Wiring Diagram - Mitsubishi Electric PUHZ-SP125VKA Service Manual

9-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is ON>
Abnormal points and detection method
Check 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)
Note: Refer to indoor unit section for code P and code E.
OCH671
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, L2 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 (DCL
or ACL)
5 Disconnection of outdoor power
—
circuit board (PUHZ-SP·VKA)/
outdoor noise filter circuit board
(PUHZ-SP·YKA) or parts fail-
ure in outdoor power circuit
board (PUHZ-SP·VKA)/outdoor
noise filter circuit board (PUHZ-
SP·YKA)
6 Defective outdoor power circuit
board
7 Open of rush current protect
resistor (RS) (PUHZ-SP·YKA)
8 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
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.
3 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Refer to "9-9. TEST POINT DIAGRAM".
4 Check connection of reactor. (DCL or ACL)
Refer to "6. WIRING DIAGRAM".
5 a) Check connection of outdoor power circuit
board (PUHZ-SP·VKA)/outdoor noise filter
circuit board (PUHZ-SP·YKA).
b) Replace outdoor power circuit board
(PUHZ-SP·VKA)/outdoor noise filter circuit
board (PUHZ-SP·YKA).
Refer to "9-9. TEST POINT DIAGRAM".
6 Replace outdoor power circuit board.
7 Replace rush current protect resistor (RS)
* Power circuit board might be short-circuit.
Check the power circuit board. (Refer to
"9-9. TEST POINT DIAGRAM")
8 Replace controller 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 "9-9. TEST POINT DIAGRAM".
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.
32
Judgment and action