Self-Diagnosis Action Table - Mitsubishi Electric PUHZ-P200YHA Service Manual

11-4. 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 after power sup-
ply.
F5
63H: High-pressure switch
(5201)
OCH424E
1 No voltage is supplied to terminal
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 (L2 or N phase)
2 Electric power is not supplied to
outdoor controller circuit board.
a) Disconnection of connector
(CNDC)
—
3 Disconnection of reactor
(ACL4)
4 Disconnection of outdoor noise
filter circuit board or parts fail-
ure in outdoor noise filter circuit
board
5 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 operating due to defec-
tive parts.
4 Defective outdoor controller
circuit board
Case
1 Check following items.
2 Check connection of the connector (CNDC)
3 Check connection of reactor. (ACL4)
4 a) Check connection of outdoor noise filter
5 Replace controller board (When items above
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), c) Connection of power supply terminal
block (TB1)
on the outdoor controller circuit board.
Check connection of the connector CNDC on
the outdoor noise filter circuit board.
Refer to 11-9.
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 11-9.
are checked but the units cannot be repaired).
outdoor controller circuit board.
Refer to 11-9.
Replace the parts if the parts are defective.