AirStage AO54FJ, Service Manual

Page: 100 / 169

Trouble shooting 27
OUTDOOR UNIT OUTDOOR UNIT Error Method: Error Method:
CT ERROR
Detective Actuators: Detective Actuators:
Ct abnormal of Power PCB is detected by
Control PCB detection circuit
Detective details: Detective details:
When the compressor speed become more than 50 Hz after the start up,
the compressor stops if Outdoor unit current (Compressor current)
becomes less than 8.0A that was detected by the input current sensor (CT).
If this operation occurs 2 times continuously, the compressor becomes
permanent stop.
Then LED indicates error, and the error information is output to the network.
Forecast of Cause Forecast of Cause: 1. Connection electrical parts 4. Reactor (Coil) is open or short to other circuit
2. Power PCB (CT) defective 5. Check TR PWB ASSY
3. Diode bridge defective
Check Point 1 : Check connection electrical parts Check Point 1 : Check connection electrical parts
Check if any incorrect wiring at connectors of electrical parts
Check the cable wiring between Filter PCB and Control PCB (CN 202-CN11)
Correct the connection mistake or erroneous connection of connector.
Check Point 2 : Check Power PCB (CT) Check Point 2 : Check Power PCB (CT)
Remove connector CN11 and check the resistance at both terminals (560ohm).
If it is not possible to check the resistance value, replace Power PCB
Check Point 3 : Check Diode bridge Check Point 3 : Check Diode bridge
Remove the connector and measure the resistance value at each terminal by following procedure.
Check Diode bridge (PARTS INFORMATION 3) (PARTS INFORMATION 3)
Check Point 4 : Check Reactor (Coil) Check Point 4 : Check Reactor (Coil)
Remove the connector and check if each terminal is open or if there is a short circuit in the electrical box.
Indicate or Display: Indicate or Display:
Indoor Unit : Operation LED Flash Flash , , Timer LED 3 Times Blink 3 Times Blink
Swing LED 3 Times Blink 3 Times Blink
Outdoor Unit : LED1 Flash Flash , , LED4 6 6 Time Blink Time Blink
ERROR CODE: E:32
Check Point 2 : Diagnosis of TW PWB ASSY Check Point 2 : Diagnosis of TW PWB ASSY
1.If error appears during the compressor running, check if each voltage between U – V,V – W, W – U are output in a good valance.
If the voltage value comparison between each terminal is abnormal when the rotation frequency is constant, replace
TW PWB ASSY.
2. Check TR ASSY(Judgment of Transistor module)
Check the continuity by removing each terminal cable.
Replace TR ASSY if it is abnormal.(Compare with the table on right)
06-30
P
U
V
W
N
TR PWB ASSY
(+),( - ) shows the terminal of the meter
Outdoor unit grille side
14 15
N ( )
N ( )
W ( )
V ( )
14 15
U ( )
P ( )
V ( )
U ( )
W ( )
V ( )
U ( )
P ( )
W ( )
V ( )
U ( )
W ( )
Normal
resistance
value
COMP
TERMINAL
P / N
TERMINAL
Multimeter
Resistance value
U
1M Ohm or greater
U
W
V
P
W
V
N
The resistance value is changes in a type
of the tester (Digital or Analogue)
and internal resistance.
Confirm method for analog meter.
Simple confirm method for digital meter.