User Manual

TROUBLESHOOTING
14-29
14.7.5 MONO SPLIT INDOOR (RAF-25/35/50PXA)
No Blinking of TIMER lamp Reason for indication Possible causes
1
When the indoor heat exchanger
temperature is too low in the heating
mode or it is too high in the cooling mode.
Reversing valve defective
1times
1) Reversing valve defective
2) Heat exchanger thermistor
disconnected (only in heating mode)
(Note)
The malfunction mode is displayed only
after the abnormal condition occurrs 3
rd
time (read every 3 minutes
2
Wh
en the outdoor unit is in forced
operation or balancing operation after
forced operation
Outdoor unit is under forced operation. Electrical parts in the outdoor unit.
3
When the interface signal from the
outdoor unit is interrupted.
Indoor/outdoor interface defective
1) Indoor interface circuit.
2) Outdoor interface circuit
4
When the error mode is detected times
within 30 minutes from outdoor unit
electrical components. (However, when
error is detected 8 times within two hours
only for outdoor thermistor
Outdoor unit electrical components
defective
Outdoor unit electrical components. (For
details, operate again using remote
controller and check from self-diagnosis
display of outdoor unit)
5
When room thermistor or heat exchanger
thermistor is opened circuit or short circuit.
Room thermistor or heat exchanger
thermistor is faulty
1) Room thermistor
2) Heat exhanger thermistor
6
When over-current is detected at the DC
fan motor of the indoor unit.
Over-current detection at the DC fan
motor
10times
1) Indoor fan locked
2) Indoor fan motor
3) Indoor control P.W.B.
8
1) Connecting Cord Defective
Interface voltage error
2) Outdoor Defective
9 When data read from IC401 or IC402 is
incorrect.
IC401 or IC402 data reading error IC401 or IC402 abnormal
*Note: Refer to Chapter 9 for error codes displayed on remote controllers.
(
Lights for 0.35 sec. at interval of 0.35 sec.)
<Cautions>
1) If the interface circuit is faulty when power is supplied, the self diagnosis display will not be displayed
2) If the indoor unit does not operate at all, check if the connecting cable is connected to the outdoor unit.
2sec
1 time
2sec
2 times
2sec
3 times
2sec
9 times
2sec
10times
2sec
12times
2sec
13times
2sec
4 times