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12-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is put on>
(Note 1) Refer to indoor unit section for code P and code E.
Error Code Meaning of error code and detection method
Case
Judgment and action
None
—
1
No voltage is supplied to terminal
block(TB1) of outdoor unit.
a) Power supply breaker is put
off.
b) Contact failure or discon-
nection of power supply
terminal.
c) Open phase (L2 or N phase)
2
Electric power is not supplied to
outdoor controller circuit board.
a) Disconnection of connector
(CNDC)
3
Disconnection of outdoor noise
filter circuit board or parts failure
in outdoor noise filter circuit
board.
4
Defective outdoor controller
circuit board.
1
Check following items.
a) Power supply breaker
b) Connection of power supply terminal block.
(TB1)
c) Connection of power supply terminal block.
(TB1)
2
Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector, (CNDC)
the outdoor noise filter circuit board.
Refer to 12-9.
3
a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 12-9.
4
Replace controller board (When items above
are checked but the units can not be repaired.)
F3
(5202)
63L connector open
Abnormal if 63L connector circuit is open
for three minutes continuously after power
supply.
63L: Low-pressure switch
1
Disconnection or contact failure
of 63L connector on outdoor
controller circuit board.
2
Disconnection or contact failure
of 63L.
3
63L is working due to refriger-
ant leakage or defective parts.
4
Defective outdoor controller
circuit board.
1
Check connection of 63L connector on
outdoor controller circuit board.
Refer to 12-9.
2
Check the 63L side of connecting wire.
3
Check refrigerant pressure.
Charge additional refrigerant.
Check continuity by tester.
Replace the parts if the parts are defective.
4
Replace outdoor controller circuit board.
F9
(4119)
2 connector open
Abnormal if both 63H and 63L connector
circuits are open for three minutes continu-
ously after power supply.
63H: High-pressure switch
63L: Low-pressure switch
1
Disconnection or contact failure
of connector (63H,63L) on
outdoor controller circuit board.
2
Disconnection or contact failure
of 63H, 63L.
3
63H and 63L are working due
to defective parts.
4
Defective outdoor controller
circuit board.
1
Check connection of connector(63H,63L) on
outdoor controller circuit board.
Refer to 12-9.
2
Check the 63H and 63L side of connecting
wire.
3
Check continuity by tester.
Replace the parts if the parts are defective.
4
Replace outdoor controller circuit board.
F5
(5201)
63H connector open
Abnormal if 63H connector circuit is open
for three minutes continuously after power
supply.
63H: High-pressure switch
1
Disconnection or contact failure
of 63H connector on outdoor
controller circuit board.
2
Disconnection or contact failure
of 63H.
3
63H is working due to defective
parts.
4
Defective outdoor controller
circuit board.
1
Check connection of 63H connector on
outdoor controller circuit board.
Refer to 12-9.
2
Check the 63H side of connecting wire.
3
Check continuity by tester.
Replace the parts if the parts are defective.
4
Replace outdoor controller circuit board.
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