TROUBLE SHOOTING Cycle Part 1 Error Display 1

TROUBLE SHOOTING (Cycle Part) 1. Error Display 1) The Meaning of the First Alphabet E P Error concluded by self-diagnosis U A The address of Outdoor Unit occurred error Pre Error Code P 701~P 800 E 101~E 700 Items that need more than Detailed item refers error 2 times detection to code conclude through error U 200 : Main Unit U 201 : Sub 1 Unit U 202 : Sub 2 Unit U 203 : Sub 3 Unit The address of Indoor Unit occurred error A 047 : Error Occurred At Indoor Unit Whose address 47 2) Error Display method Error Type Error Display Method Examples Error Occurred at Indoor Unit Error Number →Address of Indoor unit → Error Number (repeat indication) E 471→A 002→E 471→A 002 Error Occurred at Outdoor Unit or Other Error Number →Address of Outdoor unit → Error Number (repeat indication) E 471→U 200→E 471→U 200 ○ In case of several Error should be registered at the same time, Indicator will display one error whose priority is highest. ( Refer Error Code Table to know priority order ) ○ When the same Error Occurred in several Indoor Units, Indicator will display one address of indoor unit whose address number is lowest.

TROUBLE SHOOTING (Cycle Part) Error Code (Priority Order) Error Details E 221 Short or Open of the Outdoor air temperature sensor E 251 Short or Open of the discharge temperature sensor of Digital compressor E 256 Short or Open of the discharge temperature sensor of Fixed compressor 1 E 257 Short or Open of the discharge temperature sensor of Fixed compressor 2 E 258 Short or Open of the discharge temperature sensor of Fixed compressor 3 E 291 Short or Open of the high pressure sensor E 296 Short or Open of the low pressure sensor E 271 Short or Open of the Sump. Temperature sensor of the compressor 1 E 231 Short or Open of the Cond. out temperature Sensor E 307 Short or Open of the Oil balance temperature Sensor 1 E 308 Short or Open of the Suction temperature sensor E 311 Short or Open of the sub cooler temperature sensor E 425 Reverse Phase or Phase Open E 452 Voltage Dip Error E 440 Stop Operating Heating mode when Outdoor temperature is over 30℃ E 442 Stop Operating Heating charging mode when Outdoor temperature is over 15℃ E 443 Stop Operation by Low Pressure E 431 Self diagnosis failure of Oil balance valve 1 E 202 No response error after tracking is completed E 201 Communication error among outdoor units and indoor units (Pre-tracking failure or setup indoor unit number is different from the real)

TROUBLE SHOOTING (Cycle Part) Error Code (Priority Order) Error Details E 203 Communication error between Outdoor unit’s main and sub MICOM or among outdoor Units E 407 Comp down By high pressure E 410 Comp down By low pressure E 403 Comp down By Anti-freezing control E 413 Comp down By Sump Protection Control E 554 Loading failure E 416 Comp down by compressor discharge temperature E 241 Cond. out temperature Sensor breakaway E 269 Suction temperature Sensor breakaway E 453 Error of Fan Motor’s high temperature E 454 Fan motor RPM Error E 455 Error of fan motor IPM high temperature E 458 CT over current E 457 Error of fan motor’s reverse revolution E 162 Outdoor Unit’s EEPROM Error E 560 Switch Option Set up Error E 428 Comp down by compression ratio control E 121 Short or Open of indoor unit’s air temperature sensor E 122 Indoor Unit EVA in Sensor’s Short or open E 123 Indoor Unit EVA out Sensor’s Short or open

