Trouble shooting 74
Outdoor Unit - No Power
Check Point 3 : Check Electrical Components
OK
OK
NO
Check the voltage of power supply.
>> Check if
AC208- 230V
appears at Outdoor Unit Terminal L1-L2, L2-L3, L3-L1.
AC
Forecast of Cause :
1. Power Supply failure 2. Outside cause 3. Electrical Components defective
Check Point 1 : Check Installation Condition
Isnt the breaker down?
Check loose or removed connection cable.
>>If abnormal condition is found, correct it by referring to
Installation Manual or Design ta & Technical Manual.
Check Point 2 : Check Outside Cause such as Voltage drop or Noise
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.
Check the fuse on the Filter PCB(Main).
OK
Replace the fuse.
Recheck if the power supply terminals section is shorted.
(Note) Always check in the power off state.
NG
NG
Disconnect connecting cable of the Filter PCB(Main) and Main PCB and recheck.
if the power supply terminals section is not shorted.
(Note) Always check in the power off state.
OK
NG
Replace the Filter PCB
Replace the defective device
OK
OK
NG
Check short circuit on EEV's internal circuit
Disconnect EEV from Main PCB, and check the short circuit of EEV internal circuit.
Check Short circuit ( 0 Ohm) between pin No.1 and other pin No..
OK
Replace the Pressure sensor
Disconnect the connector for the AC power input
devices and check short circuit on power input cable
one by one.
- Solenoid valve, 4 way valve, Heater, Mg-Relay -
Check DC (5.0V) circuit on CN118
Check DC voltage 5.0 V between pin No.1 and pin No.3
Check Pressure Sensor open / short after remove
Transmission PCB from the Main PCB
Replace the defective device
NG
DC
OK
OK
Replace Main PCB
NG (No DC5.0V)
OK (No Short Circuit 0 Ohm)
NG ( Open Circuit )
04-83
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: ......