Self-Diagnosis Action Table - Mitsubishi Electric Mr.Slim PUHZ-RP200YHA Service Manual

12-4. SELF-DIAGNOSIS ACTION TABLE

<Abnormalities detected when the power is put on>
Error Code Meaning of error code and detection method
None
63L connector open
Abnormal if 63L connector circuit is open
for three minutes continuously after power
supply.
63L: Low-pressure switch
F3
(5202)
63H connector open
Abnormal if 63H connector circuit is open
for three minutes continuously after power
supply.
F5
63H: High-pressure switch
(5201)
2 connector open
Abnormal if both 63H and 63L connector
circuits are open for three minutes continu-
ously after power supply.
F9
(4119)
63H: High-pressure switch
63L: Low-pressure switch
1 No voltage is supplied to terminal
block(TB1) of outdoor unit.
a) Power supply breaker is put
off.
b) Contact failure or discon-
nection 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 outdoor noise
filter circuit board or parts failure
in outdoor noise filter circuit
board.
—
4 Defective outdoor controller
circuit board.
1 Disconnection or contact failure
of 63L connector on outdoor
controller circuit board.
2 Disconnection or contact failure
of 63L.
3 63L is working due to refriger-
ant leakage or defective parts.
4 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.
1 Disconnection or contact failure
of connector (63H,63L) on
outdoor controller circuit board.
2 Disconnection or contact failure
of 63H, 63L.
3 63H and 63L are working due
to defective parts.
4 Defective outdoor controller
circuit board.
(Note 1) Refer to indoor unit section for code P and code E.
Case
1 Check following items.
a) Power supply breaker
b) Connection of power supply terminal block.
c) Connection of power supply terminal block.
2 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector, (CNDC)
the outdoor noise filter circuit board.
Refer to 12-9.
3 a) Check connection of outdoor noise filter
b) Replace outdoor noise filter circuit board.
4 Replace controller board (When items above
are checked but the units can not be repaired.)
1 Check connection of 63L connector on
outdoor controller circuit board.
Refer to 12-9.
2 Check the 63L side of connecting wire.
3 Check refrigerant pressure.
Charge additional refrigerant.
Check continuity by tester.
Replace the parts if the parts are defective.
4 Replace outdoor controller circuit board.
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to 12-9.
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.
1 Check connection of connector(63H,63L) on
outdoor controller circuit board.
Refer to 12-9.
2 Check the 63H and 63L side of connecting
wire.
3 Check continuity by tester.
Replace the parts if the parts are defective.
4 Replace outdoor controller circuit board.
28
Judgment and action
(TB1)
(TB1)
circuit board.
Refer to 12-9.