AirStage AO54FJ, Service Manual

Page: 77 / 169

Trouble shooting 2
INDOOR UNIT INDOOR UNIT Error Method: Error Method:
SERIAL SIGNAL ABNORMAL
Indicate or Display: Indicate or Display:
Indoor Unit : Operation LED Flash Flash , , Timer LED 5 5 Times Blink Times Blink
Swing LED 1 1 Times Blink Times Blink
Outdoor Unit : LED1 Flash, LED6
1 8TIMES Blink (Indoor Unit address)
ERROR CODE : E:1F
Detective Actuators: Detective Actuators:
Circuitry in indoor unit Control PCB
Detective details: Detective details:
When the control information from the indoor unit that is recognized by
outdoor unit could not be received more than 20 seconds, LED indicates
abnormal condition.
Forecast of Cause Forecast of Cause : If only certain indoor unit shows abnormal indication. If all system shows abnormal indication.
1) Connection Cable 1) Connection Cable
2) Check signal PCB 2) Check signal PCB
3) Check Electrical Component of Indoor Unit 3) Check Outdoor unit
4) Check Power Supply 4) Check Power Supply
Check Point 1 : Check Connection cable Check Point 1 : Check Connection cable
Check if the restarts by turning ON the power again.
Check connection cable
1) Check Loose screw / Removed Cable on Terminal
2) Check the connection of terminal connection of
L, N, 3 to Control PCB
Check Point 2 : Check Signal PCB Check Point 2 : Check Signal PCB
Check connection (connector) of Signal PCB to
terminal connection.
Check FUSE F201 Signal PCB
If fuse F201 is open, check any incorrect wiring of
connection cable,and replace the FUSE.
If only certain indoor unit shows abnormal indication .
Check Point 1 : Check Connection cable Check Point 1 : Check Connection cable
Check if the restarts by turning ON the power again.
Check connection cable
1) Check Loose screw / Removed Cable on Terminal
2) Check the connection of terminal connection of
L, N, 3 to Control PCB
If all system shows abnormal indication.
Check Point 3 : Check Outdoor unit Check Point 3 : Check Outdoor unit
Refer to Trouble shooting 30
NETWORK COMMUNICATION ABNORMAL
Check Point 3 : Check Point 3 :
Check Indoor unit electrical parts Check Indoor unit electrical parts
Check all connector’s connection, removal, incorrect
wiring.
Check if any shorted mark or corrosion on PCB
If detective portion is uncertain, replace Control
PCB, set up the original address and Check the operation.
Check Point 4 : Check Power supply Check Point 4 : Check Power supply
Check external cause (Power supply)
Instant Drop Check if there is an electric equipment with a large load in the same circuit.
Instant Power Outage Check if there is a defective contact or leakage in the power supply.
Noise Check if there is any equipment that cause the harmonic wave near the power line.
(Neon tube or Electric equipment that harmonic wave Check that the grounding is completely insulated.)
Check Point 2 : Check Signal PCB Check Point 2 : Check Signal PCB
Check connection (connector) of Signal PCB to
terminal connection.
Check FUSE F201 Signal PCB
If fuse F201 is open, check any incorrect wiring of
connection cable,and replace the FUSE.
06-07