Economy LED Sub-Cool Heat Ex.Gas Inlet Thermistor Error Sub-Cool Heat Ex.
2-3-2 Remote Controller Display << SIMPLE REMOTE CONTROLLER >> ERROR CODE DISPLAY Error code If an error occurs, the following display will be shown. (“ “ will appear in the set room temperature display.) “ is displayed, immediately contact authorized If “ service personnel. Faulty unit No. (Remote controller address) Ex. Error code display << WIRED REMOTE CONTROLLER >> ERROR CODE DISPLAY If an error occurs, the following display will be shown. (“ “ will appear in the set room temperature display.
2-3-3 Error Code List for Simple and Wired Remote Controller Error Code Error Contents Trouble shooting 1 1 Serial Communication Error 1 2 Wired Remote Controller Communication Error 1 5 Check Run Unfinished 2 1 Number of Wires and Pipes Error 2 2 Indoor Unit Capacity Error 4 2 3 Connected Combination Error 5 2 4 Number of Indoor Units Error Number of Branch boxes Error 6, 7 3 2 Indoor Unit Model Information Error EEPROM Access Abnormal 8 3 5 Manual Auto Switch Error 9 4 1 Indoor
2-3-4 Outdoor Unit Display LED display ON POWER MODE POWER MODE LED : on ERROR LED : flashing ERROR POWER LED981 OFF LED981 LED982 (GREEN) (RED) 0.1sec LED962 LED961 ON ERROR LED982 OFF Operation button MODE EXIT SW931 SELECT ENTER CHECK SW932 SW933 SW934 ERROR transition Annunciation "Err." and quantity are alternately shown.
Indication type 7 Segment LED Pattern Description Idling(stop) Blank During Cooling mode Cooling mode "C" OO "L" During Heating mode Heating mode "H" EA "T" During Oil recovery operation. Refer to 01-25 page for operation. Oil recovery operation "O" IL "R" ECOVERY During Defrost operation. Refer to 01-22 page for operation. Defrost operation "D" E "F" ROST During Power saving operation. Refer to 01-29 page for operation. Power saving operation "P" eak "C" ut During Low noise operation.
2-3-5 Error Code List for Outdoor Unit Display Error Code Error Contents Trouble shooting Error Code Error Contents Trouble shooting E. 1 1. 3 Serial communication error 1, 37 ~ 39 E. 8 2. 1 Sub cool heat EX. gas inlet thermistor error 23 E. 1 1. 4 Serial communication error 1, 37 ~ 39 E. 8 2. 2 Sub cool heat EX. gas outlet thermistor error 24 E. 1 5. 6 Check run unfinished E. 8 3. 1 Liquid pipe thermistor error 25 E. 8 4. 1 Current sensor error 26 3 E. 2 1.
2-3-6 Error status for Branch Box Display When an error occurs, an error description displays in the LED (No.401 - 405).
Error Indication Flashing Pattern Example : "Serial communication error between Indoor Unit B and branch box" at Secondary unit1 (LED401: 2times, LED402: 5times, LED403: Unlit, LED404: Lit, LED405: Unlit) 1 cycle ON 0.5s 0.5s 0.5s LED401 0.5s + 1.0s OFF ON LED402 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s + 1.0s OFF ON LED403 OFF ON LED404 0.5s + 1.
2-4 TROUBLE SHOOTING Indicate or Display: Trouble shooting 1 Outdoor Unit : ALL UNIT Error Method: Indoor Unit : Refer to Connection line and Serial signal error list Serial Communication Error Error Code : (Page 13 ) (Serial Forward / Reverse Transfer Error) Detective Actuators: Detective details: Outdoor Unit Indoor Unit Branch Box (Primary / secondary) When the branch box cannot properly receive the serial signal from Outdoor unit / Indoor unit / Branch Box.
Case 2. When more than one indoor unit error (2unit or 3 unit) Check the error display of each Branch Box (Primary or Secondary) Replace Controller PCB of Branch Box (Primary or Secondary) of error and execute the check operation again. NG Check the error display of Indoor unit Replace Controller PCB of indoor unit of error Case 3. When all indoor unit error Replace Controller PCB Replace Controller PCB of Branch Box(Primary) and execute the check operation again.
