Mitsubishi SCM40ZS-S, Техническое руководство

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269
-
'16 • SCM-T-199
Error code
Remote control:
LED Green Red
Indoor Keeps flashing Stays OFF
Content
E48
Outdoor fan motor anomaly
Outdoor
– ON
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 DC308~336V
detected between (CNFAN
④
(black)-
⑥
(red))
〔 SCM50: CNFAN
④
(blue)–
⑥
(red) 〕
of fan motor connector?
Is F3 (250V1A)
Is normal state restored?
YES
YES
NO
YES
NO
YES
Power source reset
Remove foreign matter.
Replace fan motor.
If resistance between
⑥
(Vm):red -
④
(GND):
black or blue (SCM50) is
detected 1k Ω or lower, it is
faulty.
Check power source
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 PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on outdoor main PCB
• Blown F3 fuse
Note: When E48 error occurs, in almost cases F3 fuse on the outdoor main 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 PCB ( or fuse) is replaced,, another trouble could occur. Therefore when fuse is
blown, check whether the fan motor is OK or not.
After confirming the fan motor normal, check by power ON. (Don't power ON without confirming the fan motor normal.)