AIR CONDITIONER - Heronhill Air Conditioning Ltd

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9. TROUBLESHOOTING CHARTFILE NO. SVM-050209-1. Troubleshooting ProcedureFollow the details of 9-2. Basic Check Items.If there is no trouble corresponding to 9-2, checkwhether or not there are faulty parts following9-4. Self-Diagnosis by Remote Control.9-2. Basic Check Items9-2-1. Power supply voltageThe line voltage must be AC 220 − 240V. If it is notwithin this range, the air conditioner may not operatenormally.9-2-2. Incorrect cable connection between Indoorand outdoor unitsThe indoor unit is connected to the outdoor unit with5 cables (Heat pump model) or 3 cables (Cooling Onlymodel). Check that the indoor and outdoor units havebeen properly connected with terminals assigned thesame numbers. If the connectors are not properlyconnected, the outdoor unit will not operate normally,or OPERATION lamp and TIMER lamp will blink (5Hz).9-2-3. Program controlThe microcontroller operates as shown in Table 9-2-1to control the air conditioner. If there are any operationalproblems, check whether or not the problemscorrespond to Table 9-2-1. If they correspond to theTable, they are not problems with the air conditioner,but they are indispensable operations to control andmaintain the air conditioner properly.1 When the main power supply is turned on,the OPERATION lamp on the indoor unitblinks.2 The indoor fan motor speed does not changein the Dry operation.3 The compressor is not turned off even thoughthe room temperature is in the range that thecompressor is turned off.4 The compressor is not turned on and off eventhough the thermo control is operated in theDry operation.5 The PRE-DEF. lamp is indicated when theHeating operation starts.6 The outdoor fan motor stops in the Heatingoperation.7 The compressor is not turned on even thoughthe room temperature is in the range that thecompressor is turned on.8 The operation mode changes in theAutomatic operation.9 The Fan only operation continues in theAutomatic operation.10 The Hi-POWER operation does not work.Table 9-2-1No. Operation of air conditioner DescriptionsThe OPERATION lamp blinks to indicate that power is turned on.If the [ ] button is pressed, the lamp stops blinking.The indoor fan motor speed is automatically controlled in the Dryoperation.The compressor has a function that it is not turned off for3 minutes after it is turned on even though the room temperatureis in the range that the compressor is turned off.In the Dry operation, the compressor is turned on and offautomatically at the regular intervals, independent of the thermocontrol.The PRE-DEF. lamp is indicated during the Defrostingoperation or if the indoor heat exchanger temperature is low whenthe Heating operation starts. At this time, the indoor fan motorstops to prevent cold air from blowing in the room.When the indoor heat exchanger temperature is high, the outdoorfan motor is stopped by the high-temperature limit controloperation.The compressor is not turned on in the restart delay timer(3-minutes timer) operation. It is also not turned on after the powersupply is turned on because of this timer operation.In Automatic operation, the room temperature is detected all timefor control fan speed and the operation mode is changed every15 minutes according to difference between the room temperatureand the preset temperature.When the room temperature is in the range (Preset temperature± 1°C), the Fan only operation is selected.This operation does not work when the unit is in the Dry operationor Fan only operation.− 53 −
