Fujitsu AirStage AB12, Service Manual

Page: 93 / 199

ERROR
CONTENTS ERROR CAUSE
REMEDY
ERROR
CODE
0D
1. Generation condition
Thermistor short or open
detected.
2. Corresponding operation
Indoor unit stopped, error
display to indoor unit LED,
and error output to
communication bus line.
3. Reset condition
Thermistor detection value
other than short or open.
1. Generation condition
Float SW ON continuously
for 3 minutes.
2. Corresponding operation
Indoor unit stopped, error
display to indoor unit LED,
and error output to
communication bus line.
3. Reset condition
Float SW turned OFF. 1. Clean drain hose.
2. Clean drain outlet.
3. Check drain pump operation. If faulty,
replace pump.
4. When float SW shorted, replace SW.
1. Drain hose clogged.
2. Drain outlet clogged.
3. Drain pump faulty.
4. Float SW operation faulty
(short)
Blower tempe-
rature thermistor
error
11 Drain abnormal
1. Generation condition
Room temperature thermistor
detected temperature
exceeds 60 C continuously
for 30 minutes or longer
during indoor unit operation.
2. Corresponding operation
Indoor unit stopped, error
display to indoor unit LED,
and error output to
communication bus line.
3. Reset condition
Reset by turning power off
and on again.
12 Room temperature
thermistor error
1. Generation condition
Fan speed feedback by large
type ceiling model (AB30 or
above) +/-400rpm or greater
relative to target speed.
2. Corresponding operation
Indoor fan stopped, error
display to indoor unit LED,
error output to
communication bus line.
3. Reset condition
Reset by turning power off.
13 Indoor unit fan
error
1. Check for loose or dislodged blower
temperature thermistor connector.
2. Check resistance of blower temperature
thermistor. If abnormal, replace thermistor.
1. Connector connection faulty.
2. Blower temperature thermistor
faulty.
1. Check for loose or dislodged room
temperature connector.
2. Check resistance of room temperature
thermistor. If abnormal, replace
thermistor.
1. Connector connection faulty.
2. Room temperature
thermistor faulty.
1. Check indoor fan motor lead wire
wiring.
2. Check if rated power line voltage
supplied.
1. Indoor fan motor lead wire
connection faulty.
2. Power line voltage abnormal.
1. Generation condition
Communication impossible
between standard wired remote
controller and indoor unit.
2. Corresponding operation
Error display to indoor unit LED.
3. Reset condition
Standard wired remote
controller communication
restored.
18
Communication
error
(indoor unit-
remote controller) 1. Check if communication line connected
to each indoor unit. Check for
communication line open and loose
connection.
2. Replace indoor unit control PC board.
3. Replace standard wired remote
controller PC board.
1. Communication line not
connected, connector faulty,
or line open.
2. Indoor unit control PC board
faulty.
3. Standard wired remote
controller PC board faulty.
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