Self-Diagnosis Action Table - Mitsubishi Electric PUHZ-FRP71VHA Service Manual

10-4. SELF-DIAGNOSIS ACTION TABLE

<Abnormalities detected when the power is put on>
Abnormal points and detection method
Error Code
None
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously after power sup-
ply.
63H: High-pressure switch
F5
(5201)
OCH544
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 (L or N phase)
2 Electric power is not supplied
to power supply terminal of out-
door power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
(Disconnection of terminal
on outdoor power circuit
board)
3 Electric power is not supplied
—
to outdoor controller circuit
board.
a) Disconnection of connector
(CNDC)
4 Disconnection of reactor (ACL)
5 Defective outdoor power circuit
board
6 Defective outdoor controller
circuit board
1 Disconnection or contact failure
of 63H connector on outdoor
controller circuit board
2 Disconnection or contact failure
of 63H
3 63H is working due to defective
parts.
4 Defective outdoor controller
circuit board
(Note 1) Refer to indoor unit section for code P and code E.
Case
1 Check following items.
2 Check following items.
3 Check connection of the connector (CNDC)
4 Check connection of reactor. (ACL)
5 Replace outdoor power circuit board.
6 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.
29
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.
on the outdoor controller circuit board.
Check connection of the connector, LD1
and LD2 on the outdoor power circuit board.
Refer to 10-9.
Check connection of "LO" and
"NO" on the outdoor noise filter circuit board.
Check connection of "R" and "S" on the
outdoor power circuit board.
Refer to 10-9.
above are checked but the units can not be
repaired.)
outdoor controller circuit board.
Refer to 10-9.
Replace the parts if the parts are defective.