AIR CONDITIONER - Heronhill Air Conditioning Ltd
AIR CONDITIONER - Heronhill Air Conditioning Ltd AIR CONDITIONER - Heronhill Air Conditioning Ltd
7-6. Defrost Operation *Heat pump model onlyDuring the heating operation, the outdoor heatexchanger temperature goes down and sometimes it isfrozen.In this case, the air conditioner stops the heatingoperation and starts the defrost operation to melt ice.7-6-1. Condition to start the defrost operationThe defrost operation starts whichever belowconditions are satisfied.(1) When the cumulative compressor operating time islonger than 40 or 90 minutes and differencebetween the indoor heat exchanger temperatureand the room temperature is less than thespecified value. (This value is decided by themicroprocessor.) (Control example is shown inFig. 7-6-1. In case of B or C, the defrost operationstarts.)(2) When the current limit control or the hightemperature limit control is performed for total of90 minutes.Indoor heat exchanger temp- Room tempADBCCumulativecompressoroperating timeDEFROST LAMP :FILE NO. SVM-05020(1) The heating operation is performed for at least 90minutes.(2) The defrost operating time is 10 minutes.7-6-3. Ending condition at defrost operation(1) When the compressor current becomes 7.5A ormore during defrost operation, the defrostoperation stops and the heating operation restarts.(The current sensor detects the compressorcurrent.)(2) The defrost operation continues for at most6 minutes or 10 minutes.· During defrost operation, the PRE-DEF. lamp ison and the indoor and outdoor fans are off.· The compressor start protection timer is interlookedwith the PRE-DEF. lamp. So the PRE-DEF.Lamp is off (the fans stop) for about 3 minutesafter the [ ] button is turned on. Whenthe compressor is turned on, the PRE-DEF. lampcomes on. After the heat ex-changer is preheatedto about 24 °C or higher, the PRE-DEF. Lampgoes off, and the indoor fan starts.Fig. 7-6-1 (Indoor fan speed : M)7-6-2. Defrost operation time control(1) The heating operation is performed for at least40 minutes.(2) The maximum defrost operating time is 6 minutes.The defrost operating time for the 4th cycle is10 minutes. (When the outdoor temperature isvery low, however, the defrost operating time is10 minutes.)minutes40minutes40minutes40minutes40HeatingDefrostHeatingDefrostHeatingDefrostHeatingDefrostMax 6 minutes10 minutes1 cycleFig. 7-6-2- 31 -
7-7. Current Limit Control *Heat pump modelonlyThe microcontroller detects the input current so as toprevent it exceeds a specified value by means ofcontrolling the outdoor fan control as described in (1)and (2).FILE NO. SVM-05020(1) Current limit control (Cooling operation)Control is performed as shown below by detectingthe compressor operating current with a currentsensor (C.T).Input current13UKH Series / 10UKH Series13.5A / 19.2A I412.5A / 17.8A I3CompressorOutdoor fanMore than I4 continues for 3 secondsOFFMore than I3 continues for 5 secondsOFFONFig. 7-7-1(2) Current limit control (Heating operation)Control is performed as shown in Fig. 7-7-2Input current13UKH Series / 10UKH Series13.5A / 19.2A I412.5A / 17.8A I3CompressorOutdoor fanMore than I4 continues for 3 secondsOFFMore than I3 continues for 5 secondsOFF10A / 15.6AI2ONOFF9A / 15.0AI1ONFig. 7-7-2Remark :1. This function is available only for heat pump model (Cooling models have no a current sensor (C.T.)).2. For 10UKH Series, the value of currents shown on the diagram above are two times the actualoperating value. This is because the lead wire operated two times through the C.T.- 32 -
- 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: 7-3. Hi POWER Mode([Hi POWER] butto
- 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 and 54: FILE NO. SVM-050202. Set the remote
- Page 55 and 56: 9-3. Primary Judgement9-3-1. Role o
- 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
7-7. Current Limit Control *Heat pump modelonlyThe microcontroller detects the input current so as toprevent it exceeds a specified value by means ofcontrolling the outdoor fan control as described in (1)and (2).FILE NO. SVM-05020(1) Current limit control (Cooling operation)Control is performed as shown below by detectingthe compressor operating current with a currentsensor (C.T).Input current13UKH Series / 10UKH Series13.5A / 19.2A I412.5A / 17.8A I3CompressorOutdoor fanMore than I4 continues for 3 secondsOFFMore than I3 continues for 5 secondsOFFONFig. 7-7-1(2) Current limit control (Heating operation)Control is performed as shown in Fig. 7-7-2Input current13UKH Series / 10UKH Series13.5A / 19.2A I412.5A / 17.8A I3CompressorOutdoor fanMore than I4 continues for 3 secondsOFFMore than I3 continues for 5 secondsOFF10A / 15.6AI2ONOFF9A / 15.0AI1ONFig. 7-7-2Remark :1. This function is available only for heat pump model (Cooling models have no a current sensor (C.T.)).2. For 10UKH Series, the value of currents shown on the diagram above are two times the actualoperating value. This is because the lead wire operated two times through the C.T.- 32 -
Change language