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Troubleshooting
SiEN04-306D
138
Service Diagnosis
4.21 Low-voltage Detection
remote control
Display
U2
Method of
Malfunction
Detection
An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage
detection circuit.
Malfunction
Decision
Conditions
An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or
the voltage being detected by the DC voltage detection circuit is judged to be below 150 V
for 0.1 second.
The system will be shut down if the error occurs 16 times.
Clearing condition: Continuous run for about 60 minutes (normal)
Supposed
Causes
Supply voltage not as specified
Over-voltage detector or DC voltage detection circuit defective
PAM control part(s) defective
Troubleshooting
Check the supply voltage.
Correct the power supply.
Check for such factors for a
long term.
∗
Try to get restarted a
couple of times.
Replace the SPM.
(Replace the outdoor unit
PCB.)
(R2854)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Supply voltage as
specified?
NO
YES
Turn on the
power again.
System restarted?
NO
Repeat a
couple of times.
YES
(Precaution before turning on the power again)
Make sure the power has been off for
at least 30 seconds.
Disturbance factors
∗
Noise
∗
Power supply distortion
Содержание SiEN04-306D
Страница 109: ...Instruction SiEN04 306D 100 System Configuration...
Страница 199: ...Outdoor Unit SiEN04 306D 190 Removal Procedure...
Страница 200: ...SiEN04 306D Others 191 Part 8 Others 1 Others 192 1 1 Test Run from the remote control 192 1 2 Jumper Settings 193...
Страница 203: ...Others SiEN04 306D 194 Others...
Страница 214: ...SiEN04 306D Wiring Diagrams Appendix 205 FTKD18 24 28BVMS...
Страница 216: ...SiEN04 306D Wiring Diagrams Appendix 207 RKD18 24 28BVMS...
Страница 217: ...Wiring Diagrams SiEN04 306D 208 Appendix...