Connection Line (example) Indoor unit 2 Indoor unit 5 ② Ａ ① ⑤ ③ Ｂ ⑥ Ｄ ④ Ｃ Indoor unit 8 Indoor unit 7 Indoor unit 6 Indoor unit 4 Indoor unit 3 Indoor unit 1 ⑧ Ｇ Ｅ ⑦ Ｆ Ｈ ⑨ Branch Box (Primary) ⑪ Branch Box 1 (secondary) Ｉ ⑩ Ｋ Outdoor unit ① Ａ Branch Box 2 (secondary) J 〜 ⑪ Serial Forward Transfer Error 〜 Ｋ Serial Reverse Transfer Error Serial signal error list Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 7 Indoor unit 8 Bra
Trouble shooting 2 INDOOR UNIT Error Method: Wired Remote Controller Communication Error Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 1 2 Detective Actuators: Detective details: Indoor unit controller PCB Wired Remote Controller Upon receiving the signal more than 1 time from Wired Remote or other Indoor unit, but the same signal has not been received more than 1 minute. Forecast of Cause : 1.
Trouble shooting 3 INDOOR UNIT Error Method: Check run unfinished Detective Actuators: Outdoor unit Branch BOX Indicate or Display: Outdoor Unit : E. 15. 6 Indoor Unit : Operation LED 1 times Flash, Timer LED 5 Times Flash, Economy LED Continuous Flash. Error Code : 15 Detective details: When the operation command is input by remote controller without check operation completion. Forecast of Cause : 1. Check operation not complete 2. Outdoor Main PCB changed 3.
Trouble shooting 4 INDOOR UNIT Error Method: Indoor Unit Capacity Error Indicate or Display: Outdoor Unit : E. 22. 1 Indoor Unit : Operation LED 2 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 22 Detective Actuators: Detective details: When the total capacity of indoor units is outside of range between 38,000BTU and 63,000BTU. All indoor unit Forecast of Cause : 1. The selection of indoor units is incorrect 2.
Trouble shooting 5 INDOOR UNIT Error Method: Connected Combination Error Detective Actuators: Indoor Unit Branch Box Indicate or Display: Outdoor Unit : E.5 U.1 or E.J 2.U Indoor Unit : Operation LED 2 times Flash, Timer LED 3 Times Flash, Economy LED Continuous Flash. Error Code : 2 3 Detective details: When power is on and one of the below occurs. 1. When the wirring is mistake 2. When the connection outdoor unit different. 3. When the connection indoor unit of unsupported multi. Forecast of Cause: 1.
Trouble shooting 6 INDOOR UNIT Error Method: Number of Indoor Units Error Detective Actuators: Indoor Unit Indicate or Display: Outdoor Unit : E. 24. 2 Indoor Unit : Operation LED 2 times Flash, Timer LED 4 Times Flash, Economy LED Continuous Flash. Error Code : 24 Detective details: When the total connection number of indoor units is outside of range between 2 and 8. Forecast of Cause : 1.
Trouble shooting 7 Branch Box Error Method: Number of Branch Boxes Error Detective Actuators: Indicate or Display: Outdoor Unit : E. 24. 3 Indoor Unit : Operation LED 2 times Flash, Timer LED 4 Times Flash, Economy LED Continuous Flash. Error Code : 24 Detective details: When the number of branch boxes and are different, and the operation command is input to the outdoor unit. Branch Box Memorized number at the check operation. Number of Serial forward signal. Forecast of Cause : 1.
Trouble shooting 8 INDOOR UNIT Error Method: Indoor Unit Model Information Error EEPROM Access Abnormal Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 3 2 Detective details: Detective Actuators: Indoor Unit Forecast of Cause : 1. External cause 3 continuous failure of read test of EEPROM at power on, or apparent model information error from EEPROM.
Trouble shooting 9 INDOOR UNIT Error Method: Manual Auto Switch Error Indicate or Display: Outdoor Unit : No Display Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 3 5 Detective Actuators: Detective details: Indoor Unit Controller PCB Indicator PCB Manual Auto Switch When the Manual Auto Switch becomes ON for consecutive 30 or more seconds. Forecast of Cause : 1. Manual Auto Switch failure 2.
Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 4 times Flash, Timer LED 1 Times Flash, Economy LED Continuous Flash. Error Code : 4 1 Trouble shooting 10 INDOOR UNIT Error Method: Indoor Room Thermistor Error Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit Indoor Temperature Thermistor Indoor unit thermistor is open or short is detected always. Forecast of Cause : 1. Connector failure connection 2. Thermistor failure 3.
Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 4 2 Trouble shooting 11 INDOOR UNIT Error Method: Indoor Heat Ex. Thermistor Error Detective Actuators: Detective details: Indoor Unit Controller PCB Heat Exchanger (MID) Thermistor Indoor unit thermistor is open or short is detected always. Forecast of Cause : 1. Connector failure connection 2. Thermistor failure 3.
Trouble shooting 12 INDOOR UNIT Error Method: Indoor Unit Fan Motor Error Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 5 times Flash, Timer LED 1 Times Flash, Economy LED Continuous Flash.
Trouble shooting 13 INDOOR UNIT Error Method: Drainage Error Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 5 times Flash, Timer LED 3 Times Flash, Economy LED Continuous Flash. Error Code : 5 3 Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit Float Switch When Float switch is ON for more than 3 minutes. Forecast of Cause : 1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure 4. Drain pump failure 5.
Trouble shooting 14 OUTDOOR UNIT Error Method: Outdoor Unit Model Information Error Detective Actuators: Detective details: Access to EEPROM failed due to some cause after outdoor unit started. Outdoor unit Main PCB Forecast of Cause : Indicate or Display: Outdoor Unit : E. 62. 1 Indoor Unit : Operation LED 6 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 62 1. External cause (Noise, temporary open, voltage drop) 2.
Trouble shooting 15 OUTDOOR UNIT Error Method: Inverter Error Indicate or Display: Outdoor Unit : E. 63. 1 Indoor Unit : Operation LED 6 times Flash, Timer LED 3 Times Flash, Economy LED Continuous Flash. Error Code : 63 Detective Actuators: Detective details: Inverter PCB Main PCB Filter PCB Error information received from Inverter PCB Forecast of Cause : 1. External cause 2. Power supply line & Communication line to Filter PCB to Inverter PCB wiring disconnection, open 3. Inverter PCB failure 4.
Indicate or Display: Outdoor Unit : E. 64. 1 Indoor Unit : Operation LED 6 times Flash, Timer LED 4 Times Flash Economy LED Continuous Flash. Error Code : 64 Trouble shooting 16 OUTDOOR UNIT Error Method: A.F Voltage Error Detective Actuators: Detective details: Outdoor Unit Main PCB Outdoor Unit ACTPM PCB Inverter low voltage protection Inverter overvoltage protection Forecast of Cause : 1. Connector connection failure 2. Inverter PCB failure 3.
Trouble shooting 17 OUTDOOR UNIT Error Method: Discharge Thermistor Error Detective Actuators: Indicate or Display: Outdoor Unit : E. 71. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED Times Flash, Economy LED Continuous Flash. Error Code : 71 Detective details: Discharge temperature thermistor Forecast of Cause : Discharge temperature thermistor short detected Discharge thermistor open detected 1. Connector connection failure, open 2. Thermistor failure 3.
Trouble shooting 18 OUTDOOR UNIT Error Method: Compressor Thermistor Error Detective Actuators: Detective details: Compressor temperature thermistor Forecast of Cause : Indicate or Display: Outdoor Unit : E. 72. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 72 Compressor temperature thermistor short detected Compressor thermistor open detected 1. Connector connection failure, open 2. Thermistor failure 3.
Trouble shooting 19 OUTDOOR UNIT Error Method: Heat Ex. Liquid Outlet Temp. Thermistor Error Indicate or Display: Outdoor Unit : E. 73. 3 Indoor Unit : Operation LED 7 times Flash, Timer LED 3 Times Flash, Economy LED Continuous Flash. Error Code : 73 Detective Actuators: Detective details: Heat exchanger liquid temperature thermistor Forecast of Cause : Heat exchanger outlet temperature thermistor short or open detected 1. Connector connection defective, open 2. Thermistor failure 3.
Trouble shooting 20 OUTDOOR UNIT Error Method: Outdoor Thermistor Error Detective Actuators: Detective details: Outdoor temperature thermistor Forecast of Cause : Indicate or Display: Outdoor Unit : E. 74. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 4 Times Flash, Economy LED Continuous Flash. Error Code : 74 Outdoor temperature thermistor short or open detected 1. Connector connection defective, open 2. Thermistor failure 3.
