Friedrich MM18YJ, Service Manual

Page: 54 / 83

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Start
If the resistance
value is 0
Remove PFC capacity
and test resistance of
two terminals
Capacity is
short
circuit and
replace it
Y
Re-energize
the unit and
start it
Cut the terminal of reactor,
test the resistance
between two terminals of
reactor with ohmic meter
Replace the
reactor
Re-
energize
the unit and
start it
Check the
connection wire
of reactor (L) of
outdoor unit and
PFC capacity
If there is damaged
short circuit
Replace
connection
wire with circuit
diagram
Replace
control board
AP1
Y
N
N
Y
N
N
N
N
If there is damaged
short circuit
If the malfunction is
removed?
If the malfunction is
removed?
If the malfunction is
removed?
Y
Y
Y
End