12-2
TROUBLESHOOTING
Revision Y06-02
Service Manual - KN Series
ATTENTION : check for broken or loose c
a
ble lu
g
s first
NO SYMPTON
PROBABLE
CAUSE
CORRECTIVE
ACTION
9. Only
indoor
f
a
n
a
nd
compressor workin
g
.
Outdoor f
a
n blocked.
- Remove obstructions.
10.
Only indoor f
a
n
workin
g
.
-Run c
a
p
a
citor of outdoor
f
a
n motor f
a
ulty.
-Windin
g
s of outdoor f
a
n
a
re shorted.
- Repl
a
ce c
a
p
a
citor.
-Repl
a
ce motor.
11. No
coolin
g
or he
a
tin
g
t
a
kes pl
a
ce, indoor
a
nd outdoor f
a
ns
workin
g
.
- Overlo
a
d s
a
fety device on
compressor is cut out (low
volt
ag
e or hi
g
h
temper
a
ture)
- Compressor run c
a
p
a
citor
f
a
ulty.
- Compressor windin
g
s
a
re
shorted.
- Check for proper volt
ag
e, switch off power
a
nd try
aga
in
a
fter one hour.
- Repl
a
ce compressor c
a
p
a
citor.
- Repl
a
ce compressor.
1
2
.
No
a
ir supply
a
t
indoor unit,
compressor
oper
a
tes.
-Indoor f
a
n motor is blocked
or turns slowly.
-indoor f
a
n run c
a
p
a
citor
f
a
ulty.
- motor windin
g
s
a
re
shorted.
- Check volt
ag
e,rep
a
ir wirin
g
if necess
a
ry.
-Check f
a
n wheel if it is ti
g
ht enou
g
h on
motor sh
a
ft,ti
g
hten if necess
a
ry.
-Repl
a
ce indoor f
a
n motor.
13. P
a
rti
a
l, limited
a
ir
supply
a
t indoor
indoor unit.
L
a
ck of refri
g
er
a
nt (will
a
ccomp
a
nied by whistelin
g
noise) c
a
use ice form
a
tion
on indoor unit coil in coolin
g
mode.
-Ch
a
r
g
e the unit
a
fter loc
a
li
z
in
g
le
a
k.
14. W
a
ter
a
ccumul
a
tes
a
nd overflow from
indoor unit section.
Dr
a
in tube or spout of dr
a
in
p
a
n clo
gg
ed.
-Dis
a
semble pl
a
stic dr
a
in tube from spout of
indoor unit dr
a
in p
a
n.
15. W
a
ter drippin
g
from
outdoor unit b
a
se.
(in he
a
tin
g
mode)
W
a
ter dr
a
in outlet is
clo
gg
ed.
-Open outdoor unit cover cle
a
n out w
a
ter
outlet ,cle
a
n the b
a
se inside throu
g
ly.
16.
Free
z
e-up of outdoor
coil in he
a
tin
g
mode,
poor he
a
tin
g
effect in
room, indoor f
a
n
oper
a
tes.
-F
a
ulty outdoor thermistor.
-F
a
ulty control c
a
ble.
- Outdoor temper
a
ture is
too low (below -10°C)
-Outdoor unit
a
ir outlet is
blocked.
-Repl
a
ce thermistor.
- Rep
a
ir control c
a
ble.
-
S
hut unit off, outdoor temp. is below desi
g
n
conditions
a
nd c
a
nnot function properly.
-Remove obstructions.
Summary of Contents for KN 24 RC
Page 50: ...9 2 REFRIGERATION DIAGRAMS Revision Y06 02 Service Manual KN Series 9 1 2 KN 30 R410A...
Page 51: ...9 3 REFRIGERATION DIAGRAMS Revision Y06 02 Service Manual KN Series 9 1 3 KN 36 R410A...
Page 52: ...9 4 REFRIGERATION DIAGRAMS Revision Y06 02 Service Manual KN Series 9 1 4 KN 36T R410A...
Page 53: ...9 5 REFRIGERATION DIAGRAMS Revision Y06 02 Service Manual KN Series 9 1 5 KN 45T R410A...
Page 57: ...11 2 CONTROL SYSTEM Revision Y06 02 Service Manual KN Series 11 1 3 Main PCB Controller...