-
247
-
'17 • SCM-T-225
None
Power source system error
(Power source to indoor control PCB)
Stays OFF Stays OFF
Outdoor
–
Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis
Countermeasure
Is
AC220/240V
detected between
➀
and
➁
on the terminal block
of indoor
unit?
NO
NO
Are fuses
OK (F200, F201
or F1, 2 )?
YES
YES
NO
Is the
check of resistance between
➀
-
➂
of CNW0
OK?
NO
Is the
checked result
of resistance of FM,
LM, etc
OK?
NO
Is
AC220/240V
for 1-phase unit detected between
➀
and
➁
on the terminal
block of outdoor
unit?
YES
YES
Is AC19V or
higher detected between Red-
Red (CNW2) at transformer
secondary side?
YES
YES
NO
(1)
FDTC, FDE,
FDUM Series
FDEN Series
Note (1)
➄
for GND
NO
NO
Is DC5V detected
between
➃
-
➄
of CNW2
(FDE, FDUM:CNW1)?
NO
YES
YES
Is JX1 open?
Is JX1 open?
YES
Defective outdoor control
PCB (Noise filter)
Misconnection or breakage
of connecting wires
Defective indoor control or
power PCB
➞
Replace.
Replace FM, LM, etc.
Replace fuse.
Defective indoor power
PCB
➞
Replace.
Open JX1.
Defective indoor control
PCB
➞
Replace.
Replace transformer.
Open JX1.
Defective indoor unit
PCB
➞
Replace.
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Misconnection or breakage of
connecting wires
• Blown fuse
• Faulty indoor control or
power PCB
• Broken harness
• Faulty outdoor control PCB
(Noise filter)
Note:
Error code
Remote control:
LED
Green
Red
Indoor
Content
