Position Sensor Abnormality - Daikin CTX Series Service Manual

DAMA-SM-21-003

4.18 Position Sensor Abnormality

H6
Error Code
Description

Position Sensor Abnormality

Method of Error A compressor start-up failure is detected by checking the compressor running condition through
the position detection circuit.
Detection
 The compressor fails to start in about 15 seconds after the compressor run command signal
Error Decision
Conditions
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 11 minutes without any other error
 Power supply voltage out of specification
Supposed
 Disconnection of the compressor harness
Causes
 Defective compressor
 Defective outdoor unit PCB
 Start-up failure caused by the closed stop valve
 Input voltage out of specified range
Troubleshooting
Reference
Check No.18 Refer to P.89
Reference
Check No.20 Refer to P.90
Service Diagnosis
is sent.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
Turn off the power.
Check the power supply voltage.
NO
Voltage as rated?
YES
Check No. 18
Check the discharge pressure.
NO
OK?
YES
Check No. 20
Check the short circuit of the
diode bridge.
NO
Normal?
YES
Check the connection.
Electrical
components or
NO
compressor harnesses
connected as
specified?
YES
Correct the power supply.
Replace the stop valve.
Replace the outdoor
unit PCB (main PCB).
Reconnect the electrical
components or compressor
harnesses as specified.
Replace the outdoor unit
PCB (main PCB) / compressor
Troubleshooting
75