Daikin J Series Wartungshandbuch Seite 197

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Seitenansicht 196
Troubleshooting - Split Type Indoor Unit SiE18-201
186 Service Diagnosis
1.5.5 Faulty Indoor Unit PCB
Remote
Controller
Display
Indoor Unit LED
Display
A 4 B
Note: No LED Display on FTK(X)25/35J Series.
Method of
Malfunction
Detection
The proper program operation of the microcomputer is checked by the program.
Malfunction
Decision
Conditions
When the microcomputer program does not function properly.
Supposed
Causes
Microcomputer program is in abnormal condition due to an external factor.
Noise.
Momentary voltage drop.
Momentary power failure, etc.
Faulty indoor unit PCB.
Troubleshooting
Turn on the power again.
Check the grounding. (earth)
YES
Replace the outdoor unit
PCB.
Provide proper grounding.
The malfunction may be
caused by an external
factor, rather than defective
parts.
Locate the cause of the
noise, etc., and correct the
situation.
Does the same
LED indication appear
again?
Is the grounding proper?
(MF005)
NO
YES
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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