12. Troubleshooting
Contents
1. i gt Reconnect the sensor connector correctly in accordance with a color Yes No lt Is the temperature sensor connected correctly without separation Po Change the position of sensor Yes Does the both terminal of sensor No satisfy the resistance No value in accordance with temperature po Exchange the sensor Refer to the R T TABLE Yes No Is the resistance value N R o of sensor connection pull_up 18 2K Exchange the PCB Yes Yy gt Exchange the PCB Y Normal operation y Exit Temperature Resistance 400 0 350 0 300 0 MAX KO s CENTER KQ 250 0 MIN kQ 200 0 150 0 Resistance kQ 100 0 0 0 Lemmni suiii rrr it ree ora ems Dee 12 11 m t TO mM N D mM Temperature C on Oo tT Mm no N OO BD O Samsung Electronics Troubleshooting 12 2 10 Fan error 1 Checklist 1 Isn t the fan locked 2 Is the sensor placed correctly 3 Does the both terminal of sensor satisfy the resistance value in accordance with temperature 4 Is the resistance value of sensor connection pull_up correct 2 Troubleshooting procedure Isn t the Fan locked ced Remove the Fan lock Yes No lt Is the connector connected correctly H Connect the connector Yes No Is the color of Fan wi2. Yes Is it the outdoor 2 Micom Inverter Main model Yes Exchange the outdoor unit PCB 1 Is the communication cable between the indoor unit and outdoor unit connected correctly 2 Isn t the power cable and communication cable error Terminate the service Correct the wrong wiring Correct the connection of communication cable Exchange the indoor outdoor unit PCB Samsung Electronics Troubleshooting 12 2 14 Compressor start error 1 Checklist 1 Is the connection of cable for the compressor and power 2 Is the interphase resistance of compressor normal 2 Troubleshooting procedure Restart after power off Is the restart error occurred again Terminate the service Is the interphase resistance value of No compressor u lt v vw wu normal Exchange the compressor Yes Is the compressor body and interphase resistance insulated Yes Is the connection cable for the No Correct the cable connection compressor and power terminal normal Yes Exchange the PCB Exchange the compressor Samsung Electronics 12 16 Troubleshooting 12 2 15 Compressor lock error 1 Checklist 1 Is the connection of cable for the compressor and power 2 Is the interphase resistance of compressor normal 2 Troubleshooting procedure Restar
3. Initial Diagnosis 1 Checklist 1 Is input voltage normal 2 Is the Up Down louver motor properly connected with the connector CN61 2 Troubleshooting procedure Unplug the power cord and plug it after 30 seconds Troubleshooting Is STD lamp blinking Check as in the procedure No Power Does operation start when swing button Yes ormai of the remote control unit pushed Voltage at pin 30 34 of micom IC04 change Squarewave Micom IC04 is faulty Voltage at pin 2 5 of CN61 motor connector Driver IC05 06 ULN2003A is faulty change Squarewave Up Down louver motor is faulty Samsung Electronics 12 4 Troubleshooting 12 2 4 The Outdoor unit Fan error 1 Checklist 1 Are the input power voltage and the power connection correct 2 Is the motor wire connected to the outdoor PCB correctly 3 Is there no assembly error or none assembly in the terminal of motor wire connector 4 Is there no obstacle at the surrounding of motor and propeller 2 Troubleshooting procedure Is the Pin voltage of CNO1 No Follow the Check Procedure of 1 3 over 250V outdoor unit power supply error check Yes Is the Pin voltage of CNO1 3 5 No Does the Pin voltage of ICO1 MICOM within 1V 5V during the operation No 13
