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Troubleshooting
SiUS04-924
104
Service Diagnosis
4.24 Low-voltage Detection or Over-voltage Detection
Remote
Controller
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
Short circuit inside the fan motor winding.
Troubleshooting
Correct the power supply.
Replace the PM1.
Check for such factors long
term.
*
Try to get restarted a
couple of times.
(R7179)
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
NO
YES
YES
NO
YES
(Precaution before turning on the power again)
NO
Replace fan motor and
outdoor unit PCB.
(Replace the outdoor unit
PCB.)
Check the supply voltage.
Rotate fan by hand.
Disturbance factors
*
Noise
*
Power supply distortion
Repeat a
couple of times.
Make sure the power has been off for
at least 30 seconds.
Turn on the
power again. System
restarted?
Does fan rotate
smoothly?
Supply voltage as
specified?
Summary of Contents for FTXS30HVJU
Page 1: ...SiUS04 924 Applied Models Inverter Pair Heat Pump Inverter Pair Wall Mounted Type H Series ...
Page 8: ...SiUS04 924 List of Functions 1 Part 1 List of Functions 1 List of Functions 2 ...
Page 10: ...SiUS04 924 Specifications 3 Part 2 Specifications 1 Specifications 4 ...
Page 50: ...Control Specification SiUS04 924 Function and Control 43 ...
Page 53: ...Instruction SiUS04 924 46 Operation Manual 2 Instruction 2 1 Remote Controller ...
Page 54: ...SiUS04 924 Instruction Operation Manual 47 operation ...
Page 55: ...Instruction SiUS04 924 48 Operation Manual 2 2 AUTO DRY COOL HEAT FAN Operation ...
Page 56: ...SiUS04 924 Instruction Operation Manual 49 ...
Page 58: ...SiUS04 924 Instruction Operation Manual 51 fins fins fins fins angles Inside ...
Page 60: ...SiUS04 924 Instruction Operation Manual 53 2 5 INTELLIGENT EYE Operation fins above ...
Page 61: ...Instruction SiUS04 924 54 Operation Manual ...
Page 62: ...SiUS04 924 Instruction Operation Manual 55 2 6 POWERFUL Operation ...
Page 63: ...Instruction SiUS04 924 56 Operation Manual 2 7 OUTDOOR UNIT QUIET Operation ...
Page 64: ...SiUS04 924 Instruction Operation Manual 57 2 8 ECONO Operation ...
Page 65: ...Instruction SiUS04 924 58 Operation Manual 2 9 TIMER Operation ...
Page 66: ...SiUS04 924 Instruction Operation Manual 59 ...
Page 69: ...Instruction SiUS04 924 62 Operation Manual ...
Page 70: ...SiUS04 924 Instruction Operation Manual 63 ...
Page 71: ...Instruction SiUS04 924 64 Operation Manual ...
Page 72: ...SiUS04 924 Instruction Operation Manual 65 3P228444 2B ...
Page 193: ...SiUS04 924 187 Appendix Part 9 Appendix 1 Piping Diagrams 188 2 Wiring Diagrams 189 ...