TROUBLE SHOOTING (Cycle Part) Error Code (Priority Order) Error Details E 154 Indoor Unit’s Fan Error E 124 Communication error message sent from the indoor unit E 153 Indoor Unit Floating S/W error (2 nd check) P 701 Indoor Unit Floating S/W error (1 st check) E 152 Indoor Unit EEV Closing error (2 nd check) P 702 Indoor Unit EEV Closing error (1 st check) E 151 Indoor Unit EEV opening error (2 nd check) P 703 Indoor Unit EEV opening error (1 st check) E 128 Indoor Unit EVA in Sensor Breakaway E 129 Indoor Unit EVA Out Sensor Breakaway E 131 Indoor Unit Heater Sensor Breakaway E 265 Sump temperature Sensor of Digital Comp. or Fixed Comp. 1 Breakaway E 267 Fixed Comp. 2 Sump’s Temperature Sensor Breakaway E 268 Fixed Comp. 3 Sump’s Temperature Sensor Breakaway E 262 Fixed Comp. 1 Discharge’s Temperature Sensor Breakaway E 263 Fixed Comp. 2 Discharge’s Temperature Sensor Breakaway E 264 Fixed Comp. 3 Discharge’s Temperature Sensor Breakaway E 456 Fan Motor Over Current Error E 461 CT Low Current CH Stop Operating the unit when the crank case heater is on

TROUBLE SHOOTING (Cycle Part) E 440, E 442 : E 440 Stop Operating Heating mode when Outdoor temperature is over 30℃ E 442 Stop Operating Heating charging mode when Outdoor temperature is over 15℃ Decision Method E 440 : Just before outdoor unit operates in heating mode, Outdoor air temperature sensor reading over 30℃ E 442 : Just before outdoor unit operates in heating charging mode by key mode(K 1 S/W in the outdoor unit’s PCB ), Outdoor air temperature sensor reading over 15℃ Possible Cause It is not error of product. (spec. to protect products) It is desired that refer and use working conditions range of temperature. If the value of outdoor air temperature sensor is different from the real, please replace the outdoor air temperature sensor with new one.

TROUBLE SHOOTING (Cycle Part) E 443: E 443 Stop Operation by Low Pressure Decision Method If the low pressure of the main unit is below 3. 1 kgf/㎠G for 3 seconds continuously In cooling mode before Pump down start, Stop operation If the low pressure of the main unit is below 2. 6 kgf/㎠G for 3 seconds continuously In Heating mode before Pump down start, Stop operation Possible Cause Refrigerant Leakage Low pressure sensor breakdown Action 1. 2. 3. 4. Measure the low pressure using manifold gage Read the low pressure of the system using S-NET or View mode Compare the value of case 1 with case 2. If these value are similar, most of refrigerant is leaked. Please emit remainder refrigerant and do re-vacuum & re-charging 5. If these value are different greatly, please check the connector of the low pressure sensor or replace the low pressure sensor with new one Attention : After recovery of refrigerant (Pump down), because refrigerant fills only in outdoor heat exchanger, preceding descriptions error can arise. In this case, If you open service valve after connecting pipe normally with indoor unit, error will be eliminated because refrigerant circulates to low-pressure side.

TROUBLE SHOOTING (Cycle Part) E 431: E 431 Self diagnosis failure of Oil balance valve 1 Decision Method 1. No check in case that one outdoor unit is installed 2. In module application, check the condition of Oil balance valve 1 or senor breakaway 3. When hot gas engaged after close the Oil balance valve 1, if the temperature of oil balance tube arise over 5℃, display error (Valve Is not closed) 4. During Oil balance operation with the Oil balance valve 1 open, if the temperature of oil balance tube doesn’t change over 7℃, display error (Valve Is not open) Possible Cause Temperature Sensor of Oil balance valve 1 breakaway Malfunction of Oil balance valve 1 Solenoid coil of electric connection badness Action 1. 2. 3. 4. 5. 6. Check the temperature sensor is inserted correctly in sensor holder Check the value of the temperature sensor is proper Check the oil service valve is open Check the solenoid Coil of the valve is properly installed Check the resistance of the Coil (Was it not short-circuited? ) Replace the Oil Valve with new one Attention : Never use welding machine when cut off the oil valve, Do use Tube cutter. ( there is danger of production of fire because oil fills in pipe )