4. change Square Wave Yes FAN DRIVE CIRCUIT Q901 Q902 etc error Yes Exchange the PCB y Is the Pin voltage of CNO1 6 changed No Pull out the power cord and gt during the operation Square Wave execute the following step after 30 seconds Yes y Exchange the PCB 12 5 Disassemble the BLDC FAN Wire Is the short between the BLDC FAN Wires Yes Exchange the BLDC FAN MOTOR No y Exchange the PCB v MICOM Error No gt Exchange the PCB Samsung Electronics 12 2 5 Total current Trip error 1 Checklist 1 Is the input power voltage proper 2 Is the refrigerant charged properly 3 Does the compressor rotate normally Reverse rotation Locking etc 5 Is the installation condition of outdoor unit good Piping Space etc 6 Is there no ventilation obstruction at the surrounding of outdoor Outdoor unit cover Fan front obstruction etc 4 Dose the outdoor fan operate normally Fan propeller loss Motor error etc 2 Troubleshooting procedure Is the installation of outdoor unit good Yes Dose the compressor rotate normally Yes E R Is the assembly of R418 R413 IC41 C437 and the peripheral part good Yes y Pull out the power cord and exchange the PCB from the case after 30 seconds Se Is the assem
5. outdoor PCB y Go to the next page 4 way valve main body error 12 7 Samsung Electronics Troubleshooting In case of heating at the cooling mode or cooling at the heating mode cont From the previous page Does the EEV operate normally Yes Does the outdoor fan Is much frost in the heat exchanger Connect the connector resistance value of EEV coil NG Check the EEV coil error if Is much frost in the heat exchanger Exchange the out PCB EEV main body error Yes The over shortage of refrigerant Insufficient operate at the operation of compressor ic Is the outdoor fan connected No y Capacity Load estimation error correctly Yes Check the resistance value NG gt Connect the connector of outdoor fan Dose the voltage of DC300V apply to the connector of outdoor Yes gt Outdoor fan error fan during the operation of outdoor unit Outdoor PCB error Samsung Electronics gt Check the motor wire 12 8 Troubleshooting 12 2 7 Outdoor temperature sensor error 1 Checklist 1 Is the sensor connector connected correctly 2 Is the sensor placed correctly 3 Does the both terminal of sensor satisfy the resistance value in acco
6. 12 Troubleshooting 12 1 Items to be checked first 1 The input voltage should be rating voltage 10 range The air conditioner may not operate properly if the voltage is out of this range 2 Is the link cable linking the indoor unit and the outdoor unit linked properly The indoor unit and the outdoor unit shall be linked by 5 cables Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables Otherwise the air conditioner may not operate properly 3 When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the air conditioner Operation of air conditioner Explanation The OPERATION indication LED BLUE blinks when a power It indicates power is on The LED stops blinking if the operation plug of the indoor unit is plugged in for the first time ON OFF button on the remote control unit is pushed In a COOL operation mode the compressor does not In happens after a delay of 3 minutes when the compressor is operate at a room temperature higher than the setting reoperated The same phenomenon occurs when a power is on temperature that the INDOOR FAN should operate As a phenomenon that the compressor is reoperated after a In case of heat pump model delay of 3 minutes the indoor fan is adjusted automatically with In a HEAT operation mode the compressor does not reference to a temperature of the air b
7. ND of IC19 KA78L05 DC5V 0 5V Power Circuit is faulty Load Short Press the ON OFF button Checking the power voltage 1 Is the voltage over AC180V being imposed on terminal 3 and 5 of the fan motor connector CN72 Relay RY71 Coil Disconnection IC05 is faulty 2 Check the voltage of both terminals of terminal block 1 and N 1 after 3 minute operation AC220V Relay RY71 Contact is faulty Press the ON OFF button 1 Is the voltage over AC180V being imposed on 1 FAN Speed High terminal 3 and 5 of the fan motor 2 Continuous Operation connector CN72 Fan Motor of the indoor is faulty 2 The fan motor of the indoor unit doesn t run Fan Motor Connector CN72 is faulty 3 The power voltage between terminal 3 and 5 of the connector CN72 is OV Samsung Electronics ASS Y Main PCB is faulty e Connection is faulty 12 20 Troubleshooting 12 3 4 Outdoor Detailed Inspection Procedure Procedure Inspection Method Wait 30 seconds over after disconnecting the power cable Check the outdoor PCB 1 Is C101 discharged 2 Is the resistance of both terminals of C101 opened 3 Is the fuse of EMI PCB normal 4 Is the reactor wire connected e Over Current Inner short of PCB BLDC FAN Motor Error Check the Outdoor unit PCB 1 Is R701 2000hm 2 Does ry74 operate normally ICO5 amp 16 0V 1 5V 3 Is the fuse F701 normal 4 Is th
