Self-Diagnosis Action Table - Mitsubishi Electric PUHZ-P100VHA2 Service Manual

11-4. 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.
Error Code Abnormal points and detection method
None
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously after power is
supplied.
F5
63H: High-pressure switch
(5201)
OCH415G
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 supplied
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
TABT or TABS (LI or NI :
VHA3R2)
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 noise
filter circuit board or parts failure
in outdoor noise filter circuit
board
As for VHA2
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 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
:Disconnection of connector
/ VHA3(R1), it is
(1)
50
Judgment and action
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
(LI or NI : VHA3R2/R3, VHA4)
Refer to 11-9.
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 (V) / the
noise filter (Y).
Refer to 11-9.
4 Check connection of reactor. (DCL or ACL)
Check connection of "L1" and "L2" on the active
filter module. ((ACTM) VHA2
"DCL1" and "DCL2" on the power circuit board
(VHA3R2/R3, VHA4).
5 a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 11-9.
6 Replace outdoor power circuit board.
7 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 11-9.
2 Check the connecting wire on 63H side.
3 Check continuity by tester.
Replace the parts if the parts are defective.
4 Replace outdoor controller circuit board.
/ VHA3(R1))
(1)