Mitsubishi SCM40ZJ-S Service Manual page 105

Error code
Remote controller:
WAIT
1. Applicable model
All models
When the remote controller
display is extinguished after the
power on.
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Blown fuse
• Connection between PCB's
• Blown fuse
• Faulty indoor control PCB
• Defective remote controller
• Wire breakage on remote
controller
• Faulty outdoor sub PCB
Note:
LED Green Red
Indoor Keeps flashing Stays OFF
– Stays OFF
Outdoor
5. Troubleshooting
Diagnosis
Remote controller display is
extinguished after the power on.
Is the
green LED on the indoor unit
flashing?
YES
Are wires
connected properly between the indoor and
the outdoor units?
YES
Is approx.
DC20V detected between �-�
on the outdoor unit terminal
block?
YES
Is approx
DC20V detected between �-�
on the indoor unit terminal
block?
104
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Content
Communication error at
initial operation (3/3)
NO
Is the
fuse on the indoor control
PCB OK?
YES
(1)
Is AC
19V or higher detected
between Red-Red at the secondary side of
indoor unit transformer?
YES Note (1) FDEN only.
Is
approx. 10-11V detected
between wires at the remote controller
side after disconnecting the
remote controller?
YES
NO
NO
NO
YES
-
'11 • SCM-SM-110
Countermeasure
Replace fuse.
NO
Defective transformer
NO
Short-circuit on remote
NO
controller wire
Defective remote controller
Correct wires.
Defective outdoor sub
PCB ➞ Replace.
Defective connection wire
(Broken wire)
Noise
Defective indoor control
PCB ➞ Replace.