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Error code
E20
Remote control:
Note (1) Value in ( ) is for FMi2.
1. Applicable model
All models
2. Error detection method
Detected by rotation speed of
indoor fan motor
3. Condition of Error displayed
When the actual fan rotation
speed does not reach to the
speed of [required speed
-1
-500 min
] after 2 minutes
have been elapsed since the fan
motor rotation speed command
was output, the unit stops by
detecting indoor fan motor
anomaly.
4. Presumable cause
• Defective indoor unit power
PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on indoor unit control
PCB
• Blown fuse
• External noise, surge
• Indoor unit control PCB
anomaly
• Motor control PCB
Note:
LED
Green
Red
Keeps flashing 1 ( 2 ) -time flash
Indoor
Keeps flashing Stays OFF
Outdoor
5. Troubleshooting
Diagnosis
Does any
foreign material
intervene in rotational area
of fan propeller?
NO
Does the fan
rotate smoothly when turned
by hand?
YES
•In case of FMi1
(1)
Is DC280V
detected between
of fan power PCB connector
CNM1?
Is the fuse F4 or F1 blown?
YES
(1)
Is DC280V
detected between
of
motor control PCB connector
CNM?
YES
Power source reset
Is it normalized?
(Is DC280V detected between
of motor control PCB
connector CNM? )
88
-
Content
Indoor DC fan motor
rotation speed anomaly (1/2)
YES
NO
•In case of FMi2
To next page
Note(1)
for GND
NO
NO
YES
NO
NO
YES
-
'21 • PAC-SM-396
Countermeasure
Remove foreign material.
Replace the fan motor.
Check power source
voltage.
Replace faulty fan motor
and indoor unit power
PCB.
Replace harness assy
between motor control
PCB and indoor unit power
PCB.
Replace fan motor.
〔 If the error persists after
replacing the fan motor,
replace the indoor unit
control PCB and motor
control PCB. 〕
Malfunction by temporary
noise.
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