43
12-2. Instruction of troubleshooting (1)
(SLZ-A09AR.TH / SUZ-A09VR.TH)
(SLZ-A12AR.TH / SUZ-A12VR.TH)
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Indoor unit
operates.
Outdoor unit
doesn't operate
normally
.
Indoor unit
doesn't receive
the signal from
remote controller
.
OPERA
TION INDICA
T
O
R
lamp on the indoor unit is
blinking.
Outdoor unit
operates in
only T
est
Run
operation.
Outdoor unit
doesn't
operate
even in
T
est Run
operation.
Indoor unit
operates, when
the EMERGENCY
OPERA
TION
switch is pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERA
TION
switch is pressed.
Check room
temperature
thermistor
.
Refer to
"T
rouble
criterion of
main parts".
Refer to
A
"Check of
inverter/
compressor"
on page 52.
Refer to
"TROUBLESHOOTING".
1. Check indoor / outdoor
connecting wire.
(Check if the power
is supplied to the
indoor unit.)
2. Refer to
"TROUBLESHOOTING".
Unit doesn't
operate
normal
operation in
COOL
or
HEA
T
mode.
Refer to
H
"Check of
R.V
. coil"
on page 54.
Cause:
Indoor /
Outdoor unit
•
Indoor-Outdoor
signal error
Check the
outdoor
inverter P
.C.
board.
Refer to "
N
How to check
mis-wiring"
on page 57.
Cause:
Indoor /
Outdoor unit
• Mis-wiring
1 blinking
3 blinking
5 blinking
6 blinking
7 blinking
9 blinking
2 blinking
Check the
wiring out
between the
indoor and
outdoor
.
Refer to "
N
How to check
mis-wiring"
on page 57.
Exchange the
indoor
controller
board.
Refer to "
N
How to check
mis-wiring"
on page 57.
Cause:
Indoor unit
• Mis-
connecting of
the room
temperature
thermistor
.
• T
roble
of
the room
temperature
thermistor
.
• T
roble
of
the indoor
controller
board.
Cause:
Indoor unit
• Mis-
connecting of
the condenser
/evaporator
temperature
thermistor
.
• T
roble
of
the condenser
/evaporator
temperature
thermistor
.
• T
roble
of
the indoor
controller
board.
Cause:
Indoor unit
• Short cycle
of air cycle
• Dirty air filter
• Damaged fan
• Abnormal
refrigerant
Cause:
Indoor unit
• Mis-
connecting of
the indoor
drain sensor
• T
roble
of
the indoor
drain sensor
• T
roble
of
the indoor
controller
board.
Cause:
Outdoor unit
• T
rouble
of
outdoor
control
system
• Reinsert the
connector
(CN20)
• Check the
resistance value
of the thermistor
• Exchange
the indoor
controller board
Cause:
Indoor unit
• Mis-
connecting
of the pipe
temperature
thermistor/liquid.
• T
roble
of
the pipe
temperature
thermistor/liquid.
• T
roble
of
the indoor
controller
board.
• Reinsert the
connector
(CN21)
• Check the
resistance value
of the thermistor
• Exchange
the indoor
controller board
• Reinsert the
connector
(CN29)
• Check the
resistance value
of the thermistor
• Exchange
the indoor
controller board
Cause:
Outdoor unit
• Miss-
connecting of
the outdoor
thermistor
.
• T
rouble
of
the outdoor
thermistor
.
• T
rouble
of
the outdoor
inverter P
.C.
board.
• Reinsert the
connector
• Check the
resistance value
of the thermistor
• Exchange
the outdoor
inverter P
.C.
board.
Cause:
Indoor unit
• Malfunction
of drain pump
• Damaged
drain sensor
• Check the
drain pump.
• Check the
drain sensor
.
Cause:
Outdoor unit
• Outdoor
power
system
abnormality
• Refer to
A
"Check of
inverter/
compressor"
on page 52.
• Reinsert the
connector
(CN31)
• Check the
resistance value
of the thermistor
• Exchange
the indoor
controller board
• Clear
obstructions
from air cycle.
• Clear the air
filter
.
•
Check the fan
• Check the
refrigerant
temperature.
• Exchange
the outdoor
inverter P
.C.
board and
others.
As for indoor unit SLZ type,
refer to service manual OC302.
EMERGENCY OPERATION
switch (COOL)
OPERATION INDICATOR lamp
EMERGENCY OPERATION
switch (HEAT)
OC304A --2qxp 04.6.29 8:33 AM Page 43
