16
8-3. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Error Code
Abnormal point and detection method
Case
Judgment and action
None
—
1
No voltage is supplied to termi-
nal 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 (L or N phase)
2
Electric power is not charged to
power supply terminal of out-
door power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
3
Electric power is not supplied
to outdoor controller circuit
board.
a) Disconnection of connector
(CNDC)
4
Disconnection of reactor (DCL)
5
Disconnection of outdoor noise
filter circuit board or parts fail-
ure in outdoor noise filter circuit
board
6
Defective outdoor power circuit
board
7
Defective outdoor controller cir-
cuit 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 following items.
a) Connection of power supply terminal block
(TB1)
b) Connection of terminal on outdoor
power circuit board
3
Check
connection of the connector (CNDC)
on the outdoor controller circuit board.
Check
connection of the connector CNDC on
the outdoor noise filter. Refer to 8-7.
4
Check
connection of reactor. (DCL)
5
a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 8-7.
6
Replace outdoor power circuit board.
7
Replace controller board (When items above
are checked but the units can not be repaired).
F5
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously after power sup-
ply.
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 cir-
cuit board
1
Check connection of 63H connector on out-
door controller circuit board.
Refer to 8-7.
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.
F3
63L connector open
Abnormal if 63L connector circuit is open
for 3 minutes continuously after power sup-
ply.
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 cir-
cuit board
1
Check connection of 63L connector on
outdoor controller circuit board.
Refer to 8-7.
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
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 out-
door 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
board.
1
Check connection of connector (63H,63L) on
outdoor controller circuit board.
Refer to 8-7.
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.
OCH534
