Mitsubishi Electric PUZ-HA30NHA5 Service Manual page 26

10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Check code Abnormal point and detection method
None
63L connector open
Abnormal if 63L connector circuit is open for
3 minutes continuously after power supply.
63L: Low pressure switch
F3
(5202)
OCH607
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
outdoor power circuit board.
a) Contact failure of power
supply 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
circuit board
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
Note: Refer to indoor unit section for the
codes starting with P and E.
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
Disconnection of connector TABT or
TABS
Refer to "10-9. 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. Refer to
"10-9. TEST POINT DIAGRAM".
4 Check connection of reactor. (DCL)
Check connection of "L1" and "L2" on the
active filter module.(ACTM)
Refer to "10-9. TEST POINT DIAGRAM".
5 a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to "10-9. TEST POINT DIAGRAM".
6 Replace outdoor power circuit board.
7 Replace controller board (When items
above are checked but the units cannot be
repaired).
1 Check connection of 63L connector on
outdoor controller circuit board.
Refer to "10-9. TEST POINT DIAGRAM".
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.
26
Judgment and action