Mitsubishi Electric PUHZ-ZRP100VKA3 Service Manual page 35

10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is put on>
Check Code Abnormal points and detection method
None
63H connector open
Abnormal if 63H connector circuit is open for
3 minutes continuously after power supply.
63H: High pressure switch
F5
(5201)
OCH645
1 No voltage is supplied to terminal
block (TB1) of outdoor unit.
a) Power supply breaker is turned
b) Contact failure or disconnec-
c) Open phase (L, L2 or N phase)
2 Electric power is not supplied to
power supply terminal of outdoor
power circuit board.
a) Contact failure of power supply
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,
ACL4 or ACL)
5 Disconnection of outdoor noise
filter circuit board or parts failure
in outdoor noise filter circuit board
(ZRP100–250Y)
6 Defective outdoor power circuit
board
7 Open of rush current protect
resistor (RS) (ZRP100–250Y)
8 Defective outdoor controller circuit
board
1 Disconnection or contact failure
of 63H connector on outdoor con-
troller circuit board
2 Disconnection or contact failure of
63H
3 63H is working due to defective
parts.
4 Defective outdoor controller circuit
board
Note: Refer to indoor unit section for codes starting with P and E.
Case
off.
tion of power supply terminal
terminal
power circuit board
(Disconnection of terminal on
outdoor power circuit board)
(CNDC)
35
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
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
(ZRP100–140V)/noise filter circuit board.
(ZRP100–250Y). Refer to "10-9. TEST
POINT DIAGRAM".
4 Check connection of reactor. (DCL, ACL4
or ACL)
Refer to "7. WIRING DIAGRAM".
5 a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to "10-9. 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
"10-9. 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 "10-9. 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.