Self-Diagnosis Action Table - Mitsubishi Electric PUHZ-RP3VHA Technical & Service Manual

10-4. 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)
<PUHZ-RP4~6VHA only>
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
<PUHZ-RP4~6VHA only>
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 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 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 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
(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 following items.
a) Connection of power supply terminal block
b) Connection of terminal on outdoor power
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.)
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.
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.
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.
28
Judgment and action
board