-
163
-
'20 • PAC-SM-351
Error code
Remote control:
Content
1-time flashKeeps flashing
Keeps flashing
7-time flashON
Indoor display
RUN light TIMER light
Green LED
Yellow LED
Red LED
Outdoor unit
control PCB
Outdoor unit
inverter PCB
E48
Outdoor fan motor anomaly
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
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 DC280V
detected between (CNFAN ➀
(red)-➃ (blue)) of fan motor
connector?
Is F2 fuse blown?
Is normal state restored?
YES
YES
NO
YES
NO
YES
Power source reset
Remove foreign material.
Replace fan motor.
If resistance between
➀
(Vm):red -
➃
(GND):blue is
detected 1k
Ω
or lower, it is
faulty.
Check power source
voltage.
Replace faulty fan motor
and outdoor unit control
PCB.
Replace fan motor (If
anomaly persists after
replacing fan motor, replace
outdoor unit control 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 (FMo1, 2)
drops to 100min
-1
or lower
for 30 seconds continuously,
the compressor and the
outdoor fan motor stop. After
3-minute delay, it starts again
automatically, but if this
anomaly occurs 5 times within
60 minutes after the initial
detection.
4. Presumable cause
• Defective outdoor unit control
PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on outdoor unit control
PCB
• Blow fuse
• External noise, surge
Note: When E48 error occurs, in almost cases F2 fuse (4A) on the outdoor unit 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 unit control PCB ( or fuse) is replaced,, another trouble (*1) 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.)
*1 The error which does not seem to relate E48 may occur like as “
”, Stay OFF of LED on outdoor unit control PCB, inverter
communication error (E45) and etc.
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