8. acitor normal Exchange the PCB Yes Is the resistance for the No detection of DC Link voltage normal Exchange the PCB Yes Is the resistance value of No DC Link discharge normal Exchange the FCB Yes No Is the reactor insulation damaged Exchange the PCB Yes Exchange the reactor Samsung Electronics 12 18 Troubleshooting 12 2 17 When the remote control is not receiving 1 Check if the connector was normally assembled 2 Put the set in operation and check the voltage of No 15 and No 16 of the main PCB CN91 while operating the remote control When the voltage descends below 3V the assembly module PCB is normal and the main PCB is poor Then replace the main PCB 3 Replace the assembly display PCB because the module PCB is poor if the voltage between No 15 16 of CN91 maintains 5V after the remote control starts operation 12 2 18 The others 1 AC Line Zero Cross Signal OUT Check the assembly condition of peripheral part of IC21 ZD21 ZD20 and D200 on the PCB 2 Capacity miss match Check again the indoor unit option code 12 19 Samsung Electronics 12 3 PCB Inspection Method 12 3 1 Pre inspection Notices 1 Check if you pulled out the AC power plug when you eliminate the PCB or front panel 2 Don t hold the PCB side not impose excessive force on it to eliminate the PCB 3 Don t pull the lead wire but hold the whole housing to connect or disconnect a connecto
9. bly of Micom and peripheral circuit part good Yes Check again after assembly of PCB Samsung Electronics Troubleshooting No Reinstall and remove the obstruction No gt Exchange the compressor No o Exchange the PCB No m gt y Exchange the PCB 12 6 Troubleshooting 12 2 6 In case of heating at the cooling mode or cooling at the heating mode 1 Troubleshooting procedure Yes i Is the Thermo off 5 Change the setting temperature of remote control Is the unit EE A ecko Yes Operate it with a heating mode as soon as the defrosting is finished Is the compressor Yes After 3 minutes cooling in 3 minutes off and heating start automatically No Indoor operation SW is on gt Turn the SW On Is the outdoor air sensor and outdoor heat exchanger attached correctly Attach the sensor correctly Is much frost in the heat exchanger Yes Over shortage of the refrigerant y Is the 4 way valve connector connected correctly Does the 4 way valve operate normally No Connect the connecter correctly Check the resistance value NG 4 WAY valve coil error of 4 way valve coil Dose the voltage of AC 220V apply to the connector of 4 way valve coil during the operation Exchange the
10. e Terminate the service Exchange the PCB Restart after power off y No Is the O C Over Current error occurred ooo Yes y 3 No Is the Shunt resistance value normal __ Yes y Is the interphase resistance value No gt of compressor u v vw wu normal Exchange the Compressor Yes Is the compressor body and No interphase resistance insulated Exchange the Compressor Yes Is the condition of No Restart after returning to the normal load Troubleshooting No Is the O C error occurred again aa Terminate the service Correct the sensor position or exchange the sensor F gt indoor outdoor temperature normal load Yes Yes lt y Is the position of temperature sensor No i gt and the sensing value normal Yes Is the connection cable for No gt the compressor and power terminal normal Correct the cable connection Yes Exchange the PCB Samsung Electronics 12 14 Troubleshooting 12 2 13 Communication error 12 15 Troubleshooting procedure Restart after power off Is the communication error occurred again Yes Isn t the power cable and communication cable error Yes Is the connection of communication cable normal
