Ballu KFR-28GW/BP Series, Service Manual

Page: 41 / 70

5.REFRIGERANT SYSTEM DIAGRAM 9.SERVICE FLOW CHART
40
No
Indoor coil
sensor trouble
Yes
Wash the air filter
Yes
No
Indoor coil
sensor trouble
Yes
No
Communication trouble
between Indoor unit and
outdoor unit,replace the
outdoor control board
Fan motor or
indoor control
board trouble
Yes
Yes
Is indoor heat
exchanger freezed
Is the indoor
fan speed too
low?
Is indoor heat
exchanger very hot?
Is there too
much dirt on
air filter?
Running and standby light
flicker(*3)
Indoor heat exchanger Is
freezed
Running light flickers(*4)
indoor heat exchanger Is
over load
Wash the air filter
Yes
No
Communication trouble
between Indoor unit and
outdoor unit,replace the
outdoor control board
Fan motor or
indoor control
board trouble
Yes
Yes
Is the indoor
fan speed too
low?
Is there too
much dirt on
air filter?
Timer indicator lights up(#4)
Outdoor narrow tube
temperature sensor A trouble
Replace the
temperature sensor
Yes
Replace the outdoor
control board
Running and timer indicator
light up(#5)
Outdoor narrow tube
temperature sensor B trouble
Replace the
temperaure sensor
Replace the outdoor
control board
No
Yes
Is the resistence
of sensor Normal?
Is the
resistence of
sensor correct?
No
Standby,timer and high power
indicator light up(#14)
Outdoor return tube
temperature sensor trouble
Replace the
temperaure sensor
Replace the outdoor
control board
No
Yes
Is the
resistence of
sensor correct?