Daikin VRV-WIII RWEYQ72PTJU Service Manual page 162

Troubleshooting by Indication on the Remote Controller
Troubleshooting
154
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is power
NO
supply 208~230V
provided?
YES
The
float switch is
NO
connected to X8A or
X15A of the indoor
unit PCB.
YES
The float
switch contact
is forming a short YES
circuit (continuity check
with X8A or X15A
disconnected)
NO
Water
NO
builds up in the drain
pan.
YES
The
drain pump
NO
is connected to
X25A or terminals Y1 and
Y2 of the indoor
unit PCB.
YES
The
drain pump
YES
works when the power
supply is reset for
the indoor
unit.
NO
The
voltage of
terminals Y1
and Y2 or X25A is NO
208~230V (within 5
minutes of resetting
the power
supply).
YES
A short
circuit
NO
connector is connected
to X8A or X15A.
YES
Becomes
normal when X8A
NO
or X15A of the indoor unit
PCB is short
circuited
YES
The float
NO
switch functions
normally.
YES
SiUS30-1301
Provide 220~240V power
supply.
Connect either a short circuit
connector or float switch and
turn ON again.
Replace the indoor unit PCB.
Loose the connection of
connector.
Replace the float switch.
Modify the float switch's
connection and turn ON again.
Connect the drain pump and
turn ON again.
Check the drain piping for
clogging or upward slope, etc.
Replace the indoor unit PCB.
Replace the drain pump or
check for dirt, etc.
Service Diagnosis