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11-4. 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 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)
2
Electric power is not supplied to
outdoor controller circuit board.
a) Disconnection of connector
(CNDC)
3
Disconnection of reactor
(ACL4)
4
Disconnection of outdoor noise
filter circuit board or parts fail-
ure in outdoor noise filter circuit
board
5
Defective outdoor controller
circuit
board
1
Check following items.
a) Power supply breaker
b), 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 on
the outdoor noise filter circuit board.
Refer to 11-9.
3
Check
connection of reactor. (ACL4)
4
a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 11-9.
5
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
1
Disconnection or contact failure
of 63H connector on outdoor
controller circuit board
2
Disconnection or contact failure
of 63H
3
63H is operating due to defec-
tive parts.
4
Defective outdoor controller
circuit
board
1
Check connection of 63H connector on
outdoor controller circuit board.
Refer to 11-9.
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.
OCH424E
