Drain Level Control System Abnormality - Daikin VRV S RXQ4/5ARV1 Service Manual

SiAF332111E
5.5

Drain Level Control System Abnormality

Applicable FXFSQ-AR, FXMQ-PB
Models
A3
Error Code
Method of Error By float switch OFF detection
Detection
Error Decision
Float switch goes OFF when the conditions for water level rise are not met
Conditions
Supposed
 220-240 V power supply is not provided.
Causes  Defective float switch or short circuit connector
 Defective drain pump
 Drain clogging, upward slope, etc.
 Defective indoor unit control PCB
 Loose connection of connector
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
NO
Is power supply
220-240 V provided?
YES
The float
NO
switch is
connected to the indoor
unit PCB. (∗1)
YES
The
float switch
contact is forming a
YES
short circuit (continuity check
with the connector (∗1)
disconnected)
NO
NO
Water builds up
in the drain pan.
YES
The
drain pump is
NO
connected to the
indoor unit PCB.
(∗2)
YES
Go to the next page.
A
A short circuit
connector is
connected. (∗1)
YES
Becomes
normal when the
connector (∗1) of the indoor
unit PCB is short
circuited.
YES
The float switch
functions normally.
YES
Troubleshooting by Error Code
Provide 220-240 V power
supply.
NO
Connect either a short circuit
connector or float switch and
turn ON again.
NO
Replace the indoor unit
control PCB (A1P).
Defective connection of
connector.
NO
Replace the float switch (S1L).
Modify the float switch's
connection and turn ON again.
Connect the drain pump and
turn ON again.
199