AIR CONDITIONER - Heronhill Air Conditioning Ltd

(3) Checking procedureHeat Pump ModelTable 9-6-1FILE NO. SVM-05020No.ProcedureCheck Point (Symptom)Causes1Shut off the power supply andremove the P.C. board assemblyfrom the electronic parts base.Remove the connecting cable fromthe terminal block.1. Is the fuse blown?1.•Application of shock voltage.•Overload by short-circuit of theparts.2Remove the connector for the motor,and turn the power on.If the OPERATION lamp blinks(0.5 sec. : ON, 0.5 sec. : OFF) whenthe power turning on, the checkingpoints described as 1-4 of rightcolumn are not necessary toperform.Voltage check1.Between TP1 and N(AC 220∼240V)2.Between + and − of C63(DC 310 ~ 340V)3. Between 12V and GND4. Between 5V and GND1.•AC power cord is defective.•Poor contact of the terminal plate.•Miss wiring of the power relay.2.•Capacitor (C01, C02) is defective.•Line filter (L01) is defective.•Resistor (R319) is defective.•Diode (DB01) is defective.3. M01, DB01, R319, C63 aredefective.4.IC04 are defective.3Make the operation status bypushing once the [ ]button, except the status of [FANONLY], [ON TIMER].Voltage check1. Voltage of relay coil. (DC 12V)Between pin 2 of RY01 and GND2.Between No. 1 and 2 of connectingcable terminal block.(AC 220∼240V)1. defective relay driver. (Q16)2. Poor contact of relay.4Start the operation with the systemwhich the time of the restart delaytimer is shortened.1. All indicators light for 3 sec..2. Indicators do not indicate normallyafter approximate 3 sec..}Defective indicator, or poorhousing assembly. (CN14)5Make the operation status bypressing once the [ ]button.1.The time of the restart delay timeris shortened.2.Cool operation3.Air volume [AUTO]4. Make the setting temperature lowerenough than room temperature.5. Continuous operation.1. Compressor does not operate.2. OPERATION lamp blinks.1.The temperature of the indoorheat exchanger is abnomally lower.2.Poor contact of the heatexchanger sensor. (The connectoris disconnected.) (CN01)3.Heat exchanger sensor, main P.C.board are defective. (Refer toTable 9-6-2 for the judgment ofdefective resistance values.)4.Main P.C. board is defective.6The status of No. 5 is continued, andmake the following condition.1.Heat operation2.Make the setting temperaturehigher enough than roomtemperature.1. Compressor does not operate.2. OPERATION lamp blinks.1. The temperature of the heatexchanger is abnormally high.2. The heat exchanger sensorconnector has short-circuit. (CN01)3. The heat exchanger sensor isdefective. (Refer to Table 9-6-2for the judgment of defectiveresistance values.)4. P.C. board is defective.7Turn the power on after connectingthe motor connector. Start theoperation with the followingcondition.1.Operation [Cooling]2.Airflow [High fan]3.Continuous operation1.Motor does not rotate. (The keyoperation is accepted.)2. The Motor rotates, but it vibratestoo much.1. Poor contact of the motorconnector.2. P.C. board is defective.− 68 −