Failure mode detected by outdoor unit
Operation of diagnostic function
Check code
Status of
air conditioner
Condition
Cause of operation
Judgment and measures
Indoor unit
F04
Di
s
connection,
s
hort of di
s
charge
temp.
s
en
s
or (TD)
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check di
s
charge temp.
s
en
s
or (TD).
2. Check o
u
tdoor P.C. board (MCC-1705).
F06
Di
s
connection,
s
hort of o
u
tdoor temp.
s
en
s
or (TE)
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check temp.
s
en
s
or (TE).
2. Check o
u
tdoor P.C. board (MCC-1705).
F07
Di
s
connection,
s
hort of o
u
tdoor temp.
s
en
s
or (TL)
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check temp.
s
en
s
or (TL).
2. Check o
u
tdoor P.C. board (MCC-1705).
F12
Di
s
connection,
s
hort of
su
ction temp.
s
en
s
or (TS)
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check
su
ction temp.
s
en
s
or (TS).
2. Check o
u
tdoor P.C. board (MCC-1705).
F15
Mi
ss
-mo
u
nting of o
u
tdoor temp.
s
en
s
or (TE, TS)
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check temp.
s
en
s
or (TE, TS).
2. Check o
u
tdoor P.C. board (MCC-1705).
F08
Di
s
connection,
s
hort of o
u
t
s
ide temp.
s
en
s
or (TO)
Contin
u
e
Di
s
played when
tro
u
ble i
s
detected
1. Check o
u
t
s
ide temp.
s
en
s
or (TO).
2. Check o
u
tdoor P.C. board (MCC-1705).
F1
3
Di
s
connection,
s
hort of heat
s
ink
temp.
s
en
s
or (TH)
Stop
Di
s
played when
tro
u
ble i
s
detected
L29
Comm
u
nication tro
u
ble between
o
u
tdoor P.C. board MCU
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check o
u
tdoor P.C. board (MCC-1705).
(Q201 i
s
incorporated in TH
s
en
s
or.)
F
3
1
O
u
tdoor P.C. EEPROM tro
u
ble
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check o
u
tdoor P.C. board (MCC-1705).
L10
Un
s
et j
u
mper of
s
ervice P.C. board
Stop
Di
s
played when
tro
u
ble i
s
detected
1. O
u
tdoor
s
ervice P.C. board
Check model type
s
etting j
u
mper wire.
1. Check o
u
tdoor P.C. board
(MCC-1705).
F2
3
P
s
s
en
s
or tro
u
ble
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check connection of P
s
s
en
s
or connector.
2. Check fail
u
re of P
s
s
en
s
or.
3
. Check compre
ss
ing power tro
u
ble of compre
ss
or.
4. Check 4-way valve tro
u
ble.
5. Check o
u
tdoor P.C. board tro
u
ble.
P07
Heat
s
ink overheat tro
u
ble
∗
Heat
s
ink temp.
s
en
s
or detected
over
s
pecified temperat
u
re.
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check
s
crew tightening between PC. Board and heat
s
ink and check radiator grea
s
e (MCC-1705).
2. Check heat
s
ink bla
s
t path.
H02
Compre
ss
or lock
∗
Over-c
u
rrent detection after
compre
ss
or
s
tart-
u
p
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Tro
u
ble of compre
ss
or (Lock, etc.): Replace compre
ss
or.
2. Wiring tro
u
ble of compre
ss
or (Open pha
s
e)
H0
3
C
u
rrent detection circ
u
it tro
u
ble
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check o
u
tdoor P.C. board (MCC-1705).
(AC c
u
rrent detection circ
u
it)
P15
Detection of ga
s
leak
∗
Di
s
charge temp.
s
en
s
or (TD),
S
u
ction temp.
s
en
s
or (TS) detected
temperat
u
re over
s
pecified temp.
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check ga
s
leak, recharge
2. Check f
u
ll open of
s
ervice valve.
3
. Check PMV (P
u
l
s
e Motor Valve).
4. Check broken pipe.
5. Check di
s
charge temp.
s
en
s
or (TD),
su
ction temp.
s
en
s
or (TS).
P19
4-way valve inver
s
e tro
u
ble
∗
After heating operation ha
s
s
tarted,
indoor heat exchanger temp. lower
s
u
nder the
s
pecified temp.
∗
After heating operation ha
s
s
tarted,
o
u
tdoor heat exchanger /
su
ction
temp. ri
s
e
s
over the
s
pecified temp.
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check operation of 4-way valve.
2. Check o
u
tdoor heat exchanger (TE),
su
ction temp.
s
en
s
or (TS).
3
. Check indoor heat exchanger
s
en
s
or (TC).
4. Check 4-way valve coil.
5. Check PMV (P
u
l
s
e Motor Valve).
H01
Compre
ss
or break down
∗
Altho
u
gh operation ha
s
s
tarted,
operation freq
u
ency decrea
s
e
s
and
operation
s
top
s
.
Stop
Di
s
played when
tro
u
ble i
s
detected
1. Check power
su
pply voltage. (AC198 to 264V)
2. Overload operation of refrigerating cycle
FILE NO. SVM-18041
- 49 -