TROUBLE SHOOTING (Cycle Part) E 407: E 407 Comp down By high pressure Decision Method The Value of the high pressure sensor is over 41 kgf/㎠ Possible Cause <Cooling Mode> Outdoor Unit’s fan motor breakdown or restriction, Fan motor Driver wire is bad or open Outdoor Heat exchanger contamination, Service Valve is closed, Excessive refrigerant <Heating Mode> Indoor Unit’s fan motor breakdown or restriction Indoor unit’s fan motor capacitor badness or connecting wire open Service Valve is closed, Excessive refrigerant Action 1. Check the service valve is open 2. Check the value of the high pressure sensor is proper using manifold gage 3. Check the EEV of both indoor unit and outdoor unit 4. Check the fan operation 5. Confirm refrigerant quantity

TROUBLE SHOOTING (Cycle Part) E 410: E 410 Comp down By low pressure Decision Method If the low pressure of the main unit is below 2. 6 kgf/㎠G In cooling mode, Stop operation If the low pressure of the main unit is below 1. 4 kgf/㎠G In Heating mode, Stop operation Possible Cause Refrigerant shortage, EEV choked, Service valve Closed, Compressor Unloading badness, Leakage of discharge check valve of stopped unit Working conditions deviation ; Outdoor temperature is below -5℃ <Cooling Mode> Outdoor temperature is below -20℃ <heating Mode> Action 1. Check the service valve is open 2. Check the value of the low pressure sensor is proper using manifold gage 3. Check the EEV of both indoor unit and outdoor unit 4. Check the fan operation 5. Confirm refrigerant quantity

TROUBLE SHOOTING (Cycle Part) E 403: E 403 Comp down By Anti-freezing control Decision Method The temperature of the operating indoor unit’s heat exchanger keeps below -4℃ (more than 5 minutes) Possible Cause EEV does not work properly Indoor unit fan motor restriction or badness Air filter of the indoor unit is choked severely Action 1. 2. 3. 4. 5. Removes obstacle and cleans dust filter. Error reset (K 3) Operate the only relevant indoor unit and check the fan operation Check the PCB & motor Check the Pressure Confirm refrigerant quantity

TROUBLE SHOOTING (Cycle Part) E 413: E 413 Comp down By Sump Protection Control Decision Method The temperature of Sump keeps below 95℃ (more than 5 minutes) Possible Cause Compressor Loading badness Sump temperature sensor badness Action 1. 2. 3. 4. Connect the S-Net Check the operation of PWM Valve (normal loading/unloading) Check the attachment status of sump temperature sensor Take the sump sensor apart from the compressor and leave it alone in ambient air for about 10 minutes, and check the value of the sump sensor is similar with the ambient air temperature. 5. Replace sump sensor

TROUBLE SHOOTING (Cycle Part) E 416: E 416 Comp down by compressor discharge temperature Decision Method The value of discharge temperature sensor is over 135℃ Possible Cause Refrigerant Shortage, EEV Choking, Service valve is closed, Sensor badness, Liquid EEV badness, Liquid Tube Valve badness, Leakage of discharge check valve of stopped unit Action 1. Check the resistance of the discharge temperature sensor (refer E 251) 2. Check the Service Valve is open 3. Check the EEV Operation 4. In case of partial outdoor units are operated, Check leakage from liquid tube valve or discharge check valve of no-operating outdoor units 5. Confirm refrigerant quantity

TROUBLE SHOOTING (Cycle Part) E 241: E 241 Cond. out temperature Sensor breakaway Decision Method No Check in cooling mode In Heating mode, it must satisfy below conditions simultaneously (more than 20 min. ) 1. average high pressure : 25 kgf/㎠G 2. average low pressure : 8. 5 kgf/㎠G 3. Teva, out – Tair, in ≥ 3℃ 4. Teva, in – Tair, in ≥ 2℃ 5. Tcond, out – Tair, out ≤ -2℃ 6. All Compressor Operation & All indoor Unit operation (thermo on) Possible Cause Cond. Out sensor breakaway or badness Outdoor heat exchanger path pipe is choked Action 1. Check the temperature sensor is inserted correctly in sensor holder 2. Check the resistance of the discharge temperature sensor (refer E 231) 3. Is change in sensor value at heating operation after stop? Replace Heat exchanger assembly with new one.

