Check
SiENBE12-713
282
Service Diagnosis
6.1.9 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)
6.1.10 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 FTKS20D3VMW
Page 11: ...Introduction SiENBE12 713 x...
Page 47: ...Specifications SiENBE12 713 36 Specifications...
Page 113: ...Control Specification SiENBE12 713 102 Function and Control...
Page 235: ...Instruction SiENBE12 713 224 System Configuration...
Page 297: ...Check SiENBE12 713 286 Service Diagnosis...
Page 316: ...SiENBE12 713 Outdoor Unit Removal Procedure 305 Step Procedure Points...