Trouble shooting 21 OUTDOOR UNIT Error Method: Suction Gas Thermistor Error Detective Actuators: Indicate or Display: Outdoor Unit : E. 75. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 5 Times Flash, Economy LED Continuous Flash. Error Code : 75 Detective details: Suction gas temperature thermistor Forecast of Cause : Suction gas temperature thermistor short or open detected 1. Connector connection defective, open 2. Thermistor failure3.
Trouble shooting 22 OUTDOOR UNIT Error Method: Heat Sink Thermistor Error Detective Actuators: Inverter PCB Forecast of Cause : Indicate or Display: Outdoor Unit : E. 77. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 7 Times Flash, Economy LED Continuous Flash. Error Code : 77 Detective details: Heat sink temperature thermistor (Built-in IPM) open/short detected 1.
Trouble shooting 23 OUTDOOR UNIT Error Method: Sub-cool Heat EX. Gas Inlet Thermistor Error Indicate or Display: Outdoor Unit : E. 82. 1 Indoor Unit : Operation LED 8 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 82 Detective Actuators: Detective details: Sub-cooling heat exchanger gas inlet temperature thermistor Forecast of Cause : Sub-cooling heat exchanger gas inlet temperature thermistor short or open detected 1. Connector connection defective, open 2.
Sub-cool Heat Ex. Gas Outlet Thermistor Error Indicate or Display: Outdoor Unit : E. 82. 2 Indoor Unit : Operation LED 8 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 82 Detective Actuators: Detective details: Trouble shooting 24 OUTDOOR UNIT Error Method: Sub-cooling heat exchanger gas outlet temperture thermistor Forecast of Cause : Sub-cooling heat exchanger gas outlet temperture thermistor short or open detected 1. Connector connection failur, open 2.
Trouble shooting 25 OUTDOOR UNIT Error Method: Liquid Pipe Thermistor Error Detective Actuators: Indicate or Display: Outdoor Unit : E. 83. 1 Indoor Unit : Operation LED 8 times Flash, Timer LED 3 Times Flash, Economy LED Continuous Flash. Error Code : 83 Detective details: Heat exchanger liquid outlet thermistor Forecast of Cause : Heat exchanger liquid pipe thermistor short or open detected 1. Connector connection failur, open 2. Thermistor failure 3.
Trouble shooting 26 OUTDOOR UNIT Error Method: Current Sensor Error Detective Actuators: Detective details: Judgment from value sensed by current sensor (current sensor for inverter) * Current sensor is mounted on Filter PCB Forecast of Cause : Indicate or Display: Outdoor Unit : E. 84. 1 Indoor Unit : Operation LED 8 times Flash, Timer LED 4 Times Flash, Economy LED Continuous Flash.
Trouble shooting 27 OUTDOOR UNIT Error Method: Discharge Pressure Sensor Error Detective details: Detective Actuators: When any of the following conditions is satisfied, a discharge pressure sensor error is generated. 1. 30 seconds or more have elapsed since the outdoor unit power was turned on and pressure sensor detected value 0.3V continued for 30 seconds or more 2. 30 seconds or more have elapsed since the outdoor unit power was turned on and pressure sensor detected value 5.0V was detected.
Trouble shooting 28 OUTDOOR UNIT Error Method: Suction Pressure Sensor Error Detective details: Detective Actuators: When any of the following conditions is satisfied, a suction pressure sensor error is generated. 1. 30 seconds or more have elapsed since the outdoor unit power was turned on and pressure sensor detected value 0.06V continued for 30 seconds or more. 2. 30 seconds or more have elapsed since the outdoor unit power was turned on and pressure sensor detected value 5.0V was detected.
Indicate or Display: Outdoor Unit : E. 86. 4 Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash, Economy LED Continuous Flash. Error Code : 86 Trouble shooting 29 OUTDOOR UNIT Error Method: High Pressure Switch Error Detective Actuators: Detective details: High pressure switch When the power was turned on, "high pressure switch : open" was detected. Forecast of Cause : 1. High pressure switch connector disconnection, open 2. High pressure switch characteristics failure3.
Trouble shooting 30 OUTDOOR UNIT Error Method: Over Current Error Detective Actuators: Inverter PCB Indicate or Display: Outdoor Unit : E. 94. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 4 Times Flash, Economy LED Continuous Flash. Error Code : 94 Detective details: "Protection stop by "overcurrent generation after inverter compressor start processing completed'''' generated consecutively 10 times. * The number of generations is reset if the start-up of the compressor succeeds.