TROUBLE SHOOTING (Cycle Part) E 269: E 269 Decision Method Suction temperature Sensor breakaway Tsuc, ini ; Suction temperature of the compressor on the verge of operation Tsuc, real ; Suction temperature of the compressor operating now | Tsuc, real - Tsuc, ini | ＜ 2℃ (more than 30 min. ) Possible Cause Suction temperature sensor breakaway or badness Action 1. Check the temperature sensor is inserted correctly in sensor holder 2. Check the resistance of the discharge temperature sensor (refer E 231)

TROUBLE SHOOTING (Cycle Part) E 458: E 458 CT over current Decision Method The CT value of the relevant compressor is over 20 A ( more than 5 sec. ) Possible Cause CT sensor badness Compressor Breakdown Action 1. Check the resistance of the CT sensor connector 2. Check the value of CT sensor is zero at stop 3. Compare the value of CT sensor with another measurement device 4. Replace the relevant compressor

TROUBLE SHOOTING (Cycle Part) E 428: E 428 Comp down by compression ratio control Decision Method (High pressure + 1) / (Low Pressure + 1) ≥ 8. 5 (more than 10 min. ) Possible Cause Pressure sensor badness EEV malfunction Pipe is clogged Action 1. Check the service valve is open 2. Check the value of the pressure sensor (S-Net or View mode) is proper using manifold gage 3. Check the operation of EEV (Outdoor units / indoor units) 4. Check pipe status 5. In case of partial outdoor units are operated, Check leakage from liquid tube valve or discharge check valve of no-operating outdoor units 6. Confirm refrigerant quantity

TROUBLE SHOOTING (Cycle Part) E 153: E 153 ↔ A*** Indoor Unit Floating S/W error (2 nd check) P 701 Indoor Unit Floating S/W error (1 st check) Decision Method Possible Cause Drain pump Breakdown Floating S/W malfunction Action 1. After separating Floating S/W connector, check the resistance of both ends of the Floating S/W is infinity. (OPEN when there is no water) 2. Check the supplied voltage to the Drain pump is proper. Replace PCB of Indoor Unit. 3. Check the operation of Drain pump Replace Drain pump of Indoor Unit. ※ After Service, Indoor unit should be reset by power supply

TROUBLE SHOOTING (Cycle Part) E 152: E 152 ↔ A*** Indoor Unit EEV Closing error (2 nd check) P 702 Indoor Unit EEV Closing error (1 st check) Decision Method In Cooling mode, it must satisfy below conditions simultaneously (more than 20 min. ) 1. Tcond, out – Tair, out ＞ 3℃ 2. Tair, in – Teva, in ＞ 4℃ 3. Tair, in – Teva, out ＞ 4℃ 4. Compressor is operating normally & relevant indoor Unit is ON (thermo on) In Heating mode, it must satisfy below conditions simultaneously (more than 3 min. ) 1. average high pressure : over 18 kgf/㎠G 2. after 5 minutes from safety start ends 3. more than 2 indoor unit are operating in heating mode (thermo on) 4. Tair, in – Teva, in ＞ -3℃ & Tair, in – Teva, out ＞ -3℃ Possible Cause Indoor unit’s EEV does not open Action 1. Check the EEV connector is inserted correctly in the indoor PCB 2. Check the EEV Coil is inserted correctly in the EEV body 3. Check the resistance of the coil 4. Replace EEV assembly with new one.

TROUBLE SHOOTING (Cycle Part) E 151: E 151 ↔ A*** Indoor Unit EEV opening error (2 nd check) P 703 Indoor Unit EEV opening error (1 st check) Decision Method No check In Heating mode In Cooling mode, it must satisfy below condition (more than 20 min. ) - Either Teva, in or Teva, out of stopped indoor unit is below to zero Possible Cause Indoor unit’s EEV does not close Action 1. Check the EEV connector is inserted correctly in the indoor PCB 2. Check the EEV Coil is inserted correctly in the EEV body 3. Check the resistance of the coil 4. Replace EEV assembly with new one.

