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8-3. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Check Code
Abnormal point and detection method
None
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously from being
switched on.
63H: High-pressure switch
F5
OCH605A
1 No voltage is supplied to terminal
block (TB1) of outdoor unit.
a) Power supply breaker is
turned off.
b) Contact failure or
disconnection of power
supply terminal
c) Open phase (L or N phase)
2 Electric power is not charged
to power supply terminal of
outdoor power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
Disconnection of connector R or S
3 Electric power is not supplied
to outdoor controller circuit
board.
a) Disconnection of connector
—
(CNDC)
4 Disconnection of reactor
5 Defective outdoor power cir-
cuit board
6 Defective outdoor controller
circuit board
1 Disconnection or contact fail-
ure of 63H connector on out-
door controller circuit board
2 Disconnection or contact fail-
ure of 63H
3 63H is working due to defec-
tive parts.
4 Defective outdoor controller
circuit board
Case
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
Check connection of the connector R or S.
Refer to "8-6. TEST POINT DIAGRAM".
3 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector (CNDC)
on the outdoor power circuit board.
4 Check connection of "TBL2" and "TBL4" on
the outdoor power circuit board.
Refer to "8-6. TEST POINT DIAGRAM".
5 Replace outdoor power circuit board.
6 Replace outdoor controller circuit board
(When items above are checked but the
units cannot be repaired.)
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to "8-6. TEST POINT DIAGRAM".
2 Check the 63H side of connecting wire.
3 Check for continuity of 63H.
Replace high pressure switch if it is defec-
tive.
4 Replace outdoor controller circuit board.
14
Judgment and action
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