Position Sensor Abnormality - Daikin FTKM-U Series Service Manual

SiMX042215E

4.19 Position Sensor Abnormality

H6
Error Code
Method of Error
A compressor start-up failure is detected by the current waveform generated when applying
Detection high frequency voltage to the motor.
Error Decision  The compressor fails to start in about 15 seconds after the compressor run command signal
Conditions
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 11 minutes without any other error
Supposed
 Power supply voltage out of specification
Causes  Disconnection of the compressor harness
 Defective compressor
 Defective outdoor unit PCB
 Start-up failure caused by the closed stop valve
 Input voltage out of specified range
Troubleshooting
Part 6 Service Diagnosis
is sent.
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power.
Check the power supply voltage.
Is the voltage
fluctuation within
±10% from the rated
value?
YES
Check No. 18
Check the discharge pressure.
OK?
YES
Check No. 20
Check the short circuit of the diode
bridge.
Normal?
YES
A Go to the next page
NO
NO
NO
Troubleshooting
Correct the power supply.
Replace the stop valve.
Replace the outdoor unit
PCB (main PCB).
(R24909)
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