Self-Diagnosis Action Table - Mitsubishi Electric Mr.SLIM PUZ-A42NHA5-BS Service Manual

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.
Abnormal point and detection method
Error Code
None
63H connector open
Abnormal if 63H connector circuit is open for
3 minutes continuously after power supply.
63H: High-pressure switch
F5
(5201)
OCH512
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 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
Case
1 Check following items.
2 Check following items.
3 Check connection of the connector (CNDC)
4 Check connection of "L1" and "L2" on the
5 a) Check connection of outdoor noise filter
6 Replace outdoor power circuit board.
7 Replace controller board (When items
1 Check connection of 63H connector on
2 Check the 63H side of connecting wire.
3 Check continuity by tester.
4 Replace outdoor controller circuit board.
27
Judgment and action
a) Power supply breaker
b) Connection of power supply terminal block
(TB1)
c) Connection of power supply terminal block
(TB1)
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.
on the outdoor controller circuit board.
Refer to 10-9.
active filter module. (ACTM) Refer to 10-9.
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 10-9.
above are checked but the units cannot be
repaired).
outdoor controller circuit board.
Refer to 10-9.
Replace the parts if the parts are defective.