Ballu KFR-28GW/BP Series, Service Manual

Page: 40 / 70

5.REFRIGERANT SYSTEM DIAGRAM 6.PERFORMANCE CURVES 5.REFRIGERANT SYSTEM DIAGRAM 9.SERVICE FLOW CHART
39
Switch on the
power supply
No
Yes
No
Yes
Check the result
Replace the power
board
No
Yes
Display board
trouble
Yes
No
Indoor control
board Is broken
and replace it
Reconnect all
the wires or
replace it
Yes
No
Start up self-diagnosis
function
Remote controller
trouble or replace the
battery
No
Yes
Display board trouble
Yes
No
Indoor control board
trouble
No
Is the fuse
blown?
No
Yes
Check and find short circuit or open circuit among
other components such as transformer or fan motor?
Yes
No
Indoor control board trouble
Does LED screen
display
Normally?
Is the wires
poorly
connected?
Check the transformer,Is
resistance of winding
Does it receive
the signal of
remote controller?
Is remote
controller in good
condition ?
After replacing
the display
board,Is there
still trouble?
After replacing
the indoor
board,Is there
still trouble?
Is indoor
control board
short circuit?
After replacing
the display
board,Is there
still trouble?
Running light flickers(*1)
Indoor temperature sensor
trouble
Replace the
temperature sensor
Yes
Replace the indoor
control board
Standby light flickers(*2)
Indoor coil sensor trouble
Replace the indoor
coil sensor
Replace the indoor
control board
No
Yes
Is the resistence
of sensor Normal?
Is the
resistence of
sensor correct?
Yes
When the air conditioner works in the abnormal condition,please press
the sensor button of the remote controller one time and then press
this button continuously two time, the trouble (the LED indicator
flickers or lights up) will be displayed on the display panel.
0(short circuit) or
(open circuit)
8