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SiENBE04-401A
Troubleshooting
Service Diagnosis
137
4.21 Over-voltage Detection
Remote control
Display
U2
Method of
Malfunction
Detection
An abnormal voltage rise is detected by checking the specified over-voltage detection circuit.
Malfunction
Decision
Conditions
An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer
(The voltage is over 400V).
The system will be shut down if the error occurs 255 times.
Clearing condition: Continuous run for about 10 minutes (normal)
Supposed
Causes
Supply voltage not as specified
Over-voltage detection circuit defective
PAM control part(s) defective
Troubleshooting
Note:
If the model doesn’t have SPM, replace the outdoor unit PCB.
Check the supply voltage.
Correct the power supply.
Check for such factors for a
long term.
Replace the SPM.
(Replace the outdoor unit
PCB.)
(R2957)
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.
Error displayed again?
YES
Repeat a
couple of times.
NO
Disturbance factors
∗
Noise
∗
Power supply distortion
Содержание ARKH20CAVMB
Страница 19: ...List of Functions SiENBE04 401A 10 List of Functions ...
Страница 20: ...SiENBE04 401A Specifications 11 Part 2 Specifications 1 Specifications 12 1 1 Cooling Only 12 1 2 Heat Pump 20 ...
Страница 45: ...Specifications SiENBE04 401A 36 Specifications ...
Страница 81: ...Control Specification SiENBE04 401A 72 Function and Control ...
Страница 111: ...Instruction SiENBE04 401A 102 System Configuration ...
Страница 155: ...Check SiENBE04 401A 146 Service Diagnosis ...
Страница 225: ...Outdoor Unit RK X H C ARK X H C R Y N C SiENBE04 401A 216 Removal Procedure ...
Страница 226: ...SiENBE04 401A Others 217 Part 8 Others 1 Others 218 1 1 Test Run from the Remote Control 218 1 2 Jumper Settings 219 ...
Страница 229: ...Others SiENBE04 401A 220 Others ...
Страница 239: ...Wiring Diagrams SiENBE04 401A 230 Appendix ...