11. e Sub PCB assembled normally e Outdoor PCB Error SUB Relay RY74 Error e IC05 Error Indoor PCB Error Check the LED lighting after power supply Normal Red Light On Green Flickering Yellow Light Off Is the voltage of C101 250V over Is the input of IC19 8V and the output 5V Recheck after disassembling BLDC FAN Wire Inner short of outdoor PCB Wrong assembly of outdoor PCB e BLDC FAN Error Check the condition of indoor amp outdoor connec tion cable Is the green LED light on once per second Is the indoor amp outdoor connection able connected in order Is the grounding wire connected to the both of indoor amp outdoor unit Is the voltage of terminal block N 1 225V Wrong connection of Indoor Outdoor wiring e Wrong assembly of outdoor communication circuit Check the Comp Wire Is it connected red blue and yellow in order in counterclockwise Are the valve and its installation condition good Is the installation condition of outdoor unit Wrong assembly Installation condition is bad 12 21 Check the BLDC Fan 1 Is CNO1 1 3 over 250V 2 Is CNO1 3 5 within 1V 5V 3 Is the voltage of CNO1 6 changed 4 Is the resistance of BLDC Motor 1 3 opened after power off e Outdoor PCB Error BLDC Motor Error Samsung Electronics 12 4 Main Part Inspection Method Part Breakdown Inspection Method Room Temperature Sensor Measure re
12. in a reverse cycle to remove Indoor fan and outdoor fan stop operation intermittently exterior ice in a HEAT mode and indoor fan and outdoor in a HEAT mode fan do not operate intermittently for within 20 of the total heater operation 12 1 Samsung Electronics 12 2 Fault Diagnosis by Symptom 12 2 1 No Power completely dead Initial diagnosis 1 Checklist 1 Is input voltage normal 2 Is AC power linked correctly 3 Is input voltage of DC regulator IC KA7805 IC02 normal 11VDC 12 5VDC 4 Is output voltage of DC regulator IC KA7805 IC02 normal 4 5VDC 5 5VDC 2 Troubleshooting procedure Unplug the power cord and plug it after 30 seconds Press the Power Button on the remote control unit to operate the air conditioner operate Check the display board does not operate Check the indoor unit control board Check whether 2 wires of power cord are connected correctly to the terminal block and control board Reconnect wires correctly Check whether the fuse on the control board is normal FUSE F701 T3 15 A 250 V Replace fuse Check the output of SMPS on the control board Input power AC230 15 V IC02 Input DC12 V IC02 output DC5 V Check the setting temperature PCB should be replaced Samsung Electronics 12 2 Troubleshooting 12 2 2 The Outdoor unit power sup
13. lew operate at a room temperature lower than the setting temperature that indoor fan should operate Fan speed setting is not allowed in DRY mode The speed of the indoor fan is set to LL in DRY mode Fan speed is selected automatically in AUTO mode Compressor stops operation intermittently in DRY mode Compressor operation is controlled automatically in DRY mode depending on the room temperature and humidity Timer LED ORANGE of the indoor unit lights up and the Timer is being activated and the unit is in ready mode air conditioner does not operate The unit operates normally if the timer operation is cancelled The compressor stops intermittently in a COOL mode or The compressor stops intermittently or the fan speed of the DRY mode and fan speed of the indoor unit decreases indoor unit decreases to prevent inside outside air frozen depending on the inside outside air temperature In case of heat pump model When the unit is turned off while de ice is activated the Compressor of the outdoor unit is operating although it is compressor continues operation for up to 9 minutes maximum turned off in a HEAT mode until the deice is completed In case of heat pump model The compressor and indoor fan stop intermittently if room The compressor and indoor fan stop intermittently in HEAT temperature exceeds a setting temperature in order to protect mode the compressor from overheated air in a HEAT mode In case of heat pump model The compressor operates
