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SiUS39-602
Troubleshooting by Indication on the Remote Controller
Troubleshooting
187
2.51
“
UA
”
Improper Combination of Indoor Units and Outdoor
Units/Indoor Units and Remote Controller
Remote
Controller
Display
UA
Applicable
Models
All indoor unit models
REYQ72M, 96M
Remote controller
Method of
Malfunction
Detection
A difference occurs in data by the type of refrigerant between indoor and outdoor units.
The number of indoor units is outside of the allowable range.
Malfunction
Decision
Conditions
The malfunction decision is made as soon as either of the abnormalities aforementioned is
detected.
Supposed
Causes
Excess of connected indoor units
Defect of outdoor unit PC board (A1P)
Mismatching of the refrigerant type of indoor and outdoor unit
Setting of outdoor PC board was not conducted after replacing to spare parts PC board
Troubleshooting
∗
The number of indoor units that can be connected to a single outdoor unit system depends on
the type of outdoor unit.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2827)
The total
of indoor units
displaying "UA" and
indoor units connected to the
same refrigerant system is
within connectable
number of
unit
∗
Normal
NO
NO
There are too many indoor units
within the same refrigerant
system.
Push and hold the RESET
button on the outdoor unit
PC board for 5 seconds.
YES
Is the outdoor
PC board replaced
to spare parts PC
board ?
YES
The setting after replacing spare
PC board has not been set yet.
Please set as per page83.
NO
YES
Does a malfunction occur?
Replace outdoor unit PC board
(A1P).
Matches the refrigerant type of
indoor and outdoor unit.
NO
YES
Does the
refrigerant type of indoor
and outdoor unit
match?
Summary of Contents for REYQ72
Page 35: ...Specifications SiUS39 602 24 Specifications...
Page 121: ...Field Setting SiUS39 602 110 Test Operation...
Page 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Page 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Page 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Page 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Page 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Page 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 602 iv Index...