SiUS39-601
Troubleshooting by Remote Controller
Troubleshooting
117
Outdoor
Unit
LA
9
9
9
Malfunction of power unit
—
LC
9
9
9
Malfunction of transmission between inverter and
control PC board
166
P1
9
9
9
Inverter over-ripple protection
168
P4
9
9
9
Malfunction of inverter radiating fin temperature rise
sensor
170
PJ
9
9
9
Faulty field setting or faulty combination of PC board
171
System
U0
8
7
9
Low pressure drop due to refrigerant shortage or
electronic expansion valve failure
172
U1
9
9
9
Reverse phase / open phase
174
U2
9
9
9
Power supply insufficient or instantaneous failure
175
U3
9
9
9
Check operation is not conducted.
177
U4
9
9
9
Malfunction of transmission between indoor and
outdoor units
178
U5
9
9
9
Malfunction of transmission between remote
controller and indoor unit
180
U5
7
8
7
Failure of remote controller PC board or setting
during control by remote controller
180
U7
9
9
9
Malfunction of transmission between outdoor units
181
U8
9
9
7
Malfunction of transmission between main and sub
remote controllers (malfunction of sub remote
controller)
183
U9
9
9
9
Malfunction of transmission between indoor unit and
outdoor unit in the same system
184
UA
9
9
9
Excessive number of indoor units etc.
186
UC
8
8
8
Address duplication of central remote controller
188
UE
9
9
9
Malfunction of transmission between central remote
controller and indoor unit
189
200
UF
9
9
9
Refrigerant system not set, incompatible wiring /
piping
191
UH
9
9
9
Malfunction of system, refrigerant system address
undefined
192
Central
remote
Control
ler and
Schedu
le
Timer
M1
8
or
7
9
9
Central remote controller or schedule timer PC board
defect
194
202
M8
8
or
7
9
9
Malfunction of transmission between optional
controllers for centralized control
195
203
MA
8
or
7
9
9
Improper combination of optional controllers for
centralized control
197
205
MC
8
or
7
9
9
Address duplication, improper setting
199
207
Heat
Reclai
m
Ventilat
ion
64
8
7
9
Indoor unit’s air thermistor error
—
65
8
7
9
Outside air thermistor error
—
6A
8
7
9
Damper system alarm
—
6A
9
9
9
Damper thermistor error
—
6F
8
7
9
Malfunction of simple remote controller
—
6H
8
7
9
Malfunction of door switch or connector
—
94
9
9
9
Internal transmission error
—
Malfunction
code
Operation
lamp
Inspection
display
Unit No.
Malfunction contents
Page
Referred
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.
Summary of Contents for RXYQ72
Page 115: ...Field Setting SiUS39 601 104 Test Operation...
Page 227: ...Troubleshooting OP Unified ON OFF Controller SiUS39 601 216 Troubleshooting...
Page 231: ...Piping Diagrams SiUS39 601 220 Appendix 1 Piping Diagrams 1 1 Outdoor Unit RXYQ72M 96M...
Page 236: ...SiUS39 601 Wiring Diagrams for Reference Appendix 225 RXYQ144 168 192MTJU C 3D050353A...
Page 249: ...Example of Connection SiUS39 601 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 601 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 601 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 601 iv Index...
