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10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
(Note 1) Refer to indoor unit section for code P and code E.
Error Code
Abnormal point and detection method
Case
Judgment and action
None
—
No voltage is supplied to terminal
block(TB1) of outdoor unit.
a) Power supply breaker is
turned off.
b) Contact failure or disconnec-
tion of power supply
terminal
c) Open phase (L2 or N phase)
Electric power is not supplied to
outdoor controller circuit board.
a) Disconnection of connector
(CNDC)
Disconnection of reactor
(ACL4)
Disconnection of outdoor noise
filter circuit board or parts fail-
ure in outdoor noise filter circuit
board
Defective outdoor controller
circuit board
Check following items.
a) Power supply breaker
b), c) Connection of power supply terminal
block(TB1)
Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector CNDC on
the outdoor noise filter circuit board.
Refer to 10-9.
Check connection of reactor. (ACL4)
a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 10-9.
Replace controller board (When items above
are checked but the units cannot be repaired).
F5
(5201)
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously after power sup-
ply.
63H: High-pressure switch
Disconnection or contact failure
of 63H connector on outdoor
controller circuit board
Disconnection or contact failure
of 63H
63H is working due to defective
parts.
Defective outdoor controller
circuit board
Check connection of 63H connector on
outdoor controller circuit board.
Refer to 10-9.
Check the 63H side of connecting wire.
Check continuity by tester.
Replace the parts if the parts are defective.
Replace outdoor controller circuit board.
F3
(5202)
63L connector open
Abnormal if 63L connector circuit is open
for 3 minutes continuously after power sup-
ply.
63L: Low-pressure switch
<RP250 only>
Disconnection or contact failure
of 63L connector on outdoor
controller circuit board.
Disconnection or contact failure
of 63L.
63L is working due to refriger-
ant leakage or defective parts.
Defective outdoor controller
circuit board.
Check connection of 63L connector on
outdoor controller circuit board.
Refer to 10-9.
Check the 63L side of connecting wire.
Check refrigerant pressure.
Charge additional refrigerant.
Check continuity by tester.
Replace the parts if the parts are defective.
Replace outdoor controller circuit board.
F9
(4119)
2 connector open
Abnormal if both 63H and 63L connector
circuits are open for 3 minutes continuously
after power supply.
63H: High-pressure switch
63L: Low-pressure switch
<RP250 only>
Disconnection or contact failure
of connector (63H,63L) on
outdoor controller circuit board.
Disconnection or contact failure
of 63H, 63L.
63H and 63L are working due
to defective parts.
Defective outdoor controller
circuit board.
Check connection of connector(63H,63L) on
outdoor controller circuit board.
Refer to 10-9.
Check the 63H and 63L side of connecting
wire.
Check continuity by tester.
Replace the parts if the parts are defective.
Replace outdoor controller circuit board.
