SiUS342303E
Troubleshooting by Error Code
Part 6 Service Diagnosis
250
3.4.2 External Protection Device Abnormality (FXTQ-TA and CXTQ-TA Only)
Applicable
Models
FXTQ-TA, CXTQ-TA
Error Code
A0-01
Method of Error
Detection
Detect open or short circuit between external input terminals in indoor unit.
Error Decision
Conditions
When an open circuit occurs between external input terminals.
Supposed
Causes
Activation of external protection device
Defective indoor unit PCB
Indoor unit fuse blown
24 VAC power is not supplied to TH2 and TR2 terminals (FXTQ-TA) or R and C terminals
(CXTQ-TA) on the indoor unit PCB.
Troubleshooting
F
u
se (F1U) is
b
lown.
24 VAC
power is s
u
pplied
to TH2 and TR2
terminals (FXTQ-TA) or R
and C terminals
(CXTQ-TA).
External
protection de
v
ice
is connected to TB4 and
TB5 of the indoor
u
nit
terminal.
The external
protection de
v
ice is
opened.
Replace the indoor
u
nit PCB.
Confirm that wiring follows
the wiring diagram and then
s
u
pply power to each
terminal.
Acti
v
ation of external protection
de
v
ice.
Replace the f
u
se (F1U).
YES
YES
NO
NO
NO
NO
YES
YES
Caution
Be s
u
re to t
u
rn off the power switch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
Summary of Contents for VRV EMERION RXYQ-AATJA
Page 1: ...Service Manual Heat Pump 60 Hz RXYQ AATJA 208 230 V RXYQ AAYDA 460 V SiUS342303E...
Page 410: ...Wiring Diagrams SiUS342303E 403 Part 7 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 411: ...SiUS342303E Wiring Diagrams Part 7 Appendix 404 FXDQ07 09 12 18 24MVJU C 3D050501C...
Page 416: ...Wiring Diagrams SiUS342303E 409 Part 7 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 417: ...SiUS342303E Wiring Diagrams Part 7 Appendix 410 FXAQ07 09 12 18 24PVJU 3D075354F...
Page 424: ...Wiring Diagrams SiUS342303E 417 Part 7 Appendix VAM1200GVJU 3D073270D...
