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SiAF332111E
Troubleshooting by Error Code
Part 6 Service Diagnosis
199
5.5 Drain Level Control System Abnormality
Applicable
Models
FXFSQ-AR, FXMQ-PB
Error Code
A3
Method of Error
Detection
By float switch OFF detection
Error Decision
Conditions
Float switch goes OFF when the conditions for water level rise are not met
Supposed
Causes
220-240 V power supply is not provided.
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
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the float switch (S1L).
Modify the float switch's
connection and turn ON again.
Connect the drain pump and
turn ON again.
Connect either a short circuit
connector or float switch and
turn ON again.
YES
YES
YES
YES
YES
Replace the indoor unit
control PCB (A1P).
Defective connection of
connector.
NO
NO
NO
YES
NO
NO
YES
NO
NO
Provide 220-240 V power
supply.
Go to the next page.
YES
NO
Is power supply
220-240 V provided?
Water builds up
in the drain pan.
A short circuit
connector is
connected. (
∗
1)
The float switch
functions normally.
The float
switch is
connected to the indoor
unit PCB. (
∗
1)
The
drain pump is
connected to the
indoor unit PCB.
(
∗
2)
The
float switch
contact is forming a
short circuit (continuity check
with the connector (
∗
1)
disconnected)
Becomes
normal when the
connector (
∗
1) of the indoor
unit PCB is short
circuited.
A
Summary of Contents for VRV S RXMQ10ARY1
Page 1: ...Service Manual Cooling Only 50 60 Hz RXQ4 5ARV1 RXMQ6ARV1 RXMQ8 10 12ARY1 SiAF332111E...
Page 369: ...SiAF332111E Wiring Diagrams Part 7 Appendix 363 RXMQ6ARV1 C 3D137051...
Page 370: ...Wiring Diagrams SiAF332111E 364 Part 7 Appendix RXMQ8ARY1 C 3D137060...
Page 371: ...SiAF332111E Wiring Diagrams Part 7 Appendix 365 RXMQ10 12ARY1 3D121610B...
Page 375: ...SiAF332111E Wiring Diagrams Part 7 Appendix 369 FXMQ40 50 63 80 100ARV1 3D127112 04 59...