9-3. Primary Judgement9-3-1. Role of indoor unit controllerThe indoor unit controller receives the operationcommands from the remote control and executesthem.•Temperature measurement at the air outlet of theindoor heat exchanger by the indoor temperaturesensor•Temperature setting of the indoor heat exchanger bythe heat exchanger sensor•Louver motor control•Indoor fan motor operation control•LED display control•Transferring of operation commands to the outdoorunit9-3-2. Failure diagnosisFILE NO. SVM-05020The indoor unit diagnoses the operation condition andindicates the information of the self-diagnosis with thelamps on the display panel of the indoor unit.Table 9-3-1ABCDEFGLampsOPERATION lamp is blinking. (1Hz)OPERATION lamp is blinking. (5Hz)OPERATION lamp is blinking. (5Hz)OPERATION lamp is blinking. (5Hz)OPERATION lamp is blinking. (5Hz)OPERATION and TIMER lamps are blinking.(5Hz)OPERATION, TIMER and PRE-DEF.(or FAN ONLY for cooling only model) lampsare blinking.Self-diagnosisPower failure (when the power supply is turning on)Thermo sensor (TA) short or breakHeat exchanger sensor (TC) short or breakIndoor fan motor lock or failureIndoor P.C. board failureWrong wiring of connecting cableCycle failure•Gas shortage or other refrigerant cycle trouble•Heat exchanger sensor open, break or short•Overload relay or thermostat trouble of compressorThe remote controldoes not work.The outdoor fandoes not rotate.Table 9-3-2 Diagnosis by detective operationSymptom Check Primary judgementTurn off the power supply once,then turn it on. Try to operatethe remote control.The compressor operates.The compressor does not operate.The remote controlstill does not work.The remote controlworks.The indoor unit (and/or remotecontrol) is/are defective.OK.The outdoor unit (Outdoor fanmotor) is defective.An internal part of thecompressor or PCB is defective.− 54 −
Page 1 and 2:
FILE NO. SVM-05020SERVICE MANUALAIR
Page 3 and 4: 8. INSTALLATION PROCEDURE8-1 Safety
Page 5 and 6: FILE NO. SVM-05020MODEL RAS-10UKHP-
Page 7 and 8: FILE NO. SVM-05020Note : 1• Capac
Page 9 and 10: 2. CONSTRUCTION VIEWSFILE NO. SVM-0
Page 11 and 12: FILE NO. SVM-050203-2. RAS-10UKHP-E
Page 13 and 14: 3-4. RAS-10UKP-ES4 / RAS-10UA-ES4FI
Page 15 and 16: 3. WIRING DIAGRAMFILE NO. SVM-05020
Page 17 and 18: FILE NO. SVM-050204-3. Outdoor Unit
Page 19 and 20: FILE NO. SVM-050204-7. Outdoor Unit
Page 21 and 22: 5-2. RAS-10UKHP-ES4 / RAS-10UAH-ES4
Page 23 and 24: FILE NO. SVM-050205-4. RAS-10UKP-ES
Page 25 and 26: 6. CONTROL BLOCK DIAGRAMFILE NO. SV
Page 27 and 28: 7. OPERATION DESCRIPTIONFILE NO. SV
Page 29 and 30: 7-2-3. Dry operation([MODE] button
Page 31 and 32: 7-3. Hi POWER Mode([Hi POWER] butto
Page 33 and 34: 7-7. Current Limit Control *Heat pu
Page 35 and 36: 7-8-2. How to cancel auto restart f
Page 37 and 38: FILE NO. SVM-050207-11. QUIET ModeQ
Page 39 and 40: DANGER− 38 −FILE NO. SVM-05020
Page 41 and 42: 8-3. Installation8-3-1. Optional in
Page 43 and 44: 8-3-3. Installation/Servicing tools
Page 45 and 46: FILE NO. SVM-050201. Securely fit t
Page 47 and 48: FILE NO. SVM-050208-4-4. Piping and
Page 49 and 50: FILE NO. SVM-050208-4-6. Drainage1.
Page 51 and 52: 8-5-3. EvacuatingAfter the piping h
Page 53: FILE NO. SVM-050202. Set the remote
Page 57 and 58: Table 9-4-1FILE NO. SVM-05020Checkc
Page 59 and 60: FILE NO. SVM-05020Cooling ModelOper
Page 61 and 62: FILE NO. SVM-05020RAS-13UKP-ES4, RA
Page 63 and 64: 9-5-5. Only outdoor fan does not op
Page 65 and 66: FILE NO. SVM-050209-5-7. Only the i
Page 67 and 68: 9-6. Troubleshooting for Remote Con
Page 69 and 70: (3) Checking procedureHeat Pump Mod
Page 71 and 72: Table 9-6-3 Approximate resistance
Page 73 and 74: FILE NO. SVM-05020No. Part name Pro
Page 75 and 76: FILE NO. SVM-05020No. Part name Pro
Page 77 and 78: FILE NO. SVM-0502011. EXPLODED VIEW
Page 79 and 80: FILE NO. SVM-0502011-4. Outdoor Uni
Page 81 and 82: 11-6. Outdoor Unit (RAS-13UA-ES4)FI
Page 83 and 84: FILE NO. SVM-0502011-8. Outdoor Uni
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AIR CONDITIONER - Heronhill Air Conditioning Ltd

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