Indicate or Display: Outdoor Unit : E. 95. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 5 Times Flash Economy LED Continuous Flash. Error Code : 95 Trouble shooting 31 OUTDOOR UNIT Error Method: Compressor Control Error Detective Actuators: Detective details: When "compressor location detection error" is detected consecutively 5 times, within 40 seconds after start-up. (Compressor location detection becomes over than 90°) Outdoor Unit Inverter PCBCompressor Forecast of Cause : 1.
Trouble shooting 32 OUTDOOR UNIT Error Method: Outdoor Unit Fan Motor Error Indicate or Display: Outdoor Unit : E. 97. 3 Indoor Unit : Operation LED 9 times Flash, Timer LED 7 Times Flash, Economy LED Continuous Flash. Error Code : 97 Detective details: Detective Actuators: Outdoor unit fan motor Outdoor unit Main PCB When fan speed 100rpm within 20 seconds after fan motor operation issued, fan motor is stopped by protection stop.
Indicate or Display: Outdoor Unit : E. 99. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 9 Times Flash Economy LED Continuous Flash.
Trouble shooting 34 OUTDOOR UNIT Error Method: Discharge Temp. Error Detective Actuators: Indicate or Display: Outdoor Unit : E. A1. 1 Indoor Unit : Operation LED 10 times Flash, Timer LED 1 Times Flash, Economy LED Continuous Flash. Error Code : A1 Detective details: Discharge temperature thermistor "Protection stop by "discharge temperature 239degF during compressor operation'''' generated 2 times within 24 hours. Forecast of Cause : 1. 3-way valve not opened 2. EEV defective, strainer clogged 3.
Trouble shooting 35 OUTDOOR UNIT Error Method: Compressor Temp. Error Detective Actuators: Indicate or Display: Outdoor Unit : E. A3. 1 Indoor Unit : Operation LED 10 times Flash, Timer LED 3 Times Flash, Economy LED Continuous Flash. Error Code : A3 Detective details: Compressor temperature thermistor "Protection stop by "compressor tempreture" operation""generated 2 times within 24 hours 233degF during compressor Forecast of Cause : 1. 3-way valve not opened 2. EEV defective, strainer clogged 3.
Trouble shooting 36 OUTDOOR UNIT Error Method: Low Pressure Error Detective Actuators: Indicate or Display: Outdoor Unit : E. A5. 1 Indoor Unit : Operation LED 10 times Flash, Timer LED 5 Times Flash, Economy LED Continuous Flash. Error Code : A5 Detective details: Suction pressure sensor "Protection stop by suction pressure repeats 5 times within 2 hours. 7.35PSI continued for 5 minutes" Forecast of Cause : 1. 3-way valve not opened 2. Outdoor unit ambient temperature too low 3.
Trouble shooting 37 Branch Box Error Method: Indicate or Display: Outdoor Unit : E. 11. 3 Connected combination error Branch Box : LED401/ 402/ 403/ 404/ 405 Lit Detective Actuators: Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF) Error Code : 11 Detective details: Outdoor unit When another outdoor unit in the future is connected to the terminal "Outdoor unit" of Primary branch box. Forecast of Cause : 1.
Trouble shooting 38 Branch Box Error Method: Indicate or Display: Outdoor Unit : E. 11. 3 or E. 11. 4 Power frequency error 1 Branch Box : LED401/ 402/ 403/ 404 Lit, LED405 Unlit Detective Actuators: Branch Box Controller PCB Forecast of Cause : 1. Connection failure Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF) Error Code : 11 Detective details: When 4 continuous failures occurred at Power frequency test.
Trouble shooting 39 Branch Box Error Method: Power frequency error 2 Indicate or Display: Outdoor Unit : E. 11. 3 or E. 11. 4 Branch Box : LED401/ 402/ 403 Lit, LED404 Unlit, LED405 Lit Indoor Unit Error Code Detective Actuators: Branch Box Controller PCB Outdoor unit Main PCB Outdoor Filter PCB Forecast of Cause : : Operation LED 1times Flash, Timer LED 1times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF) : 11 Detective details: When 4 continuous failures occurred at Power frequency test.
Trouble shooting 40 Branch Box Error Method: Indicate or Display: Outdoor Unit : E. J2. U EEPROM access error Branch Box : LED402 1time Flash, LED403/ 404/ 405 Unlit Detective Actuators: : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF) Error Code : J2 Detective details: When power is on and the access to EEPROM failed. Branch Box Controller PCB Forecast of Cause : 1. External cause Indoor Unit 2.
