Trouble shooting 75
RB Unit - No Power
Forecast of Cause :
1. Power Supply failure 2. Outside cause 3. Electrical Component defective
Is not the breaker down?
Check Point 1 : Power supply
Instant drop ----- Check if there is a large load electric apparatus in the same circuit.
Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.
Noise ----- Check if there is any equipment causing harmonic wave near electric line (Neon bulb or electric equipment that may
cause harmonic wave).
Check the complete insulation of grounding.
OK
Is not open circuit ?
If the fuse was open state, check the cause of short circuit
on the AC circuit before replacing the spare parts.
Check Point 2 : Fuse on the PCB
NG (Short circuit on AC circuit)
Disconnect AC Power input wires (W101,W102) and Check
short circuit
Check Point 3 : Short circuit check on AC circuit
NG (Short circuit on AC circuit)
Replace Main PCB
Check
Short circuit between Pin No.1 and Pin No.2 of SV coil
Check Point 4 : Short circuit on SV coil
Disconnect transmission PCB and check DC 5.0V on C1
Check Point 5-2 : Short circuit check on DC circuit
NG (Short circuit between Earth)
OK
OK
Replace Transmission PCB
Check the DC (5.0V) on C1
Check Point 5-1 : Short circuit check on DC circuit
NG (No voltage)
OK (DC 5.0V )
Replace SV Coil with Connector
NG (No Voltage DC 5.0V )
Replace Main PCB
04-84
Summary of Contents for Airstage UTP-RU01AH
Page 1: ...SERVICE MANUAL 208 230V 60Hz ...
Page 5: ...1 TEST RUN ...
Page 6: ......
Page 34: ...2 OUTDOOR UNIT OPERATION CONTROL ...
Page 59: ...3 INDOOR UNIT OPERATION ...
Page 60: ......
Page 82: ......
Page 83: ...4 TROUBLE SHOOTING ...
Page 84: ......
Page 186: ...04 96 0 24 AOUA120 208 230 AOUA72 90 0 19 RED WHITE BLACK U V W ...
Page 208: ...5 APPENDING DATA UNIT ...
Page 209: ......
Page 215: ...CASSETTE TYPE MODELS AUUB18TLAV AUUB24TLAV AUUB30TLAV AUUB36TLAV 05 06 ...
Page 217: ...MEDIUM STATIC PRESSURE DUCT TYPE MODEL ARUM24TLAV 05 08 MODEL ARUM30TLAV ARUM36TLAV ...
Page 218: ...HIGH STATIC PRESSURE DUCT TYPE MODELS ARUH36TLAV ARUH48TLAV ARUH60TLAV 05 09 ...
Page 219: ...FLOOR CEILING TYPE MODELS ABUA12TLAV ABUA14TLAV ABUA18TLAV ABUA24TLAV 05 10 ...
Page 220: ...CEILING TYPE MODELS ABUA30TLAV ABUA36TLAV INDOOR UNITS INDOOR UNITS 05 11 ...
Page 221: ...WALL MOUNTED TYPE MODELS ASUA7TLAV ASUA9TLAV ASUA12TLAV ASUA14TLAV 05 12 ...
Page 222: ...MODELS ASUB18TLAV ASUB24TLAV 05 13 ...
Page 224: ...MODEL UTP RU01AH MODEL UTP RU01BH 5 2 3 RB Unit 05 15 ...
Page 225: ...MODEL UTP RU01CH 05 16 ...
Page 226: ...MODEL UTP RU04BH 05 17 ...
Page 227: ...MODELS AAUA48TLAV 5 2 4 Outdoor Air Unit 05 18 MODELS AAUA72TLAV ...
Page 228: ...MODELS AAUA96TLAV 05 19 ...
Page 230: ...6 DISASSEMBLY PROCESS ...
Page 245: ......