Ballu KFR-28GW/BP Series, Service Manual

Page: 42 / 70

5.REFRIGERANT SYSTEM DIAGRAM 9.SERVICE FLOW CHART
41
Timer and running
indicator flicker(*5)
Communication trouble
No
Connect the indoor
and outdoor unit
again according to
the wiring diagram
Yes
Yes
Replace the outdoor
control board and
start up again
Ourdoor control
board trouble
Yes
No
Indoor control
board trouble and
replace it
No
Yes
Rectifier trouble
and replace it
No
No
No
Yes
No
No
No
No
Yes
Replace the outdoor
control board
Yes
Replace the electrotic
capacitor
No
Is the input of bridge of
rectifier AC 220V?
Yes Replace the PTC
Yes
Ourdoor control board
trouble and replace it
Is the terminal P
and N of IPM board
short circuit?
Replace the outdoor
control board or
wave filter board?
Is the electrotic
capacitor short
circuit?
Is the DC310V input
of outdoor control
board short circuit?
Does the
rectifier have
the alternating
current input?
Is the PTC hot?
Does the power
indicator of
outdoor control
board light up?
Are all the lead
wires connected
between indoor and
outdoor unit?
Is the system
in good
condition?
Is the voltage of
large electrolytic
capacitor DC 310V?
Is the PTC
short circuit?
No
Replace the bridge
rectifier
Yes
Wave filter board
trouble and replace it
Is wave filter
board open
circuit?
No
No
Check the votage
of power source
Replace the IPM board