Trouble shooting 41 Branch Box Error Method: Indicate or Display: Outdoor Unit : E. J2. U Model information error Branch Box : LED402 2times Flash, LED403/ 404/ 405 Unlit Detective Actuators: : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF) Error Code : J2 Detective details: When power is on and model information of EEPROM is incorrect. Branch Box Controller PCB Forecast of Cause : 1. External cause Indoor Unit 2.
Trouble shooting 42 Branch Box Error Method: Indicate or Display: Outdoor Unit : E. J2. U Indoor Unit A, B, C, liquid pipe thermistor error (CN309 / 310) Branch Box : LED402 6times Flash (Indoor unit A): LED403 Lit, LED404/ 405 Unlit (Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit (Indoor unit C): LED403/ 404 Unlit, LED405 Lit Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.
Trouble shooting 43 Branch Box Error Method: Indicate or Display: Outdoor Unit : E. J2. U Indoor Unit A, B, C, gas pipe thermistor error (CN309 / 310) Branch Box : LED402 7times Flash (Indoor unit A): LED403 Lit, LED404/ 405 Unlit (Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit (Indoor unit C): LED403/ 404 Unlit, LED405 Lit Detective Actuators: Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.
Indicate or Display: Outdoor Unit : E. J2. U Trouble shooting 44 Branch Box Error Method: Indoor Unit A, B, C, EEV control error Branch Box : LED402 8times Flash (Indoor unit A): LED403 Lit, LED404/ 405 Unlit (CN305 / 306 / 307) (Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit (Indoor unit C): LED403/ 404 Unlit, LED405 Lit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.
OK Check Point 4 : Check Noise at start up Turn on Power and check operation noise. >> If an abnormal noise does not show, replace Controller PCB. OK Check Point 5 : Check Opening and Closing Operation of Valve If it is open, it has no temp. difference between Inlet and Outlet. When Valve is closed, it has a temp. difference between Inlet and Outlet. CLOSE OPEN Example : Hot Gas Example : Hot Gas Pipe (In) Pipe (In) Hi TEMP. Hi TEMP. Pipe (Out) Pipe (Out) Normal TEMP. Hi TEMP.
Trouble shooting 45 Branch Box Error Method: Indicate or Display: Outdoor Unit : E. J2. U Remote controller communication error Branch Box : LED402 9times Flash, LED403/ 404/ 405 unlit Detective Actuators: Branch Box Controller PCB Home controller Forecast of Cause : Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.
Trouble shooting 46 OUTDOOR UNIT Error Method: Display P.C.B. Communication Error Detective Actuators: Detective details: Outdoor unit Main PCB Outdoor unit I/O PCB Forecast of Cause : Indicate or Display: Outdoor Unit : E. 6A. 1 Indoor Unit : Operation LED 6 times Flash, Timer LED 10 Times Flash, Economy LED Continuous Flash. Error Code : 6A Communication not received from I/O PCB for 10 seconds or more 1. Main to I/O PCBs wiring connection defective 2. I/O PCB defective 3.
Trouble shooting 47-1 INDOOR UNIT Error Method: Damper error Indicate or Display: (Damper(Open/Close) detection Limit switch error) Outdoor Unit : E. 5U. 1 Indoor Unit : Operation LED 5 times Flash, Timer LED 7 Times Flash, Economy LED Continuous Flash. Error Code : 57 Detective details: Detective Actuators: When limit switch were not able to detect the close though the damper close. (Upper air flow) When limit switch were not able to detect the open though the damper open.
Trouble shooting 47-2 INDOOR UNIT Error Method: Damper error Indicate or Display: (Damper(Open/Close) simultaneous detection Limit switch error) Outdoor Unit : E. 5U. 1 Indoor Unit : Operation LED 5 times Flash, Timer LED 7 Times Flash, Economy LED Continuous Flash. Error Code : 57 Detective details: Detective Actuators: When the limit switch detects open and close at the simultaneous. Indoor unit Controller PCB Limit switch Forecast of Cause : 1. Limit switch failure 2. Shorted connector/ wire 3.
