Position Sensor Abnormality - Daikin Sky Air B-Series R-410A Service Manual

Troubleshooting for Outdoor Unit (25/35 class)
6.6

Position Sensor Abnormality

H6
Remote
Controller
Display
Method of
A compressor startup failure is detected by checking the compressor running condition through
Malfunction the position detection circuit.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.13
Refer to P.193
170
The compressor fails to start in about 15 seconds after the compressor run command signal
is sent.
Clearing condition: Continuous run for about 5 minutes (normal)
The system will be shut down if the error occurs 16 times.
Compressor itself defective
Outdoor unit PCB defective
Stop valve closed
Input voltage out of specification
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check No. 13
Check for short-circuit.
Normal
YES
Check the electrolytic capacitor
voltage.
DC290~380V?
YES
Electricals
or compressor harnesses
connected as
specified?
YES
Turn off the power. Disconnect the
harnesses U, V and W.
Check with the inverter checker (∗).
Any LED off?
NO
NO
NO
NO
YES
Si21-205
Replace the outdoor unit
PCB.
Replace the outdoor unit
PCB.
Reconnect as specified.
∗ Inverter checker
Part No.: 1225477
Correct the power supply or
replace the outdoor unit
PCB.
Replace the compressor.
(R3041)
Troubleshooting