TROUBLE SHOOTING (Cycle Part) E 128: E 128 ↔ A*** Indoor Unit EVA in Sensor Breakaway Decision Method In Cooling mode, it must satisfy below conditions simultaneously 1. Tcond, out – Tair, out ＞ 3℃ 2. Tair, in – Teva, in ≤ 4℃ * 3. Tair, in – Teva, out ＞ 4℃ 4. Compressor is operating normally & relevant indoor Unit is ON (thermo on) In Heating mode, it must satisfy below conditions simultaneously 1. average high pressure : over 25 kgf/㎠G 2. average low pressure : below 8. 2 kgf/㎠G 3. Tcond, out – Tair, out ＜ -2℃ 4. Teva, in - Tair, in ＜ 2℃ * 5. Teva, out - Tair, in ≥ 3℃ 6. Compressor is operating normally & relevant indoor Unit is ON (thermo on) Possible Cause Indoor unit’s Eva in sensor breakaway Action 1. Check the Eva in sensor is inserted correctly in the sensor holder

TROUBLE SHOOTING (Cycle Part) E 129: E 129 ↔ A*** Indoor Unit EVA out Sensor Breakaway Decision Method In Cooling mode, it must satisfy below conditions simultaneously 1. Tcond, out – Tair, out ＞ 3℃ 2. Tair, in – Teva, out ≤ 4℃ * 3. Tair, in – Teva, in ＞ 4℃ 4. Compressor is operating normally & relevant indoor Unit is ON (thermo on) In Heating mode, it must satisfy below conditions simultaneously 1. average high pressure : over 25 kgf/㎠G 2. average low pressure : below 8. 2 kgf/㎠G 3. Tcond, out – Tair, out ＜ -2℃ 4. Teva, out - Tair, in ＜ 3℃ * 5. Teva, in - Tair, in ≥ 2℃ 6. Compressor is operating normally & relevant indoor Unit is ON (thermo on) Possible Cause Indoor unit’s Eva out sensor breakaway Action 1. Check the Eva out sensor is inserted correctly in the sensor holder

TROUBLE SHOOTING (Cycle Part) E 265: E 265 Decision Method Sump temperature Sensor of Digital Comp. or Fixed Comp. 1 Breakaway Tsump, ini ; Sump temperature of the compressor on the verge of operation Tsump, real ; Sump temperature of the compressor operating now | Tsump, real - Tsump, ini | ＜ 2℃ (more than 60 min. ) No Check after 60 min. from starting operation Possible Cause Sump temperature sensor breakaway Action Check the attachment status of sump temperature sensor Note : Only Digital compressor or Fixed 1 compressor has the sump sensor

TROUBLE SHOOTING (Cycle Part) E 262, E 263, E 264: E 262 ↔ U*** Fixed Comp. 1 Discharge’s Temperature Sensor Breakaway E 263↔ U*** Fixed Comp. 2 Discharge’s Temperature Sensor Breakaway E 264↔ U*** Fixed Comp. 3 Discharge’s Temperature Sensor Breakaway Decision Method It must satisfy below condition (more than 30 min. ) 1. The CT sensor value of the relevant compressor is over 5 A 2. Discharge temperature ＜ Saturation temperature calculated with high pressure Possible Cause Compressor Discharge Temperature sensor breakaway Compressor Discharge Temperature sensor badness Action 1. Check the temperature sensor is inserted correctly in sensor holder Insert the sensor in the sensor holder 2. Check the resistance of the discharge temperature sensor (refer E 251) Replace the sensor 3. Check the sensor position corresponds to compressor correctly Change the sensor position correctly

TROUBLE SHOOTING (Cycle Part) E 461: E 461 CT low current Decision Method The CT value of the relevant compressor is below 4 A ( more than 10 min. ) Possible Cause CT sensor badness Compressor Breakdown OLP Trip Action 1. Check the resistance of the CT sensor connector 2. Check the value of CT sensor is zero at stop 3. Compare the value of CT sensor with another measurement device 4. Check whether OLP trip is occurred 5. Replace the relevant compressor

