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.
OPERATION INDICATOR
lamp on the indoor unit is
blinking.
Outdoor unit
operates in
only Test Run
operation.
Outdoor unit
doesn't
operate
even in
Test Run
operation.
Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.
Check room
temperature
thermistor.
Refer to
"Trouble
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
HEAT 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 blinking2 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.
• Troble of
the room
temperature
thermistor.
• Troble of
the indoor
controller
board.
Cause:
Indoor unit
• Mis-
connecting of
the condenser
/evaporator
temperature
thermistor.
• Troble of
the condenser
/evaporator
temperature
thermistor.
• Troble 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
• Troble of
the indoor
drain sensor
• Troble of
the indoor
controller
board.
Cause:
Outdoor unit
• Trouble 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.
• Troble of
the pipe
temperature
thermistor/liquid.
• Troble 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.
• Trouble of
the outdoor
thermistor.
• Trouble 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
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