Troubleshooting by Error Code
SiUS331708EA
163
Service Diagnosis
4.6
Drain Level Control System (S1L) Abnormality
Error Code
A3
Applicable
Models
FXFQ, FXZQ, FXUQ-P, FXEQ-P, FXDQ-M, FXSQ-TA, FXMQ-PB
Method of Error
Detection
By float switch OFF detection
Error Decision
Conditions
When rise of water level is not a condition and the float switch goes OFF
Supposed
Causes
208-230 V power supply is not provided
Defective float switch or short circuit connector
Defective drain pump
Drain clogging, upward slope, etc.
Defective indoor unit main 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.
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 main
PCB (A1P).
Loose the connection of
connector.
NO
NO
NO
YES
NO
NO
YES
NO
NO
Provide 208-230 V power
supply.
YES
NO
Is power supply
208-230 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
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Summary of Contents for RXSQ24TAVJU
Page 1: ...Service Manual SiUS331708EA RXSQ24 36 48 60TAVJU Heat Pump 60 Hz...
Page 290: ...Wiring Diagrams SiUS331708EA 277 Appendix RXSQ48TAVJU 3D109546A...
Page 291: ...SiUS331708EA Wiring Diagrams Appendix 278 RXSQ60TAVJU 3D109547A...
Page 295: ...SiUS331708EA Wiring Diagrams Appendix 282 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 298: ...Wiring Diagrams SiUS331708EA 285 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 300: ...Wiring Diagrams SiUS331708EA 287 Appendix FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU 3D110467B...
Page 301: ...SiUS331708EA Wiring Diagrams Appendix 288 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 302: ...Wiring Diagrams SiUS331708EA 289 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 303: ...SiUS331708EA Wiring Diagrams Appendix 290 FXAQ07 09 12 18 24PVJU 3D075354C...
Page 309: ...SiUS331708EA Wiring Diagrams Appendix 296 VAM1200GVJU 3D073270D...