Self-Diagnosis Action Table - Mitsubishi Electric Mr.SERVICE PUHZ-HRP71VHA Service Manual

11-4. SELF-DIAGNOSIS ACTION TABLE

<Abnormalities detected when the power is turned on>
Abnormal point and detection method
Error Code
None
63L connector open
Abnormal if 63L connector circuit is open for
3 minutes continuously after power supply.
63L: Low-pressure switch
F3
(5202)
63H connector open
Abnormal if 63H connector circuit is open for
3 minutes continuously after power supply.
63H: High-pressure switch
F5
(5201)
1 No voltage is supplied to termi-
nal block (TB1) of outdoor unit.
a) Power supply breaker is
turned off.
b) Contact failure or disconnec-
tion of power supply
terminal
c) Open phase (L or N phase)
2 Electric power is not charged to
power supply terminal of out-
door power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
HRP71, 100VHA :
Disconnection of connector
TABT or TABS
— 3 Electric power is not supplied
to outdoor controller circuit
board.
a) Disconnection of connector
(CNDC)
4 Disconnection of reactor (DCL
or ACL)
5 Disconnection of outdoor noise
filter circuit board or parts fail-
ure in outdoor noise filter circuit
board
As for HRP71, 100VHA, it is
especially needed to check the
resistance RS1 on the noise
filter circuit board.
6 Defective outdoor power circuit
board
7 Defective outdoor controller cir-
cuit 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
(Note 1) Refer to indoor unit section for code P and code E.
Case
HRP71, 100VHA2 :
Disconnection of connector
LI or NI
34
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
HRP71, 100VHA : Check connection of
the connector TABT or
TABS. Refer to 11-9.
HRP71, 100VHA2 : Check connection of
the connector LI or NI.
Refer to 11-9.
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(V)/the noise
filter(Y). Refer to 11-9.
4 Check connection of reactor. (DCL or ACL)
HRP71, 100VHA : Check connection of "L1"
and "L2" on the active filter
module.(ACTM)
Refer to 11-9.
HRP71, 100VHA2 : Check connection of
"DCL1" and "DCL2" on
the outdoor power circuit
board. Refer to 11-9.
5 a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 11-9.
6 Replace outdoor power circuit board.
7 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 11-9.
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 11-9.
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.