Mitsubishi Electric Mr.SLIM PUHZ-RP6VHA, Technical & Service Manual

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Error Code Meaning of error code and detection method Case
Judgment and action
None —
1
No voltage is supplied to termi-
nal 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 (L or N phase)
2
Electric power is not charged
to power supply terminal of
outdoor power board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power board
RP3V :Disconnection of
connector R or S
RP4V~6V :Disconnection of
connector SC-R or SC-S
3
Electric power is not supplied to
outdoor controller board.
a) Disconnection of connector
(CNDC)
4
Disconnection of reactor (DCL
or ACL)
5
Disconnection of noise
filter(NF) or parts failure in
noise filter
6
Defective outdoor power board
7
Defective outdoor controller
board
1
Check following items.
a) Power supply breaker
b) Connection of power supply terminal block
c) Connection of power supply terminal block
2
Check following items.
a) Connection of power supply terminal block
b) Connection of terminal on outdoor power
board
3
Check connection between outdoor controller
board and outdoor power board
4
Check connection of reactor
5
a) Check connection of noise filter
b) Replace noise filter
6
Replace outdoor power board
7
Replace controller board (When items above
are checked but the units can not be
repaired.)
10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is put on>
(Note 1) Refer to indoor unit section for code P and code E.
F3
(5202)
63L connector open
Abnormal if 63L connector circuit is open
for three minutes continuously after power
supply.
63L: Low-pressure switch
<PUHZ-RP4~6VHA only>
1
Disconnection or contact failure
of 63L connector on outdoor
controller board
2
Disconnection or contact failure
of 63L
3
63L is working due to refriger-
ant leakage or defective parts.
4
Defective outdoor controller
board
1
Check connecting wire.
2
Check 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 board.
F9
(4119)
2 connector open
Abnormal if both 63H and 63L connector
circuits are open for three minutes continu-
ously after power supply.
63H: High-pressure switch
63L: Low-pressure switch
<PUHZ-RP4~6VHA only>
1
Disconnection or contact failure
of connector (63H,63L) on out-
door controller board
2
Disconnection or contact failure
of 63H, 63L
3
63H and 63L are working due
to defective parts
4
Defective outdoor controller
board
1
Check connecting wire.
2
Check connecting wire.
3
Check continuity by tester.
Replace the parts if the parts are defective.
4
Replace outdoor controller board.
F5
(5201)
63H connector open
Abnormal if 63H connector circuit is open
for three minutes continuously after power
supply.
63H: High-pressure switch 1
Disconnection or contact failure
of 63H connector on outdoor
controller board
2
Disconnection or contact failure
of 63H
3
63H is working due to defective
parts.
4
Defective outdoor controller
board
1
Check connecting wire.
2
Check connecting wire.
3
Check continuity by tester.
Replace the parts if the parts are defective.
4
Replace outdoor controller board.
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