14. nsor connector connected correctly in accordance with a color Yes Is the temperature sensor connected correctly without separation Yes Reconnect the sensor connector Troubleshooting No Does the both terminal of sensor satisfy the resistance value in accordance with temperature Refer to the R T TABLE Change the position of sensor No Is the resistance value of sensor connection pull_up 24K 600 0 500 0 No gt Exchange the sensor Yes No No Exchange the PCB Yes gt Exchange the PCB Y Temperature Resistance MAX KO 400 0 s CENTER KO MIN kQ 300 0 Resistance kQ 200 0 100 0 0 0 Samsung Electronics Temperature C y Normal operation Exit 12 10 Troubleshooting 12 2 9 Coil temperature sensor error 1 Checklist 1 Is the sensor connector connected correctly 2 Is the sensor placed correctly 3 Does the both terminal of sensor satisfy the resistance value in accordance with temperature 4 Is the resistance value of sensor connection pull_up correct 2 Troubleshooting procedure Is the sensor connector connected
15. ply error i Checklist 1 Are the input power voltage and the power connection correct 2 Is there no Fuse short in the indoor unit and outdoor unit 3 Is the cable connected correctly between the indoor unit and outdoor unit in order 4 Is the wire connected correctly to the terminal block of the indoor unit and outdoor unit 2 Troubleshooting procedure Is the voltage of indoor unit No Is the R701 resistance of No terminal block 1 and 2 correct E indoor PCB 2000 E Exchange the PCB after power input Yes d No Is the indoor unit fuse normal gt Exchange the fuse Pull out the power cord and execute the following step lt after 30 seconds y No Is the outdoor unit normal m Exchange the fuse Yes y A No Is the outdoor unit narmal m Connect the reactor wire Is the reactor connected correctly Yes y No Disassemble the PCB Is the of C102 short m fromthe case Yes Yes Is there no error at the insertion of PCB Yes y Exchange the PCB Exchange the PCB Yes No Are the BLDC FAN Wire Is the of C102 short gt 1 and 3 short Yes Yes Exchange the PCB Exchange the BLDC FAN y gt Normal Operation y Exit 12 3 Samsung Electronics 12 2 3 When the Up Down Louver Motor Does Not Operate
16. r to the PCB 4 In case of outdoor PCB disassembly check first the complete discharge of condenser C103 after 30 seconds power off 12 3 2 Inspection Procedure 1 Check connector connection and peeling of PCB or bronze coating pattern when you think the PCB is broken 2 The PCB is composed of the 3 parts Indoor Main PCB Part MICOM and surrounding circuit relay room fan motor driving circuit and control circuit sensor driving circuit power circuit of DC12V and DCSV and buzzer driving circuit Display part LED lamp Switch Remocon module Outdoor Main PCB part MICOM and surrounding circuit IPM and PFC circuit and control circuit EMI PCB Part Line filter and Noise Capacitor Varistor 12 3 3 Indoor Detailed Inspection Procedure Procedure Inspection Method Plug out and pull the PCB 1 Is the fuse disconnected out of the electronic box Check the PCB fuse Over current Indoor Fan Motor Short e AC Part Pattern Short of the MAIN PCB Supply power Checking the power voltage If the operating lamp twinkles at this time 1 Is the DB71 input voltage AC200V AC240V the above 1 3 have no relation Power Cord is fault Fuse open Wrong Power Cable Wiring AC Part is faulty 2 Is the voltage between both terminals of the C104 on the 2 side of the transformer DC12V 0 5V Switching Trans or Power Circuit is faulty 3 Is the voltage between both terminals of OUT and G
