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23. SELF
F DIAGNOS
STIC FUNC
EXPLAINA
ATION OF
F SELF-DIA
- Self-diag
gnostic func
ction is the
- The prin
nted circuit b
boards exist
to detec
ct malfunctio
on and autom
- Once a m
malfunction
Hi Wall S
53KHR
RT12-708
53KHR
RT18-708
Ma
lfunction
R
Reason
Return Air
Sensor
( open or s
short circuit
Indoor Coi
l Sensor
( open or s
short circuit
Indoor Fan
n Motor has
out of cont
trol for over
1 minute
Compresso
or Overload
d
cuts out 4
times
Electronic
Control PCB
B
( EEPROM
error )
No over – z
zero signal
Refrigeran
nt leak
Leds Statu
us Refers
X
= OFF
F
= ON
= Flas
sh at 5Hz
= Flas
sh continuo
ously
1- Prior
r to the malfu
unction repa
break
ker to OFF p
position.
2- After
r repairing th
2-1 c
connect the
2-2 o
operate the a
air condition
CTION FOR
R MALFUN
AGNOSTIC
C FUNCTIO
key for succ
ting inside t
the indoor u
matically sto
is detected
d, the lamps
Indoor U
nit
plit System
ms
Le
L
Led
)
)
been
X
X
X
X
To Malfun
ction Reas
air, disconn
he malfunct
tion:
electrical m
main supply b
ner by using
g the wireles
NCTIONS D
DETECTIO
ON
cess of air c
conditioner o
nit are equip
ops the ope
ration at the
of the indoo
or unit be as
ed
Malfunct
Reaso
Ret
turn Air Sen
nsor
( op
pen or short
Ind
oor Coil Sen
( op
pen or short
Out
tdoor Coil S
Sensor
( op
pen or short
Com
mpressor O
cut
ts out 4 time
es
Ele
ctronic Con
ntrol PCB
( EE
EPROM defe
Ind
oor / Outdoo
Com
mmunicatio
Out
tdoor unit p
wor
rks
Ref
frigerant lea
ak
son
Le
ds Status
X
X
= OFF
= ON
= Flash
= Flash
NOTES
ect the elec
trical mains
s supply by m
by moving t
he circuit br
ss remote co
51
N
operation.
pped with se
elf-diagnost
e air conditio
oner.
s per the bel
low tables :
Display Pa
H
Hi Wall Sp
plit System
ms
53KHR
RT24-708
Led
tion
n
X
t circuit )
nsor
t circuit )
X
t circuit )
verload
ect )
or units
X
n error
rotection
X
Refers To
Malfuncti
h at 5Hz
h continuou
usly
moving the
reaker to ON
N position
ontrol.
tic function
nel
Led
Led
X
X
X
X
X
X
X
X
X
X
on Reason
n
circuit
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