Table of Contents
Advertisement
12
TROUBLESHOOTING
12-1. Cautions on troubleshooting
1. Before troubleshooting, check the following:
1) Check the power supply voltage.
2) Check the indoor/outdoor connecting wire for mis-wiring.
2. Take care the following during servicing.
1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the unit, and then after con-
firming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.
2) Be sure to unplug the power cord before removing the front panel, the cabinet, the top panel, and the electronic con-
trol P.C. board.
3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
3. Troubleshooting procedure
1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.
To make sure, check how many times the abnormality indication is flashing on and off before starting service work.
2) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the
components for bursting and discoloration.
3) When troubleshooting, refer to the flow chart on page 123, 124 and the check table on page 125~127.
12-2. Instruction of troubleshooting
• Check the indoor unit with referring to the indoor unit service manual, and confirm that there is any problem in the indoor unit.
Then, check the outdoor unit with referring to this page.
Operation start
Check the outdoor unit
LED indicator
OFF
A Check of power supply
on page 29.
• Indoor unit
• Cool or HEAT
serial signal
opereation only
C Check of
error
B Check of
R.V.coil
serial signa
on page 30.
on page 29.
Housing point
Lead wiring
"00"
• When cooling, heat
exchanger of
non-operating indoor
unit frosts.
•When heating, non
operating indoor unit
gets warm.
D Check of LEV
on page 31.
Display other than "00"
• When cooling,
• When heating,
dew drops in the
room doed not get
non-operating
warm.
E Check of
indoor unit
Check of mis-
inverter,compressor
piping.
on page 31.
Check mis-piping
Shortage of capacity
25
Refer to indicator list
on page 26, 27.
• When cooling,
room does not
cool.
E Check of
inverter,
compressor
on page 31.
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