17. rdance with temperature 4 Is the resistance value of sensor connection pull_up correct 2 Troubleshooting procedure Yes Is the sensor connector connected Reconnaer the censor connector correctly in accordance with a color Yes No Is the temperature sensor connected correctly without separation Po Change the position of sensor Yes Does the both terminal of sensor No satisfy the resistance No value in accordance with temperature pe Exchange the sensor Refer to the R T TABLE Yes No Is the resistance value X R o of sensor connection pull_up 18 2K Exchange the PCB 400 0 350 0 Temperature Resistance MAX kQ 300 0 CENTER kQ MIN kQ 250 0 200 0 150 0 Resistance kQ 100 0 50 0 0 0 12 9 mM Nn O DTD O a ON ST NH TFT TF O O mo OOD Ol Temperature C y gt Exchange the PCB Y Normal operation Exit Samsung Electronics 12 2 8 Discharge temperature sensor error 1 Checklist 1 Is the sensor connector connected correctly 2 Is the sensor placed correctly 3 Does the both terminal of sensor satisfy the resistance value in accordance with temperature 4 Is the resistance value of sensor connection pull_up correct 2 Troubleshooting procedure Is the se
18. re matched correctly No Exchange the Fan Yes gt Exchange the PCB __ Normal operation Exit Samsung Electronics 12 12 Troubleshooting 12 2 11 DC Link voltage sensor error 1 Checklist 1 Is the voltage of indoor unit terminal block 1 2 correct after power supply 2 Is the capacitor C101 C102 C103 for DC Link assembled in accordance the specification 3 Are R112 R113 R114 470 Kohm 4 Is R115 14 3Kohm 2 Troubleshooting procedure 12 13 v Is the voltage of indoor unit terminal block Apply the troubleshooting for 1 2 correct after power supply outdoor unit power supply error Yes No lt Is the capacitor C101 C102 C103 No for DC Link assembled in accordance connect ie connect the specification Yes y No Are R113 R114 R115 470kohm c Y Exchange the PCB Yes y No Is R116 14 3kohm gt Exchange the Fan Yes gt Exchange the PCB __ Normal operation Exit Samsung Electronics 12 2 12 O C Over Current error 1 Checklist 1 Is the Shunt resistance value correct 2 Is the condition of surrounding temperature abnormal overload 3 Is there any problem as like the temperature sensor separation or measurement value error 4 Is the interphase resistance of compressor normal 2 Troubleshooting procedur
19. sistance with a tester Normal At the normal temperature 37kQ 8 3kQ 7 C 30 C Refer to Table 12 3 4 Abnormal 0 Open or Short Room Fan Motor Measure the resistance between terminals of the connector CN72 with a tester Normal At the normal temperature 10 C 30 C Compare terminal Resistance Yellow Blue 404 40 10 Yellow Red 3400 10 Abnormal 0 Open or Short Stepping Motor Measure the resistance between the red wire and each terminal wire with a tester Normal About 3000 at the normal temperature 20 C 30 C Abnormal 00 Open or Short Samsung Electronics 12 22
20. t after power off Is the lock error occurred again Terminate the service Is the interphase resistance value of No compressor u lt v vw wu normal Exchange the compressor Yes Is the compressor body and interphase resistance insulated Exchange the compressor Yes Is the connection cable for the No Correct the cable connection compressor and power terminal normal Yes Exchange the PCB 12 17 Samsung Electronics Troubleshooting 12 2 16 DC Link Over voltage Low voltage error 1 Checklist 1 Is the power voltage normal 2 3 4 5 Is the voltage of front and back terminal of indoor outdoor power relay normal Is the resistance value for DC Link voltage detection NORMAL Is the resistance value of DC Link discharge normal Is the appearance of DC Link Capacitor normal ewer a 2 Troubleshooting procedure Restart after power off y Is the DC Link voltage error occurred again No a Terminate the service Yes y Is the power voltage normal No Terminate the service S Yes y i N Is the front and back terminal voltage of o Exchange the PCB indoor outdoor power relay normal Yes Reassembly the PCB Yes Is the appearance of No DC Link Cap
Download Pdf Manuals
Related Search