27
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.
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 (L1 or L2
phase)
2
Electric power is not charged to
power supply terminal of out-
door power circuit board.
a) Contact failure of power sup-
ply terminal
b) Open phase on the outdoor
power circuit board
Disconnection of connector
TABT or TABS
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
It is especially needed to check
the resistance RS1 on the
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
Disconnection of connector TABT or TABS
Refer to 10-9.
3
Check
connection of the connector (CNDC)
on the outdoor controller circuit board.
Refer to 10-9.
4
Check connection of “L1” and “L2” on the
active filter module. (ACTM) Refer to 10-9.
5
a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 10-9.
6
Replace outdoor power circuit board.
7
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 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 operating due to
defective parts.
4
Defective outdoor controller
circuit board
1
Check connection of 63H connector on
outdoor controller circuit board.
Refer to 10-9.
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.
Error Code
Abnormal point and detection method
Case
Judgment and action
OCH512
