YES
NO
Does any
foreign material intervene
in rotational area of fan
propeller?
NO
Does the
fan rotate smoothly when turned
by hand?
NO
Is DC308~336V
detected between (CNFAN (blue)- (red))
〔SCM100,125: CNFAN (blue)– (red)〕
of fan motor connector?
Is F3 (250V1A)
ާSCM100, 125: F4 (250V4A)ި
Is normal state restored?
YES
YES
NO
YES
NO
YES
Power supply reset
Remove foreign matter.
Replace fan motor.
If resistance between
➀
(Vm):white -
➃
(GND)
〔
SCM100, 125:
➆
(Vm):
white-
➃
(GND)
〕
:blue is
detected 1k
Ω
or lower, it is
faulty.
Check power supply
voltage.
Replace faulty fan motor
and outdoor main PCB.
Replace fan motor (If
anomaly persists after
replacing fan motor, replace
outdoor main PCB.)
Malfunction by temporary
noise
2. Error detection method
Detected by rotation speed of
outdoor fan motor
3.
Condition of Error displayed
When actual rotation speed
of outdoor fan motor drops to
75min
-1
or lower for 30 minutes
continuously, the compressor
and the outdoor fan motor stop.
After 3-minutes delay, it starts
again automatically, but if this
anomaly occurs 3 times within
60 minutes after the initial
detection.
4. Presumable cause
• Defective outdoor main
(control) PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on outdoor main
(control) PCB
• Blown F3 fuse
Note: When E48 error occurs, in almost cases F3 (SCM100, 125: F4) fuse on the outdoor main (control) PCB is blown. There are a lot of cases that fuse
is blown and E48 occurs due to defective fan motor. And even though only the outdoor main (control) PCB ( or fuse) is replaced,, another trouble
could occur. Therefore when fuse is blown, check whether the fan motor is OK or not.
After conrming the fan motor normal, check by power ON. (Don't power ON without conrming the fan motor normal.)
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