Daikin RZQ Series FCQ20EVA Service Manual page 118

Troubleshooting by Remote Controller
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Check the installation conditions.
Is the stop valve open?
protection high pressure switch
connected to outdoor
Turn OFF the power supply. Wait for
10 minutes after compressor stops
operating, then check the following.
continuity in control and
protection high pressure
Is high pressure abnormally
Set the remote controller and turn ON
again.
Is the error code "
CHECK 2 Refer to P.154.
109
NO
YES
Are control and
NO
unit PCB?
YES
Is there
NO
switch?
YES
CHECK 2
YES
high?
NO
H3
YES
"
displayed?
NO
SiME281501E
Open the stop valve.
Connect correctly.
Replace the high pressure
switch with no continuity.
Correct the high pressure.
Replace the high pressure
switch.
Replace the outdoor unit PCB
(A1P).
Service Diagnosis