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Troubleshooting for Outdoor Unit (25/35 class)
Si21-205
192
Troubleshooting
6.15.8 Power Supply Waveforms Check
Check No.10
Measure the power supply waveform between pins 1 and 3 on the terminal board, and check
the waveform disturbance.
Check to see if the power supply waveform is a sine wave (Fig.1).
Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2)
6.15.9 Inverter Units Refrigerant System Check
Check No.11
[Fig.1]
[Fig.2]
Refrigerant system check
Check for gas leaks.
See the section on insufficient gas
detection.
Conduct the check after operating the
equipment for a sufficient length of time.
Correct the problem.
Conduct vacuum drying.
Replace the refrigerant.
Is
the discharge
thermister disconnected from
the holder?
(R1445)
YES
YES
YES
Is any moisture
found in sight glass.
NO
NO
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...