technical & service manual split system air conditioner

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10. CHECKING ELECTRICAL COMPONENTS 10-1.Measurement of Insulation Resistance ● The insulation is in good condition if the resistance exceeds 2MΩ. 10-1-1. Power Supply Wires Clamp the grounding terminal of the power plug with a lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power terminals. (Fig. 1) Then, also measure the resistance between the grounding and other power terminals. (Fig. 1) 10-1-2. Indoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate. (Fig. 2) Note that the ground line terminal should be skipped for the check. 10-1-3. Outdoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate. (Fig. 2) 10-1-4. Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the desired electric part from terminal plate, capacitor, etc. Similarly disconnect the connector. Then measure the insulation resistance. (Fiqs. 3 and 4) NOTE Refer to Electric Wiring Diagram. If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin. 45 Probe Copper tube or metallic part Copper tube or metallic part Metallic part Clip Clip Clip Clip Probe Ground wire Insulation tester Terminal plate Insulation tester From fan motor, compressor and other parts Insulation tester Insulation tester Probe Probe Fig. 1 Fig. 2 Fig. 3 Fig. 4
10-2.Checking Continuity of Fuse on PCB Ass'y ● Remove the PCB Ass’y from the electrical component box. Then pull out the fuse from the PCB Ass’y. (Fig. 5) ● Check for continuity using a multimeter as shown in Fig. 6. 10-3.Checking Motor Capacitor Remove the lead wires from the capacitor terminals, and then place a probe on the capacitor terminals as shown in Fig. 7. Observe the deflection of the pointer, setting the resistance measuring range of the multimeter to the maximum value. The capacitor is “good” if the pointer bounces to a great extent and then gradually returns to its original position. The range of deflection and deflection time differ according to the capacity of the capacitor. 46 Compressor motor capacitor *1 NOTE Fuse PCB Ass’y Fan motor capacitor Fuse Multimeter *1 Compressor motor capacitor is provided only for 1-phase model. Fig. 5 Fig. 6 Fig. 7
Page 1 and 2: TECHNICAL & SERVICE MANUAL AWR222CL
Page 3 and 4: Table of Contents Page 1. OPERATING
Page 5 and 6: 2. SPECIFICATIONS 2-1. Unit Specifi
Page 7 and 8: 2-1. Major Component Specifications
Page 9: Outdoor Unit AER222SC3 Power source
Page 12 and 13: Outdoor Unit AER222SC AER222SC3 560
Page 14 and 15: 5. PERFORMANCE DATA 5-1. Performanc
Page 16 and 17: 5-2. Air Throw Distance Chart Indoo
Page 18 and 19: Indoor Unit AWR222CLE Outdoor Unit
Page 20 and 21: 6-2. Electric Wiring Diagrams Indoo
Page 22 and 23: Outdoor Unit AER222SC3 19 WARNING T
Page 24 and 25: 7-2. Freeze Prevention ● This fun
Page 26 and 27: 8. TROUBLESHOOTING 8-1. Check befor
Page 28 and 29: B. Circuit breaker trips in several
Page 30 and 31: D. Check transformer in indoor unit
Page 32 and 33: C. Check negative phase relay. (Onl
Page 34 and 35: 8-3-3. Only compressor does not run
Page 36 and 37: 8-5. If a sensor is defective. 8-5-
Page 38 and 39: 9-3. Tools specifically for R407C
Page 40 and 41: (5) Recharging • Be sure to charg
Page 42 and 43: (6) Recharging • Be sure to charg
Page 46: FILIBERTI S.p.A. ��

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