Abnormal Operation Display - Fujitsu AB12 Service Manual

8-1-2 ABNORMAL OPERATION DISPLAY

O p e r a t i o n L a m p
0.1 sec. ON / OFF
flashing
0.5 sec. / 0.5 sec.
flashing 2 times
0.5 sec. / 0.5 sec.
flashing 3 times
0.5 sec. / 0.5 sec.
flashing 3 times
0.5 sec. / 0.5 sec.
flashing 3 times
0.5 sec. / 0.5 sec.
flashing 4 times
0.5 sec. / 0.5 sec.
flashing 5 times
0.5 sec. / 0.5 sec.
flashing 6 times
0.1 sec. ON / OFF
flashing 7 times
0.1 sec.ON/ OFF
0.1 sec. ON / OFF
flashing
Model data error
PCB fault.
Room temperature thermister error.
Thermister(CN19) open or short-circuited.
Indoor heat exchanger inlet temperature thermistor error.
Heat exchanger inlet thermister(CN20 1,2PIN) open or short-circuited.
Indoor heat exchanger intermediate temperature thermistor error.
Heat exchanger inlet thermister(CN20 3,4PIN) open or short-circuited.
Indoor heat exchanger outlet temperature thermistor error.
Heat exchanger outlet thermister(CN20 5,6PIN) open or short-circuited
Drain error (Float switch operation) The float switch operates and if there is no recovery within 3 minutes.
Inside of the hose stuffed, drain pump/float switch and PCB fault.
(When float switch is turned to ON, the compressor and the indoor fan stopped)
Serial communication error (between air conditioner unit and wired remote controller)
PCB fault.
Indoor fan error.
AB30-54: Indoor fan motor line(CN 4) or feedback line (CN 16) is disconnected/bad connected, PCB and indoor fan motor fault.
* When the indoor fan motor rotation is differ from the required rotation on the indoor fan phase control model(AB30-54), the in-
door fan becomes faulty due to the rotation does not feedback.
Discharge temperature thermistor error.
Discharge thermistor (CN 21) open or short-circuited.
Doubled indoor address and excessive connecting units.
Indoor unit address is doubled or units to be connected are excessive.
Outdoor unit error.
Outdoor unit faulty.
T i m e r L a m p S w i n g L a m p
0.1 sec. ON / OFF
flashing
0.1 sec. ON / OFF
flashing
0.1 sec. ON / OFF 0.5 sec. / 0.5 sec.
flashing flashing once
0.1 sec. ON / OFF 0.5 sec. / 0.5 sec.
flashing flashing 2 times
0.1 sec. ON / OFF
0.5 sec. / 0.5 sec.
flashing flashing 3 times
0.1 sec. ON / OFF
flashing
0.1 sec. ON / OFF
flashing
0.1 sec. ON / OFF
flashing
0.1 sec. ON / OFF
flashing
0.5 sec. ON / OFF 0.5 sec. ON / OFF
flashing 2 times flashing 2 times
0.5 sec. ON / OFF
0.5 sec. ON / OFF
flashing 3 times
flashing 3 times
Error contents
Model data error
Room temperature thermistor
error
Heat exchanger inlet tempera-
ture thermistor error
Heat exchanger intermediate te-
mperature thermistor error
Heat exchanger outlet tempera-
ture thermistor error
Drain error(Float switch operati-
on)
Serial communication error
Indoor fan error
Discharge temperature thermis-
tor error
Dduplicate indoor unit numbers,Nu-
mber of indoor units exeeds limit
Outdoor unit error
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