Mitsubishi Electric PUHZ-W85VHA2 Service Manual page 14

8-3. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Abnormal point and detection method
Error Code
None
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously from being
switched on.
63H: High-pressure switch
F5
1 No voltage is supplied to termi-
nal block (TB1) of outdoor unit.
a) Power supply breaker is
b) Contact failure or disconnec-
c) Open phase (L or N phase)
2 Electric power is not charged to
power supply terminal of out-
door power circuit board.
a) Contact failure of power
b) Open phase on the outdoor
3 Electric power is not supplied
to outdoor controller circuit
—
board.
a) Disconnection of connector
4 Disconnection of reactor (DCL)
5 Disconnection of outdoor noise
filter circuit board or parts fail-
ure in outdoor 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
turned off.
tion of power supply terminal
supply terminal
power circuit board
Disconnection of connector
TABT or TABS
(CNDC)
14
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.
Check connection of the connector TABT or TABS.
Refer to 8-6.
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 8-6.
4 Check connection of reactor. (DCL)
Check connection of "L1" and "L2" on the
active filter module. (ACTM)
Refer to 8-6.
5 a) Check connection of outdoor noise filter
circuit board. Refer to 8-6.
b) Replace outdoor noise filter circuit board.
Refer to 8-6.
6 Replace outdoor power circuit board.
7 Replace controller board (When items
above are checked but the units can not be
repaired.)
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to 8-6.
2 Check the 63H side of connecting wire.
3 Check for continuity of 63H.
Replace high pressure switch if it is defective.
4 Replace outdoor controller circuit board.