Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual page 40

10-3. 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
(ZM60-250)
TRS connector open
Abnormal if TRS connector circuit is open for
3 minutes continuously after power supply.
F5
TRS:Thermal protector
(5201)
(ZM200/250)
OCH771C
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)
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
Electric power is not supplied to
outdoor controller circuit board.
a) Disconnection of connector
―
Disconnection of reactor (DCL,
ACL4 or ACL)
Disconnection of outdoor noise
filter circuit board or parts failure
in outdoor noise filter circuit board
(ZM100–250Y)
Defective outdoor power circuit
board
Open of rush current protect
resistor (RS) (ZM100–250Y)
Defective outdoor controller circuit
board
Disconnection or contact failure of
63H or TRS connector on outdoor
controller circuit board
Disconnection or contact failure of
63H or TRS
63H or TRS is working due to
defective parts.
Defective outdoor controller circuit
board
Note: Refer to indoor unit section for codes starting with P and E.
Cause
off.
tion of power supply terminal
terminal
power circuit board
(Disconnection of terminal on
outdoor power circuit board)
(CNDC)
40
Judgment and action
Check following items.
a) Power supply breaker
b) Connection of power supply terminal
block. (TB1)
c) Connection of power supply terminal
block. (TB1)
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 (CNDC)
on the outdoor controller circuit board.
Check connection of the connector CNDC
on the outdoor power circuit board (ZM60–
140V)/noise filter circuit board (ZM100–
250Y). Refer to "10-8. TEST POINT
DIAGRAM".
Check connection of reactor. (DCL, ACL4
or ACL)
Refer to "7. WIRING DIAGRAM".
a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to "10-8. TEST POINT DIAGRAM".
Replace outdoor power circuit board.
Replace rush current protect resistor (RS)
Power circuit board might be short-circuit.
Check the power circuit board. (Refer to
"10-8. TEST POINT DIAGRAM".)
Replace controller board (When items
above are checked but the units cannot be
repaired.)
Check connection of 63H and TRS
connector on outdoor controller circuit
board.
Refer to "10-8. TEST POINT DIAGRAM".
Check the 63H and TRS side of connect-
ing wire.
Check continuity by tester.
Replace the parts if the parts are defective.
Replace outdoor controller circuit board.