TROUBLE SHOOTING (Cycle Part) Vacuum Mode : Tact S/W K 1 7 -Segment display K 1 8 times Vacuum mode (Main) “K” “ 5” “M“ “BLANK“ K 1 9 times Vacuum mode (Sub 1) K” “ 5” “S“ “ 1“ K 1 10 times Vacuum mode (Sub 2) K” “ 5” “S“ “ 2“ K 1 11 times Vacuum mode (Sub 3) K” “ 5” “S“ “ 3“ K 1 12 times Vacuum mode (All) “K” “ 5” “A” “BLANK” Action Outdoor Units with vacuum mode set Outdoor EEV Liq. EEV Valves 4 way Valve Fully open Open Cooling mode Outdoor Units with normal mode set Outdoor EEV Liq. EEV Valves 4 way Valve Fully Closed Cooling mode In vacuum mode, 1. System operation is prohibited. 2. System does not execute both self diagnosis and protection control.

TROUBLE SHOOTING (Cycle Part) Pump down Mode : Tact S/W K 2 7 -Segment display K 2 3 times Pump down (All Unit) “K” “ 7” “BLANK“ K 2 3 times Pump down (Main) “K” “ 7” “M“ “BLANK“ K 2 3 times Pump down (Sub 1) “K” “ 7” “S“ “ 1“ K 2 3 times Pump down (Sub 2) “K” “ 7” “S“ “ 2“ K 2 3 times Pump down (Sub 3) “K” “ 7” “S“ “ 3“ How to pump down all units 1. 2. 3. 4. 5. Close the liquid service valve of all units Press Tact S/W K 2 3 times System start the pump down operation Outdoor unit that pump down is ended stops operation Close the gas service valve in order that operation stops ※ Pump down operation under long pipe installation is NOT desirable. Please Use adequate refrigerant recovery device.

TROUBLE SHOOTING (Cycle Part) Pump out Mode : Tact S/W K 1 7 -Segment display K 1 3 times Pump out Main “K” “ 3” “M“ “BLANK“ K 1 4 times Pump out Sub 1 K” “ 3” “S“ “ 1“ K 1 5 times Pump out Sub 2 K” “ 3” “S“ “ 2“ K 1 6 times Pump out Sub 3 K” “ 3” “S“ “ 3“ How to pump out Sub 1 unit (example) 1. 2. 3. 4. 5. 6. Close the liquid service valve of Sub 1 unit Press Tact S/W K 1 4 times Sub 1 Unit start the pump out operation Check low pressure in view mode(K 4 S/W) ; Do not operate system under 1. 6 kgf/㎠G (L. P. ) Close the gas service valve Press K 3 to reset the system

TROUBLE SHOOTING (Cycle Part) Disbranch breakdown compressor : DIP S/W K 6, K 7, K 8 ※ Should be set in individual unit S/W K 6 K 7 K 8 On Digital comp 1_main Fixed comp 1_sub 1 Fixed comp 1_sub 2 Normal Fixed comp 2_main Fixed comp 2_sub 1 Fixed comp 2_sub 2 Normal Fixed comp 3_main Fixed comp 3_sub 1 Fixed comp 3_sub 2 Normal Off Digital comp 1_main Fixed comp 1_sub 1 Fixed comp 1_sub 2 Disbranch Fixed comp 2_main Fixed comp 2_sub 1 Fixed comp 2_sub 2 Disbranch Fixed comp 3_main Fixed comp 3_sub 1 Fixed comp 3_sub 2 Disbranch How to Disbranch Compressor Sub 1 unit (example) Sub 1 1. 2. Set DIP S/W K 6 ON, K 7 OFF of Sub 1 Unit Press K 3 to reset the system Fixed comp. 2 is broken ※ It is temporary expedient and service is needed for long term operation

TROUBLE SHOOTING (Cycle Part) Monitoring Program : S-NET I+