Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[H02]
[Compressor lock]
I
s
power
su
pply voltage normal?
AC198 to 264V
NO
Correct power
su
pply line.
NO
Compre
ss
or lock
→
Replace
Check wire connection
and correct it.
YES
I
s
wire connection correct?
Compre
ss
or lead
(P.C. board
s
ide, Compre
ss
or
s
ide),
Reactor lead, Power
su
pply lead
YES
Check o
u
tdoor P.C. board.
Fail
u
re
→
Replace
* When replacing o
u
tdoor P.C.board, replace
the f
us
e.
I
s
compre
ss
or
u
nder correct condition
s
?
NO
YES
NO
NO
Check TE, TS
s
en
s
or
s
and PMV.
Fail
u
re
→
Replace
I
s
there refrigerant
s
tagnation?
YES
Doe
s
PMV correctly operate?
YES
[H03]
[Current detection circuit trouble]
Are CN609 connection and
ca
s
e thermo
s
tat correct?
Check o
u
tdoor P.C. board (MCC-1705).
Fail
u
re
→
Replace
[H04]
[Case thermostat operation]
NO
Open
s
ervice valve f
u
lly.
NO
YES
YES
Check o
u
tdoor P.C. board.
Fail
u
re
→
Replace
* When replacing o
u
tdoor P.C.board,
replace the f
us
e.
NO
When
s
horting the ca
s
e
thermo
s
tat, can yo
u
perform
the cooling/heating operation?
NO
Correct connector.
Ca
s
e thermo
s
tat tro
u
ble
→
Replace
Replace the PMV.
I
s
there ga
s
leak?
I
s
there refrigerant
s
hortage?
YES
Fa
u
lt part repair.
Recharge refrigerant.
I
s
s
ervice valve f
u
lly opened?
NO
Check cr
us
hed or broken pipe.
Fa
u
lt part repair
YES
YES
I
s
PMV normal?
FILE NO. SVM-18041
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