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SiBE12-519
Troubleshooting
Service Diagnosis
167
4.21
Over-voltage Detection
Remote
Controller
Display
U2
Method of
Malfunction
Detection
An abnormal voltage rise 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
more than 430 V occurred the voltage detected by the DC voltage detection circuit.
The system will be shut down if the error occurs 4 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
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.
∗
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
Summary of Contents for 2MKS40DVMB
Page 10: ...SiBE12 519 List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Page 15: ...Heat Pump SiBE12 519 6 List of Functions ...
Page 29: ...Heat Pump SiBE12 519 20 Specifications ...
Page 135: ...Instruction SiBE12 519 126 System Configuration ...
Page 211: ...Outdoor Unit SiBE12 519 202 Removal Procedure ...