Trouble shooting 48 INDOOR UNIT Error Method: Indicate or Display: Outdoor Unit : E. 5U. 1 Indoor Unit : Operation LED 5 times Flash, Timer LED 8 Times Flash, Economy LED Continuous Flash. Error Code : 58 Intake Grille Error Detective details: Detective Actuators: When the Micro switch is detected open while running the compressor. Indoor unit Controller PCB Micro switch Forecast of Cause : 1. Micro switch failure 2. Shorted connector/ wire 3.
2-5 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor (If outdoor unit LED displays error, refer to Trouble shooting ) Does not start up Is there open or loose connection cable? Check connection of Compressor,and winding resistance. (Refer to the next page).
SERVICE PARTS INFORMATION 2 Compressor Check Point 1 : Check connection Check terminal connection of Compressor (Loose or incorrect wiring) Check connection of Inverter PCB (Loose or incorrect wiring) Inverter PCB TM400 (RED) TM401 (WHITE) TM402 (BLACK) C(T) : BLACK compressor R: RED S: WHITE Check Point 2 : Check winding resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor. C(T) Resistance value : 0.
SERVICE PARTS INFORMATION 3 Outdoor Unit Electronic Expansion Valve (EEV1) CN111 Check connection of connector (CN111) (Loose connector or open cable) EEV1 CN112 Check Point 1 : Check Connections EEV2 Check Point 3 : Check Voltage from Controller PCB Check Point 2 : Check Coil of EEV Remove connector, check each winding resistance of Coil. Read wire Resistance value (68°F) Remove Connector and check Voltage (DC12V). >> If it does not appear, replace Controller PCB.
SERVICE PARTS INFORMATION 4 Outdoor Unit Electronic Expansion Valve (EEV2) CN111 Check connection of connector (CN112) (Loose connector or open cable) EEV1 CN112 Check Point 1 : Check Connections EEV2 Check Point 3 : Check Voltage from Controller PCB Check Point 2 : Check Coil of EEV Remove connector, check each winding resistance of Coil. Read wire Resistance value (68°F) Remove Connector and check Voltage (DC12V). >> If it does not appear, replace Controller PCB.
SERVICE PARTS INFORMATION 5 Thermistor Check Point : Check Thermistor resistance value Remove connector and check Thermistor resistance value. Temperature [°F] -4 14 23 32 41 50 59 68 77 86 104 122 140 158 176 194 212 230 248 Thermistor A ------168.6 129.8 100.9 79.1 62.6 49.8 40.0 26.3 17.8 12.3 8.7 6.3 4.6 3.4 2.6 2.0 Applicable Thermistors Discharge temp. TH Comprssor temp. TH Resistance Value [ k ] Thermistor B Thermistor C --105.4 27.8 58.2 21.0 44.0 16.1 33.6 12.4 25.9 9.6 20.2 7.6 15.8 6.0 12.
SERVICE PARTS INFORMATION 6 Discharge Pressure Sensor Suction Pressure Sensor 1. Discharge Pressure Sensor Check Point : Check Voltage from Main PCB With the connector connected to the PCB, measure the voltage between CN91:3-4 of the Main PCB. DC CN91 DC 1 2 3 4 RED 1 2 WHITE 3 BLACK 4 PS PRESSURE SENSOR (HIGH) Output [DCV] Characteristics of pressure sensor 4.5 2.5 0.5 0 735 368 Pressure [PSI] 2.
SERVICE PARTS INFORMATION 7 Outdoor Fan Motor Check Point 1 : Check rotation of Fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) >>If Fan or Bearing is abnormal, replace it. Check Point 2 : Check resistance of Outdoor fan motor Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Earth terminal) >>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.
SERVICE PARTS INFORMATION 8 Active Filter Module Check Point 1 : Check Open or Short-circuit and Diode Remove connector, check the open or short-circuit and the diode in the module Check the open or short-circuit Terminal L2 Tester(+) P Resistance value Tester(-) L1 (+IN) (+IN) ( IN) ( IN) N P (+IN) L1 L2 P N L1,L2 Control Box L2 N 360k + 20% - 0 N ( IN) 900k + 20% - 2.03M -+ 20% / 4.83M -+ 20% (Ref. value 1) 540k (Ref. value 2) + 20% - 1.69M -+ 20% / 1.23M -+ 20% (Ref.
SERVICE PARTS INFORMATION INFORMATION10 3 Diode Bridge (on the Inverter PCB) Check Point 1: Check OPEN / SHORT of Diode Bridge Remove each terminal, and check open / short of the Diode Bridge.
